From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:45:59 +0200
Subject: Adding upstream version 16.2.11+ds.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/boost/libs/gil/test/CMakeLists.txt             |    38 +
 src/boost/libs/gil/test/Jamfile                    |   134 +
 src/boost/libs/gil/test/core/CMakeLists.txt        |    41 +
 src/boost/libs/gil/test/core/Jamfile               |    34 +
 .../libs/gil/test/core/algorithm/CMakeLists.txt    |    27 +
 src/boost/libs/gil/test/core/algorithm/Jamfile     |    13 +
 .../gil/test/core/algorithm/for_each_pixel.cpp     |    34 +
 .../libs/gil/test/core/algorithm/std_fill.cpp      |    55 +
 .../test/core/algorithm/std_uninitialized_fill.cpp |   223 +
 .../libs/gil/test/core/channel/CMakeLists.txt      |    35 +
 src/boost/libs/gil/test/core/channel/Jamfile       |    23 +
 src/boost/libs/gil/test/core/channel/TODO.md       |    10 +
 .../core/channel/algorithm_channel_arithmetic.cpp  |   170 +
 .../core/channel/algorithm_channel_convert.cpp     |   261 +
 .../test/core/channel/algorithm_channel_invert.cpp |   118 +
 .../core/channel/algorithm_channel_multiply.cpp    |   119 +
 .../core/channel/algorithm_channel_relation.cpp    |   127 +
 .../libs/gil/test/core/channel/channel_traits.cpp  |    65 +
 src/boost/libs/gil/test/core/channel/concepts.cpp  |   100 +
 .../gil/test/core/channel/is_channel_integral.cpp  |    74 +
 .../gil/test/core/channel/packed_channel_value.cpp |   137 +
 .../gil/test/core/channel/scoped_channel_value.cpp |   110 +
 .../libs/gil/test/core/channel/test_fixture.cpp    |   134 +
 .../libs/gil/test/core/channel/test_fixture.hpp    |   252 +
 src/boost/libs/gil/test/core/color/CMakeLists.txt  |    28 +
 src/boost/libs/gil/test/core/color/Jamfile         |    15 +
 .../core/color/color_spaces_are_compatible.cpp     |    46 +
 src/boost/libs/gil/test/core/color/concepts.cpp    |    50 +
 .../core/color/default_color_converter_impl.cpp    |   112 +
 .../color/default_color_converter_impl_fail.cpp    |    33 +
 .../libs/gil/test/core/color_base/CMakeLists.txt   |    28 +
 src/boost/libs/gil/test/core/color_base/Jamfile    |    16 +
 .../libs/gil/test/core/color_base/concepts.cpp     |    54 +
 .../core/color_base/homogeneous_color_base.cpp     |   141 +
 .../gil/test/core/color_base/static_transform.cpp  |    72 +
 .../static_transform_gray_to_rgb_fail.cpp          |    40 +
 .../static_transform_rgb_to_cmyk_fail.cpp          |    42 +
 src/boost/libs/gil/test/core/image/CMakeLists.txt  |    27 +
 src/boost/libs/gil/test/core/image/Jamfile         |    13 +
 src/boost/libs/gil/test/core/image/concepts.cpp    |    30 +
 src/boost/libs/gil/test/core/image/image.cpp       |    91 +
 .../libs/gil/test/core/image/test_fixture.hpp      |    71 +
 .../gil/test/core/image_processing/CMakeLists.txt  |    53 +
 .../libs/gil/test/core/image_processing/Jamfile    |    21 +
 .../gil/test/core/image_processing/box_filter.cpp  |    65 +
 .../libs/gil/test/core/image_processing/harris.cpp |    73 +
 .../gil/test/core/image_processing/hessian.cpp     |    72 +
 .../test/core/image_processing/lanczos_scaling.cpp |    67 +
 .../test/core/image_processing/median_filter.cpp   |    65 +
 .../test/core/image_processing/simple_kernels.cpp  |    68 +
 .../test/core/image_processing/sobel_scharr.cpp    |    50 +
 .../core/image_processing/threshold_binary.cpp     |   137 +
 .../threshold_color_spaces_not_compatible_fail.cpp |    25 +
 .../test/core/image_processing/threshold_otsu.cpp  |   118 +
 .../core/image_processing/threshold_truncate.cpp   |   233 +
 .../libs/gil/test/core/image_view/CMakeLists.txt   |    43 +
 src/boost/libs/gil/test/core/image_view/Jamfile    |    29 +
 .../gil/test/core/image_view/axis_iterator.cpp     |    91 +
 .../libs/gil/test/core/image_view/collection.cpp   |   119 +
 .../libs/gil/test/core/image_view/concepts.cpp     |    96 +
 .../gil/test/core/image_view/derived_view_type.cpp |    45 +
 .../libs/gil/test/core/image_view/dynamic_step.cpp |   133 +
 .../libs/gil/test/core/image_view/is_planar.cpp    |    77 +
 .../libs/gil/test/core/image_view/iterator.cpp     |    95 +
 .../gil/test/core/image_view/planar_rgba_view.cpp  |    71 +
 .../gil/test/core/image_view/reverse_iterator.cpp  |    54 +
 .../gil/test/core/image_view/subimage_view.cpp     |    91 +
 .../libs/gil/test/core/image_view/test_fixture.hpp |    37 +
 .../gil/test/core/image_view/view_is_basic.cpp     |    76 +
 .../gil/test/core/image_view/view_is_mutable.cpp   |    76 +
 .../libs/gil/test/core/image_view/view_is_step.cpp |    57 +
 .../libs/gil/test/core/image_view/view_type.cpp    |   114 +
 .../test/core/image_view/view_type_from_pixel.cpp  |   119 +
 .../libs/gil/test/core/image_view/x_iterator.cpp   |    98 +
 .../libs/gil/test/core/image_view/xy_locator.cpp   |   122 +
 .../libs/gil/test/core/image_view/y_iterator.cpp   |   118 +
 .../libs/gil/test/core/iterator/CMakeLists.txt     |    28 +
 src/boost/libs/gil/test/core/iterator/Jamfile      |    13 +
 src/boost/libs/gil/test/core/iterator/concepts.cpp |   172 +
 .../libs/gil/test/core/iterator/dynamic_step.cpp   |   160 +
 .../libs/gil/test/core/iterator/is_planar.cpp      |    72 +
 .../libs/gil/test/core/locator/CMakeLists.txt      |    27 +
 src/boost/libs/gil/test/core/locator/Jamfile       |    12 +
 src/boost/libs/gil/test/core/locator/concepts.cpp  |   202 +
 .../libs/gil/test/core/locator/dynamic_step.cpp    |    92 +
 src/boost/libs/gil/test/core/pixel/CMakeLists.txt  |    34 +
 src/boost/libs/gil/test/core/pixel/Jamfile         |    20 +
 .../core/pixel/bit_aligned_pixel_reference.cpp     |    46 +
 src/boost/libs/gil/test/core/pixel/concepts.cpp    |    67 +
 src/boost/libs/gil/test/core/pixel/is_pixel.cpp    |    77 +
 src/boost/libs/gil/test/core/pixel/is_planar.cpp   |   137 +
 .../libs/gil/test/core/pixel/num_channels.cpp      |   154 +
 .../libs/gil/test/core/pixel/packed_pixel.cpp      |   336 +
 .../test/core/pixel/pixel_reference_is_mutable.cpp |    35 +
 .../gil/test/core/pixel/pixels_are_compatible.cpp  |   132 +
 .../libs/gil/test/core/pixel/test_fixture.cpp      |   113 +
 .../libs/gil/test/core/pixel/test_fixture.hpp      |   346 +
 src/boost/libs/gil/test/core/point/CMakeLists.txt  |    27 +
 src/boost/libs/gil/test/core/point/Jamfile         |    14 +
 src/boost/libs/gil/test/core/point/concepts.cpp    |    51 +
 .../core/point/multiply_by_non_arithmetic_fail.cpp |    23 +
 src/boost/libs/gil/test/core/point/point.cpp       |   235 +
 src/boost/libs/gil/test/core/promote_integral.cpp  |   370 +
 src/boost/libs/gil/test/core/test_fixture.cpp      |    71 +
 src/boost/libs/gil/test/core/test_fixture.hpp      |    82 +
 src/boost/libs/gil/test/extension/CMakeLists.txt   |    22 +
 src/boost/libs/gil/test/extension/Jamfile          |    12 +
 .../test/extension/dynamic_image/CMakeLists.txt    |    27 +
 .../libs/gil/test/extension/dynamic_image/Jamfile  |    13 +
 .../test/extension/dynamic_image/subimage_view.cpp |    96 +
 .../test/extension/dynamic_image/test_fixture.hpp  |    61 +
 .../libs/gil/test/extension/io/CMakeLists.txt      |    19 +
 src/boost/libs/gil/test/extension/io/Jamfile       |    49 +
 src/boost/libs/gil/test/extension/io/bmp/Jamfile   |    26 +
 .../libs/gil/test/extension/io/bmp/bmp_make.cpp    |   289 +
 .../gil/test/extension/io/bmp/bmp_old_test.cpp     |    97 +
 .../gil/test/extension/io/bmp/bmp_read_test.cpp    |   463 +
 .../libs/gil/test/extension/io/bmp/bmp_test.cpp    |   284 +
 .../gil/test/extension/io/bmp/bmp_write_test.cpp   |    53 +
 src/boost/libs/gil/test/extension/io/cmp_view.hpp  |    37 +
 .../test/extension/io/color_space_write_test.hpp   |    52 +
 .../gil/test/extension/io/images/bmp/g01bg.bmp     |   Bin 0 -> 1086 bytes
 .../gil/test/extension/io/images/bmp/g01bw.bmp     |   Bin 0 -> 1086 bytes
 .../gil/test/extension/io/images/bmp/g01p1.bmp     |   Bin 0 -> 1082 bytes
 .../gil/test/extension/io/images/bmp/g01wb.bmp     |   Bin 0 -> 1086 bytes
 .../libs/gil/test/extension/io/images/bmp/g04.bmp  |   Bin 0 -> 4214 bytes
 .../gil/test/extension/io/images/bmp/g04p4.bmp     |   Bin 0 -> 4166 bytes
 .../gil/test/extension/io/images/bmp/g04rle.bmp    |   Bin 0 -> 922 bytes
 .../libs/gil/test/extension/io/images/bmp/g08.bmp  |   Bin 0 -> 9270 bytes
 .../gil/test/extension/io/images/bmp/g08offs.bmp   |   Bin 0 -> 9370 bytes
 .../gil/test/extension/io/images/bmp/g08os2.bmp    |   Bin 0 -> 8986 bytes
 .../gil/test/extension/io/images/bmp/g08p256.bmp   |   Bin 0 -> 9270 bytes
 .../gil/test/extension/io/images/bmp/g08p64.bmp    |   Bin 0 -> 8502 bytes
 .../gil/test/extension/io/images/bmp/g08pi256.bmp  |   Bin 0 -> 9270 bytes
 .../gil/test/extension/io/images/bmp/g08pi64.bmp   |   Bin 0 -> 9270 bytes
 .../gil/test/extension/io/images/bmp/g08res11.bmp  |   Bin 0 -> 9270 bytes
 .../gil/test/extension/io/images/bmp/g08res21.bmp  |   Bin 0 -> 9270 bytes
 .../gil/test/extension/io/images/bmp/g08res22.bmp  |   Bin 0 -> 9270 bytes
 .../gil/test/extension/io/images/bmp/g08rle.bmp    |   Bin 0 -> 1820 bytes
 .../gil/test/extension/io/images/bmp/g08s0.bmp     |   Bin 0 -> 9270 bytes
 .../gil/test/extension/io/images/bmp/g08w124.bmp   |   Bin 0 -> 8642 bytes
 .../gil/test/extension/io/images/bmp/g08w125.bmp   |   Bin 0 -> 9014 bytes
 .../gil/test/extension/io/images/bmp/g08w126.bmp   |   Bin 0 -> 9142 bytes
 .../gil/test/extension/io/images/bmp/g16bf555.bmp  |   Bin 0 -> 16450 bytes
 .../gil/test/extension/io/images/bmp/g16bf565.bmp  |   Bin 0 -> 16450 bytes
 .../gil/test/extension/io/images/bmp/g16def555.bmp |   Bin 0 -> 16438 bytes
 .../libs/gil/test/extension/io/images/bmp/g24.bmp  |   Bin 0 -> 24630 bytes
 .../gil/test/extension/io/images/bmp/g32bf.bmp     |   Bin 0 -> 32578 bytes
 .../gil/test/extension/io/images/bmp/g32def.bmp    |   Bin 0 -> 32566 bytes
 .../gil/test/extension/io/images/bmp/readme.txt    |     5 +
 .../libs/gil/test/extension/io/images/bmp/test.bmp |   Bin 0 -> 1800054 bytes
 .../extension/io/images/jpeg/EddDawson/36dpi.jpg   |   Bin 0 -> 5878 bytes
 .../gil/test/extension/io/images/jpeg/test.jpg     |   Bin 0 -> 19577 bytes
 .../extension/io/images/png/EddDawson/36dpi.png    |   Bin 0 -> 7406 bytes
 .../extension/io/images/png/PngSuite/readme.txt    |     7 +
 .../extension/io/images/png/PngSuite/tbbn0g04.png  |   Bin 0 -> 429 bytes
 .../extension/io/images/png/PngSuite/tbbn2c16.png  |   Bin 0 -> 2041 bytes
 .../extension/io/images/png/PngSuite/tbbn3p08.png  |   Bin 0 -> 1499 bytes
 .../extension/io/images/png/PngSuite/tbgn2c16.png  |   Bin 0 -> 2041 bytes
 .../extension/io/images/png/PngSuite/tbgn3p08.png  |   Bin 0 -> 1499 bytes
 .../extension/io/images/png/PngSuite/tbrn2c08.png  |   Bin 0 -> 1633 bytes
 .../extension/io/images/png/PngSuite/tbwn0g16.png  |   Bin 0 -> 1313 bytes
 .../extension/io/images/png/PngSuite/tm3n3p02.png  |   Bin 0 -> 116 bytes
 .../extension/io/images/png/PngSuite/tp1n3p08.png  |   Bin 0 -> 1483 bytes
 .../io/images/png/grayalpha-with-tRNS-chunk.png    |   Bin 0 -> 1190 bytes
 .../io/images/png/grayscale-with-tRNS-chunk.png    |   Bin 0 -> 11864 bytes
 .../libs/gil/test/extension/io/images/png/test.png |   Bin 0 -> 52753 bytes
 .../libs/gil/test/extension/io/images/pnm/p1.pnm   |  1203 ++
 .../libs/gil/test/extension/io/images/pnm/p2.pnm   |  3004 ++++
 .../libs/gil/test/extension/io/images/pnm/p3.pnm   | 16388 +++++++++++++++++++
 .../libs/gil/test/extension/io/images/pnm/p4.pnm   |   Bin 0 -> 5016 bytes
 .../libs/gil/test/extension/io/images/pnm/p5.pnm   |   Bin 0 -> 40024 bytes
 .../libs/gil/test/extension/io/images/pnm/p6.pnm   |   Bin 0 -> 196623 bytes
 .../gil/test/extension/io/images/pnm/readme.txt    |     5 +
 .../libs/gil/test/extension/io/images/pnm/rgb.pnm  |   Bin 0 -> 196623 bytes
 .../extension/io/images/raw/RAW_CANON_D30_SRGB.CRW |   Bin 0 -> 3120810 bytes
 .../gil/test/extension/io/images/raw/readme.txt    |     5 +
 .../libs/gil/test/extension/io/images/readme.md    |     3 +
 .../extension/io/images/targa/24BPP_compressed.tga |   Bin 0 -> 4185 bytes
 .../io/images/targa/24BPP_compressed_ul_origin.tga |   Bin 0 -> 4211 bytes
 .../io/images/targa/24BPP_uncompressed.tga         |   Bin 0 -> 46146 bytes
 .../images/targa/24BPP_uncompressed_ul_origin.tga  |   Bin 0 -> 46172 bytes
 .../extension/io/images/targa/32BPP_compressed.tga |   Bin 0 -> 4894 bytes
 .../io/images/targa/32BPP_compressed_ul_origin.tga |   Bin 0 -> 4920 bytes
 .../io/images/targa/32BPP_uncompressed.tga         |   Bin 0 -> 61522 bytes
 .../images/targa/32BPP_uncompressed_ul_origin.tga  |   Bin 0 -> 61548 bytes
 .../io/images/targa/fileformat_info/readme.txt     |     5 +
 .../io/images/tiff/graphicmagick/readme.txt        |     7 +
 .../extension/io/images/tiff/libtiffpic/readme.txt |     7 +
 .../gil/test/extension/io/images/tiff/test.tif     |   Bin 0 -> 78434 bytes
 src/boost/libs/gil/test/extension/io/jpeg/Jamfile  |    29 +
 .../gil/test/extension/io/jpeg/jpeg_old_test.cpp   |   101 +
 .../gil/test/extension/io/jpeg/jpeg_read_test.cpp  |   106 +
 .../libs/gil/test/extension/io/jpeg/jpeg_test.cpp  |   274 +
 .../gil/test/extension/io/jpeg/jpeg_write_test.cpp |    81 +
 .../libs/gil/test/extension/io/mandel_view.hpp     |   103 +
 src/boost/libs/gil/test/extension/io/paths.hpp     |    69 +
 src/boost/libs/gil/test/extension/io/png/Jamfile   |    32 +
 .../test/extension/io/png/png_file_format_test.cpp |    71 +
 .../gil/test/extension/io/png/png_old_test.cpp     |   101 +
 .../gil/test/extension/io/png/png_read_test.cpp    |   764 +
 .../libs/gil/test/extension/io/png/png_test.cpp    |   302 +
 .../gil/test/extension/io/png/png_write_test.cpp   |    33 +
 src/boost/libs/gil/test/extension/io/pnm/Jamfile   |    26 +
 .../gil/test/extension/io/pnm/pnm_old_test.cpp     |    96 +
 .../gil/test/extension/io/pnm/pnm_read_test.cpp    |   124 +
 .../libs/gil/test/extension/io/pnm/pnm_test.cpp    |   240 +
 .../gil/test/extension/io/pnm/pnm_write_test.cpp   |    60 +
 src/boost/libs/gil/test/extension/io/raw/Jamfile   |    24 +
 .../libs/gil/test/extension/io/raw/raw_test.cpp    |   127 +
 .../gil/test/extension/io/scanline_read_test.hpp   |    61 +
 .../gil/test/extension/io/simple_all_formats.cpp   |    94 +
 .../libs/gil/test/extension/io/subimage_test.hpp   |    30 +
 src/boost/libs/gil/test/extension/io/targa/Jamfile |    22 +
 .../gil/test/extension/io/targa/targa_old_test.cpp |    92 +
 .../test/extension/io/targa/targa_read_test.cpp    |   213 +
 .../gil/test/extension/io/targa/targa_test.cpp     |   283 +
 .../test/extension/io/targa/targa_write_test.cpp   |    50 +
 src/boost/libs/gil/test/extension/io/tiff/Jamfile  |    54 +
 .../extension/io/tiff/tiff_file_format_test.cpp    |   637 +
 .../gil/test/extension/io/tiff/tiff_old_test.cpp   |    93 +
 .../test/extension/io/tiff/tiff_subimage_test.cpp  |   128 +
 .../libs/gil/test/extension/io/tiff/tiff_test.cpp  |   306 +
 .../extension/io/tiff/tiff_tiled_float_test.cpp    |   111 +
 .../io/tiff/tiff_tiled_minisblack_test_1-10.cpp    |    47 +
 .../io/tiff/tiff_tiled_minisblack_test_11-20.cpp   |    48 +
 .../tiff_tiled_minisblack_test_21-31_32-64.cpp     |    64 +
 .../tiff/tiff_tiled_minisblack_write_test_1-10.cpp |    56 +
 .../tiff_tiled_minisblack_write_test_11-20.cpp     |    54 +
 ...iff_tiled_minisblack_write_test_21-31_32-64.cpp |    79 +
 .../io/tiff/tiff_tiled_palette_test_1-8.cpp        |    31 +
 .../io/tiff/tiff_tiled_palette_test_8-16.cpp       |    31 +
 .../io/tiff/tiff_tiled_palette_write_test_1-8.cpp  |    31 +
 .../io/tiff/tiff_tiled_palette_write_test_8-16.cpp |    31 +
 .../extension/io/tiff/tiff_tiled_read_macros.hpp   |   114 +
 .../io/tiff/tiff_tiled_rgb_contig_test_1-10.cpp    |    48 +
 .../io/tiff/tiff_tiled_rgb_contig_test_11-20.cpp   |    49 +
 .../tiff_tiled_rgb_contig_test_21-31_32_64.cpp     |    65 +
 .../tiff/tiff_tiled_rgb_contig_write_test_1-10.cpp |    59 +
 .../tiff_tiled_rgb_contig_write_test_11-20.cpp     |    59 +
 ...iff_tiled_rgb_contig_write_test_21-31_32_64.cpp |    86 +
 .../io/tiff/tiff_tiled_rgb_planar_test_1-10.cpp    |    49 +
 .../io/tiff/tiff_tiled_rgb_planar_test_11-20.cpp   |    48 +
 .../tiff_tiled_rgb_planar_test_21-31_32_64.cpp     |    65 +
 .../gil/test/extension/io/tiff/tiff_tiled_test.cpp |    84 +
 .../extension/io/tiff/tiff_tiled_write_macros.hpp  |   177 +
 .../gil/test/extension/io/tiff/tiff_write_test.cpp |    31 +
 .../libs/gil/test/extension/numeric/CMakeLists.txt |    39 +
 src/boost/libs/gil/test/extension/numeric/Jamfile  |    28 +
 .../numeric/channel_numeric_operations.cpp         |   484 +
 .../libs/gil/test/extension/numeric/convolve.cpp   |   121 +
 .../gil/test/extension/numeric/convolve_2d.cpp     |    68 +
 .../gil/test/extension/numeric/convolve_cols.cpp   |    73 +
 .../gil/test/extension/numeric/convolve_rows.cpp   |    73 +
 .../gil/test/extension/numeric/extend_boundary.cpp |   252 +
 .../libs/gil/test/extension/numeric/kernel.cpp     |   174 +
 .../numeric/kernel_1d_fixed_even_size_fail.cpp     |    16 +
 .../gil/test/extension/numeric/kernel_fixed.cpp    |   183 +
 .../libs/gil/test/extension/numeric/matrix3x2.cpp  |   191 +
 .../extension/numeric/pixel_numeric_operations.cpp |   343 +
 .../numeric/pixel_numeric_operations_float.cpp     |    97 +
 .../libs/gil/test/extension/numeric/resample.cpp   |   103 +
 .../gil/test/extension/numeric/test_fixture.hpp    |    30 +
 .../libs/gil/test/extension/toolbox/CMakeLists.txt |    64 +
 src/boost/libs/gil/test/extension/toolbox/Jamfile  |    33 +
 .../gil/test/extension/toolbox/channel_type.cpp    |    42 +
 .../gil/test/extension/toolbox/channel_view.cpp    |    44 +
 .../test/extension/toolbox/color_convert_cmyka.cpp |    32 +
 .../test/extension/toolbox/color_convert_gray.cpp  |    30 +
 .../extension/toolbox/color_convert_gray_alpha.cpp |    49 +
 .../test/extension/toolbox/color_convert_hsl.cpp   |    87 +
 .../test/extension/toolbox/color_convert_hsv.cpp   |    95 +
 .../test/extension/toolbox/color_convert_lab.cpp   |   140 +
 .../extension/toolbox/color_convert_luminance.cpp  |    38 +
 .../test/extension/toolbox/color_convert_xyz.cpp   |   219 +
 .../gil/test/extension/toolbox/get_num_bits.cpp    |    41 +
 .../gil/test/extension/toolbox/get_pixel_type.cpp  |    39 +
 .../gil/test/extension/toolbox/indexed_image.cpp   |   154 +
 .../gil/test/extension/toolbox/is_bit_aligned.cpp  |    24 +
 .../gil/test/extension/toolbox/is_homogeneous.cpp  |    26 +
 .../gil/test/extension/toolbox/pixel_bit_size.cpp  |    26 +
 .../gil/test/extension/toolbox/subchroma_image.cpp |   106 +
 src/boost/libs/gil/test/header/CMakeLists.txt      |   106 +
 src/boost/libs/gil/test/header/main.cpp            |    19 +
 src/boost/libs/gil/test/legacy/CMakeLists.txt      |    64 +
 src/boost/libs/gil/test/legacy/Jamfile             |    26 +
 src/boost/libs/gil/test/legacy/README.md           |    16 +
 src/boost/libs/gil/test/legacy/channel.cpp         |   408 +
 src/boost/libs/gil/test/legacy/error_if.cpp        |    13 +
 .../gil/test/legacy/gil_reference_checksums.txt    |   125 +
 src/boost/libs/gil/test/legacy/image.cpp           |   612 +
 src/boost/libs/gil/test/legacy/performance.cpp     |   520 +
 src/boost/libs/gil/test/legacy/pixel.cpp           |   322 +
 src/boost/libs/gil/test/legacy/pixel_iterator.cpp  |   355 +
 src/boost/libs/gil/test/legacy/recreate_image.cpp  |   108 +
 src/boost/libs/gil/test/legacy/sample_image.cpp    |   159 +
 .../libs/gil/test/test_utility_output_stream.cpp   |    68 +
 .../libs/gil/test/test_utility_output_stream.hpp   |   133 +
 298 files changed, 44399 insertions(+)
 create mode 100644 src/boost/libs/gil/test/CMakeLists.txt
 create mode 100644 src/boost/libs/gil/test/Jamfile
 create mode 100644 src/boost/libs/gil/test/core/CMakeLists.txt
 create mode 100644 src/boost/libs/gil/test/core/Jamfile
 create mode 100644 src/boost/libs/gil/test/core/algorithm/CMakeLists.txt
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 create mode 100644 src/boost/libs/gil/test/extension/toolbox/pixel_bit_size.cpp
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 create mode 100644 src/boost/libs/gil/test/header/CMakeLists.txt
 create mode 100644 src/boost/libs/gil/test/header/main.cpp
 create mode 100644 src/boost/libs/gil/test/legacy/CMakeLists.txt
 create mode 100644 src/boost/libs/gil/test/legacy/Jamfile
 create mode 100644 src/boost/libs/gil/test/legacy/README.md
 create mode 100644 src/boost/libs/gil/test/legacy/channel.cpp
 create mode 100644 src/boost/libs/gil/test/legacy/error_if.cpp
 create mode 100644 src/boost/libs/gil/test/legacy/gil_reference_checksums.txt
 create mode 100644 src/boost/libs/gil/test/legacy/image.cpp
 create mode 100644 src/boost/libs/gil/test/legacy/performance.cpp
 create mode 100644 src/boost/libs/gil/test/legacy/pixel.cpp
 create mode 100644 src/boost/libs/gil/test/legacy/pixel_iterator.cpp
 create mode 100644 src/boost/libs/gil/test/legacy/recreate_image.cpp
 create mode 100644 src/boost/libs/gil/test/legacy/sample_image.cpp
 create mode 100644 src/boost/libs/gil/test/test_utility_output_stream.cpp
 create mode 100644 src/boost/libs/gil/test/test_utility_output_stream.hpp

(limited to 'src/boost/libs/gil/test')

diff --git a/src/boost/libs/gil/test/CMakeLists.txt b/src/boost/libs/gil/test/CMakeLists.txt
new file mode 100644
index 000000000..acdf1e82b
--- /dev/null
+++ b/src/boost/libs/gil/test/CMakeLists.txt
@@ -0,0 +1,38 @@
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+
+foreach(_name
+  test_utility_output_stream)
+  set(_test t_utility_${_name})
+  set(_target test_utility_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
+
+add_subdirectory(core)
+
+add_subdirectory(legacy)
+
+add_subdirectory(extension)
+
+# TODO: Split headers tests into core and extensions, see Jamfile-s
+# if(BOOST_GIL_BUILD_HEADERS_TESTS)
+#   add_subdirectory(headers)
+# endif()
diff --git a/src/boost/libs/gil/test/Jamfile b/src/boost/libs/gil/test/Jamfile
new file mode 100644
index 000000000..cfca2f443
--- /dev/null
+++ b/src/boost/libs/gil/test/Jamfile
@@ -0,0 +1,134 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
+# Copyright (c) 2018-2019 Mateusz Loskot <mateusz@loskot.net>
+# Copyright (c) 2018 Dmitry Arkhipov
+# Copyright (c) 2007-2015 Andrey Semashev
+#
+# Use, modification and distribution is subject to the Boost Software License,
+# Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+import ../../config/checks/config : requires ;
+import os ;
+import path ;
+import regex ;
+import sequence ;
+import testing ;
+
+# Avoid warnings flood on Travis CI, AppVeyor, CircleCI, Azure Pipelines, GitHub Actions
+if ! [ os.environ CI ] && ! [ os.environ AGENT_JOBSTATUS ] && ! [ os.environ GITHUB_ACTIONS ]
+{
+  DEVELOPMENT_EXTRA_WARNINGS =
+    <toolset>msvc:<cxxflags>"-W4"
+    <toolset>gcc:<cxxflags>"-pedantic -Wextra -Wcast-align -Wconversion -Wfloat-equal -Wshadow -Wsign-promo -Wstrict-aliasing -Wunused-parameter"
+    <toolset>clang,<variant>debug:<cxxflags>"-pedantic -Wextra -Wcast-align -Wconversion -Wfloat-equal -Wshadow -Wsign-promo -Wstrict-aliasing -Wunused-parameter -Wsign-conversion"
+    <toolset>clang,<variant>release:<cxxflags>"-pedantic -Wextra -Wcast-align -Wconversion -Wfloat-equal -Wshadow -Wsign-promo -Wstrict-aliasing -Wunused-parameter -Wsign-conversion"
+    <toolset>darwin:<cxxflags>"-pedantic -Wextra -Wcast-align -Wconversion -Wfloat-equal -Wshadow -Wsign-promo -Wstrict-aliasing -Wunused-parameter"
+    ;
+}
+else
+{
+  DEVELOPMENT_EXTRA_WARNINGS =
+    <toolset>msvc:<cxxflags>"-W1"
+    ;
+}
+
+project
+  :
+  requirements
+    <include>.
+    # TODO: Enable concepts check for all, not just test/core
+    #<define>BOOST_GIL_USE_CONCEPT_CHECK=1
+    <toolset>msvc:<cxxflags>"-bigobj"
+    <toolset>msvc:<asynch-exceptions>on
+    <toolset>msvc:<define>_SCL_SECURE_NO_DEPRECATE
+    <toolset>msvc:<define>_CRT_SECURE_NO_WARNINGS
+    <toolset>msvc:<define>_CRT_NONSTDC_NO_DEPRECATE
+    <toolset>msvc:<define>NOMINMAX
+    <toolset>intel:<debug-symbols>off
+    <toolset>gcc:<cxxflags>"-fstrict-aliasing"
+    <toolset>darwin:<cxxflags>"-fstrict-aliasing"
+    # variant filter for clang is necessary to allow ubsan_*
+    # custom variants declare distinct set of <cxxflags>
+    <toolset>clang,<variant>debug:<cxxflags>"-fstrict-aliasing"
+    <toolset>clang,<variant>release:<cxxflags>"-fstrict-aliasing"
+    $(DEVELOPMENT_EXTRA_WARNINGS)
+    [ requires
+        cxx11_constexpr
+        cxx11_defaulted_functions
+        cxx11_template_aliases
+        cxx11_trailing_result_types  # implies decltype and auto
+        cxx11_variadic_templates
+    ]
+  ;
+
+variant gil_ubsan_integer
+    : release
+    :
+    <cxxflags>"-Wno-unused -fstrict-aliasing -fno-omit-frame-pointer -fsanitize=integer -fno-sanitize-recover=integer -fsanitize-blacklist=libs/gil/.ci/blacklist.supp"
+    <linkflags>"-fsanitize=integer"
+    <debug-symbols>on
+    <define>BOOST_USE_ASAN=1
+    ;
+
+variant gil_ubsan_nullability
+    : release
+    :
+    <cxxflags>"-Wno-unused -fstrict-aliasing -fno-omit-frame-pointer -fsanitize=nullability -fno-sanitize-recover=nullability -fsanitize-blacklist=libs/gil/.ci/blacklist.supp"
+    <linkflags>"-fsanitize=nullability"
+    <debug-symbols>on
+    <define>BOOST_USE_ASAN=1
+    ;
+
+variant gil_ubsan_undefined
+    : release
+    :
+    <cxxflags>"-Wno-unused -fstrict-aliasing -fno-omit-frame-pointer -fsanitize=undefined -fno-sanitize-recover=undefined -fsanitize-blacklist=libs/gil/.ci/blacklist.supp"
+    <linkflags>"-fsanitize=undefined"
+    <debug-symbols>on
+    <define>BOOST_USE_ASAN=1
+    ;
+
+rule generate_self_contained_headers ( headers_subpath * : exclude_subpaths * )
+{
+    # On CI services, test the self-contained headers on-demand only to avoid build timeouts
+    # CI environment is common for Travis CI, AppVeyor, CircleCI, etc.
+    # For example:
+    # if ! [ os.environ CI ] || [ os.environ TEST_HEADERS ] {
+    #    alias self_contained_headers : [ generate_self_contained_headers ] ;
+    # }
+
+    local targets ;
+
+    # NOTE: All '/' in test names are replaced with '-' because apparently
+    #       test scripts have a problem with test names containing slashes.
+
+    local top_headers_path = [ path.make $(BOOST_ROOT)/libs/gil/include/boost/gil ] ;
+    local headers_path = $(top_headers_path) ;
+    if $(headers_subpath)
+    {
+        headers_path = $(top_headers_path)/$(headers_subpath) ;
+    }
+
+    for local file in [ path.glob-tree $(headers_path) : *.hpp : $(exclude_subpaths) ]
+    {
+        local target_no = [ sequence.length $(targets) ] ;
+        local rel_file = [ path.relative-to $(top_headers_path) $(file) ] ;
+        local target_name = [ regex.replace h/$(target_no)/$(rel_file) "/" "-" ] ;
+        local target_name = [ regex.replace $(target_name) "\.hpp" "" ] ;
+        targets += [
+            compile $(BOOST_ROOT)/libs/gil/test/header/main.cpp
+            : <define>"BOOST_GIL_TEST_HEADER=$(rel_file)" <dependency>$(file)
+            : $(target_name)
+        ] ;
+    }
+
+    return $(targets) ;
+}
+
+run test_utility_output_stream.cpp ;
+
+build-project core ;
+build-project legacy ;
+build-project extension ;
diff --git a/src/boost/libs/gil/test/core/CMakeLists.txt b/src/boost/libs/gil/test/core/CMakeLists.txt
new file mode 100644
index 000000000..ed3b36f49
--- /dev/null
+++ b/src/boost/libs/gil/test/core/CMakeLists.txt
@@ -0,0 +1,41 @@
+#
+# Copyright (c) 2017-2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+message(STATUS "Boost.GIL: Configuring tests in test/core")
+
+foreach(_name
+  promote_integral
+  test_fixture)
+  set(_test t_utility_${_name})
+  set(_target test_utility_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
+
+add_subdirectory(point)
+add_subdirectory(channel)
+add_subdirectory(color)
+add_subdirectory(color_base)
+add_subdirectory(pixel)
+add_subdirectory(iterator)
+add_subdirectory(locator)
+add_subdirectory(image)
+add_subdirectory(image_view)
+add_subdirectory(algorithm)
+add_subdirectory(image_processing)
diff --git a/src/boost/libs/gil/test/core/Jamfile b/src/boost/libs/gil/test/core/Jamfile
new file mode 100644
index 000000000..7ced83833
--- /dev/null
+++ b/src/boost/libs/gil/test/core/Jamfile
@@ -0,0 +1,34 @@
+# Boost.GIL (Generic Image Library) - core tests
+#
+# Copyright (c) 2008 Lubomir Bourdev, Hailin Jin
+# Copyright (c) 2018-2019 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+project
+  :
+  requirements
+    <define>BOOST_GIL_USE_CONCEPT_CHECK=1
+  ;
+
+alias headers_concepts : [ generate_self_contained_headers concepts ] ;
+alias headers : [ generate_self_contained_headers : concepts extension io ] ;
+
+run promote_integral.cpp ;
+run test_fixture.cpp ;
+
+build-project point ;
+build-project channel ;
+build-project color ;
+build-project color_base ;
+build-project pixel ;
+build-project iterator ;
+build-project locator ;
+build-project image ;
+build-project image_view ;
+build-project algorithm ;
+build-project image_processing ;
diff --git a/src/boost/libs/gil/test/core/algorithm/CMakeLists.txt b/src/boost/libs/gil/test/core/algorithm/CMakeLists.txt
new file mode 100644
index 000000000..688bd93e1
--- /dev/null
+++ b/src/boost/libs/gil/test/core/algorithm/CMakeLists.txt
@@ -0,0 +1,27 @@
+#
+# Copyright (c) 2018 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+foreach(_name
+  for_each_pixel
+  std_fill
+  std_uninitialized_fill)
+  set(_test t_core_algorithm_${_name})
+  set(_target test_core_algorithm_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/core/algorithm/Jamfile b/src/boost/libs/gil/test/core/algorithm/Jamfile
new file mode 100644
index 000000000..8510c8009
--- /dev/null
+++ b/src/boost/libs/gil/test/core/algorithm/Jamfile
@@ -0,0 +1,13 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright (c) 2018-2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+run for_each_pixel.cpp ;
+run std_fill.cpp ;
+run std_uninitialized_fill.cpp ;
diff --git a/src/boost/libs/gil/test/core/algorithm/for_each_pixel.cpp b/src/boost/libs/gil/test/core/algorithm/for_each_pixel.cpp
new file mode 100644
index 000000000..5490b27f3
--- /dev/null
+++ b/src/boost/libs/gil/test/core/algorithm/for_each_pixel.cpp
@@ -0,0 +1,34 @@
+//
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/algorithm.hpp>
+#include <boost/gil/image.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+void test_lambda_expression()
+{
+    gil::gray8_pixel_t const gray128(128);
+    gil::gray8_image_t image(2, 2, gray128);
+
+    int sum{0};
+    gil::for_each_pixel(gil::view(image), [&sum](gil::gray8_pixel_t& p) {
+        sum += gil::at_c<0>(p);
+    });
+    BOOST_TEST_EQ(sum, 2 * 2 * 128);
+}
+
+int main()
+{
+    test_lambda_expression();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/algorithm/std_fill.cpp b/src/boost/libs/gil/test/core/algorithm/std_fill.cpp
new file mode 100644
index 000000000..067b6babd
--- /dev/null
+++ b/src/boost/libs/gil/test/core/algorithm/std_fill.cpp
@@ -0,0 +1,55 @@
+//
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifdef BOOST_GIL_USE_CONCEPT_CHECK
+// FIXME: Range as pixel does not seem to fulfill pixel concepts due to no specializations required:
+//        pixel.hpp(50) : error C2039 : 'type' : is not a member of 'boost::gil::color_space_type<P>
+#undef BOOST_GIL_USE_CONCEPT_CHECK
+#endif
+#include <boost/gil/algorithm.hpp>
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_view.hpp>
+
+#include <boost/array.hpp>
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include <array>
+#include <cstdint>
+
+namespace gil = boost::gil;
+
+using array_pixel_types = ::boost::mp11::mp_list
+<
+    boost::array<int, 2>,
+    std::array<int, 2>
+>;
+
+struct test_array_as_pixel
+{
+    template <typename Pixel>
+    void operator()(Pixel const&)
+    {
+        using pixel_t = Pixel;
+        gil::image<pixel_t> img(1, 1);
+        std::fill(gil::view(img).begin(), gil::view(img).end(), pixel_t{0, 1});
+        auto a = *gil::view(img).at(0, 0);
+        auto e = pixel_t{0, 1};
+        BOOST_TEST(a == e);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<array_pixel_types>(test_array_as_pixel{});
+    }
+};
+
+int main()
+{
+    test_array_as_pixel::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/algorithm/std_uninitialized_fill.cpp b/src/boost/libs/gil/test/core/algorithm/std_uninitialized_fill.cpp
new file mode 100644
index 000000000..c308f4775
--- /dev/null
+++ b/src/boost/libs/gil/test/core/algorithm/std_uninitialized_fill.cpp
@@ -0,0 +1,223 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include <memory>
+#include <random>
+#include <type_traits>
+#include <vector>
+
+#include "test_utility_output_stream.hpp"
+#include "core/channel/test_fixture.hpp"
+#include "core/image/test_fixture.hpp"
+#include "core/pixel/test_fixture.hpp"
+
+namespace boost { namespace gil { namespace test { namespace fixture {
+
+template <typename Pixel>
+struct pixel_array
+{
+    using iterator = Pixel*;
+#ifdef NDEBUG
+    constexpr static std::size_t default_x_size = 256;
+    constexpr static std::size_t default_y_size = 128;
+#else
+    constexpr static std::size_t default_x_size = 16;
+    constexpr static std::size_t default_y_size = 8;
+#endif
+
+    pixel_array(std::size_t x_size = default_x_size, std::size_t y_size = default_y_size)
+        : pixels_(new Pixel[x_size * y_size])
+        , x_size_(x_size)
+        , y_size_(y_size)
+    {}
+
+    auto begin() -> iterator { return pixels_.get(); }
+    auto end() -> iterator { return pixels_.get() + x_size_ * y_size_; }
+
+private:
+    std::unique_ptr<Pixel[]> pixels_;
+    std::size_t x_size_;
+    std::size_t y_size_;
+};
+
+}}}}
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+struct fill_with_pixel_integer_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const &)
+    {
+        using pixel_t = Pixel;
+        auto min_pixel = fixture::pixel_generator<pixel_t>::min();
+        auto max_pixel = fixture::pixel_generator<pixel_t>::max();
+        auto rnd_pixel = fixture::pixel_generator<pixel_t>::random();
+
+        for (auto const &fill_pixel : {min_pixel, max_pixel, rnd_pixel})
+        {
+            fixture::pixel_array<pixel_t> pixels;
+            std::uninitialized_fill(pixels.begin(), pixels.end(), fill_pixel);
+
+            for (pixel_t const &p : pixels)
+                BOOST_TEST_EQ(p, fill_pixel);
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_integer_types>(fill_with_pixel_integer_types{});
+    }
+};
+
+struct fill_with_pixel_float_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const &)
+    {
+        using pixel_t = Pixel;
+        auto min_pixel = fixture::pixel_generator<pixel_t>::min();
+        auto max_pixel = fixture::pixel_generator<pixel_t>::max();
+
+        for (auto const &fill_pixel : {min_pixel, max_pixel})
+        {
+            fixture::pixel_array<Pixel> pixels;
+            std::uninitialized_fill(pixels.begin(), pixels.end(), fill_pixel);
+
+            for (Pixel const &p : pixels)
+                BOOST_TEST_EQ(p, fill_pixel);
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_float_types>(fill_with_pixel_float_types{});
+    }
+};
+
+void
+test_fill_with_packed_pixel_gray3()
+{
+    auto min_pixel = fixture::packed_pixel_gray3{0};
+    auto mid_pixel = fixture::packed_pixel_gray3{3};
+    auto max_pixel = fixture::packed_pixel_gray3{7};
+
+    for (auto const& fill_pixel : {min_pixel, max_pixel, mid_pixel} )
+    {
+        fixture::pixel_array<fixture::packed_pixel_gray3> pixels;
+        std::uninitialized_fill(pixels.begin(), pixels.end(), fill_pixel);
+
+        for (fixture::packed_pixel_gray3 const& p : pixels)
+        {
+            BOOST_TEST_EQ(p, fill_pixel);
+            BOOST_TEST_EQ((int)get_color(p, gil::gray_color_t()), (int)get_color(fill_pixel, gil::gray_color_t()));
+        }
+    }
+}
+
+void test_fill_with_packed_pixel_bgr121()
+{
+    auto min_pixel = fixture::packed_pixel_bgr121{0};
+    auto mid_pixel = fixture::packed_pixel_bgr121{8};
+    auto max_pixel = fixture::packed_pixel_bgr121{17};
+
+    for (auto const& fill_pixel : {min_pixel, max_pixel, mid_pixel} )
+    {
+        fixture::pixel_array<fixture::packed_pixel_bgr121> pixels;
+        std::uninitialized_fill(pixels.begin(), pixels.end(), fill_pixel);
+
+        for (fixture::packed_pixel_bgr121 const& p : pixels)
+        {
+            BOOST_TEST_EQ(p, fill_pixel);
+            BOOST_TEST_EQ((int)get_color(p, gil::red_t()), (int)get_color(fill_pixel, gil::red_t()));
+            BOOST_TEST_EQ((int)get_color(p, gil::green_t()), (int)get_color(fill_pixel, gil::green_t()));
+            BOOST_TEST_EQ((int)get_color(p, gil::blue_t()), (int)get_color(fill_pixel, gil::blue_t()));
+        }
+    }
+}
+
+void test_fill_with_packed_pixel_rgb535()
+{
+    fixture::packed_pixel_rgb535 min_pixel(0, 0, 0);
+    fixture::packed_pixel_rgb535 mid_pixel(15, 3, 15);
+    fixture::packed_pixel_rgb535 max_pixel(31, 7, 31);
+
+    for (auto const& fill_pixel : {min_pixel, max_pixel, mid_pixel} )
+    {
+        fixture::pixel_array<fixture::packed_pixel_rgb535> pixels;
+        std::uninitialized_fill(pixels.begin(), pixels.end(), fill_pixel);
+
+        for (fixture::packed_pixel_rgb535 const& p : pixels)
+        {
+            BOOST_TEST_EQ(p, fill_pixel);
+            BOOST_TEST_EQ((int)get_color(p, gil::red_t()), (int)get_color(fill_pixel, gil::red_t()));
+            BOOST_TEST_EQ((int)get_color(p, gil::green_t()), (int)get_color(fill_pixel, gil::green_t()));
+            BOOST_TEST_EQ((int)get_color(p, gil::blue_t()), (int)get_color(fill_pixel, gil::blue_t()));
+        }
+    }
+}
+
+void test_bit_aligned_pixel_bgr232()
+{
+    fixture::bit_aligned_pixel_bgr232 min_pixel(0, 0, 0);
+    fixture::bit_aligned_pixel_bgr232 mid_pixel(1, 4, 2);
+    fixture::bit_aligned_pixel_bgr232 max_pixel(3, 7, 3);
+
+    for (auto const& fill_pixel : {min_pixel, max_pixel, mid_pixel} )
+    {
+        fixture::pixel_array<fixture::bit_aligned_pixel_bgr232> pixels;
+        std::uninitialized_fill(pixels.begin(), pixels.end(), fill_pixel);
+
+        for (fixture::bit_aligned_pixel_bgr232 const& p : pixels)
+        {
+            BOOST_TEST_EQ(p, fill_pixel);
+            BOOST_TEST_EQ((int)get_color(p, gil::red_t()), (int)get_color(fill_pixel, gil::red_t()));
+            BOOST_TEST_EQ((int)get_color(p, gil::green_t()), (int)get_color(fill_pixel, gil::green_t()));
+            BOOST_TEST_EQ((int)get_color(p, gil::blue_t()), (int)get_color(fill_pixel, gil::blue_t()));
+        }
+    }
+}
+
+void test_bit_aligned_pixel_rgb567()
+{
+    fixture::bit_aligned_pixel_rgb567 min_pixel(0, 0, 0);
+    fixture::bit_aligned_pixel_rgb567 mid_pixel(15, 31, 63);
+    fixture::bit_aligned_pixel_rgb567 max_pixel(31, 63, 127);
+
+    for (auto const& fill_pixel : {min_pixel, max_pixel, mid_pixel} )
+    {
+        fixture::pixel_array<fixture::bit_aligned_pixel_rgb567> pixels;
+        std::uninitialized_fill(pixels.begin(), pixels.end(), fill_pixel);
+
+        for (fixture::bit_aligned_pixel_rgb567 const& p : pixels)
+        {
+            BOOST_TEST_EQ(p, fill_pixel);
+            BOOST_TEST_EQ((int)get_color(p, gil::red_t()), (int)get_color(fill_pixel, gil::red_t()));
+            BOOST_TEST_EQ((int)get_color(p, gil::green_t()), (int)get_color(fill_pixel, gil::green_t()));
+            BOOST_TEST_EQ((int)get_color(p, gil::blue_t()), (int)get_color(fill_pixel, gil::blue_t()));
+        }
+    }
+}
+
+int main()
+{
+    fill_with_pixel_integer_types::run();
+    fill_with_pixel_float_types::run();
+
+    test_fill_with_packed_pixel_gray3();
+    test_fill_with_packed_pixel_bgr121();
+    test_fill_with_packed_pixel_rgb535();
+
+    test_bit_aligned_pixel_bgr232();
+    test_bit_aligned_pixel_rgb567();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/channel/CMakeLists.txt b/src/boost/libs/gil/test/core/channel/CMakeLists.txt
new file mode 100644
index 000000000..365a8274f
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/CMakeLists.txt
@@ -0,0 +1,35 @@
+#
+# Copyright (c) 2018 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+foreach(_name
+  algorithm_channel_arithmetic
+  algorithm_channel_convert
+  algorithm_channel_invert
+  algorithm_channel_multiply
+  algorithm_channel_relation
+  channel_traits
+  concepts
+  is_channel_integral
+  packed_channel_value
+  scoped_channel_value
+  test_fixture)
+  set(_test t_core_channel_${_name})
+  set(_target test_core_channel_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+endforeach()
diff --git a/src/boost/libs/gil/test/core/channel/Jamfile b/src/boost/libs/gil/test/core/channel/Jamfile
new file mode 100644
index 000000000..9e6b65027
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/Jamfile
@@ -0,0 +1,23 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright (c) 2018-2020 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+compile is_channel_integral.cpp ;
+
+run concepts.cpp ;
+run channel_traits.cpp ;
+run test_fixture.cpp ;
+run packed_channel_value.cpp ;
+run scoped_channel_value.cpp ;
+
+run algorithm_channel_arithmetic.cpp ;
+run algorithm_channel_convert.cpp ;
+run algorithm_channel_invert.cpp ;
+run algorithm_channel_multiply.cpp ;
+run algorithm_channel_relation.cpp ;
diff --git a/src/boost/libs/gil/test/core/channel/TODO.md b/src/boost/libs/gil/test/core/channel/TODO.md
new file mode 100644
index 000000000..7a2604052
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/TODO.md
@@ -0,0 +1,10 @@
+# Channel TODO
+
+Issues and questions related to implementation, testing, etc. of channel:
+
+- Provide algorithm performance overloads for scoped channel and packed channels
+- Update concepts and documentation
+- What to do about pointer types?!
+- Performance!!
+- Is channel_convert the same as native?
+- Is operator++ on float32_t the same as native? How about if operator++ is defined in scoped_channel to do _value++?
diff --git a/src/boost/libs/gil/test/core/channel/algorithm_channel_arithmetic.cpp b/src/boost/libs/gil/test/core/channel/algorithm_channel_arithmetic.cpp
new file mode 100644
index 000000000..ef8ec658c
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/algorithm_channel_arithmetic.cpp
@@ -0,0 +1,170 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/channel_algorithm.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <type_traits>
+#include <utility>
+
+#include "test_fixture.hpp"
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+template <typename ChannelFixtureBase>
+void test_channel_arithmetic_mutable(std::false_type)  {}
+
+template <typename ChannelFixtureBase>
+void test_channel_arithmetic_mutable(std::true_type)
+{
+    using fixture_t = fixture::channel<ChannelFixtureBase>;
+    using channel_value_t = typename fixture_t::channel_value_t;
+    fixture_t f;
+    channel_value_t const v = f.min_v_;
+    channel_value_t const one = 1;
+
+    ++f.min_v_;
+    f.min_v_++;
+    --f.min_v_;
+    f.min_v_--;
+    BOOST_TEST_EQ(v, f.min_v_);
+
+    f.min_v_ += one;
+    f.min_v_ -= one;
+    BOOST_TEST_EQ(v, f.min_v_);
+
+    f.min_v_ *= one;
+    f.min_v_ /= one;
+    BOOST_TEST_EQ(v, f.min_v_);
+
+    f.min_v_ = one; // assignable to scalar
+    BOOST_TEST_EQ(f.min_v_, one);
+    f.min_v_ = v; // and to value type
+    BOOST_TEST_EQ(f.min_v_, v);
+
+    // test swap
+    channel_value_t v1 = f.min_v_;
+    channel_value_t v2 = f.max_v_;
+    std::swap(f.min_v_, f.max_v_);
+    BOOST_TEST_GT(f.min_v_, f.max_v_);
+    channel_value_t v3 = f.min_v_;
+    channel_value_t v4 = f.max_v_;
+    BOOST_TEST_EQ(v1, v4);
+    BOOST_TEST_EQ(v2, v3);
+}
+
+template <typename ChannelFixtureBase>
+void test_channel_arithmetic()
+{
+    using fixture_t = fixture::channel<ChannelFixtureBase>;
+    fixture_t f;
+    BOOST_TEST_EQ(f.min_v_ * 1, f.min_v_);
+    BOOST_TEST_EQ(f.min_v_ / 1, f.min_v_);
+    BOOST_TEST_EQ((f.min_v_ + 1) + 1, f.min_v_ + 2);
+    BOOST_TEST_EQ((f.max_v_ - 1) - 1, f.max_v_ - 2);
+
+    using is_mutable_t = std::integral_constant
+        <
+            bool,
+            gil::channel_traits<typename fixture_t::channel_t>::is_mutable
+        >;
+    test_channel_arithmetic_mutable<ChannelFixtureBase>(is_mutable_t{});
+}
+
+struct test_channel_value
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_value<channel_t>;
+        test_channel_arithmetic<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_value{});
+    }
+};
+
+struct test_channel_reference
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_reference<channel_t &>;
+        test_channel_arithmetic<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_reference{});
+    }
+};
+
+struct test_channel_reference_const
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_reference<channel_t const &>;
+        test_channel_arithmetic<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_reference_const{});
+    }
+};
+
+struct test_packed_channel_reference
+{
+    template <typename BitField>
+    void operator()(BitField const &)
+    {
+        using bitfield_t = BitField;
+        using channels565_t = fixture::packed_channels565<bitfield_t>;
+        test_channel_arithmetic<typename channels565_t::fixture_0_5_t>();
+        test_channel_arithmetic<typename channels565_t::fixture_5_6_t>();
+        test_channel_arithmetic<typename channels565_t::fixture_11_5_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_bitfield_types>(test_packed_channel_reference{});
+    }
+};
+
+struct test_packed_dynamic_channel_reference
+{
+
+    template <typename BitField>
+    void operator()(BitField const &)
+    {
+        using bitfield_t = BitField;
+        using channels565_t = fixture::packed_dynamic_channels565<bitfield_t>;
+        test_channel_arithmetic<typename channels565_t::fixture_5_t>();
+        test_channel_arithmetic<typename channels565_t::fixture_6_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_bitfield_types>(test_packed_dynamic_channel_reference{});
+    }
+};
+
+int main()
+{
+    test_channel_value::run();
+    test_channel_reference::run();
+    test_channel_reference_const::run();
+    test_packed_channel_reference::run();
+    test_packed_dynamic_channel_reference::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/channel/algorithm_channel_convert.cpp b/src/boost/libs/gil/test/core/channel/algorithm_channel_convert.cpp
new file mode 100644
index 000000000..e39555b65
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/algorithm_channel_convert.cpp
@@ -0,0 +1,261 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/channel_algorithm.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+
+#include "test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+template <typename ChannelFixtureBase>
+struct test_convert_to
+{
+    using channel_t = typename fixture::channel<ChannelFixtureBase>::channel_t;
+    using channel_value_t = typename fixture::channel<ChannelFixtureBase>::channel_value_t;
+
+    template <typename Channel>
+    static void from(Channel src_min_v, Channel src_max_v)
+    {
+        channel_value_t min_v = gil::channel_convert<channel_t>(src_min_v);
+        channel_value_t max_v = gil::channel_convert<channel_t>(src_max_v);
+        fixture::channel_minmax_value<channel_value_t> expect;
+        BOOST_TEST_EQ(min_v, expect.min_v_);
+        BOOST_TEST_EQ(max_v, expect.max_v_);
+    }
+};
+
+//--- Test gil::channel_convert from integral channels to all byte channels -------------
+template <typename SourceChannel, typename TargetChannel>
+void test_channel_value_convert_from_integral()
+{
+    fixture::channel_minmax_value<SourceChannel> f;
+
+    using channel_t = TargetChannel;
+    // byte channel
+    test_convert_to<fixture::channel_value<channel_t>>::from(f.min_v_, f.max_v_);
+    test_convert_to<fixture::channel_reference<channel_t&>>::from(f.min_v_, f.max_v_);
+    test_convert_to<fixture::channel_reference<channel_t const&>>::from(f.min_v_, f.max_v_);
+
+    // packed_channel_reference
+    {
+        using channels565_t = fixture::packed_channels565<std::uint16_t>;
+        test_convert_to<typename channels565_t::fixture_0_5_t>::from(f.min_v_, f.max_v_);
+        test_convert_to<typename channels565_t::fixture_5_6_t>::from(f.min_v_, f.max_v_);
+        test_convert_to<typename channels565_t::fixture_11_5_t>::from(f.min_v_, f.max_v_);
+    }
+    // packed_dynamic_channel_reference
+    {
+        using channels565_t = fixture::packed_dynamic_channels565<std::uint16_t>;
+        test_convert_to<typename channels565_t::fixture_5_t>::from(f.min_v_, f.max_v_);
+        test_convert_to<typename channels565_t::fixture_6_t>::from(f.min_v_, f.max_v_);
+    }
+}
+
+struct test_channel_value_convert_from_uint8_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        test_channel_value_convert_from_integral<std::uint8_t, channel_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_value_convert_from_uint8_t{});
+    }
+};
+
+struct test_channel_value_convert_from_int8_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        test_channel_value_convert_from_integral<std::int8_t, channel_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_value_convert_from_int8_t{});
+    }
+};
+
+struct test_channel_value_convert_from_uint16_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        test_channel_value_convert_from_integral<std::uint16_t, channel_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_value_convert_from_uint16_t{});
+    }
+};
+
+struct test_channel_value_convert_from_int16_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        test_channel_value_convert_from_integral<std::int16_t, channel_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_value_convert_from_int16_t{});
+    }
+};
+
+struct test_channel_value_convert_from_uint32_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        test_channel_value_convert_from_integral<std::uint32_t, channel_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_value_convert_from_uint32_t{});
+    }
+};
+
+struct test_channel_value_convert_from_int32_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        test_channel_value_convert_from_integral<std::int32_t, channel_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_value_convert_from_int32_t{});
+    }
+};
+
+// FIXME: gil::float32_t <-> gil::float64_t seems not supported
+
+//--- Test gil::channel_convert from gil::float32_t to all integer channels -------------
+struct test_channel_value_convert_from_float32_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        fixture::channel_minmax_value<gil::float32_t> f;
+        test_convert_to<fixture::channel_value<channel_t>>::from(f.min_v_, f.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_channel_value_convert_from_float32_t{});
+    }
+};
+
+struct test_channel_reference_convert_from_float32_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        fixture::channel_minmax_value<gil::float32_t> f;
+        test_convert_to<fixture::channel_reference<channel_t&>>::from(f.min_v_, f.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_channel_reference_convert_from_float32_t{});
+    }
+};
+
+struct test_channel_reference_const_from_float32_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        fixture::channel_minmax_value<gil::float32_t> f;
+        test_convert_to<fixture::channel_reference<channel_t const &>>::from(f.min_v_, f.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_channel_reference_const_from_float32_t{});
+    }
+};
+
+//--- Test gil::channel_convert from gil::float64_t to all integer channels -------------
+
+struct test_channel_value_convert_from_float64_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        fixture::channel_minmax_value<gil::float64_t> f;
+        test_convert_to<fixture::channel_value<channel_t>>::from(f.min_v_, f.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_channel_value_convert_from_float64_t{});
+    }
+};
+
+struct test_channel_reference_convert_from_float64_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        fixture::channel_minmax_value<gil::float64_t> f;
+        test_convert_to<fixture::channel_reference<channel_t &>>::from(f.min_v_, f.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_channel_reference_convert_from_float64_t{});
+    }
+};
+
+struct test_channel_reference_const_convert_from_float64_t
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        fixture::channel_minmax_value<gil::float64_t> f;
+        test_convert_to<fixture::channel_reference<channel_t const &>>::from(f.min_v_, f.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_channel_reference_const_convert_from_float64_t{});
+    }
+};
+
+int main()
+{
+    test_channel_value_convert_from_uint8_t::run();
+    test_channel_value_convert_from_int8_t::run();
+    test_channel_value_convert_from_uint16_t::run();
+    test_channel_value_convert_from_int16_t::run();
+    test_channel_value_convert_from_uint32_t::run();
+    test_channel_value_convert_from_int32_t::run();
+
+    test_channel_value_convert_from_float32_t::run();
+    test_channel_reference_convert_from_float32_t::run();
+    test_channel_reference_const_from_float32_t::run();
+
+    test_channel_value_convert_from_float64_t::run();
+    test_channel_reference_convert_from_float64_t::run();
+    test_channel_reference_const_convert_from_float64_t::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/channel/algorithm_channel_invert.cpp b/src/boost/libs/gil/test/core/channel/algorithm_channel_invert.cpp
new file mode 100644
index 000000000..3f8dd5837
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/algorithm_channel_invert.cpp
@@ -0,0 +1,118 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/channel_algorithm.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+
+#include "test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+template <typename ChannelFixtureBase>
+void test_channel_invert()
+{
+    fixture::channel<ChannelFixtureBase> f;
+    BOOST_TEST_EQ(gil::channel_invert(f.min_v_), f.max_v_);
+    BOOST_TEST_EQ(gil::channel_invert(f.max_v_), f.min_v_);
+}
+
+struct test_channel_value
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_value<channel_t>;
+        test_channel_invert<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_value{});
+    }
+};
+
+struct test_channel_reference
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_reference<channel_t&>;
+        test_channel_invert<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_reference{});
+    }
+};
+
+struct test_channel_reference_const
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_reference<channel_t const&>;
+        test_channel_invert<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_reference_const{});
+    }
+};
+
+struct test_packed_channel_reference
+{
+    template <typename BitField>
+    void operator()(BitField const &)
+    {
+        using bitfield_t = BitField;
+        using channels565_t = fixture::packed_channels565<bitfield_t>;
+        test_channel_invert<typename channels565_t::fixture_0_5_t>();
+        test_channel_invert<typename channels565_t::fixture_5_6_t>();
+        test_channel_invert<typename channels565_t::fixture_11_5_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_bitfield_types>(test_packed_channel_reference{});
+    }
+};
+
+struct test_packed_dynamic_channel_reference
+{
+    template <typename BitField>
+    void operator()(BitField const &)
+    {
+        using bitfield_t = BitField;
+        using channels565_t = fixture::packed_dynamic_channels565<bitfield_t>;
+        test_channel_invert<typename channels565_t::fixture_5_t>();
+        test_channel_invert<typename channels565_t::fixture_6_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_bitfield_types>(test_packed_dynamic_channel_reference{});
+    }
+};
+
+int main()
+{
+    test_channel_value::run();
+    test_channel_reference::run();
+    test_channel_reference_const::run();
+    test_packed_channel_reference::run();
+    test_packed_dynamic_channel_reference::run();
+
+    // TODO: packed_channel_reference_const ?
+    // TODO: packed_dynamic_channel_reference_const ?
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/channel/algorithm_channel_multiply.cpp b/src/boost/libs/gil/test/core/channel/algorithm_channel_multiply.cpp
new file mode 100644
index 000000000..bc7f017c6
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/algorithm_channel_multiply.cpp
@@ -0,0 +1,119 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/channel_algorithm.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+
+#include "test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+template <typename ChannelFixtureBase>
+void test_channel_multiply()
+{
+    fixture::channel<ChannelFixtureBase> f;
+    BOOST_TEST_EQ(gil::channel_multiply(f.min_v_, f.min_v_), f.min_v_);
+    BOOST_TEST_EQ(gil::channel_multiply(f.max_v_, f.max_v_), f.max_v_);
+    BOOST_TEST_EQ(gil::channel_multiply(f.max_v_, f.min_v_), f.min_v_);
+}
+
+struct test_channel_value
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_value<channel_t>;
+        test_channel_multiply<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_value{});
+    }
+};
+
+struct test_channel_reference
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_reference<channel_t&>;
+        test_channel_multiply<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_reference{});
+    }
+};
+
+struct test_channel_reference_const
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_reference<channel_t const&>;
+        test_channel_multiply<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_reference_const{});
+    }
+};
+
+struct test_packed_channel_reference
+{
+    template <typename BitField>
+    void operator()(BitField const &)
+    {
+        using bitfield_t = BitField;
+        using channels565_t = fixture::packed_channels565<bitfield_t>;
+        test_channel_multiply<typename channels565_t::fixture_0_5_t>();
+        test_channel_multiply<typename channels565_t::fixture_5_6_t>();
+        test_channel_multiply<typename channels565_t::fixture_11_5_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_bitfield_types>(test_packed_channel_reference{});
+    }
+};
+
+struct test_packed_dynamic_channel_reference
+{
+    template <typename BitField>
+    void operator()(BitField const &)
+    {
+        using bitfield_t = BitField;
+        using channels565_t = fixture::packed_dynamic_channels565<bitfield_t>;
+        test_channel_multiply<typename channels565_t::fixture_5_t>();
+        test_channel_multiply<typename channels565_t::fixture_6_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_bitfield_types>(test_packed_dynamic_channel_reference{});
+    }
+};
+
+int main()
+{
+    test_channel_value::run();
+    test_channel_reference::run();
+    test_channel_reference_const::run();
+    test_packed_channel_reference::run();
+    test_packed_dynamic_channel_reference::run();
+
+    // TODO: packed_channel_reference_const ?
+    // TODO: packed_dynamic_channel_reference_const ?
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/channel/algorithm_channel_relation.cpp b/src/boost/libs/gil/test/core/channel/algorithm_channel_relation.cpp
new file mode 100644
index 000000000..bad3a1d4b
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/algorithm_channel_relation.cpp
@@ -0,0 +1,127 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/channel_algorithm.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+
+#include "test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+template <typename ChannelFixtureBase>
+void test_channel_relation()
+{
+    using fixture_t = fixture::channel<ChannelFixtureBase>;
+    using channel_value_t = typename fixture_t::channel_value_t;
+    channel_value_t const one = 1;
+
+    fixture_t f;
+    BOOST_TEST_LE(f.min_v_, f.max_v_);
+    BOOST_TEST_GE(f.max_v_, f.min_v_);
+    BOOST_TEST_LT(f.min_v_, f.max_v_);
+    BOOST_TEST_GT(f.max_v_, f.min_v_);
+    BOOST_TEST_NE(f.max_v_, f.min_v_);
+    BOOST_TEST_EQ(f.min_v_, f.min_v_);
+    BOOST_TEST_NE(f.min_v_, one); // comparable to integral
+}
+
+struct test_channel_value
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_value<channel_t>;
+        test_channel_relation<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_value{});
+    }
+};
+
+struct test_channel_reference
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_reference<channel_t&>;
+        test_channel_relation<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_reference{});
+    }
+};
+
+struct test_channel_reference_const
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        using fixture_t = fixture::channel_reference<channel_t const&>;
+        test_channel_relation<fixture_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_reference_const{});
+    }
+};
+
+struct test_packed_channel_reference
+{
+    template <typename BitField>
+    void operator()(BitField const &)
+    {
+        using bitfield_t = BitField;
+        using channels565_t = fixture::packed_channels565<bitfield_t>;
+        test_channel_relation<typename channels565_t::fixture_0_5_t>();
+        test_channel_relation<typename channels565_t::fixture_5_6_t>();
+        test_channel_relation<typename channels565_t::fixture_11_5_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_bitfield_types>(test_packed_channel_reference{});
+    }
+};
+
+struct test_packed_dynamic_channel_reference
+{
+    template <typename BitField>
+    void operator()(BitField const &)
+    {
+        using bitfield_t = BitField;
+        using channels565_t = fixture::packed_dynamic_channels565<bitfield_t>;
+        test_channel_relation<typename channels565_t::fixture_5_t>();
+        test_channel_relation<typename channels565_t::fixture_6_t>();
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_bitfield_types>(test_packed_dynamic_channel_reference{});
+    }
+};
+
+int main()
+{
+    test_channel_value::run();
+    test_channel_reference::run();
+    test_channel_reference_const::run();
+    test_packed_channel_reference::run();
+    test_packed_dynamic_channel_reference::run();
+
+    // TODO: packed_channel_reference_const ?
+    // TODO: packed_dynamic_channel_reference_const ?
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/channel/channel_traits.cpp b/src/boost/libs/gil/test/core/channel/channel_traits.cpp
new file mode 100644
index 000000000..626f87b2a
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/channel_traits.cpp
@@ -0,0 +1,65 @@
+//
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/channel.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+#include <limits>
+
+namespace gil = boost::gil;
+
+template <typename T>
+void test_channel_minmax()
+{
+    BOOST_TEST_EQ(gil::channel_traits<T>::min_value(), std::numeric_limits<T>::min());
+    BOOST_TEST_EQ(gil::channel_traits<T>::max_value(), std::numeric_limits<T>::max());
+}
+
+void test_channel_minmax_uint8_t()
+{
+    test_channel_minmax<std::uint8_t>();
+}
+
+void test_channel_minmax_int8_t()
+{
+    test_channel_minmax<std::int8_t>();
+}
+
+void test_channel_minmax_uint16_t()
+{
+    test_channel_minmax<std::uint16_t>();
+}
+
+void test_channel_minmax_int16_t()
+{
+    test_channel_minmax<std::int16_t>();
+}
+
+void test_channel_minmax_uint32_t()
+{
+    test_channel_minmax<std::uint32_t>();
+}
+
+void test_channel_minmax_int32_t()
+{
+    test_channel_minmax<std::int32_t>();
+}
+
+int main()
+{
+    test_channel_minmax_uint8_t();
+    test_channel_minmax_int8_t();
+    test_channel_minmax_uint16_t();
+    test_channel_minmax_int16_t();
+    test_channel_minmax_uint32_t();
+    test_channel_minmax_int32_t();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/channel/concepts.cpp b/src/boost/libs/gil/test/core/channel/concepts.cpp
new file mode 100644
index 000000000..80499b5a1
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/concepts.cpp
@@ -0,0 +1,100 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/concepts.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+
+#include "test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+// A channel archetype - to test the minimum requirements of the concept
+struct channel_value_archetype;
+
+struct channel_archetype
+{
+    // equality comparable
+    friend bool operator==(channel_archetype const&, channel_archetype const&)
+    { return true; }
+    // inequality comparable
+    friend bool operator!=(channel_archetype const&, channel_archetype const&)
+    { return false; }
+    // less-than comparable
+    friend bool operator<(channel_archetype const&, channel_archetype const&)
+    { return false; }
+    // convertible to a scalar
+    operator std::uint8_t() const { return 0; }
+
+    channel_archetype& operator++() { return *this; }
+    channel_archetype& operator--() { return *this; }
+    channel_archetype  operator++(int) { return *this; }
+    channel_archetype  operator--(int) { return *this; }
+
+    template <typename Scalar>
+    channel_archetype operator+=(Scalar) { return *this; }
+    template <typename Scalar>
+    channel_archetype operator-=(Scalar) { return *this; }
+    template <typename Scalar>
+    channel_archetype operator*=(Scalar) { return *this; }
+    template <typename Scalar>
+    channel_archetype operator/=(Scalar) { return *this; }
+
+    using value_type        = channel_value_archetype;
+    using reference         = channel_archetype;
+    using const_reference   = channel_archetype const;
+    using pointer           = channel_value_archetype*;
+    using const_pointer     = channel_value_archetype const*;
+    static constexpr bool is_mutable = true;
+
+    static value_type min_value();
+    static value_type max_value();
+};
+
+struct channel_value_archetype : public channel_archetype
+{
+    // default constructible
+    channel_value_archetype() {}
+    // copy constructible
+    channel_value_archetype(channel_value_archetype const&) = default;
+    // assignable
+    channel_value_archetype& operator=(channel_value_archetype const&)
+    {return *this;}
+    channel_value_archetype(std::uint8_t) {}
+};
+
+channel_value_archetype channel_archetype::min_value()
+{
+    return channel_value_archetype();
+}
+
+channel_value_archetype channel_archetype::max_value()
+{
+    return channel_value_archetype();
+}
+
+void test_channel_minimal_requirements()
+{
+    // Do only compile-time tests for the archetype
+    // (because asserts like val1<val2 fail)
+    boost::function_requires<gil::MutableChannelConcept<channel_archetype>>();
+
+    fixture::channel_value<channel_value_archetype>();
+    fixture::channel_reference<channel_archetype>();
+    fixture::channel_reference<channel_archetype const&>();
+}
+
+int main()
+{
+    test_channel_minimal_requirements();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/channel/is_channel_integral.cpp b/src/boost/libs/gil/test/core/channel/is_channel_integral.cpp
new file mode 100644
index 000000000..0b7cb64f7
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/is_channel_integral.cpp
@@ -0,0 +1,74 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/channel.hpp>
+#include <boost/gil/typedefs.hpp>
+#include <boost/gil/detail/is_channel_integral.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+int main()
+{
+    static_assert(gil::detail::is_channel_integral
+        <
+            gil::packed_channel_value<1>
+        >::value,
+        "1-bit packed_channel_value should be recognized as integral");
+
+    static_assert(gil::detail::is_channel_integral
+        <
+            gil::packed_channel_value<8>
+        >::value,
+        "8-bit packed_channel_value should be recognized as integral");
+
+    static_assert(gil::detail::is_channel_integral
+        <
+            gil::packed_channel_reference
+            <
+                std::uint8_t, 0, 3, true
+            >
+        >::value,
+        "3-bit packed_channel_reference should be recognized as integral");
+
+    static_assert(gil::detail::is_channel_integral
+        <
+            gil::packed_dynamic_channel_reference
+            <
+                std::uint8_t, 2, true
+            >
+        >::value,
+        "2-bit packed_dynamic_channel_reference should be recognized as integral");
+
+    static_assert(gil::detail::is_channel_integral
+        <
+            gil::packed_dynamic_channel_reference
+            <
+                std::uint16_t, 15, true
+            >
+        >::value,
+        "15-bit packed_dynamic_channel_reference should be recognized as integral");
+
+
+    struct int_minus_value  { static std::int8_t apply() { return -64; } };
+    struct int_plus_value   { static std::int8_t apply() { return  64; } };
+    static_assert(gil::detail::is_channel_integral
+        <
+            gil::scoped_channel_value
+            <
+                std::uint8_t, int_minus_value, int_plus_value
+            >
+        >::value,
+        "integer-based scoped_channel_value should be recognized as integral");
+
+    static_assert(!gil::detail::is_channel_integral<gil::float32_t>::value,
+        "float-based packed_channel_value should not be recognized as integral");
+
+    static_assert(!gil::detail::is_channel_integral<gil::float64_t>::value,
+        "float-based packed_channel_value should not be recognized as integral");
+}
diff --git a/src/boost/libs/gil/test/core/channel/packed_channel_value.cpp b/src/boost/libs/gil/test/core/channel/packed_channel_value.cpp
new file mode 100644
index 000000000..5504bdafb
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/packed_channel_value.cpp
@@ -0,0 +1,137 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/channel.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+#include <limits>
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+template <typename T>
+void test_packed_channel_value_members()
+{
+    static_assert(std::is_same<typename T::value_type, T>::value,
+        "value_type should be the same as packed_channel_value specialization");
+
+    static_assert(std::is_lvalue_reference<typename T::reference>::value,
+        "reference should be lvalue reference type");
+
+    static_assert(std::is_lvalue_reference<typename T::reference>::value,
+        "const_reference should be lvalue reference type");
+
+    static_assert(std::is_pointer<typename T::pointer>::value,
+        "pointer should be pointer type");
+
+    static_assert(std::is_pointer<typename T::const_pointer>::value,
+        "const_pointer should be pointer type");
+
+    static_assert(T::is_mutable, "packed_channel_value should be mutable by default");
+
+    static_assert(std::is_constructible<T, typename T::integer_t>::value,
+        "packed_channel_value should be constructible from underlying integer_t");
+
+    static_assert(std::is_convertible<T, typename T::integer_t>::value,
+        "packed_channel_value should be convertible to underlying integer_t");
+}
+
+void test_packed_channel_value_with_num_bits_1()
+{
+    using bits1 = gil::packed_channel_value<1>;
+
+    test_packed_channel_value_members<bits1>();
+
+    static_assert(std::is_same<bits1::integer_t, std::uint8_t>::value,
+        "smallest integral type to store 1-bit value should be 8-bit unsigned");
+
+    BOOST_TEST_EQ(bits1::num_bits(), 1u);
+    BOOST_TEST_EQ(bits1::min_value(), 0u);
+    BOOST_TEST_EQ(bits1::max_value(), 1u);
+    BOOST_TEST_EQ(gil::channel_traits<bits1>::min_value(), 0u);
+    BOOST_TEST_EQ(gil::channel_traits<bits1>::max_value(), 1u);
+}
+
+void test_packed_channel_value_with_num_bits_8()
+{
+    using bits8 = gil::packed_channel_value<8>;
+
+    test_packed_channel_value_members<bits8>();
+
+    static_assert(std::is_same<bits8::integer_t, std::uint8_t>::value,
+        "smallest integral type to store 8-bit value should be 8-bit unsigned");
+
+    BOOST_TEST_EQ(bits8::num_bits(), 8u);
+    BOOST_TEST_EQ(bits8::min_value(), 0u);
+    BOOST_TEST_EQ(bits8::max_value(), 255u);
+    BOOST_TEST_EQ(gil::channel_traits<bits8>::min_value(), 0u);
+    BOOST_TEST_EQ(gil::channel_traits<bits8>::max_value(), 255u);
+}
+
+void test_packed_channel_value_with_num_bits15()
+{
+    using bits15 = gil::packed_channel_value<15>;
+
+    test_packed_channel_value_members<bits15>();
+
+    static_assert(std::is_same<bits15::integer_t, std::uint16_t>::value,
+        "smallest integral type to store 15-bit value should be 8-bit unsigned");
+
+    BOOST_TEST_EQ(bits15::num_bits(), 15u);
+    BOOST_TEST_EQ(bits15::min_value(), 0u);
+    BOOST_TEST_EQ(bits15::max_value(), 32767u);
+    BOOST_TEST_EQ(gil::channel_traits<bits15>::min_value(), 0u);
+    BOOST_TEST_EQ(gil::channel_traits<bits15>::max_value(), 32767u);
+}
+
+using fixture = gil::packed_channel_value<8>;
+
+void test_packed_channel_value_default_constructor()
+{
+    fixture f;
+    std::uint8_t v = f;
+    BOOST_TEST_EQ(v, std::uint8_t{0});
+}
+
+void test_packed_channel_value_user_defined_constructors()
+{
+    fixture f{1};
+    std::uint8_t v = f;
+    BOOST_TEST_EQ(v, std::uint8_t{1});
+}
+
+void test_packed_channel_value_copy_constructors()
+{
+    fixture f1{128};
+    fixture f2{f1};
+
+    BOOST_TEST_EQ(std::uint8_t{f1}, std::uint8_t{128});
+    BOOST_TEST_EQ(std::uint8_t{f1}, std::uint8_t{f2});
+}
+
+void test_packed_channel_value_assignment()
+{
+    fixture f;
+    f = 64;
+    BOOST_TEST_EQ(f, std::uint8_t{64});
+}
+
+int main()
+{
+    test_packed_channel_value_with_num_bits_1();
+    test_packed_channel_value_with_num_bits_8();
+    test_packed_channel_value_with_num_bits15();
+    test_packed_channel_value_default_constructor();
+    test_packed_channel_value_user_defined_constructors();
+    test_packed_channel_value_copy_constructors();
+    test_packed_channel_value_assignment();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/channel/scoped_channel_value.cpp b/src/boost/libs/gil/test/core/channel/scoped_channel_value.cpp
new file mode 100644
index 000000000..6b7c57dd9
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/scoped_channel_value.cpp
@@ -0,0 +1,110 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distribtted under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/channel.hpp>
+#include <boost/gil/channel_algorithm.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cmath>
+#include <cstdint>
+#include <limits>
+
+namespace gil = boost::gil;
+
+// FIXME: Remove when https://github.com/boostorg/core/issues/38 happens
+#define BOOST_GIL_TEST_IS_CLOSE(a, b, epsilon) BOOST_TEST_LT(std::fabs((a) - (b)), (epsilon))
+
+struct int_minus_value  { static std::int8_t apply() { return -64; } };
+struct int_plus_value   { static std::int8_t apply() { return  64; } };
+using fixture = gil::scoped_channel_value
+    <
+        std::uint8_t, int_minus_value, int_plus_value
+    >;
+
+void test_scoped_channel_value_default_constructor()
+{
+    fixture f;
+    std::uint8_t v = f;
+    BOOST_TEST_EQ(v, std::uint8_t{0});
+}
+
+void test_scoped_channel_value_user_defined_constructors()
+{
+    fixture f{1};
+    std::uint8_t v = f;
+    BOOST_TEST_EQ(v, std::uint8_t{1});
+}
+
+void test_scoped_channel_value_copy_constructors()
+{
+    fixture f1{128};
+    fixture f2{f1};
+
+    BOOST_TEST_EQ(std::uint8_t{f1}, std::uint8_t{128});
+    BOOST_TEST_EQ(std::uint8_t{f1}, std::uint8_t{f2});
+}
+
+void test_scoped_channel_value_assignment()
+{
+    fixture f;
+    f = 64;
+    std::uint8_t v = f;
+    BOOST_TEST_EQ(v, std::uint8_t{64});
+}
+
+void test_scoped_channel_value_float32_t()
+{
+    auto const epsilon = std::numeric_limits<float>::epsilon();
+    // min
+    BOOST_GIL_TEST_IS_CLOSE(gil::float_point_zero<float>::apply(), 0.0, epsilon);
+    BOOST_TEST_EQ(gil::channel_traits<gil::float32_t>::min_value(), 0.0);
+    // max
+    BOOST_GIL_TEST_IS_CLOSE(gil::float_point_one<float>::apply(), 1.0, epsilon);
+    BOOST_TEST_EQ(gil::channel_traits<gil::float32_t>::max_value(), 1.0);
+}
+
+void test_scoped_channel_value_float64_t()
+{
+    auto const epsilon = std::numeric_limits<double>::epsilon();
+    // min
+    BOOST_GIL_TEST_IS_CLOSE(gil::float_point_zero<double>::apply(), 0.0, epsilon);
+    BOOST_GIL_TEST_IS_CLOSE(gil::channel_traits<gil::float64_t>::min_value(), 0.0, epsilon);
+    // max
+    BOOST_GIL_TEST_IS_CLOSE(gil::float_point_one<double>::apply(), 1.0, epsilon);
+    BOOST_GIL_TEST_IS_CLOSE(gil::channel_traits<gil::float64_t>::max_value(), 1.0, epsilon);
+}
+
+void test_scoped_channel_value_halfs()
+{
+    // Create a double channel with range [-0.5 .. 0.5]
+    struct minus_half { static double apply() { return -0.5; } };
+    struct plus_half { static double apply() { return 0.5; } };
+    using halfs = gil::scoped_channel_value<double, minus_half, plus_half>;
+
+    auto const epsilon = std::numeric_limits<double>::epsilon();
+    BOOST_GIL_TEST_IS_CLOSE(gil::channel_traits<halfs>::min_value(), minus_half::apply(), epsilon);
+    BOOST_GIL_TEST_IS_CLOSE(gil::channel_traits<halfs>::max_value(), plus_half::apply(), epsilon);
+    // scoped channel maximum should map to the maximum
+    BOOST_GIL_TEST_IS_CLOSE(gil::channel_convert<std::uint16_t>(
+        gil::channel_traits<halfs>::max_value()), 65535, epsilon);
+}
+
+int main()
+{
+    test_scoped_channel_value_default_constructor();
+    test_scoped_channel_value_user_defined_constructors();
+    test_scoped_channel_value_copy_constructors();
+    test_scoped_channel_value_assignment();
+    test_scoped_channel_value_float32_t();
+    test_scoped_channel_value_float64_t();
+    test_scoped_channel_value_halfs();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/channel/test_fixture.cpp b/src/boost/libs/gil/test/core/channel/test_fixture.cpp
new file mode 100644
index 000000000..b8643a1e4
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/test_fixture.cpp
@@ -0,0 +1,134 @@
+//
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include "test_fixture.hpp"
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <limits>
+
+namespace fixture = boost::gil::test::fixture;
+
+struct test_channel_minmax_value_float
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        fixture::channel_minmax_value<channel_t> fix;
+        fixture::channel_minmax_value<channel_t> exp;
+        BOOST_TEST_EQ(fix.min_v_, exp.min_v_);
+        BOOST_TEST_EQ(fix.max_v_, exp.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_bitfield_types>(test_channel_minmax_value_float{});
+    }
+};
+
+struct test_channel_value
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        fixture::channel_value<channel_t> fix;
+        fixture::channel_minmax_value<channel_t> exp;
+        BOOST_TEST_EQ(fix.min_v_, exp.min_v_);
+        BOOST_TEST_EQ(fix.max_v_, exp.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_value{});
+    }
+};
+
+struct test_channel_reference
+{
+        template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        fixture::channel_reference<channel_t &> fix;
+        fixture::channel_minmax_value<channel_t> exp;
+        BOOST_TEST_EQ(fix.min_v_, exp.min_v_);
+        BOOST_TEST_EQ(fix.max_v_, exp.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_reference{});
+    }
+};
+
+struct test_channel_reference_const
+{
+    template <typename Channel>
+    void operator()(Channel const &)
+    {
+        using channel_t = Channel;
+        fixture::channel_reference<channel_t const &> fix;
+        fixture::channel_minmax_value<channel_t> exp;
+        BOOST_TEST_EQ(fix.min_v_, exp.min_v_);
+        BOOST_TEST_EQ(fix.max_v_, exp.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_byte_types>(test_channel_reference_const{});
+    }
+};
+
+struct test_packed_channels565
+{
+    template <typename BitField>
+    void operator()(BitField const &)
+    {
+        using bitfield_t = BitField;
+        static_assert(std::is_integral<bitfield_t>::value, "bitfield is not integral type");
+
+        // Regardless of BitField buffer bit-size, the fixture is initialized
+        // with max value that fits into 5+6+5 bit integer
+        fixture::packed_channels565<bitfield_t> fix;
+        fixture::channel_minmax_value<std::uint16_t> exp;
+        BOOST_TEST_EQ(fix.data_, exp.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_bitfield_types>(test_packed_channels565{});
+    }
+};
+
+struct test_packed_dynamic_channels565
+{
+    template <typename BitField>
+    void operator()(BitField const &)
+    {
+        using bitfield_t = BitField;
+        static_assert(std::is_integral<bitfield_t>::value, "bitfield is not integral type");
+
+        // Regardless of BitField buffer bit-size, the fixture is initialized
+        // with max value that fits into 5+6+5 bit integer
+        fixture::packed_dynamic_channels565<bitfield_t> fix;
+        fixture::channel_minmax_value<std::uint16_t> exp;
+        BOOST_TEST_EQ(fix.data_, exp.max_v_);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_bitfield_types>(test_packed_dynamic_channels565{});
+    }
+};
+
+int main()
+{
+    test_channel_minmax_value_float::run();
+    test_channel_value::run();
+    test_channel_reference::run();
+    test_channel_reference_const::run();
+    test_packed_channels565::run();
+    test_packed_dynamic_channels565::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/channel/test_fixture.hpp b/src/boost/libs/gil/test/core/channel/test_fixture.hpp
new file mode 100644
index 000000000..863fb1bd4
--- /dev/null
+++ b/src/boost/libs/gil/test/core/channel/test_fixture.hpp
@@ -0,0 +1,252 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+// Copyright 2018 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_TEST_CORE_CHANNEL_TEST_FIXTURE_HPP
+#define BOOST_GIL_TEST_CORE_CHANNEL_TEST_FIXTURE_HPP
+
+#include <boost/gil/channel.hpp>
+#include <boost/gil/concepts.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <cstdint>
+#include <tuple>
+#include <type_traits>
+
+#include "test_utility_output_stream.hpp"
+
+namespace boost { namespace gil { namespace test { namespace fixture {
+
+using channel_byte_types = std::tuple
+    <
+        std::uint8_t,
+        std::int8_t,
+        std::uint16_t,
+        std::int16_t,
+        std::uint32_t,
+        std::int32_t,
+        gil::float32_t,
+        gil::float64_t
+    >;
+
+using channel_integer_types = std::tuple
+    <
+        std::uint8_t,
+        std::int8_t,
+        std::uint16_t,
+        std::int16_t,
+        std::uint32_t,
+        std::int32_t
+    >;
+
+using channel_integer_signed_types = std::tuple
+    <
+        std::int8_t,
+        std::int16_t,
+        std::int32_t
+    >;
+
+using channel_integer_unsigned_types = std::tuple
+    <
+        std::uint8_t,
+        std::uint16_t,
+        std::uint32_t
+    >;
+
+// FIXME: If float types are convertible between each other,
+// currently they are not, then move to channel_byte_types and
+// remove channel_integer_types as redundant.
+using channel_float_types = std::tuple
+    <
+        gil::float32_t,
+        gil::float64_t
+    >;
+
+using channel_bitfield_types = std::tuple
+    <
+        std::uint16_t,
+        std::uint32_t,
+        std::uint64_t
+        // TODO: Shall we test signed types for unexpected conversions, etc.?
+    >;
+
+
+template <typename ChannelValue>
+struct channel_minmax_value
+{
+    //static_assert(std::)
+    ChannelValue min_v_;
+    ChannelValue max_v_;
+    channel_minmax_value()
+        : min_v_(gil::channel_traits<ChannelValue>::min_value())
+        , max_v_(gil::channel_traits<ChannelValue>::max_value())
+    {}
+};
+
+template <typename ChannelFixtureBase>
+struct channel : public ChannelFixtureBase
+{
+    using channel_t = typename ChannelFixtureBase::channel_t;
+    using channel_value_t = typename gil::channel_traits<channel_t>::value_type;
+
+    channel()
+    {
+        BOOST_TEST_EQ(this->min_v_, gil::channel_traits<channel_t>::min_value());
+        BOOST_TEST_EQ(this->max_v_, gil::channel_traits<channel_t>::max_value());
+    }
+};
+
+// The channel fixtures are defined for different types of channels
+// (ie. channel values, references and subbyte references)
+// ensure there are two members, min_v_ and max_v_ initialized
+// with the minimum and maximum channel value.
+// The different channel types have different ways to initialize them,
+// thus require different fixtures provided.
+
+// For basic channel types values can be initialized directly.
+template <typename ChannelValue>
+struct channel_value
+{
+    using channel_t = ChannelValue;
+    channel_t min_v_;
+    channel_t max_v_;
+
+    channel_value()
+        : min_v_(gil::channel_traits<ChannelValue>::min_value())
+        , max_v_(gil::channel_traits<ChannelValue>::max_value())
+    {
+        boost::function_requires<gil::ChannelValueConcept<ChannelValue>>();
+    }
+};
+
+// For channel references we need to have separate channel values.
+template <typename ChannelRef>
+struct channel_reference
+    : public channel_value<typename gil::channel_traits<ChannelRef>::value_type>
+{
+    using parent_t = channel_value<typename gil::channel_traits<ChannelRef>::value_type>;
+    using channel_t = ChannelRef;
+    channel_t min_v_;
+    channel_t max_v_;
+
+    channel_reference()
+        : parent_t()
+        , min_v_(parent_t::min_v_)
+        , max_v_(parent_t::max_v_)
+    {
+        boost::function_requires<ChannelConcept<ChannelRef>>();
+    }
+};
+
+// For sub-byte channel references we need to store the bit buffers somewhere
+template <typename ChannelSubbyteRef, typename ChannelMutableRef = ChannelSubbyteRef>
+struct packed_channel_reference
+{
+    using channel_t = ChannelSubbyteRef;
+    using integer_t = typename channel_t::integer_t;
+    channel_t min_v_;
+    channel_t max_v_;
+    integer_t min_bitbuf_;
+    integer_t max_bitbuf_;
+
+    packed_channel_reference() : min_v_(&min_bitbuf_), max_v_(&max_bitbuf_)
+    {
+        boost::function_requires<ChannelConcept<ChannelSubbyteRef>>();
+
+        ChannelMutableRef b1(&min_bitbuf_);
+        b1 = gil::channel_traits<channel_t>::min_value();
+        ChannelMutableRef b2(&max_bitbuf_);
+        b2 = gil::channel_traits<channel_t>::max_value();
+    }
+};
+
+// For sub-byte channel references we need to store the bit buffers somewhere
+template <typename ChannelSubbyteRef, typename ChannelMutableRef = ChannelSubbyteRef>
+struct packed_dynamic_channel_reference
+{
+    using channel_t = ChannelSubbyteRef;
+    using integer_t = typename channel_t::integer_t;
+    channel_t min_v_;
+    channel_t max_v_;
+    integer_t min_bitbuf_;
+    integer_t max_bitbuf_;
+
+    packed_dynamic_channel_reference(int first_bit1 = 1, int first_bit2 = 2)
+        : min_v_(&min_bitbuf_, first_bit1)
+        , max_v_(&max_bitbuf_, first_bit2)
+    {
+        boost::function_requires<ChannelConcept<ChannelSubbyteRef>>();
+
+        ChannelMutableRef b1(&min_bitbuf_, 1);
+        b1 = gil::channel_traits<channel_t>::min_value();
+        ChannelMutableRef b2(&max_bitbuf_, 2);
+        b2 = gil::channel_traits<channel_t>::max_value();
+    }
+};
+
+// Concrete fixture for 16-bit pack of 5,6,5-bit channels
+template <typename BitField>
+struct packed_channels565
+{
+    static_assert(sizeof(BitField) >= sizeof(std::uint16_t), "16-bit or more required");
+    using channel_0_5_t = gil::packed_channel_reference<BitField, 0, 5,true>;
+    using channel_5_6_t = gil::packed_channel_reference<BitField, 5, 6,true>;
+    using channel_11_5_t = gil::packed_channel_reference<BitField, 11, 5,true>;
+
+    using fixture_0_5_t = fixture::packed_channel_reference<channel_0_5_t>;
+    using fixture_5_6_t = fixture::packed_channel_reference<channel_5_6_t>;
+    using fixture_11_5_t = fixture::packed_channel_reference<channel_11_5_t>;
+
+    std::uint16_t data_ = 0;
+    channel_0_5_t channel1_;
+    channel_5_6_t channel2_;
+    channel_11_5_t channel3_;
+
+    packed_channels565() : channel1_(&data_), channel2_(&data_), channel3_(&data_)
+    {
+        channel1_ = gil::channel_traits<channel_0_5_t>::max_value();
+        channel2_ = gil::channel_traits<channel_5_6_t>::max_value();
+        channel3_ = gil::channel_traits<channel_11_5_t>::max_value();
+#ifdef BOOST_TEST_EQ
+        BOOST_TEST_EQ(data_, 65535);
+#endif
+    }
+};
+
+// Concrete fixture for dynamically-referenced 16-bit pack of 5,6,5-bit channels
+template <typename BitField>
+struct packed_dynamic_channels565
+{
+    static_assert(sizeof(BitField) >= sizeof(std::uint16_t), "16-bit or more required");
+    using channel_5_t = gil::packed_dynamic_channel_reference<BitField,5,true>;
+    using channel_6_t = gil::packed_dynamic_channel_reference<BitField,6,true>;
+
+    using fixture_5_t = fixture::packed_dynamic_channel_reference<channel_5_t>;
+    using fixture_6_t = fixture::packed_dynamic_channel_reference<channel_6_t>;
+
+    std::uint16_t data_ = 0;
+    channel_5_t channel1_;
+    channel_6_t channel2_;
+    channel_5_t channel3_;
+
+    packed_dynamic_channels565()
+        : channel1_(&data_, 0)
+        , channel2_(&data_, 5)
+        , channel3_(&data_, 11)
+    {
+        channel1_ = gil::channel_traits<channel_5_t>::max_value();
+        channel2_ = gil::channel_traits<channel_6_t>::max_value();
+        channel3_ = gil::channel_traits<channel_5_t>::max_value();
+#ifdef BOOST_TEST_EQ
+        BOOST_TEST_EQ(data_, 65535);
+#endif
+    }
+};
+
+}}}} // namespace boost::gil::test::fixture
+
+#endif
diff --git a/src/boost/libs/gil/test/core/color/CMakeLists.txt b/src/boost/libs/gil/test/core/color/CMakeLists.txt
new file mode 100644
index 000000000..664bd74f0
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color/CMakeLists.txt
@@ -0,0 +1,28 @@
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+foreach(_name
+  concepts
+  color_spaces_are_compatible
+  default_color_converter_impl)
+  set(_test t_core_color_${_name})
+  set(_target test_core_color_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/core/color/Jamfile b/src/boost/libs/gil/test/core/color/Jamfile
new file mode 100644
index 000000000..0b5a23420
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color/Jamfile
@@ -0,0 +1,15 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+compile concepts.cpp ;
+compile color_spaces_are_compatible.cpp ;
+compile-fail default_color_converter_impl_fail.cpp ;
+
+run default_color_converter_impl.cpp ;
diff --git a/src/boost/libs/gil/test/core/color/color_spaces_are_compatible.cpp b/src/boost/libs/gil/test/core/color/color_spaces_are_compatible.cpp
new file mode 100644
index 000000000..15f7f41d4
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color/color_spaces_are_compatible.cpp
@@ -0,0 +1,46 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/color_base.hpp>
+#include <boost/gil/concepts.hpp>
+#include <boost/gil/device_n.hpp>
+#include <boost/gil/gray.hpp>
+#include <boost/gil/rgb.hpp>
+#include <boost/gil/rgba.hpp>
+#include <boost/gil/cmyk.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/mp11.hpp>
+#include <type_traits>
+
+namespace gil = boost::gil;
+using namespace boost::mp11;
+
+template <typename T>
+using test_self_compatible = gil::color_spaces_are_compatible<T, T>;
+
+int main()
+{
+    using color_spaces = mp_list
+    <
+        gil::devicen_t<2>,
+        gil::devicen_t<3>,
+        gil::devicen_t<4>,
+        gil::devicen_t<5>,
+        gil::gray_t,
+        gil::cmyk_t,
+        gil::rgb_t,
+        gil::rgba_t
+    >;
+
+    static_assert(std::is_same
+        <
+            mp_all_of<color_spaces, test_self_compatible>,
+            std::true_type
+        >::value,
+        "color_spaces_are_compatible should yield true for the same types");
+}
diff --git a/src/boost/libs/gil/test/core/color/concepts.cpp b/src/boost/libs/gil/test/core/color/concepts.cpp
new file mode 100644
index 000000000..157f28220
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color/concepts.cpp
@@ -0,0 +1,50 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// FIXME: Avoid Clang's flooding of non-disableable warnings like:
+// "T does not declare any constructor to initialize its non-modifiable members"
+// when compiling with concepts check enabled.
+// See https://bugs.llvm.org/show_bug.cgi?id=41759
+#if !defined(BOOST_GIL_USE_CONCEPT_CHECK) && !defined(__clang__)
+#error Compile with BOOST_GIL_USE_CONCEPT_CHECK defined
+#endif
+#include <boost/gil/concepts.hpp>
+#include <boost/gil/device_n.hpp>
+#include <boost/gil/gray.hpp>
+#include <boost/gil/rgb.hpp>
+#include <boost/gil/rgba.hpp>
+#include <boost/gil/cmyk.hpp>
+
+#include <boost/concept_check.hpp>
+
+namespace gil = boost::gil;
+using boost::function_requires;
+
+int main()
+{
+    // TODO: Most constraints() for color concepts are no-op as not implemented.
+    //       Once implemented, this test should help to catch any issues early.
+
+    function_requires<gil::ColorSpaceConcept<gil::devicen_t<2>>>();
+    function_requires<gil::ColorSpaceConcept<gil::devicen_t<3>>>();
+    function_requires<gil::ColorSpaceConcept<gil::devicen_t<4>>>();
+    function_requires<gil::ColorSpaceConcept<gil::devicen_t<5>>>();
+    function_requires<gil::ColorSpaceConcept<gil::gray_t>>();
+    function_requires<gil::ColorSpaceConcept<gil::cmyk_t>>();
+    function_requires<gil::ColorSpaceConcept<gil::rgb_t>>();
+    function_requires<gil::ColorSpaceConcept<gil::rgba_t>>();
+
+    function_requires<gil::ColorSpacesCompatibleConcept<gil::gray_t, gil::gray_t>>();
+    function_requires<gil::ColorSpacesCompatibleConcept<gil::cmyk_t, gil::cmyk_t>>();
+    function_requires<gil::ColorSpacesCompatibleConcept<gil::rgb_t, gil::rgb_t>>();
+    function_requires<gil::ColorSpacesCompatibleConcept<gil::rgba_t, gil::rgba_t>>();
+    function_requires<gil::ColorSpacesCompatibleConcept
+        <
+            gil::devicen_t<2>,
+            gil::devicen_t<2>
+        >>();
+}
diff --git a/src/boost/libs/gil/test/core/color/default_color_converter_impl.cpp b/src/boost/libs/gil/test/core/color/default_color_converter_impl.cpp
new file mode 100644
index 000000000..a2ea7fd9e
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color/default_color_converter_impl.cpp
@@ -0,0 +1,112 @@
+//
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/color_convert.hpp>
+#include <boost/gil/gray.hpp>
+#include <boost/gil/rgb.hpp>
+#include <boost/gil/rgba.hpp>
+#include <boost/gil/cmyk.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include <type_traits>
+
+#include "test_utility_output_stream.hpp"
+#include "core/pixel/test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+#ifdef BOOST_GIL_TEST_DEBUG
+#include <boost/core/demangle.hpp>
+#include <iostream>
+namespace {
+template <class T>
+std::string name() { return boost::core::demangle(typeid(T).name()); }
+}
+#endif
+
+template <typename ColorSpaces>
+struct test_roundtrip_convertible
+{
+    template<typename Src, typename Dst>
+    void operator()(mp11::mp_list<Src, Dst> const&) const
+    {
+#ifdef BOOST_GIL_TEST_DEBUG
+        std::cout << "test_lossless_roundtrip:\n"
+                  << "\tsrc: " << name<Src>() << "\n\tdst: " << name<Dst>() << std::endl;
+#endif
+        using pixel_src_t = gil::pixel<std::uint8_t, gil::layout<Src>>;
+        using pixel_dst_t = gil::pixel<std::uint8_t, gil::layout<Dst>>;
+
+        pixel_src_t src1{};
+        pixel_dst_t dst1{};
+
+        gil::default_color_converter_impl<Src, Dst> convert_to;
+        convert_to(src1, dst1);
+
+        gil::default_color_converter_impl<Dst, Src> convert_from;
+        pixel_src_t src2{};
+        convert_from(dst1, src2);
+
+        BOOST_TEST_EQ(src1, src2);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each
+        <
+            mp11::mp_product<mp11::mp_list, ColorSpaces, ColorSpaces>
+        >(test_roundtrip_convertible{});
+    }
+};
+
+template <typename ColorSpaces>
+struct test_convertible
+{
+    template<typename Src, typename Dst>
+    void operator()(mp11::mp_list<Src, Dst> const&) const
+    {
+#ifdef BOOST_GIL_TEST_DEBUG
+        std::cout << "test_all:\n"
+                  << "\tsrc: " << name<Src>() << "\n\tdst: " << name<Dst>() << std::endl;
+#endif
+        using pixel_src_t = gil::pixel<std::uint8_t, gil::layout<Src>>;
+        using pixel_dst_t = gil::pixel<std::uint8_t, gil::layout<Dst>>;
+
+        pixel_src_t src{};
+        pixel_dst_t dst{};
+
+        gil::default_color_converter_impl<Src, Dst> convert_to;
+        convert_to(src, dst);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each
+        <
+            mp11::mp_product<mp11::mp_list, ColorSpaces, ColorSpaces>
+        >(test_convertible{});
+    }
+};
+
+int main()
+{
+    test_convertible
+    <
+        mp11::mp_list<gil::cmyk_t, gil::gray_t, gil::rgb_t, gil::rgba_t>
+    >::run();
+
+    test_roundtrip_convertible
+    <
+        mp11::mp_list<gil::gray_t, gil::rgb_t>
+    >::run();
+
+    test_roundtrip_convertible<mp11::mp_list<gil::cmyk_t>>::run();
+    test_roundtrip_convertible<mp11::mp_list<gil::gray_t>>::run();
+    test_roundtrip_convertible<mp11::mp_list<gil::rgba_t>>::run();
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/color/default_color_converter_impl_fail.cpp b/src/boost/libs/gil/test/core/color/default_color_converter_impl_fail.cpp
new file mode 100644
index 000000000..0f62af7be
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color/default_color_converter_impl_fail.cpp
@@ -0,0 +1,33 @@
+//
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/color_convert.hpp>
+#include <boost/gil/gray.hpp>
+#include <boost/gil/rgb.hpp>
+#include <boost/gil/rgba.hpp>
+#include <boost/gil/cmyk.hpp>
+
+#include <boost/core/ignore_unused.hpp>
+#include <boost/mp11.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+struct unknown_color_space {};
+
+int main()
+{
+    {
+        gil::default_color_converter_impl<unknown_color_space, gil::gray_t> c;
+        boost::ignore_unused(c);
+    }
+    {
+        gil::default_color_converter_impl<gil::rgb_t, unknown_color_space> c;
+        boost::ignore_unused(c);
+    }
+}
diff --git a/src/boost/libs/gil/test/core/color_base/CMakeLists.txt b/src/boost/libs/gil/test/core/color_base/CMakeLists.txt
new file mode 100644
index 000000000..db81366dc
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color_base/CMakeLists.txt
@@ -0,0 +1,28 @@
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+foreach(_name
+  concepts
+  homogeneous_color_base
+  static_transform)
+  set(_test t_core_color_base_${_name})
+  set(_target test_core_color_base_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/core/color_base/Jamfile b/src/boost/libs/gil/test/core/color_base/Jamfile
new file mode 100644
index 000000000..68f5dfe7a
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color_base/Jamfile
@@ -0,0 +1,16 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+compile concepts.cpp ;
+compile-fail static_transform_gray_to_rgb_fail.cpp ;
+compile-fail static_transform_rgb_to_cmyk_fail.cpp ;
+
+run homogeneous_color_base.cpp ;
+run static_transform.cpp ;
diff --git a/src/boost/libs/gil/test/core/color_base/concepts.cpp b/src/boost/libs/gil/test/core/color_base/concepts.cpp
new file mode 100644
index 000000000..1685df232
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color_base/concepts.cpp
@@ -0,0 +1,54 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// FIXME: Avoid Clang's flooding of non-disableable warnings like:
+// "T does not declare any constructor to initialize its non-modifiable members"
+// when compiling with concepts check enabled.
+// See https://bugs.llvm.org/show_bug.cgi?id=41759
+#if !defined(BOOST_GIL_USE_CONCEPT_CHECK) && !defined(__clang__)
+#error Compile with BOOST_GIL_USE_CONCEPT_CHECK defined
+#endif
+#include <boost/gil/concepts.hpp>
+#include <boost/gil/color_base.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/concept_check.hpp>
+
+namespace gil = boost::gil;
+using boost::function_requires;
+
+int main()
+{
+    function_requires<gil::ColorBaseConcept
+        <
+            gil::detail::homogeneous_color_base<std::uint8_t, gil::gray_layout_t, 1>
+        >>();
+
+    function_requires<gil::HomogeneousColorBaseConcept
+        <
+            gil::detail::homogeneous_color_base<std::uint8_t, gil::gray_layout_t, 1>
+        >>();
+
+    function_requires<gil::HomogeneousColorBaseValueConcept
+        <
+            gil::detail::homogeneous_color_base<std::uint8_t, gil::gray_layout_t, 1>
+        >>();
+
+    // FIXME: https://github.com/boostorg/gil/issues/271
+    //function_requires
+    //<
+    //    gil::ColorBaseConcept
+    //    <
+    //        gil::detail::homogeneous_color_base<std::uint8_t, gil::rgb_layout_t, 3>
+    //    >
+    //>();
+
+    function_requires<gil::ColorBaseConcept<gil::gray8_pixel_t>>();
+    function_requires<gil::ColorBaseConcept<gil::rgb8_pixel_t>>();
+    function_requires<gil::ColorBaseConcept<gil::bgr8_pixel_t>>();
+
+}
diff --git a/src/boost/libs/gil/test/core/color_base/homogeneous_color_base.cpp b/src/boost/libs/gil/test/core/color_base/homogeneous_color_base.cpp
new file mode 100644
index 000000000..76b5570cb
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color_base/homogeneous_color_base.cpp
@@ -0,0 +1,141 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/color_base.hpp>
+#include <boost/gil/gray.hpp>
+#include <boost/gil/rgb.hpp>
+#include <boost/gil/rgba.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+#include <boost/core/typeinfo.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+namespace {
+
+// Unknown layout is used where layout mapping is irrelevant for a test and its result.
+using unknown_layout_t = gil::gray_layout_t;
+
+template <int N>
+using color_base = gil::detail::homogeneous_color_base<std::uint8_t, unknown_layout_t, N>;
+
+std::integral_constant<int, 0> e0;
+std::integral_constant<int, 1> e1;
+std::integral_constant<int, 2> e2;
+std::integral_constant<int, 3> e3;
+std::integral_constant<int, 4> e4;
+
+} // unnamed namespace
+
+void test_homogeneous_color_base_1_default_constructor()
+{
+    using fixture = color_base<1>;
+    fixture f;
+    BOOST_TEST_EQ(std::uint8_t{f}, std::uint8_t{0});
+    BOOST_TEST_EQ(f.at(e0), std::uint8_t{0});
+}
+
+void test_homogeneous_color_base_1_value_constructor()
+{
+    using fixture = color_base<1>;
+    fixture f{1};
+    BOOST_TEST_EQ(std::uint8_t{f}, std::uint8_t{1});
+    BOOST_TEST_EQ(f.at(e0), std::uint8_t{1});
+}
+
+void test_homogeneous_color_base_2_default_constructor()
+{
+    using fixture = color_base<2>;
+    fixture f;
+    BOOST_TEST_EQ(f.at(e0), std::uint8_t{0});
+    BOOST_TEST_EQ(f.at(e1), std::uint8_t{0});
+}
+
+void test_homogeneous_color_base_2_value_constructor()
+{
+    using fixture = color_base<2>;
+    fixture f{2};
+    BOOST_TEST_EQ(f.at(e0), std::uint8_t{2});
+    BOOST_TEST_EQ(f.at(e0), f.at(e1));
+}
+
+void test_homogeneous_color_base_3_default_constructor()
+{
+    using fixture = color_base<3>;
+    fixture f;
+    BOOST_TEST_EQ(f.at(e0), std::uint8_t{0});
+    BOOST_TEST_EQ(f.at(e1), std::uint8_t{0});
+    BOOST_TEST_EQ(f.at(e2), std::uint8_t{0});
+}
+
+void test_homogeneous_color_base_3_value_constructor()
+{
+    using fixture = color_base<3>;
+    fixture f{3};
+    BOOST_TEST_EQ(f.at(e0), std::uint8_t{3});
+    BOOST_TEST_EQ(f.at(e0), f.at(e1));
+    BOOST_TEST_EQ(f.at(e0), f.at(e2));
+}
+
+void test_homogeneous_color_base_4_default_constructor()
+{
+    using fixture = color_base<4>;
+    fixture f;
+    BOOST_TEST_EQ(f.at(e0), std::uint8_t{0});
+    BOOST_TEST_EQ(f.at(e1), std::uint8_t{0});
+    BOOST_TEST_EQ(f.at(e2), std::uint8_t{0});
+    BOOST_TEST_EQ(f.at(e3), std::uint8_t{0});
+}
+
+void test_homogeneous_color_base_4_value_constructor()
+{
+    using fixture = color_base<4>;
+    fixture f{4};
+    BOOST_TEST_EQ(f.at(e0), std::uint8_t{4});
+    BOOST_TEST_EQ(f.at(e0), f.at(e1));
+    BOOST_TEST_EQ(f.at(e0), f.at(e2));
+    BOOST_TEST_EQ(f.at(e0), f.at(e3));
+}
+
+void test_homogeneous_color_base_5_default_constructor()
+{
+    using fixture = color_base<5>;
+    fixture f;
+    BOOST_TEST_EQ(f.at(e0), std::uint8_t{0});
+    BOOST_TEST_EQ(f.at(e1), std::uint8_t{0});
+    BOOST_TEST_EQ(f.at(e2), std::uint8_t{0});
+    BOOST_TEST_EQ(f.at(e3), std::uint8_t{0});
+    BOOST_TEST_EQ(f.at(e4), std::uint8_t{0});
+}
+
+void test_homogeneous_color_base_5_value_constructor()
+{
+    using fixture = color_base<5>;
+    fixture f{5};
+    BOOST_TEST_EQ(f.at(e0), f.at(e1));
+    BOOST_TEST_EQ(f.at(e0), f.at(e2));
+    BOOST_TEST_EQ(f.at(e0), f.at(e3));
+    BOOST_TEST_EQ(f.at(e0), f.at(e4));
+}
+
+int main()
+{
+    test_homogeneous_color_base_1_default_constructor();
+    test_homogeneous_color_base_1_value_constructor();
+    test_homogeneous_color_base_2_default_constructor();
+    test_homogeneous_color_base_2_value_constructor();
+    test_homogeneous_color_base_3_default_constructor();
+    test_homogeneous_color_base_3_value_constructor();
+    test_homogeneous_color_base_4_default_constructor();
+    test_homogeneous_color_base_4_value_constructor();
+    test_homogeneous_color_base_5_default_constructor();
+    test_homogeneous_color_base_5_value_constructor();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/color_base/static_transform.cpp b/src/boost/libs/gil/test/core/color_base/static_transform.cpp
new file mode 100644
index 000000000..f2f6405fd
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color_base/static_transform.cpp
@@ -0,0 +1,72 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/color_base.hpp>
+#include <boost/gil/pixel.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+void test_single_source_gray8_to_gray8()
+{
+    gil::gray8_pixel_t src{128};
+    gil::gray8_pixel_t dst{0};
+    gil::static_transform(src, dst, [](std::uint8_t src_channel) {
+        return src_channel; // copy
+    });
+    BOOST_TEST_EQ(gil::at_c<0>(src), gil::at_c<0>(dst));
+}
+
+void test_single_source_rgb8_to_rgb8()
+{
+    gil::rgb8_pixel_t src{32, 64, 128};
+    gil::rgb8_pixel_t dst{0, 0, 0};
+    gil::static_transform(src, dst, [](std::uint8_t src_channel) {
+        return src_channel; // copy
+    });
+    BOOST_TEST_EQ(gil::at_c<0>(src), gil::at_c<0>(dst));
+    BOOST_TEST_EQ(gil::at_c<1>(src), gil::at_c<1>(dst));
+    BOOST_TEST_EQ(gil::at_c<2>(src), gil::at_c<2>(dst));
+}
+
+void test_single_source_rgb8_to_gray8()
+{
+    // Transformation of wider space to narrower space is a valid operation
+    gil::rgb8_pixel_t  src{32,64, 128};
+    gil::gray8_pixel_t dst{0};
+    gil::static_transform(src, dst, [](std::uint8_t src_channel) {
+        return src_channel; // copy
+    });
+    BOOST_TEST_EQ(gil::at_c<0>(dst), std::uint8_t{32});
+}
+
+void test_single_source_cmyk8_to_rgb8()
+{
+    // Transformation of wider space to narrower space is a valid operation
+    gil::cmyk8_pixel_t src{16, 32, 64, 128};
+    gil::rgb8_pixel_t dst{0, 0, 0};
+    gil::static_transform(src, dst, [](std::uint8_t src_channel) {
+        return src_channel; // copy
+    });
+    BOOST_TEST_EQ(gil::at_c<0>(dst), std::uint8_t{16});
+    BOOST_TEST_EQ(gil::at_c<1>(dst), std::uint8_t{32});
+    BOOST_TEST_EQ(gil::at_c<2>(dst), std::uint8_t{64});
+}
+
+int main()
+{
+    test_single_source_gray8_to_gray8();
+    test_single_source_rgb8_to_rgb8();
+    test_single_source_rgb8_to_gray8();
+    test_single_source_cmyk8_to_rgb8();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/color_base/static_transform_gray_to_rgb_fail.cpp b/src/boost/libs/gil/test/core/color_base/static_transform_gray_to_rgb_fail.cpp
new file mode 100644
index 000000000..f07c9ad49
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color_base/static_transform_gray_to_rgb_fail.cpp
@@ -0,0 +1,40 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/color_base_algorithm.hpp>
+#include <boost/gil/pixel.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <cassert>
+#include <cstdint>
+
+namespace gil = boost::gil;
+
+int main()
+{
+    // K-element index must be less than size of channel_mapping_t sequence
+    // of the *destination* color base.
+
+    // RGB (wider space) transformation to Gray (narrower space) takes only R channel value
+    {
+        gil::rgb8_pixel_t src{ 32, 64, 128 };
+        gil::gray8_pixel_t dst{ 0 };
+        gil::static_transform(src, dst, [](std::uint8_t src_channel) {
+            return src_channel; // copy
+            });
+        assert(gil::at_c<0>(dst) == std::uint16_t{32});
+    }
+
+    // Gray (narrower space) to RGB (wider space) transformation FAILS to compile
+    {
+        gil::gray8_pixel_t src{32};
+        gil::rgb8_pixel_t dst{0, 0, 0};
+        gil::static_transform(src, dst, [](std::uint8_t src_channel) {
+            return src_channel; // copy
+        });
+    }
+}
diff --git a/src/boost/libs/gil/test/core/color_base/static_transform_rgb_to_cmyk_fail.cpp b/src/boost/libs/gil/test/core/color_base/static_transform_rgb_to_cmyk_fail.cpp
new file mode 100644
index 000000000..6aa6ee5d7
--- /dev/null
+++ b/src/boost/libs/gil/test/core/color_base/static_transform_rgb_to_cmyk_fail.cpp
@@ -0,0 +1,42 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/color_base_algorithm.hpp>
+#include <boost/gil/pixel.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <cassert>
+#include <cstdint>
+
+namespace gil = boost::gil;
+
+int main()
+{
+    // K-element index must be less than size of channel_mapping_t sequence
+    // of the *destination* color base.
+
+    // RGB (wider space) transformation to Gray (narrower space) takes only R channel value
+    {
+        gil::cmyk8_pixel_t src{16, 32, 64, 128};
+        gil::rgb8_pixel_t  dst{0, 0, 0};
+        gil::static_transform(src, dst, [](std::uint8_t src_channel) {
+            return src_channel; // copy
+            });
+        assert(gil::at_c<0>(dst) == std::uint16_t{16});
+        assert(gil::at_c<0>(dst) == std::uint16_t{32});
+        assert(gil::at_c<0>(dst) == std::uint16_t{64});
+    }
+
+    // RGB (narrower space) to CMYK (wider space) transformation FAILS to compile
+    {
+        gil::rgb8_pixel_t  src{16, 32, 64};
+        gil::cmyk8_pixel_t dst{0, 0, 0, 0};
+        gil::static_transform(src, dst, [](std::uint8_t src_channel) {
+            return src_channel; // copy
+        });
+    }
+}
diff --git a/src/boost/libs/gil/test/core/image/CMakeLists.txt b/src/boost/libs/gil/test/core/image/CMakeLists.txt
new file mode 100644
index 000000000..6574cf275
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image/CMakeLists.txt
@@ -0,0 +1,27 @@
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+foreach(_name
+  concepts
+  image)
+  set(_test t_core_image_${_name})
+  set(_target test_core_image_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/core/image/Jamfile b/src/boost/libs/gil/test/core/image/Jamfile
new file mode 100644
index 000000000..07da63467
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image/Jamfile
@@ -0,0 +1,13 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+compile concepts.cpp ;
+
+run image.cpp ;
diff --git a/src/boost/libs/gil/test/core/image/concepts.cpp b/src/boost/libs/gil/test/core/image/concepts.cpp
new file mode 100644
index 000000000..b9bd25513
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image/concepts.cpp
@@ -0,0 +1,30 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// FIXME: Avoid Clang's flooding of non-disableable warnings like:
+// "T does not declare any constructor to initialize its non-modifiable members"
+// when compiling with concepts check enabled.
+// See https://bugs.llvm.org/show_bug.cgi?id=41759
+#if !defined(BOOST_GIL_USE_CONCEPT_CHECK) && !defined(__clang__)
+#error Compile with BOOST_GIL_USE_CONCEPT_CHECK defined
+#endif
+#include <boost/gil.hpp>
+
+#include <boost/concept_check.hpp>
+
+#include <array>
+
+namespace gil = boost::gil;
+using boost::function_requires;
+
+int main()
+{
+    function_requires<gil::ImageConcept<gil::gray8_image_t>>();
+    function_requires<gil::ImageConcept<gil::rgb8_image_t>>();
+
+    return 0;
+}
diff --git a/src/boost/libs/gil/test/core/image/image.cpp b/src/boost/libs/gil/test/core/image/image.cpp
new file mode 100644
index 000000000..b12183432
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image/image.cpp
@@ -0,0 +1,91 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_fixture.hpp"
+#include "test_utility_output_stream.hpp"
+#include "core/pixel/test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+struct test_constructor_with_dimensions_pixel
+{
+    template <typename Image>
+    void operator()(Image const &)
+    {
+        using image_t = Image;
+        gil::point_t const dimensions{256, 128};
+        using pixel_t = typename image_t::view_t::value_type;
+        pixel_t const rnd_pixel = fixture::pixel_generator<pixel_t>::random();
+        image_t image(dimensions, rnd_pixel);
+        BOOST_TEST_EQ(image.width(), dimensions.x);
+        BOOST_TEST_EQ(image.height(), dimensions.y);
+
+        for (pixel_t const &p : gil::view(image))
+            BOOST_TEST_EQ(p, rnd_pixel);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_constructor_with_dimensions_pixel{});
+    }
+};
+
+struct test_move_constructor
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        gil::point_t const dimensions{256, 128};
+        {
+            image_t image(fixture::create_image<image_t>(dimensions.x, dimensions.y, 0));
+
+            image_t image2(std::move(image));
+            BOOST_TEST_EQ(image2.dimensions(), dimensions);
+            BOOST_TEST_EQ(image.dimensions(), gil::point_t{});
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_move_constructor{});
+    }
+};
+
+struct test_move_assignement
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        gil::point_t const dimensions{256, 128};
+        {
+            image_t image = fixture::create_image<image_t>(dimensions.x, dimensions.y, 0);
+            image_t image2 = fixture::create_image<image_t>(dimensions.x * 2, dimensions.y * 2, 1);
+            image2 = std::move(image);
+            BOOST_TEST_EQ(image2.dimensions(), dimensions);
+            BOOST_TEST_EQ(image.dimensions(), gil::point_t{});
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_move_assignement{});
+    }
+};
+
+int main()
+{
+    test_constructor_with_dimensions_pixel::run();
+
+    test_move_constructor::run();
+    test_move_assignement::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image/test_fixture.hpp b/src/boost/libs/gil/test/core/image/test_fixture.hpp
new file mode 100644
index 000000000..da604093b
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image/test_fixture.hpp
@@ -0,0 +1,71 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_TEST_CORE_IMAGE_TEST_FIXTURE_HPP
+#define BOOST_GIL_TEST_CORE_IMAGE_TEST_FIXTURE_HPP
+
+#include <boost/gil.hpp>
+#include <boost/assert.hpp>
+
+#include <cstdint>
+#include <initializer_list>
+#include <limits>
+#include <random>
+#include <tuple>
+#include <type_traits>
+
+#include "core/test_fixture.hpp"
+
+namespace boost { namespace gil { namespace test { namespace fixture {
+
+using image_types = std::tuple
+<
+    gil::gray8_image_t,
+    gil::gray16_image_t,
+    gil::gray32_image_t,
+    gil::bgr8_image_t,
+    gil::bgr16_image_t,
+    gil::bgr32_image_t,
+    gil::rgb8_image_t,
+    gil::rgb16_image_t,
+    gil::rgb32_image_t,
+    gil::rgba8_image_t,
+    gil::rgba16_image_t,
+    gil::rgba32_image_t
+>;
+
+template <typename Image, typename Generator>
+auto generate_image(std::ptrdiff_t size_x, std::ptrdiff_t size_y, Generator&& generate) -> Image
+{
+    using pixel_t = typename Image::value_type;
+
+    Image out(size_x, size_y);
+    gil::for_each_pixel(view(out), [&generate](pixel_t& p) {
+        gil::static_generate(p, [&generate]() { return generate(); });
+    });
+
+    return out;
+}
+
+template <typename Image>
+auto create_image(std::ptrdiff_t size_x, std::ptrdiff_t size_y, int channel_value) -> Image
+{
+    using pixel_t = typename Image::value_type;
+    using channel_t = typename gil::channel_type<pixel_t>::type;
+    static_assert(std::is_integral<channel_t>::value, "channel must be integral type");
+
+    Image out(size_x, size_y);
+    gil::for_each_pixel(view(out), [&channel_value](pixel_t& p) {
+        gil::static_fill(p, static_cast<channel_t>(channel_value));
+    });
+
+    return out;
+}
+
+}}}} // namespace boost::gil::test::fixture
+
+#endif
diff --git a/src/boost/libs/gil/test/core/image_processing/CMakeLists.txt b/src/boost/libs/gil/test/core/image_processing/CMakeLists.txt
new file mode 100644
index 000000000..5ecd59062
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/CMakeLists.txt
@@ -0,0 +1,53 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright 2019 Miral Shah <miralshah2211@gmail.com>
+#
+# Use, modification and distribution are subject to the Boost Software License,
+# Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+foreach(_name
+    threshold_binary
+    threshold_truncate
+    threshold_otsu)
+    set(_test t_core_image_processing_${_name})
+    set(_target test_core_image_processing_${_name})
+
+    add_executable(${_target} "")
+    target_sources(${_target} PRIVATE ${_name}.cpp)
+    target_link_libraries(${_target}
+            PRIVATE
+            gil_compile_options
+            gil_include_directories
+            gil_dependencies)
+    target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+    add_test(NAME ${_test} COMMAND ${_target})
+
+    unset(_name)
+    unset(_target)
+endforeach()
+
+foreach(_name
+  lanczos_scaling
+  simple_kernels
+  harris
+  hessian
+  box_filter
+  median_filter
+  sobel_scharr)
+  set(_test t_core_image_processing_${_name})
+  set(_target test_core_image_processing_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/core/image_processing/Jamfile b/src/boost/libs/gil/test/core/image_processing/Jamfile
new file mode 100644
index 000000000..d9593f079
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/Jamfile
@@ -0,0 +1,21 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright 2019 Miral Shah <miralshah2211@gmail.com>
+#
+# Use, modification and distribution are subject to the Boost Software License,
+# Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+import testing ;
+
+compile-fail threshold_color_spaces_not_compatible_fail.cpp ;
+run threshold_binary.cpp ;
+run threshold_truncate.cpp ;
+run threshold_otsu.cpp ;
+run lanczos_scaling.cpp ;
+run simple_kernels.cpp ;
+run harris.cpp ;
+run hessian.cpp ;
+run sobel_scharr.cpp ;
+run box_filter.cpp ;
+run median_filter.cpp ;
diff --git a/src/boost/libs/gil/test/core/image_processing/box_filter.cpp b/src/boost/libs/gil/test/core/image_processing/box_filter.cpp
new file mode 100644
index 000000000..54b0dd0e8
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/box_filter.cpp
@@ -0,0 +1,65 @@
+//
+// Copyright 2019 Miral Shah <miralshah2211@gmail.com>
+//
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <boost/gil/algorithm.hpp>
+#include <boost/gil/gray.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/image_processing/filter.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+namespace gil = boost::gil;
+
+std::uint8_t img[] =
+{
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 255, 0, 0, 0, 255, 0, 0,
+    0, 0, 0, 255, 0, 255, 0, 0, 0,
+    0, 0, 0, 0, 255, 0, 0, 0, 0,
+    0, 0, 0, 255, 0, 255, 0, 0, 0,
+    0, 0, 255, 0, 0, 0, 255, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+std::uint8_t output[] =
+{
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 28, 28, 28, 0, 28, 28, 28, 0,
+    0, 28, 56, 56, 56, 56, 56, 28, 0,
+    0, 28, 56, 85, 85, 85, 56, 28, 0,
+    0, 0, 56, 85, 141, 85, 56, 0, 0,
+    0, 28, 56, 85, 85, 85, 56, 28, 0,
+    0, 28, 56, 56, 56, 56, 56, 28, 0,
+    0, 28, 28, 28, 0, 28, 28, 28, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+void test_box_filter_with_default_parameters()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t*>(img), 9);
+
+    gil::image<gil::gray8_pixel_t> temp_img(src_view.width(), src_view.height());
+    typename gil::image<gil::gray8_pixel_t>::view_t temp_view = view(temp_img);
+    gil::gray8_view_t dst_view(temp_view);
+
+    gil::box_filter(src_view, dst_view, 3);
+
+    gil::gray8c_view_t out_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t*>(output), 9);
+
+    BOOST_TEST(gil::equal_pixels(out_view, dst_view));
+}
+
+int main()
+{
+    test_box_filter_with_default_parameters();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_processing/harris.cpp b/src/boost/libs/gil/test/core/image_processing/harris.cpp
new file mode 100644
index 000000000..f8c8e7dc6
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/harris.cpp
@@ -0,0 +1,73 @@
+//
+// Copyright 2019 Olzhas Zhumabek <anonymous.from.applecity@gmail.com>
+//
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/image_processing/numeric.hpp>
+#include <boost/gil/image_processing/harris.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+namespace gil = boost::gil;
+
+bool are_equal(gil::gray32f_view_t expected, gil::gray32f_view_t actual) {
+    if (expected.dimensions() != actual.dimensions())
+        return false;
+
+    for (long int y = 0; y < expected.height(); ++y)
+    {
+        for (long int x = 0; x < expected.width(); ++x)
+        {
+            if (expected(x, y) != actual(x, y))
+            {
+                return false;
+            }
+        }
+    }
+
+    return true;
+}
+
+void test_blank_image()
+{
+    const gil::point_t dimensions(20, 20);
+    gil::gray16s_image_t dx(dimensions, gil::gray16s_pixel_t(0), 0);
+    gil::gray16s_image_t dy(dimensions, gil::gray16s_pixel_t(0), 0);
+
+    gil::gray32f_image_t m11(dimensions);
+    gil::gray32f_image_t m12_21(dimensions);
+    gil::gray32f_image_t m22(dimensions);
+    gil::gray32f_image_t expected(dimensions, gil::gray32f_pixel_t(0), 0);
+    gil::compute_tensor_entries(
+        gil::view(dx),
+        gil::view(dy),
+        gil::view(m11),
+        gil::view(m12_21),
+        gil::view(m22)
+    );
+    BOOST_TEST(are_equal(gil::view(expected), gil::view(m11)));
+    BOOST_TEST(are_equal(gil::view(expected), gil::view(m12_21)));
+    BOOST_TEST(are_equal(gil::view(expected), gil::view(m22)));
+
+    gil::gray32f_image_t harris_response(dimensions, gil::gray32f_pixel_t(0), 0);
+    auto unnormalized_mean = gil::generate_unnormalized_mean(5);
+    gil::compute_harris_responses(
+        gil::view(m11),
+        gil::view(m12_21),
+        gil::view(m22),
+        unnormalized_mean,
+        0.04f,
+        gil::view(harris_response)
+    );
+    BOOST_TEST(are_equal(gil::view(expected), gil::view(harris_response)));
+}
+
+int main(int argc, char* argv[])
+{
+    test_blank_image();
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_processing/hessian.cpp b/src/boost/libs/gil/test/core/image_processing/hessian.cpp
new file mode 100644
index 000000000..b8e797d55
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/hessian.cpp
@@ -0,0 +1,72 @@
+//
+// Copyright 2019 Olzhas Zhumabek <anonymous.from.applecity@gmail.com>
+//
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/image_processing/numeric.hpp>
+#include <boost/gil/image_processing/hessian.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+namespace gil = boost::gil;
+
+bool are_equal(gil::gray32f_view_t expected, gil::gray32f_view_t actual) {
+    if (expected.dimensions() != actual.dimensions())
+        return false;
+
+    for (long int y = 0; y < expected.height(); ++y)
+    {
+        for (long int x = 0; x < expected.width(); ++x)
+        {
+            if (expected(x, y) != actual(x, y))
+            {
+                return false;
+            }
+        }
+    }
+
+    return true;
+}
+
+void test_blank_image()
+{
+    const gil::point_t dimensions(20, 20);
+    gil::gray16s_image_t dx(dimensions, gil::gray16s_pixel_t(0), 0);
+    gil::gray16s_image_t dy(dimensions, gil::gray16s_pixel_t(0), 0);
+
+    gil::gray32f_image_t m11(dimensions);
+    gil::gray32f_image_t m12_21(dimensions);
+    gil::gray32f_image_t m22(dimensions);
+    gil::gray32f_image_t expected(dimensions, gil::gray32f_pixel_t(0), 0);
+    gil::compute_hessian_entries(
+        gil::view(dx),
+        gil::view(dy),
+        gil::view(m11),
+        gil::view(m12_21),
+        gil::view(m22)
+    );
+    BOOST_TEST(are_equal(gil::view(expected), gil::view(m11)));
+    BOOST_TEST(are_equal(gil::view(expected), gil::view(m12_21)));
+    BOOST_TEST(are_equal(gil::view(expected), gil::view(m22)));
+
+    gil::gray32f_image_t hessian_response(dimensions, gil::gray32f_pixel_t(0), 0);
+    auto unnormalized_mean = gil::generate_unnormalized_mean(5);
+    gil::compute_hessian_responses(
+        gil::view(m11),
+        gil::view(m12_21),
+        gil::view(m22),
+        unnormalized_mean,
+        gil::view(hessian_response)
+    );
+    BOOST_TEST(are_equal(gil::view(expected), gil::view(hessian_response)));
+}
+
+int main(int argc, char* argv[])
+{
+    test_blank_image();
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_processing/lanczos_scaling.cpp b/src/boost/libs/gil/test/core/image_processing/lanczos_scaling.cpp
new file mode 100755
index 000000000..610de5ade
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/lanczos_scaling.cpp
@@ -0,0 +1,67 @@
+//
+// Copyright 2019 Olzhas Zhumabek <anonymous.from.applecity@gmail.com>
+//
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_processing/scaling.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+namespace gil = boost::gil;
+
+bool are_equal(gil::rgb8_view_t expected, gil::rgb8_view_t actual)
+{
+    if (expected.dimensions() != actual.dimensions())
+        return false;
+
+    for (long int y = 0; y < expected.height(); ++y)
+    {
+        for (long int x = 0; x < expected.width(); ++x)
+        {
+            if (expected(x, y) != actual(x, y))
+                return false;
+        }
+    }
+
+    return true;
+}
+
+void test_lanczos_black_image()
+{
+    const gil::point_t input_dimensions(20, 20);
+    const gil::point_t output_dimensions(input_dimensions.x / 2, input_dimensions.y / 2);
+    gil::rgb8_image_t image(input_dimensions, gil::rgb8_pixel_t(0, 0, 0), 0);
+    // fill with values other than 0
+    gil::rgb8_image_t output_image(
+        output_dimensions,
+        gil::rgb8_pixel_t(100, 100, 100),
+        0
+    );
+    gil::rgb8_image_t expected(
+        output_dimensions,
+        gil::rgb8_pixel_t(0, 0, 0),
+        0
+    );
+
+    auto view = gil::view(image);
+    auto output_view = gil::view(output_image);
+    auto expected_view = gil::view(expected);
+    gil::scale_lanczos(view, output_view, 5);
+    BOOST_TEST(are_equal(expected_view,output_view));
+}
+
+void test_lanczos_response_on_zero()
+{
+    //random value for a
+    BOOST_TEST_EQ(gil::lanczos(0, 2), 1);
+}
+
+int main()
+{
+    test_lanczos_black_image();
+    test_lanczos_response_on_zero();
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_processing/median_filter.cpp b/src/boost/libs/gil/test/core/image_processing/median_filter.cpp
new file mode 100644
index 000000000..e2b3ca7e2
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/median_filter.cpp
@@ -0,0 +1,65 @@
+//
+// Copyright 2019 Miral Shah <miralshah2211@gmail.com>
+//
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/algorithm.hpp>
+#include <boost/gil/gray.hpp>
+#include <boost/gil/image_processing/filter.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+namespace gil = boost::gil;
+
+std::uint8_t img[] =
+{
+    183, 128, 181, 86,  34,  55, 134, 164,  15,
+    90,  59,  94, 158, 202,   0, 106, 120, 255,
+    65,  48,   4,  21,  21,  38,  50,  37, 228,
+    27, 245, 254, 164, 135, 192,  17, 241,  19,
+    56, 165, 253, 169,  24, 200, 249,  70, 199,
+    59,  84,  41,  96,  70,  58,  24,  20, 218,
+    235, 180,  12, 168, 224, 204, 166, 153,  1,
+    181, 213, 232, 178, 165, 253,  93, 214, 72,
+    171,  50,  20,  65,  67, 133, 249, 157, 105
+};
+
+std::uint8_t output[] =
+{
+    128, 128, 128, 94,  55,  55, 120, 134, 120,
+    90,  90,  86,  86,  38,  50,  55, 120, 164,
+    65,  65,  94, 135, 135,  50,  50, 106, 228,
+    56,  65, 165, 135, 135,  50,  70,  70, 199,
+    59,  84, 165, 135, 135,  70,  70,  70, 199,
+    84,  84, 165,  96, 168, 166, 153, 153, 153,
+    181, 180, 168, 165, 168, 165, 153,  93, 72,
+    181, 180, 168, 165, 168, 166, 166, 153, 105,
+    171, 171,  65,  67, 133, 133, 157, 157, 105
+};
+
+void test_median_filter_with_kernel_size_3()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t*>(img), 9);
+
+    gil::image<gil::gray8_pixel_t> temp_img(src_view.width(), src_view.height());
+    typename gil::image<gil::gray8_pixel_t>::view_t temp_view = view(temp_img);
+    gil::gray8_view_t dst_view(temp_view);
+
+    gil::median_filter(src_view, dst_view, 3);
+
+    gil::gray8c_view_t out_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t*>(output), 9);
+
+    BOOST_TEST(gil::equal_pixels(out_view, dst_view));
+}
+
+int main()
+{
+    test_median_filter_with_kernel_size_3();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_processing/simple_kernels.cpp b/src/boost/libs/gil/test/core/image_processing/simple_kernels.cpp
new file mode 100644
index 000000000..522dec2f1
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/simple_kernels.cpp
@@ -0,0 +1,68 @@
+//
+// Copyright 2019 Olzhas Zhumabek <anonymous.from.applecity@gmail.com>
+//
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_processing/numeric.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+namespace gil = boost::gil;
+
+void test_normalized_mean_generation()
+{
+    auto kernel = gil::generate_normalized_mean(5);
+    for (const auto& cell: kernel)
+    {
+        const auto expected_value = static_cast<float>(1 / 25.f);
+        BOOST_TEST_EQ(cell, expected_value);
+    }
+}
+
+void test_unnormalized_mean_generation()
+{
+    auto kernel = gil::generate_unnormalized_mean(5);
+    for (const auto& cell: kernel)
+    {
+        BOOST_TEST_EQ(cell, 1.0f);
+    }
+}
+
+void test_gaussian_kernel_generation()
+{
+    auto kernel = boost::gil::generate_gaussian_kernel(7, 0.84089642);
+    const float expected_values[7][7] =
+    {
+        {0.00000067f, 0.00002292f, 0.00019117f, 0.00038771f, 0.00019117f, 0.00002292f, 0.00000067f},
+        {0.00002292f, 0.00078633f, 0.00655965f, 0.01330373f, 0.00655965f, 0.00078633f, 0.00002292f},
+        {0.00019117f, 0.00655965f, 0.05472157f, 0.11098164f, 0.05472157f, 0.00655965f, 0.00019117f},
+        {0.00038771f, 0.01330373f, 0.11098164f, 0.25508352f, 0.11098164f, 0.01330373f, 0.00038711f},
+        {0.00019117f, 0.00655965f, 0.05472157f, 0.11098164f, 0.05472157f, 0.00655965f, 0.00019117f},
+        {0.00002292f, 0.00078633f, 0.00655965f, 0.01330373f, 0.00655965f, 0.00078633f, 0.00002292f},
+        {0.00000067f, 0.00002292f, 0.00019117f, 0.00038771f, 0.00019117f, 0.00002292f, 0.00000067f}
+    };
+
+    for (gil::gray32f_view_t::coord_t y = 0; static_cast<std::size_t>(y) < kernel.size(); ++y)
+    {
+        for (gil::gray32f_view_t::coord_t x = 0; static_cast<std::size_t>(x) < kernel.size(); ++x)
+        {
+            auto output = kernel.at(static_cast<std::size_t>(x), static_cast<std::size_t>(y));
+            auto expected = expected_values[y][x];
+            auto percent_difference = std::ceil(std::abs(expected - output) / expected);
+            BOOST_TEST_LT(percent_difference, 5);
+        }
+    }
+}
+
+int main()
+{
+    test_normalized_mean_generation();
+    test_unnormalized_mean_generation();
+    test_gaussian_kernel_generation();
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_processing/sobel_scharr.cpp b/src/boost/libs/gil/test/core/image_processing/sobel_scharr.cpp
new file mode 100644
index 000000000..6ebc90cad
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/sobel_scharr.cpp
@@ -0,0 +1,50 @@
+//
+// Copyright 2019 Olzhas Zhumabek <anonymous.from.applecity@gmail.com>
+//
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <boost/gil/detail/math.hpp>
+#include <boost/gil/image_processing/numeric.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <algorithm>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+void test_dx_sobel_kernel()
+{
+    auto const kernel = gil::generate_dx_sobel(1);
+    BOOST_TEST_ALL_EQ(kernel.begin(), kernel.end(), gil::detail::dx_sobel.begin(), gil::detail::dx_sobel.end());
+}
+
+void test_dx_scharr_kernel()
+{
+    auto const kernel = gil::generate_dx_scharr(1);
+    BOOST_TEST_ALL_EQ(kernel.begin(), kernel.end(), gil::detail::dx_scharr.begin(), gil::detail::dx_scharr.end());
+}
+
+void test_dy_sobel_kernel()
+{
+    auto const kernel = gil::generate_dy_sobel(1);
+    BOOST_TEST_ALL_EQ(kernel.begin(), kernel.end(), gil::detail::dy_sobel.begin(), gil::detail::dy_sobel.end());
+}
+
+void test_dy_scharr_kernel()
+{
+    auto const kernel = gil::generate_dy_scharr(1);
+    BOOST_TEST_ALL_EQ(kernel.begin(), kernel.end(), gil::detail::dy_scharr.begin(), gil::detail::dy_scharr.end());
+}
+
+int main()
+{
+    test_dx_sobel_kernel();
+    test_dx_scharr_kernel();
+    test_dy_sobel_kernel();
+    test_dy_scharr_kernel();
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_processing/threshold_binary.cpp b/src/boost/libs/gil/test/core/image_processing/threshold_binary.cpp
new file mode 100644
index 000000000..098cfc062
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/threshold_binary.cpp
@@ -0,0 +1,137 @@
+//
+// Copyright 2019 Miral Shah <miralshah2211@gmail.com>
+//
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <boost/gil/gray.hpp>
+#include <boost/gil/algorithm.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/image_processing/threshold.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+namespace gil = boost::gil;
+
+int height = 4;
+int width = 4;
+
+gil::gray8_image_t original_gray(width, height), threshold_gray(width, height),
+expected_gray(width, height);
+
+gil::rgb8_image_t original_rgb(width, height), threshold_rgb(width, height),
+expected_rgb(width, height);
+
+
+void fill_original_gray()
+{
+    //filling original_gray view's upper half part with gray pixels of value 50
+    //filling original_gray view's lower half part with gray pixels of value 150
+    gil::fill_pixels(gil::subimage_view(gil::view(original_gray), 0, 0, original_gray.width(),
+        original_gray.height() / 2), gil::gray8_pixel_t(50));
+    gil::fill_pixels(gil::subimage_view(gil::view(original_gray), 0, original_gray.height() / 2,
+        original_gray.width(), original_gray.height() / 2), gil::gray8_pixel_t(150));
+}
+
+void fill_original_rgb()
+{
+    //filling original_rgb view's upper half part with rgb pixels of value 50, 155, 115
+    //filling original_rgb view's lower half part with rgb pixels of value 203, 9, 60
+    gil::fill_pixels(gil::subimage_view(gil::view(original_rgb), 0, 0, original_rgb.width(),
+        original_rgb.height() / 2), gil::rgb8_pixel_t(50, 155, 115));
+    gil::fill_pixels(gil::subimage_view(gil::view(original_rgb), 0, original_rgb.height() / 2,
+        original_rgb.width(), original_rgb.height() / 2), gil::rgb8_pixel_t(203, 9, 60));
+}
+
+void binary_gray_to_gray()
+{
+    //expected_gray view after thresholding of the original_gray view with threshold_gray value of 100
+    //filling expected_gray view's upper half part with gray pixels of value 0
+    //filling expected_gray view's lower half part with gray pixels of value 255
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, 0, original_gray.width(),
+        original_gray.height() / 2), gil::gray8_pixel_t(0));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, original_gray.height() / 2,
+        original_gray.width(), original_gray.height() / 2), gil::gray8_pixel_t(255));
+
+    gil::threshold_binary(gil::view(original_gray), gil::view(threshold_gray), 100);
+
+    //comparing threshold_gray view generated by the function with the expected_gray view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_gray), gil::view(expected_gray)));
+}
+
+void binary_inverse_gray_to_gray()
+{
+    //expected_gray view after thresholding of the original_gray view with threshold_gray value of 100
+    //filling expected_gray view's upper half part with gray pixels of value 200
+    //filling expected_gray view's lower half part with gray pixels of value 0
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, 0, original_gray.width(),
+        original_gray.height() / 2), gil::gray8_pixel_t(200));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, original_gray.height() / 2,
+        original_gray.width(), original_gray.height() / 2), gil::gray8_pixel_t(0));
+
+    gil::threshold_binary
+    (
+        gil::view(original_gray),
+        gil::view(threshold_gray),
+        100,
+        200,
+        gil::threshold_direction::inverse
+    );
+
+    //comparing threshold_gray view generated by the function with the expected_gray view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_gray), gil::view(expected_gray)));
+}
+
+void binary_rgb_to_rgb()
+{
+    //expected_rgb view after thresholding of the original_rgb view with threshold value of 100
+    //filling expected_rgb view's upper half part with rgb pixels of value 0, 165, 165
+    //filling expected_rgb view's lower half part with rgb pixels of value 165, 0, 0 
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, 0, original_rgb.width(),
+        original_rgb.height() / 2), gil::rgb8_pixel_t(0, 165, 165));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, original_rgb.height() / 2,
+        original_rgb.width(), original_rgb.height() / 2), gil::rgb8_pixel_t(165, 0, 0));
+
+    gil::threshold_binary(gil::view(original_rgb), gil::view(threshold_rgb), 100, 165);
+
+    //comparing threshold_rgb view generated by the function with the expected_rgb view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_rgb), gil::view(expected_rgb)));
+}
+
+void binary_inverse_rgb_to_rgb()
+{
+    //expected_rgb view after thresholding of the original_rgb view with threshold value of 100
+    //filling expected_rgb view's upper half part with rgb pixels of value 90, 0, 0 
+    //filling expected_rgb view's lower half part with rgb pixels of value 0, 90, 90
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, 0, original_rgb.width(),
+        original_rgb.height() / 2), gil::rgb8_pixel_t(90, 0, 0));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, original_rgb.height() / 2,
+        original_rgb.width(), original_rgb.height() / 2), gil::rgb8_pixel_t(0, 90, 90));
+
+    gil::threshold_binary
+    (
+        gil::view(original_rgb),
+        gil::view(threshold_rgb),
+        100,
+        90,
+        gil::threshold_direction::inverse
+    );
+
+    //comparing threshold_rgb view generated by the function with the expected_rgb view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_rgb), gil::view(expected_rgb)));
+}
+
+
+int main()
+{
+    fill_original_gray();
+    fill_original_rgb();
+    
+    binary_gray_to_gray();
+    binary_inverse_gray_to_gray();
+    binary_rgb_to_rgb();
+    binary_inverse_rgb_to_rgb();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_processing/threshold_color_spaces_not_compatible_fail.cpp b/src/boost/libs/gil/test/core/image_processing/threshold_color_spaces_not_compatible_fail.cpp
new file mode 100644
index 000000000..3facaf19b
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/threshold_color_spaces_not_compatible_fail.cpp
@@ -0,0 +1,25 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/image_processing/threshold.hpp>
+
+namespace gil = boost::gil;
+
+int main()
+{
+    // Source and destination views must have pixels with the same (compatible) color space
+    {
+        gil::rgb8_image_t src;
+        gil::gray8_image_t dst;
+        gil::threshold_binary(const_view(src), view(dst), 0, 255);
+    }
+    {
+        gil::gray8_image_t src;
+        gil::rgb8_image_t dst;
+        gil::threshold_binary(const_view(src), view(dst), 0, 255);
+    }
+}
diff --git a/src/boost/libs/gil/test/core/image_processing/threshold_otsu.cpp b/src/boost/libs/gil/test/core/image_processing/threshold_otsu.cpp
new file mode 100644
index 000000000..f1eaf849e
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/threshold_otsu.cpp
@@ -0,0 +1,118 @@
+//
+// Copyright 2019 Miral Shah <miralshah2211@gmail.com>
+//
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <boost/gil/algorithm.hpp>
+#include <boost/gil/gray.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/image_processing/threshold.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+namespace gil = boost::gil;
+
+int height = 2;
+int width = 2;
+
+gil::gray8_image_t original_gray(width, height), otsu_gray(width, height),
+expected_gray(width, height);
+
+gil::rgb8_image_t original_rgb(width, height), otsu_rgb(width, height), expected_rgb(width, height);
+
+void fill_gray()
+{
+    gil::view(original_gray)(0, 0) = gil::gray8_pixel_t(56);
+    gil::view(original_gray)(1, 0) = gil::gray8_pixel_t(89);
+    gil::view(original_gray)(0, 1) = gil::gray8_pixel_t(206);
+    gil::view(original_gray)(1, 1) = gil::gray8_pixel_t(139);
+}
+
+void fill_rgb()
+{
+    gil::view(original_rgb)(0, 0) = gil::rgb8_pixel_t(15, 158, 150);
+    gil::view(original_rgb)(1, 0) = gil::rgb8_pixel_t(200, 175, 150);
+    gil::view(original_rgb)(0, 1) = gil::rgb8_pixel_t(230, 170, 150);
+    gil::view(original_rgb)(1, 1) = gil::rgb8_pixel_t(25, 248, 150);
+}
+
+void test_gray_regular()
+{
+    gil::view(expected_gray)(0, 0) = gil::gray8_pixel_t(0);
+    gil::view(expected_gray)(1, 0) = gil::gray8_pixel_t(0);
+    gil::view(expected_gray)(0, 1) = gil::gray8_pixel_t(255);
+    gil::view(expected_gray)(1, 1) = gil::gray8_pixel_t(255);
+
+    gil::threshold_optimal(
+        gil::view(original_gray),
+        gil::view(otsu_gray),
+        gil::threshold_optimal_value::otsu
+    );
+
+    BOOST_TEST(gil::equal_pixels(gil::view(otsu_gray), gil::view(expected_gray)));
+}
+
+void test_gray_inverse()
+{
+    gil::view(expected_gray)(0, 0) = gil::gray8_pixel_t(255);
+    gil::view(expected_gray)(1, 0) = gil::gray8_pixel_t(255);
+    gil::view(expected_gray)(0, 1) = gil::gray8_pixel_t(0);
+    gil::view(expected_gray)(1, 1) = gil::gray8_pixel_t(0);
+
+    gil::threshold_optimal(
+        gil::view(original_gray),
+        gil::view(otsu_gray),
+        gil::threshold_optimal_value::otsu,
+        gil::threshold_direction::inverse
+    );
+
+    BOOST_TEST(gil::equal_pixels(gil::view(otsu_gray), gil::view(expected_gray)));
+}
+
+void test_rgb_regular()
+{
+    gil::view(expected_rgb)(0, 0) = gil::rgb8_pixel_t(0, 0, 255);
+    gil::view(expected_rgb)(1, 0) = gil::rgb8_pixel_t(255, 0, 255);
+    gil::view(expected_rgb)(0, 1) = gil::rgb8_pixel_t(255, 0, 255);
+    gil::view(expected_rgb)(1, 1) = gil::rgb8_pixel_t(0, 255, 255);
+
+    gil::threshold_optimal(
+        gil::view(original_rgb),
+        gil::view(otsu_rgb),
+        gil::threshold_optimal_value::otsu
+    );
+
+    BOOST_TEST(gil::equal_pixels(gil::view(otsu_rgb), gil::view(expected_rgb)));
+}
+
+void test_rgb_inverse()
+{
+    gil::view(expected_rgb)(0, 0) = gil::rgb8_pixel_t(255, 255, 0);
+    gil::view(expected_rgb)(1, 0) = gil::rgb8_pixel_t(0, 255, 0);
+    gil::view(expected_rgb)(0, 1) = gil::rgb8_pixel_t(0, 255, 0);
+    gil::view(expected_rgb)(1, 1) = gil::rgb8_pixel_t(255, 0, 0);
+
+    gil::threshold_optimal(
+        gil::view(original_rgb),
+        gil::view(otsu_rgb),
+        gil::threshold_optimal_value::otsu,
+        gil::threshold_direction::inverse
+    );
+
+    BOOST_TEST(gil::equal_pixels(gil::view(otsu_rgb), gil::view(expected_rgb)));
+}
+
+int main()
+{
+    fill_gray();
+    fill_rgb();
+
+    test_gray_regular();
+    test_gray_inverse();
+    test_rgb_regular();
+    test_rgb_inverse();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_processing/threshold_truncate.cpp b/src/boost/libs/gil/test/core/image_processing/threshold_truncate.cpp
new file mode 100644
index 000000000..18266dec6
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_processing/threshold_truncate.cpp
@@ -0,0 +1,233 @@
+//
+// Copyright 2019 Miral Shah <miralshah2211@gmail.com>
+//
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <boost/gil/algorithm.hpp>
+#include <boost/gil/gray.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/image_processing/threshold.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+namespace gil = boost::gil;
+
+int height = 4;
+int width = 4;
+
+gil::gray8_image_t original_gray(width, height), threshold_gray(width, height),
+expected_gray(width, height);
+
+gil::rgb8_image_t original_rgb(width, height), threshold_rgb(width, height),
+expected_rgb(width, height);
+
+void fill_original_gray()
+{
+    //filling original view's upper half part with gray pixels of value 50
+    //filling original view's lower half part with gray pixels of value 150
+    gil::fill_pixels(gil::subimage_view(gil::view(original_gray), 0, 0, original_gray.width(),
+        original_gray.height() / 2), gil::gray8_pixel_t(50));
+    gil::fill_pixels(gil::subimage_view(gil::view(original_gray), 0, original_gray.height() / 2,
+        original_gray.width(), original_gray.height() / 2), gil::gray8_pixel_t(150));
+}
+
+void fill_original_rgb()
+{
+    //filling original_rgb view's upper half part with rgb pixels of value 50, 85, 135
+    //filling original_rgb view's lower half part with rgb pixels of value 150, 205, 106
+    gil::fill_pixels(gil::subimage_view(gil::view(original_rgb), 0, 0, original_rgb.width(),
+        original_rgb.height() / 2), gil::rgb8_pixel_t(50, 85, 135));
+    gil::fill_pixels(gil::subimage_view(gil::view(original_rgb), 0, original_rgb.height() / 2,
+        original_rgb.width(), original_rgb.height() / 2), gil::rgb8_pixel_t(150, 205, 106));
+}
+
+void threshold_gray_to_gray()
+{
+    //expected view after thresholding of the original view with threshold value of 100
+    //filling expected view's upper half part with gray pixels of value 50
+    //filling expected view's lower half part with gray pixels of value 100
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, 0, original_gray.width(),
+        original_gray.height() / 2), gil::gray8_pixel_t(50));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, original_gray.height() / 2,
+        original_gray.width(), original_gray.height() / 2), gil::gray8_pixel_t(100));
+
+    gil::threshold_truncate(gil::view(original_gray), gil::view(threshold_gray), 100);
+
+    //comparing threshold view generated by the function with the expected view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_gray), gil::view(expected_gray)));
+}
+
+void threshold_inverse_gray_to_gray()
+{
+    //expected view after thresholding of the original view with threshold value of 100
+    //filling expected view's upper half part with gray pixels of value 100
+    //filling expected view's lower half part with gray pixels of value 150
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, 0, original_gray.width(),
+        original_gray.height() / 2), gil::gray8_pixel_t(100));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, original_gray.height() / 2,
+        original_gray.width(), original_gray.height() / 2), gil::gray8_pixel_t(150));
+
+    gil::threshold_truncate
+    (
+        gil::view(original_gray),
+        gil::view(threshold_gray),
+        100,
+        gil::threshold_truncate_mode::threshold,
+        gil::threshold_direction::inverse
+    );
+
+    //comparing threshold view generated by the function with the expected view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_gray), gil::view(expected_gray)));
+}
+
+void zero_gray_to_gray()
+{
+    //expected view after thresholding of the original view with threshold value of 100
+    //filling expected view's upper half part with gray pixels of value 0
+    //filling expected view's lower half part with gray pixels of value 150
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, 0, original_gray.width(),
+        original_gray.height() / 2), gil::gray8_pixel_t(0));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, original_gray.height() / 2,
+        original_gray.width(), original_gray.height() / 2), gil::gray8_pixel_t(150));
+
+    gil::threshold_truncate
+    (
+        gil::view(original_gray),
+        gil::view(threshold_gray),
+        100,
+        gil::threshold_truncate_mode::zero,
+        gil::threshold_direction::regular
+    );
+
+    //comparing threshold view generated by the function with the expected view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_gray), gil::view(expected_gray)));
+}
+
+void zero_inverse_gray_to_gray()
+{
+    //expected view after thresholding of the original view with threshold value of 100
+    //filling expected view's upper half part with gray pixels of value 50
+    //filling expected view's lower half part with gray pixels of value 0
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, 0, original_gray.width(),
+        original_gray.height() / 2), gil::gray8_pixel_t(50));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, original_gray.height() / 2,
+        original_gray.width(), original_gray.height() / 2), gil::gray8_pixel_t(0));
+
+    gil::threshold_truncate
+    (
+        gil::view(original_gray),
+        gil::view(threshold_gray),
+        100,
+        gil::threshold_truncate_mode::zero,
+        gil::threshold_direction::inverse
+    );
+
+    //comparing threshold view generated by the function with the expected view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_gray), gil::view(expected_gray)));
+}
+
+void threshold_rgb_to_rgb()
+{
+    //expected view after thresholding of the original view with threshold value of 100
+    //filling expected_rgb view's upper half part with rgb pixels of value 50
+    //filling expected_rgb view's lower half part with rgb pixels of value 100
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, 0, original_rgb.width(),
+        original_rgb.height() / 2), gil::rgb8_pixel_t(50, 85, 100));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, original_rgb.height() / 2,
+        original_rgb.width(), original_rgb.height() / 2), gil::rgb8_pixel_t(100, 100, 100));
+
+    gil::threshold_truncate(gil::view(original_rgb), gil::view(threshold_rgb), 100);
+
+    //comparing threshold_rgb view generated by the function with the expected_rgb view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_rgb), gil::view(expected_rgb)));
+}
+
+void threshold_inverse_rgb_to_rgb()
+{
+    //expected view after thresholding of the original view with threshold value of 100
+    //filling expected_rgb view's upper half part with rgb pixels of value 103, 59, 246
+    //filling expected_rgb view's lower half part with rgb pixels of value 150
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, 0, original_rgb.width(),
+        original_rgb.height() / 2), gil::rgb8_pixel_t(100, 100, 135));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, original_rgb.height() / 2,
+        original_rgb.width(), original_rgb.height() / 2), gil::rgb8_pixel_t(150, 205, 106));
+
+    gil::threshold_truncate
+    (
+        gil::view(original_rgb),
+        gil::view(threshold_rgb),
+        100,
+        gil::threshold_truncate_mode::threshold,
+        gil::threshold_direction::inverse
+    );
+
+    //comparing threshold_rgb view generated by the function with the expected_rgb view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_rgb), gil::view(expected_rgb)));
+}
+
+void zero_rgb_to_rgb()
+{
+    //expected view after thresholding of the original view with threshold value of 100
+    //filling expected_rgb view's upper half part with rgb pixels of value 0
+    //filling expected_rgb view's lower half part with rgb pixels of value 150
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, 0, original_rgb.width(),
+        original_rgb.height() / 2), gil::rgb8_pixel_t(0, 0, 135));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, original_rgb.height() / 2,
+        original_rgb.width(), original_rgb.height() / 2), gil::rgb8_pixel_t(150, 205, 106));
+
+    gil::threshold_truncate
+    (
+        gil::view(original_rgb),
+        gil::view(threshold_rgb),
+        100,
+        gil::threshold_truncate_mode::zero,
+        gil::threshold_direction::regular
+    );
+
+    //comparing threshold_rgb view generated by the function with the expected_rgb view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_rgb), gil::view(expected_rgb)));
+}
+
+void zero_inverse_rgb_to_rgb()
+{
+    //expected view after thresholding of the original view with threshold value of 100
+    //filling expected_rgb view's upper half part with rgb pixels of value 50
+    //filling expected_rgb view's lower half part with rgb pixels of value 0
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, 0, original_rgb.width(),
+        original_rgb.height() / 2), gil::rgb8_pixel_t(50, 85, 0));
+    gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, original_rgb.height() / 2,
+        original_rgb.width(), original_rgb.height() / 2), gil::rgb8_pixel_t(0, 0, 0));
+
+    gil::threshold_truncate
+    (
+        gil::view(original_rgb),
+        gil::view(threshold_rgb),
+        100,
+        gil::threshold_truncate_mode::zero,
+        gil::threshold_direction::inverse
+    );
+
+    //comparing threshold_rgb view generated by the function with the expected_rgb view
+    BOOST_TEST(gil::equal_pixels(gil::view(threshold_rgb), gil::view(expected_rgb)));
+}
+
+
+int main()
+{
+    fill_original_gray();
+    fill_original_rgb();
+
+    threshold_gray_to_gray();
+    threshold_inverse_gray_to_gray();
+    zero_gray_to_gray();
+    zero_inverse_gray_to_gray();
+
+    threshold_rgb_to_rgb();
+    threshold_inverse_rgb_to_rgb();
+    zero_rgb_to_rgb();
+    zero_inverse_rgb_to_rgb();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/CMakeLists.txt b/src/boost/libs/gil/test/core/image_view/CMakeLists.txt
new file mode 100644
index 000000000..e9983da94
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/CMakeLists.txt
@@ -0,0 +1,43 @@
+#
+# Copyright (c) 2018 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+foreach(_name
+  axis_iterator
+  collection
+  concepts
+  derived_view_type
+  dynamic_step
+  is_planar
+  iterator
+  planar_rgba_view
+  reverse_iterator
+  subimage_view
+  view_is_basic
+  view_is_mutable
+  view_is_step
+  view_type
+  x_iterator
+  xy_locator
+  y_iterator
+  view_type_from_pixel)
+  set(_test t_core_image_view_${_name})
+  set(_target test_core_image_view_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/core/image_view/Jamfile b/src/boost/libs/gil/test/core/image_view/Jamfile
new file mode 100644
index 000000000..4b654b92c
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/Jamfile
@@ -0,0 +1,29 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright (c) 2018 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+compile concepts.cpp ;
+compile derived_view_type.cpp ;
+compile dynamic_step.cpp ;
+compile is_planar.cpp ;
+compile view_is_basic.cpp ;
+compile view_is_mutable.cpp ;
+compile view_is_step.cpp ;
+compile view_type.cpp ;
+compile view_type_from_pixel.cpp ;
+
+run axis_iterator.cpp ;
+run collection.cpp ;
+run iterator.cpp ;
+run planar_rgba_view.cpp ;
+run reverse_iterator.cpp ;
+run subimage_view.cpp ;
+run x_iterator.cpp ;
+run xy_locator.cpp ;
+run y_iterator.cpp ;
diff --git a/src/boost/libs/gil/test/core/image_view/axis_iterator.cpp b/src/boost/libs/gil/test/core/image_view/axis_iterator.cpp
new file mode 100644
index 000000000..6b7c68813
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/axis_iterator.cpp
@@ -0,0 +1,91 @@
+//
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_fixture.hpp"
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+void test_axis_0()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        // 0,0
+        auto axit = view.axis_iterator<0>(gil::point_t{0, 0});
+        BOOST_TEST_EQ(*axit, fixture::gray8_draw_pixel);
+        BOOST_TEST(axit == view.row_begin(0));
+        // 0,1
+        ++axit;
+        BOOST_TEST_EQ(*axit, fixture::gray8_back_pixel);
+        // 1,1
+        ++axit;
+        BOOST_TEST_EQ(*axit, fixture::gray8_back_pixel);
+        BOOST_TEST(axit == view.row_end(0));
+        BOOST_TEST(axit == view.row_begin(1));
+        // 1,1
+        ++axit;
+        BOOST_TEST_EQ(*axit, fixture::gray8_draw_pixel);
+        // 2,0 - pass the end
+        ++axit;
+        BOOST_TEST(axit == view.row_end(1));
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        auto axit = view.axis_iterator<0>(gil::point_t{0, 0});
+        BOOST_TEST(axit == view.row_begin(0));
+        BOOST_TEST_EQ(*axit, fixture::rgb8_draw_pixel);
+        // 0,1
+        ++axit;
+        BOOST_TEST_EQ(*axit, fixture::rgb8_back_pixel);
+        // 1,1
+        ++axit;
+        BOOST_TEST(axit == view.row_end(0));
+        BOOST_TEST_EQ(*axit, fixture::rgb8_back_pixel);
+        BOOST_TEST(axit == view.row_begin(1));
+        // 1,1
+        ++axit;
+        BOOST_TEST_EQ(*axit, fixture::rgb8_draw_pixel);
+        // 2,0 - pass the end
+        ++axit;
+        BOOST_TEST(axit == view.row_end(1));
+    }
+}
+
+void test_axis_1()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        // 0,0
+        auto axit = view.axis_iterator<1>(gil::point_t{0, 0});
+        BOOST_TEST(axit == view.col_begin(0));
+        BOOST_TEST_EQ(*axit, fixture::gray8_draw_pixel);
+        // 0,1
+        ++axit;
+        BOOST_TEST_EQ(*axit, fixture::gray8_back_pixel);
+        // 0,2
+        ++axit;
+        BOOST_TEST(axit == view.col_end(0));
+    }
+}
+
+int main()
+{
+    test_axis_0();
+    test_axis_1();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/collection.cpp b/src/boost/libs/gil/test/core/image_view/collection.cpp
new file mode 100644
index 000000000..113488805
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/collection.cpp
@@ -0,0 +1,119 @@
+//
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <iterator>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+namespace
+{
+gil::gray8_pixel_t const gray128(128);
+gil::gray8_pixel_t const gray255(255);
+} // unnamed namespace
+
+// Collection
+
+void test_begin()
+{
+    gil::gray8_image_t image(2, 2, gray255);
+    auto view = gil::view(image);
+    BOOST_TEST_EQ(*view.begin(), gray255);
+}
+
+void test_end()
+{
+    gil::gray8_image_t::view_t view;
+    BOOST_TEST(view.begin() == view.end());
+}
+
+void test_empty()
+{
+    gil::gray8_image_t::view_t view;
+    BOOST_TEST(view.empty());
+
+    gil::gray8_image_t image(2, 2);
+    view = gil::view(image);
+    BOOST_TEST(!view.empty());
+}
+
+void test_size()
+{
+    gil::gray8_image_t::view_t view;
+    BOOST_TEST_EQ(view.size(), 0);
+
+    gil::gray8_image_t image(2, 2);
+    view = gil::view(image);
+    BOOST_TEST_EQ(view.size(), 4);
+}
+
+void test_swap()
+{
+    gil::gray8_image_t::view_t view1;
+    gil::gray8_image_t::view_t view2;
+
+    gil::gray8_image_t image(2, 2);
+    view1 = gil::view(image);
+    view1.swap(view2);
+
+    BOOST_TEST(view1.empty());
+    BOOST_TEST(!view2.empty());
+}
+
+// ForwardCollection
+
+void test_back()
+{
+    gil::gray8_image_t image(2, 2, gray255);
+    auto view = gil::view(image);
+    BOOST_TEST_EQ(view.back(), gray255);
+}
+
+void test_front()
+{
+    gil::gray8_image_t image(2, 2, gray255);
+    auto view = gil::view(image);
+    BOOST_TEST_EQ(view.front(), gray255);
+}
+
+// ReversibleCollection
+
+void test_rbegin()
+{
+    gil::gray8_image_t image(2, 2, gray255);
+    auto view = gil::view(image);
+    view(1,1) = gray128;
+    BOOST_TEST_EQ(*view.rbegin(), gray128);
+}
+
+void test_rend()
+{
+    gil::gray8_image_t::view_t view;
+    BOOST_TEST(view.rbegin() == view.rend());
+}
+
+int main()
+{
+    test_begin();
+    test_end();
+    test_empty();
+    test_size();
+    test_swap();
+    test_back();
+    test_front();
+    test_rbegin();
+    test_rend();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/concepts.cpp b/src/boost/libs/gil/test/core/image_view/concepts.cpp
new file mode 100644
index 000000000..480e9e86f
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/concepts.cpp
@@ -0,0 +1,96 @@
+//
+// Copyright 2018 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// FIXME: Avoid Clang's flooding of non-disableable warnings like:
+// "T does not declare any constructor to initialize its non-modifiable members"
+// when compiling with concepts check enabled.
+// See https://bugs.llvm.org/show_bug.cgi?id=41759
+#if !defined(BOOST_GIL_USE_CONCEPT_CHECK) && !defined(__clang__)
+#error Compile with BOOST_GIL_USE_CONCEPT_CHECK defined
+#endif
+// FIXME: There are missing headers internally, leading to incomplete types
+#if 0
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/planar_pixel_reference.hpp>
+#include <boost/gil/typedefs.hpp>
+#else
+#include <boost/gil.hpp>
+#endif
+
+namespace gil = boost::gil;
+
+template <typename View>
+void test_view()
+{
+    boost::function_requires<gil::ImageViewConcept<View>>();
+    boost::function_requires<gil::CollectionImageViewConcept<View>>();
+    boost::function_requires<gil::ForwardCollectionImageViewConcept<View>>();
+    boost::function_requires<gil::ReversibleCollectionImageViewConcept<View>>();
+}
+
+template <typename View>
+void test_view_planar()
+{
+    boost::function_requires<gil::ImageViewConcept<View>>();
+    boost::function_requires<gil::CollectionImageViewConcept<View>>();
+}
+
+int main()
+{
+    test_view<gil::gray8_view_t>();
+    test_view<gil::gray8c_view_t>();
+
+    test_view<gil::abgr8_view_t>();
+    test_view<gil::abgr8_step_view_t>();
+    test_view<gil::abgr8c_view_t>();
+    test_view<gil::abgr8c_step_view_t>();
+
+    test_view<gil::argb8_view_t>();
+    test_view<gil::argb8_step_view_t>();
+    test_view<gil::argb8c_view_t>();
+    test_view<gil::argb8c_step_view_t>();
+
+    test_view<gil::bgr8_view_t>();
+    test_view<gil::bgr8_step_view_t>();
+    test_view<gil::bgr8c_view_t>();
+    test_view<gil::bgr8c_step_view_t>();
+
+    test_view<gil::bgra8_view_t>();
+    test_view<gil::bgra8_step_view_t>();
+    test_view<gil::bgra8c_view_t>();
+    test_view<gil::bgra8c_step_view_t>();
+
+    test_view<gil::rgb8_view_t>();
+    test_view<gil::rgb8_step_view_t>();
+    test_view<gil::rgb8c_view_t>();
+    test_view<gil::rgb8c_step_view_t>();
+    test_view_planar<gil::rgb8_planar_view_t>();
+    test_view_planar<gil::rgb8_planar_step_view_t>();
+    test_view_planar<gil::rgb8c_planar_view_t>();
+    test_view_planar<gil::rgb8c_planar_step_view_t>();
+
+    test_view<gil::rgba8_view_t>();
+    test_view<gil::rgba8_step_view_t>();
+    test_view<gil::rgba8c_view_t>();
+    test_view<gil::rgba8c_step_view_t>();
+    test_view_planar<gil::rgba8_planar_view_t>();
+    test_view_planar<gil::rgba8_planar_step_view_t>();
+    test_view_planar<gil::rgba8c_planar_view_t>();
+    test_view_planar<gil::rgba8c_planar_step_view_t>();
+
+    test_view<gil::cmyk8_view_t>();
+    test_view<gil::cmyk8_step_view_t>();
+    test_view<gil::cmyk8c_view_t>();
+    test_view<gil::cmyk8c_step_view_t>();
+
+    test_view_planar<gil::cmyk8_planar_view_t>();
+    test_view_planar<gil::cmyk8_planar_step_view_t>();
+    test_view_planar<gil::cmyk8c_planar_view_t>();
+    test_view_planar<gil::cmyk8c_planar_step_view_t>();
+
+    return 0;
+}
diff --git a/src/boost/libs/gil/test/core/image_view/derived_view_type.cpp b/src/boost/libs/gil/test/core/image_view/derived_view_type.cpp
new file mode 100644
index 000000000..0ec59ffc9
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/derived_view_type.cpp
@@ -0,0 +1,45 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+int main()
+{
+
+    static_assert(std::is_same
+        <
+            gil::derived_view_type<gil::cmyk8c_planar_step_view_t>::type,
+            gil::cmyk8c_planar_step_view_t
+        >::value, "derived_view_type should be cmyk8c_planar_step_view_t");
+
+    static_assert(std::is_same
+        <
+            gil::derived_view_type
+            <
+                gil::cmyk8c_planar_step_view_t, std::uint16_t, gil::rgb_layout_t
+            >::type,
+            gil::rgb16c_planar_step_view_t
+        >::value, "derived_view_type should be rgb16c_planar_step_view_t");
+
+    static_assert(std::is_same
+        <
+            gil::derived_view_type
+            <
+                gil::cmyk8c_planar_step_view_t,
+                boost::use_default,
+                gil::rgb_layout_t,
+                std::false_type,
+                boost::use_default,
+                std::false_type
+            >::type,
+            gil::rgb8c_step_view_t
+        >::value, "derived_view_type should be rgb8c_step_view_t");
+}
diff --git a/src/boost/libs/gil/test/core/image_view/dynamic_step.cpp b/src/boost/libs/gil/test/core/image_view/dynamic_step.cpp
new file mode 100644
index 000000000..f04b135f8
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/dynamic_step.cpp
@@ -0,0 +1,133 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/dynamic_step.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/typedefs.hpp>
+
+namespace gil = boost::gil;
+
+template <typename View>
+void test()
+{
+    static_assert(
+        gil::view_is_basic
+        <
+            typename gil::dynamic_x_step_type<View>::type
+        >::value, "view does not model HasDynamicXStepTypeConcept");
+
+    static_assert(
+        gil::view_is_basic
+        <
+            typename gil::dynamic_y_step_type<View>::type
+        >::value, "view does not model HasDynamicYStepTypeConcept");
+}
+
+int main()
+{
+    test<gil::gray8_view_t>();
+    test<gil::gray8_step_view_t>();
+    test<gil::gray8c_view_t>();
+    test<gil::gray8c_step_view_t>();
+    test<gil::gray16_view_t>();
+    test<gil::gray16_step_view_t>();
+    test<gil::gray16c_view_t>();
+    test<gil::gray16c_step_view_t>();
+    test<gil::gray32_view_t>();
+    test<gil::gray32_step_view_t>();
+    test<gil::gray32c_view_t>();
+    test<gil::gray32c_step_view_t>();
+    test<gil::gray32f_view_t>();
+    test<gil::gray32f_step_view_t>();
+
+    test<gil::abgr8_view_t>();
+    test<gil::abgr8_step_view_t>();
+    test<gil::abgr16_view_t>();
+    test<gil::abgr16_step_view_t>();
+    test<gil::abgr32_view_t>();
+    test<gil::abgr32_step_view_t>();
+    test<gil::abgr32f_view_t>();
+    test<gil::abgr32f_step_view_t>();
+
+    test<gil::argb8_view_t>();
+    test<gil::argb8_step_view_t>();
+    test<gil::argb16_view_t>();
+    test<gil::argb16_step_view_t>();
+    test<gil::argb32_view_t>();
+    test<gil::argb32_step_view_t>();
+    test<gil::argb32f_view_t>();
+    test<gil::argb32f_step_view_t>();
+
+    test<gil::bgr8_view_t>();
+    test<gil::bgr8_step_view_t>();
+    test<gil::bgr16_view_t>();
+    test<gil::bgr16_step_view_t>();
+    test<gil::bgr32_view_t>();
+    test<gil::bgr32_step_view_t>();
+    test<gil::bgr32f_view_t>();
+    test<gil::bgr32f_step_view_t>();
+
+    test<gil::bgra8_view_t>();
+    test<gil::bgra8_step_view_t>();
+    test<gil::bgra16_view_t>();
+    test<gil::bgra16_step_view_t>();
+    test<gil::bgra32_view_t>();
+    test<gil::bgra32_step_view_t>();
+    test<gil::bgra32f_view_t>();
+    test<gil::bgra32f_step_view_t>();
+
+    test<gil::rgb8_view_t>();
+    test<gil::rgb8_step_view_t>();
+    test<gil::rgb8_planar_view_t>();
+    test<gil::rgb8_planar_step_view_t>();
+    test<gil::rgb16_view_t>();
+    test<gil::rgb16_step_view_t>();
+    test<gil::rgb16_planar_view_t>();
+    test<gil::rgb16_planar_step_view_t>();
+    test<gil::rgb32_view_t>();
+    test<gil::rgb32_step_view_t>();
+    test<gil::rgb32_planar_view_t>();
+    test<gil::rgb32_planar_step_view_t>();
+    test<gil::rgb32f_view_t>();
+    test<gil::rgb32f_step_view_t>();
+    test<gil::rgb32f_planar_view_t>();
+    test<gil::rgb32f_planar_step_view_t>();
+
+    test<gil::rgba8_view_t>();
+    test<gil::rgba8_step_view_t>();
+    test<gil::rgba8_planar_view_t>();
+    test<gil::rgba8_planar_step_view_t>();
+    test<gil::rgba16_view_t>();
+    test<gil::rgba16_step_view_t>();
+    test<gil::rgba16_planar_view_t>();
+    test<gil::rgba16_planar_step_view_t>();
+    test<gil::rgba32_view_t>();
+    test<gil::rgba32_step_view_t>();
+    test<gil::rgba32_planar_view_t>();
+    test<gil::rgba32_planar_step_view_t>();
+    test<gil::rgba32f_view_t>();
+    test<gil::rgba32f_step_view_t>();
+    test<gil::rgba32f_planar_view_t>();
+    test<gil::rgba32f_planar_step_view_t>();
+
+    test<gil::cmyk8_view_t>();
+    test<gil::cmyk8_step_view_t>();
+    test<gil::cmyk8_planar_view_t>();
+    test<gil::cmyk8_planar_step_view_t>();
+    test<gil::cmyk16_view_t>();
+    test<gil::cmyk16_step_view_t>();
+    test<gil::cmyk16_planar_view_t>();
+    test<gil::cmyk16_planar_step_view_t>();
+    test<gil::cmyk32_view_t>();
+    test<gil::cmyk32_step_view_t>();
+    test<gil::cmyk32_planar_view_t>();
+    test<gil::cmyk32_planar_step_view_t>();
+    test<gil::cmyk32f_view_t>();
+    test<gil::cmyk32f_step_view_t>();
+    test<gil::cmyk32f_planar_view_t>();
+    test<gil::cmyk32f_planar_step_view_t>();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/is_planar.cpp b/src/boost/libs/gil/test/core/image_view/is_planar.cpp
new file mode 100644
index 000000000..f7f6c3797
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/is_planar.cpp
@@ -0,0 +1,77 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+namespace gil = boost::gil;
+
+template <typename View>
+void test_is_planar()
+{
+    static_assert(gil::is_planar<View>::value, "view should be planar");
+}
+
+template <typename View>
+void test_is_planar_not()
+{
+    static_assert(!gil::is_planar<View>::value, "view should not be planar");
+}
+
+
+int main()
+{
+    test_is_planar_not<gil::gray8_view_t>();
+    test_is_planar_not<gil::gray8c_view_t>();
+
+    test_is_planar_not<gil::abgr8_view_t>();
+    test_is_planar_not<gil::abgr8_step_view_t>();
+    test_is_planar_not<gil::abgr8c_view_t>();
+    test_is_planar_not<gil::abgr8c_step_view_t>();
+
+    test_is_planar_not<gil::argb8_view_t>();
+    test_is_planar_not<gil::argb8_step_view_t>();
+    test_is_planar_not<gil::argb8c_view_t>();
+    test_is_planar_not<gil::argb8c_step_view_t>();
+
+    test_is_planar_not<gil::bgr8_view_t>();
+    test_is_planar_not<gil::bgr8_step_view_t>();
+    test_is_planar_not<gil::bgr8c_view_t>();
+    test_is_planar_not<gil::bgr8c_step_view_t>();
+
+    test_is_planar_not<gil::bgra8_view_t>();
+    test_is_planar_not<gil::bgra8_step_view_t>();
+    test_is_planar_not<gil::bgra8c_view_t>();
+    test_is_planar_not<gil::bgra8c_step_view_t>();
+
+    test_is_planar_not<gil::rgb8_view_t>();
+    test_is_planar_not<gil::rgb8_step_view_t>();
+    test_is_planar_not<gil::rgb8c_view_t>();
+    test_is_planar_not<gil::rgb8c_step_view_t>();
+    test_is_planar<gil::rgb8_planar_view_t>();
+    test_is_planar<gil::rgb8_planar_step_view_t>();
+    test_is_planar<gil::rgb8c_planar_view_t>();
+    test_is_planar<gil::rgb8c_planar_step_view_t>();
+
+    test_is_planar_not<gil::rgba8_view_t>();
+    test_is_planar_not<gil::rgba8_step_view_t>();
+    test_is_planar_not<gil::rgba8c_view_t>();
+    test_is_planar_not<gil::rgba8c_step_view_t>();
+    test_is_planar<gil::rgba8_planar_view_t>();
+    test_is_planar<gil::rgba8_planar_step_view_t>();
+    test_is_planar<gil::rgba8c_planar_view_t>();
+    test_is_planar<gil::rgba8c_planar_step_view_t>();
+
+    test_is_planar_not<gil::cmyk8_view_t>();
+    test_is_planar_not<gil::cmyk8_step_view_t>();
+    test_is_planar_not<gil::cmyk8c_view_t>();
+    test_is_planar_not<gil::cmyk8c_step_view_t>();
+
+    test_is_planar<gil::cmyk8_planar_view_t>();
+    test_is_planar<gil::cmyk8_planar_step_view_t>();
+    test_is_planar<gil::cmyk8c_planar_view_t>();
+    test_is_planar<gil::cmyk8c_planar_step_view_t>();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/iterator.cpp b/src/boost/libs/gil/test/core/image_view/iterator.cpp
new file mode 100644
index 000000000..8b9cecd98
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/iterator.cpp
@@ -0,0 +1,95 @@
+//
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_fixture.hpp"
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+void test_begin()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.begin(), fixture::gray8_draw_pixel);
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.begin(), fixture::rgb8_draw_pixel);
+    }
+}
+
+void test_end()
+{
+    {
+        gil::gray8_image_t image;
+        auto view = gil::view(image);
+        BOOST_TEST(view.begin() == view.end());
+    }
+    {
+        gil::rgb8_image_t image;
+        auto view = gil::view(image);
+        BOOST_TEST(view.begin() == view.end());
+    }
+}
+
+void test_at()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        // begin
+        BOOST_TEST_EQ(*view.at(0), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.at(1), fixture::gray8_back_pixel);
+        BOOST_TEST_EQ(*view.at(0, 0), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.at(0, 1), fixture::gray8_back_pixel);
+        BOOST_TEST_EQ(*view.at(gil::point_t{0, 0}), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.at(gil::point_t{0, 1}), fixture::gray8_back_pixel);
+        // end
+#ifdef NDEBUG // skip assertions
+        BOOST_TEST(view.at(4) == view.end());
+        // convoluted access to end iterator
+        BOOST_TEST(view.at(0, 2) == view.end());
+        BOOST_TEST(view.at(2, 1) == view.end());
+#endif
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        // begin
+        BOOST_TEST_EQ(*view.at(0), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.at(1), fixture::rgb8_back_pixel);
+        BOOST_TEST_EQ(*view.at(0, 0), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.at(0, 1), fixture::rgb8_back_pixel);
+        BOOST_TEST_EQ(*view.at(gil::point_t{0, 0}), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.at(gil::point_t{0, 1}), fixture::rgb8_back_pixel);
+        // end
+#ifdef NDEBUG // skip assertions
+        BOOST_TEST(view.at(4) == view.end());
+        // convoluted access to end iterator
+        BOOST_TEST(view.at(0, 2) == view.end());
+        BOOST_TEST(view.at(2, 1) == view.end());
+#endif
+    }
+}
+
+int main()
+{
+    test_begin();
+    test_end();
+    test_at();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/planar_rgba_view.cpp b/src/boost/libs/gil/test/core/image_view/planar_rgba_view.cpp
new file mode 100644
index 000000000..925a2ebec
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/planar_rgba_view.cpp
@@ -0,0 +1,71 @@
+//
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+
+#include "test_utility_output_stream.hpp"
+
+namespace boost { namespace gil {
+namespace test { namespace fixture {
+
+gil::point_t d{2, 2};
+std::uint8_t r[] = { 1, 2, 3, 4 };
+std::uint8_t g[] = { 10, 20, 30, 40 };
+std::uint8_t b[] = { 110, 120, 130, 140 };
+std::uint8_t a[] = { 251, 252, 253, 254 };
+
+}}}}
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+void test_dimensions()
+{
+    auto v = gil::planar_rgba_view(fixture::d.x, fixture::d.y, fixture::r, fixture::g, fixture::b, fixture::a, sizeof(std::uint8_t) * 2);
+    BOOST_TEST(!v.empty());
+    BOOST_TEST_EQ(v.dimensions(), fixture::d);
+    BOOST_TEST_EQ(v.num_channels(), 4u);
+    BOOST_TEST_EQ(v.size(), static_cast<std::size_t>(fixture::d.x * fixture::d.y));
+}
+
+void test_front()
+{
+    auto v = gil::planar_rgba_view(fixture::d.x, fixture::d.y, fixture::r, fixture::g, fixture::b, fixture::a, sizeof(std::uint8_t) * 2);
+    gil::rgba8_pixel_t const pf{1, 10, 110, 251};
+    BOOST_TEST_EQ(v.front(), pf);
+}
+
+void test_back()
+{
+    auto v = gil::planar_rgba_view(fixture::d.x, fixture::d.y, fixture::r, fixture::g, fixture::b, fixture::a, sizeof(std::uint8_t) * 2);
+    gil::rgba8_pixel_t const pb{4, 40, 140, 254};
+    BOOST_TEST_EQ(v.back(), pb);
+}
+
+void test_pixel_equal_to_operator()
+{
+    auto v = gil::planar_rgba_view(fixture::d.x, fixture::d.y, fixture::r, fixture::g, fixture::b, fixture::a, sizeof(std::uint8_t) * 2);
+    for (std::ptrdiff_t i = 0; i < static_cast<std::ptrdiff_t>(v.size()); i++)
+    {
+        gil::rgba8_pixel_t const p{fixture::r[i], fixture::g[i], fixture::b[i], fixture::a[i]};
+        BOOST_TEST_EQ(v[i], p);
+    }
+}
+
+int main()
+{
+    test_dimensions();
+    test_front();
+    test_back();
+    test_pixel_equal_to_operator();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/reverse_iterator.cpp b/src/boost/libs/gil/test/core/image_view/reverse_iterator.cpp
new file mode 100644
index 000000000..c901a00f9
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/reverse_iterator.cpp
@@ -0,0 +1,54 @@
+//
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_fixture.hpp"
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+void test_rbegin()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.rbegin(), fixture::gray8_draw_pixel);
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.rbegin(), fixture::rgb8_draw_pixel);
+    }
+}
+
+void test_rend()
+{
+    {
+        gil::gray8_image_t image;
+        auto view = gil::view(image);
+        BOOST_TEST(view.rbegin() == view.rend());
+    }
+    {
+        gil::rgb8_image_t image;
+        auto view = gil::view(image);
+        BOOST_TEST(view.rbegin() == view.rend());
+    }
+}
+
+int main()
+{
+    test_rbegin();
+    test_rend();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/subimage_view.cpp b/src/boost/libs/gil/test/core/image_view/subimage_view.cpp
new file mode 100644
index 000000000..d6ddbd847
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/subimage_view.cpp
@@ -0,0 +1,91 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_utility_output_stream.hpp"
+#include "core/image/test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+struct test_subimage_equals_image
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        auto i0 = fixture::create_image<image_t>(4, 4, 128);
+        auto const v0 = gil::const_view(i0);
+        BOOST_TEST_EQ(v0.dimensions().x, 4);
+        BOOST_TEST_EQ(v0.dimensions().y, 4);
+
+        // request with 2 x point_t values
+        {
+            auto v1 = gil::subimage_view(gil::view(i0), {0, 0}, i0.dimensions());
+            BOOST_TEST_EQ(v0.dimensions(), v1.dimensions());
+            BOOST_TEST(gil::equal_pixels(v0, v1));
+        }
+        // request with 4 x dimension values
+        {
+            auto v1 = gil::subimage_view(gil::view(i0), 0, 0, i0.dimensions().x, i0.dimensions().y);
+            BOOST_TEST_EQ(v0.dimensions(), v1.dimensions());
+            BOOST_TEST(gil::equal_pixels(v0, v1));
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_subimage_equals_image{});
+    }
+};
+
+struct test_subimage_equals_image_quadrants
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        auto i0 = fixture::create_image<image_t>(4, 4, 0);
+        auto v0 = gil::view(i0);
+        // create test image and set values of pixels in:
+        //  quadrant 1
+        auto const i1 = fixture::create_image<image_t>(2, 2, 255);
+        v0[2] = v0[3] = v0[6] = v0[7] = gil::const_view(i1)[0];
+        //  quadrant 2
+        auto const i2 = fixture::create_image<image_t>(2, 2, 128);
+        v0[0] = v0[1] = v0[4] = v0[5] = gil::const_view(i2)[0];
+        //  quadrant 3
+        auto const i3 = fixture::create_image<image_t>(2, 2, 64);
+        v0[8] = v0[9] = v0[12] = v0[13] = gil::const_view(i3)[0];
+        //  quadrant 4
+        auto const i4 = fixture::create_image<image_t>(2, 2, 32);
+        v0[10] = v0[11] = v0[14] = v0[15] = gil::const_view(i4)[0];
+
+        auto v1 = gil::subimage_view(gil::view(i0), { 2, 0 }, i0.dimensions() / 2);
+        BOOST_TEST(gil::equal_pixels(v1, gil::const_view(i1)));
+        auto v2 = gil::subimage_view(gil::view(i0), { 0, 0 }, i0.dimensions() / 2);
+        BOOST_TEST(gil::equal_pixels(v2, gil::const_view(i2)));
+        auto v3 = gil::subimage_view(gil::view(i0), { 0, 2 }, i0.dimensions() / 2);
+        BOOST_TEST(gil::equal_pixels(v3, gil::const_view(i3)));
+        auto v4 = gil::subimage_view(gil::view(i0), { 2, 2 }, i0.dimensions() / 2);
+        BOOST_TEST(gil::equal_pixels(v4, gil::const_view(i4)));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_subimage_equals_image_quadrants{});
+    }
+};
+
+int main()
+{
+    test_subimage_equals_image::run();
+    test_subimage_equals_image_quadrants::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/test_fixture.hpp b/src/boost/libs/gil/test/core/image_view/test_fixture.hpp
new file mode 100644
index 000000000..559402f6b
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/test_fixture.hpp
@@ -0,0 +1,37 @@
+//
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/typedefs.hpp>
+
+namespace boost { namespace gil { namespace test { namespace fixture {
+
+gil::gray8_pixel_t gray8_back_pixel{128};
+gil::gray8_pixel_t gray8_draw_pixel{64};
+gil::rgb8_pixel_t rgb8_back_pixel{255, 128, 64};
+gil::rgb8_pixel_t rgb8_draw_pixel{64, 32, 16};
+
+auto make_image_gray8() -> gil::gray8_image_t
+{
+    gil::gray8_image_t image(2, 2, gray8_back_pixel);
+    auto view = gil::view(image);
+    view(0, 0) = gray8_draw_pixel;
+    view(1, 1) = gray8_draw_pixel;
+    return image;
+}
+
+auto make_image_rgb8() -> gil::rgb8_image_t
+{
+    gil::rgb8_image_t image(2, 2, rgb8_back_pixel);
+    auto view = gil::view(image);
+    view(0, 0) = rgb8_draw_pixel;
+    view(1, 1) = rgb8_draw_pixel;
+    return image;
+}
+
+}}}}
diff --git a/src/boost/libs/gil/test/core/image_view/view_is_basic.cpp b/src/boost/libs/gil/test/core/image_view/view_is_basic.cpp
new file mode 100644
index 000000000..660efcda9
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/view_is_basic.cpp
@@ -0,0 +1,76 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+namespace gil = boost::gil;
+
+template <typename View>
+void test_view_is_basic()
+{
+    static_assert(gil::view_is_basic<View>::value, "view should be basic");
+}
+
+template <typename View>
+void test_view_is_basic_not()
+{
+    static_assert(!gil::view_is_basic<View>::value, "view should not be basic");
+}
+
+int main()
+{
+    test_view_is_basic<gil::gray8_view_t>();
+    test_view_is_basic<gil::gray8c_view_t>();
+
+    test_view_is_basic<gil::abgr8_view_t>();
+    test_view_is_basic<gil::abgr8_step_view_t>();
+    test_view_is_basic<gil::abgr8c_view_t>();
+    test_view_is_basic<gil::abgr8c_step_view_t>();
+
+    test_view_is_basic<gil::argb8_view_t>();
+    test_view_is_basic<gil::argb8_step_view_t>();
+    test_view_is_basic<gil::argb8c_view_t>();
+    test_view_is_basic<gil::argb8c_step_view_t>();
+
+    test_view_is_basic<gil::bgr8_view_t>();
+    test_view_is_basic<gil::bgr8_step_view_t>();
+    test_view_is_basic<gil::bgr8c_view_t>();
+    test_view_is_basic<gil::bgr8c_step_view_t>();
+
+    test_view_is_basic<gil::bgra8_view_t>();
+    test_view_is_basic<gil::bgra8_step_view_t>();
+    test_view_is_basic<gil::bgra8c_view_t>();
+    test_view_is_basic<gil::bgra8c_step_view_t>();
+
+    test_view_is_basic<gil::rgb8_view_t>();
+    test_view_is_basic<gil::rgb8_step_view_t>();
+    test_view_is_basic<gil::rgb8_planar_view_t>();
+    test_view_is_basic<gil::rgb8_planar_step_view_t>();
+    test_view_is_basic<gil::rgb8c_view_t>();
+    test_view_is_basic<gil::rgb8c_step_view_t>();
+    test_view_is_basic<gil::rgb8c_planar_view_t>();
+    test_view_is_basic<gil::rgb8c_planar_step_view_t>();
+
+    test_view_is_basic<gil::rgba8_view_t>();
+    test_view_is_basic<gil::rgba8_step_view_t>();
+    test_view_is_basic<gil::rgba8_planar_view_t>();
+    test_view_is_basic<gil::rgba8_planar_step_view_t>();
+    test_view_is_basic<gil::rgba8c_view_t>();
+    test_view_is_basic<gil::rgba8c_step_view_t>();
+    test_view_is_basic<gil::rgba8c_planar_view_t>();
+    test_view_is_basic<gil::rgba8c_planar_step_view_t>();
+
+    test_view_is_basic<gil::cmyk8_view_t>();
+    test_view_is_basic<gil::cmyk8_step_view_t>();
+    test_view_is_basic<gil::cmyk8c_view_t>();
+    test_view_is_basic<gil::cmyk8c_step_view_t>();
+
+    test_view_is_basic<gil::cmyk8_planar_view_t>();
+    test_view_is_basic<gil::cmyk8_planar_step_view_t>();
+    test_view_is_basic<gil::cmyk8c_planar_view_t>();
+    test_view_is_basic<gil::cmyk8c_planar_step_view_t>();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/view_is_mutable.cpp b/src/boost/libs/gil/test/core/image_view/view_is_mutable.cpp
new file mode 100644
index 000000000..560007df3
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/view_is_mutable.cpp
@@ -0,0 +1,76 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+namespace gil = boost::gil;
+
+template <typename View>
+void test_view_is_mutable()
+{
+    static_assert(gil::view_is_mutable<View>::value, "view should be mutable");
+}
+
+template <typename View>
+void test_view_is_mutable_not()
+{
+    static_assert(!gil::view_is_mutable<View>::value, "view should not be mutable");
+}
+
+int main()
+{
+    test_view_is_mutable<gil::gray8_view_t>();
+    test_view_is_mutable_not<gil::gray8c_view_t>();
+
+    test_view_is_mutable<gil::abgr8_view_t>();
+    test_view_is_mutable<gil::abgr8_step_view_t>();
+    test_view_is_mutable_not<gil::abgr8c_view_t>();
+    test_view_is_mutable_not<gil::abgr8c_step_view_t>();
+
+    test_view_is_mutable<gil::argb8_view_t>();
+    test_view_is_mutable<gil::argb8_step_view_t>();
+    test_view_is_mutable_not<gil::argb8c_view_t>();
+    test_view_is_mutable_not<gil::argb8c_step_view_t>();
+
+    test_view_is_mutable<gil::bgr8_view_t>();
+    test_view_is_mutable<gil::bgr8_step_view_t>();
+    test_view_is_mutable_not<gil::bgr8c_view_t>();
+    test_view_is_mutable_not<gil::bgr8c_step_view_t>();
+
+    test_view_is_mutable<gil::bgra8_view_t>();
+    test_view_is_mutable<gil::bgra8_step_view_t>();
+    test_view_is_mutable_not<gil::bgra8c_view_t>();
+    test_view_is_mutable_not<gil::bgra8c_step_view_t>();
+
+    test_view_is_mutable<gil::rgb8_view_t>();
+    test_view_is_mutable<gil::rgb8_step_view_t>();
+    test_view_is_mutable<gil::rgb8_planar_view_t>();
+    test_view_is_mutable<gil::rgb8_planar_step_view_t>();
+    test_view_is_mutable_not<gil::rgb8c_view_t>();
+    test_view_is_mutable_not<gil::rgb8c_step_view_t>();
+    test_view_is_mutable_not<gil::rgb8c_planar_view_t>();
+    test_view_is_mutable_not<gil::rgb8c_planar_step_view_t>();
+
+    test_view_is_mutable<gil::rgba8_view_t>();
+    test_view_is_mutable<gil::rgba8_step_view_t>();
+    test_view_is_mutable<gil::rgba8_planar_view_t>();
+    test_view_is_mutable<gil::rgba8_planar_step_view_t>();
+    test_view_is_mutable_not<gil::rgba8c_view_t>();
+    test_view_is_mutable_not<gil::rgba8c_step_view_t>();
+    test_view_is_mutable_not<gil::rgba8c_planar_view_t>();
+    test_view_is_mutable_not<gil::rgba8c_planar_step_view_t>();
+
+    test_view_is_mutable<gil::cmyk8_view_t>();
+    test_view_is_mutable<gil::cmyk8_step_view_t>();
+    test_view_is_mutable_not<gil::cmyk8c_view_t>();
+    test_view_is_mutable_not<gil::cmyk8c_step_view_t>();
+
+    test_view_is_mutable<gil::cmyk8_planar_view_t>();
+    test_view_is_mutable<gil::cmyk8_planar_step_view_t>();
+    test_view_is_mutable_not<gil::cmyk8c_planar_view_t>();
+    test_view_is_mutable_not<gil::cmyk8c_planar_step_view_t>();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/view_is_step.cpp b/src/boost/libs/gil/test/core/image_view/view_is_step.cpp
new file mode 100644
index 000000000..5371a7825
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/view_is_step.cpp
@@ -0,0 +1,57 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+namespace gil = boost::gil;
+
+template <typename View>
+void test_view_is_step_in_xy()
+{
+    static_assert(gil::view_is_step_in_x<View>::value, "view should support horizontal step");
+    static_assert(gil::view_is_step_in_y<View>::value, "view should support vertical step");
+}
+
+template <typename View>
+void test_view_is_step_in_y()
+{
+    static_assert(gil::view_is_step_in_y<View>::value, "view should support vertical step");
+}
+
+template <typename View>
+void test_view_is_step_in_x_not()
+{
+    static_assert(!gil::view_is_step_in_x<View>::value, "view should not support horizontal step");
+}
+
+int main()
+{
+    test_view_is_step_in_xy<gil::gray8_step_view_t>();
+    test_view_is_step_in_xy<gil::abgr8_step_view_t>();
+    test_view_is_step_in_xy<gil::argb8_step_view_t>();
+    test_view_is_step_in_xy<gil::bgr8_step_view_t>();
+    test_view_is_step_in_xy<gil::bgra8_step_view_t>();
+    test_view_is_step_in_xy<gil::rgb8_step_view_t>();
+    test_view_is_step_in_xy<gil::rgba8_step_view_t>();
+    test_view_is_step_in_xy<gil::rgba8_planar_step_view_t>();
+    test_view_is_step_in_xy<gil::cmyk8_step_view_t>();
+    test_view_is_step_in_xy<gil::cmyk8_planar_step_view_t>();
+
+    test_view_is_step_in_y<gil::rgb8_view_t>();
+    test_view_is_step_in_y<gil::rgb8_planar_view_t>();
+    test_view_is_step_in_y<gil::rgba8_view_t>();
+    test_view_is_step_in_y<gil::rgba8_planar_view_t>();
+    test_view_is_step_in_y<gil::cmyk8_view_t>();
+    test_view_is_step_in_y<gil::cmyk8_planar_view_t>();
+
+    test_view_is_step_in_x_not<gil::rgb8_view_t>();
+    test_view_is_step_in_x_not<gil::rgb8_planar_view_t>();
+    test_view_is_step_in_x_not<gil::rgba8_view_t>();
+    test_view_is_step_in_x_not<gil::rgba8_planar_view_t>();
+    test_view_is_step_in_x_not<gil::cmyk8_view_t>();
+    test_view_is_step_in_x_not<gil::cmyk8_planar_view_t>();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/view_type.cpp b/src/boost/libs/gil/test/core/image_view/view_type.cpp
new file mode 100644
index 000000000..6c8180035
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/view_type.cpp
@@ -0,0 +1,114 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+struct Interleaved : std::false_type {};
+struct Planar : std::true_type {};
+struct NotStepX : std::false_type {};
+struct StepX : std::true_type {};
+struct Immutable : std::false_type {};
+struct Mutable : std::true_type {};
+
+template <typename ResultView, typename Layout, typename IsPlanar, typename IsStepX, typename IsMutable>
+void test()
+{
+    static_assert(std::is_same
+    <
+        typename gil::view_type
+        <
+            std::uint8_t,
+            Layout,
+            IsPlanar::value,
+            IsStepX::value,
+            IsMutable::value
+        >::type,
+        ResultView
+    >::value, "view_type yields unexpected view");
+}
+
+template <typename ResultView, typename Layout, typename IsPlanar, typename IsStepX, typename IsMutable>
+void test_not()
+{
+    static_assert(!std::is_same
+    <
+        typename gil::view_type
+        <
+            std::uint8_t,
+            Layout,
+            IsPlanar::value,
+            IsStepX::value,
+            IsMutable::value
+        >::type,
+        ResultView
+    >::value, "view_type yields unexpected view");
+}
+
+int main()
+{
+    test<gil::gray8_view_t, gil::gray_layout_t, Interleaved, NotStepX, Mutable>();
+    test<gil::gray8c_view_t, gil::gray_layout_t, Interleaved, NotStepX, Immutable>();
+    test<gil::gray8_step_view_t, gil::gray_layout_t, Interleaved, StepX, Mutable>();
+    test<gil::gray8c_step_view_t, gil::gray_layout_t, Interleaved, StepX, Immutable>();
+    test_not<gil::gray8_view_t, gil::gray_layout_t, Planar, NotStepX, Mutable>();
+    test_not<gil::gray8_view_t, gil::rgb_layout_t, Planar, NotStepX, Mutable>();
+    test_not<gil::gray8_view_t, gil::gray_layout_t, Interleaved, StepX, Mutable>();
+    test_not<gil::gray8_view_t, gil::gray_layout_t, Interleaved, NotStepX, Immutable>();
+
+    test<gil::abgr8_view_t, gil::abgr_layout_t, Interleaved, NotStepX, Mutable>();
+    test<gil::abgr8c_view_t, gil::abgr_layout_t, Interleaved, NotStepX, Immutable>();
+    test<gil::abgr8_step_view_t, gil::abgr_layout_t, Interleaved, StepX, Mutable>();
+    test<gil::abgr8c_step_view_t, gil::abgr_layout_t, Interleaved, StepX, Immutable>();
+    test_not<gil::abgr8_view_t, gil::bgra_layout_t, Interleaved, NotStepX, Mutable>();
+    test_not<gil::abgr8_view_t, gil::rgba_layout_t, Interleaved, NotStepX, Mutable>();
+
+    test<gil::argb8_view_t, gil::argb_layout_t, Interleaved, NotStepX, Mutable>();
+    test<gil::argb8c_view_t, gil::argb_layout_t, Interleaved, NotStepX, Immutable>();
+    test<gil::argb8_step_view_t, gil::argb_layout_t, Interleaved, StepX, Mutable>();
+    test<gil::argb8c_step_view_t, gil::argb_layout_t, Interleaved, StepX, Immutable>();
+
+    test<gil::bgr8_view_t, gil::bgr_layout_t, Interleaved, NotStepX, Mutable>();
+    test<gil::bgr8c_view_t, gil::bgr_layout_t, Interleaved, NotStepX, Immutable>();
+    test<gil::bgr8_step_view_t, gil::bgr_layout_t, Interleaved, StepX, Mutable>();
+    test<gil::bgr8c_step_view_t, gil::bgr_layout_t, Interleaved, StepX, Immutable>();
+    test_not<gil::bgr8_view_t, gil::rgb_layout_t, Interleaved, NotStepX, Mutable>();
+
+    test<gil::bgra8_view_t, gil::bgra_layout_t, Interleaved, NotStepX, Mutable>();
+    test<gil::bgra8c_view_t, gil::bgra_layout_t, Interleaved, NotStepX, Immutable>();
+    test<gil::bgra8_step_view_t, gil::bgra_layout_t, Interleaved, StepX, Mutable>();
+    test<gil::bgra8c_step_view_t, gil::bgra_layout_t, Interleaved, StepX, Immutable>();
+    test_not<gil::bgra8_view_t, gil::abgr_layout_t, Interleaved, NotStepX, Mutable>();
+    test_not<gil::bgra8_view_t, gil::rgba_layout_t, Interleaved, NotStepX, Mutable>();
+
+    test<gil::rgb8_view_t, gil::rgb_layout_t, Interleaved, NotStepX, Mutable>();
+    test<gil::rgb8c_view_t, gil::rgb_layout_t, Interleaved, NotStepX, Immutable>();
+    test<gil::rgb8_step_view_t, gil::rgb_layout_t, Interleaved, StepX, Mutable>();
+    test<gil::rgb8c_step_view_t, gil::rgb_layout_t, Interleaved, StepX, Immutable>();
+    test_not<gil::rgb8_view_t, gil::rgb_layout_t, Planar, NotStepX, Mutable>();
+    test_not<gil::rgb8_view_t, gil::abgr_layout_t, Interleaved, NotStepX, Mutable>();
+    test_not<gil::rgb8_view_t, gil::bgra_layout_t, Interleaved, NotStepX, Mutable>();
+
+    test<gil::rgb8_planar_view_t, gil::rgb_layout_t, Planar, NotStepX, Mutable>();
+    test<gil::rgb8c_planar_view_t, gil::rgb_layout_t, Planar, NotStepX, Immutable>();
+    test<gil::rgb8_planar_step_view_t, gil::rgb_layout_t, Planar, StepX, Mutable>();
+    test<gil::rgb8c_planar_step_view_t, gil::rgb_layout_t, Planar, StepX, Immutable>();
+
+    test<gil::cmyk8_view_t, gil::cmyk_layout_t, Interleaved, NotStepX, Mutable>();
+    test<gil::cmyk8c_view_t, gil::cmyk_layout_t, Interleaved, NotStepX, Immutable>();
+    test<gil::cmyk8_step_view_t, gil::cmyk_layout_t, Interleaved, StepX, Mutable>();
+    test<gil::cmyk8c_step_view_t, gil::cmyk_layout_t, Interleaved, StepX, Immutable>();
+    test_not<gil::cmyk8_view_t, gil::rgba_layout_t, Interleaved, NotStepX, Mutable>();
+
+    test<gil::cmyk8_planar_view_t, gil::cmyk_layout_t, Planar, NotStepX, Mutable>();
+    test<gil::cmyk8c_planar_view_t, gil::cmyk_layout_t, Planar, NotStepX, Immutable>();
+    test<gil::cmyk8_planar_step_view_t, gil::cmyk_layout_t, Planar, StepX, Mutable>();
+    test<gil::cmyk8c_planar_step_view_t, gil::cmyk_layout_t, Planar, StepX, Immutable>();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/view_type_from_pixel.cpp b/src/boost/libs/gil/test/core/image_view/view_type_from_pixel.cpp
new file mode 100644
index 000000000..bb5144095
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/view_type_from_pixel.cpp
@@ -0,0 +1,119 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+struct Interleaved : std::false_type {};
+struct Planar : std::true_type {};
+struct NotStepX : std::false_type {};
+struct StepX : std::true_type {};
+struct Immutable : std::false_type {};
+struct Mutable : std::true_type {};
+
+template <typename ResultView, typename Pixel, typename IsPlanar, typename IsStepX, typename IsMutable>
+void test()
+{
+    static_assert(std::is_same
+    <
+        typename gil::view_type_from_pixel
+        <
+            Pixel,
+            IsPlanar::value,
+            IsStepX::value,
+            IsMutable::value
+        >::type,
+        ResultView
+    >::value, "view_type_from_pixel yields unexpected view");
+}
+
+template <typename ResultView, typename Pixel, typename IsPlanar, typename IsStepX, typename IsMutable>
+void test_not()
+{
+    static_assert(!std::is_same
+    <
+        typename gil::view_type_from_pixel
+        <
+            Pixel,
+            IsPlanar::value,
+            IsStepX::value,
+            IsMutable::value
+        >::type,
+        ResultView
+    >::value, "view_type_from_pixel yields unexpected view");
+}
+
+int main()
+{
+    test<gil::gray8_view_t, gil::gray8_pixel_t, Interleaved, NotStepX, Mutable>();
+    test<gil::gray8c_view_t, gil::gray8c_pixel_t, Interleaved, NotStepX, Immutable>();
+    // Immutable view from mutable pixel type is allowed
+    test<gil::gray8c_view_t, gil::gray8_pixel_t, Interleaved, NotStepX, Immutable>();
+    // Mutable view from immutable pixel type not allowed
+    test_not<gil::gray8_view_t, gil::gray8c_pixel_t, Interleaved, NotStepX, Mutable>();
+
+    test<gil::gray8_step_view_t, gil::gray8_pixel_t, Interleaved, StepX, Mutable>();
+    test_not<gil::gray8_view_t, gil::gray8c_pixel_t, Interleaved, NotStepX, Mutable>();
+    test<gil::gray8c_step_view_t, gil::gray8_pixel_t, Interleaved, StepX, Immutable>();
+    test_not<gil::gray8_view_t, gil::gray8_pixel_t, Planar, NotStepX, Mutable>();
+    test_not<gil::gray8_view_t, gil::rgb8_pixel_t, Planar, NotStepX, Mutable>();
+    test_not<gil::gray8_view_t, gil::gray8_pixel_t, Interleaved, StepX, Mutable>();
+    test_not<gil::gray8_view_t, gil::gray8_pixel_t, Interleaved, NotStepX, Immutable>();
+
+    test<gil::abgr8_view_t, gil::abgr8_pixel_t, Interleaved, NotStepX, Mutable>();
+    test<gil::abgr8c_view_t, gil::abgr8_pixel_t, Interleaved, NotStepX, Immutable>();
+    test<gil::abgr8_step_view_t, gil::abgr8_pixel_t, Interleaved, StepX, Mutable>();
+    test<gil::abgr8c_step_view_t, gil::abgr8_pixel_t, Interleaved, StepX, Immutable>();
+    test_not<gil::abgr8_view_t, gil::bgra8_pixel_t, Interleaved, NotStepX, Mutable>();
+    test_not<gil::abgr8_view_t, gil::rgba8_pixel_t, Interleaved, NotStepX, Mutable>();
+
+    test<gil::argb8_view_t, gil::argb8_pixel_t, Interleaved, NotStepX, Mutable>();
+    test<gil::argb8c_view_t, gil::argb8_pixel_t, Interleaved, NotStepX, Immutable>();
+    test<gil::argb8_step_view_t, gil::argb8_pixel_t, Interleaved, StepX, Mutable>();
+    test<gil::argb8c_step_view_t, gil::argb8_pixel_t, Interleaved, StepX, Immutable>();
+
+    test<gil::bgr8_view_t, gil::bgr8_pixel_t, Interleaved, NotStepX, Mutable>();
+    test<gil::bgr8c_view_t, gil::bgr8_pixel_t, Interleaved, NotStepX, Immutable>();
+    test<gil::bgr8_step_view_t, gil::bgr8_pixel_t, Interleaved, StepX, Mutable>();
+    test<gil::bgr8c_step_view_t, gil::bgr8_pixel_t, Interleaved, StepX, Immutable>();
+    test_not<gil::bgr8_view_t, gil::rgb8_pixel_t, Interleaved, NotStepX, Mutable>();
+
+    test<gil::bgra8_view_t, gil::bgra8_pixel_t, Interleaved, NotStepX, Mutable>();
+    test<gil::bgra8c_view_t, gil::bgra8_pixel_t, Interleaved, NotStepX, Immutable>();
+    test<gil::bgra8_step_view_t, gil::bgra8_pixel_t, Interleaved, StepX, Mutable>();
+    test<gil::bgra8c_step_view_t, gil::bgra8_pixel_t, Interleaved, StepX, Immutable>();
+    test_not<gil::bgra8_view_t, gil::abgr8_pixel_t, Interleaved, NotStepX, Mutable>();
+    test_not<gil::bgra8_view_t, gil::rgba8_pixel_t, Interleaved, NotStepX, Mutable>();
+
+    test<gil::rgb8_view_t, gil::rgb8_pixel_t, Interleaved, NotStepX, Mutable>();
+    test<gil::rgb8c_view_t, gil::rgb8_pixel_t, Interleaved, NotStepX, Immutable>();
+    test<gil::rgb8_step_view_t, gil::rgb8_pixel_t, Interleaved, StepX, Mutable>();
+    test<gil::rgb8c_step_view_t, gil::rgb8_pixel_t, Interleaved, StepX, Immutable>();
+    test_not<gil::rgb8_view_t, gil::rgb8c_pixel_t, Interleaved, NotStepX, Mutable>();
+    test_not<gil::rgb8_view_t, gil::rgb8_pixel_t, Planar, NotStepX, Mutable>();
+    test_not<gil::rgb8_view_t, gil::abgr8_pixel_t, Interleaved, NotStepX, Mutable>();
+    test_not<gil::rgb8_view_t, gil::bgra8_pixel_t, Interleaved, NotStepX, Mutable>();
+
+    test<gil::rgb8_planar_view_t, gil::rgb8_pixel_t, Planar, NotStepX, Mutable>();
+    test<gil::rgb8c_planar_view_t, gil::rgb8_pixel_t, Planar, NotStepX, Immutable>();
+    test<gil::rgb8_planar_step_view_t, gil::rgb8_pixel_t, Planar, StepX, Mutable>();
+    test<gil::rgb8c_planar_step_view_t, gil::rgb8_pixel_t, Planar, StepX, Immutable>();
+
+    test<gil::cmyk8_view_t, gil::cmyk8_pixel_t, Interleaved, NotStepX, Mutable>();
+    test<gil::cmyk8c_view_t, gil::cmyk8_pixel_t, Interleaved, NotStepX, Immutable>();
+    test<gil::cmyk8_step_view_t, gil::cmyk8_pixel_t, Interleaved, StepX, Mutable>();
+    test<gil::cmyk8c_step_view_t, gil::cmyk8_pixel_t, Interleaved, StepX, Immutable>();
+    test_not<gil::cmyk8_view_t, gil::rgba8_pixel_t, Interleaved, NotStepX, Mutable>();
+
+    test<gil::cmyk8_planar_view_t, gil::cmyk8_pixel_t, Planar, NotStepX, Mutable>();
+    test<gil::cmyk8c_planar_view_t, gil::cmyk8_pixel_t, Planar, NotStepX, Immutable>();
+    test<gil::cmyk8_planar_step_view_t, gil::cmyk8_pixel_t, Planar, StepX, Mutable>();
+    test<gil::cmyk8c_planar_step_view_t, gil::cmyk8_pixel_t, Planar, StepX, Immutable>();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/x_iterator.cpp b/src/boost/libs/gil/test/core/image_view/x_iterator.cpp
new file mode 100644
index 000000000..30a73b965
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/x_iterator.cpp
@@ -0,0 +1,98 @@
+//
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/ignore_unused.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_fixture.hpp"
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+void test_x_at()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.x_at(0, 0), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.x_at(1, 0), fixture::gray8_back_pixel);
+        BOOST_TEST_EQ(*view.x_at(1, 1), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.x_at(gil::point_t{0, 0}), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.x_at(gil::point_t{0, 1}), fixture::gray8_back_pixel);
+        BOOST_TEST_EQ(*view.x_at(gil::point_t{1, 1}), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(view.x_at(0, 0), view.row_begin(0));
+        BOOST_TEST_EQ(view.x_at(0, 1), view.row_begin(1));
+        BOOST_TEST_EQ(view.x_at(2, 0), view.row_end(0));
+        BOOST_TEST_EQ(view.x_at(2, 1), view.row_end(1));
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.x_at(0, 0), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.x_at(1, 0), fixture::rgb8_back_pixel);
+        BOOST_TEST_EQ(*view.x_at(1, 1), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.x_at(gil::point_t{0, 0}), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.x_at(gil::point_t{0, 1}), fixture::rgb8_back_pixel);
+        BOOST_TEST_EQ(*view.x_at(gil::point_t{1, 1}), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(view.x_at(0, 0), view.row_begin(0));
+        BOOST_TEST_EQ(view.x_at(0, 1), view.row_begin(1));
+        BOOST_TEST_EQ(view.x_at(2, 0), view.row_end(0));
+        BOOST_TEST_EQ(view.x_at(2, 1), view.row_end(1));
+    }
+}
+
+void test_row_begin()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.row_begin(0), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.row_begin(1), fixture::gray8_back_pixel);
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.row_begin(0), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.row_begin(1), fixture::rgb8_back_pixel);
+    }
+}
+
+void test_row_end()
+{
+    {
+        gil::gray8_image_t image;
+        auto view = gil::view(image);
+#ifdef NDEBUG // skip assertion on y < height(), see TODO comment in image_view.hpp
+        BOOST_TEST_EQ(view.row_begin(0), view.row_end(0));
+#else
+        boost::ignore_unused(view);
+#endif
+    }
+    {
+        gil::rgb8_image_t image;
+        auto view = gil::view(image);
+#ifdef NDEBUG // skip assertion on y < height(), see TODO comment in image_view.hpp
+        BOOST_TEST_EQ(view.row_begin(0), view.row_end(0));
+#else
+        boost::ignore_unused(view);
+#endif
+    }
+}
+
+int main()
+{
+    test_x_at();
+    test_row_begin();
+    test_row_end();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/xy_locator.cpp b/src/boost/libs/gil/test/core/image_view/xy_locator.cpp
new file mode 100644
index 000000000..af42ee641
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/xy_locator.cpp
@@ -0,0 +1,122 @@
+//
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/ignore_unused.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_fixture.hpp"
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+void test_xy_at()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.xy_at(0, 0), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.xy_at(1, 0), fixture::gray8_back_pixel);
+        BOOST_TEST_EQ(*view.xy_at(0, 1), fixture::gray8_back_pixel);
+        BOOST_TEST_EQ(*view.xy_at(1, 1), fixture::gray8_draw_pixel);
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.xy_at(0, 0), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.xy_at(1, 0), fixture::rgb8_back_pixel);
+        BOOST_TEST_EQ(*view.xy_at(0, 1), fixture::rgb8_back_pixel);
+        BOOST_TEST_EQ(*view.xy_at(1, 1), fixture::rgb8_draw_pixel);
+    }
+}
+
+void test_xy_x_begin()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        BOOST_TEST(view.xy_at(0, 0).x() == view.row_begin(0));
+        BOOST_TEST(view.xy_at(0, 1).x() == view.row_begin(1));
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        BOOST_TEST(view.xy_at(0, 0).x() == view.row_begin(0));
+        BOOST_TEST(view.xy_at(0, 1).x() == view.row_begin(1));
+    }
+}
+
+void test_xy_x_end()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+#ifdef NDEBUG // skip assertion on x < width(), see TODO comment in image_view.hpp
+        BOOST_TEST(view.xy_at(2, 0).x() == view.row_end(0));
+        BOOST_TEST(view.xy_at(2, 1).x() == view.row_end(1));
+#else
+        boost::ignore_unused(view);
+#endif
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+#ifdef NDEBUG // skip assertion on x < width(), see TODO comment in image_view.hpp
+        BOOST_TEST(view.xy_at(2, 0).x() == view.row_end(0));
+        BOOST_TEST(view.xy_at(2, 1).x() == view.row_end(1));
+#else
+        boost::ignore_unused(view);
+#endif
+    }
+}
+
+void test_xy_y_begin()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        BOOST_TEST(view.xy_at(0, 0).y() == view.col_begin(0));
+        BOOST_TEST(view.xy_at(1, 0).y() == view.col_begin(1));
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        BOOST_TEST(view.xy_at(0, 0).y() == view.col_begin(0));
+        BOOST_TEST(view.xy_at(1, 0).y() == view.col_begin(1));
+    }
+}
+
+void test_xy_y_end()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        BOOST_TEST(view.xy_at(0, 2).y() == view.col_end(0));
+        BOOST_TEST(view.xy_at(1, 2).y() == view.col_end(1));
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        BOOST_TEST(view.xy_at(0, 2).y() == view.col_end(0));
+        BOOST_TEST(view.xy_at(1, 2).y() == view.col_end(1));
+    }
+}
+
+int main()
+{
+    test_xy_at();
+    test_xy_x_begin();
+    test_xy_x_end();
+    test_xy_y_begin();
+    test_xy_y_end();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/image_view/y_iterator.cpp b/src/boost/libs/gil/test/core/image_view/y_iterator.cpp
new file mode 100644
index 000000000..6070ebd2f
--- /dev/null
+++ b/src/boost/libs/gil/test/core/image_view/y_iterator.cpp
@@ -0,0 +1,118 @@
+//
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/image.hpp>
+#include <boost/gil/image_view.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/core/ignore_unused.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include <vector>
+
+#include "test_fixture.hpp"
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+void test_y_at()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.y_at(0, 0), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.y_at(1, 0), fixture::gray8_back_pixel);
+        BOOST_TEST_EQ(*view.y_at(1, 1), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.y_at(gil::point_t{0, 0}), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.y_at(gil::point_t{0, 1}), fixture::gray8_back_pixel);
+        BOOST_TEST_EQ(*view.y_at(gil::point_t{1, 1}), fixture::gray8_draw_pixel);
+        BOOST_TEST(view.y_at(0, 0) == view.col_begin(0));
+        BOOST_TEST(view.y_at(1, 0) == view.col_begin(1));
+        BOOST_TEST(view.y_at(0, 2) == view.col_end(0));
+        BOOST_TEST(view.y_at(1, 2) == view.col_end(1));
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.y_at(0, 0), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.y_at(1, 0), fixture::rgb8_back_pixel);
+        BOOST_TEST_EQ(*view.y_at(1, 1), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.y_at(gil::point_t{0, 0}), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.y_at(gil::point_t{0, 1}), fixture::rgb8_back_pixel);
+        BOOST_TEST_EQ(*view.y_at(gil::point_t{1, 1}), fixture::rgb8_draw_pixel);
+        BOOST_TEST(view.y_at(0, 0) == view.col_begin(0));
+        BOOST_TEST(view.y_at(1, 0) == view.col_begin(1));
+        BOOST_TEST(view.y_at(0, 2) == view.col_end(0));
+        BOOST_TEST(view.y_at(1, 2) == view.col_end(1));
+    }
+}
+
+void test_col_begin()
+{
+    {
+        gil::gray8_image_t image = fixture::make_image_gray8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.col_begin(0), fixture::gray8_draw_pixel);
+        BOOST_TEST_EQ(*view.col_begin(1), fixture::gray8_back_pixel);
+    }
+    {
+        gil::rgb8_image_t image = fixture::make_image_rgb8();
+        auto view = gil::view(image);
+        BOOST_TEST_EQ(*view.col_begin(0), fixture::rgb8_draw_pixel);
+        BOOST_TEST_EQ(*view.col_begin(1), fixture::rgb8_back_pixel);
+    }
+}
+void test_col_end()
+{
+    {
+        gil::gray8_image_t image;
+        auto view = gil::view(image);
+#ifdef NDEBUG // skip assertion on x < width(), see TODO comment in image_view.hpp
+        BOOST_TEST(view.col_begin(0) == view.col_end(0));
+#else
+        boost::ignore_unused(view);
+#endif
+    }
+    {
+        gil::rgb8_image_t image;
+        auto view = gil::view(image);
+#ifdef NDEBUG // skip assertion on x < width(), see TODO comment in image_view.hpp
+        BOOST_TEST(view.col_begin(0) == view.col_end(0));
+#else
+        boost::ignore_unused(view);
+#endif
+    }
+}
+
+void test_issue_432()
+{
+    // Verifies https://github.com/boostorg/gil/pull/450 fix for https://github.com/boostorg/gil/issues/432
+    // The tests were adapted from contribution of Daniel Evans by Olzhas Zhumabek.
+    {
+        std::vector<gil::gray8_pixel_t> v(50);
+        auto view = boost::gil::interleaved_view(10, 5, v.data(), 10 * sizeof(gil::gray8_pixel_t));
+        view.col_end(0); // BUG: Boost 1.72 always asserts
+    }
+    {
+        std::vector<gil::rgb8_pixel_t> v(50);
+        auto view = boost::gil::interleaved_view(10, 5, v.data(), 10 * sizeof(gil::rgb8_pixel_t));
+        auto it = view.row_end(0); // BUG: Boost 1.72 always asserts
+        boost::ignore_unused(it);
+    }
+}
+
+int main()
+{
+    test_y_at();
+    test_col_begin();
+    test_col_end();
+
+    test_issue_432();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/iterator/CMakeLists.txt b/src/boost/libs/gil/test/core/iterator/CMakeLists.txt
new file mode 100644
index 000000000..cff287e66
--- /dev/null
+++ b/src/boost/libs/gil/test/core/iterator/CMakeLists.txt
@@ -0,0 +1,28 @@
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+foreach(_name
+  concepts
+  dynamic_step
+  is_planar)
+  set(_test t_core_iterator_${_name})
+  set(_target test_core_iterator_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/core/iterator/Jamfile b/src/boost/libs/gil/test/core/iterator/Jamfile
new file mode 100644
index 000000000..8da365c86
--- /dev/null
+++ b/src/boost/libs/gil/test/core/iterator/Jamfile
@@ -0,0 +1,13 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+compile concepts.cpp ;
+compile dynamic_step.cpp ;
+compile is_planar.cpp ;
diff --git a/src/boost/libs/gil/test/core/iterator/concepts.cpp b/src/boost/libs/gil/test/core/iterator/concepts.cpp
new file mode 100644
index 000000000..39f5bc736
--- /dev/null
+++ b/src/boost/libs/gil/test/core/iterator/concepts.cpp
@@ -0,0 +1,172 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// FIXME: Avoid Clang's flooding of non-disableable warnings like:
+// "T does not declare any constructor to initialize its non-modifiable members"
+// when compiling with concepts check enabled.
+// See https://bugs.llvm.org/show_bug.cgi?id=41759
+#if !defined(BOOST_GIL_USE_CONCEPT_CHECK) && !defined(__clang__)
+#error Compile with BOOST_GIL_USE_CONCEPT_CHECK defined
+#endif
+#include <boost/gil/concepts.hpp>
+#include <boost/gil/color_base.hpp> // kth_element_type
+#include <boost/gil/pixel.hpp> // kth_element_type
+#include <boost/gil/pixel_iterator.hpp>
+#include <boost/gil/pixel_iterator_adaptor.hpp>
+#include <boost/gil/planar_pixel_iterator.hpp> // kth_element_type
+#include <boost/gil/planar_pixel_reference.hpp> // kth_element_type
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/concept_check.hpp>
+
+namespace gil = boost::gil;
+using boost::function_requires;
+
+template <typename Iterator>
+void test_immutable()
+{
+    function_requires<gil::PixelIteratorConcept<Iterator>>();
+    function_requires<gil::HasDynamicXStepTypeConcept<Iterator>>();
+    // NOTE: Pixel iterator does not model Y-step
+    //function_requires<gil::HasDynamicYStepTypeConcept<Iterator>>();
+}
+
+template <typename Iterator>
+void test_mutable()
+{
+    function_requires<gil::MutablePixelIteratorConcept<Iterator>>();
+    function_requires<gil::HasDynamicXStepTypeConcept<Iterator>>();
+    // NOTE: Pixel iterator does not model Y-step
+    //function_requires<gil::HasDynamicYStepTypeConcept<Iterator>>();
+}
+
+int main()
+{
+    test_mutable<gil::gray8_ptr_t>();
+    test_mutable<gil::gray8_step_ptr_t>();
+    test_mutable<gil::gray16_ptr_t>();
+    test_mutable<gil::gray16_step_ptr_t>();
+    test_mutable<gil::gray32_ptr_t>();
+    test_mutable<gil::gray32_step_ptr_t>();
+    test_mutable<gil::gray32f_ptr_t>();
+    test_mutable<gil::gray32f_step_ptr_t>();
+    test_immutable<gil::gray8c_ptr_t>();
+    test_immutable<gil::gray8c_step_ptr_t>();
+    test_immutable<gil::gray16c_ptr_t>();
+    test_immutable<gil::gray16c_step_ptr_t>();
+    test_immutable<gil::gray32c_ptr_t>();
+    test_immutable<gil::gray32c_step_ptr_t>();
+    test_immutable<gil::gray32fc_ptr_t>();
+    test_immutable<gil::gray32fc_step_ptr_t>();
+
+    test_mutable<gil::abgr8_ptr_t>();
+    test_mutable<gil::abgr8_step_ptr_t>();
+    test_mutable<gil::abgr16_ptr_t>();
+    test_mutable<gil::abgr16_step_ptr_t>();
+    test_mutable<gil::abgr32_ptr_t>();
+    test_mutable<gil::abgr32_step_ptr_t>();
+    test_mutable<gil::abgr32f_ptr_t>();
+    test_mutable<gil::abgr32f_step_ptr_t>();
+    test_immutable<gil::abgr8c_ptr_t>();
+    test_immutable<gil::abgr8c_step_ptr_t>();
+    test_immutable<gil::abgr16c_ptr_t>();
+    test_immutable<gil::abgr16c_step_ptr_t>();
+    test_immutable<gil::abgr32c_ptr_t>();
+    test_immutable<gil::abgr32c_step_ptr_t>();
+    test_immutable<gil::abgr32fc_ptr_t>();
+    test_immutable<gil::abgr32fc_step_ptr_t>();
+
+    test_mutable<gil::argb8_ptr_t>();
+    test_mutable<gil::argb8_step_ptr_t>();
+    test_mutable<gil::argb16_ptr_t>();
+    test_mutable<gil::argb16_step_ptr_t>();
+    test_mutable<gil::argb32_ptr_t>();
+    test_mutable<gil::argb32_step_ptr_t>();
+    test_mutable<gil::argb32f_ptr_t>();
+    test_mutable<gil::argb32f_step_ptr_t>();
+
+    test_mutable<gil::bgr8_ptr_t>();
+    test_mutable<gil::bgr8_step_ptr_t>();
+    test_mutable<gil::bgr16_ptr_t>();
+    test_mutable<gil::bgr16_step_ptr_t>();
+    test_mutable<gil::bgr32_ptr_t>();
+    test_mutable<gil::bgr32_step_ptr_t>();
+    test_mutable<gil::bgr32f_ptr_t>();
+    test_mutable<gil::bgr32f_step_ptr_t>();
+
+    test_mutable<gil::bgra8_ptr_t>();
+    test_mutable<gil::bgra8_step_ptr_t>();
+    test_mutable<gil::bgra16_ptr_t>();
+    test_mutable<gil::bgra16_step_ptr_t>();
+    test_mutable<gil::bgra32_ptr_t>();
+    test_mutable<gil::bgra32_step_ptr_t>();
+    test_mutable<gil::bgra32f_ptr_t>();
+    test_mutable<gil::bgra32f_step_ptr_t>();
+
+    test_mutable<gil::rgb8_ptr_t>();
+    test_mutable<gil::rgb8_step_ptr_t>();
+    test_mutable<gil::rgb8_planar_ptr_t>();
+    test_mutable<gil::rgb8_planar_step_ptr_t>();
+    test_mutable<gil::rgb16_ptr_t>();
+    test_mutable<gil::rgb16_step_ptr_t>();
+    test_mutable<gil::rgb16_planar_ptr_t>();
+    test_mutable<gil::rgb16_planar_step_ptr_t>();
+    test_mutable<gil::rgb32_ptr_t>();
+    test_mutable<gil::rgb32_step_ptr_t>();
+    test_mutable<gil::rgb32_planar_ptr_t>();
+    test_mutable<gil::rgb32_planar_step_ptr_t>();
+    test_mutable<gil::rgb32f_ptr_t>();
+    test_mutable<gil::rgb32f_step_ptr_t>();
+    test_mutable<gil::rgb32f_planar_ptr_t>();
+    test_mutable<gil::rgb32f_planar_step_ptr_t>();
+    test_immutable<gil::rgb8c_ptr_t>();
+    test_immutable<gil::rgb8c_step_ptr_t>();
+    test_immutable<gil::rgb16c_ptr_t>();
+    test_immutable<gil::rgb16c_step_ptr_t>();
+    test_immutable<gil::rgb32c_ptr_t>();
+    test_immutable<gil::rgb32c_step_ptr_t>();
+    test_immutable<gil::rgb32fc_ptr_t>();
+    test_immutable<gil::rgb32fc_step_ptr_t>();
+
+    test_mutable<gil::rgba8_ptr_t>();
+    test_mutable<gil::rgba8_step_ptr_t>();
+    test_mutable<gil::rgba8_planar_ptr_t>();
+    test_mutable<gil::rgba8_planar_step_ptr_t>();
+    test_mutable<gil::rgba16_ptr_t>();
+    test_mutable<gil::rgba16_step_ptr_t>();
+    test_mutable<gil::rgba16_planar_ptr_t>();
+    test_mutable<gil::rgba16_planar_step_ptr_t>();
+    test_mutable<gil::rgba32_ptr_t>();
+    test_mutable<gil::rgba32_step_ptr_t>();
+    test_mutable<gil::rgba32_planar_ptr_t>();
+    test_mutable<gil::rgba32_planar_step_ptr_t>();
+    test_mutable<gil::rgba32f_ptr_t>();
+    test_mutable<gil::rgba32f_step_ptr_t>();
+    test_mutable<gil::rgba32f_planar_ptr_t>();
+    test_mutable<gil::rgba32f_planar_step_ptr_t>();
+
+    test_mutable<gil::cmyk8_ptr_t>();
+    test_mutable<gil::cmyk8_step_ptr_t>();
+    test_mutable<gil::cmyk8_planar_ptr_t>();
+    test_mutable<gil::cmyk8_planar_step_ptr_t>();
+    test_mutable<gil::cmyk16_ptr_t>();
+    test_mutable<gil::cmyk16_step_ptr_t>();
+    test_mutable<gil::cmyk16_planar_ptr_t>();
+    test_mutable<gil::cmyk16_planar_step_ptr_t>();
+    test_mutable<gil::cmyk32_ptr_t>();
+    test_mutable<gil::cmyk32_step_ptr_t>();
+    test_mutable<gil::cmyk32_planar_ptr_t>();
+    test_mutable<gil::cmyk32_planar_step_ptr_t>();
+    test_mutable<gil::cmyk32f_ptr_t>();
+    test_mutable<gil::cmyk32f_step_ptr_t>();
+    test_mutable<gil::cmyk32f_planar_ptr_t>();
+    test_mutable<gil::cmyk32f_planar_step_ptr_t>();
+    test_immutable<gil::cmyk8c_ptr_t>();
+    test_immutable<gil::cmyk8c_step_ptr_t>();
+    test_immutable<gil::cmyk8c_planar_ptr_t>();
+    test_immutable<gil::cmyk8c_planar_step_ptr_t>();
+}
diff --git a/src/boost/libs/gil/test/core/iterator/dynamic_step.cpp b/src/boost/libs/gil/test/core/iterator/dynamic_step.cpp
new file mode 100644
index 000000000..269c7306b
--- /dev/null
+++ b/src/boost/libs/gil/test/core/iterator/dynamic_step.cpp
@@ -0,0 +1,160 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/dynamic_step.hpp>
+#include <boost/gil/color_base.hpp> // kth_element_type
+#include <boost/gil/pixel.hpp> // kth_element_type
+#include <boost/gil/pixel_iterator.hpp>
+#include <boost/gil/pixel_iterator_adaptor.hpp>
+#include <boost/gil/planar_pixel_iterator.hpp> // kth_element_type
+#include <boost/gil/planar_pixel_reference.hpp> // kth_element_type
+#include <boost/gil/step_iterator.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+// NOTE: Iterator does not model HasDynamicYStepTypeConcept
+// TODO: Add compile-fail tests to verify that.
+
+template <typename Iterator>
+void test_non_step()
+{
+    static_assert(std::is_same
+        <
+            gil::memory_based_step_iterator<Iterator>,
+            typename gil::dynamic_x_step_type<Iterator>::type
+        >::value, "iterator does not model HasDynamicXStepTypeConcept");
+
+    static_assert(!std::is_same
+        <
+            Iterator,
+            typename gil::dynamic_x_step_type<Iterator>::type
+        >::value, "dynamic_x_step_type yields X step iterator, not X iterator");
+}
+
+template <typename Iterator>
+void test_step()
+{
+    static_assert(std::is_same
+        <
+            Iterator,
+            typename gil::dynamic_x_step_type<Iterator>::type
+        >::value, "iterator does not model HasDynamicXStepTypeConcept");
+
+    static_assert(!std::is_same
+        <
+            typename Iterator::x_iterator,
+            typename gil::dynamic_x_step_type<gil::gray8_step_ptr_t>::type
+        >::value, "dynamic_x_step_type yields X step iterator, not X iterator");
+}
+
+int main()
+{
+    test_non_step<gil::gray8_ptr_t>();
+    test_non_step<gil::gray8c_ptr_t>();
+    test_non_step<gil::gray16_ptr_t>();
+    test_non_step<gil::gray16c_ptr_t>();
+    test_non_step<gil::gray32_ptr_t>();
+    test_non_step<gil::gray32c_ptr_t>();
+    test_non_step<gil::gray32f_ptr_t>();
+    test_step<gil::gray8_step_ptr_t>();
+    test_step<gil::gray8c_step_ptr_t>();
+    test_step<gil::gray16_step_ptr_t>();
+    test_step<gil::gray16c_step_ptr_t>();
+    test_step<gil::gray32_step_ptr_t>();
+    test_step<gil::gray32c_step_ptr_t>();
+    test_step<gil::gray32f_step_ptr_t>();
+
+    test_non_step<gil::abgr8_ptr_t>();
+    test_non_step<gil::abgr16_ptr_t>();
+    test_non_step<gil::abgr32_ptr_t>();
+    test_non_step<gil::abgr32f_ptr_t>();
+    test_step<gil::abgr8_step_ptr_t>();
+    test_step<gil::abgr16_step_ptr_t>();
+    test_step<gil::abgr32_step_ptr_t>();
+    test_step<gil::abgr32f_step_ptr_t>();
+
+    test_non_step<gil::argb8_ptr_t>();
+    test_non_step<gil::argb16_ptr_t>();
+    test_non_step<gil::argb32_ptr_t>();
+    test_non_step<gil::argb32f_ptr_t>();
+    test_step<gil::argb8_step_ptr_t>();
+    test_step<gil::argb16_step_ptr_t>();
+    test_step<gil::argb32_step_ptr_t>();
+    test_step<gil::argb32f_step_ptr_t>();
+
+    test_non_step<gil::bgr8_ptr_t>();
+    test_non_step<gil::bgr16_ptr_t>();
+    test_non_step<gil::bgr32_ptr_t>();
+    test_non_step<gil::bgr32f_ptr_t>();
+    test_step<gil::bgr8_step_ptr_t>();
+    test_step<gil::bgr16_step_ptr_t>();
+    test_step<gil::bgr32_step_ptr_t>();
+    test_step<gil::bgr32f_step_ptr_t>();
+
+    test_non_step<gil::bgra8_ptr_t>();
+    test_non_step<gil::bgra16_ptr_t>();
+    test_non_step<gil::bgra32_ptr_t>();
+    test_non_step<gil::bgra32f_ptr_t>();
+    test_step<gil::bgra8_step_ptr_t>();
+    test_step<gil::bgra16_step_ptr_t>();
+    test_step<gil::bgra32_step_ptr_t>();
+    test_step<gil::bgra32f_step_ptr_t>();
+
+    test_non_step<gil::rgb8_ptr_t>();
+    test_non_step<gil::rgb8_planar_ptr_t>();
+    test_non_step<gil::rgb16_ptr_t>();
+    test_non_step<gil::rgb16_planar_ptr_t>();
+    test_non_step<gil::rgb32_ptr_t>();
+    test_non_step<gil::rgb32_planar_ptr_t>();
+    test_non_step<gil::rgb32f_ptr_t>();
+    test_non_step<gil::rgb32f_planar_ptr_t>();
+    test_step<gil::rgb8_step_ptr_t>();
+    test_step<gil::rgb8_planar_step_ptr_t>();
+    test_step<gil::rgb16_step_ptr_t>();
+    test_step<gil::rgb16_planar_step_ptr_t>();
+    test_step<gil::rgb32_step_ptr_t>();
+    test_step<gil::rgb32_planar_step_ptr_t>();
+    test_step<gil::rgb32f_step_ptr_t>();
+    test_step<gil::rgb32f_planar_step_ptr_t>();
+
+    test_non_step<gil::rgba8_ptr_t>();
+    test_non_step<gil::rgba8_planar_ptr_t>();
+    test_non_step<gil::rgba16_ptr_t>();
+    test_non_step<gil::rgba16_planar_ptr_t>();
+    test_non_step<gil::rgba32_ptr_t>();
+    test_non_step<gil::rgba32_planar_ptr_t>();
+    test_non_step<gil::rgba32f_ptr_t>();
+    test_non_step<gil::rgba32f_planar_ptr_t>();
+    test_step<gil::rgba8_step_ptr_t>();
+    test_step<gil::rgba8_planar_step_ptr_t>();
+    test_step<gil::rgba16_step_ptr_t>();
+    test_step<gil::rgba16_planar_step_ptr_t>();
+    test_step<gil::rgba32_step_ptr_t>();
+    test_step<gil::rgba32_planar_step_ptr_t>();
+    test_step<gil::rgba32f_step_ptr_t>();
+    test_step<gil::rgba32f_planar_step_ptr_t>();
+
+    test_non_step<gil::cmyk8_ptr_t>();
+    test_non_step<gil::cmyk8_planar_ptr_t>();
+    test_non_step<gil::cmyk16_ptr_t>();
+    test_non_step<gil::cmyk16_planar_ptr_t>();
+    test_non_step<gil::cmyk32_ptr_t>();
+    test_non_step<gil::cmyk32_planar_ptr_t>();
+    test_non_step<gil::cmyk32f_ptr_t>();
+    test_non_step<gil::cmyk32f_planar_ptr_t>();
+    test_step<gil::cmyk8_step_ptr_t>();
+    test_step<gil::cmyk8_planar_step_ptr_t>();
+    test_step<gil::cmyk16_step_ptr_t>();
+    test_step<gil::cmyk16_planar_step_ptr_t>();
+    test_step<gil::cmyk32_step_ptr_t>();
+    test_step<gil::cmyk32_planar_step_ptr_t>();
+    test_step<gil::cmyk32f_step_ptr_t>();
+    test_step<gil::cmyk32f_planar_step_ptr_t>();
+}
diff --git a/src/boost/libs/gil/test/core/iterator/is_planar.cpp b/src/boost/libs/gil/test/core/iterator/is_planar.cpp
new file mode 100644
index 000000000..240e5854b
--- /dev/null
+++ b/src/boost/libs/gil/test/core/iterator/is_planar.cpp
@@ -0,0 +1,72 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/pixel.hpp>
+#include <boost/gil/planar_pixel_iterator.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/mp11.hpp>
+
+namespace gil = boost::gil;
+using namespace boost::mp11;
+
+int main()
+{
+    using iterators = mp_list
+    <
+        gil::planar_pixel_iterator<gil::rgb8_view_t*, gil::rgb_t>,
+        gil::rgb8_planar_ptr_t,
+        gil::rgb8_planar_step_ptr_t,
+        gil::rgb8c_planar_ptr_t,
+        gil::rgb8c_planar_step_ptr_t,
+        gil::rgb16_planar_ptr_t,
+        gil::rgb16c_planar_ptr_t,
+        gil::rgb16s_planar_ptr_t,
+        gil::rgb16sc_planar_ptr_t,
+        gil::rgb32_planar_ptr_t,
+        gil::rgb32c_planar_ptr_t,
+        gil::rgb32f_planar_ptr_t,
+        gil::rgb32fc_planar_ptr_t,
+        gil::rgb32s_planar_ptr_t,
+        gil::rgb32sc_planar_ptr_t,
+        gil::cmyk8_planar_ptr_t,
+        gil::cmyk8c_planar_ptr_t,
+        gil::cmyk8s_planar_ptr_t,
+        gil::cmyk8sc_planar_ptr_t,
+        gil::cmyk16_planar_ptr_t,
+        gil::cmyk16c_planar_ptr_t,
+        gil::cmyk16s_planar_ptr_t,
+        gil::cmyk16sc_planar_ptr_t,
+        gil::cmyk32_planar_ptr_t,
+        gil::cmyk32c_planar_ptr_t,
+        gil::cmyk32f_planar_ptr_t,
+        gil::cmyk32fc_planar_ptr_t,
+        gil::cmyk32s_planar_ptr_t,
+        gil::cmyk32sc_planar_ptr_t,
+        gil::rgba8_planar_ptr_t,
+        gil::rgba8c_planar_ptr_t,
+        gil::rgba8s_planar_ptr_t,
+        gil::rgba8sc_planar_ptr_t,
+        gil::rgba16_planar_ptr_t,
+        gil::rgba16c_planar_ptr_t,
+        gil::rgba16s_planar_ptr_t,
+        gil::rgba16sc_planar_ptr_t,
+        gil::rgba32_planar_ptr_t,
+        gil::rgba32c_planar_ptr_t,
+        gil::rgba32f_planar_ptr_t,
+        gil::rgba32fc_planar_ptr_t,
+        gil::rgba32s_planar_ptr_t,
+        gil::rgba32sc_planar_ptr_t
+    >;
+
+    static_assert(std::is_same
+        <
+            mp_all_of<iterators, gil::is_planar>,
+            std::true_type
+        >::value,
+        "is_planar yields true for non-planar pixel iterator");
+}
diff --git a/src/boost/libs/gil/test/core/locator/CMakeLists.txt b/src/boost/libs/gil/test/core/locator/CMakeLists.txt
new file mode 100644
index 000000000..b9beac82f
--- /dev/null
+++ b/src/boost/libs/gil/test/core/locator/CMakeLists.txt
@@ -0,0 +1,27 @@
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+foreach(_name
+  concepts
+  dynamic_step)
+  set(_test t_core_locator_${_name})
+  set(_target test_core_locator_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/core/locator/Jamfile b/src/boost/libs/gil/test/core/locator/Jamfile
new file mode 100644
index 000000000..54e8e5aeb
--- /dev/null
+++ b/src/boost/libs/gil/test/core/locator/Jamfile
@@ -0,0 +1,12 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+compile concepts.cpp ;
+compile dynamic_step.cpp ;
diff --git a/src/boost/libs/gil/test/core/locator/concepts.cpp b/src/boost/libs/gil/test/core/locator/concepts.cpp
new file mode 100644
index 000000000..bf72d2c9e
--- /dev/null
+++ b/src/boost/libs/gil/test/core/locator/concepts.cpp
@@ -0,0 +1,202 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// FIXME: Avoid Clang's flooding of non-disableable warnings like:
+// "T does not declare any constructor to initialize its non-modifiable members"
+// when compiling with concepts check enabled.
+// See https://bugs.llvm.org/show_bug.cgi?id=41759
+#if !defined(BOOST_GIL_USE_CONCEPT_CHECK) && !defined(__clang__)
+#error Compile with BOOST_GIL_USE_CONCEPT_CHECK defined
+#endif
+#include <boost/gil/concepts.hpp>
+#include <boost/gil/locator.hpp>
+#include <boost/gil/planar_pixel_reference.hpp>
+#include <boost/gil/typedefs.hpp>
+#include <boost/gil/virtual_locator.hpp>
+
+#include <boost/concept_check.hpp>
+
+namespace gil = boost::gil;
+using boost::function_requires;
+
+template <typename Locator>
+void test_immutable()
+{
+    function_requires<gil::PixelLocatorConcept<Locator>>();
+    function_requires<gil::HasDynamicXStepTypeConcept<Locator>>();
+    function_requires<gil::HasDynamicYStepTypeConcept<Locator>>();
+}
+
+template <typename Locator>
+void test_mutable()
+{
+    function_requires<gil::MutablePixelLocatorConcept<Locator>>();
+    function_requires<gil::HasDynamicXStepTypeConcept<Locator>>();
+    function_requires<gil::HasDynamicYStepTypeConcept<Locator>>();
+}
+
+template <typename Pixel>
+struct archetype_pixel_dereference
+{
+    using point_t = gil::point_t;
+    using const_t = archetype_pixel_dereference;
+    using value_type = Pixel;
+    using reference = value_type;
+    using const_reference = value_type;
+    using argument_type = gil::point_t;
+    using result_type = reference;
+    static constexpr bool is_mutable = false;
+    result_type operator()(argument_type const&) const { return result_type{}; }
+};
+
+template <typename Pixel>
+using virtual_locator = gil::virtual_2d_locator<archetype_pixel_dereference<Pixel>, false>;
+
+int main()
+{
+    test_mutable<gil::gray8_loc_t>();
+    test_mutable<gil::gray8_step_loc_t>();
+    test_mutable<gil::gray16_loc_t>();
+    test_mutable<gil::gray16_step_loc_t>();
+    test_mutable<gil::gray32_loc_t>();
+    test_mutable<gil::gray32_step_loc_t>();
+    test_mutable<gil::gray32f_loc_t>();
+    test_mutable<gil::gray32f_step_loc_t>();
+    test_immutable<gil::gray8c_loc_t>();
+    test_immutable<gil::gray8c_step_loc_t>();
+    test_immutable<gil::gray16c_loc_t>();
+    test_immutable<gil::gray16c_step_loc_t>();
+    test_immutable<gil::gray32c_loc_t>();
+    test_immutable<gil::gray32c_step_loc_t>();
+    test_immutable<gil::gray32fc_loc_t>();
+    test_immutable<gil::gray32fc_step_loc_t>();
+
+    test_mutable<gil::memory_based_2d_locator<gil::gray8_step_ptr_t>>();
+    test_immutable<gil::memory_based_2d_locator<gil::gray8c_step_ptr_t>>();
+    test_mutable<virtual_locator<gil::gray8_pixel_t>>();
+    test_immutable<virtual_locator<gil::gray8c_pixel_t>>();
+
+    test_mutable<gil::abgr8_loc_t>();
+    test_mutable<gil::abgr8_step_loc_t>();
+    test_mutable<gil::memory_based_2d_locator<gil::abgr8_step_ptr_t>>();
+    test_mutable<gil::abgr16_loc_t>();
+    test_mutable<gil::abgr16_step_loc_t>();
+    test_mutable<gil::abgr32_loc_t>();
+    test_mutable<gil::abgr32_step_loc_t>();
+    test_mutable<gil::abgr32f_loc_t>();
+    test_mutable<gil::abgr32f_step_loc_t>();
+    test_immutable<gil::abgr8c_loc_t>();
+    test_immutable<gil::abgr8c_step_loc_t>();
+    test_immutable<gil::memory_based_2d_locator<gil::abgr8c_step_ptr_t>>();
+    test_immutable<gil::abgr16c_loc_t>();
+    test_immutable<gil::abgr16c_step_loc_t>();
+    test_immutable<gil::abgr32c_loc_t>();
+    test_immutable<gil::abgr32c_step_loc_t>();
+    test_immutable<gil::abgr32fc_loc_t>();
+    test_immutable<gil::abgr32fc_step_loc_t>();
+
+    test_mutable<gil::argb8_loc_t>();
+    test_mutable<gil::argb8_step_loc_t>();
+    test_mutable<gil::memory_based_2d_locator<gil::argb8_step_ptr_t>>();
+    test_mutable<gil::argb16_loc_t>();
+    test_mutable<gil::argb16_step_loc_t>();
+    test_mutable<gil::argb32_loc_t>();
+    test_mutable<gil::argb32_step_loc_t>();
+    test_mutable<gil::argb32f_loc_t>();
+    test_mutable<gil::argb32f_step_loc_t>();
+
+    test_mutable<gil::bgr8_loc_t>();
+    test_mutable<gil::bgr8_step_loc_t>();
+    test_mutable<gil::memory_based_2d_locator<gil::bgr8_step_ptr_t>>();
+    test_mutable<gil::bgr16_loc_t>();
+    test_mutable<gil::bgr16_step_loc_t>();
+    test_mutable<gil::bgr32_loc_t>();
+    test_mutable<gil::bgr32_step_loc_t>();
+    test_mutable<gil::bgr32f_loc_t>();
+    test_mutable<gil::bgr32f_step_loc_t>();
+
+    test_mutable<gil::bgra8_loc_t>();
+    test_mutable<gil::bgra8_step_loc_t>();
+    test_mutable<gil::memory_based_2d_locator<gil::bgra8_step_ptr_t>>();
+    test_mutable<gil::bgra16_loc_t>();
+    test_mutable<gil::bgra16_step_loc_t>();
+    test_mutable<gil::bgra32_loc_t>();
+    test_mutable<gil::bgra32_step_loc_t>();
+    test_mutable<gil::bgra32f_loc_t>();
+    test_mutable<gil::bgra32f_step_loc_t>();
+
+    test_mutable<gil::rgb8_loc_t>();
+    test_mutable<gil::rgb8_step_loc_t>();
+    test_mutable<gil::rgb8_planar_loc_t>();
+    test_mutable<gil::rgb8_planar_step_loc_t>();
+    test_mutable<gil::rgb16_loc_t>();
+    test_mutable<gil::rgb16_step_loc_t>();
+    test_mutable<gil::rgb16_planar_loc_t>();
+    test_mutable<gil::rgb16_planar_step_loc_t>();
+    test_mutable<gil::rgb32_loc_t>();
+    test_mutable<gil::rgb32_step_loc_t>();
+    test_mutable<gil::rgb32_planar_loc_t>();
+    test_mutable<gil::rgb32_planar_step_loc_t>();
+    test_mutable<gil::rgb32f_loc_t>();
+    test_mutable<gil::rgb32f_step_loc_t>();
+    test_mutable<gil::rgb32f_planar_loc_t>();
+    test_mutable<gil::rgb32f_planar_step_loc_t>();
+    test_immutable<gil::rgb8c_loc_t>();
+    test_immutable<gil::rgb8c_step_loc_t>();
+    test_immutable<gil::rgb16c_loc_t>();
+    test_immutable<gil::rgb16c_step_loc_t>();
+    test_immutable<gil::rgb32c_loc_t>();
+    test_immutable<gil::rgb32c_step_loc_t>();
+    test_immutable<gil::rgb32fc_loc_t>();
+    test_immutable<gil::rgb32fc_step_loc_t>();
+
+    test_mutable<gil::memory_based_2d_locator<gil::rgb8_step_ptr_t>>();
+    test_immutable<gil::memory_based_2d_locator<gil::rgb8c_step_ptr_t>>();
+    test_mutable<virtual_locator<gil::rgb8_pixel_t>>();
+    test_immutable<virtual_locator<gil::rgb8c_pixel_t>>();
+
+    test_mutable<gil::rgba8_loc_t>();
+    test_mutable<gil::rgba8_step_loc_t>();
+    test_mutable<gil::rgba8_planar_loc_t>();
+    test_mutable<gil::rgba8_planar_step_loc_t>();
+    test_mutable<gil::memory_based_2d_locator<gil::rgba8_step_ptr_t>>();
+    test_mutable<gil::rgba16_loc_t>();
+    test_mutable<gil::rgba16_step_loc_t>();
+    test_mutable<gil::rgba16_planar_loc_t>();
+    test_mutable<gil::rgba16_planar_step_loc_t>();
+    test_mutable<gil::rgba32_loc_t>();
+    test_mutable<gil::rgba32_step_loc_t>();
+    test_mutable<gil::rgba32_planar_loc_t>();
+    test_mutable<gil::rgba32_planar_step_loc_t>();
+    test_mutable<gil::rgba32f_loc_t>();
+    test_mutable<gil::rgba32f_step_loc_t>();
+    test_mutable<gil::rgba32f_planar_loc_t>();
+    test_mutable<gil::rgba32f_planar_step_loc_t>();
+
+    test_mutable<gil::cmyk8_loc_t>();
+    test_mutable<gil::cmyk8_step_loc_t>();
+    test_mutable<gil::cmyk8_planar_loc_t>();
+    test_mutable<gil::cmyk8_planar_step_loc_t>();
+    test_mutable<gil::memory_based_2d_locator<gil::cmyk8_step_ptr_t>>();
+    test_mutable<gil::cmyk16_loc_t>();
+    test_mutable<gil::cmyk16_step_loc_t>();
+    test_mutable<gil::cmyk16_planar_loc_t>();
+    test_mutable<gil::cmyk16_planar_step_loc_t>();
+    test_mutable<gil::cmyk32_loc_t>();
+    test_mutable<gil::cmyk32_step_loc_t>();
+    test_mutable<gil::cmyk32_planar_loc_t>();
+    test_mutable<gil::cmyk32_planar_step_loc_t>();
+    test_mutable<gil::cmyk32f_loc_t>();
+    test_mutable<gil::cmyk32f_step_loc_t>();
+    test_mutable<gil::cmyk32f_planar_loc_t>();
+    test_mutable<gil::cmyk32f_planar_step_loc_t>();
+    test_immutable<gil::cmyk8c_loc_t>();
+    test_immutable<gil::cmyk8c_step_loc_t>();
+    test_immutable<gil::cmyk8c_planar_loc_t>();
+    test_immutable<gil::cmyk8c_planar_step_loc_t>();
+    test_immutable<gil::memory_based_2d_locator<gil::cmyk8c_step_ptr_t>>();
+}
diff --git a/src/boost/libs/gil/test/core/locator/dynamic_step.cpp b/src/boost/libs/gil/test/core/locator/dynamic_step.cpp
new file mode 100644
index 000000000..c19d8093a
--- /dev/null
+++ b/src/boost/libs/gil/test/core/locator/dynamic_step.cpp
@@ -0,0 +1,92 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/dynamic_step.hpp>
+#include <boost/gil/color_base.hpp> // kth_element_type
+#include <boost/gil/pixel.hpp> // kth_element_type
+#include <boost/gil/locator.hpp>
+#include <boost/gil/pixel_iterator.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+template <typename Locator>
+void test_locator_from_iterator()
+{
+    // The `memory_based_2d_locator` for X-step is calculated based on adapted iterator
+    // Only verify `type` member is available (i.e. specialization defined).
+    static_assert(std::is_class
+        <
+            typename gil::dynamic_x_step_type<Locator>::type
+        >::value, "");
+
+    static_assert(std::is_same
+        <
+            Locator,
+            typename gil::dynamic_y_step_type<Locator>::type
+        >::value, "locator does not model HasDynamicYStepTypeConcept");
+}
+
+int main()
+{
+    test_locator_from_iterator<gil::gray8_loc_t>();
+    test_locator_from_iterator<gil::gray8c_loc_t>();
+    test_locator_from_iterator<gil::gray16_loc_t>();
+    test_locator_from_iterator<gil::gray16c_loc_t>();
+    test_locator_from_iterator<gil::gray32_loc_t>();
+    test_locator_from_iterator<gil::gray32c_loc_t>();
+    test_locator_from_iterator<gil::gray32f_loc_t>();
+
+    test_locator_from_iterator<gil::abgr8_loc_t>();
+    test_locator_from_iterator<gil::abgr16_loc_t>();
+    test_locator_from_iterator<gil::abgr32_loc_t>();
+    test_locator_from_iterator<gil::abgr32f_loc_t>();
+
+    test_locator_from_iterator<gil::argb8_loc_t>();
+    test_locator_from_iterator<gil::argb16_loc_t>();
+    test_locator_from_iterator<gil::argb32_loc_t>();
+    test_locator_from_iterator<gil::argb32f_loc_t>();
+
+    test_locator_from_iterator<gil::bgr8_loc_t>();
+    test_locator_from_iterator<gil::bgr16_loc_t>();
+    test_locator_from_iterator<gil::bgr32_loc_t>();
+    test_locator_from_iterator<gil::bgr32f_loc_t>();
+
+    test_locator_from_iterator<gil::bgra8_loc_t>();
+    test_locator_from_iterator<gil::bgra16_loc_t>();
+    test_locator_from_iterator<gil::bgra32_loc_t>();
+    test_locator_from_iterator<gil::bgra32f_loc_t>();
+
+    test_locator_from_iterator<gil::rgb8_loc_t>();
+    test_locator_from_iterator<gil::rgb8_planar_loc_t>();
+    test_locator_from_iterator<gil::rgb16_loc_t>();
+    test_locator_from_iterator<gil::rgb16_planar_loc_t>();
+    test_locator_from_iterator<gil::rgb32_loc_t>();
+    test_locator_from_iterator<gil::rgb32_planar_loc_t>();
+    test_locator_from_iterator<gil::rgb32f_loc_t>();
+    test_locator_from_iterator<gil::rgb32f_planar_loc_t>();
+
+    test_locator_from_iterator<gil::rgba8_loc_t>();
+    test_locator_from_iterator<gil::rgba8_planar_loc_t>();
+    test_locator_from_iterator<gil::rgba16_loc_t>();
+    test_locator_from_iterator<gil::rgba16_planar_loc_t>();
+    test_locator_from_iterator<gil::rgba32_loc_t>();
+    test_locator_from_iterator<gil::rgba32_planar_loc_t>();
+    test_locator_from_iterator<gil::rgba32f_loc_t>();
+    test_locator_from_iterator<gil::rgba32f_planar_loc_t>();
+
+    test_locator_from_iterator<gil::cmyk8_loc_t>();
+    test_locator_from_iterator<gil::cmyk8_planar_loc_t>();
+    test_locator_from_iterator<gil::cmyk16_loc_t>();
+    test_locator_from_iterator<gil::cmyk16_planar_loc_t>();
+    test_locator_from_iterator<gil::cmyk32_loc_t>();
+    test_locator_from_iterator<gil::cmyk32_planar_loc_t>();
+    test_locator_from_iterator<gil::cmyk32f_loc_t>();
+    test_locator_from_iterator<gil::cmyk32f_planar_loc_t>();
+}
diff --git a/src/boost/libs/gil/test/core/pixel/CMakeLists.txt b/src/boost/libs/gil/test/core/pixel/CMakeLists.txt
new file mode 100644
index 000000000..8f90a72be
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/CMakeLists.txt
@@ -0,0 +1,34 @@
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+foreach(_name
+  concepts
+  bit_aligned_pixel_reference
+  is_pixel
+  is_planar
+  num_channels
+  packed_pixel
+  pixel_reference_is_mutable
+  pixels_are_compatible
+  test_fixture)
+  set(_test t_core_pixel_${_name})
+  set(_target test_core_pixel_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/core/pixel/Jamfile b/src/boost/libs/gil/test/core/pixel/Jamfile
new file mode 100644
index 000000000..724565236
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/Jamfile
@@ -0,0 +1,20 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+compile bit_aligned_pixel_reference.cpp ;
+compile concepts.cpp ;
+compile is_pixel.cpp ;
+compile is_planar.cpp ;
+compile num_channels.cpp ;
+compile pixel_reference_is_mutable.cpp ;
+compile pixels_are_compatible.cpp ;
+
+run packed_pixel.cpp ;
+run test_fixture.cpp ;
diff --git a/src/boost/libs/gil/test/core/pixel/bit_aligned_pixel_reference.cpp b/src/boost/libs/gil/test/core/pixel/bit_aligned_pixel_reference.cpp
new file mode 100644
index 000000000..8f834e695
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/bit_aligned_pixel_reference.cpp
@@ -0,0 +1,46 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/bit_aligned_pixel_reference.hpp>
+#include <boost/gil/packed_pixel.hpp>
+#include <boost/gil/rgb.hpp>
+#include <boost/mp11.hpp>
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+int main()
+{
+    using bgr121_ref_t = gil::bit_aligned_pixel_reference
+        <
+            std::uint8_t, mp11::mp_list_c<int, 1, 2, 1>, gil::bgr_layout_t, true
+        >;
+
+    static_assert(bgr121_ref_t::bit_size == 4,
+        "bit size should be 4");
+
+    static_assert(std::is_same<bgr121_ref_t::bitfield_t, std::uint8_t>::value,
+        "bit field type should be std::uint8_t");
+
+    static_assert(std::is_same<bgr121_ref_t::layout_t, gil::bgr_layout_t>::value,
+        "layout type should be bgr");
+
+    static_assert(std::is_same<decltype(bgr121_ref_t::is_mutable), bool const>::value &&
+        bgr121_ref_t::is_mutable,
+        "is_mutable should be boolean");
+
+    using packed_pixel_t = gil::packed_pixel
+        <
+            std::uint8_t,
+            typename gil::detail::packed_channel_references_vector_type
+            <
+                std::uint8_t, mp11::mp_list_c<int, 1, 2, 1>
+            >::type,
+            gil::bgr_layout_t
+        >;
+    static_assert(std::is_same<bgr121_ref_t::value_type, packed_pixel_t>::value,
+        "value_type should be specialization of packed_pixel");
+}
diff --git a/src/boost/libs/gil/test/core/pixel/concepts.cpp b/src/boost/libs/gil/test/core/pixel/concepts.cpp
new file mode 100644
index 000000000..7543ec60f
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/concepts.cpp
@@ -0,0 +1,67 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// FIXME: Avoid Clang's flooding of non-disableable warnings like:
+// "T does not declare any constructor to initialize its non-modifiable members"
+// when compiling with concepts check enabled.
+// See https://bugs.llvm.org/show_bug.cgi?id=41759
+#if !defined(BOOST_GIL_USE_CONCEPT_CHECK) && !defined(__clang__)
+#error Compile with BOOST_GIL_USE_CONCEPT_CHECK defined
+#endif
+#include <boost/gil.hpp>
+
+#include <boost/concept_check.hpp>
+#include <boost/mp11.hpp>
+
+#include "test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+using boost::function_requires;
+
+template <template<typename> class Concept>
+struct assert_concept
+{
+    template <typename Pixel>
+    void operator()(Pixel&&)
+    {
+        function_requires<Concept<Pixel>>();
+    }
+};
+
+template <template<typename> class Concept, typename... Pixels>
+void test_concept()
+{
+    mp11::mp_for_each<Pixels...>(assert_concept<Concept>());
+}
+
+int main()
+{
+    test_concept<gil::PixelConcept, gil::test::fixture::pixel_typedefs>();
+    test_concept<gil::MutablePixelConcept, gil::test::fixture::pixel_typedefs>();
+
+    using rgb565_pixel_t = gil::packed_pixel_type
+        <
+            std::uint16_t,
+            mp11::mp_list_c<unsigned, 5, 6, 5>,
+            gil::rgb_layout_t
+        >::type;
+    function_requires<gil::PixelConcept<rgb565_pixel_t>>();
+    function_requires<gil::PixelValueConcept<rgb565_pixel_t>>();
+
+    using bgr556_pixel_t = gil::packed_pixel_type
+        <
+            std::uint16_t,
+            mp11::mp_list_c<unsigned, 5, 6, 5>,
+            gil::bgr_layout_t>::type;
+    function_requires<gil::PixelConcept<bgr556_pixel_t>>();
+    function_requires<gil::PixelValueConcept<bgr556_pixel_t>>();
+
+    function_requires<gil::PixelsCompatibleConcept<rgb565_pixel_t, bgr556_pixel_t>>();
+
+    return 0;
+}
diff --git a/src/boost/libs/gil/test/core/pixel/is_pixel.cpp b/src/boost/libs/gil/test/core/pixel/is_pixel.cpp
new file mode 100644
index 000000000..b9f84975a
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/is_pixel.cpp
@@ -0,0 +1,77 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/bit_aligned_pixel_reference.hpp>
+#include <boost/gil/packed_pixel.hpp>
+#include <boost/gil/pixel.hpp>
+#include <boost/gil/rgb.hpp>
+#include <boost/gil/typedefs.hpp>
+#include <boost/gil/concepts/pixel.hpp>
+
+#include <boost/mp11.hpp>
+
+#include "test_fixture.hpp"
+
+namespace gil = boost::gil;
+using namespace boost::mp11;
+
+int main()
+{
+    static_assert(std::is_same
+        <
+            mp_all_of<gil::test::fixture::pixel_typedefs, gil::is_pixel>,
+            std::true_type
+        >::value,
+        "is_pixel does not yield true for all core pixel types");
+
+    static_assert(std::is_same
+        <
+            mp_all_of
+            <
+                mp_transform
+                <
+                    gil::test::fixture::nested_pixel_type,
+                    gil::test::fixture::representative_pixel_types
+                >,
+                gil::is_pixel
+            >,
+            std::true_type
+        >::value,
+        "is_pixel does not yield true for representative pixel types");
+
+    static_assert(std::is_same
+        <
+            mp_all_of<gil::test::fixture::non_pixels, gil::is_pixel>,
+            std::false_type
+        >::value,
+        "is_pixel yields true for non-pixel type");
+
+    static_assert(std::is_same
+        <
+            mp_none_of<gil::test::fixture::non_pixels, gil::is_pixel>,
+            std::true_type
+        >::value,
+        "is_pixel yields true for non-pixel type");
+
+    using bgr121_ref_t = gil::bit_aligned_pixel_reference
+        <
+            std::uint8_t, mp_list_c<int, 1, 2, 1>, gil::bgr_layout_t, true
+        >;
+    static_assert(gil::is_pixel<bgr121_ref_t>::value,
+        "is_pixel does not yield true for bit_aligned_pixel_reference");
+
+    using rgb121_ref_t = gil::bit_aligned_pixel_reference
+        <
+            std::uint8_t, mp_list_c<int, 1, 2, 1>, gil::rgb_layout_t, true
+        >;
+    static_assert(gil::is_pixel<bgr121_ref_t>::value,
+        "is_pixel does not yield true for bit_aligned_pixel_reference");
+
+    using rgb121_packed_pixel_t = rgb121_ref_t::value_type;
+    static_assert(gil::is_pixel<rgb121_packed_pixel_t>::value,
+        "is_pixel does not yield true for packed_pixel");
+}
diff --git a/src/boost/libs/gil/test/core/pixel/is_planar.cpp b/src/boost/libs/gil/test/core/pixel/is_planar.cpp
new file mode 100644
index 000000000..fde33d4bd
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/is_planar.cpp
@@ -0,0 +1,137 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/pixel.hpp>
+#include <boost/gil/planar_pixel_iterator.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/mp11.hpp>
+
+namespace gil = boost::gil;
+using namespace boost::mp11;
+
+int main()
+{
+    using non_planar_pixels = mp_list
+    <
+        gil::gray8_pixel_t,
+        gil::gray8c_pixel_t,
+        gil::gray8s_pixel_t,
+        gil::gray8sc_pixel_t,
+        gil::gray16_pixel_t,
+        gil::gray16c_pixel_t,
+        gil::gray16s_pixel_t,
+        gil::gray16sc_pixel_t,
+        gil::gray16_pixel_t,
+        gil::gray32_pixel_t,
+        gil::gray32c_pixel_t,
+        gil::gray32f_pixel_t,
+        gil::gray32fc_pixel_t,
+        gil::gray32s_pixel_t,
+        gil::gray32sc_pixel_t,
+        gil::bgr8_pixel_t,
+        gil::bgr8c_pixel_t,
+        gil::bgr8s_pixel_t,
+        gil::bgr8sc_pixel_t,
+        gil::bgr16_pixel_t,
+        gil::bgr16c_pixel_t,
+        gil::bgr16s_pixel_t,
+        gil::bgr16sc_pixel_t,
+        gil::bgr32_pixel_t,
+        gil::bgr32c_pixel_t,
+        gil::bgr32f_pixel_t,
+        gil::bgr32fc_pixel_t,
+        gil::bgr32s_pixel_t,
+        gil::bgr32sc_pixel_t,
+        gil::rgb8_pixel_t,
+        gil::rgb8c_pixel_t,
+        gil::rgb8s_pixel_t,
+        gil::rgb8sc_pixel_t,
+        gil::rgb16_pixel_t,
+        gil::rgb16c_pixel_t,
+        gil::rgb16s_pixel_t,
+        gil::rgb16sc_pixel_t,
+        gil::rgb32_pixel_t,
+        gil::rgb32c_pixel_t,
+        gil::rgb32f_pixel_t,
+        gil::rgb32fc_pixel_t,
+        gil::rgb32s_pixel_t,
+        gil::rgb32sc_pixel_t,
+        gil::abgr8_pixel_t,
+        gil::abgr8c_pixel_t,
+        gil::abgr8s_pixel_t,
+        gil::abgr8sc_pixel_t,
+        gil::abgr16_pixel_t,
+        gil::abgr16c_pixel_t,
+        gil::abgr16s_pixel_t,
+        gil::abgr16sc_pixel_t,
+        gil::abgr32_pixel_t,
+        gil::abgr32c_pixel_t,
+        gil::abgr32f_pixel_t,
+        gil::abgr32fc_pixel_t,
+        gil::abgr32s_pixel_t,
+        gil::abgr32sc_pixel_t,
+        gil::bgra8_pixel_t,
+        gil::bgra8c_pixel_t,
+        gil::bgra8s_pixel_t,
+        gil::bgra8sc_pixel_t,
+        gil::bgra16_pixel_t,
+        gil::bgra16c_pixel_t,
+        gil::bgra16s_pixel_t,
+        gil::bgra16sc_pixel_t,
+        gil::bgra32_pixel_t,
+        gil::bgra32c_pixel_t,
+        gil::bgra32f_pixel_t,
+        gil::bgra32fc_pixel_t,
+        gil::bgra32s_pixel_t,
+        gil::bgra32sc_pixel_t,
+        gil::cmyk8_pixel_t,
+        gil::cmyk8c_pixel_t,
+        gil::cmyk8s_pixel_t,
+        gil::cmyk8sc_pixel_t,
+        gil::cmyk16_pixel_t,
+        gil::cmyk16c_pixel_t,
+        gil::cmyk16s_pixel_t,
+        gil::cmyk16sc_pixel_t,
+        gil::cmyk32_pixel_t,
+        gil::cmyk32c_pixel_t,
+        gil::cmyk32f_pixel_t,
+        gil::cmyk32fc_pixel_t,
+        gil::cmyk32s_pixel_t,
+        gil::cmyk32sc_pixel_t,
+        gil::rgba8_pixel_t,
+        gil::rgba8c_pixel_t,
+        gil::rgba8s_pixel_t,
+        gil::rgba8sc_pixel_t,
+        gil::rgba16_pixel_t,
+        gil::rgba16c_pixel_t,
+        gil::rgba16s_pixel_t,
+        gil::rgba16sc_pixel_t,
+        gil::rgba32_pixel_t,
+        gil::rgba32c_pixel_t,
+        gil::rgba32f_pixel_t,
+        gil::rgba32fc_pixel_t,
+        gil::rgba32s_pixel_t,
+        gil::rgba32sc_pixel_t
+    >;
+
+    static_assert(
+        std::is_same
+        <
+            mp_all_of<non_planar_pixels, gil::is_planar>,
+            std::false_type
+        >::value,
+        "is_planar yields true for non-planar pixel type");
+
+    static_assert(
+        std::is_same
+        <
+            mp_none_of<non_planar_pixels, gil::is_planar>,
+            std::true_type
+        >::value,
+        "is_planar yields true for non-planar pixel type");
+}
diff --git a/src/boost/libs/gil/test/core/pixel/num_channels.cpp b/src/boost/libs/gil/test/core/pixel/num_channels.cpp
new file mode 100644
index 000000000..ba80a260e
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/num_channels.cpp
@@ -0,0 +1,154 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/pixel.hpp>
+#include <boost/gil/concepts/pixel.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/mp11.hpp>
+
+namespace gil = boost::gil;
+using namespace boost::mp11;
+
+template <std::size_t NumChannels>
+struct assert_num_channels
+{
+    template <typename Pixel>
+    void operator()(Pixel&&)
+    {
+        static_assert(
+            gil::num_channels<Pixel>::value == NumChannels,
+            "pixels does not have expected number of channels");
+
+        // TODO: Verify num_channels type with std::is_same
+        // e.g. is std::integral_constant<T, ...>
+    }
+};
+
+template <std::size_t NumChannels, typename... Pixels>
+void test()
+{
+    mp_for_each<Pixels...>(assert_num_channels<NumChannels>());
+}
+
+
+int main()
+{
+    using one = mp_list
+    <
+        gil::gray8_pixel_t,
+        gil::gray8c_pixel_t,
+        gil::gray8s_pixel_t,
+        gil::gray8sc_pixel_t,
+        gil::gray16_pixel_t,
+        gil::gray16c_pixel_t,
+        gil::gray16s_pixel_t,
+        gil::gray16sc_pixel_t,
+        gil::gray16_pixel_t,
+        gil::gray32_pixel_t,
+        gil::gray32c_pixel_t,
+        gil::gray32f_pixel_t,
+        gil::gray32fc_pixel_t,
+        gil::gray32s_pixel_t,
+        gil::gray32sc_pixel_t
+    >;
+    test<1, one>();
+
+    using three = mp_list
+    <
+        gil::bgr8_pixel_t,
+        gil::bgr8c_pixel_t,
+        gil::bgr8s_pixel_t,
+        gil::bgr8sc_pixel_t,
+        gil::bgr16_pixel_t,
+        gil::bgr16c_pixel_t,
+        gil::bgr16s_pixel_t,
+        gil::bgr16sc_pixel_t,
+        gil::bgr32_pixel_t,
+        gil::bgr32c_pixel_t,
+        gil::bgr32f_pixel_t,
+        gil::bgr32fc_pixel_t,
+        gil::bgr32s_pixel_t,
+        gil::bgr32sc_pixel_t,
+        gil::rgb8_pixel_t,
+        gil::rgb8c_pixel_t,
+        gil::rgb8s_pixel_t,
+        gil::rgb8sc_pixel_t,
+        gil::rgb16_pixel_t,
+        gil::rgb16c_pixel_t,
+        gil::rgb16s_pixel_t,
+        gil::rgb16sc_pixel_t,
+        gil::rgb32_pixel_t,
+        gil::rgb32c_pixel_t,
+        gil::rgb32f_pixel_t,
+        gil::rgb32fc_pixel_t,
+        gil::rgb32s_pixel_t,
+        gil::rgb32sc_pixel_t
+    >;
+    test<3, three>();
+
+    using four = mp_list
+    <
+        gil::abgr8_pixel_t,
+        gil::abgr8c_pixel_t,
+        gil::abgr8s_pixel_t,
+        gil::abgr8sc_pixel_t,
+        gil::abgr16_pixel_t,
+        gil::abgr16c_pixel_t,
+        gil::abgr16s_pixel_t,
+        gil::abgr16sc_pixel_t,
+        gil::abgr32_pixel_t,
+        gil::abgr32c_pixel_t,
+        gil::abgr32f_pixel_t,
+        gil::abgr32fc_pixel_t,
+        gil::abgr32s_pixel_t,
+        gil::abgr32sc_pixel_t,
+        gil::bgra8_pixel_t,
+        gil::bgra8c_pixel_t,
+        gil::bgra8s_pixel_t,
+        gil::bgra8sc_pixel_t,
+        gil::bgra16_pixel_t,
+        gil::bgra16c_pixel_t,
+        gil::bgra16s_pixel_t,
+        gil::bgra16sc_pixel_t,
+        gil::bgra32_pixel_t,
+        gil::bgra32c_pixel_t,
+        gil::bgra32f_pixel_t,
+        gil::bgra32fc_pixel_t,
+        gil::bgra32s_pixel_t,
+        gil::bgra32sc_pixel_t,
+        gil::cmyk8_pixel_t,
+        gil::cmyk8c_pixel_t,
+        gil::cmyk8s_pixel_t,
+        gil::cmyk8sc_pixel_t,
+        gil::cmyk16_pixel_t,
+        gil::cmyk16c_pixel_t,
+        gil::cmyk16s_pixel_t,
+        gil::cmyk16sc_pixel_t,
+        gil::cmyk32_pixel_t,
+        gil::cmyk32c_pixel_t,
+        gil::cmyk32f_pixel_t,
+        gil::cmyk32fc_pixel_t,
+        gil::cmyk32s_pixel_t,
+        gil::cmyk32sc_pixel_t,
+        gil::rgba8_pixel_t,
+        gil::rgba8c_pixel_t,
+        gil::rgba8s_pixel_t,
+        gil::rgba8sc_pixel_t,
+        gil::rgba16_pixel_t,
+        gil::rgba16c_pixel_t,
+        gil::rgba16s_pixel_t,
+        gil::rgba16sc_pixel_t,
+        gil::rgba32_pixel_t,
+        gil::rgba32c_pixel_t,
+        gil::rgba32f_pixel_t,
+        gil::rgba32fc_pixel_t,
+        gil::rgba32s_pixel_t,
+        gil::rgba32sc_pixel_t
+    >;
+    test<4, four>();
+}
diff --git a/src/boost/libs/gil/test/core/pixel/packed_pixel.cpp b/src/boost/libs/gil/test/core/pixel/packed_pixel.cpp
new file mode 100644
index 000000000..d73584c34
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/packed_pixel.cpp
@@ -0,0 +1,336 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/channel.hpp>
+#include <boost/gil/gray.hpp>
+#include <boost/gil/packed_pixel.hpp>
+#include <boost/gil/rgb.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/core/typeinfo.hpp>
+
+#include "test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+namespace mp11 = boost::mp11;
+
+void test_packed_pixel_gray3_definition()
+{
+    // Verify packed_pixel members
+
+    static_assert(std::is_same<fixture::packed_pixel_gray3::layout_t, gil::gray_layout_t>::value,
+        "layout should be bgr");
+
+    static_assert(std::is_same<fixture::packed_pixel_gray3::value_type, fixture::packed_pixel_gray3>::value,
+        "value_type member should be of the same type as the packed_pixel specialization");
+
+    static_assert(std::is_reference<fixture::packed_pixel_gray3::reference>::value,
+        "reference member should be a reference");
+
+    static_assert(std::is_reference<fixture::packed_pixel_gray3::const_reference>::value,
+        "const_reference member should be a reference");
+
+    static_assert(std::is_same<decltype(fixture::packed_pixel_gray3::is_mutable), bool const>::value &&
+        fixture::packed_pixel_gray3::is_mutable,
+        "is_mutable should be boolean");
+
+    // Verify metafunctions
+
+    static_assert(mp11::mp_size<fixture::packed_channel_references_3>::value == 1,
+        "packed_channel_references_vector_type should define one reference to channel start bits");
+
+    using channel1_ref_t = mp11::mp_at_c<fixture::packed_channel_references_3, 0>;
+    static_assert(channel1_ref_t::num_bits == 3,
+        "1st channel of gray3 pixel should be of 3-bit size");
+
+    static_assert(std::is_same
+        <
+            channel1_ref_t,
+            gil::packed_channel_reference<std::uint8_t, 0, 3, true> const
+        >::value,
+        "1st element of packed_channel_references_vector should be packed_channel_reference of 1st channel");
+
+    // double check intermediate metafunction packed_channel_reference_type
+    static_assert(std::is_same
+        <
+            gil::detail::packed_channel_reference_type
+            <
+                std::uint8_t,
+                std::integral_constant<int, 0>,
+                std::integral_constant<int, 3>
+            >::type,
+            channel1_ref_t
+        >::value,
+        "packed_channel_reference_type should return packed_channel_reference");
+    static_assert(std::is_same
+        <
+            gil::detail::packed_channel_reference_type
+            <
+                std::uint8_t,
+                std::integral_constant<int, 0>,
+                std::integral_constant<int, 3>
+            >::type,
+            gil::packed_channel_reference<std::uint8_t, 0, 3, true> const
+        >::value,
+        "packed_channel_reference_type should return packed_channel_reference");
+}
+
+void test_packed_pixel_gray3_assignment()
+{
+    fixture::packed_pixel_gray3 p1{int{5}};
+    fixture::packed_pixel_gray3 p2;
+    p2 = p1;
+    BOOST_TEST_EQ(p1._bitfield, p2._bitfield);
+}
+
+void test_packed_pixel_gray3_equality()
+{
+    fixture::packed_pixel_gray3 p1{int{5}};
+    fixture::packed_pixel_gray3 p2{int{5}};
+    BOOST_TEST_EQ(p1, p2);
+
+    fixture::packed_pixel_gray3 p3{int{3}};
+    BOOST_TEST_NE(p2, p3);
+}
+
+void test_packed_pixel_gray3_assignment_gray_channel()
+{
+    {
+        fixture::packed_pixel_gray3 p1; // default-initialized
+        p1 = int{5};
+        BOOST_TEST_EQ(p1._bitfield, int{5});
+    }
+
+    {
+        fixture::packed_pixel_gray3 p1{0}; // value-initialized
+        p1 = int{5};
+        BOOST_TEST_EQ(p1._bitfield, int{5});
+    }
+}
+
+void test_packed_pixel_gray3_equality_gray_channel()
+{
+    fixture::packed_pixel_gray3 p1{int{3}};
+    BOOST_TEST_EQ(p1, int{3});
+}
+
+void test_packed_pixel_bgr121_definition()
+{
+    // Verify packed_pixel members
+
+    static_assert(std::is_same<fixture::packed_pixel_bgr121::layout_t, gil::bgr_layout_t>::value,
+        "layout should be bgr");
+
+    static_assert(std::is_same<fixture::packed_pixel_bgr121::value_type, fixture::packed_pixel_bgr121>::value,
+        "value_type member should be of the same type as the packed_pixel specialization");
+
+    static_assert(std::is_reference<fixture::packed_pixel_bgr121::reference>::value,
+        "reference member should be a reference");
+
+    static_assert(std::is_reference<fixture::packed_pixel_bgr121::const_reference>::value,
+        "const_reference member should be a reference");
+
+    static_assert(std::is_same<decltype(fixture::packed_pixel_bgr121::is_mutable), bool const>::value &&
+        fixture::packed_pixel_bgr121::is_mutable,
+        "is_mutable should be boolean");
+
+    // Verify metafunctions
+
+    static_assert(mp11::mp_size<fixture::packed_channel_references_121>::value == 3,
+        "packed_channel_references_vector_type should define three references to channel start bits");
+
+    using channel1_ref_t = mp11::mp_at_c<fixture::packed_channel_references_121, 0>;
+    static_assert(channel1_ref_t::num_bits == 1,
+        "1st channel of bgr121 pixel should be of 1-bit size");
+
+    using channel2_ref_t = mp11::mp_at_c<fixture::packed_channel_references_121, 1>;
+    static_assert(channel2_ref_t::num_bits == 2,
+        "2nd channel of bgr121 pixel should be of 2-bit size");
+
+    using channel3_ref_t = mp11::mp_at_c<fixture::packed_channel_references_121, 2>;
+    static_assert(channel3_ref_t::num_bits == 1,
+        "3rd channel of bgr121 pixel should be of 1-bit size");
+
+    static_assert(std::is_same
+        <
+            channel1_ref_t,
+            gil::packed_channel_reference<std::uint8_t, 0, 1, true> const
+        >::value,
+        "1st element of packed_channel_references_vector should be packed_channel_reference of 1st channel");
+
+    static_assert(std::is_same
+        <
+            channel2_ref_t,
+            gil::packed_channel_reference<std::uint8_t, 1, 2, true> const
+        >::value,
+        "2nd element of packed_channel_references_vector should be packed_channel_reference of 2nd channel");
+
+    static_assert(std::is_same
+        <
+            channel3_ref_t,
+            gil::packed_channel_reference<std::uint8_t, 3, 1, true> const
+        >::value,
+        "3rd element of packed_channel_references_vector should be packed_channel_reference of 3rd channel");
+
+    // double check intermediate metafunction packed_channel_reference_type
+    static_assert(std::is_same
+        <
+            gil::detail::packed_channel_reference_type
+            <
+                std::uint8_t, mp11::mp_int<0>, mp11::mp_int<1>
+            >::type,
+            channel1_ref_t
+        >::value,
+        "packed_channel_reference_type should return packed_channel_reference");
+    static_assert(std::is_same
+        <
+            gil::detail::packed_channel_reference_type
+            <
+                std::uint8_t, mp11::mp_int<0>, mp11::mp_int<1>
+            >::type,
+            gil::packed_channel_reference<std::uint8_t, 0, 1, true> const
+        >::value,
+        "packed_channel_reference_type should return packed_channel_reference");
+}
+
+void test_packed_pixel_bgr121_assignment()
+{
+    fixture::packed_pixel_bgr121 p1{0, 3, 1};
+    fixture::packed_pixel_bgr121 p2;
+    p2 = p1;
+    BOOST_TEST_EQ(p1._bitfield, p2._bitfield);
+}
+
+void test_packed_pixel_bgr121_equality()
+{
+    fixture::packed_pixel_bgr121 p1{1, 3, 0};
+    fixture::packed_pixel_bgr121 p2{1, 3, 0};
+    BOOST_TEST_EQ(p1, p2);
+
+    fixture::packed_pixel_bgr121 p3{0, 3, 1};
+    BOOST_TEST_NE(p2, p3);
+}
+
+void test_packed_pixel_rgb535_definition()
+{
+    // Verify packed_pixel members
+
+    static_assert(std::is_same<fixture::packed_pixel_rgb535::layout_t, gil::rgb_layout_t>::value,
+        "layout should be bgr");
+
+    static_assert(std::is_same<fixture::packed_pixel_rgb535::value_type, fixture::packed_pixel_rgb535>::value,
+        "value_type member should be of the same type as the packed_pixel specialization");
+
+    static_assert(std::is_reference<fixture::packed_pixel_rgb535::reference>::value,
+        "reference member should be a reference");
+
+    static_assert(std::is_reference<fixture::packed_pixel_rgb535::const_reference>::value,
+        "const_reference member should be a reference");
+
+    static_assert(std::is_same<decltype(fixture::packed_pixel_rgb535::is_mutable), bool const>::value &&
+        fixture::packed_pixel_rgb535::is_mutable,
+        "is_mutable should be boolean");
+
+    // Verify metafunctions
+
+    static_assert(mp11::mp_size<fixture::packed_channel_references_535>::value == 3,
+        "packed_channel_references_vector_type should define three references to channel start bits");
+
+    using channel1_ref_t = mp11::mp_at_c<fixture::packed_channel_references_535, 0>;
+    static_assert(channel1_ref_t::num_bits == 5,
+        "1st channel of rgb535 pixel should be of 5-bit size");
+
+    using channel2_ref_t = mp11::mp_at_c<fixture::packed_channel_references_535, 1>;
+    static_assert(channel2_ref_t::num_bits == 3,
+        "2nd channel of rgb535 pixel should be of 3-bit size");
+
+    using channel3_ref_t = mp11::mp_at_c<fixture::packed_channel_references_535, 2>;
+    static_assert(channel3_ref_t::num_bits == 5,
+        "3rd channel of rgb535 pixel should be of 5-bit size");
+
+    static_assert(std::is_same
+        <
+            channel1_ref_t,
+            gil::packed_channel_reference<std::uint16_t, 0, 5, true> const
+        >::value,
+        "1st element of packed_channel_references_vector should be packed_channel_reference of 1st channel");
+
+    static_assert(std::is_same
+        <
+            channel2_ref_t,
+            gil::packed_channel_reference<std::uint16_t, 5, 3, true> const
+        >::value,
+        "2nd element of packed_channel_references_vector should be packed_channel_reference of 2nd channel");
+
+    static_assert(std::is_same
+        <
+            channel3_ref_t,
+            gil::packed_channel_reference<std::uint16_t, 8, 5, true> const
+        >::value,
+        "3rd element of packed_channel_references_vector should be packed_channel_reference of 3rd channel");
+
+    // double check intermediate metafunction packed_channel_reference_type
+    static_assert(std::is_same
+        <
+            gil::detail::packed_channel_reference_type
+            <
+                std::uint16_t,
+                std::integral_constant<int, 0>,
+                std::integral_constant<int, 5>
+            >::type,
+            channel1_ref_t
+        >::value,
+        "packed_channel_reference_type should return packed_channel_reference");
+    static_assert(std::is_same
+        <
+            gil::detail::packed_channel_reference_type
+            <
+                std::uint16_t,
+                std::integral_constant<int, 0>,
+                std::integral_constant<int, 5>
+            >::type,
+            gil::packed_channel_reference<std::uint16_t, 0, 5, true> const
+        >::value,
+        "packed_channel_reference_type should return packed_channel_reference");
+}
+
+void test_packed_pixel_rgb535_assignment()
+{
+    fixture::packed_pixel_rgb535 p1{31, 7, 31};
+    fixture::packed_pixel_rgb535 p2;
+    p2 = p1;
+    BOOST_TEST_EQ(p1._bitfield, p2._bitfield);
+}
+
+void test_packed_pixel_rgb535_equality()
+{
+    fixture::packed_pixel_rgb535 p1{7, 3, 7};
+    fixture::packed_pixel_rgb535 p2{7, 3, 7};
+    BOOST_TEST_EQ(p1, p2);
+
+    fixture::packed_pixel_rgb535 p3{7, 7, 7};
+    BOOST_TEST_NE(p2, p3);
+}
+
+int main()
+{
+    test_packed_pixel_gray3_definition();
+    test_packed_pixel_gray3_assignment();
+    test_packed_pixel_gray3_equality();
+    test_packed_pixel_gray3_assignment_gray_channel();
+    test_packed_pixel_gray3_equality_gray_channel();
+    test_packed_pixel_bgr121_definition();
+    test_packed_pixel_bgr121_assignment();
+    test_packed_pixel_bgr121_equality();
+    test_packed_pixel_rgb535_definition();
+    test_packed_pixel_rgb535_assignment();
+    test_packed_pixel_rgb535_equality();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/pixel/pixel_reference_is_mutable.cpp b/src/boost/libs/gil/test/core/pixel/pixel_reference_is_mutable.cpp
new file mode 100644
index 000000000..a9f1475cf
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/pixel_reference_is_mutable.cpp
@@ -0,0 +1,35 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/mp11.hpp>
+
+#include "test_fixture.hpp"
+
+namespace gil = boost::gil;
+using namespace boost::mp11;
+
+int main()
+{
+    static_assert(mp_all_of
+        <
+            gil::test::fixture::pixel_typedefs,
+            gil::pixel_reference_is_mutable
+        >::value,
+        "pixel_reference_is_mutable should yield true for all core pixel typedefs");
+
+    static_assert(!mp_all_of
+        <
+            mp_transform
+            <
+                gil::test::fixture::nested_type,
+                gil::test::fixture::representative_pixel_types
+            >,
+            gil::pixel_reference_is_mutable
+        >::value,
+        "pixel_reference_is_mutable should yield true for some representative core pixel types");
+}
diff --git a/src/boost/libs/gil/test/core/pixel/pixels_are_compatible.cpp b/src/boost/libs/gil/test/core/pixel/pixels_are_compatible.cpp
new file mode 100644
index 000000000..f4ce4d84d
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/pixels_are_compatible.cpp
@@ -0,0 +1,132 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/pixel.hpp>
+#include <boost/gil/concepts/pixel.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <boost/mp11.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+using namespace boost::mp11;
+
+template <typename Pixel>
+struct assert_compatible
+{
+    template <typename CompatiblePixel>
+    void operator()(CompatiblePixel&&)
+    {
+        using result_t = typename gil::pixels_are_compatible<Pixel, CompatiblePixel>::type;
+        static_assert(result_t::value, "pixels should be compatible");
+
+        // TODO: Refine after MPL -> MP11 switch
+        static_assert(
+            std::is_same<result_t, std::true_type>::value,
+            "pixels_are_compatible result type should be std::true_type");
+
+        static_assert(
+            !std::is_same<result_t, std::false_type>::value,
+            "pixels_are_compatible result type should no be std::false_type");
+    }
+};
+
+template <typename Pixel>
+struct assert_not_compatible
+{
+    template <typename NotCompatiblePixel>
+    void operator()(NotCompatiblePixel&&)
+    {
+        static_assert(
+            !gil::pixels_are_compatible<Pixel, NotCompatiblePixel>::value,
+            "pixels should not be compatible");
+    }
+};
+
+template <typename Pixel, typename... CompatiblePixels>
+void test_compatible()
+{
+    mp_for_each<CompatiblePixels...>(assert_compatible<Pixel>());
+}
+
+template <typename Pixel, typename... CompatiblePixels>
+void test_not_compatible()
+{
+    mp_for_each<CompatiblePixels...>(assert_not_compatible<Pixel>());
+}
+
+int main()
+{
+    test_compatible<gil::gray8_pixel_t, mp_list<
+        gil::gray8_pixel_t,
+        gil::gray8c_pixel_t>>();
+    test_compatible<gil::gray8s_pixel_t, mp_list<
+        gil::gray8s_pixel_t,
+        gil::gray8sc_pixel_t>>();
+    test_not_compatible<gil::gray8_pixel_t, mp_list<
+        gil::gray8s_pixel_t,
+        gil::gray8sc_pixel_t>>();
+
+    test_compatible<gil::gray16_pixel_t, mp_list<
+        gil::gray16_pixel_t,
+        gil::gray16c_pixel_t>>();
+    test_compatible<gil::gray16s_pixel_t, mp_list<
+        gil::gray16s_pixel_t,
+        gil::gray16sc_pixel_t>>();
+    test_not_compatible<gil::gray16_pixel_t, mp_list<
+        gil::gray16s_pixel_t,
+        gil::gray16sc_pixel_t>>();
+
+    test_compatible<gil::rgb8_pixel_t, mp_list<
+        gil::bgr8_pixel_t,
+        gil::bgr8c_pixel_t,
+        gil::rgb8_pixel_t,
+        gil::rgb8c_pixel_t>>();
+    test_compatible<gil::rgb8s_pixel_t, mp_list<
+        gil::bgr8s_pixel_t,
+        gil::bgr8sc_pixel_t,
+        gil::rgb8s_pixel_t,
+        gil::rgb8sc_pixel_t>>();
+    test_not_compatible<gil::rgb8_pixel_t, mp_list<
+        gil::argb8_pixel_t,
+        gil::abgr8_pixel_t,
+        gil::rgba8_pixel_t,
+        gil::bgr8s_pixel_t,
+        gil::bgr8sc_pixel_t,
+        gil::rgb8s_pixel_t,
+        gil::rgb8sc_pixel_t>>();
+
+    test_compatible<gil::rgba8_pixel_t, mp_list<
+        gil::abgr8_pixel_t,
+        gil::argb8_pixel_t,
+        gil::bgra8_pixel_t,
+        gil::bgra8c_pixel_t,
+        gil::rgba8_pixel_t,
+        gil::rgba8c_pixel_t>>();
+    test_not_compatible<gil::rgba8_pixel_t, mp_list<
+        gil::rgb8_pixel_t,
+        gil::rgb16_pixel_t,
+        gil::rgba16_pixel_t,
+        gil::cmyk8_pixel_t,
+        gil::cmyk16_pixel_t>>();
+
+    test_compatible<gil::cmyk8_pixel_t, mp_list<
+        gil::cmyk8_pixel_t,
+        gil::cmyk8c_pixel_t>>();
+    test_compatible<gil::cmyk8s_pixel_t, mp_list<
+        gil::cmyk8s_pixel_t,
+        gil::cmyk8sc_pixel_t>>();
+    test_not_compatible<gil::cmyk8_pixel_t, mp_list<
+        gil::cmyk8s_pixel_t,
+        gil::cmyk8sc_pixel_t>>();
+
+    test_compatible<gil::cmyk32f_pixel_t, mp_list<
+        gil::cmyk32f_pixel_t,
+        gil::cmyk32fc_pixel_t>>();
+
+}
diff --git a/src/boost/libs/gil/test/core/pixel/test_fixture.cpp b/src/boost/libs/gil/test/core/pixel/test_fixture.cpp
new file mode 100644
index 000000000..1d6e5d470
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/test_fixture.cpp
@@ -0,0 +1,113 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#if defined(BOOST_CLANG)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wconversion"
+#pragma clang diagnostic ignored "-Wfloat-equal"
+#pragma clang diagnostic ignored "-Wsign-conversion"
+#elif BOOST_GCC >= 40700
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wconversion"
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+#pragma GCC diagnostic ignored "-Wsign-conversion"
+#endif
+
+#include <boost/gil/channel.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <limits>
+#include <ostream>
+
+#include "test_fixture.hpp"
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+struct test_pixel_value_default_constructor
+{
+    template <typename Pixel>
+    void operator()(Pixel const &)
+    {
+        using pixel_t = Pixel;
+        fixture::pixel_value<pixel_t> fix;
+        pixel_t const default_value{};
+        BOOST_TEST_EQ(fix.pixel_, default_value);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_types>(test_pixel_value_default_constructor{});
+    }
+};
+
+struct test_pixel_value_parameterized_constructor
+{
+    template <typename Pixel>
+    void operator()(Pixel const &)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        // Sample channel value, simplified, could be min, max, random
+        channel_t const sample_channel = 2;
+        pixel_t sample_pixel;
+        gil::static_fill(sample_pixel, sample_channel);
+        fixture::pixel_value<pixel_t> fix{sample_pixel};
+        BOOST_TEST_EQ(fix.pixel_, sample_pixel);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_types>(test_pixel_value_parameterized_constructor{});
+    }
+};
+
+struct test_pixel_reference_default_constructor
+{
+        template <typename Pixel>
+    void operator()(Pixel const &)
+    {
+        using pixel_t = Pixel;
+        fixture::pixel_reference<pixel_t&> fix;
+        pixel_t pix_default{};
+        BOOST_TEST_EQ(fix.pixel_, pix_default);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_types>(test_pixel_reference_default_constructor{});
+    }
+};
+
+struct test_pixel_reference_parameterized_constructor
+{
+    template <typename Pixel>
+    void operator()(Pixel const &)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        // Sample channel value, simplified, could be min, max, random
+        channel_t const sample_channel = 3;
+        pixel_t sample_pixel;
+        gil::static_fill(sample_pixel, sample_channel);
+        fixture::pixel_reference<pixel_t&> fix{sample_pixel};
+        BOOST_TEST_EQ(fix.pixel_, sample_pixel);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_types>(test_pixel_reference_parameterized_constructor{});
+    }
+};
+
+int main()
+{
+    test_pixel_value_default_constructor::run();
+    test_pixel_value_parameterized_constructor::run();
+    test_pixel_reference_default_constructor::run();
+    test_pixel_reference_parameterized_constructor::run();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/pixel/test_fixture.hpp b/src/boost/libs/gil/test/core/pixel/test_fixture.hpp
new file mode 100644
index 000000000..bf4e1ed8d
--- /dev/null
+++ b/src/boost/libs/gil/test/core/pixel/test_fixture.hpp
@@ -0,0 +1,346 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+// Copyright 2005-2007 Adobe Systems Incorporated
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_TEST_CORE_PIXEL_TEST_FIXTURE_HPP
+#define BOOST_GIL_TEST_CORE_PIXEL_TEST_FIXTURE_HPP
+
+#include <boost/gil/channel.hpp>
+#include <boost/gil/color_base_algorithm.hpp>
+#include <boost/gil/concepts/pixel.hpp>
+#include <boost/gil/packed_pixel.hpp>
+#include <boost/gil/pixel.hpp>
+#include <boost/gil/planar_pixel_reference.hpp>
+#include <boost/gil/promote_integral.hpp>
+#include <boost/gil/typedefs.hpp>
+#include <boost/gil/extension/toolbox/metafunctions/channel_type.hpp> // channel_type for packed and bit-aligned pixels
+
+#include <boost/core/ignore_unused.hpp>
+#include <boost/mp11.hpp>
+#include <boost/mp11/mpl.hpp> // for compatibility with Boost.Test
+
+#include <cstdint>
+#include <iterator>
+#include <tuple>
+#include <type_traits>
+
+#include "core/test_fixture.hpp" // random_value
+#include "core/channel/test_fixture.hpp" // channel_minmax_value
+
+namespace boost { namespace gil { namespace test { namespace fixture {
+
+template <typename Pixel>
+struct pixel_generator
+{
+    using channel_t = typename gil::channel_type<Pixel>::type;
+
+    static auto max() -> Pixel
+    {
+        channel_minmax_value<channel_t> channel;
+        Pixel pixel;
+        gil::static_fill(pixel, channel.max_v_);
+        return pixel;
+    }
+
+    static auto min()-> Pixel
+    {
+        channel_minmax_value<channel_t> channel;
+        Pixel pixel;
+        gil::static_fill(pixel, channel.min_v_);
+        return pixel;
+    }
+
+    static auto random() -> Pixel
+    {
+        random_value<channel_t> generate;
+        Pixel pixel;
+        gil::static_generate(pixel, [&generate]() { return generate(); });
+        return pixel;
+    }
+};
+
+template <typename Pixel, int Tag = 0>
+class pixel_value
+{
+public:
+    using type = Pixel;
+    using pixel_t = type;
+    type pixel_{};
+
+    pixel_value() = default;
+    explicit pixel_value(pixel_t const& pixel)
+        : pixel_(pixel) // test copy constructor
+    {
+        type temp_pixel; // test default constructor
+        boost::ignore_unused(temp_pixel);
+        boost::function_requires<PixelValueConcept<pixel_t> >();
+    }
+};
+
+// Alias compatible with naming of equivalent class in the test/legacy/pixel.cpp
+// The core suffix indicates `Pixel` is GIL core pixel type.
+template <typename Pixel, int Tag = 0>
+using value_core = pixel_value<Pixel, Tag>;
+
+template <typename PixelRef, int Tag = 0>
+struct pixel_reference
+    : pixel_value
+    <
+        typename std::remove_reference<PixelRef>::type,
+        Tag
+    >
+{
+    static_assert(
+        std::is_reference<PixelRef>::value ||
+        gil::is_planar<PixelRef>::value, // poor-man test for specialization of planar_pixel_reference
+        "PixelRef must be reference or gil::planar_pixel_reference");
+
+    using type = PixelRef;
+    using pixel_t = typename std::remove_reference<PixelRef>::type;
+    using parent_t = pixel_value<typename pixel_t::value_type, Tag>;
+    using value_t = typename pixel_t::value_type;
+    type pixel_; // reference
+
+    pixel_reference() : parent_t{}, pixel_(parent_t::pixel_) {}
+    explicit pixel_reference(value_t const& pixel) : parent_t(pixel), pixel_(parent_t::pixel_)
+    {
+        boost::function_requires<PixelConcept<pixel_t>>();
+    }
+};
+
+// Alias compatible with naming of equivalent class in the test/legacy/pixel.cpp
+// The core suffix indicates `Pixel` is GIL core pixel type.
+template <typename Pixel, int Tag = 0>
+using reference_core = pixel_reference<Pixel, Tag>;
+
+// Metafunction to yield nested type of a representative pixel type
+template <typename PixelValueOrReference>
+using nested_type = typename PixelValueOrReference::type;
+
+// Metafunction to yield nested type of a representative pixel_t type
+template <typename PixelValueOrReference>
+using nested_pixel_type = typename PixelValueOrReference::pixel_t;
+
+// Subset of pixel models that covers all color spaces, channel depths,
+// reference/value, planar/interleaved, const/mutable.
+// Operations like color conversion will be invoked on pairs of those.
+using representative_pixel_types= ::boost::mp11::mp_list
+<
+    value_core<gil::gray8_pixel_t>,
+    reference_core<gil::gray16_pixel_t&>,
+    value_core<gil::bgr8_pixel_t>,
+    reference_core<gil::rgb8_planar_ref_t>,
+    value_core<gil::argb32_pixel_t>,
+    reference_core<gil::cmyk32f_pixel_t&>,
+    reference_core<gil::abgr16c_ref_t>, // immutable reference
+    reference_core<gil::rgb32fc_planar_ref_t>
+>;
+
+// List of all integer-based core pixel typedefs (i.e. with cv-qualifiers)
+using pixel_integer_types = ::boost::mp11::mp_list
+<
+    gil::gray8_pixel_t,
+    gil::gray8s_pixel_t,
+    gil::gray16_pixel_t,
+    gil::gray16s_pixel_t,
+    gil::gray32_pixel_t,
+    gil::gray32s_pixel_t,
+    gil::bgr8_pixel_t,
+    gil::bgr8s_pixel_t,
+    gil::bgr16_pixel_t,
+    gil::bgr16s_pixel_t,
+    gil::bgr32_pixel_t,
+    gil::bgr32s_pixel_t,
+    gil::rgb8_pixel_t,
+    gil::rgb8s_pixel_t,
+    gil::rgb16_pixel_t,
+    gil::rgb16s_pixel_t,
+    gil::rgb32_pixel_t,
+    gil::rgb32s_pixel_t,
+    gil::abgr8_pixel_t,
+    gil::abgr8s_pixel_t,
+    gil::abgr16_pixel_t,
+    gil::abgr16s_pixel_t,
+    gil::abgr32_pixel_t,
+    gil::abgr32s_pixel_t,
+    gil::bgra8_pixel_t,
+    gil::bgra8s_pixel_t,
+    gil::bgra16_pixel_t,
+    gil::bgra16s_pixel_t,
+    gil::bgra32_pixel_t,
+    gil::bgra32s_pixel_t,
+    gil::cmyk8_pixel_t,
+    gil::cmyk8s_pixel_t,
+    gil::cmyk16_pixel_t,
+    gil::cmyk16s_pixel_t,
+    gil::cmyk32_pixel_t,
+    gil::cmyk32s_pixel_t,
+    gil::rgba8_pixel_t,
+    gil::rgba8s_pixel_t,
+    gil::rgba16_pixel_t,
+    gil::rgba16s_pixel_t,
+    gil::rgba32_pixel_t,
+    gil::rgba32s_pixel_t
+>;
+
+// List of all integer-based core pixel typedefs (i.e. with cv-qualifiers)
+using pixel_float_types = ::boost::mp11::mp_list
+<
+    gil::gray32f_pixel_t,
+    gil::bgr32f_pixel_t,
+    gil::rgb32f_pixel_t,
+    gil::abgr32f_pixel_t,
+    gil::bgra32f_pixel_t,
+    gil::cmyk32f_pixel_t,
+    gil::rgba32f_pixel_t
+>;
+
+// List of all core pixel types (i.e. without cv-qualifiers)
+using pixel_types = ::boost::mp11::mp_append
+<
+    pixel_integer_types,
+    pixel_float_types
+>;
+
+// List of all core pixel typedefs (i.e. with cv-qualifiers)
+using pixel_typedefs = ::boost::mp11::mp_append
+<
+    pixel_integer_types,
+    pixel_float_types,
+    ::boost::mp11::mp_list
+    <
+        gil::gray8c_pixel_t,
+        gil::gray8sc_pixel_t,
+        gil::gray16c_pixel_t,
+        gil::gray16sc_pixel_t,
+        gil::gray32c_pixel_t,
+        gil::gray32fc_pixel_t,
+        gil::gray32sc_pixel_t,
+        gil::bgr8c_pixel_t,
+        gil::bgr8sc_pixel_t,
+        gil::bgr16c_pixel_t,
+        gil::bgr16sc_pixel_t,
+        gil::bgr32c_pixel_t,
+        gil::bgr32fc_pixel_t,
+        gil::bgr32sc_pixel_t,
+        gil::rgb8c_pixel_t,
+        gil::rgb8sc_pixel_t,
+        gil::rgb16c_pixel_t,
+        gil::rgb16sc_pixel_t,
+        gil::rgb32c_pixel_t,
+        gil::rgb32fc_pixel_t,
+        gil::rgb32sc_pixel_t,
+        gil::abgr8c_pixel_t,
+        gil::abgr8sc_pixel_t,
+        gil::abgr16c_pixel_t,
+        gil::abgr16sc_pixel_t,
+        gil::abgr32c_pixel_t,
+        gil::abgr32fc_pixel_t,
+        gil::abgr32sc_pixel_t,
+        gil::bgra8c_pixel_t,
+        gil::bgra8sc_pixel_t,
+        gil::bgra16c_pixel_t,
+        gil::bgra16sc_pixel_t,
+        gil::bgra32c_pixel_t,
+        gil::bgra32fc_pixel_t,
+        gil::bgra32sc_pixel_t,
+        gil::cmyk8c_pixel_t,
+        gil::cmyk8sc_pixel_t,
+        gil::cmyk16c_pixel_t,
+        gil::cmyk16sc_pixel_t,
+        gil::cmyk32c_pixel_t,
+        gil::cmyk32fc_pixel_t,
+        gil::cmyk32sc_pixel_t,
+        gil::rgba8c_pixel_t,
+        gil::rgba8sc_pixel_t,
+        gil::rgba16c_pixel_t,
+        gil::rgba16sc_pixel_t,
+        gil::rgba32c_pixel_t,
+        gil::rgba32fc_pixel_t,
+        gil::rgba32sc_pixel_t
+    >
+>;
+
+struct not_a_pixel_type {};
+
+using non_pixels = ::boost::mp11::mp_list
+<
+    not_a_pixel_type,
+    char,
+    short, int, long,
+    double, float,
+    std::size_t,
+    std::true_type,
+    std::false_type
+>;
+
+using packed_channel_references_3 = typename gil::detail::packed_channel_references_vector_type
+<
+    std::uint8_t,
+    mp11::mp_list_c<int, 3>
+>::type;
+
+using packed_pixel_gray3 = gil::packed_pixel
+<
+    std::uint8_t,
+    packed_channel_references_3,
+    gil::gray_layout_t
+>;
+
+using packed_channel_references_121 = typename gil::detail::packed_channel_references_vector_type
+<
+    std::uint8_t,
+    mp11::mp_list_c<int, 1, 2, 1>
+>::type;
+
+using packed_pixel_bgr121 = gil::packed_pixel
+<
+    std::uint8_t,
+    packed_channel_references_121,
+    gil::bgr_layout_t
+>;
+
+using packed_channel_references_535 = typename gil::detail::packed_channel_references_vector_type
+<
+    std::uint16_t,
+    mp11::mp_list_c<int, 5, 3, 5>
+>::type;
+
+using packed_pixel_rgb535 = gil::packed_pixel
+<
+    std::uint16_t,
+    packed_channel_references_535,
+    gil::rgb_layout_t
+>;
+
+using bit_aligned_pixel_bgr232_refefence = gil::bit_aligned_pixel_reference
+    <
+        std::uint8_t,
+        mp11::mp_list_c<int, 2, 3, 2>,
+        gil::bgr_layout_t,
+        true
+    > const;
+
+using bit_aligned_pixel_bgr232_iterator = bit_aligned_pixel_iterator<bit_aligned_pixel_bgr232_refefence>;
+
+using bit_aligned_pixel_bgr232 = std::iterator_traits<bit_aligned_pixel_bgr232_iterator>::value_type;
+
+using bit_aligned_pixel_rgb567_refefence = gil::bit_aligned_pixel_reference
+    <
+        std::uint32_t,
+        mp11::mp_list_c<int, 5, 6, 7>,
+        gil::rgb_layout_t,
+        true
+    > const;
+
+using bit_aligned_pixel_rgb567_iterator = bit_aligned_pixel_iterator<bit_aligned_pixel_rgb567_refefence>;
+
+using bit_aligned_pixel_rgb567 = std::iterator_traits<bit_aligned_pixel_rgb567_iterator>::value_type;
+
+}}}} // namespace boost::gil::test::fixture
+
+#endif
diff --git a/src/boost/libs/gil/test/core/point/CMakeLists.txt b/src/boost/libs/gil/test/core/point/CMakeLists.txt
new file mode 100644
index 000000000..e30f6752b
--- /dev/null
+++ b/src/boost/libs/gil/test/core/point/CMakeLists.txt
@@ -0,0 +1,27 @@
+#
+# Copyright (c) 2018 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+foreach(_name
+  concepts
+  point)
+  set(_test t_core_point_${_name})
+  set(_target test_core_point_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/core/point/Jamfile b/src/boost/libs/gil/test/core/point/Jamfile
new file mode 100644
index 000000000..4d0a82928
--- /dev/null
+++ b/src/boost/libs/gil/test/core/point/Jamfile
@@ -0,0 +1,14 @@
+# Boost.GIL (Generic Image Library) - tests
+#
+# Copyright (c) 2018 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+compile concepts.cpp ;
+compile-fail multiply_by_non_arithmetic_fail.cpp ;
+
+run point.cpp ;
diff --git a/src/boost/libs/gil/test/core/point/concepts.cpp b/src/boost/libs/gil/test/core/point/concepts.cpp
new file mode 100644
index 000000000..09c04c524
--- /dev/null
+++ b/src/boost/libs/gil/test/core/point/concepts.cpp
@@ -0,0 +1,51 @@
+//
+// Copyright 2018 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// FIXME: Avoid Clang's flooding of non-disableable warnings like:
+// "T does not declare any constructor to initialize its non-modifiable members"
+// when compiling with concepts check enabled.
+// See https://bugs.llvm.org/show_bug.cgi?id=41759
+#if !defined(BOOST_GIL_USE_CONCEPT_CHECK) && !defined(__clang__)
+#error Compile with BOOST_GIL_USE_CONCEPT_CHECK defined
+#endif
+#include <boost/gil/concepts.hpp>
+#include <boost/gil/point.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+
+template <typename Point>
+void test_members()
+{
+    static_assert(Point::num_dimensions == 2U, "point is not 2D");
+
+    using value_t = typename Point::value_type;
+    using coord_t = typename Point::template axis<0>::coord_t;
+    static_assert(std::is_same<value_t, coord_t>::value,
+                  "point and axis type mismatch");
+}
+
+int main()
+{
+    boost::function_requires<gil::PointNDConcept<gil::point<int>>>();
+    boost::function_requires<gil::PointNDConcept<gil::point_t>>();
+
+    boost::function_requires<gil::Point2DConcept<gil::point<int>>>();
+    boost::function_requires<gil::Point2DConcept<gil::point_t>>();
+
+    test_members<gil::point<int>>();
+    test_members<gil::point_t>();
+
+    // NOTE: point2 is deprecated, available for backward compatibility
+    boost::function_requires<gil::PointNDConcept<gil::point2<int>>>();
+    boost::function_requires<gil::Point2DConcept<gil::point2<int>>>();
+    test_members<gil::point2<int>>();
+
+    return 0;
+}
diff --git a/src/boost/libs/gil/test/core/point/multiply_by_non_arithmetic_fail.cpp b/src/boost/libs/gil/test/core/point/multiply_by_non_arithmetic_fail.cpp
new file mode 100644
index 000000000..b5c703109
--- /dev/null
+++ b/src/boost/libs/gil/test/core/point/multiply_by_non_arithmetic_fail.cpp
@@ -0,0 +1,23 @@
+//
+// Copyright 2018 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/point.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+struct FakeMatrix {};
+
+int main()
+{
+    gil::point<int> p1{2, 4};
+
+    FakeMatrix m1;
+    auto r1 = p1 * m1;
+    auto r2 = m1 * p1;
+}
diff --git a/src/boost/libs/gil/test/core/point/point.cpp b/src/boost/libs/gil/test/core/point/point.cpp
new file mode 100644
index 000000000..00e52f212
--- /dev/null
+++ b/src/boost/libs/gil/test/core/point/point.cpp
@@ -0,0 +1,235 @@
+//
+// Copyright 2018-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/point.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <type_traits>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+void test_default_constructor()
+{
+    gil::point<int> p;
+    BOOST_TEST_EQ(p.x, 0);
+    BOOST_TEST_EQ(p.y, 0);
+}
+
+void test_user_constructor()
+{
+    gil::point<int> p{1, 2};
+    BOOST_TEST_EQ(p.x, 1);
+    BOOST_TEST_EQ(p.y, 2);
+}
+
+void test_copy_constructor()
+{
+    gil::point<int> p1{1, 2};
+    gil::point<int> p2{p1};
+    BOOST_TEST_EQ(p1.x, p2.x);
+    BOOST_TEST_EQ(p1.y, p2.y);
+}
+
+void test_copy_assignment_operator()
+{
+    gil::point<int> p1{1, 2};
+    gil::point<int> p2;
+    p2 = p1;
+    BOOST_TEST_EQ(p1.x, p2.x);
+    BOOST_TEST_EQ(p1.y, p2.y);
+}
+
+void test_index_operator()
+{
+    gil::point<int> p{1, 2};
+    BOOST_TEST_EQ(p[0], 1);
+    BOOST_TEST_EQ(p[1], 2);
+}
+
+void test_addition_operator()
+{
+    gil::point<int> p1{1, 1};
+    gil::point<int> const p2{2, 4};
+    auto p3 = p1 + p2;
+    BOOST_TEST_EQ(p3.x, 3);
+    BOOST_TEST_EQ(p3.y, 5);
+}
+
+void test_addition_assignment_operator()
+{
+    gil::point<int> p1{1, 1};
+    gil::point<int> const p2{2, 4};
+    p1 += p2;
+    BOOST_TEST_EQ(p1.x, 3);
+    BOOST_TEST_EQ(p1.y, 5);
+}
+
+void test_subtraction_assignment_operator()
+{
+    gil::point<int> p1{2, 4};
+    gil::point<int> const p2{1, 1};
+    p1 -= p2;
+    BOOST_TEST_EQ(p1.x, 1);
+    BOOST_TEST_EQ(p1.y, 3);
+}
+
+void test_subtraction_operator()
+{
+    gil::point<int> p1{2, 4};
+    gil::point<int> const p2{1, 1};
+    p1 = p1 - p2;
+    BOOST_TEST_EQ(p1.x, 1);
+    BOOST_TEST_EQ(p1.y, 3);
+}
+
+void test_unary_minus_operator()
+{
+    gil::point<int> p1{2, 4};
+    auto p2 = -p1;
+    BOOST_TEST_EQ(p2.x, -2);
+    BOOST_TEST_EQ(p2.y, -4);
+    p2 = -p2;
+    BOOST_TEST_EQ(p2.x, p1.x);
+    BOOST_TEST_EQ(p2.y, p1.y);
+}
+
+void test_division_assignment_operator()
+{
+    {
+        gil::point<int> p1{2, 4};
+        p1 /= 2;
+        static_assert(std::is_same<decltype((p1 / short{}).x), int>::value, "!int");
+        static_assert(std::is_same<decltype((p1 / int{}).x), int>::value, "!int");
+        static_assert(std::is_same<decltype((p1 / float{}).x), float>::value, "!float");
+        static_assert(std::is_same<decltype((p1 / double{}).x), double>::value, "!double");
+        BOOST_TEST_EQ(p1.x, 1);
+        BOOST_TEST_EQ(p1.y, 2);
+    }
+    // point / d
+    {
+        gil::point<int> p1{2, 4};
+        auto p2 = p1 / float{2};
+        static_assert(std::is_same<decltype((p2 / int{}).x), float>::value, "!float");
+        static_assert(std::is_same<decltype((p2 / float{}).x), float>::value, "!float");
+        static_assert(std::is_same<decltype((p2 / double{}).x), double>::value, "!double");
+        BOOST_TEST_GE(p2.x, 1.0); // means, but >= avoids compiler warning
+        BOOST_TEST_GE(p2.y, 2.0);
+    }
+}
+
+void test_multiplication_operator()
+{
+    gil::point<int> p1{2, 4};
+    p1 *= 2;
+    BOOST_TEST_EQ(p1.x, 4);
+    BOOST_TEST_EQ(p1.y, 8);
+
+    // point * m
+    {
+        auto p2 = p1 * int{2};
+        static_assert(std::is_same<decltype(p2.x), int>::value, "!int");
+        static_assert(std::is_same<decltype(p2.y), int>::value, "!int");
+        BOOST_TEST_EQ(p2.x, 8);
+        BOOST_TEST_EQ(p2.y, 16);
+    }
+    // m * point
+    {
+        auto p2 = double{2} *p1;
+        static_assert(std::is_same<decltype(p2.x), double>::value, "!double");
+        static_assert(std::is_same<decltype(p2.y), double>::value, "!double");
+        BOOST_TEST_GE(p2.x, 8); // means, but >= avoids compiler warning
+        BOOST_TEST_GE(p2.y, 16);
+    }
+}
+
+void test_multiplication_assignment_operator()
+{
+    gil::point<int> p1{2, 4};
+    // point * m
+    {
+        auto p2 = p1 * int{2};
+        static_assert(std::is_same<decltype(p2.x), int>::value, "!int");
+        static_assert(std::is_same<decltype(p2.y), int>::value, "!int");
+        BOOST_TEST_EQ(p2.x, 4);
+        BOOST_TEST_EQ(p2.y, 8);
+    }
+    // m * point
+    {
+        auto p2 = double{2} * p1;
+        static_assert(std::is_same<decltype(p2.x), double>::value, "!double");
+        static_assert(std::is_same<decltype(p2.y), double>::value, "!double");
+        BOOST_TEST_GE(p2.x, 4); // means, but >= avoids compiler warning
+        BOOST_TEST_GE(p2.y, 8);
+    }
+}
+
+void test_bitwise_left_shift_operator()
+{
+    gil::point<unsigned int> p{2, 4};
+    p = p << 1;
+    BOOST_TEST_EQ(p.x, 4u);
+    BOOST_TEST_EQ(p.y, 8u);
+}
+
+void test_bitwise_right_shift_operator()
+{
+    gil::point<unsigned int> p{2, 4};
+    p = p >> 1;
+    BOOST_TEST_EQ(p.x, 2u / 2);
+    BOOST_TEST_EQ(p.y, 4u / 2);
+}
+
+void test_equal_to_operator()
+{
+    gil::point<int> p1{2, 4};
+    gil::point<int> p2{2, 4};
+    BOOST_TEST_EQ(p1, p2);
+}
+
+void test_not_equal_to_operator()
+{
+    gil::point<int> p1{1, 1};
+    gil::point<int> p2{2, 4};
+    BOOST_TEST_NE(p1, p2);
+}
+
+void test_axis_value()
+{
+    gil::point<int> p1{1, 2};
+    gil::point<int> const p2{1, 2};
+    BOOST_TEST_EQ(gil::axis_value<0>(p1), p1.x);
+    BOOST_TEST_EQ(gil::axis_value<1>(p1), p1.y);
+    BOOST_TEST_EQ(gil::axis_value<0>(p2), p2.x);
+    BOOST_TEST_EQ(gil::axis_value<1>(p2), p2.y);
+}
+
+int main()
+{
+    test_default_constructor();
+    test_user_constructor();
+    test_copy_constructor();
+    test_copy_assignment_operator();
+    test_index_operator();
+    test_addition_operator();
+    test_addition_assignment_operator();
+    test_subtraction_assignment_operator();
+    test_subtraction_operator();
+    test_unary_minus_operator();
+    test_division_assignment_operator();
+    test_multiplication_operator();
+    test_multiplication_assignment_operator();
+    test_bitwise_left_shift_operator();
+    test_bitwise_right_shift_operator();
+    test_equal_to_operator();
+    test_not_equal_to_operator();
+    test_axis_value();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/promote_integral.cpp b/src/boost/libs/gil/test/core/promote_integral.cpp
new file mode 100644
index 000000000..d0e97c820
--- /dev/null
+++ b/src/boost/libs/gil/test/core/promote_integral.cpp
@@ -0,0 +1,370 @@
+// Boost.GIL (Generic Image Library)
+//
+// Copyright (c) 2015, Oracle and/or its affiliates.
+// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
+//
+// Licensed under the Boost Software License version 1.0.
+// http://www.boost.org/users/license.html
+//
+// Source: Boost.Geometry (aka GGL, Generic Geometry Library)
+// Modifications: adapted for Boost.GIL
+//  - Rename namespace boost::geometry to boost::gil
+//  - Rename define BOOST_GEOMETRY_TEST_DEBUG to BOOST_GIL_TEST_DEBUG
+//  - Remove use of macro BOOST_GEOMETRY_CONDITION
+//  - Remove support for boost::multiprecision types
+//  - Remove support for 128-bit integer types
+//  - Update and sort includes
+//  - Add explicit conversions to avoid warnings due to implicit integral promotions
+//
+// Uncomment to enable debugging output
+//#define BOOST_GIL_TEST_DEBUG 1
+#include <boost/config.hpp> // BOOST_HAS_LONG_LONG
+#include <boost/gil/promote_integral.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <algorithm>
+#include <climits>
+#include <cstddef>
+#ifdef BOOST_GIL_TEST_DEBUG
+#include <iostream>
+#endif
+#include <limits>
+#include <string>
+
+namespace bg = boost::gil;
+
+template
+<
+    typename T,
+    bool Signed = std::is_fundamental<T>::value && !std::is_unsigned<T>::type::value
+>
+struct absolute_value
+{
+    static inline T apply(T const& t)
+    {
+        return static_cast<T>(t < 0 ? -t : t);
+    }
+};
+
+template <typename T>
+struct absolute_value<T, false>
+{
+    static inline T apply(T const& t)
+    {
+        return t;
+    }
+};
+
+template
+    <
+        typename Integral,
+        typename Promoted,
+        bool Signed = !std::is_unsigned<Promoted>::value
+    >
+struct test_max_values
+{
+    static inline void apply()
+    {
+        // Use >= where value is guaranteed to never be greater than comparator
+        // but to avoid warning: comparing floating point with == is unsafe.
+
+        Promoted min_value = (std::numeric_limits<Integral>::min)();
+        // Explicit casts to avoid warning: conversion to short int from int may alter its value
+        min_value = static_cast<Promoted>(min_value * min_value);
+        BOOST_TEST(absolute_value<Promoted>::apply(min_value) >= min_value);
+        BOOST_TEST(absolute_value<Promoted>::apply(min_value) <= min_value);
+        Promoted max_value = (std::numeric_limits<Integral>::max)();
+        max_value = static_cast<Promoted>(max_value * max_value);
+        BOOST_TEST(absolute_value<Promoted>::apply(max_value) >= max_value);
+        BOOST_TEST(absolute_value<Promoted>::apply(max_value) <= max_value);
+
+#ifdef BOOST_GIL_TEST_DEBUG
+        std::cout << "integral min_value^2: " << min_value << std::endl;
+        std::cout << "promoted max_value:   "
+                  << (std::numeric_limits<Promoted>::max)() << std::endl;
+#endif
+    }
+};
+
+template <typename Integral, typename Promoted>
+struct test_max_values<Integral, Promoted, false>
+{
+    static inline void apply()
+    {
+        Promoted max_value = (std::numeric_limits<Integral>::max)();
+        Promoted max_value_sqr = static_cast<Promoted>(max_value * max_value);
+        BOOST_TEST(max_value_sqr < (std::numeric_limits<Promoted>::max)()
+                    &&
+                    max_value_sqr > max_value);
+
+#ifdef BOOST_GIL_TEST_DEBUG
+        std::cout << "integral max_value^2: " << max_value_sqr << std::endl;
+        std::cout << "promoted max_value:   "
+                  << (std::numeric_limits<Promoted>::max)() << std::endl;
+#endif
+    }
+};
+
+
+// helper function that returns the bit size of a type
+template
+    <
+        typename T,
+        bool IsFundamental = std::is_fundamental<T>::value
+    >
+struct bit_size_impl : std::integral_constant<std::size_t, 0>
+{};
+
+template <typename T>
+struct bit_size_impl<T, true> : bg::detail::promote_integral::bit_size<T>::type
+{};
+
+template <typename T>
+std::size_t bit_size()
+{
+    return bit_size_impl<T>::value;
+}
+
+#define BOOST_CHECK_MESSAGE(expr, msg) BOOST_TEST(expr)
+
+template <bool PromoteUnsignedToUnsigned>
+struct test_promote_integral
+{
+    template <typename Type, typename ExpectedPromotedType>
+    static inline void apply(std::string const& case_id)
+    {
+        using promoted_integral_type = typename bg::promote_integral
+            <
+                Type, PromoteUnsignedToUnsigned
+            >::type;
+
+        bool const same_types = std::is_same
+            <
+                promoted_integral_type, ExpectedPromotedType
+            >::value;
+
+        BOOST_CHECK_MESSAGE(same_types,
+                            "case ID: " << case_id
+                                        << "input type: " << typeid(Type).name()
+                                        << "; detected: "
+                                        << typeid(promoted_integral_type).name()
+                                        << "; expected: "
+                                        << typeid(ExpectedPromotedType).name());
+
+        if (!std::is_same<Type, promoted_integral_type>::value)
+        {
+            test_max_values<Type, promoted_integral_type>::apply();
+        }
+
+#ifdef BOOST_GIL_TEST_DEBUG
+        std::cout << "case ID: " << case_id << std::endl
+                  << "type : " << typeid(Type).name()
+                  << ", sizeof (bits): " << bit_size<Type>()
+                  << ", min value: "
+                  << (std::numeric_limits<Type>::min)()
+                  << ", max value: "
+                  << (std::numeric_limits<Type>::max)()
+                  << std::endl;
+        std::cout << "detected promoted type : "
+                  << typeid(promoted_integral_type).name()
+                  << ", sizeof (bits): " << bit_size<promoted_integral_type>()
+                  << ", min value: "
+                  << (std::numeric_limits<promoted_integral_type>::min)()
+                  << ", max value: "
+                  << (std::numeric_limits<promoted_integral_type>::max)()
+                  << std::endl;
+        std::cout << "expected promoted type : "
+                  << typeid(ExpectedPromotedType).name()
+                  << ", sizeof (bits): " << bit_size<ExpectedPromotedType>()
+                  << ", min value: "
+                  << (std::numeric_limits<ExpectedPromotedType>::min)()
+                  << ", max value: "
+                  << (std::numeric_limits<ExpectedPromotedType>::max)()
+                  << std::endl;
+        std::cout << std::endl;
+#endif
+    }
+};
+
+template
+        <
+                typename T,
+                bool PromoteUnsignedToUnsigned = false,
+                bool IsSigned = !std::is_unsigned<T>::value
+        >
+struct test_promotion
+{
+    static inline void apply(std::string case_id)
+    {
+#ifdef BOOST_GIL_TEST_DEBUG
+        std::cout << "*** "
+                  << (IsSigned ? "signed" : "unsigned")
+                  << " -> signed ***" << std::endl;
+#endif
+
+        using tester = test_promote_integral<PromoteUnsignedToUnsigned>;
+
+        case_id += (PromoteUnsignedToUnsigned ? "-t" : "-f");
+
+        std::size_t min_size = 2 * bit_size<T>() - 1;
+        if (!IsSigned)
+        {
+            min_size += 2;
+        }
+
+#ifdef BOOST_GIL_TEST_DEBUG
+        std::cout << "min size: " << min_size << std::endl;
+#endif
+
+        if (bit_size<short>() >= min_size)
+        {
+            tester::template apply<T, short>(case_id);
+        }
+        else if (bit_size<int>() >= min_size)
+        {
+            tester::template apply<T, int>(case_id);
+        }
+        else if (bit_size<long>() >= min_size)
+        {
+            tester::template apply<T, long>(case_id);
+        }
+#if defined(BOOST_HAS_LONG_LONG)
+        else if (bit_size<boost::long_long_type>() >= min_size)
+        {
+            tester::template apply<T, boost::long_long_type>(case_id);
+        }
+#endif
+        else
+        {
+            tester::template apply<T, T>(case_id);
+        }
+    }
+};
+
+template <typename T>
+struct test_promotion<T, true, false>
+{
+    static inline void apply(std::string case_id)
+    {
+#ifdef BOOST_GIL_TEST_DEBUG
+        std::cout << "*** unsigned -> unsigned ***" << std::endl;
+#endif
+        case_id += "-t";
+
+        using tester = test_promote_integral<true>;
+
+        std::size_t min_size = 2 * bit_size<T>();
+
+#ifdef BOOST_GIL_TEST_DEBUG
+        std::cout << "min size: " << min_size << std::endl;
+#endif
+
+        if (bit_size<unsigned short>() >= min_size)
+        {
+            tester::apply<T, unsigned short>(case_id);
+        }
+        else if (bit_size<unsigned int>() >= min_size)
+        {
+            tester::apply<T, unsigned int>(case_id);
+        }
+        else if (bit_size<unsigned long>() >= min_size)
+        {
+            tester::apply<T, unsigned long>(case_id);
+        }
+        else if (bit_size<std::size_t>() >= min_size)
+        {
+            tester::apply<T, std::size_t>(case_id);
+        }
+#if defined(BOOST_HAS_LONG_LONG)
+        else if (bit_size<boost::ulong_long_type>() >= min_size)
+        {
+            tester::template apply<T, boost::ulong_long_type>(case_id);
+        }
+#endif
+        else
+        {
+            tester::apply<T, T>(case_id);
+        }
+    }
+};
+
+void test_char()
+{
+    test_promotion<char>::apply("char");
+    test_promotion<char, true>::apply("char");
+    test_promotion<signed char>::apply("schar");
+    test_promotion<signed char, true>::apply("schar");
+    test_promotion<unsigned char>::apply("uchar");
+    test_promotion<unsigned char, true>::apply("uchar");
+}
+
+void test_short()
+{
+    test_promotion<short>::apply("short");
+    test_promotion<short, true>::apply("short");
+    test_promotion<unsigned short>::apply("ushort");
+    test_promotion<unsigned short, true>::apply("ushort");
+}
+
+void test_int()
+{
+    test_promotion<int>::apply("int");
+    test_promotion<int, true>::apply("int");
+    test_promotion<unsigned int>::apply("uint");
+    test_promotion<unsigned int, true>::apply("uint");
+}
+
+void test_long()
+{
+    test_promotion<long>::apply("long");
+    test_promotion<long, true>::apply("long");
+    test_promotion<unsigned long>::apply("ulong");
+    test_promotion<unsigned long, true>::apply("ulong");
+}
+
+void test_std_size_t()
+{
+    test_promotion<std::size_t>::apply("size_t");
+    test_promotion<std::size_t, true>::apply("size_t");
+}
+
+#ifdef BOOST_HAS_LONG_LONG
+void test_long_long()
+{
+    test_promotion<boost::long_long_type>::apply("long long");
+    test_promotion<boost::long_long_type, true>::apply("long long");
+    test_promotion<boost::ulong_long_type>::apply("ulong long");
+    test_promotion<boost::ulong_long_type, true>::apply("ulong long");
+}
+#endif
+
+void test_floating_point()
+{
+    using tester1 = test_promote_integral<true>;
+    using tester2 = test_promote_integral<false>;
+
+    // for floating-point types we do not do any promotion
+    tester1::apply<float, float>("fp-f");
+    tester1::apply<double, double>("fp-d");
+    tester1::apply<long double, long double>("fp-ld");
+
+    tester2::apply<float, float>("fp-f");
+    tester2::apply<double, double>("fp-d");
+    tester2::apply<long double, long double>("fp-ld");
+}
+
+int main()
+{
+    test_char();
+    test_short();
+    test_int();
+    test_long();
+    test_std_size_t();
+#ifdef BOOST_HAS_LONG_LONG
+    test_long_long();
+#endif
+    test_floating_point();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/test_fixture.cpp b/src/boost/libs/gil/test/core/test_fixture.cpp
new file mode 100644
index 000000000..d0de5964d
--- /dev/null
+++ b/src/boost/libs/gil/test/core/test_fixture.cpp
@@ -0,0 +1,71 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#if defined(BOOST_CLANG)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wconversion"
+#pragma clang diagnostic ignored "-Wfloat-equal"
+#pragma clang diagnostic ignored "-Wsign-conversion"
+#elif BOOST_GCC >= 40700
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wconversion"
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+#pragma GCC diagnostic ignored "-Wsign-conversion"
+#endif
+
+#include <boost/gil.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <algorithm>
+#include <cstdint>
+#include <vector>
+
+#include "test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+void test_consecutive_value()
+{
+    fixture::consecutive_value<std::uint8_t> v(10);
+    BOOST_TEST_EQ(v(), std::uint8_t{11});
+    BOOST_TEST_EQ(v(), std::uint8_t{12});
+    BOOST_TEST_EQ(v(), std::uint8_t{13});
+}
+
+void test_reverse_consecutive_value()
+{
+    fixture::reverse_consecutive_value<std::uint8_t> v(10);
+    BOOST_TEST_EQ(v(), std::uint8_t{9});
+    BOOST_TEST_EQ(v(), std::uint8_t{8});
+    BOOST_TEST_EQ(v(), std::uint8_t{7});
+}
+
+void test_random_value()
+{
+    // Generate N pseudo-random values
+    fixture::random_value<std::uint8_t> random;
+    std::vector<std::uint8_t> v(10, 0);
+    for (auto& i : v) i = random();
+
+    // Require not all of N values are equal (duplicates are possible!)
+    std::sort(v.begin(), v.end());
+    auto last = std::unique(v.begin(), v.end());
+    v.erase(last, v.end());
+    BOOST_TEST_GT(v.size(), 0);
+    BOOST_TEST_LE(v.size(), 10);
+}
+
+int main()
+{
+    test_consecutive_value();
+    test_reverse_consecutive_value();
+    test_random_value();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/core/test_fixture.hpp b/src/boost/libs/gil/test/core/test_fixture.hpp
new file mode 100644
index 000000000..819b2cac2
--- /dev/null
+++ b/src/boost/libs/gil/test/core/test_fixture.hpp
@@ -0,0 +1,82 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_TEST_CORE_TEST_FIXTURE_HPP
+#define BOOST_GIL_TEST_CORE_TEST_FIXTURE_HPP
+
+#include <boost/gil/promote_integral.hpp>
+#include <boost/assert.hpp>
+
+#include <cstdint>
+#include <initializer_list>
+#include <limits>
+#include <random>
+#include <tuple>
+#include <type_traits>
+
+namespace boost { namespace gil { namespace test { namespace fixture {
+
+template <typename T>
+struct consecutive_value
+{
+    consecutive_value(T start) : current_(start)
+    {
+        BOOST_ASSERT(static_cast<int>(current_) >= 0);
+    }
+
+    T operator()()
+    {
+        BOOST_ASSERT(static_cast<int>(current_) + 1 > 0);
+        current_++;
+        return current_;
+    }
+
+    T current_;
+};
+
+template <typename T>
+struct reverse_consecutive_value
+{
+    reverse_consecutive_value(T start) : current_(start)
+    {
+        BOOST_ASSERT(static_cast<int>(current_) > 0);
+    }
+
+    T operator()()
+    {
+        BOOST_ASSERT(static_cast<int>(current_) + 1 >= 0);
+        current_--;
+        return current_;
+    }
+
+    T current_;
+};
+
+template <typename T>
+struct random_value
+{
+    static_assert(std::is_integral<T>::value, "T must be integral type");
+    static constexpr auto range_min = std::numeric_limits<T>::min();
+    static constexpr auto range_max = std::numeric_limits<T>::max();
+
+    random_value() : rng_(rd_()), uid_(range_min, range_max) {}
+
+    T operator()()
+    {
+        auto value = uid_(rng_);
+        BOOST_ASSERT(range_min <= value && value <= range_max);
+        return static_cast<T>(value);
+    }
+
+    std::random_device rd_;
+    std::mt19937 rng_;
+    std::uniform_int_distribution<typename gil::promote_integral<T>::type> uid_;
+};
+
+}}}} // namespace boost::gil::test::fixture
+
+#endif
diff --git a/src/boost/libs/gil/test/extension/CMakeLists.txt b/src/boost/libs/gil/test/extension/CMakeLists.txt
new file mode 100644
index 000000000..b642d2b29
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/CMakeLists.txt
@@ -0,0 +1,22 @@
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+if(BOOST_GIL_ENABLE_EXT_DYNAMIC_IMAGE)
+  add_subdirectory(dynamic_image)
+endif()
+
+if(BOOST_GIL_ENABLE_EXT_NUMERIC)
+  add_subdirectory(numeric)
+endif()
+
+if(BOOST_GIL_ENABLE_EXT_TOOLBOX)
+  add_subdirectory(toolbox)
+endif()
+
+if(BOOST_GIL_ENABLE_EXT_IO)
+  add_subdirectory(io)
+endif()
diff --git a/src/boost/libs/gil/test/extension/Jamfile b/src/boost/libs/gil/test/extension/Jamfile
new file mode 100644
index 000000000..cf9ef4089
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/Jamfile
@@ -0,0 +1,12 @@
+# Boost.GIL (Generic Image Library) - extensions tests
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+build-project dynamic_image ;
+build-project numeric ;
+build-project toolbox ;
+build-project io ;
diff --git a/src/boost/libs/gil/test/extension/dynamic_image/CMakeLists.txt b/src/boost/libs/gil/test/extension/dynamic_image/CMakeLists.txt
new file mode 100644
index 000000000..cf80e8f8c
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/dynamic_image/CMakeLists.txt
@@ -0,0 +1,27 @@
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+message(STATUS "Boost.GIL: Configuring tests in test/extension/dynamic_image")
+foreach(_name
+  subimage_view)
+  set(_test t_ext_dynamic_image_${_name})
+  set(_target test_ext_dynamic_image_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/extension/dynamic_image/Jamfile b/src/boost/libs/gil/test/extension/dynamic_image/Jamfile
new file mode 100644
index 000000000..5f9bdd23a
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/dynamic_image/Jamfile
@@ -0,0 +1,13 @@
+# Boost.GIL (Generic Image Library) - dynamic_image tests
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+alias headers : [ generate_self_contained_headers extension/dynamic_image ] ;
+
+run subimage_view.cpp ;
diff --git a/src/boost/libs/gil/test/extension/dynamic_image/subimage_view.cpp b/src/boost/libs/gil/test/extension/dynamic_image/subimage_view.cpp
new file mode 100644
index 000000000..b1e22ae5f
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/dynamic_image/subimage_view.cpp
@@ -0,0 +1,96 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/dynamic_image/dynamic_image_all.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_fixture.hpp"
+#include "test_utility_output_stream.hpp"
+#include "core/image/test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+struct test_subimage_equals_image
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        fixture::dynamic_image i0(fixture::create_image<image_t>(4, 4, 128));
+        auto const v0 = gil::const_view(i0);
+        BOOST_TEST_EQ(v0.dimensions().x, 4);
+        BOOST_TEST_EQ(v0.dimensions().y, 4);
+        BOOST_TEST_EQ(v0.size(), 4 * 4);
+
+        // request with 2 x point_t values
+        {
+            auto v1 = gil::subimage_view(gil::view(i0), {0, 0}, i0.dimensions());
+            BOOST_TEST_EQ(v0.dimensions(), v1.dimensions());
+            BOOST_TEST_EQ(v0.size(), v1.size());
+            BOOST_TEST(gil::equal_pixels(v0, v1));
+        }
+        // request with 4 x dimension values
+        {
+            auto v1 = gil::subimage_view(gil::view(i0), 0, 0, i0.dimensions().x, i0.dimensions().y);
+            BOOST_TEST_EQ(v0.dimensions(), v1.dimensions());
+            BOOST_TEST_EQ(v0.size(), v1.size());
+            BOOST_TEST(gil::equal_pixels(v0, v1));
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_subimage_equals_image{});
+    }
+};
+
+struct test_subimage_equals_image_quadrants
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        fixture::dynamic_image i0(fixture::create_image<image_t>(4, 4, 0));
+        auto v0 = gil::view(i0);
+        // create test image and set values of pixels in:
+        //  quadrant 1
+        auto const i1 = fixture::create_image<image_t>(2, 2, 255);
+        gil::apply_operation(v0, fixture::fill_any_view<image_t>({2, 3, 6, 7}, gil::const_view(i1)[0]));
+        //  quadrant 2
+        auto const i2 = fixture::create_image<image_t>(2, 2, 128);
+        gil::apply_operation(v0, fixture::fill_any_view<image_t>({0, 1, 4, 5}, gil::const_view(i2)[0]));
+        //  quadrant 3
+        auto const i3 = fixture::create_image<image_t>(2, 2, 64);
+        gil::apply_operation(v0, fixture::fill_any_view<image_t>({8, 9, 12, 13}, gil::const_view(i3)[0]));
+        //  quadrant 4
+        auto const i4 = fixture::create_image<image_t>(2, 2, 32);
+        gil::apply_operation(v0, fixture::fill_any_view<image_t>({10, 11, 14, 15}, gil::const_view(i4)[0]));
+
+        auto v1 = gil::subimage_view(gil::view(i0), { 2, 0 }, i0.dimensions() / 2);
+        BOOST_TEST(gil::equal_pixels(v1, gil::const_view(i1)));
+        auto v2 = gil::subimage_view(gil::view(i0), { 0, 0 }, i0.dimensions() / 2);
+        BOOST_TEST(gil::equal_pixels(v2, gil::const_view(i2)));
+        auto v3 = gil::subimage_view(gil::view(i0), { 0, 2 }, i0.dimensions() / 2);
+        BOOST_TEST(gil::equal_pixels(v3, gil::const_view(i3)));
+        auto v4 = gil::subimage_view(gil::view(i0), { 2, 2 }, i0.dimensions() / 2);
+        BOOST_TEST(gil::equal_pixels(v4, gil::const_view(i4)));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_subimage_equals_image_quadrants{});
+    }
+};
+
+int main()
+{
+    test_subimage_equals_image::run();
+    test_subimage_equals_image_quadrants::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/dynamic_image/test_fixture.hpp b/src/boost/libs/gil/test/extension/dynamic_image/test_fixture.hpp
new file mode 100644
index 000000000..00b1b38cf
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/dynamic_image/test_fixture.hpp
@@ -0,0 +1,61 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/dynamic_image/any_image.hpp>
+#include <boost/mp11.hpp>
+
+#include <tuple>
+
+namespace boost { namespace gil {
+
+namespace test { namespace fixture {
+
+using dynamic_image = gil::any_image
+<
+    boost::mp11::mp_list
+    <
+        gil::gray8_image_t,
+        gil::gray16_image_t,
+        gil::gray32_image_t,
+        gil::bgr8_image_t,
+        gil::bgr16_image_t,
+        gil::bgr32_image_t,
+        gil::rgb8_image_t,
+        gil::rgb16_image_t,
+        gil::rgb32_image_t,
+        gil::rgba8_image_t,
+        gil::rgba16_image_t,
+        gil::rgba32_image_t
+    >
+>;
+
+template <typename Image>
+struct fill_any_view
+{
+    using result_type = void;
+    using pixel_t = typename Image::value_type;
+
+    fill_any_view(std::initializer_list<int> dst_view_indices, pixel_t pixel_value)
+        : dst_view_indices_(dst_view_indices), pixel_value_(pixel_value)
+    {}
+
+    template <typename View>
+    void operator()(View& /*dst_view*/) { /* sink any other views here */ }
+
+    void operator()(typename Image::view_t& dst_view)
+    {
+        // sink view of interest here
+        for (auto const& i : dst_view_indices_)
+            dst_view[i] = pixel_value_;
+    }
+
+    std::initializer_list<int> dst_view_indices_;
+    pixel_t pixel_value_;
+};
+
+}}}} // namespace boost::gil::test::fixture
diff --git a/src/boost/libs/gil/test/extension/io/CMakeLists.txt b/src/boost/libs/gil/test/extension/io/CMakeLists.txt
new file mode 100644
index 000000000..bc4fe25a4
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/CMakeLists.txt
@@ -0,0 +1,19 @@
+#
+# Copyright (c) 2017-2020 Mateusz Loskot <mateusz at loskot dot net>
+# All rights reserved.
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+message(STATUS "Boost.GIL: Configuring tests in test/extension/io")
+
+add_executable(test_ext_io_simple "simple_all_formats.cpp")
+target_link_libraries(test_ext_io_simple
+  PRIVATE
+    gil_compile_options
+    gil_include_directories
+    gil_dependencies)
+add_test(NAME t_ext_io_simple COMMAND test_ext_io_simple)
+
+# TODO: Add <format>/CMakeLists.txt configuration for each format ~mloskot
diff --git a/src/boost/libs/gil/test/extension/io/Jamfile b/src/boost/libs/gil/test/extension/io/Jamfile
new file mode 100644
index 000000000..6e1705d7c
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/Jamfile
@@ -0,0 +1,49 @@
+# Boost.GIL (Generic Image Library) - IO tests
+#
+# Copyright (c) 2012 Christian Henning
+# Copyright (c) 2017 Stefan Seefeld
+# Copyright (c) 2012-2020 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import ac ;
+import testing ;
+
+using libjpeg : : : : true ; # work around bug on master
+using zlib ;
+using libpng : : : : true ;
+using libtiff : : : : true ;
+
+lib libraw : : <name>raw ;
+
+project
+  :
+    requirements
+      <include>.
+  ;
+
+alias headers : [ generate_self_contained_headers extension/io ] ;
+explicit headers ;
+
+# The `simple` in names of targets, somewhat misleading, means two things:
+# - minimal set of tests
+# - set of tests that require third-party libraries which are de-facto ubiquitous
+alias simple
+  :
+    [
+      run simple_all_formats.cpp
+      : # args
+      : # input files
+      : # requirements
+        <library>/boost/filesystem//boost_filesystem
+        [ ac.check-library /libjpeg//libjpeg : <library>/libjpeg//libjpeg : <build>no ]
+        [ ac.check-library /zlib//zlib : <library>/zlib//zlib : <build>no ]
+        [ ac.check-library /libpng//libpng : <library>/libpng//libpng : <build>no ]
+        [ ac.check-library /libtiff//libtiff : <library>/libtiff//libtiff : <build>no ]
+    ]
+  ;
+
+alias full : bmp jpeg png pnm raw targa tiff ;
+explicit full ;
diff --git a/src/boost/libs/gil/test/extension/io/bmp/Jamfile b/src/boost/libs/gil/test/extension/io/bmp/Jamfile
new file mode 100644
index 000000000..f1cfe092a
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/bmp/Jamfile
@@ -0,0 +1,26 @@
+# Boost.GIL (Generic Image Library) - IO tests
+#
+# Copyright (c) 2012 Christian Henning
+# Copyright (c) 2017 Stefan Seefeld
+# Copyright (c) 2012-2020 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+# TODO: Download BMP test suite images and build with <define>BOOST_GIL_IO_USE_BMP_TEST_SUITE_IMAGES
+
+project
+   : requirements
+      <library>/boost/filesystem//boost_filesystem
+   ;
+
+run bmp_make.cpp ;
+
+run bmp_test.cpp ;
+run bmp_read_test.cpp ;
+run bmp_write_test.cpp ;
+
+run bmp_old_test.cpp ;
diff --git a/src/boost/libs/gil/test/extension/io/bmp/bmp_make.cpp b/src/boost/libs/gil/test/extension/io/bmp/bmp_make.cpp
new file mode 100644
index 000000000..26be07726
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/bmp/bmp_make.cpp
@@ -0,0 +1,289 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#define BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
+#define BOOST_FILESYSTEM_VERSION 3
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/bmp.hpp>
+
+#include <boost/gil.hpp>
+#include <boost/gil/detail/mp11.hpp>
+
+#include <boost/core/ignore_unused.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include <fstream>
+#include <string>
+#include <type_traits>
+
+#include "paths.hpp"
+
+namespace fs = boost::filesystem;
+namespace gil = boost::gil;
+
+void test_make_reader_backend()
+{
+    {
+        static_assert(
+            std::is_same<gil::detail::is_supported_path_spec<char*>::type, std::true_type>::value,
+            "");
+
+        gil::get_reader_backend<const char*, gil::bmp_tag>::type backend_char =
+            gil::make_reader_backend(bmp_filename.c_str(), gil::bmp_tag());
+        gil::get_reader_backend<std::string, gil::bmp_tag>::type backend_string =
+            gil::make_reader_backend(bmp_filename, gil::bmp_tag());
+
+        FILE* file = fopen(bmp_filename.c_str(), "rb");
+        gil::get_reader_backend<FILE*, gil::bmp_tag>::type backend_file =
+            gil::make_reader_backend(file, gil::bmp_tag());
+
+        std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+        gil::get_reader_backend<std::ifstream, gil::bmp_tag>::type backend_ifstream =
+            gil::make_reader_backend(in, gil::bmp_tag());
+
+        fs::path my_path(bmp_filename);
+        gil::get_reader_backend<std::wstring, gil::bmp_tag>::type backend_wstring =
+            gil::make_reader_backend(my_path.wstring(), gil::bmp_tag());
+        gil::get_reader_backend<fs::path, gil::bmp_tag>::type backend_path =
+            gil::make_reader_backend(my_path, gil::bmp_tag());
+    }
+    {
+        gil::get_reader_backend<const char*, gil::bmp_tag>::type backend_char =
+            gil::make_reader_backend(bmp_filename.c_str(), gil::image_read_settings<gil::bmp_tag>());
+        gil::get_reader_backend<std::string, gil::bmp_tag>::type backend_string =
+            gil::make_reader_backend(bmp_filename, gil::image_read_settings<gil::bmp_tag>());
+
+        FILE* file = fopen(bmp_filename.c_str(), "rb");
+        gil::get_reader_backend<FILE*, gil::bmp_tag>::type backend_file =
+            gil::make_reader_backend(file, gil::image_read_settings<gil::bmp_tag>());
+
+        std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+        gil::get_reader_backend<std::ifstream, gil::bmp_tag>::type backend_ifstream =
+            gil::make_reader_backend(in, gil::image_read_settings<gil::bmp_tag>());
+
+        fs::path my_path(bmp_filename);
+        gil::get_reader_backend<std::wstring, gil::bmp_tag>::type backend_wstring =
+            gil::make_reader_backend(my_path.wstring(), gil::image_read_settings<gil::bmp_tag>());
+        gil::get_reader_backend<fs::path, gil::bmp_tag>::type backend_path =
+            gil::make_reader_backend(my_path, gil::image_read_settings<gil::bmp_tag>());
+    }
+}
+
+void test_make_reader()
+{
+    {
+        gil::get_reader_backend<const char*, gil::bmp_tag>::type reader_char = gil::make_reader(
+            bmp_filename.c_str(), gil::bmp_tag(), gil::detail::read_and_no_convert());
+        gil::get_reader_backend<std::string, gil::bmp_tag>::type reader_string =
+            gil::make_reader(bmp_filename, gil::bmp_tag(), gil::detail::read_and_no_convert());
+
+        FILE* file = fopen(bmp_filename.c_str(), "rb");
+        gil::get_reader_backend<FILE*, gil::bmp_tag>::type reader_file =
+            gil::make_reader(file, gil::bmp_tag(), gil::detail::read_and_no_convert());
+
+        std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+        gil::get_reader_backend<std::ifstream, gil::bmp_tag>::type reader_ifstream =
+            gil::make_reader(in, gil::bmp_tag(), gil::detail::read_and_no_convert());
+
+        fs::path my_path(bmp_filename);
+        gil::get_reader_backend<std::wstring, gil::bmp_tag>::type reader_wstring =
+            gil::make_reader(my_path.wstring(), gil::bmp_tag(), gil::detail::read_and_no_convert());
+        gil::get_reader_backend<fs::path, gil::bmp_tag>::type reader_path =
+            gil::make_reader(my_path, gil::bmp_tag(), gil::detail::read_and_no_convert());
+    }
+    {
+        gil::get_reader_backend<const char*, gil::bmp_tag>::type reader_char = gil::make_reader(
+            bmp_filename.c_str(), gil::image_read_settings<gil::bmp_tag>(),
+            gil::detail::read_and_no_convert());
+        gil::get_reader_backend<std::string, gil::bmp_tag>::type reader_string = gil::make_reader(
+            bmp_filename, gil::image_read_settings<gil::bmp_tag>(),
+            gil::detail::read_and_no_convert());
+
+        FILE* file = fopen(bmp_filename.c_str(), "rb");
+        gil::get_reader_backend<FILE*, gil::bmp_tag>::type reader_file = gil::make_reader(
+            file, gil::image_read_settings<gil::bmp_tag>(), gil::detail::read_and_no_convert());
+
+        std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+        gil::get_reader_backend<std::ifstream, gil::bmp_tag>::type reader_ifstream =
+            gil::make_reader(
+                in, gil::image_read_settings<gil::bmp_tag>(), gil::detail::read_and_no_convert());
+
+        fs::path my_path(bmp_filename);
+        gil::get_reader_backend<std::wstring, gil::bmp_tag>::type reader_wstring = gil::make_reader(
+            my_path.wstring(), gil::image_read_settings<gil::bmp_tag>(),
+            gil::detail::read_and_no_convert());
+        gil::get_reader_backend<fs::path, gil::bmp_tag>::type reader_path = gil::make_reader(
+            my_path, gil::image_read_settings<gil::bmp_tag>(), gil::detail::read_and_no_convert());
+    }
+}
+
+void test_make_dynamic_image_reader()
+{
+    {
+        gil::get_dynamic_image_reader<const char*, gil::bmp_tag>::type reader_char =
+            gil::make_dynamic_image_reader(bmp_filename.c_str(), gil::bmp_tag());
+        gil::get_dynamic_image_reader<std::string, gil::bmp_tag>::type reader_string =
+            gil::make_dynamic_image_reader(bmp_filename, gil::bmp_tag());
+
+        FILE* file = fopen(bmp_filename.c_str(), "rb");
+        gil::get_dynamic_image_reader<FILE*, gil::bmp_tag>::type reader_file =
+            gil::make_dynamic_image_reader(file, gil::bmp_tag());
+
+        std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+        gil::get_dynamic_image_reader<std::ifstream, gil::bmp_tag>::type reader_ifstream =
+            gil::make_dynamic_image_reader(in, gil::bmp_tag());
+
+        fs::path my_path(bmp_filename);
+        gil::get_dynamic_image_reader<std::wstring, gil::bmp_tag>::type reader_wstring =
+            gil::make_dynamic_image_reader(my_path.wstring(), gil::bmp_tag());
+        gil::get_dynamic_image_reader<fs::path, gil::bmp_tag>::type reader_path =
+            gil::make_dynamic_image_reader(my_path, gil::bmp_tag());
+    }
+    {
+        gil::get_dynamic_image_reader<const char*, gil::bmp_tag>::type reader_char =
+            gil::make_dynamic_image_reader(
+                bmp_filename.c_str(), gil::image_read_settings<gil::bmp_tag>());
+        gil::get_dynamic_image_reader<std::string, gil::bmp_tag>::type reader_string =
+            gil::make_dynamic_image_reader(bmp_filename, gil::image_read_settings<gil::bmp_tag>());
+
+        FILE* file = fopen(bmp_filename.c_str(), "rb");
+        gil::get_dynamic_image_reader<FILE*, gil::bmp_tag>::type reader_file =
+            gil::make_dynamic_image_reader(file, gil::image_read_settings<gil::bmp_tag>());
+
+        std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+        gil::get_dynamic_image_reader<std::ifstream, gil::bmp_tag>::type reader_ifstream =
+            gil::make_dynamic_image_reader(in, gil::image_read_settings<gil::bmp_tag>());
+
+        fs::path my_path(bmp_filename);
+        gil::get_dynamic_image_reader<std::wstring, gil::bmp_tag>::type reader_wstring =
+            gil::make_dynamic_image_reader(
+                my_path.wstring(), gil::image_read_settings<gil::bmp_tag>());
+        gil::get_dynamic_image_reader<fs::path, gil::bmp_tag>::type reader_path =
+            gil::make_dynamic_image_reader(my_path, gil::image_read_settings<gil::bmp_tag>());
+    }
+}
+
+void test_make_writer()
+{
+    // Empty files may be created, but noo image data is written.
+    {
+        using writer_t = gil::get_writer<char const*, gil::bmp_tag>::type;
+
+        static_assert(
+            std::is_same<gil::detail::is_writer<writer_t>::type, std::true_type>::value, "");
+    }
+    {
+        gil::get_writer<const char*, gil::bmp_tag>::type writer_char =
+            gil::make_writer((bmp_out + "make_test.bmp").c_str(), gil::bmp_tag());
+        gil::get_writer<std::string, gil::bmp_tag>::type writer_string =
+            gil::make_writer((bmp_out + "make_test.bmp"), gil::bmp_tag());
+
+        FILE* file = fopen((bmp_out + "make_test.bmp").c_str(), "wb");
+        gil::get_writer<FILE*, gil::bmp_tag>::type writer_file =
+            gil::make_writer(file, gil::bmp_tag());
+
+        std::ofstream out((bmp_out + "make_test.bmp").c_str(), std::ios::binary);
+        gil::get_writer<std::ofstream, gil::bmp_tag>::type writer_ofstream =
+            gil::make_writer(out, gil::image_write_info<gil::bmp_tag>());
+        boost::ignore_unused(writer_ofstream);
+
+        fs::path my_path((bmp_out + "make_test.bmp").c_str());
+        gil::get_writer<std::wstring, gil::bmp_tag>::type writer_wstring =
+            gil::make_writer(my_path.wstring(), gil::bmp_tag());
+        gil::get_writer<fs::path, gil::bmp_tag>::type writer_path =
+            gil::make_writer(my_path, gil::bmp_tag());
+    }
+    {
+        gil::get_writer<const char*, gil::bmp_tag>::type writer_char =
+            gil::make_writer((bmp_out + "make_test.bmp").c_str(), gil::image_write_info<gil::bmp_tag>());
+        gil::get_writer<std::string, gil::bmp_tag>::type writer_string =
+            gil::make_writer((bmp_out + "make_test.bmp"), gil::image_write_info<gil::bmp_tag>());
+
+        FILE* file = fopen((bmp_out + std::string("make_test.bmp")).c_str(), "wb");
+        gil::get_writer<FILE*, gil::bmp_tag>::type writer_file =
+            gil::make_writer(file, gil::image_write_info<gil::bmp_tag>());
+
+        std::ofstream out((bmp_out + "make_test.bmp").c_str(), std::ios::binary);
+        gil::get_writer<std::ofstream, gil::bmp_tag>::type writer_ofstream =
+            gil::make_writer(out, gil::image_write_info<gil::bmp_tag>());
+        boost::ignore_unused(writer_ofstream);
+
+        fs::path my_path(bmp_out + "make_test.bmp");
+        gil::get_writer<std::wstring, gil::bmp_tag>::type writer_wstring =
+            gil::make_writer(my_path.wstring(), gil::image_write_info<gil::bmp_tag>());
+        gil::get_writer<fs::path, gil::bmp_tag>::type writer_path =
+            gil::make_writer(my_path, gil::image_write_info<gil::bmp_tag>());
+    }
+}
+
+void test_make_dynamic_image_writer()
+{
+    // Empty files may be created, but noo image data is written.
+    {
+        gil::get_dynamic_image_writer<const char*, gil::bmp_tag>::type writer_char =
+            gil::make_dynamic_image_writer(
+                (bmp_out + std::string("make_test.bmp")).c_str(), gil::bmp_tag());
+        gil::get_dynamic_image_writer<std::string, gil::bmp_tag>::type writer_string =
+            gil::make_dynamic_image_writer(bmp_out + "make_test.bmp", gil::bmp_tag());
+
+        FILE* file = fopen((bmp_out + std::string("make_test.bmp")).c_str(), "wb");
+        gil::get_dynamic_image_writer<FILE*, gil::bmp_tag>::type writer_file =
+            gil::make_dynamic_image_writer(file, gil::bmp_tag());
+
+        std::ofstream out((bmp_out + "make_test.bmp").c_str(), std::ios::binary);
+        gil::get_dynamic_image_writer<std::ofstream, gil::bmp_tag>::type writer_ofstream =
+            gil::make_dynamic_image_writer(out, gil::bmp_tag());
+        boost::ignore_unused(writer_ofstream);
+
+        fs::path my_path(bmp_out + "make_test.bmp");
+        gil::get_dynamic_image_writer<std::wstring, gil::bmp_tag>::type writer_wstring =
+            gil::make_dynamic_image_writer(my_path.wstring(), gil::bmp_tag());
+        gil::get_dynamic_image_writer<fs::path, gil::bmp_tag>::type writer_path =
+            gil::make_dynamic_image_writer(my_path, gil::bmp_tag());
+    }
+    {
+        gil::get_dynamic_image_writer<const char*, gil::bmp_tag>::type writer_char =
+            gil::make_dynamic_image_writer(
+                (bmp_out + std::string("make_test.bmp")).c_str(), gil::image_write_info<gil::bmp_tag>());
+
+        gil::get_dynamic_image_writer<std::string, gil::bmp_tag>::type writer_string =
+            gil::make_dynamic_image_writer(
+                bmp_out + "make_test.bmp", gil::image_write_info<gil::bmp_tag>());
+
+        FILE* file = fopen((bmp_out + std::string("make_test.bmp")).c_str(), "wb");
+        gil::get_dynamic_image_writer<FILE*, gil::bmp_tag>::type writer_file =
+            gil::make_dynamic_image_writer(file, gil::image_write_info<gil::bmp_tag>());
+
+        std::ofstream out((bmp_out + "make_test.bmp").c_str(), std::ios::binary);
+        gil::get_dynamic_image_writer<std::ofstream, gil::bmp_tag>::type writer_ofstream =
+            gil::make_dynamic_image_writer(out, gil::image_write_info<gil::bmp_tag>());
+        boost::ignore_unused(writer_ofstream);
+
+        fs::path my_path(bmp_out + "make_test.bmp");
+        gil::get_dynamic_image_writer<std::wstring, gil::bmp_tag>::type writer_wstring =
+            gil::make_dynamic_image_writer(my_path.wstring(), gil::image_write_info<gil::bmp_tag>());
+        gil::get_dynamic_image_writer<fs::path, gil::bmp_tag>::type writer_path =
+            gil::make_dynamic_image_writer(my_path, gil::image_write_info<gil::bmp_tag>());
+    }
+}
+
+int main(int argc, char *argv[])
+{
+    try
+    {
+        test_make_reader_backend();
+        test_make_reader();
+        test_make_dynamic_image_reader();
+        test_make_writer();
+        test_make_dynamic_image_writer();
+    }
+    catch (std::exception const& e)
+    {
+        BOOST_ERROR(e.what());
+    }
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/bmp/bmp_old_test.cpp b/src/boost/libs/gil/test/extension/io/bmp/bmp_old_test.cpp
new file mode 100644
index 000000000..bd7fd27d8
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/bmp/bmp_old_test.cpp
@@ -0,0 +1,97 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/bmp/old.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+void test_old_read_dimensions()
+{
+    boost::gil::point_t dim = gil::bmp_read_dimensions(bmp_filename);
+    BOOST_TEST_EQ(dim.x, 1000);
+    BOOST_TEST_EQ(dim.y, 600);
+}
+
+void test_old_read_image()
+{
+    gil::rgb8_image_t img;
+    gil::bmp_read_image(bmp_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 1000);
+    BOOST_TEST_EQ(img.height(), 600);
+}
+
+void test_old_read_and_convert_image()
+{
+    gil::rgb8_image_t img;
+    gil::bmp_read_and_convert_image(bmp_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 1000);
+    BOOST_TEST_EQ(img.height(), 600);
+}
+
+void test_old_read_view()
+{
+    gil::rgb8_image_t img(1000, 600);
+    gil::bmp_read_view(bmp_filename, view(img));
+}
+
+void test_old_read_and_convert_view()
+{
+    gil::rgb8_image_t img(1000, 600);
+    gil::bmp_read_and_convert_view(bmp_filename, view(img));
+}
+
+void test_old_write_view()
+{
+    auto b = gil::rgb8_pixel_t(0, 0, 255);
+    auto g = gil::rgb8_pixel_t(0, 255, 0);
+    gil::bmp_write_view(bmp_out + "old_write_view_test.bmp", create_mandel_view(1000, 600, b, g));
+}
+
+void test_old_dynamic_image()
+{
+    using my_img_types = mp11::mp_list
+    <
+        gil::gray8_image_t,
+        gil::gray16_image_t,
+        gil::rgb8_image_t,
+        gil::rgba8_image_t
+    >;
+
+    gil::any_image<my_img_types> image;
+    gil::bmp_read_image(bmp_filename.c_str(), image);
+
+    gil::bmp_write_view(bmp_out + "old_dynamic_image_test.bmp", gil::view(image));
+}
+
+int main(int argc, char *argv[])
+{
+    try
+    {
+        test_old_read_dimensions();
+        test_old_read_image();
+        test_old_read_and_convert_image();
+        test_old_read_view();
+        test_old_read_and_convert_view();
+        test_old_write_view();
+        test_old_dynamic_image();
+    }
+    catch (std::exception const& e)
+    {
+        BOOST_ERROR(e.what());
+    }
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/bmp/bmp_read_test.cpp b/src/boost/libs/gil/test/extension/io/bmp/bmp_read_test.cpp
new file mode 100644
index 000000000..5d36c22de
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/bmp/bmp_read_test.cpp
@@ -0,0 +1,463 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/bmp.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "paths.hpp"
+#include "scanline_read_test.hpp"
+
+#include <string>
+
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+template <typename Image>
+void write(Image& img, std::string const& file_name)
+{
+    write_view(bmp_out + file_name, gil::view(img), gil::bmp_tag());
+}
+
+void test_read_header()
+{
+    using backend_t = gil::get_reader_backend<std::string const, gil::bmp_tag>::type;
+    backend_t backend = gil::read_image_info(bmp_filename, gil::bmp_tag());
+    BOOST_TEST_EQ(backend._info._offset               ,      54u);
+    BOOST_TEST_EQ(backend._info._header_size          ,      40u);
+    BOOST_TEST_EQ(backend._info._width                ,     1000);
+    BOOST_TEST_EQ(backend._info._height               ,      600);
+    BOOST_TEST_EQ(backend._info._bits_per_pixel       ,       24);
+    BOOST_TEST_EQ(backend._info._compression          ,       0u);
+    BOOST_TEST_EQ(backend._info._image_size           , 1800000u);
+    BOOST_TEST_EQ(backend._info._horizontal_resolution,        0);
+    BOOST_TEST_EQ(backend._info._vertical_resolution  ,        0);
+    BOOST_TEST_EQ(backend._info._num_colors           ,       0u);
+    BOOST_TEST_EQ(backend._info._num_important_colors ,       0u);
+    BOOST_TEST_EQ(backend._info._valid                ,     true);
+}
+
+#ifdef BOOST_GIL_IO_USE_BMP_TEST_SUITE_IMAGES
+void test_read_reference_images_test()
+{
+    // comments are taken from http://entropymine.com/jason/bmpsuite/reference/reference.html
+
+    // g01bw.bmp - black and white palette (#000000,#FFFFFF)
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g01bw.bmp", img, gil::bmp_tag());
+    }
+
+    // g01wb.bmp - white and black palette (#FFFFFF,#000000).
+    // Should look the same as g01bw, not inverted.
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g01wb.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g01wb.bmp");
+    }
+
+    // g01bg.bmp - blue and green palette (#4040FF,#40FF40)
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g01bg.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g01bg.bmp");
+    }
+
+    // g01p1.bmp - 1-color (blue) palette (#4040FF)
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g01p1.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g01p1.bmp");
+    }
+
+    // g04.bmp - basic 4bpp (16 color) image
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g04.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+        write(img, "g04.bmp");
+    }
+
+    // g04rle.bmp - RLE compressed.
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(bmp_in + "g04rle.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g04rle.bmp");
+    }
+
+    // g04p4.bmp - 4-color grayscale palette
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g04p4.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g04p4.bmp");
+    }
+
+    // g08.bmp - basic 8bpp (256 color) image
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08.bmp");
+    }
+
+    // g08p256.bmp - biClrUsed=256, biClrImportant=0 [=256]
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08p256.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08p256.bmp");
+    }
+
+    // g08pi256.bmp - biClrUsed=256, biClrImportant=256
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08pi256.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08pi256.bmp");
+    }
+
+    // g08pi64.bmp - biClrUsed=256, biClrImportant=64. It's barely possible that some
+    // sophisticated viewers may display this image in grayscale, if there are a
+    // limited number of colors available.
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08pi64.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08pi64.bmp");
+    }
+
+    // g08rle.bmp - RLE compressed.
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(bmp_in + "g08rle.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08rle.bmp");
+    }
+
+    // g08os2.bmp - OS/2-style bitmap. This is an obsolete variety of BMP
+    // that is still encountered sometimes. It has 3-byte palette
+    // entries (instead of 4), and 16-bit width/height fields (instead of 32).
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(bmp_in + "g08os2.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08os2.bmp");
+    }
+
+    // g08res22.bmp - resolution 7874x7874 pixels/meter (200x200 dpi)
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08res22.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08res22.bmp");
+    }
+
+    // g08res11.bmp - resolution 3937x3937 pixels/meter (100x100 dpi)
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08res11.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08res11.bmp");
+    }
+
+    // g08res21.bmp resolution 7874x3937 pixels/meter (200x100 dpi).
+    // Some programs (e.g. Imaging for Windows) may display this image
+    // stretched vertically, which is the optimal thing to do if the
+    // program is primarily a viewer, rather than an editor.
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08res21.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08res21.bmp");
+    }
+
+    // g08s0.bmp - bits size not given (set to 0). This is legal for uncompressed bitmaps.
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08s0.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08s0.bmp");
+    }
+
+    // g08offs.bmp - bfOffBits in header not set to the usual value.
+    // There are 100 extra unused bytes between palette and bits.
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08offs.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08offs.bmp");
+    }
+
+    // g08w126.bmp - size 126x63 (right and bottom slightly clipped)
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08w126.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 126u);
+        BOOST_TEST_EQ(view(img).height(), 63u);
+
+        write(img, "g08w126.bmp");
+    }
+
+    // g08w125.bmp - size 125x62
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08w125.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 125u);
+        BOOST_TEST_EQ(view(img).height(), 62u);
+
+        write(img, "g08w125.bmp");
+    }
+
+    // g08w124.bmp - size 124x61
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08w124.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 124u);
+        BOOST_TEST_EQ(view(img).height(), 61u);
+
+        write(img, "g08w124.bmp");
+    }
+
+    // g08p64.bmp - 64-color grayscale palette
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g08p64.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g08p64.bmp");
+    }
+
+    // g16def555.bmp - 15-bit color (1 bit wasted), biCompression=BI_RGB (no bitfields, defaults to 5-5-5)
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(bmp_in + "g16def555.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g16def555.bmp");
+    }
+
+    // g16bf555.bmp - 15-bit color, biCompression=BI_BITFIELDS (bitfields indicate 5-5-5)
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(bmp_in + "g16bf555.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g16bf555.bmp");
+    }
+
+    // g16bf565.bmp - 16-bit color, biCompression=BI_BITFIELDS (bitfields indicate 5-6-5)
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(bmp_in + "g16bf565.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g16bf565.bmp");
+    }
+
+    // g24.bmp - 24-bit color (BGR)
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(bmp_in + "g24.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g24.bmp");
+    }
+
+    // g32def.bmp - 24-bit color (8 bits wasted), biCompression=BI_RGB (no bitfields, defaults to BGRx)
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g32def.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g32def.bmp");
+    }
+
+    // g32bf.bmp - 24-bit color (8 bits wasted), biCompression=BI_BITFIELDS (bitfields indicate BGRx)
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(bmp_in + "g32bf.bmp", img, gil::bmp_tag());
+        BOOST_TEST_EQ(view(img).width(), 127u);
+        BOOST_TEST_EQ(view(img).height(), 64u);
+
+        write(img, "g32bf.bmp");
+    }
+}
+
+void test_read_reference_images_image_iterator()
+{
+    // comments are taken from http://entropymine.com/jason/bmpsuite/reference/reference.html
+
+    // g01bw.bmp - black and white palette (#000000,#FFFFFF)
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g01bw.bmp").c_str());
+
+    // g01wb.bmp - white and black palette (#FFFFFF,#000000).
+    // Should look the same as g01bw, not inverted.
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g01wb.bmp").c_str());
+
+    // g01bg.bmp - blue and green palette (#4040FF,#40FF40)
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g01bg.bmp").c_str());
+
+    // g01p1.bmp - 1-color (blue) palette (#4040FF)
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g01p1.bmp").c_str());
+
+    // g04.bmp - basic 4bpp (16 color) image
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g04.bmp").c_str());
+
+    // not supported
+    // g04rle.bmp - RLE compressed.
+    //test_scanline_reader<gil::bgra8_image_t, gil::bmp_tag>(std::string(bmp_in + "g01bg.bmp").c_str());
+
+    // g04p4.bmp - 4-color grayscale palette
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g04p4.bmp").c_str());
+
+    // g08.bmp - basic 8bpp (256 color) image
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08.bmp").c_str());
+
+    // g08p256.bmp - biClrUsed=256, biClrImportant=0 [=256]
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08p256.bmp").c_str());
+
+    // g08pi256.bmp - biClrUsed=256, biClrImportant=256
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08pi256.bmp").c_str());
+
+    // g08pi64.bmp - biClrUsed=256, biClrImportant=64. It's barely possible that some
+    // sophisticated viewers may display this image in grayscale, if there are a
+    // limited number of colors available.
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08pi64.bmp").c_str());
+
+    // not supported
+    // g08rle.bmp - RLE compressed.
+
+    // g08os2.bmp - OS/2-style bitmap. This is an obsolete variety of BMP
+    // that is still encountered sometimes. It has 3-byte palette
+    // entries (instead of 4), and 16-bit width/height fields (instead of 32).
+    test_scanline_reader<gil::rgb8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08os2.bmp").c_str());
+
+    // g08res22.bmp - resolution 7874x7874 pixels/meter (200x200 dpi)
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08res22.bmp").c_str());
+
+    // g08res11.bmp - resolution 3937x3937 pixels/meter (100x100 dpi)
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08res11.bmp").c_str());
+
+    // g08res21.bmp resolution 7874x3937 pixels/meter (200x100 dpi).
+    // Some programs (e.g. Imaging for Windows) may display this image
+    // stretched vertically, which is the optimal thing to do if the
+    // program is primarily a viewer, rather than an editor.
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08res21.bmp").c_str());
+
+    // g08s0.bmp - bits size not given (set to 0). This is legal for uncompressed bitmaps.
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08s0.bmp").c_str());
+
+    // g08offs.bmp - bfOffBits in header not set to the usual value.
+    // There are 100 extra unused bytes between palette and bits.
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08offs.bmp").c_str());
+
+    // g08w126.bmp - size 126x63 (right and bottom slightly clipped)
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08w126.bmp").c_str());
+
+    // g08w125.bmp - size 125x62
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08w125.bmp").c_str());
+
+    // g08w124.bmp - size 124x61
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08w124.bmp").c_str());
+
+    // g08p64.bmp - 64-color grayscale palette
+    test_scanline_reader<gil::rgba8_image_t, gil::bmp_tag>(std::string(bmp_in + "g08p64.bmp").c_str());
+
+    // g16def555.bmp - 15-bit color (1 bit wasted), biCompression=BI_RGB (no bitfields, defaults to 5-5-5)
+    test_scanline_reader<gil::rgb8_image_t, gil::bmp_tag>(std::string(bmp_in + "g16def555.bmp").c_str());
+
+    // g16bf555.bmp - 15-bit color, biCompression=BI_BITFIELDS (bitfields indicate 5-5-5)
+    test_scanline_reader<gil::rgb8_image_t, gil::bmp_tag>(std::string(bmp_in + "g16bf555.bmp").c_str());
+
+    // g16bf565.bmp - 16-bit color, biCompression=BI_BITFIELDS (bitfields indicate 5-6-5)
+    test_scanline_reader<gil::rgb8_image_t, gil::bmp_tag>(std::string(bmp_in + "g16bf565.bmp").c_str());
+
+    // g24.bmp - 24-bit color (BGR)
+    test_scanline_reader<gil::bgr8_image_t, gil::bmp_tag>(std::string(bmp_in + "g24.bmp").c_str());
+
+    // g32def.bmp - 24-bit color (8 bits wasted), biCompression=BI_RGB (no bitfields, defaults to BGRx)
+    test_scanline_reader<gil::bgra8_image_t, gil::bmp_tag>(std::string(bmp_in + "g32def.bmp").c_str());
+
+    // g32bf.bmp - 24-bit color (8 bits wasted), biCompression=BI_BITFIELDS (bitfields indicate BGRx)
+    test_scanline_reader<gil::bgra8_image_t, gil::bmp_tag>(std::string(bmp_in + "g32bf.bmp").c_str());
+}
+
+void test_partial_image()
+{
+    std::string const filename(bmp_in + "g24.bmp");
+
+    gil::rgb8_image_t img;
+    gil::read_image(filename, img, gil::image_read_settings<gil::bmp_tag>(
+        gil::point_t(0, 0), gil::point_t(50, 50)));
+
+    write_view(bmp_out + "rgb_partial.bmp", gil::view(img), gil::bmp_tag());
+}
+#endif // BOOST_GIL_IO_USE_BMP_TEST_SUITE_IMAGES
+
+int main(int argc, char *argv[])
+{
+    try
+    {
+        test_read_header();
+
+#ifdef BOOST_GIL_IO_USE_BMP_TEST_SUITE_IMAGES
+        test_read_reference_images_test();
+        test_read_reference_images_image_iterator();
+        test_partial_image();
+#endif
+    }
+     catch (std::exception const& e)
+    {
+        BOOST_ERROR(e.what());
+    }
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/bmp/bmp_test.cpp b/src/boost/libs/gil/test/extension/io/bmp/bmp_test.cpp
new file mode 100644
index 000000000..6b1385464
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/bmp/bmp_test.cpp
@@ -0,0 +1,284 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#define BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
+#define BOOST_FILESYSTEM_VERSION 3
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/bmp.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include <fstream>
+#include <sstream>
+#include <string>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+#include "subimage_test.hpp"
+
+namespace fs = boost::filesystem;
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+void test_read_image_info_using_string()
+{
+    {
+        using backend_t = gil::get_reader_backend<std::string const, gil::bmp_tag>::type;
+        backend_t backend = read_image_info(bmp_filename, gil::bmp_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000);
+        BOOST_TEST_EQ(backend._info._height, 600);
+    }
+    {
+        std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+        using backend_t = gil::get_reader_backend<std::ifstream, gil::bmp_tag>::type;
+        backend_t backend = read_image_info(in, gil::bmp_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000);
+        BOOST_TEST_EQ(backend._info._height, 600);
+    }
+    {
+        FILE *file = fopen(bmp_filename.c_str(), "rb");
+        using backend_t = gil::get_reader_backend<FILE *, gil::bmp_tag>::type;
+        backend_t backend = read_image_info(file, gil::bmp_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000);
+        BOOST_TEST_EQ(backend._info._height, 600);
+    }
+    {
+        fs::path my_path(bmp_filename);
+        using backend_t = gil::get_reader_backend<fs::path, gil::bmp_tag>::type;
+        backend_t backend = read_image_info(my_path, gil::bmp_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000);
+        BOOST_TEST_EQ(backend._info._height, 600);
+    }
+}
+
+void test_read_image()
+{
+    {
+        gil::rgb8_image_t img;
+        read_image(bmp_filename, img, gil::bmp_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000);
+        BOOST_TEST_EQ(img.height(), 600);
+    }
+    {
+        std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img;
+        read_image(in, img, gil::bmp_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000);
+        BOOST_TEST_EQ(img.height(), 600);
+    }
+    {
+        FILE *file = fopen(bmp_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img;
+        read_image(file, img, gil::bmp_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000);
+        BOOST_TEST_EQ(img.height(), 600);
+    }
+    {
+        fs::path my_path(bmp_filename);
+
+        gil::rgb8_image_t img;
+        read_image(my_path, img, gil::bmp_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000);
+        BOOST_TEST_EQ(img.height(), 600);
+    }
+}
+
+void test_read_and_convert_image()
+{
+    {
+        gil::rgb8_image_t img;
+        read_and_convert_image(bmp_filename, img, gil::bmp_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000);
+        BOOST_TEST_EQ(img.height(), 600);
+    }
+    {
+        std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img;
+        read_and_convert_image(in, img, gil::bmp_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000);
+        BOOST_TEST_EQ(img.height(), 600);
+    }
+    {
+        FILE *file = fopen(bmp_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img;
+        read_and_convert_image(file, img, gil::bmp_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000);
+        BOOST_TEST_EQ(img.height(), 600);
+    }
+}
+
+void test_read_view()
+{
+    {
+        gil::rgb8_image_t img(1000, 600);
+        read_view(bmp_filename, gil::view(img), gil::bmp_tag());
+    }
+    {
+        std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img(1000, 600);
+        read_view(in, gil::view(img), gil::bmp_tag());
+    }
+    {
+        FILE *file = fopen(bmp_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img(1000, 600);
+        read_view(file, gil::view(img), gil::bmp_tag());
+    }
+}
+
+void test_read_and_convert_view()
+{
+    {
+        gil::rgb8_image_t img(1000, 600);
+        read_and_convert_view(bmp_filename, gil::view(img), gil::bmp_tag());
+    }
+    {
+        std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img(1000, 600);
+        read_and_convert_view(in, gil::view(img), gil::bmp_tag());
+    }
+    {
+        FILE *file = fopen(bmp_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img(1000, 600);
+        read_and_convert_view(file, gil::view(img), gil::bmp_tag());
+    }
+}
+
+void test_write_view()
+{
+    auto const b = gil::rgb8_pixel_t(0, 0, 255);
+    auto const g = gil::rgb8_pixel_t(0, 255, 0);
+    {
+        std::string filename(bmp_out + "write_test_string.bmp");
+        gil::write_view(filename, create_mandel_view(1000, 600, b, g), gil::bmp_tag());
+    }
+    {
+        std::string filename(bmp_out + "write_test_ofstream.bmp");
+        std::ofstream out(filename.c_str(), std::ios::binary);
+
+        gil::write_view(out, create_mandel_view(1000, 600, b, g), gil::bmp_tag());
+    }
+    {
+        std::string filename(bmp_out + "write_test_file.bmp");
+
+        FILE *file = fopen(filename.c_str(), "wb");
+        gil::write_view(file, create_mandel_view(1000, 600, b, g), gil::bmp_tag());
+    }
+    {
+        std::string filename(bmp_out + "write_test_info.bmp");
+
+        gil::image_write_info<gil::bmp_tag> info;
+        FILE *file = fopen(filename.c_str(), "wb");
+        gil::write_view(file, create_mandel_view(1000, 600, b, g), info);
+    }
+}
+
+void test_stream()
+{
+    // 1. Read an image.
+    std::ifstream in(bmp_filename.c_str(), std::ios::binary);
+
+    gil::rgb8_image_t img;
+    gil::read_image(in, img, gil::bmp_tag());
+
+    // 2. Write image to in-memory buffer.
+    std::stringstream out_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    gil::write_view(out_buffer, gil::view(img), gil::bmp_tag());
+
+    // 3. Copy in-memory buffer to another.
+    std::stringstream in_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    in_buffer << out_buffer.rdbuf();
+
+    // 4. Read in-memory buffer to gil image
+    gil::rgb8_image_t dst;
+    gil::read_image(in_buffer, dst, gil::bmp_tag());
+
+    // 5. Write out image.
+    std::string filename(bmp_out + "stream_test.bmp");
+    std::ofstream out(filename.c_str(), std::ios_base::binary);
+
+    gil::write_view( out, gil::view( dst ), gil::bmp_tag() );
+}
+
+void test_stream_2()
+{
+    std::filebuf in_buf;
+    if (!in_buf.open(bmp_filename.c_str(), std::ios::in | std::ios::binary))
+    {
+        BOOST_TEST(false);
+    }
+    std::istream in(&in_buf);
+
+    gil::rgb8_image_t img;
+    read_image(in, img, gil::bmp_tag());
+}
+
+void test_subimage()
+{
+    run_subimage_test<gil::rgb8_image_t, gil::bmp_tag>(
+        bmp_filename, gil::point_t(0, 0), gil::point_t(1000, 1));
+
+    run_subimage_test<gil::rgb8_image_t, gil::bmp_tag>(
+        bmp_filename, gil::point_t(39, 7), gil::point_t(50, 50));
+}
+
+void test_dynamic_image()
+{
+    using my_img_types = mp11::mp_list
+        <
+            gil::gray8_image_t,
+            gil::gray16_image_t,
+            gil::rgb8_image_t,
+            gil::rgba8_image_t
+        >;
+
+    gil::any_image<my_img_types> image;
+    gil::read_image(bmp_filename.c_str(), image, gil::bmp_tag());
+
+    gil::write_view(bmp_out + "dynamic_image_test.bmp", gil::view(image), gil::bmp_tag());
+}
+
+int main(int argc, char *argv[])
+{
+    try
+    {
+        test_read_image_info_using_string();
+        test_read_image();
+        test_read_and_convert_image();
+        test_read_view();
+        test_read_and_convert_view();
+        test_write_view();
+        test_stream();
+        test_stream_2();
+        test_subimage();
+        test_dynamic_image();
+    }
+    catch (std::exception const& e)
+    {
+        BOOST_ERROR(e.what());
+    }
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/bmp/bmp_write_test.cpp b/src/boost/libs/gil/test/extension/io/bmp/bmp_write_test.cpp
new file mode 100644
index 000000000..2dea9e514
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/bmp/bmp_write_test.cpp
@@ -0,0 +1,53 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/io/typedefs.hpp>
+#include <boost/gil/extension/io/bmp.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "cmp_view.hpp"
+#include "color_space_write_test.hpp"
+#include "mandel_view.hpp"
+#include "paths.hpp"
+
+namespace gil = boost::gil;
+
+void test_write_rgb8()
+{
+    gil::write_view(bmp_out + "rgb8_test.bmp", create_mandel_view(200, 200,
+        gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)), gil::bmp_tag());
+}
+
+void test_write_rgba8()
+{
+    gil::write_view(bmp_out + "rgba8_test.bmp", create_mandel_view(200, 200,
+        gil::rgba8_pixel_t(0, 0, 255, 0), gil::rgba8_pixel_t(0, 255, 0, 0)), gil::bmp_tag());
+}
+
+void test_rgb_color_space_write()
+{
+    color_space_write_test<gil::bmp_tag>(
+        bmp_out + "rgb_color_space_test.bmp",
+        bmp_out + "bgr_color_space_test.bmp");
+}
+
+int main(int argc, char *argv[])
+{
+    try
+    {
+        test_write_rgb8();
+        test_write_rgba8();
+        test_rgb_color_space_write();
+    }
+    catch (std::exception const& e)
+    {
+        BOOST_ERROR(e.what());
+    }
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/cmp_view.hpp b/src/boost/libs/gil/test/extension/io/cmp_view.hpp
new file mode 100644
index 000000000..9141f55d4
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/cmp_view.hpp
@@ -0,0 +1,37 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_IO_TEST_EXTENSION_IO_CMP_VIEW_HPP
+#define BOOST_GIL_IO_TEST_EXTENSION_IO_CMP_VIEW_HPP
+
+#include <boost/gil.hpp>
+
+#include <stdexcept>
+
+template <typename View1, typename View2>
+void cmp_view(View1 const& v1, View2 const& v2)
+{
+    if (v1.dimensions() != v2.dimensions())
+        throw std::runtime_error("Images are not equal.");
+
+    typename View1::x_coord_t width  = v1.width();
+    typename View1::y_coord_t height = v1.height();
+
+    for (typename View1::y_coord_t y = 0; y < height; ++y)
+    {
+        typename View1::x_iterator const src_it = v1.row_begin(y);
+        typename View2::x_iterator const dst_it = v2.row_begin(y);
+
+        for (typename View1::x_coord_t x = 0; x < width; ++x)
+        {
+            if (*src_it != *dst_it)
+                throw std::runtime_error("Images are not equal.");
+        }
+    }
+}
+
+#endif // BOOST_GIL_IO_TEST_EXTENSION_IO_CMP_VIEW_HPP
diff --git a/src/boost/libs/gil/test/extension/io/color_space_write_test.hpp b/src/boost/libs/gil/test/extension/io/color_space_write_test.hpp
new file mode 100644
index 000000000..c7fb1577b
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/color_space_write_test.hpp
@@ -0,0 +1,52 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_TEST_EXTENSION_IO_COLOR_SPACE_WRITE_TEST_HPP
+#define BOOST_GIL_TEST_EXTENSION_IO_COLOR_SPACE_WRITE_TEST_HPP
+
+#include <boost/gil.hpp>
+
+#ifndef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+#include <boost/core/ignore_unused.hpp>
+#endif
+#include <string>
+
+#include "cmp_view.hpp"
+
+template <typename Tag>
+void color_space_write_test(std::string const& file_name_1, std::string const& file_name_2)
+{
+    namespace gil = boost::gil;
+
+    gil::rgb8_image_t rgb(320, 200);
+    gil::bgr8_image_t bgr(320, 200);
+
+    gil::fill_pixels(gil::view(rgb), gil::rgb8_pixel_t(0, 0, 255));
+    gil::fill_pixels(gil::view(bgr), gil::bgr8_pixel_t(255, 0, 0));
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(file_name_1, gil::view(rgb), Tag());
+    gil::write_view(file_name_2, gil::view(bgr), Tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::rgb8_image_t rgb_1;
+    gil::rgb8_image_t rgb_2;
+
+    gil::read_image(file_name_1, rgb_1, Tag());
+    gil::read_image(file_name_2, rgb_2, Tag());
+
+    cmp_view(gil::view(rgb_1), gil::view(rgb_2));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+
+#ifndef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    boost::ignore_unused(file_name_1);
+    boost::ignore_unused(file_name_2);
+#endif
+}
+
+#endif // BOOST_GIL_TEST_EXTENSION_IO_COLOR_SPACE_WRITE_TEST_HPP
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diff --git a/src/boost/libs/gil/test/extension/io/images/bmp/readme.txt b/src/boost/libs/gil/test/extension/io/images/bmp/readme.txt
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--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/images/bmp/readme.txt
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+# Copyright (C) 2013 Christian Henning
+# Distributed under the Boost Software License, Version 1.0. 
+# See www.boost.org/LICENSE_1_0.txt
+
+Image were found at http://entropymine.com/jason/bmpsuite/ .
\ No newline at end of file
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diff --git a/src/boost/libs/gil/test/extension/io/images/png/PngSuite/readme.txt b/src/boost/libs/gil/test/extension/io/images/png/PngSuite/readme.txt
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--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/images/png/PngSuite/readme.txt
@@ -0,0 +1,7 @@
+# Copyright (C) 2013 Christian Henning
+# Distributed under the Boost Software License, Version 1.0. 
+# See www.boost.org/LICENSE_1_0.txt
+
+test images can be found at http://www.schaik.com/pngsuite/pngsuite.html
+
+if not available please send me an email at chhenning ** at ** gmail.com
\ No newline at end of file
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+P1
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new file mode 100644
index 000000000..1673f5167
--- /dev/null
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diff --git a/src/boost/libs/gil/test/extension/io/images/pnm/p3.pnm b/src/boost/libs/gil/test/extension/io/images/pnm/p3.pnm
new file mode 100644
index 000000000..5c2320cd6
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/images/pnm/p3.pnm
@@ -0,0 +1,16388 @@
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diff --git a/src/boost/libs/gil/test/extension/io/images/pnm/p5.pnm b/src/boost/libs/gil/test/extension/io/images/pnm/p5.pnm
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diff --git a/src/boost/libs/gil/test/extension/io/images/pnm/p6.pnm b/src/boost/libs/gil/test/extension/io/images/pnm/p6.pnm
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index 000000000..bf4a94710
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diff --git a/src/boost/libs/gil/test/extension/io/images/pnm/readme.txt b/src/boost/libs/gil/test/extension/io/images/pnm/readme.txt
new file mode 100644
index 000000000..7a9ab2cb7
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/images/pnm/readme.txt
@@ -0,0 +1,5 @@
+# Copyright (C) 2013 Christian Henning
+# Distributed under the Boost Software License, Version 1.0. 
+# See www.boost.org/LICENSE_1_0.txt
+
+Please send me an email to retrieve the test files at chhenning **at** gmail.com.
\ No newline at end of file
diff --git a/src/boost/libs/gil/test/extension/io/images/pnm/rgb.pnm b/src/boost/libs/gil/test/extension/io/images/pnm/rgb.pnm
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diff --git a/src/boost/libs/gil/test/extension/io/images/raw/RAW_CANON_D30_SRGB.CRW b/src/boost/libs/gil/test/extension/io/images/raw/RAW_CANON_D30_SRGB.CRW
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diff --git a/src/boost/libs/gil/test/extension/io/images/raw/readme.txt b/src/boost/libs/gil/test/extension/io/images/raw/readme.txt
new file mode 100644
index 000000000..7436b5493
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/images/raw/readme.txt
@@ -0,0 +1,5 @@
+# Copyright (C) 2013 Christian Henning
+# Distributed under the Boost Software License, Version 1.0. 
+# See www.boost.org/LICENSE_1_0.txt
+
+Images are taken from http://www.rawsamples.ch/index_en.php
\ No newline at end of file
diff --git a/src/boost/libs/gil/test/extension/io/images/readme.md b/src/boost/libs/gil/test/extension/io/images/readme.md
new file mode 100644
index 000000000..cefddf5b3
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/images/readme.md
@@ -0,0 +1,3 @@
+For copyright reasons the complete is available here:
+
+https://github.com/chhenning/gil_io_images
\ No newline at end of file
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diff --git a/src/boost/libs/gil/test/extension/io/images/targa/fileformat_info/readme.txt b/src/boost/libs/gil/test/extension/io/images/targa/fileformat_info/readme.txt
new file mode 100644
index 000000000..b4ec88cb3
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/images/targa/fileformat_info/readme.txt
@@ -0,0 +1,5 @@
+# Copyright (C) 2013 Christian Henning
+# Distributed under the Boost Software License, Version 1.0. 
+# See www.boost.org/LICENSE_1_0.txt
+
+taken from http://www.fileformat.info/format/tga/sample/index.htm
diff --git a/src/boost/libs/gil/test/extension/io/images/tiff/graphicmagick/readme.txt b/src/boost/libs/gil/test/extension/io/images/tiff/graphicmagick/readme.txt
new file mode 100644
index 000000000..9d49c13c4
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/images/tiff/graphicmagick/readme.txt
@@ -0,0 +1,7 @@
+# Copyright (C) 2013 Christian Henning
+# Distributed under the Boost Software License, Version 1.0. 
+# See www.boost.org/LICENSE_1_0.txt
+
+files can be found at ftp://ftp.graphicsmagick.org/pub/tiff-samples/
+
+if not available please ask me at chhenning **at** gmail.com
\ No newline at end of file
diff --git a/src/boost/libs/gil/test/extension/io/images/tiff/libtiffpic/readme.txt b/src/boost/libs/gil/test/extension/io/images/tiff/libtiffpic/readme.txt
new file mode 100644
index 000000000..9bc367e69
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/images/tiff/libtiffpic/readme.txt
@@ -0,0 +1,7 @@
+# Copyright (C) 2013 Christian Henning
+# Distributed under the Boost Software License, Version 1.0. 
+# See www.boost.org/LICENSE_1_0.txt
+
+taken from http://www.remotesensing.org/libtiff/images.html
+
+if not available please ask me at chhenning **at** gmail.com
\ No newline at end of file
diff --git a/src/boost/libs/gil/test/extension/io/images/tiff/test.tif b/src/boost/libs/gil/test/extension/io/images/tiff/test.tif
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diff --git a/src/boost/libs/gil/test/extension/io/jpeg/Jamfile b/src/boost/libs/gil/test/extension/io/jpeg/Jamfile
new file mode 100644
index 000000000..50590fbde
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/jpeg/Jamfile
@@ -0,0 +1,29 @@
+# Boost.GIL (Generic Image Library) - IO tests
+#
+# Copyright (c) 2012 Christian Henning
+# Copyright (c) 2017 Stefan Seefeld
+# Copyright (c) 2012-2020 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import ac ;
+import testing ;
+
+using libjpeg : : : : true ; # work around bug on master
+
+project
+   : requirements
+      <define>BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+      <define>BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+      <library>/boost/filesystem//boost_filesystem
+      [ ac.check-library /libjpeg//libjpeg : <library>/libjpeg//libjpeg : <build>no ]
+   ;
+
+
+run jpeg_test.cpp ;
+run jpeg_read_test.cpp ;
+run jpeg_write_test.cpp  ;
+
+run jpeg_old_test.cpp ;
diff --git a/src/boost/libs/gil/test/extension/io/jpeg/jpeg_old_test.cpp b/src/boost/libs/gil/test/extension/io/jpeg/jpeg_old_test.cpp
new file mode 100644
index 000000000..241b51bc6
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/jpeg/jpeg_old_test.cpp
@@ -0,0 +1,101 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/jpeg/old.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+void test_old_read_dimensions()
+{
+    gil::point_t dim = gil::jpeg_read_dimensions(jpeg_filename);
+    BOOST_TEST_EQ(dim.x, 1000);
+    BOOST_TEST_EQ(dim.y, 600);
+}
+
+void test_old_read_image()
+{
+    gil::rgb8_image_t img;
+    gil::jpeg_read_image(jpeg_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 1000);
+    BOOST_TEST_EQ(img.height(), 600);
+}
+
+void test_old_read_and_convert_image()
+{
+    gil::rgb8_image_t img;
+    gil::jpeg_read_and_convert_image(jpeg_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 1000);
+    BOOST_TEST_EQ(img.height(), 600);
+}
+
+void test_old_read_view()
+{
+    gil::rgb8_image_t img(1000, 600);
+    gil::jpeg_read_view(jpeg_filename, gil::view(img));
+}
+
+void test_old_read_and_convert_view()
+{
+    gil::rgb8_image_t img(1000, 600);
+    gil::jpeg_read_and_convert_view(jpeg_filename, gil::view(img));
+}
+
+void test_old_write_view()
+{
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    auto b = gil::rgb8_pixel_t(0, 0, 255);
+    auto g = gil::rgb8_pixel_t(0, 255, 0);
+    gil::jpeg_write_view(jpeg_out + "old_write_test.jpg", create_mandel_view(320, 240, b, g));
+#endif // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_old_dynamic_image()
+{
+    using my_img_types = mp11::mp_list
+        <
+            gil::gray8_image_t,
+            gil::gray16_image_t,
+            gil::rgb8_image_t,
+            gil::rgba8_image_t
+        >;
+
+    gil::any_image<my_img_types> image;
+    gil::jpeg_read_image(jpeg_filename.c_str(), image);
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::jpeg_write_view(jpeg_out + "old_dynamic_image_test.jpg", gil::view(image));
+#endif // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_old_read_dimensions();
+    test_old_read_image();
+    test_old_read_and_convert_image();
+    test_old_read_view();
+    test_old_read_and_convert_view();
+    test_old_write_view();
+    test_old_dynamic_image();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/jpeg/jpeg_read_test.cpp b/src/boost/libs/gil/test/extension/io/jpeg/jpeg_read_test.cpp
new file mode 100644
index 000000000..c63621148
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/jpeg/jpeg_read_test.cpp
@@ -0,0 +1,106 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/jpeg.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "paths.hpp"
+#include "scanline_read_test.hpp"
+
+#include <cmath>
+#include <sstream>
+#include <string>
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+void test_read_header()
+{
+    using backend_t = gil::get_reader_backend<std::string const, gil::jpeg_tag>::type;
+    backend_t backend = gil::read_image_info(jpeg_filename, gil::jpeg_tag());
+
+    BOOST_TEST_EQ(backend._info._width, 1000u);
+    BOOST_TEST_EQ(backend._info._height, 600u);
+
+    BOOST_TEST_EQ(backend._info._num_components, 3);
+    BOOST_TEST_EQ(backend._info._color_space, JCS_YCbCr);
+
+    BOOST_TEST_EQ(backend._info._data_precision, 8);
+}
+
+void test_read_pixel_density()
+{
+    using backend_t = gil::get_reader_backend<std::string const, gil::jpeg_tag>::type;
+    backend_t backend = gil::read_image_info(jpeg_in + "EddDawson/36dpi.jpg", gil::jpeg_tag());
+
+    gil::rgb8_image_t img;
+    gil::read_image(jpeg_in + "EddDawson/36dpi.jpg", img, gil::jpeg_tag());
+
+    gil::image_write_info<gil::jpeg_tag> write_settings;
+    write_settings.set_pixel_dimensions(backend._info._width, backend._info._height, backend._info._pixel_width_mm, backend._info._pixel_height_mm);
+
+    std::stringstream in_memory(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    gil::write_view(in_memory, gil::view(img), write_settings);
+
+    using backend2_t = gil::get_reader_backend<std::stringstream, gil::jpeg_tag>::type;
+    backend2_t backend2 = gil::read_image_info(in_memory, gil::jpeg_tag());
+
+    // Because of rounding the two results differ slightly.
+    if (std::abs(backend._info._pixel_width_mm - backend2._info._pixel_width_mm) > 10.0 || std::abs(backend._info._pixel_height_mm - backend2._info._pixel_height_mm) > 10.0)
+    {
+        BOOST_TEST_EQ(0, 1);
+    }
+}
+
+void test_read_reference_images()
+{
+    using image_t = gil::rgb8_image_t;
+    image_t img;
+    read_image(jpeg_filename, img, gil::jpeg_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(jpeg_out + "rgb8_test.jpg", gil::view(img), gil::jpeg_tag());
+#endif // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_dct_method_read()
+{
+    using image_t = gil::rgb8_image_t;
+    image_t img;
+
+    gil::image_read_settings<gil::jpeg_tag> settings;
+    settings._dct_method = gil::jpeg_dct_method::fast;
+
+    gil::read_image(jpeg_filename, img, settings);
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(jpeg_out + "fast_dct_read_test.jpg", gil::view(img), gil::jpeg_tag());
+#endif // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_read_reference_images_image_iterator()
+{
+    test_scanline_reader<gil::rgb8_image_t, gil::jpeg_tag>(jpeg_filename.c_str());
+}
+
+int main()
+{
+    test_read_header();
+    test_read_pixel_density();
+    test_read_reference_images();
+    test_dct_method_read();
+    test_read_reference_images_image_iterator();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/jpeg/jpeg_test.cpp b/src/boost/libs/gil/test/extension/io/jpeg/jpeg_test.cpp
new file mode 100644
index 000000000..be7628180
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/jpeg/jpeg_test.cpp
@@ -0,0 +1,274 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#define BOOST_FILESYSTEM_VERSION 3
+#define BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/jpeg.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include <fstream>
+#include <sstream>
+#include <string>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+#include "subimage_test.hpp"
+
+namespace fs = boost::filesystem;
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+void test_read_image_info()
+{
+    {
+        using backend_t = gil::get_reader_backend<std::string const, gil::jpeg_tag>::type;
+        backend_t backend = gil::read_image_info(jpeg_filename, gil::jpeg_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000u);
+        BOOST_TEST_EQ(backend._info._height, 600u);
+    }
+    {
+        std::ifstream in(jpeg_filename.c_str(), std::ios::binary);
+
+        using backend_t = gil::get_reader_backend<std::ifstream, gil::jpeg_tag>::type;
+        backend_t backend = gil::read_image_info(in, gil::jpeg_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000u);
+        BOOST_TEST_EQ(backend._info._height, 600u);
+    }
+    {
+        FILE *file = fopen(jpeg_filename.c_str(), "rb");
+
+        using backend_t = gil::get_reader_backend<FILE *, gil::jpeg_tag>::type;
+        backend_t backend = gil::read_image_info(file, gil::jpeg_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000u);
+        BOOST_TEST_EQ(backend._info._height, 600u);
+    }
+    {
+        using backend_t = gil::get_reader_backend<fs::path, gil::jpeg_tag>::type;
+        backend_t backend = gil::read_image_info(fs::path(jpeg_filename), gil::jpeg_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000u);
+        BOOST_TEST_EQ(backend._info._height, 600u);
+    }
+}
+
+void test_read_image()
+{
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(jpeg_filename, img, gil::jpeg_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        std::ifstream in(jpeg_filename.c_str(), std::ios::binary);
+        gil::rgb8_image_t img;
+        gil::read_image(in, img, gil::jpeg_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        FILE *file = fopen(jpeg_filename.c_str(), "rb");
+        gil::rgb8_image_t img;
+        gil::read_image(file, img, gil::jpeg_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        gil::rgb8_image_t img;
+        gil::image_read_settings<gil::jpeg_tag> settings(gil::point_t(0, 0), gil::point_t(10, 10), gil::jpeg_dct_method::slow);
+        gil::read_image(jpeg_filename, img, settings);
+
+        BOOST_TEST_EQ(img.width(), 10u);
+        BOOST_TEST_EQ(img.height(), 10u);
+    }
+}
+
+void test_read_and_convert_image()
+{
+    {
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(jpeg_filename, img, gil::jpeg_tag());
+    }
+    {
+        std::ifstream in(jpeg_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(in, img, gil::jpeg_tag());
+    }
+}
+
+void test_read_view()
+{
+    {
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_view(jpeg_filename, gil::view(img), gil::jpeg_tag());
+    }
+    {
+        std::ifstream in(jpeg_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_view(in, gil::view(img), gil::jpeg_tag());
+    }
+    {
+        FILE *file = fopen(jpeg_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_view(file, gil::view(img), gil::jpeg_tag());
+    }
+}
+
+void test_read_and_convert_view()
+{
+    {
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_and_convert_view(jpeg_filename, gil::view(img), gil::jpeg_tag());
+    }
+    {
+        std::ifstream in(jpeg_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_and_convert_view(in, gil::view(img), gil::jpeg_tag());
+    }
+    {
+        FILE *file = fopen(jpeg_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_and_convert_view(file, gil::view(img), gil::jpeg_tag());
+    }
+}
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+void test_write_view()
+{
+    auto const b = gil::rgb8_pixel_t(0, 0, 255);
+    auto const g = gil::rgb8_pixel_t(0, 255, 0);
+    {
+        std::string filename(jpeg_out + "write_test_string.jpg");
+
+        gil::write_view(filename, create_mandel_view(320, 240, b, g), gil::jpeg_tag());
+    }
+    {
+        std::string filename(jpeg_out + "write_test_ofstream.jpg");
+        std::ofstream out(filename.c_str(), std::ios::binary);
+
+        gil::write_view(out, create_mandel_view(320, 240, b, g), gil::jpeg_tag());
+    }
+    {
+        std::string filename(jpeg_out + "write_test_file.jpg");
+        FILE *file = fopen(filename.c_str(), "wb");
+
+        gil::write_view(file, create_mandel_view(320, 240, b, g), gil::jpeg_tag());
+    }
+    {
+        std::string filename(jpeg_out + "write_test_info.jpg");
+        FILE *file = fopen(filename.c_str(), "wb");
+
+        gil::image_write_info<gil::jpeg_tag> info;
+        gil::write_view(file, create_mandel_view(320, 240, b, g), info);
+    }
+}
+#endif //BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+
+void test_stream()
+{
+    // 1. Read an image.
+    std::ifstream in(jpeg_filename.c_str(), std::ios::binary);
+
+    gil::rgb8_image_t img;
+    gil::read_image(in, img, gil::jpeg_tag());
+
+    // 2. Write image to in-memory buffer.
+    std::stringstream out_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    gil::write_view(out_buffer, gil::view(img), gil::jpeg_tag());
+
+    // 3. Copy in-memory buffer to another.
+    std::stringstream in_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    in_buffer << out_buffer.rdbuf();
+
+    // 4. Read in-memory buffer to gil image
+    gil::rgb8_image_t dst;
+    gil::read_image(in_buffer, dst, gil::jpeg_tag());
+
+    // 5. Write out image.
+    std::string filename(jpeg_out + "stream_test.jpg");
+    std::ofstream out(filename.c_str(), std::ios_base::binary);
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(out, gil::view(dst), gil::jpeg_tag());
+#endif // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_stream_2()
+{
+    std::filebuf in_buf;
+    if (!in_buf.open(jpeg_filename.c_str(), std::ios::in | std::ios::binary))
+    {
+        BOOST_TEST(false);
+    }
+
+    std::istream in(&in_buf);
+
+    gil::rgb8_image_t img;
+    gil::read_image(in, img, gil::jpeg_tag());
+}
+
+void test_subimage()
+{
+    run_subimage_test<gil::rgb8_image_t, gil::jpeg_tag>(jpeg_filename,
+        gil::point_t(0, 0), gil::point_t(50, 50));
+
+    run_subimage_test<gil::rgb8_image_t, gil::jpeg_tag>(jpeg_filename,
+        gil::point_t(43, 24), gil::point_t(50, 50));
+}
+
+void test_dynamic_image()
+{
+    using my_img_types = mp11::mp_list
+    <
+        gil::gray8_image_t,
+        gil::gray16_image_t,
+        gil::rgb8_image_t,
+        gil::rgba8_image_t
+    >;
+
+    gil::any_image<my_img_types> image;
+    gil::read_image(jpeg_filename.c_str(), image, gil::jpeg_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(jpeg_out + "old_dynamic_image_test.jpg", gil::view(image), gil::jpeg_tag());
+#endif // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_read_image_info();
+    test_read_image();
+    test_read_and_convert_image();
+    test_read_view();
+    test_read_and_convert_view();
+    test_write_view();
+    test_stream();
+    test_stream_2();
+    test_subimage();
+    test_dynamic_image();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/jpeg/jpeg_write_test.cpp b/src/boost/libs/gil/test/extension/io/jpeg/jpeg_write_test.cpp
new file mode 100644
index 000000000..32994dc73
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/jpeg/jpeg_write_test.cpp
@@ -0,0 +1,81 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/jpeg.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "color_space_write_test.hpp"
+#include "mandel_view.hpp"
+#include "paths.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+void test_write_gray8()
+{
+    gil::write_view(jpeg_out + "gray8_test.jpg", create_mandel_view(200, 200,
+        gil::gray8_pixel_t(0), gil::gray8_pixel_t(255)), gil::jpeg_tag());
+}
+
+void test_write_rgb8()
+{
+    gil::write_view(jpeg_out + "rgb8_test.jpg", create_mandel_view(200, 200,
+        gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)), gil::jpeg_tag());
+}
+
+void test_write_cmyk8()
+{
+    gil::write_view(jpeg_out + "cmyk8_test.jpg", create_mandel_view(200, 200,
+        gil::cmyk8_pixel_t(0, 0, 255, 127), gil::cmyk8_pixel_t(0, 255, 0, 127)), gil::jpeg_tag());
+}
+#endif // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+void test_dct_method_write_test()
+{
+    using image_t = gil::rgb8_image_t;
+    image_t img;
+
+    gil::read_image(jpeg_filename, img, gil::jpeg_tag());
+    gil::image_write_info<gil::jpeg_tag> info;
+    info._dct_method = gil::jpeg_dct_method::fast;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(jpeg_out + "fast_dct_write_test.jpg", gil::view(img), info);
+#endif // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+void test_rgb_color_space_write_test()
+{
+    color_space_write_test<gil::jpeg_tag>(
+        jpeg_out + "rgb_color_space_test.jpg",
+        jpeg_out + "bgr_color_space_test.jpg");
+}
+
+int main()
+{
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    test_write_gray8();
+    test_write_rgb8();
+    test_write_cmyk8();
+#endif
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+    test_dct_method_write_test();
+#endif
+
+    test_rgb_color_space_write_test();
+
+    return boost::report_errors();
+}
+
+
diff --git a/src/boost/libs/gil/test/extension/io/mandel_view.hpp b/src/boost/libs/gil/test/extension/io/mandel_view.hpp
new file mode 100644
index 000000000..e2477f416
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/mandel_view.hpp
@@ -0,0 +1,103 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_TEST_EXTENSION_IO_MANDEL_VIEW_HPP
+#define BOOST_GIL_TEST_EXTENSION_IO_MANDEL_VIEW_HPP
+
+#include <boost/gil.hpp>
+
+#include <cmath>
+#include <cstdint>
+
+namespace gil = boost::gil;
+
+// Models a Unary Function
+template <typename P>  // Models PixelValueConcept
+struct mandelbrot_fn
+{
+    using point_t                    = gil::point_t;
+    using const_t                    = mandelbrot_fn;
+    using value_type                 = P;
+    using reference                  = value_type;
+    using const_reference            = value_type;
+    using argument_type              = point_t;
+    using result_type                = reference;
+    static constexpr bool is_mutable = false;
+
+    value_type in_color_;
+    value_type out_color_;
+    point_t img_size_;
+    static const int MAX_ITER = 100;  // max number of iterations
+
+    mandelbrot_fn() = default;
+    mandelbrot_fn(gil::point_t const& sz, value_type const& in_color, value_type const& out_color)
+        : in_color_(in_color), out_color_(out_color), img_size_(sz)
+    {
+    }
+
+    std::ptrdiff_t width()
+    {
+        return img_size_.x;
+    }
+    std::ptrdiff_t height()
+    {
+        return img_size_.y;
+    }
+
+    result_type operator()(gil::point_t const& p) const
+    {
+        // normalize the coords to (-2..1, -1.5..1.5)
+        // (actually make y -1.0..2 so it is asymmetric, so we can verify some view factory methods)
+        gil::point<double> const n{
+            static_cast<double>(p.x) / static_cast<double>(img_size_.x) * 3 - 2,
+            static_cast<double>(p.y) / static_cast<double>(img_size_.y) * 3 - 1.0f};  //1.5f}
+        double t = get_num_iter(n);
+        t        = std::pow(t, 0.2);
+
+        value_type ret;
+        for (std::size_t k = 0; k < gil::num_channels<P>::value; ++k)
+            ret[k] =
+                (typename gil::channel_type<P>::type)(in_color_[k] * t + out_color_[k] * (1 - t));
+        return ret;
+    }
+
+    private:
+    double get_num_iter(boost::gil::point<double> const& p) const
+    {
+        gil::point<double> z(0, 0);
+        for (int i = 0; i < MAX_ITER; ++i)
+        {
+            z = gil::point<double>(z.x * z.x - z.y * z.y + p.x, 2 * z.x * z.y + p.y);
+            if (z.x * z.x + z.y * z.y > 4)
+                return i / (double)MAX_ITER;
+        }
+        return 0;
+    }
+};
+
+template <typename Pixel>
+struct mandel_view
+{
+    using deref_t        = mandelbrot_fn<Pixel>;
+    using locator_t      = gil::virtual_2d_locator<deref_t, false>;
+    using my_virt_view_t = gil::image_view<locator_t>;
+    using type           = my_virt_view_t;
+};
+
+template <typename Pixel>
+auto create_mandel_view(unsigned int width, unsigned int height, Pixel const& in, Pixel const& out)
+    -> typename mandel_view<Pixel>::type
+{
+    using view_t    = typename mandel_view<Pixel>::type;
+    using deref_t   = typename mandel_view<Pixel>::deref_t;
+    using locator_t = typename mandel_view<Pixel>::locator_t;
+
+    gil::point_t dims(width, height);
+    return view_t(dims, locator_t(gil::point_t(0, 0), gil::point_t(1, 1), deref_t(dims, in, out)));
+}
+
+#endif // BOOST_GIL_TEST_EXTENSION_IO_MANDEL_VIEW_HPP
diff --git a/src/boost/libs/gil/test/extension/io/paths.hpp b/src/boost/libs/gil/test/extension/io/paths.hpp
new file mode 100644
index 000000000..9726afccc
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/paths.hpp
@@ -0,0 +1,69 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_TEST_EXTENSION_IO_PATHS_HPP
+#define BOOST_GIL_TEST_EXTENSION_IO_PATHS_HPP
+
+// Disable warning: conversion to 'std::atomic<int>::__integral_type {aka int}' from 'long int' may alter its value
+#if defined(BOOST_CLANG)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wshorten-64-to-32"
+#endif
+
+#if defined(BOOST_GCC) && (BOOST_GCC >= 40900)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wconversion"
+#endif
+
+#define BOOST_FILESYSTEM_VERSION 3
+#include <boost/filesystem.hpp>
+
+#if defined(BOOST_CLANG)
+#pragma clang diagnostic pop
+#endif
+
+#if defined(BOOST_GCC) && (BOOST_GCC >= 40900)
+#pragma GCC diagnostic pop
+#endif
+
+#include <string>
+
+// `base` holds the path to ../.., i.e. the directory containing `images`
+static const std::string base =
+    (boost::filesystem::absolute(boost::filesystem::path(__FILE__)).parent_path().string()) + "/";
+
+static const std::string bmp_in  = base + "images/bmp/";
+static const std::string bmp_out = base + "output/";
+
+static const std::string jpeg_in  = base + "images/jpeg/";
+static const std::string jpeg_out = base + "output/";
+
+static const std::string png_base_in = base + "images/png/";
+static const std::string png_in      = png_base_in + "PngSuite/";
+static const std::string png_out     = base + "output/";
+
+static const std::string pnm_in  = base + "images/pnm/";
+static const std::string pnm_out = base + "output/";
+
+static const std::string raw_in = base + "images/raw/";
+
+static const std::string targa_in  = base + "images/targa/";
+static const std::string targa_out = base + "output/";
+
+static const std::string tiff_in    = base + "images/tiff/";
+static const std::string tiff_out   = base + "output/";
+static const std::string tiff_in_GM = tiff_in + "graphicmagick/";
+
+static const std::string bmp_filename(bmp_in + "test.bmp");
+static const std::string jpeg_filename(jpeg_in + "test.jpg");
+static const std::string png_filename(png_base_in + "test.png");
+static const std::string pnm_filename(pnm_in + "rgb.pnm");
+static const std::string raw_filename(raw_in + "RAW_CANON_D30_SRGB.CRW");
+static const std::string targa_filename(targa_in + "24BPP_compressed.tga");
+static const std::string tiff_filename(tiff_in + "test.tif");
+
+#endif // BOOST_GIL_TEST_EXTENSION_IO_PATHS_HPP
diff --git a/src/boost/libs/gil/test/extension/io/png/Jamfile b/src/boost/libs/gil/test/extension/io/png/Jamfile
new file mode 100644
index 000000000..a7e8fbdb9
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/png/Jamfile
@@ -0,0 +1,32 @@
+# Boost.GIL (Generic Image Library) - IO tests
+#
+# Copyright (c) 2012 Christian Henning
+# Copyright (c) 2017 Stefan Seefeld
+# Copyright (c) 2012-2020 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import ac ;
+import testing ;
+
+using zlib ;
+using libpng : : : : true ;
+
+# TODO: Download PNG test suite images and build with BOOST_GIL_IO_USE_PNG_FILEFORMAT_TEST_SUITE_IMAGES
+
+project
+   : requirements
+      <define>BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+      <define>BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+      <library>/boost/filesystem//boost_filesystem
+      [ ac.check-library /zlib//zlib : <library>/zlib//zlib : <build>no ]
+      [ ac.check-library /libpng//libpng : <library>/libpng//libpng : <build>no ]
+   ;
+
+run png_test.cpp ;
+run png_file_format_test.cpp ;
+run png_read_test.cpp ;
+
+run png_old_test.cpp ;
diff --git a/src/boost/libs/gil/test/extension/io/png/png_file_format_test.cpp b/src/boost/libs/gil/test/extension/io/png/png_file_format_test.cpp
new file mode 100644
index 000000000..cda7fffde
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/png/png_file_format_test.cpp
@@ -0,0 +1,71 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#define BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
+#define BOOST_GIL_IO_ENABLE_GRAY_ALPHA
+#define BOOST_FILESYSTEM_VERSION 3
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/png.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "paths.hpp"
+
+namespace gil = boost::gil;
+namespace fs = boost::filesystem;
+
+#ifdef BOOST_GIL_IO_USE_PNG_TEST_SUITE_IMAGES
+
+// Test will loop through the "in" folder to read and convert
+// the png's to rgb8_image_t's. Which then will be written in
+// the "out" folder.
+//
+// The file name structure is as followed:
+//
+// g04i2c08.png
+// || |||+---- bit-depth
+// || ||+----- color-type (descriptive)
+// || |+------ color-type (numerical)
+// || +------- interlaced or non-interlaced
+// |+--------- parameter of test (in this case gamma-value)
+// +---------- test feature (in this case gamma)
+
+void test_file_format()
+{
+    std::string in(png_in + "PngSuite\\");
+    fs::path in_path = fs::system_complete(fs::path(in));
+
+    if (fs::is_directory(in_path))
+    {
+        fs::directory_iterator end_iter;
+        for (fs::directory_iterator dir_itr(in_path); dir_itr != end_iter; ++dir_itr)
+        {
+            if (fs::is_regular(dir_itr->status()) && (fs::extension(dir_itr->path()) == ".PNG"))
+            {
+                gil::rgb8_image_t img;
+                std::string filename = in + dir_itr->path().leaf().string();
+                gil::read_and_convert_image(filename, img, gil::png_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+                gil::write_view(png_out + fs::basename(dir_itr->path()) + ".png",
+                    gil::view(img), gil::png_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+            }
+        }
+    }
+}
+
+int main()
+{
+    test_file_format();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_PNG_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/png/png_old_test.cpp b/src/boost/libs/gil/test/extension/io/png/png_old_test.cpp
new file mode 100644
index 000000000..869f749e0
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/png/png_old_test.cpp
@@ -0,0 +1,101 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/png/old.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+void test_old_read_dimensions()
+{
+    gil::point_t dim = gil::png_read_dimensions(png_filename);
+    BOOST_TEST_EQ(dim.x, 1000);
+    BOOST_TEST_EQ(dim.y, 600);
+}
+
+void test_old_read_image()
+{
+    gil::rgba8_image_t img;
+    gil::png_read_image(png_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 1000);
+    BOOST_TEST_EQ(img.height(), 600);
+}
+
+void test_old_read_and_convert_image()
+{
+    gil::rgb8_image_t img;
+    gil::png_read_and_convert_image(png_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 1000);
+    BOOST_TEST_EQ(img.height(), 600);
+}
+
+void test_old_read_view()
+{
+    gil::rgba8_image_t img(1000, 600);
+    gil::png_read_view(png_filename, view(img));
+}
+
+void test_old_read_and_convert_view()
+{
+    gil::rgb8_image_t img(1000, 600);
+    gil::png_read_and_convert_view(png_filename, view(img));
+}
+
+void test_old_write_view()
+{
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::png_write_view(
+        png_out + "old_write_view_test.png",
+        create_mandel_view(320, 240, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_old_dynamic_image()
+{
+    using my_img_types = mp11::mp_list
+    <
+        gil::gray8_image_t,
+        gil::gray16_image_t,
+        gil::rgb8_image_t,
+        gil::rgba8_image_t
+    >;
+    gil::any_image<my_img_types> image;
+
+    gil::png_read_image(png_filename.c_str(), image);
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::png_write_view(png_out + "old_dynamic_image_test.png", gil::view(image));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_old_read_dimensions();
+    test_old_read_image();
+    test_old_read_and_convert_image();
+    test_old_read_view();
+    test_old_read_and_convert_view();
+    test_old_write_view();
+    test_old_dynamic_image();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/png/png_read_test.cpp b/src/boost/libs/gil/test/extension/io/png/png_read_test.cpp
new file mode 100644
index 000000000..5b51cf548
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/png/png_read_test.cpp
@@ -0,0 +1,764 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#define BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
+#define BOOST_GIL_IO_ENABLE_GRAY_ALPHA
+#define BOOST_FILESYSTEM_VERSION 3
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/png.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+#include <iostream>
+#include <sstream>
+#include <string>
+
+#include "paths.hpp"
+#include "scanline_read_test.hpp"
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+namespace fs = boost::filesystem;
+
+using gray_alpha8_pixel_t = gil::pixel<std::uint8_t, gil::gray_alpha_layout_t>;
+using gray_alpha8c_pixel_t = gil::pixel<std::uint8_t, gil::gray_alpha_layout_t> const;
+using gray_alpha8_image_t= gil::image<gray_alpha8_pixel_t, false>;
+
+using gray_alpha16_pixel_t = gil::pixel<std::uint16_t, gil::gray_alpha_layout_t>;
+using gray_alpha16c_pixel_t = gil::pixel<std::uint16_t, gil::gray_alpha_layout_t> const;
+using gray_alpha16_image_t = gil::image<gray_alpha16_pixel_t, false>;
+
+template <typename Image>
+void test_file(std::string filename)
+{
+    Image src, dst;
+
+    gil::image_read_settings<gil::png_tag> settings;
+    settings._read_file_gamma        = true;
+    settings._read_transparency_data = true;
+
+    using backend_t   = gil::get_reader_backend<std::string const, gil::png_tag>::type;
+    backend_t backend = gil::read_image_info(png_in + filename, settings);
+
+    gil::read_image(png_in + filename, src, settings);
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::image_write_info<gil::png_tag> write_info;
+    write_info._file_gamma = backend._info._file_gamma;
+
+    gil::write_view(png_out + filename, view(src), write_info);
+    gil::read_image(png_out + filename, dst, settings);
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(src), gil::const_view(dst)));
+#endif // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+template <typename Image>
+void test_png_scanline_reader(std::string filename)
+{
+    test_scanline_reader<Image, gil::png_tag>(std::string(png_in + filename).c_str());
+}
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+void test_read_header()
+{
+    using backend_t = gil::get_reader_backend<std::string const, gil::png_tag>::type;
+    backend_t backend = gil::read_image_info(png_filename, gil::png_tag());
+
+    BOOST_TEST_EQ(backend._info._width, 1000u);
+    BOOST_TEST_EQ(backend._info._height, 600u);
+
+    BOOST_TEST_EQ(backend._info._num_channels, 4);
+    BOOST_TEST_EQ(backend._info._bit_depth, 8);
+    BOOST_TEST_EQ(backend._info._color_type, PNG_COLOR_TYPE_RGBA);
+
+    BOOST_TEST_EQ(backend._info._interlace_method, PNG_INTERLACE_NONE);
+    BOOST_TEST_EQ(backend._info._compression_method, PNG_COMPRESSION_TYPE_BASE);
+    BOOST_TEST_EQ(backend._info._filter_method, PNG_FILTER_TYPE_BASE);
+
+    BOOST_TEST_EQ(backend._info._file_gamma, 1);
+}
+
+void test_read_pixel_per_meter()
+{
+    gil::image_read_settings<gil::png_tag> settings;
+    settings.set_read_members_true();
+
+    using backend_t = gil::get_reader_backend<std::string const, gil::png_tag>::type;
+    backend_t backend = gil::read_image_info(png_base_in + "EddDawson/36dpi.png", settings);
+
+    BOOST_TEST_EQ(backend._info._pixels_per_meter, png_uint_32(1417));
+}
+
+void test_read_with_trns_chunk_color_type_0()
+{
+    // PNG 1.2: For color type 0 (grayscale), the tRNS chunk contains a single gray level value,
+    // stored in the format:
+    //
+    // Gray:  2 bytes, range 0 .. (2^bitdepth)-1
+    {
+        auto const png_path = png_in + "tbbn0g04.png";
+        gil::image_read_settings<gil::png_tag> settings;
+        settings.set_read_members_true();
+        auto backend = gil::read_image_info(png_path, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(backend._info._bit_depth, 4);
+        BOOST_TEST_EQ(backend._info._num_channels, 1u);
+        BOOST_TEST_EQ(backend._info._color_type, PNG_COLOR_TYPE_GRAY);
+
+        gray_alpha8_image_t img;
+        read_image(png_path, img, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(const_view(img).front(), gray_alpha8c_pixel_t(255, 0));
+        BOOST_TEST_EQ(const_view(img)[78], gray_alpha8c_pixel_t(221, 255));
+        BOOST_TEST_EQ(const_view(img)[79], gray_alpha8c_pixel_t(204, 255));
+        BOOST_TEST_EQ(const_view(img)[975], gray_alpha8c_pixel_t(238, 255));
+        BOOST_TEST_EQ(const_view(img)[976], gray_alpha8c_pixel_t(221, 255));
+        BOOST_TEST_EQ(const_view(img).back(), gray_alpha8c_pixel_t(255, 0));
+    }
+    {
+        auto const png_path = png_in + "tbwn0g16.png";
+        gil::image_read_settings<gil::png_tag> settings;
+        settings.set_read_members_true();
+        auto backend = gil::read_image_info(png_path, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(backend._info._bit_depth, 16);
+        BOOST_TEST_EQ(backend._info._num_channels, 1u);
+        BOOST_TEST_EQ(backend._info._color_type, PNG_COLOR_TYPE_GRAY);
+
+        gray_alpha16_image_t img;
+        read_image(png_path, img, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(const_view(img).front(), gray_alpha16c_pixel_t(65535, 0));
+        BOOST_TEST_EQ(const_view(img)[78], gray_alpha16c_pixel_t(58339, 65535));
+        BOOST_TEST_EQ(const_view(img)[79], gray_alpha16c_pixel_t(51657, 65535));
+        BOOST_TEST_EQ(const_view(img)[975], gray_alpha16c_pixel_t(62965, 65535));
+        BOOST_TEST_EQ(const_view(img)[976], gray_alpha16c_pixel_t(58339, 65535));
+        BOOST_TEST_EQ(const_view(img).back(), gray_alpha16c_pixel_t(65535, 0));
+    }
+}
+
+void test_read_with_trns_chunk_color_type_2()
+{
+    // PNG 1.2: For color type 2 (truecolor), the tRNS chunk contains a single RGB color value,
+    // stored in the format:
+    //
+    // Red:   2 bytes, range 0 .. (2^bitdepth)-1
+    // Green: 2 bytes, range 0 .. (2^bitdepth)-1
+    // Blue:  2 bytes, range 0 .. (2^bitdepth)-1
+    {
+        auto const png_path = png_in + "tbbn2c16.png";
+        gil::image_read_settings<gil::png_tag> settings;
+        settings.set_read_members_true();
+        auto backend = gil::read_image_info(png_path, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(backend._info._bit_depth, 16);
+        BOOST_TEST_EQ(backend._info._num_channels, 3u);
+        BOOST_TEST_EQ(backend._info._color_type, PNG_COLOR_TYPE_RGB);
+
+        gil::rgba16_image_t img;
+        read_image(png_path, img, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(const_view(img).front(), gil::rgba16c_pixel_t(65535, 65535, 65535, 0));
+        BOOST_TEST_EQ(const_view(img)[78], gil::rgba16c_pixel_t(58339, 58339, 58339, 65535));
+        BOOST_TEST_EQ(const_view(img)[79], gil::rgba16c_pixel_t(51657, 51657, 51657, 65535));
+        BOOST_TEST_EQ(const_view(img)[975], gil::rgba16c_pixel_t(62965, 62965, 62965, 65535));
+        BOOST_TEST_EQ(const_view(img)[976], gil::rgba16c_pixel_t(58339, 58339, 58339, 65535));
+        BOOST_TEST_EQ(const_view(img).back(), gil::rgba16c_pixel_t(65535, 65535, 65535, 0));
+    }
+    {
+        auto const png_path = png_in + "tbgn2c16.png";
+        gil::image_read_settings<gil::png_tag> settings;
+        settings.set_read_members_true();
+        auto backend = gil::read_image_info(png_path, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(backend._info._bit_depth, 16);
+        BOOST_TEST_EQ(backend._info._num_channels, 3u);
+        BOOST_TEST_EQ(backend._info._color_type, PNG_COLOR_TYPE_RGB);
+
+        gil::rgba16_image_t img;
+        read_image(png_path, img, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(const_view(img).front(), gil::rgba16c_pixel_t(65535, 65535, 65535, 0));
+        BOOST_TEST_EQ(const_view(img)[78], gil::rgba16c_pixel_t(58339, 58339, 58339, 65535));
+        BOOST_TEST_EQ(const_view(img)[79], gil::rgba16c_pixel_t(51657, 51657, 51657, 65535));
+        BOOST_TEST_EQ(const_view(img)[975], gil::rgba16c_pixel_t(62965, 62965, 62965, 65535));
+        BOOST_TEST_EQ(const_view(img)[976], gil::rgba16c_pixel_t(58339, 58339, 58339, 65535));
+        BOOST_TEST_EQ(const_view(img).back(), gil::rgba16c_pixel_t(65535, 65535, 65535, 0));
+    }
+    {
+        auto const png_path = png_in + "tbrn2c08.png";
+        gil::image_read_settings<gil::png_tag> settings;
+        settings.set_read_members_true();
+        auto backend = gil::read_image_info(png_path, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(backend._info._bit_depth, 8);
+        BOOST_TEST_EQ(backend._info._num_channels, 3u);
+        BOOST_TEST_EQ(backend._info._color_type, PNG_COLOR_TYPE_RGB);
+
+        gil::rgba8_image_t img;
+        read_image(png_path, img, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(const_view(img).front(), gil::rgba8c_pixel_t(255, 255, 255, 0));
+        BOOST_TEST_EQ(const_view(img)[78], gil::rgba8c_pixel_t(227, 227, 227, 255));
+        BOOST_TEST_EQ(const_view(img)[79], gil::rgba8c_pixel_t(201, 201, 201, 255));
+        BOOST_TEST_EQ(const_view(img)[975], gil::rgba8c_pixel_t(245, 245, 245, 255));
+        BOOST_TEST_EQ(const_view(img)[976], gil::rgba8c_pixel_t(227, 227, 227, 255));
+        BOOST_TEST_EQ(const_view(img).back(), gil::rgba8c_pixel_t(255, 255, 255, 0));
+    }
+}
+
+void test_read_with_trns_chunk_color_type_3()
+{
+    // PNG 1.2: For color type 3 (indexed color), the tRNS chunk contains a series of one-byte
+    // alpha values, corresponding to entries in the PLTE chunk:
+    //
+    // Alpha for palette index 0:  1 byte
+    // Alpha for palette index 1:  1 byte
+    // ...etc...
+    {
+        auto const png_path = png_in + "tbbn3p08.png";
+        gil::image_read_settings<gil::png_tag> settings;
+        settings.set_read_members_true();
+        auto backend = gil::read_image_info(png_path, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(backend._info._bit_depth, 8);
+        BOOST_TEST_EQ(backend._info._num_channels, 1u);
+        BOOST_TEST_EQ(backend._info._color_type, PNG_COLOR_TYPE_PALETTE);
+
+        gil::rgba8_image_t img;
+        read_image(png_path, img, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(const_view(img).front(), gil::rgba8c_pixel_t(255, 255, 255, 0));
+        BOOST_TEST_EQ(const_view(img)[78], gil::rgba8c_pixel_t(227, 227, 227, 255));
+        BOOST_TEST_EQ(const_view(img)[79], gil::rgba8c_pixel_t(201, 201, 201, 255));
+        BOOST_TEST_EQ(const_view(img)[975], gil::rgba8c_pixel_t(246, 246, 246, 255));
+        BOOST_TEST_EQ(const_view(img)[976], gil::rgba8c_pixel_t(227, 227, 227, 255));
+        BOOST_TEST_EQ(const_view(img).back(), gil::rgba8c_pixel_t(255, 255, 255, 0));
+    }
+    {
+        auto const png_path = png_in + "tbgn3p08.png";
+        gil::image_read_settings<gil::png_tag> settings;
+        settings.set_read_members_true();
+        auto backend = gil::read_image_info(png_path, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(backend._info._bit_depth, 8);
+        BOOST_TEST_EQ(backend._info._num_channels, 1u);
+        BOOST_TEST_EQ(backend._info._color_type, PNG_COLOR_TYPE_PALETTE);
+
+        gil::rgba8_image_t img;
+        read_image(png_path, img, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(const_view(img).front(), gil::rgba8c_pixel_t(255, 255, 255, 0));
+        BOOST_TEST_EQ(const_view(img)[78], gil::rgba8c_pixel_t(227, 227, 227, 255));
+        BOOST_TEST_EQ(const_view(img)[79], gil::rgba8c_pixel_t(201, 201, 201, 255));
+        BOOST_TEST_EQ(const_view(img)[975], gil::rgba8c_pixel_t(246, 246, 246, 255));
+        BOOST_TEST_EQ(const_view(img)[976], gil::rgba8c_pixel_t(227, 227, 227, 255));
+        BOOST_TEST_EQ(const_view(img).back(), gil::rgba8c_pixel_t(255, 255, 255, 0));
+    }
+    {
+        auto const png_path = png_in + "tp1n3p08.png";
+        gil::image_read_settings<gil::png_tag> settings;
+        settings.set_read_members_true();
+        auto backend = gil::read_image_info(png_path, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(backend._info._bit_depth, 8);
+        BOOST_TEST_EQ(backend._info._num_channels, 1u);
+        BOOST_TEST_EQ(backend._info._color_type, PNG_COLOR_TYPE_PALETTE);
+
+        gil::rgba8_image_t img;
+        read_image(png_path, img, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(const_view(img).front(), gil::rgba8c_pixel_t(255, 255, 255, 0));
+        BOOST_TEST_EQ(const_view(img)[78], gil::rgba8c_pixel_t(227, 227, 227, 255));
+        BOOST_TEST_EQ(const_view(img)[79], gil::rgba8c_pixel_t(201, 201, 201, 255));
+        BOOST_TEST_EQ(const_view(img)[975], gil::rgba8c_pixel_t(246, 246, 246, 255));
+        BOOST_TEST_EQ(const_view(img)[976], gil::rgba8c_pixel_t(227, 227, 227, 255));
+        BOOST_TEST_EQ(const_view(img).back(), gil::rgba8c_pixel_t(255, 255, 255, 0));
+    }
+    {
+        auto const png_path = png_in + "tm3n3p02.png";
+        gil::image_read_settings<gil::png_tag> settings;
+        settings.set_read_members_true();
+        auto backend = gil::read_image_info(png_path, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(backend._info._bit_depth, 2);
+        BOOST_TEST_EQ(backend._info._num_channels, 1u);
+        BOOST_TEST_EQ(backend._info._color_type, PNG_COLOR_TYPE_PALETTE);
+
+        gil::rgba8_image_t img;
+        read_image(png_path, img, settings);
+        BOOST_TEST_EQ(backend._info._width, 32u);
+        BOOST_TEST_EQ(backend._info._height, 32u);
+        BOOST_TEST_EQ(const_view(img).front(), gil::rgba8c_pixel_t(0, 0, 255, 0));
+        BOOST_TEST_EQ(const_view(img)[16], gil::rgba8c_pixel_t(0, 0, 255, 85));
+        BOOST_TEST_EQ(const_view(img)[511], gil::rgba8c_pixel_t(0, 0, 255, 85));
+        BOOST_TEST_EQ(const_view(img)[1007], gil::rgba8c_pixel_t(0, 0, 255, 170));
+        BOOST_TEST_EQ(const_view(img).back(), gil::rgba8c_pixel_t(0, 0, 255, 255));
+    }
+}
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+#ifdef BOOST_GIL_IO_USE_PNG_TEST_SUITE_IMAGES
+void test_basic_format()
+{
+    // Basic format test files (non-interlaced)
+
+    // BASN0g01    -   black & white
+    test_file<gil::gray1_image_t>("BASN0G01.PNG");
+    test_png_scanline_reader<gil::gray1_image_t>("BASN0G01.PNG");
+
+    // BASN0g02    -   2 bit (4 level) grayscale
+    test_file<gil::gray2_image_t>("BASN0G02.PNG");
+    test_png_scanline_reader<gil::gray2_image_t>("BASN0G02.PNG");
+
+    // BASN0g04    -   4 bit (16 level) grayscale
+    test_file<gil::gray4_image_t>("BASN0G04.PNG");
+    test_png_scanline_reader<gil::gray4_image_t>("BASN0G04.PNG");
+
+    // BASN0g08    -   8 bit (256 level) grayscale
+    test_file<gil::gray8_image_t>("BASN0G08.PNG");
+    test_png_scanline_reader<gil::gray8_image_t>("BASN0G08.PNG");
+
+    // BASN0g16    -   16 bit (64k level) grayscale
+    test_file<gil::gray16_image_t>("BASN0G16.PNG");
+    test_png_scanline_reader<gil::gray16_image_t>("BASN0G16.PNG");
+
+    // BASN2c08    -   3x8 bits gil::rgb color
+    test_file<gil::rgb8_image_t>("BASN2C08.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("BASN2C08.PNG");
+
+    // BASN2c16    -   3x16 bits gil::rgb color
+    test_file<gil::rgb16_image_t>("BASN2C16.PNG");
+    test_png_scanline_reader<gil::rgb16_image_t>("BASN2C16.PNG");
+
+    // BASN3p01    -   1 bit (2 color) paletted
+    test_file<gil::rgb8_image_t>("BASN3P01.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("BASN3P01.PNG");
+
+    // BASN3p02    -   2 bit (4 color) paletted
+    test_file<gil::rgb8_image_t>("BASN3P02.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("BASN3P02.PNG");
+
+    // BASN3p04    -   4 bit (16 color) paletted
+    test_file<gil::rgb8_image_t>("BASN3P04.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("BASN3P04.PNG");
+
+    // BASN3p08    -   8 bit (256 color) paletted
+    test_file<gil::rgb8_image_t>("BASN3P08.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("BASN3P08.PNG");
+
+    // BASN4a08    -   8 bit grayscale + 8 bit alpha-channel
+    test_file<gil::gray_alpha8_image_t>("BASN4A08.PNG");
+    test_png_scanline_reader<gil::gray_alpha8_image_t>("BASN4A08.PNG");
+
+    // BASN4a16    -   16 bit grayscale + 16 bit alpha-channel
+    test_file<gil::gray_alpha16_image_t>("BASN4A16.PNG");
+    test_png_scanline_reader<gil::gray_alpha16_image_t>("BASN4A16.PNG");
+
+    // BASN6a08    -   3x8 bits gil::rgb color + 8 bit alpha-channel
+    test_file<gil::rgba8_image_t>("BASN6A08.PNG");
+    test_png_scanline_reader<gil::rgba8_image_t>("BASN6A08.PNG");
+
+    // BASN6a16    -   3x16 bits gil::rgb color + 16 bit alpha-channel
+    test_file<gil::rgba16_image_t>("BASN6A16.PNG");
+    test_png_scanline_reader<gil::rgba16_image_t>("BASN6A16.PNG");
+}
+
+void test_basic_format_interlaced()
+{
+    // Basic format test files (Adam-7 interlaced)
+
+    // BASI0g01    -   black & white
+    test_file<gil::gray1_image_t>("BASI0G01.PNG");
+
+    // BASI0g02    -   2 bit (4 level) grayscale
+    test_file<gil::gray2_image_t>("BASI0G02.PNG");
+
+    // BASI0g04    -   4 bit (16 level) grayscale
+    test_file<gil::gray4_image_t>("BASI0G04.PNG");
+
+    // BASI0g08    -   8 bit (256 level) grayscale
+    test_file<gil::gray8_image_t>("BASI0G08.PNG");
+
+    // BASI0g16    -   16 bit (64k level) grayscale
+    test_file<gil::gray16_image_t>("BASI0G16.PNG");
+
+    // BASI2c08    -   3x8 bits gil::rgb color
+    test_file<gil::rgb8_image_t>("BASI2C08.PNG");
+
+    // BASI2c16    -   3x16 bits gil::rgb color
+    test_file<gil::rgb16_image_t>("BASI2C16.PNG");
+
+    // BASI3p01    -   1 bit (2 color) paletted
+    test_file<gil::rgb8_image_t>("BASI3P01.PNG");
+
+    // BASI3p02    -   2 bit (4 color) paletted
+    test_file<gil::rgb8_image_t>("BASI3P02.PNG");
+
+    // BASI3p04    -   4 bit (16 color) paletted
+    test_file<gil::rgb8_image_t>("BASI3P04.PNG");
+
+    // BASI3p08    -   8 bit (256 color) paletted
+    test_file<gil::rgb8_image_t>("BASI3P08.PNG");
+
+    // BASI4a08    -   8 bit grayscale + 8 bit alpha-channel
+    test_file<gil::gray_alpha8_image_t>("BASI4A08.PNG");
+
+    // BASI4a16    -   16 bit grayscale + 16 bit alpha-channel
+    test_file<gil::gray_alpha16_image_t>("BASI4A16.PNG");
+
+    // BASI6a08    -   3x8 bits gil::rgb color + 8 bit alpha-channel
+    test_file<gil::rgba8_image_t>("BASI6A08.PNG");
+
+    // BASI6a16    -   3x16 bits gil::rgb color + 16 bit alpha-channel
+    test_file<gil::rgba16_image_t>("BASI6A16.PNG");
+}
+
+void test_odd_sizes()
+{
+    // S01I3P01 - 1x1 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S01I3P01.PNG");
+
+    // S01N3P01 - 1x1 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S01N3P01.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S01N3P01.PNG");
+
+    // S02I3P01 - 2x2 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S02I3P01.PNG");
+
+    // S02N3P01 - 2x2 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S02N3P01.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S02N3P01.PNG");
+
+    // S03I3P01 - 3x3 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S03I3P01.PNG");
+
+    // S03N3P01 - 3x3 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S03N3P01.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S03N3P01.PNG");
+
+    // S04I3P01 - 4x4 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S04I3P01.PNG");
+
+    // S04N3P01 - 4x4 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S04N3P01.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S04N3P01.PNG");
+
+    // S05I3P02 - 5x5 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S05I3P02.PNG");
+
+    // S05N3P02 - 5x5 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S05N3P02.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S05N3P02.PNG");
+
+    // S06I3P02 - 6x6 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S06I3P02.PNG");
+
+    // S06N3P02 - 6x6 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S06N3P02.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S06N3P02.PNG");
+
+    // S07I3P02 - 7x7 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S07I3P02.PNG");
+
+    // S07N3P02 - 7x7 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S07N3P02.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S07N3P02.PNG");
+
+    // S08I3P02 - 8x8 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S08I3P02.PNG");
+
+    // S08N3P02 - 8x8 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S08N3P02.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S08N3P02.PNG");
+
+    // S09I3P02 - 9x9 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S09I3P02.PNG");
+
+    // S09N3P02 - 9x9 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S09N3P02.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S09N3P02.PNG");
+
+    // S32I3P04 - 32x32 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S32I3P04.PNG");
+
+    // S32N3P04 - 32x32 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S32N3P04.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S32N3P04.PNG");
+
+    // S33I3P04 - 33x33 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S33I3P04.PNG");
+
+    // S33N3P04 - 33x33 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S33N3P04.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S33N3P04.PNG");
+
+    // S34I3P04 - 34x34 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S34I3P04.PNG");
+
+    // S34N3P04 - 34x34 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S34N3P04.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S34N3P04.PNG");
+
+    // S35I3P04 - 35x35 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S35I3P04.PNG");
+
+    // S35N3P04 - 35x35 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S35N3P04.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S35N3P04.PNG");
+
+    // S36I3P04 - 36x36 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S36I3P04.PNG");
+
+    // S36N3P04 - 36x36 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S36N3P04.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S36N3P04.PNG");
+
+    // S37I3P04 - 37x37 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S37I3P04.PNG");
+
+    // S37N3P04 - 37x37 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S37N3P04.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S37N3P04.PNG");
+
+    // S38I3P04 - 38x38 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S38I3P04.PNG");
+
+    // S38N3P04 - 38x38 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S38N3P04.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S38N3P04.PNG");
+
+    // S39I3P04 - 39x39 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S39I3P04.PNG");
+
+    // S39N3P04 - 39x39 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S39N3P04.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S39N3P04.PNG");
+
+    // S40I3P04 - 40x40 paletted file, interlaced
+    test_file<gil::rgb8_image_t>("S40I3P04.PNG");
+
+    // S40N3P04 - 40x40 paletted file, no interlacing
+    test_file<gil::rgb8_image_t>("S40N3P04.PNG");
+    test_png_scanline_reader<gil::rgb8_image_t>("S40N3P04.PNG");
+}
+
+void test_background()
+{
+    // BGAI4A08 - 8 bit grayscale, alpha, no background chunk, interlaced
+    test_file<gil::gray_alpha8_image_t>("BGAI4A08.PNG");
+
+    // BGAI4A16 - 16 bit grayscale, alpha, no background chunk, interlaced
+    test_file<gil::gray_alpha16_image_t>("BGAI4A16.PNG");
+
+    // BGAN6A08 - 3x8 bits gil::rgb color, alpha, no background chunk
+    test_file<gil::rgba8_image_t>("BGAN6A08.PNG");
+
+    // BGAN6A16 - 3x16 bits gil::rgb color, alpha, no background chunk
+    test_file<gil::rgba16_image_t>("BGAN6A16.PNG");
+
+    // BGBN4A08 - 8 bit grayscale, alpha, black background chunk
+    test_file<gil::gray_alpha8_image_t>("BGBN4A08.PNG");
+
+    // BGGN4A16 - 16 bit grayscale, alpha, gray background chunk
+    test_file<gil::gray_alpha16_image_t>("BGGN4A16.PNG");
+
+    // BGWN6A08 - 3x8 bits gil::rgb color, alpha, white background chunk
+    test_file<gil::rgba8_image_t>("BGWN6A08.PNG");
+
+    // BGYN6A16 - 3x16 bits gil::rgb color, alpha, yellow background chunk
+    test_file<gil::rgba16_image_t>("BGYN6A16.PNG");
+}
+
+void test_transparency()
+{
+    // TBBN1G04 - transparent, black background chunk
+    // file missing
+    //test_file<gil::gray_alpha8_image_t>("TBBN1G04.PNG" );
+
+    // TBBN2C16 - transparent, blue background chunk
+    test_file<gil::rgba16_image_t>("TBBN2C16.PNG");
+
+    // TBBN3P08 - transparent, black background chunk
+    test_file<gil::rgba8_image_t>("TBBN3P08.PNG");
+
+    // TBGN2C16 - transparent, green background chunk
+    test_file<gil::rgba16_image_t>("TBGN2C16.PNG");
+
+    // TBGN3P08 - transparent, light-gray background chunk
+    test_file<gil::rgba8_image_t>("TBGN3P08.PNG");
+
+    // TBRN2C08 - transparent, red background chunk
+    test_file<gil::rgba8_image_t>("TBRN2C08.PNG");
+
+    // TBWN1G16 - transparent, white background chunk
+    test_file<gil::gray_alpha16_image_t>("TBWN0G16.PNG");
+
+    // TBWN3P08 - transparent, white background chunk
+    test_file<gil::rgba8_image_t>("TBWN3P08.PNG");
+
+    // TBYN3P08 - transparent, yellow background chunk
+    test_file<gil::rgba8_image_t>("TBYN3P08.PNG");
+
+    // TP0N1G08 - not transparent for reference (logo on gray)
+    test_file<gil::gray8_image_t>("TP0N0G08.PNG");
+
+    // TP0N2C08 - not transparent for reference (logo on gray)
+    test_file<gil::rgb8_image_t>("TP0N2C08.PNG");
+
+    // TP0N3P08 - not transparent for reference (logo on gray)
+    test_file<gil::rgb8_image_t>("TP0N3P08.PNG");
+
+    // TP1N3P08 - transparent, but no background chunk
+    test_file<gil::rgba8_image_t>("TP1N3P08.PNG");
+}
+
+void test_gamma()
+{
+    // G03N0G16 - grayscale, file-gamma = 0.35
+    test_file<gil::gray16_image_t>("G03N0G16.PNG");
+
+    // G03N2C08 - color, file-gamma = 0.35
+    test_file<gil::rgb8_image_t>("G03N2C08.PNG");
+
+    // G03N3P04 - paletted, file-gamma = 0.35
+    test_file<gil::rgb8_image_t>("G03N3P04.PNG");
+
+    // G04N0G16 - grayscale, file-gamma = 0.45
+    test_file<gil::gray16_image_t>("G04N0G16.PNG");
+
+    // G04N2C08 - color, file-gamma = 0.45
+    test_file<gil::rgb8_image_t>("G04N2C08.PNG");
+
+    // G04N3P04 - paletted, file-gamma = 0.45
+    test_file<gil::rgb8_image_t>("G04N3P04.PNG");
+
+    // G05N0G16 - grayscale, file-gamma = 0.55
+    test_file<gil::gray16_image_t>("G05N0G16.PNG");
+
+    // G05N2C08 - color, file-gamma = 0.55
+    test_file<gil::rgb8_image_t>("G05N2C08.PNG");
+
+    // G05N3P04 - paletted, file-gamma = 0.55
+    test_file<gil::rgb8_image_t>("G05N3P04.PNG");
+
+    // G07N0G16 - grayscale, file-gamma = 0.70
+    test_file<gil::gray16_image_t>("G07N0G16.PNG");
+
+    // G07N2C08 - color, file-gamma = 0.70
+    test_file<gil::rgb8_image_t>("G07N2C08.PNG");
+
+    // G07N3P04 - paletted, file-gamma = 0.70
+    test_file<gil::rgb8_image_t>("G07N3P04.PNG");
+
+    // G10N0G16 - grayscale, file-gamma = 1.00
+    test_file<gil::gray16_image_t>("G10N0G16.PNG");
+
+    // G10N2C08 - color, file-gamma = 1.00
+    test_file<gil::rgb8_image_t>("G10N2C08.PNG");
+
+    // G10N3P04 - paletted, file-gamma = 1.00
+    test_file<gil::rgb8_image_t>("G10N3P04.PNG");
+
+    // G25N0G16 - grayscale, file-gamma = 2.50
+    test_file<gil::gray16_image_t>("G25N0G16.PNG");
+
+    // G25N2C08 - color, file-gamma = 2.50
+    test_file<gil::rgb8_image_t>("G25N2C08.PNG");
+
+    // G25N3P04 - paletted, file-gamma = 2.50
+    test_file<gil::rgb8_image_t>("G25N3P04.PNG");
+}
+#endif // BOOST_GIL_IO_USE_PNG_TEST_SUITE_IMAGES
+
+void test_corrupted_png_read()
+{
+// taken from https://github.com/boostorg/gil/issues/401#issue-518615480
+// author: https://github.com/misos1
+
+	std::initializer_list<unsigned char> corrupt_png = {
+		0x89, 'P', 'N', 'G', 0x0D, 0x0A, 0x1A, 0x0A,
+		0x00, 0x00, 0x00, 0x0D,
+		'I', 'H', 'D', 'R',
+		0x00, 0x00, 0x04, 0x00,
+		0x00, 0x00, 0x05, 0xA9,
+		0x08, 0x02, 0x00, 0x00, 0x00,
+		0x68, 0x1B, 0xF7, 0x46,
+		0x00, 0x00, 0x00, 0x00,
+		'I', 'D', 'A', 'T',
+		0x35, 0xAF, 0x06, 0x1E,
+		0x00, 0x00, 0x00, 0x00,
+		'I', 'E', 'N', 'D',
+		0xAE, 0x42, 0x60, 0x82
+	};
+
+    std::stringstream ss(
+        std::string(corrupt_png.begin(), corrupt_png.end()),
+        std::ios_base::in | std::ios_base::binary);
+    boost::gil::rgb8_image_t img;
+
+    // TODO: Replace with BOOST_ERROR below with BOOST_TEST_THROWS
+    try
+    {
+        boost::gil::read_image(ss, img, boost::gil::png_tag{});
+    }
+    catch (std::ios_base::failure& exception)
+    {
+        // the exception message is "png is invalid: iostream error"
+        // is the error portable throughout stdlib implementations,
+        // or is it native to this one?
+        // the description passd is "png_is_invalid"
+        // the exact error message is thus not checked
+        return;
+    }
+
+    BOOST_ERROR("no exception was thrown, which is an error");
+}
+
+int main()
+{
+    test_read_header();
+    test_corrupted_png_read();
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+    test_read_pixel_per_meter();
+    test_read_with_trns_chunk_color_type_0();
+    test_read_with_trns_chunk_color_type_2();
+    test_read_with_trns_chunk_color_type_3();
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+#ifdef BOOST_GIL_IO_USE_PNG_TEST_SUITE_IMAGES
+    test_basic_format();
+    test_basic_format_interlaced();
+    test_odd_sizes();
+    test_background();
+    test_transparency();
+    test_gamma();
+#endif
+
+    return boost::report_errors();
+}
+
diff --git a/src/boost/libs/gil/test/extension/io/png/png_test.cpp b/src/boost/libs/gil/test/extension/io/png/png_test.cpp
new file mode 100644
index 000000000..937c4bbe0
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/png/png_test.cpp
@@ -0,0 +1,302 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+//#define BOOST_GIL_IO_PNG_FLOATING_POINT_SUPPORTED
+//#define BOOST_GIL_IO_PNG_FIXED_POINT_SUPPORTED
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/png.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include <fstream>
+#include <sstream>
+#include <string>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+#include "subimage_test.hpp"
+
+namespace gil  = boost::gil;
+namespace mp11 = boost::mp11;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+void test_read_image_info_using_string()
+{
+    {
+        using backend_t   = gil::get_reader_backend<std::string const, gil::png_tag>::type;
+        backend_t backend = gil::read_image_info(png_filename, gil::png_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000u);
+        BOOST_TEST_EQ(backend._info._height, 600u);
+    }
+    {
+        std::ifstream in(png_filename.c_str(), std::ios::binary);
+
+        using backend_t = gil::get_reader_backend<std::ifstream, gil::png_tag>::type;
+        backend_t backend = gil::read_image_info(in, gil::png_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000u);
+        BOOST_TEST_EQ(backend._info._height, 600u);
+    }
+    {
+        FILE* file = fopen(png_filename.c_str(), "rb");
+
+        using backend_t = gil::get_reader_backend<FILE*, gil::png_tag>::type;
+        backend_t backend = gil::read_image_info(file, gil::png_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000u);
+        BOOST_TEST_EQ(backend._info._height, 600u);
+    }
+}
+
+void test_read_image()
+{
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(png_filename, img, gil::png_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        std::ifstream in(png_filename.c_str(), std::ios::binary);
+
+        gil::rgba8_image_t img;
+        gil::read_image(in, img, gil::png_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        FILE* file = fopen(png_filename.c_str(), "rb");
+
+        gil::rgba8_image_t img;
+        gil::read_image(file, img, gil::png_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+}
+
+void test_read_and_convert_image()
+{
+    {
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(png_filename, img, gil::png_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        gil::rgba8_image_t img;
+        gil::read_and_convert_image(png_filename, img, gil::png_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        std::ifstream in(png_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(in, img, gil::png_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        FILE* file = fopen(png_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(file, img, gil::png_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+}
+
+void test_read_view()
+{
+    {
+        gil::rgba8_image_t img(1000, 600);
+        gil::read_view(png_filename, view(img), gil::png_tag());
+    }
+    {
+        std::ifstream in(png_filename.c_str(), std::ios::binary);
+
+        gil::rgba8_image_t img(1000, 600);
+        gil::read_view(in, view(img), gil::png_tag());
+    }
+    {
+        FILE* file = fopen(png_filename.c_str(), "rb");
+
+        gil::rgba8_image_t img(1000, 600);
+        gil::read_view(file, view(img), gil::png_tag());
+    }
+}
+
+void test_read_and_convert_view()
+{
+    {
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_and_convert_view(png_filename, view(img), gil::png_tag());
+    }
+    {
+        std::ifstream in(png_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_and_convert_view(in, view(img), gil::png_tag());
+    }
+    {
+        FILE* file = fopen(png_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_and_convert_view(file, view(img), gil::png_tag());
+    }
+}
+#endif  // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+void test_write_view()
+{
+    {
+        std::string filename(png_out + "write_test_string.png");
+
+        gil::write_view(
+            filename,
+            create_mandel_view(320, 240, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)),
+            gil::png_tag());
+    }
+    {
+        std::string filename(png_out + "write_test_string_bgr.png");
+
+        gil::write_view(
+            filename,
+            create_mandel_view(320, 240, gil::bgr8_pixel_t(255, 0, 0), gil::bgr8_pixel_t(0, 255, 0)),
+            gil::png_tag());
+    }
+    {
+        std::string filename(png_out + "write_test_ofstream.png");
+        std::ofstream out(filename.c_str(), std::ios::out | std::ios::binary);
+
+        gil::write_view(
+            out,
+            create_mandel_view(320, 240, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)),
+            gil::png_tag());
+    }
+    {
+        std::string filename(png_out + "write_test_file.png");
+        FILE* file = fopen(filename.c_str(), "wb");
+
+        gil::write_view(
+            file,
+            create_mandel_view(320, 240, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)),
+            gil::png_tag());
+    }
+
+    {
+        std::string filename(png_out + "write_test_info.png");
+        FILE* file = fopen(filename.c_str(), "wb");
+
+        gil::image_write_info<gil::png_tag> info;
+        gil::write_view(
+            file,
+            create_mandel_view(320, 240, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)),
+            info);
+    }
+}
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+void test_stream()
+{
+    // 1. Read an image.
+    std::ifstream in(png_filename.c_str(), std::ios::binary);
+
+    gil::rgba8_image_t img;
+    gil::read_image(in, img, gil::png_tag());
+
+    // 2. Write image to in-memory buffer.
+    std::stringstream out_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    gil::write_view(out_buffer, view(img), gil::png_tag());
+
+    // 3. Copy in-memory buffer to another.
+    std::stringstream in_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    in_buffer << out_buffer.rdbuf();
+
+    // 4. Read in-memory buffer to gil image
+    gil::rgba8_image_t dst;
+    gil::read_image(in_buffer, dst, gil::png_tag());
+
+    // 5. Write out image.
+    std::string filename(png_out + "stream_test.png");
+    std::ofstream out(filename.c_str(), std::ios_base::binary);
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(out, view(dst), gil::png_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_stream_2()
+{
+    std::filebuf in_buf;
+    if (!in_buf.open(png_filename.c_str(), std::ios::in | std::ios::binary))
+    {
+        BOOST_TEST(false);
+    }
+    std::istream in(&in_buf);
+
+    gil::rgba8_image_t img;
+    gil::read_image(in, img, gil::png_tag());
+}
+
+void test_subimage()
+{
+    run_subimage_test<gil::rgba8_image_t, gil::png_tag>(
+        png_filename, gil::point_t(0, 0), gil::point_t(50, 50));
+
+    run_subimage_test<gil::rgba8_image_t, gil::png_tag>(
+        png_filename, gil::point_t(135, 95), gil::point_t(50, 50));
+}
+
+void test_dynamic_image()
+{
+    using my_img_types = mp11::mp_list
+    <
+        gil::gray8_image_t,
+        gil::gray16_image_t,
+        gil::rgb8_image_t,
+        gil::rgba8_image_t
+    >;
+    gil::any_image<my_img_types> image;
+
+    gil::read_image(png_filename.c_str(), image, gil::png_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(png_out + "dynamic_image_test.png", gil::view(image), gil::png_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_read_image_info_using_string();
+    test_read_image();
+    test_read_and_convert_image();
+    test_read_view();
+    test_read_and_convert_view();
+    test_write_view();
+    test_stream();
+    test_stream_2();
+    test_subimage();
+    test_dynamic_image();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/png/png_write_test.cpp b/src/boost/libs/gil/test/extension/io/png/png_write_test.cpp
new file mode 100644
index 000000000..85f1541af
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/png/png_write_test.cpp
@@ -0,0 +1,33 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#define BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
+#define BOOST_GIL_IO_ENABLE_GRAY_ALPHA
+#define BOOST_FILESYSTEM_VERSION 3
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/png.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "color_space_write_test.hpp"
+#include "paths.hpp"
+#include "scanline_read_test.hpp"
+
+namespace gil = boost::gil;
+
+void test_rgb_color_space_write()
+{
+    color_space_write_test<gil::png_tag>(
+        png_out + "rgb_color_space_test.png", png_out + "bgr_color_space_test.png");
+}
+
+int main()
+{
+    test_rgb_color_space_write();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/pnm/Jamfile b/src/boost/libs/gil/test/extension/io/pnm/Jamfile
new file mode 100644
index 000000000..ab8d62441
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/pnm/Jamfile
@@ -0,0 +1,26 @@
+# Boost.GIL (Generic Image Library) - IO tests
+#
+# Copyright (c) 2012 Christian Henning
+# Copyright (c) 2017 Stefan Seefeld
+# Copyright (c) 2012-2020 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+# TODO: Download PNM test suite images and build with BOOST_GIL_IO_USE_PNM_TEST_SUITE_IMAGES
+
+project
+   : requirements
+      <define>BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+      <define>BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+      <library>/boost/filesystem//boost_filesystem
+   ;
+
+run pnm_test.cpp ;
+run pnm_read_test.cpp ;
+run pnm_write_test.cpp ;
+
+run pnm_old_test.cpp ;
diff --git a/src/boost/libs/gil/test/extension/io/pnm/pnm_old_test.cpp b/src/boost/libs/gil/test/extension/io/pnm/pnm_old_test.cpp
new file mode 100644
index 000000000..21e07fe3e
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/pnm/pnm_old_test.cpp
@@ -0,0 +1,96 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/pnm/old.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include "paths.hpp"
+
+namespace gil  = boost::gil;
+namespace mp11 = boost::mp11;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+void test_old_read_dimensions()
+{
+    boost::gil::point_t dim = gil::pnm_read_dimensions(pnm_filename);
+    BOOST_TEST_EQ(dim.x, 256);
+    BOOST_TEST_EQ(dim.y, 256);
+}
+
+void test_old_read_image()
+{
+    gil::rgb8_image_t img;
+    gil::pnm_read_image(pnm_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 256);
+    BOOST_TEST_EQ(img.height(), 256);
+}
+
+void test_old_read_and_convert_image()
+{
+    gil::rgb8_image_t img;
+    gil::pnm_read_and_convert_image(pnm_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 256);
+    BOOST_TEST_EQ(img.height(), 256);
+}
+
+void test_old_read_view()
+{
+    gil::rgb8_image_t img(256, 256);
+    gil::pnm_read_view(pnm_filename, gil::view(img));
+}
+
+void test_old_read_and_convert_view()
+{
+    gil::rgb8_image_t img(256, 256);
+    gil::pnm_read_and_convert_view(pnm_filename, gil::view(img));
+}
+
+void test_old_write_view()
+{
+    std::string filename(pnm_out + "test5.pnm");
+    gil::gray8_image_t img(256, 256);
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::pnm_write_view(filename, gil::view(img));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_old_dynamic_image()
+{
+    using my_img_types =
+        mp11::mp_list<gil::gray8_image_t, gil::gray16_image_t, gil::rgb8_image_t, gil::gray1_image_t>;
+
+    gil::any_image<my_img_types> image;
+
+    gil::pnm_read_image(pnm_filename.c_str(), image);
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::pnm_write_view(pnm_out + "old_dynamic_image_test.pnm", gil::view(image));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_old_read_dimensions();
+    test_old_read_image();
+    test_old_read_and_convert_image();
+    test_old_read_view();
+    test_old_read_and_convert_view();
+    test_old_write_view();
+    test_old_dynamic_image();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif  // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/pnm/pnm_read_test.cpp b/src/boost/libs/gil/test/extension/io/pnm/pnm_read_test.cpp
new file mode 100644
index 000000000..6f90a29ce
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/pnm/pnm_read_test.cpp
@@ -0,0 +1,124 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/pnm.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "paths.hpp"
+#include "scanline_read_test.hpp"
+
+namespace gil = boost::gil;
+
+template <typename Image>
+void write(Image& img, std::string const& file_name)
+{
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(pnm_out + file_name, gil::view(img), gil::pnm_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+template <typename Image>
+void test_pnm_scanline_reader(std::string filename)
+{
+    test_scanline_reader<Image, gil::pnm_tag>(std::string(pnm_in + filename).c_str());
+}
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+void test_read_header()
+{
+    using backend_t   = gil::get_reader_backend<std::string const, gil::pnm_tag>::type;
+    backend_t backend = gil::read_image_info(pnm_filename, gil::pnm_tag());
+
+    BOOST_TEST_EQ(backend._info._type, gil::pnm_image_type::color_bin_t::value);
+    BOOST_TEST_EQ(backend._info._width, 256u);
+    BOOST_TEST_EQ(backend._info._height, 256u);
+    BOOST_TEST_EQ(backend._info._max_value, 255u);
+}
+
+#ifdef BOOST_GIL_IO_USE_PNM_TEST_SUITE_IMAGES
+void test_read_reference_images()
+{
+    // p1.pnm
+    {
+        gil::gray8_image_t img;
+        gil::read_image(pnm_in + "p1.pnm", img, gil::pnm_tag());
+        BOOST_TEST_EQ(view(img).width(), 200u);
+        BOOST_TEST_EQ(view(img).height(), 200u);
+
+        write(img, "p1.pnm");
+        test_pnm_scanline_reader<gil::gray8_image_t>("p1.pnm");
+    }
+    // p2.pnm
+    {
+        gil::gray8_image_t img;
+        gil::read_image(pnm_in + "p2.pnm", img, gil::pnm_tag());
+        BOOST_TEST_EQ(view(img).width(), 200u);
+        BOOST_TEST_EQ(view(img).height(), 200u);
+
+        write(img, "p2.pnm");
+        test_pnm_scanline_reader<gil::gray8_image_t>("p2.pnm");
+    }
+    // p3.pnm
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(pnm_in + "p3.pnm", img, gil::pnm_tag());
+        BOOST_TEST_EQ(view(img).width(), 256u);
+        BOOST_TEST_EQ(view(img).height(), 256u);
+
+        write(img, "p3.pnm");
+        test_pnm_scanline_reader<rgb8_image_t>("p3.pnm");
+    }
+    // p4.pnm
+    {
+        gil::gray1_image_t img;
+        gil::read_image(pnm_in + "p4.pnm", img, gil::pnm_tag());
+        BOOST_TEST_EQ(view(img).width(), 200u);
+        BOOST_TEST_EQ(view(img).height(), 200u);
+
+        write(img, "p4.pnm");
+        test_pnm_scanline_reader<gil::gray1_image_t>("p4.pnm");
+    }
+    // p5.pnm
+    {
+        gil::gray8_image_t img;
+        gil::read_image(pnm_in + "p5.pnm", img, gil::pnm_tag());
+        BOOST_TEST_EQ(view(img).width(), 200u);
+        BOOST_TEST_EQ(view(img).height(), 200u);
+
+        write(img, "p5.pnm");
+        test_pnm_scanline_reader<gil::gray8_image_t>("p5.pnm");
+    }
+    // p6.pnm
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(pnm_in + "p6.pnm", img, gil::pnm_tag());
+        BOOST_TEST_EQ(view(img).width(), 256u);
+        BOOST_TEST_EQ(view(img).height(), 256u);
+
+        write(img, "p6.pnm");
+        test_pnm_scanline_reader<gil::rgb8_image_t>("p6.pnm");
+    }
+}
+#endif // BOOST_GIL_IO_USE_PNM_TEST_SUITE_IMAGES
+
+int main()
+{
+    test_read_header();
+
+#ifdef BOOST_GIL_IO_USE_PNM_TEST_SUITE_IMAGES
+    test_read_reference_images();
+#endif
+
+    return boost::report_errors();
+}
+#else
+int main() {}
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/pnm/pnm_test.cpp b/src/boost/libs/gil/test/extension/io/pnm/pnm_test.cpp
new file mode 100644
index 000000000..2e398343e
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/pnm/pnm_test.cpp
@@ -0,0 +1,240 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/pnm.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include <fstream>
+#include <sstream>
+#include <string>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+#include "subimage_test.hpp"
+
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+void test_read_image_info_using_string()
+{
+    {
+        using backend_t   = gil::get_reader_backend<std::string const, gil::pnm_tag>::type;
+        backend_t backend = gil::read_image_info(pnm_filename, gil::pnm_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 256u);
+        BOOST_TEST_EQ(backend._info._height, 256u);
+    }
+    {
+        std::ifstream in(pnm_filename.c_str(), std::ios::binary);
+
+        using backend_t   = gil::get_reader_backend<std::ifstream, gil::pnm_tag>::type;
+        backend_t backend = gil::read_image_info(in, gil::pnm_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 256u);
+        BOOST_TEST_EQ(backend._info._height, 256u);
+    }
+    {
+        FILE* file = fopen(pnm_filename.c_str(), "rb");
+
+        using backend_t   = gil::get_reader_backend<FILE*, gil::pnm_tag>::type;
+        backend_t backend = gil::read_image_info(file, gil::pnm_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 256u);
+        BOOST_TEST_EQ(backend._info._height, 256u);
+    }
+}
+
+void test_read_image()
+{
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(pnm_filename, img, gil::pnm_tag());
+
+        BOOST_TEST_EQ(img.width(), 256u);
+        BOOST_TEST_EQ(img.height(), 256u);
+    }
+    {
+        std::ifstream in(pnm_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img;
+        gil::read_image(in, img, gil::pnm_tag());
+
+        BOOST_TEST_EQ(img.width(), 256u);
+        BOOST_TEST_EQ(img.height(), 256u);
+    }
+    {
+        FILE* file = fopen(pnm_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img;
+        gil::read_image(file, img, gil::pnm_tag());
+
+        BOOST_TEST_EQ(img.width(), 256u);
+        BOOST_TEST_EQ(img.height(), 256u);
+    }
+}
+
+void test_read_and_convert_image()
+{
+    {
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(pnm_filename, img, gil::pnm_tag());
+
+        BOOST_TEST_EQ(img.width(), 256u);
+        BOOST_TEST_EQ(img.height(), 256u);
+    }
+    {
+        std::ifstream in(pnm_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(in, img, gil::pnm_tag());
+
+        BOOST_TEST_EQ(img.width(), 256u);
+        BOOST_TEST_EQ(img.height(), 256u);
+    }
+    {
+        FILE* file = fopen(pnm_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(file, img, gil::pnm_tag());
+
+        BOOST_TEST_EQ(img.width(), 256u);
+        BOOST_TEST_EQ(img.height(), 256u);
+    }
+}
+
+void test_read_view()
+{
+    {
+        gil::rgb8_image_t img(256, 256);
+        gil::read_view(pnm_filename, gil::view(img), gil::pnm_tag());
+    }
+    {
+        std::ifstream in(pnm_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img(256, 256);
+        gil::read_view(in, gil::view(img), gil::pnm_tag());
+    }
+    {
+        FILE* file = fopen(pnm_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img(256, 256);
+        gil::read_view(file, gil::view(img), gil::pnm_tag());
+    }
+}
+
+void test_read_and_convert_view()
+{
+    {
+        gil::rgb8_image_t img(256, 256);
+        gil::read_and_convert_view(pnm_filename, gil::view(img), gil::pnm_tag());
+    }
+    {
+        std::ifstream in(pnm_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img(256, 256);
+        gil::read_and_convert_view(in, gil::view(img), gil::pnm_tag());
+    }
+    {
+        FILE* file = fopen(pnm_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img(256, 256);
+
+        gil::read_and_convert_view(file, gil::view(img), gil::pnm_tag());
+    }
+}
+
+void test_stream()
+{
+    // 1. Read an image.
+    std::ifstream in(pnm_filename.c_str(), std::ios::binary);
+
+    gil::rgb8_image_t img;
+    gil::read_image(in, img, gil::pnm_tag());
+
+    // 2. Write image to in-memory buffer.
+    std::stringstream out_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    gil::write_view(out_buffer, gil::view(img), gil::pnm_tag());
+
+    // 3. Copy in-memory buffer to another.
+    std::stringstream in_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    in_buffer << out_buffer.rdbuf();
+
+    // 4. Read in-memory buffer to gil image
+    gil::rgb8_image_t dst;
+    gil::read_image(in_buffer, dst, gil::pnm_tag());
+
+    // 5. Write out image.
+    std::string filename(pnm_out + "stream_test.pnm");
+    std::ofstream out(filename.c_str(), std::ios_base::binary);
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(out, gil::view(dst), gil::pnm_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_stream_2()
+{
+    std::filebuf in_buf;
+    if (!in_buf.open(pnm_filename.c_str(), std::ios::in | std::ios::binary))
+    {
+        BOOST_TEST(false);
+    }
+
+    std::istream in(&in_buf);
+
+    gil::rgb8_image_t img;
+    gil::read_image(in, img, gil::pnm_tag());
+}
+
+void test_subimage()
+{
+    run_subimage_test<gil::rgb8_image_t, gil::pnm_tag>(
+        pnm_filename, gil::point_t(0, 0), gil::point_t(50, 50));
+
+    run_subimage_test<gil::rgb8_image_t, gil::pnm_tag>(
+        pnm_filename, gil::point_t(103, 103), gil::point_t(50, 50));
+}
+
+void test_dynamic_image_test()
+{
+    using my_img_types = mp11::mp_list
+    <
+        gil::gray8_image_t,
+        gil::gray16_image_t,
+        gil::rgb8_image_t,
+        gil::gray1_image_t
+    >;
+
+    gil::any_image<my_img_types> image;
+
+    gil::read_image(pnm_filename.c_str(), image, gil::pnm_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(pnm_out + "dynamic_image_test.pnm", gil::view(image), gil::pnm_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_read_image_info_using_string();
+    test_read_image();
+    test_read_and_convert_image();
+    test_read_view();
+    test_read_and_convert_view();
+    test_stream();
+    test_stream_2();
+    test_subimage();
+    test_dynamic_image_test();
+
+    return boost::report_errors();
+}
+#else
+int main() {}
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/pnm/pnm_write_test.cpp b/src/boost/libs/gil/test/extension/io/pnm/pnm_write_test.cpp
new file mode 100644
index 000000000..c6b166b02
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/pnm/pnm_write_test.cpp
@@ -0,0 +1,60 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/pnm.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "color_space_write_test.hpp"
+#include "mandel_view.hpp"
+#include "paths.hpp"
+
+namespace gil = boost::gil;;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+void test_write()
+{
+    mandel_view<gil::rgb8_pixel_t>::type v =
+        create_mandel_view(200, 200, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0));
+
+    // test writing all supported image types
+    {
+        using gray1_image_t = gil::bit_aligned_image1_type<1, gil::gray_layout_t>::type;
+        gray1_image_t dst(200, 200);
+        gil::copy_and_convert_pixels(v, gil::view(dst));
+
+        gil::write_view(pnm_out + "p4_write_test.pnm", gil::view(dst), gil::pnm_tag());
+    }
+    {
+        gil::gray8_image_t dst(200, 200);
+        gil::copy_and_convert_pixels(v, gil::view(dst));
+
+        gil::write_view(pnm_out + "p5_write_test.pnm", gil::view(dst), gil::pnm_tag());
+    }
+    {
+        gil::write_view(pnm_out + "p6_write_test.pnm", v, gil::pnm_tag());
+    }
+}
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+
+void test_rgb_color_space_write()
+{
+    color_space_write_test<gil::pnm_tag>(
+        pnm_out + "rgb_color_space_test.pnm", pnm_out + "bgr_color_space_test.pnm");
+}
+
+int main()
+{
+    test_rgb_color_space_write();
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    test_write();
+#endif
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/raw/Jamfile b/src/boost/libs/gil/test/extension/io/raw/Jamfile
new file mode 100644
index 000000000..c0e1a5896
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/raw/Jamfile
@@ -0,0 +1,24 @@
+# Boost.GIL (Generic Image Library) - IO tests
+#
+# Copyright (c) 2012 Christian Henning
+# Copyright (c) 2017 Stefan Seefeld
+# Copyright (c) 2012-2020 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import ac ;
+import testing ;
+
+lib libraw : : <name>raw ;
+
+project
+   : requirements
+      <define>BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+      <define>BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+      <library>/boost/filesystem//boost_filesystem
+      <library>libraw
+   ;
+
+run raw_test.cpp ;
diff --git a/src/boost/libs/gil/test/extension/io/raw/raw_test.cpp b/src/boost/libs/gil/test/extension/io/raw/raw_test.cpp
new file mode 100644
index 000000000..029eef07f
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/raw/raw_test.cpp
@@ -0,0 +1,127 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#define BOOST_FILESYSTEM_VERSION 3
+#define BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/raw.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include <fstream>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+#include "subimage_test.hpp"
+
+namespace fs = boost::filesystem;
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+void test_read_image_info_using_string()
+{
+    {
+        /// raw_tag reader's can only constructed with char*, std::string, and LibRaw object
+
+        using backend_t = gil::get_reader_backend<char const *, gil::raw_tag>::type;
+        backend_t b = gil::make_reader_backend(raw_filename.c_str(),
+            gil::image_read_settings<gil::raw_tag>());
+        backend_t backend = gil::read_image_info(raw_filename, gil::raw_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 2176);
+        BOOST_TEST_EQ(backend._info._height, 1448);
+    }
+    {
+        fs::path my_path(raw_filename);
+        using backend_t = gil::get_reader_backend<fs::path, gil::raw_tag>::type;
+        backend_t backend = gil::read_image_info(my_path, gil::raw_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 2176);
+        BOOST_TEST_EQ(backend._info._height, 1448);
+    }
+}
+
+void test_read_image()
+{
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(raw_filename, img, gil::raw_tag());
+
+        BOOST_TEST_EQ(img.width(), 2176);
+        BOOST_TEST_EQ(img.height(), 1448);
+    }
+
+    {
+        fs::path my_path(raw_filename);
+        gil::rgb8_image_t img;
+        gil::read_image(my_path, img, gil::raw_tag());
+
+        BOOST_TEST_EQ(img.width(), 2176);
+        BOOST_TEST_EQ(img.height(), 1448);
+    }
+}
+
+void test_read_and_convert_image()
+{
+    gil::rgb8_image_t img;
+    gil::read_and_convert_image(raw_filename, img, gil::raw_tag());
+
+    BOOST_TEST_EQ(img.width(), 2176);
+    BOOST_TEST_EQ(img.height(), 1448);
+}
+
+void test_read_view()
+{
+    gil::rgb8_image_t img(2176, 1448);
+    gil::read_view(raw_filename, gil::view(img), gil::raw_tag());
+}
+
+void test_read_and_convert_view()
+{
+    gil::rgb8_image_t img(2176, 1448);
+    gil::read_and_convert_view(raw_filename, gil::view(img), gil::raw_tag());
+}
+
+void test_subimage()
+{
+    run_subimage_test<gil::rgb8_image_t, gil::raw_tag>(raw_filename, gil::point_t(0, 0), gil::point_t(127, 1));
+    run_subimage_test<gil::rgb8_image_t, gil::raw_tag>(raw_filename, gil::point_t(39, 7), gil::point_t(50, 50));
+}
+
+void test_dynamic_image()
+{
+  using my_img_types = mp11::mp_list
+      <
+          gil::gray8_image_t,
+          gil::gray16_image_t,
+          gil::rgb8_image_t,
+          gil::rgba8_image_t
+      >;
+
+  gil::any_image<my_img_types> image;
+  gil::read_image(raw_filename.c_str(), image, gil::raw_tag());
+}
+
+int main()
+{
+    test_read_image_info_using_string();
+    test_read_image();
+    test_read_and_convert_image();
+    test_read_view();
+    test_read_and_convert_view();
+    //test_subimage();
+    test_dynamic_image();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/scanline_read_test.hpp b/src/boost/libs/gil/test/extension/io/scanline_read_test.hpp
new file mode 100644
index 000000000..ae10c7f10
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/scanline_read_test.hpp
@@ -0,0 +1,61 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_IO_TEST_SCANLINE_READ_TEST_HPP
+#define BOOST_GIL_IO_TEST_SCANLINE_READ_TEST_HPP
+
+#include <boost/gil.hpp>
+
+#include "cmp_view.hpp"
+
+template< typename Image
+        , typename FormatTag
+        >
+void test_scanline_reader( const char* file_name )
+{
+    using namespace boost::gil;
+
+    // read image using scanline_read_iterator
+    using reader_t = scanline_reader
+        <
+            typename get_read_device<char const*, FormatTag>::type,
+            FormatTag
+        >;
+
+    reader_t reader = make_scanline_reader( file_name, FormatTag() );
+
+    Image dst( reader._info._width, reader._info._height );
+
+    using iterator_t = typename reader_t::iterator_t;
+
+    iterator_t it  = reader.begin();
+    iterator_t end = reader.end();
+
+    for( int row = 0; it != end; ++it, ++row )
+    {
+        copy_pixels( interleaved_view( reader._info._width
+                                     , 1
+                                     , ( typename Image::view_t::x_iterator ) *it
+                                     , reader._scanline_length
+                                     )
+                   , subimage_view( view( dst )
+                                  , 0
+                                  , row
+                                  , reader._info._width
+                                  , 1
+                                  )
+                   );
+    }
+
+    //compare
+    Image img;
+    read_image( file_name, img, FormatTag() );
+
+    cmp_view( view( dst ), view( img ) );
+}
+
+#endif // BOOST_GIL_IO_TEST_SCANLINE_READ_TEST_HPP
diff --git a/src/boost/libs/gil/test/extension/io/simple_all_formats.cpp b/src/boost/libs/gil/test/extension/io/simple_all_formats.cpp
new file mode 100644
index 000000000..2acdb39fe
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/simple_all_formats.cpp
@@ -0,0 +1,94 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/extension/io/png.hpp>
+#include <boost/gil/extension/io/bmp.hpp>
+#include <boost/gil/extension/io/jpeg.hpp>
+#include <boost/gil/extension/io/pnm.hpp>
+#include <boost/gil/extension/io/targa.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "paths.hpp"
+
+namespace gil = boost::gil;
+namespace fs = boost::filesystem;
+
+// Test will include all format's headers and load and write some images.
+// This test is more of a compilation test.
+
+void test_bmp()
+{
+    gil::rgb8_image_t img;
+    gil::read_image(bmp_filename, img, gil::bmp_tag());
+
+    fs::create_directories(fs::path(bmp_out));
+    gil::write_view(bmp_out + "simple_all_format.bmp", gil::view(img), gil::bmp_tag());
+}
+
+void test_jpeg()
+{
+    gil::rgb8_image_t img;
+    gil::read_image(jpeg_filename, img, gil::jpeg_tag());
+    fs::create_directories(fs::path(jpeg_out));
+    gil::write_view(jpeg_out + "simple_all_format.jpg", gil::view(img), gil::jpeg_tag());
+}
+
+void test_png()
+{
+    gil::rgba8_image_t img;
+    gil::read_image(png_filename, img, gil::png_tag());
+    fs::create_directories(fs::path(png_out));
+    gil::write_view(png_out + "simple_all_format.png", gil::view(img), gil::png_tag());
+}
+
+void test_pnm()
+{
+    gil::rgb8_image_t img;
+    gil::read_image(pnm_filename, img, gil::pnm_tag());
+
+    fs::create_directories(fs::path(pnm_out));
+    gil::write_view(pnm_out + "simple_all_format.pnm", gil::view(img), gil::pnm_tag());
+}
+
+void test_targa()
+{
+    gil::rgb8_image_t img;
+    gil::read_image(targa_filename, img, gil::targa_tag());
+
+    fs::create_directories(fs::path(targa_out));
+    gil::write_view(targa_out + "simple_all_format.tga", gil::view(img), gil::targa_tag());
+}
+
+void test_tiff()
+{
+    gil::rgba8_image_t img;
+    gil::read_image(tiff_filename, img, gil::tiff_tag());
+
+    fs::create_directories(fs::path(tiff_out));
+    gil::write_view(tiff_out + "simple_all_format.tif", gil::view(img), gil::tiff_tag());
+}
+
+int main(int argc, char* argv[])
+{
+    try
+    {
+        test_bmp();
+        test_jpeg();
+        test_png();
+        test_pnm();
+        // TODO: test_raw()
+        test_targa();
+        test_tiff();
+    }
+    catch (std::exception const& e)
+    {
+        BOOST_ERROR(e.what());
+    }
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/subimage_test.hpp b/src/boost/libs/gil/test/extension/io/subimage_test.hpp
new file mode 100644
index 000000000..1b320b2a7
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/subimage_test.hpp
@@ -0,0 +1,30 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_IO_TEST_SUBIMAGE_TEST_HPP
+#define BOOST_GIL_IO_TEST_SUBIMAGE_TEST_HPP
+
+#include <boost/gil.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+template <typename Image, typename Format>
+void run_subimage_test(
+    std::string const& filename, boost::gil::point_t const& top_left, boost::gil::point_t const& dimension)
+{
+    Image original, subimage;
+    boost::gil::read_image(filename, original, Format{});
+    boost::gil::image_read_settings<Format> settings(top_left, dimension);
+    boost::gil::read_image(filename, subimage, settings);
+    BOOST_TEST(boost::gil::equal_pixels(
+        boost::gil::const_view(subimage),
+        boost::gil::subimage_view(boost::gil::const_view(original), top_left, dimension)));
+}
+
+#endif // BOOST_GIL_IO_TEST_SUBIMAGE_TEST_HPP
diff --git a/src/boost/libs/gil/test/extension/io/targa/Jamfile b/src/boost/libs/gil/test/extension/io/targa/Jamfile
new file mode 100644
index 000000000..ac35f88c3
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/targa/Jamfile
@@ -0,0 +1,22 @@
+# Boost.GIL (Generic Image Library) - IO tests
+#
+# Copyright (c) 2012 Christian Henning
+# Copyright (c) 2017 Stefan Seefeld
+# Copyright (c) 2012-2020 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+project
+   : requirements
+      <library>/boost/filesystem//boost_filesystem
+   ;
+
+run targa_test.cpp ;
+run targa_read_test.cpp ;
+run targa_write_test.cpp ;
+
+run targa_old_test.cpp ;
diff --git a/src/boost/libs/gil/test/extension/io/targa/targa_old_test.cpp b/src/boost/libs/gil/test/extension/io/targa/targa_old_test.cpp
new file mode 100644
index 000000000..cfb7aa9a7
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/targa/targa_old_test.cpp
@@ -0,0 +1,92 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/targa/old.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+#include <boost/mp11.hpp>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+
+namespace gil  = boost::gil;
+namespace mp11 = boost::mp11;
+
+void test_old_read_dimensions()
+{
+    boost::gil::point_t dim = gil::targa_read_dimensions(targa_filename);
+
+    BOOST_TEST_EQ(dim.x, 124);
+    BOOST_TEST_EQ(dim.y, 124);
+}
+
+void test_old_read_image()
+{
+    gil::rgb8_image_t img;
+    gil::targa_read_image(targa_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 124);
+    BOOST_TEST_EQ(img.height(), 124);
+}
+
+void test_old_read_and_convert_image()
+{
+    gil::rgb8_image_t img;
+    gil::targa_read_and_convert_image(targa_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 124);
+    BOOST_TEST_EQ(img.height(), 124);
+}
+
+void test_old_read_view()
+{
+    gil::rgb8_image_t img(124, 124);
+    gil::targa_read_view(targa_filename, gil::view(img));
+}
+
+void test_old_read_and_convert_view()
+{
+    gil::rgb8_image_t img(124, 124);
+    gil::targa_read_and_convert_view(targa_filename, gil::view(img));
+}
+
+void test_old_write_view()
+{
+    targa_write_view(
+        targa_out + "old_write_view_test.tga",
+        create_mandel_view(124, 124, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)));
+}
+
+void test_old_dynamic_image()
+{
+    using my_img_types = mp11::mp_list
+    <
+        gil::gray8_image_t,
+        gil::gray16_image_t,
+        gil::rgb8_image_t,
+        gil::rgba8_image_t
+    >;
+
+    gil::any_image<my_img_types> image;
+    gil::targa_read_image(targa_filename.c_str(), image);
+
+    targa_write_view(targa_out + "old_dynamic_image_test.tga", gil::view(image));
+}
+
+int main()
+{
+    test_old_read_dimensions();
+    test_old_read_image();
+    test_old_read_and_convert_image();
+    test_old_read_view();
+    test_old_read_and_convert_view();
+    test_old_write_view();
+    test_old_dynamic_image();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/targa/targa_read_test.cpp b/src/boost/libs/gil/test/extension/io/targa/targa_read_test.cpp
new file mode 100644
index 000000000..c585271b4
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/targa/targa_read_test.cpp
@@ -0,0 +1,213 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/targa.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "paths.hpp"
+#include "scanline_read_test.hpp"
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+template <typename Image>
+void test_targa_scanline_reader(std::string filename)
+{
+    test_scanline_reader<Image, gil::targa_tag>(std::string(targa_in + filename).c_str());
+}
+
+template <typename Image>
+void write(Image& img, std::string const& file_name)
+{
+    gil::write_view(targa_out + file_name, gil::view(img), gil::targa_tag());
+}
+
+void test_read_header()
+{
+    using backend_t   = gil::get_reader_backend<std::string const, gil::targa_tag>::type;
+    backend_t backend = gil::read_image_info(targa_filename, gil::targa_tag());
+
+    BOOST_TEST_EQ(backend._info._header_size, 18);
+    BOOST_TEST_EQ(backend._info._offset, 18);
+    BOOST_TEST_EQ(backend._info._color_map_type, 0);
+    BOOST_TEST_EQ(backend._info._image_type, 10);
+    BOOST_TEST_EQ(backend._info._color_map_start, 0);
+    BOOST_TEST_EQ(backend._info._color_map_length, 0);
+    BOOST_TEST_EQ(backend._info._color_map_depth, 0);
+    BOOST_TEST_EQ(backend._info._x_origin, 0);
+    BOOST_TEST_EQ(backend._info._y_origin, 0);
+    BOOST_TEST_EQ(backend._info._width, 124);
+    BOOST_TEST_EQ(backend._info._height, 124);
+    BOOST_TEST_EQ(backend._info._bits_per_pixel, 24);
+    BOOST_TEST_EQ(backend._info._descriptor, 0);
+}
+
+void test_read_reference_images()
+{
+    // 24BPP_compressed.tga
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(targa_in + "24BPP_compressed.tga", img, gil::targa_tag());
+
+        typename gil::rgb8_image_t::x_coord_t width  = gil::view(img).width();
+        typename gil::rgb8_image_t::y_coord_t height = gil::view(img).height();
+
+        BOOST_TEST_EQ(width, 124);
+        BOOST_TEST_EQ(height, 124);
+        BOOST_TEST_EQ(gil::view(img)(0, 0), gil::rgb8_pixel_t(248, 0, 248));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, 0), gil::rgb8_pixel_t(0, 0, 248));
+        BOOST_TEST_EQ(gil::view(img)(0, height - 1), gil::rgb8_pixel_t(248, 0, 0));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, height - 1), gil::rgb8_pixel_t(248, 0, 248));
+
+        write(img, "24BPP_compressed_out.tga");
+    }
+    // 24BPP_uncompressed.tga
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(targa_in + "24BPP_uncompressed.tga", img, gil::targa_tag());
+
+        typename gil::rgb8_image_t::x_coord_t width  = gil::view(img).width();
+        typename gil::rgb8_image_t::y_coord_t height = gil::view(img).height();
+
+        BOOST_TEST_EQ(width, 124);
+        BOOST_TEST_EQ(height, 124);
+        BOOST_TEST_EQ(gil::view(img)(0, 0), gil::rgb8_pixel_t(248, 0, 248));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, 0), gil::rgb8_pixel_t(0, 0, 248));
+        BOOST_TEST_EQ(gil::view(img)(0, height - 1), gil::rgb8_pixel_t(248, 0, 0));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, height - 1), gil::rgb8_pixel_t(248, 0, 248));
+
+        write(img, "24BPP_uncompressed_out.tga");
+
+        test_targa_scanline_reader<gil::bgr8_image_t>("24BPP_uncompressed.tga");
+    }
+    // 32BPP_compressed.tga
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(targa_in + "32BPP_compressed.tga", img, gil::targa_tag());
+
+        typename gil::rgba8_image_t::x_coord_t width  = gil::view(img).width();
+        typename gil::rgba8_image_t::y_coord_t height = gil::view(img).height();
+
+        BOOST_TEST_EQ(width, 124);
+        BOOST_TEST_EQ(height, 124);
+        BOOST_TEST_EQ(gil::view(img)(0, 0), gil::rgba8_pixel_t(248, 0, 248, 255));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, 0), gil::rgba8_pixel_t(0, 0, 248, 255));
+        BOOST_TEST_EQ(gil::view(img)(0, height - 1), gil::rgba8_pixel_t(0, 0, 0, 0));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, height - 1), gil::rgba8_pixel_t(248, 0, 248, 255));
+
+        write(img, "32BPP_compressed_out.tga");
+    }
+    // 32BPP_uncompressed.tga
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(targa_in + "32BPP_uncompressed.tga", img, gil::targa_tag());
+
+        typename gil::rgba8_image_t::x_coord_t width  = gil::view(img).width();
+        typename gil::rgba8_image_t::y_coord_t height = gil::view(img).height();
+
+        BOOST_TEST_EQ(width, 124);
+        BOOST_TEST_EQ(height, 124);
+        BOOST_TEST_EQ(gil::view(img)(0, 0), gil::rgba8_pixel_t(248, 0, 248, 255));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, 0), gil::rgba8_pixel_t(0, 0, 248, 255));
+        BOOST_TEST_EQ(gil::view(img)(0, height - 1), gil::rgba8_pixel_t(0, 0, 0, 0));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, height - 1), gil::rgba8_pixel_t(248, 0, 248, 255));
+
+        write(img, "32BPP_uncompressed_out.tga");
+
+        test_targa_scanline_reader<gil::bgra8_image_t>("32BPP_uncompressed.tga");
+    }
+    // 24BPP_compressed_ul_origin.tga
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(targa_in + "24BPP_compressed_ul_origin.tga", img, gil::targa_tag());
+
+        typename gil::rgb8_image_t::x_coord_t width  = gil::view(img).width();
+        typename gil::rgb8_image_t::y_coord_t height = gil::view(img).height();
+
+        BOOST_TEST_EQ(width, 124);
+        BOOST_TEST_EQ(height, 124);
+        BOOST_TEST_EQ(gil::view(img)(0, 0), gil::rgb8_pixel_t(248, 0, 248));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, 0), gil::rgb8_pixel_t(0, 0, 248));
+        BOOST_TEST_EQ(gil::view(img)(0, height - 1), gil::rgb8_pixel_t(248, 0, 0));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, height - 1), gil::rgb8_pixel_t(248, 0, 248));
+
+        write(img, "24BPP_compressed_ul_origin_out.tga");
+    }
+    // 24BPP_uncompressed_ul_origin.tga
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(targa_in + "24BPP_uncompressed_ul_origin.tga", img, gil::targa_tag());
+
+        typename gil::rgb8_image_t::x_coord_t width  = gil::view(img).width();
+        typename gil::rgb8_image_t::y_coord_t height = gil::view(img).height();
+
+        BOOST_TEST_EQ(width, 124);
+        BOOST_TEST_EQ(height, 124);
+        BOOST_TEST_EQ(gil::view(img)(0, 0), gil::rgb8_pixel_t(248, 0, 248));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, 0), gil::rgb8_pixel_t(0, 0, 248));
+        BOOST_TEST_EQ(gil::view(img)(0, height - 1), gil::rgb8_pixel_t(248, 0, 0));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, height - 1), gil::rgb8_pixel_t(248, 0, 248));
+
+        write(img, "24BPP_uncompressed_ul_origin_out.tga");
+    }
+    // 32BPP_compressed_ul_origin.tga
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(targa_in + "32BPP_compressed_ul_origin.tga", img, gil::targa_tag());
+
+        typename gil::rgba8_image_t::x_coord_t width  = gil::view(img).width();
+        typename gil::rgba8_image_t::y_coord_t height = gil::view(img).height();
+
+        BOOST_TEST_EQ(width, 124);
+        BOOST_TEST_EQ(height, 124);
+        BOOST_TEST_EQ(gil::view(img)(0, 0), gil::rgba8_pixel_t(248, 0, 248, 255));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, 0), gil::rgba8_pixel_t(0, 0, 248, 255));
+        BOOST_TEST_EQ(gil::view(img)(0, height - 1), gil::rgba8_pixel_t(0, 0, 0, 0));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, height - 1), gil::rgba8_pixel_t(248, 0, 248, 255));
+
+        write(img, "32BPP_compressed_ul_origin_out.tga");
+    }
+    // 32BPP_uncompressed_ul_origin.tga
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(targa_in + "32BPP_uncompressed_ul_origin.tga", img, gil::targa_tag());
+
+        typename gil::rgba8_image_t::x_coord_t width  = gil::view(img).width();
+        typename gil::rgba8_image_t::y_coord_t height = gil::view(img).height();
+
+        BOOST_TEST_EQ(width, 124);
+        BOOST_TEST_EQ(height, 124);
+        BOOST_TEST_EQ(gil::view(img)(0, 0), gil::rgba8_pixel_t(248, 0, 248, 255));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, 0), gil::rgba8_pixel_t(0, 0, 248, 255));
+        BOOST_TEST_EQ(gil::view(img)(0, height - 1), gil::rgba8_pixel_t(0, 0, 0, 0));
+        BOOST_TEST_EQ(gil::view(img)(width - 1, height - 1), gil::rgba8_pixel_t(248, 0, 248, 255));
+
+        write(img, "32BPP_uncompressed_ul_origin_out.tga");
+    }
+}
+
+void test_partial_image()
+{
+    std::string const filename(targa_in + "24BPP_compressed.tga");
+
+    gil::rgb8_image_t img;
+    gil::read_image(
+        filename, img,
+        gil::image_read_settings<gil::targa_tag>(gil::point_t(0, 0), gil::point_t(50, 50)));
+
+    gil::write_view(targa_out + "targa_partial.tga", gil::view(img), gil::targa_tag());
+}
+
+int main()
+{
+    test_read_header();
+    test_read_reference_images();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/targa/targa_test.cpp b/src/boost/libs/gil/test/extension/io/targa/targa_test.cpp
new file mode 100644
index 000000000..bb1d98935
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/targa/targa_test.cpp
@@ -0,0 +1,283 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#define BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/targa.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include <fstream>
+#include <sstream>
+#include <string>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+#include "subimage_test.hpp"
+#include "test_utility_output_stream.hpp"
+
+namespace fs = boost::filesystem;
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+void test_read_image_info_using_string()
+{
+    {
+        using backend_t   = gil::get_reader_backend<std::string const, gil::targa_tag>::type;
+        backend_t backend = gil::read_image_info(targa_filename, gil::targa_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 124);
+        BOOST_TEST_EQ(backend._info._height, 124);
+    }
+    {
+        std::ifstream in(targa_filename.c_str(), std::ios::binary);
+
+        using backend_t   = gil::get_reader_backend<std::ifstream, gil::targa_tag>::type;
+        backend_t backend = gil::read_image_info(in, gil::targa_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 124);
+        BOOST_TEST_EQ(backend._info._height, 124);
+    }
+    {
+        FILE* file = fopen(targa_filename.c_str(), "rb");
+
+        using backend_t   = gil::get_reader_backend<FILE*, gil::targa_tag>::type;
+        backend_t backend = gil::read_image_info(file, gil::targa_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 124);
+        BOOST_TEST_EQ(backend._info._height, 124);
+    }
+    {
+        fs::path my_path(targa_filename);
+
+        using backend_t   = gil::get_reader_backend<fs::path, gil::targa_tag>::type;
+        backend_t backend = gil::read_image_info(my_path, gil::targa_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 124);
+        BOOST_TEST_EQ(backend._info._height, 124);
+    }
+}
+
+void test_read_image()
+{
+    {
+        gil::rgb8_image_t img;
+        gil::read_image(targa_filename, img, gil::targa_tag());
+
+        BOOST_TEST_EQ(img.width(), 124);
+        BOOST_TEST_EQ(img.height(), 124);
+    }
+    {
+        std::ifstream in(targa_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img;
+        gil::read_image(in, img, gil::targa_tag());
+
+        BOOST_TEST_EQ(img.width(), 124);
+        BOOST_TEST_EQ(img.height(), 124);
+    }
+    {
+        FILE* file = fopen(targa_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img;
+        gil::read_image(file, img, gil::targa_tag());
+
+        BOOST_TEST_EQ(img.width(), 124);
+        BOOST_TEST_EQ(img.height(), 124);
+    }
+}
+
+void test_read_and_convert_image()
+{
+    {
+        gil::rgb8_image_t img;
+        read_and_convert_image(targa_filename, img, gil::targa_tag());
+
+        BOOST_TEST_EQ(img.width(), 124);
+        BOOST_TEST_EQ(img.height(), 124);
+    }
+    {
+        std::ifstream in(targa_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(in, img, gil::targa_tag());
+
+        BOOST_TEST_EQ(img.width(), 124);
+        BOOST_TEST_EQ(img.height(), 124);
+    }
+    {
+        FILE* file = fopen(targa_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(file, img, gil::targa_tag());
+
+        BOOST_TEST_EQ(img.width(), 124);
+        BOOST_TEST_EQ(img.height(), 124);
+    }
+}
+
+void test_read_view()
+{
+    {
+        gil::rgb8_image_t img(124, 124);
+        gil::read_view(targa_filename, gil::view(img), gil::targa_tag());
+    }
+    {
+        std::ifstream in(targa_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img(124, 124);
+        gil::read_view(in, gil::view(img), gil::targa_tag());
+    }
+    {
+        FILE* file = fopen(targa_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img(124, 124);
+        gil::read_view(file, gil::view(img), gil::targa_tag());
+    }
+}
+
+void test_read_and_convert_view()
+{
+    {
+        gil::rgb8_image_t img(124, 124);
+        gil::read_and_convert_view(targa_filename, gil::view(img), gil::targa_tag());
+    }
+    {
+        std::ifstream in(targa_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img(124, 124);
+        gil::read_and_convert_view(in, gil::view(img), gil::targa_tag());
+    }
+    {
+        FILE* file = fopen(targa_filename.c_str(), "rb");
+
+        gil::rgb8_image_t img(124, 124);
+        gil::read_and_convert_view(file, gil::view(img), gil::targa_tag());
+    }
+}
+
+void test_write_view()
+{
+    {
+        std::string filename(png_out + "write_test_string.tga");
+
+        gil::rgb8_image_t img;
+        gil::write_view(
+            filename,
+            create_mandel_view(124, 124, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)),
+            gil::targa_tag());
+    }
+    {
+        std::string filename(targa_out + "write_test_ofstream.tga");
+        std::ofstream out(filename.c_str(), std::ios::out | std::ios::binary);
+
+        gil::write_view(
+            out,
+            create_mandel_view(124, 124, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)),
+            gil::targa_tag());
+    }
+    {
+        std::string filename(targa_out + "write_test_file.tga");
+        FILE* file = fopen(filename.c_str(), "wb");
+
+        gil::write_view(
+            file,
+            create_mandel_view(124, 124, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)),
+            gil::targa_tag());
+    }
+    {
+        std::string filename(targa_out + "write_test_info.tga");
+        FILE* file = fopen(filename.c_str(), "wb");
+
+        gil::image_write_info<gil::targa_tag> info;
+        gil::write_view(
+            file,
+            create_mandel_view(124, 124, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)),
+            info);
+    }
+}
+
+void test_stream()
+{
+    // 1. Read an image.
+    std::ifstream in(targa_filename.c_str(), std::ios::binary);
+
+    gil::rgb8_image_t img;
+    gil::read_image(in, img, gil::targa_tag());
+
+    // 2. Write image to in-memory buffer.
+    std::stringstream out_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    gil::write_view(out_buffer, gil::view(img), gil::targa_tag());
+
+    // 3. Copy in-memory buffer to another.
+    std::stringstream in_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    in_buffer << out_buffer.rdbuf();
+
+    // 4. Read in-memory buffer to gil image
+    gil::rgb8_image_t dst;
+    gil::read_image(in_buffer, dst, gil::targa_tag());
+
+    // 5. Write out image.
+    std::string filename(targa_out + "stream_test.tga");
+    std::ofstream out(filename.c_str(), std::ios_base::binary);
+    gil::write_view(out, gil::view(dst), gil::targa_tag());
+}
+
+void test_stream_2()
+{
+    std::filebuf in_buf;
+    if (!in_buf.open(targa_filename.c_str(), std::ios::in | std::ios::binary))
+    {
+        BOOST_TEST(false);
+    }
+
+    std::istream in(&in_buf);
+
+    gil::rgb8_image_t img;
+    gil::read_image(in, img, gil::targa_tag());
+}
+
+void test_subimage()
+{
+    run_subimage_test<gil::rgb8_image_t, gil::targa_tag>(
+        targa_filename, gil::point_t(0, 0), gil::point_t(50, 50));
+
+    // FIXME: not working
+    // run_subimage_test<gil::gray8_image_t, gil::targa_tag>(
+    //     targa_filename, gil::point_t(39, 7), gil::point_t(50, 50));
+}
+
+void test_dynamic_image()
+{
+    using my_img_types = mp11::mp_list
+    <
+        gil::gray8_image_t,
+        gil::gray16_image_t,
+        gil::rgb8_image_t,
+        gil::rgba8_image_t
+    >;
+
+    gil::any_image<my_img_types> image;
+    gil::read_image(targa_filename.c_str(), image, gil::targa_tag());
+    gil::write_view(targa_out + "dynamic_image_test.tga", gil::view(image), gil::targa_tag());
+}
+
+int main()
+{
+    test_read_image_info_using_string();
+    test_read_image();
+    test_read_and_convert_image();
+    test_read_view();
+    test_read_and_convert_view();
+    test_stream();
+    test_stream_2();
+    test_subimage();
+    test_dynamic_image();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/targa/targa_write_test.cpp b/src/boost/libs/gil/test/extension/io/targa/targa_write_test.cpp
new file mode 100644
index 000000000..c57ea71af
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/targa/targa_write_test.cpp
@@ -0,0 +1,50 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/io/typedefs.hpp>
+#include <boost/gil/extension/io/targa.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "color_space_write_test.hpp"
+#include "mandel_view.hpp"
+#include "paths.hpp"
+
+namespace gil = boost::gil;
+
+void test_write()
+{
+    // test writing all supported image types
+    {
+        gil::write_view(
+            targa_out + "rgb8_test.tga",
+            create_mandel_view(200, 200, gil::rgb8_pixel_t(0, 0, 255), gil::rgb8_pixel_t(0, 255, 0)),
+            gil::targa_tag());
+    }
+    {
+        gil::write_view(
+            targa_out + "rgba8_test.tga",
+            create_mandel_view(
+                200, 200, gil::rgba8_pixel_t(0, 0, 255, 0), gil::rgba8_pixel_t(0, 255, 0, 0)),
+            gil::targa_tag());
+    }
+}
+
+void test_rgb_color_space_write()
+{
+    color_space_write_test<gil::targa_tag>(
+        targa_out + "rgb_color_space_test.tga", targa_out + "bgr_color_space_test.tga");
+}
+
+int main()
+{
+    test_rgb_color_space_write();
+    test_write();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/io/tiff/Jamfile b/src/boost/libs/gil/test/extension/io/tiff/Jamfile
new file mode 100644
index 000000000..f92036797
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/Jamfile
@@ -0,0 +1,54 @@
+# Boost.GIL (Generic Image Library) - IO tests
+#
+# Copyright (c) 2012 Christian Henning
+# Copyright (c) 2017 Stefan Seefeld
+# Copyright (c) 2012-2020 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import ac ;
+import testing ;
+
+using libtiff : : : : true ;
+lib libtiffxx : : <name>tiffxx ;
+
+# TODO: Download TIFF test suite images and build with BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+project
+   : requirements
+      <define>BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+      <define>BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+      <library>/boost/filesystem//boost_filesystem
+      <library>libtiffxx
+      [ ac.check-library /libtiff//libtiff : <library>/libtiff//libtiff : <build>no ]
+   ;
+
+run  tiff_file_format_test.cpp ;
+run  tiff_subimage_test.cpp ;
+run  tiff_test.cpp ;
+run  tiff_tiled_float_test.cpp ;
+run  tiff_tiled_minisblack_test_1-10.cpp ;
+run  tiff_tiled_minisblack_test_11-20.cpp ;
+run  tiff_tiled_minisblack_test_21-31_32-64.cpp ;
+run  tiff_tiled_minisblack_write_test_1-10.cpp ;
+run  tiff_tiled_minisblack_write_test_11-20.cpp ;
+run  tiff_tiled_minisblack_write_test_21-31_32-64.cpp ;
+run  tiff_tiled_palette_test_1-8.cpp ;
+run  tiff_tiled_palette_test_8-16.cpp ;
+run  tiff_tiled_palette_write_test_1-8.cpp ;
+run  tiff_tiled_palette_write_test_8-16.cpp ;
+run  tiff_tiled_rgb_contig_test_1-10.cpp ;
+run  tiff_tiled_rgb_contig_test_11-20.cpp ;
+run  tiff_tiled_rgb_contig_test_21-31_32_64.cpp ;
+run  tiff_tiled_rgb_contig_write_test_1-10.cpp ;
+run  tiff_tiled_rgb_contig_write_test_11-20.cpp ;
+run  tiff_tiled_rgb_contig_write_test_21-31_32_64.cpp ;
+run  tiff_tiled_rgb_planar_test_1-10.cpp ;
+run  tiff_tiled_rgb_planar_test_11-20.cpp ;
+run  tiff_tiled_rgb_planar_test_21-31_32_64.cpp ;
+run  tiff_tiled_test.cpp ;
+run  tiff_write_test.cpp ;
+
+run  tiff_old_test.cpp ;
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_file_format_test.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_file_format_test.cpp
new file mode 100644
index 000000000..4264312f7
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_file_format_test.cpp
@@ -0,0 +1,637 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "paths.hpp"
+#include "scanline_read_test.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_LIBTIFF_TEST_SUITE_IMAGES
+template <typename Image>
+void test_tiff_scanline_reader(std::string filename)
+{
+    test_scanline_reader<Image, gil::tiff_tag>(filename.c_str());
+}
+
+// 73x43 2-bit minisblack gray image
+void test_two_bit_minisblack_gray_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-minisblack-02.tif");
+
+    using image_t = gil::bit_aligned_image1_type<2, gil::gray_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test4.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-minisblack-04.tif    73x43 4-bit minisblack gray image
+void test_four_bit_minisblack_gray_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-minisblack-04.tif");
+
+    using image_t = gil::bit_aligned_image1_type<4, gil::gray_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test5.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-minisblack-06.tif 73x43 6-bit minisblack gray image
+void test_six_bit_minisblack_gray_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-minisblack-06.tif");
+
+    using image_t = gil::bit_aligned_image1_type<6, gil::gray_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test6.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-minisblack-08.tif    73x43 8-bit minisblack gray image
+void test_eight_bit_minisblack_gray_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-minisblack-08.tif");
+
+    using image_t = gray8_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test7.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-minisblack-10.tif    73x43 10-bit minisblack gray image
+void test_ten_bit_minisblack_gray_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-minisblack-10.tif");
+
+    using image_t = gil::bit_aligned_image1_type<10, gil::gray_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test8.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-minisblack-12.tif    73x43 12-bit minisblack gray image
+void test_twelve_bit_minisblack_gray_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-minisblack-12.tif");
+
+        using image_t = gil::bit_aligned_image1_type<12, gil::gray_layout_t>::type;
+        image_t img;
+        gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+        gil::write_view(tiff_out + "test9.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-minisblack-14.tif    73x43 14-bit minisblack gray image
+void test_fourteen_bit_minisblack_gray_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-minisblack-14.tif");
+
+    using image_t = gil::bit_aligned_image1_type<14, gil::gray_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test10.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-minisblack-16.tif    73x43 16-bit minisblack gray image
+void test_sixteen_bit_minisblack_gray_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-minisblack-16.tif");
+
+    using image_t = gray16_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test11.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-minisblack-24.tif    73x43 24-bit minisblack gray image
+void test_twentyfour_bit_minisblack_gray_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-minisblack-24.tif");
+
+    using image_t = gil::bit_aligned_image1_type<24, gil::gray_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test12.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-minisblack-32.tif    73x43 32-bit minisblack gray image
+void test_thirtytwo_bit_minisblack_gray_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-minisblack-32.tif");
+
+    using image_t = gray32_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test13.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-palette-02.tif 73x43 4-entry colormapped image
+void test_four_entry_colormapped_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-palette-02.tif");
+
+    using image_t = gil::rgb16_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test14.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-palette-04.tif    73x43 16-entry colormapped image
+void test_sixteen_entry_colormapped_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-palette-04.tif");
+
+    using image_t = gil::rgb16_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test15.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-palette-08.tif    73x43 256-entry colormapped image
+void test_twohundred_twenty_five_entry_colormapped_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-palette-08.tif");
+
+    using image_t = gil::rgb16_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test16.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-palette-16.tif    73x43 65536-entry colormapped image
+void test_sixtyfive_thousand_entry_colormapped_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-palette-16.tif");
+
+    using image_t = gil::rgb16_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test17.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-contig-02.tif    73x43 2-bit contiguous RGB image
+void test_two_bit_contiguous_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-contig-02.tif");
+
+    using image_t = gil::bit_aligned_image3_type<2, 2, 2, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test18.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-contig-04.tif    73x43 4-bit contiguous RGB image
+void test_four_bit_contiguous_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-contig-04.tif");
+
+    using image_t = gil::bit_aligned_image3_type<4, 4, 4, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test19.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-contig-08.tif    73x43 8-bit contiguous RGB image
+void test_eight_bit_contiguous_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-contig-08.tif");
+
+    using image_t = gil::rgb8_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test20.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-contig-10.tif    73x43 10-bit contiguous RGB image
+void test_ten_bit_contiguous_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-contig-10.tif");
+
+    using image_t = gil::bit_aligned_image3_type<10, 10, 10, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test21.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-contig-12.tif    73x43 12-bit contiguous RGB image
+void test_twelve_bit_contiguous_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-contig-12.tif");
+
+    using image_t = gil::bit_aligned_image3_type<12, 12, 12, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test22.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-contig-14.tif    73x43 14-bit contiguous RGB image
+void test_fourteen_bit_contiguous_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-contig-14.tif");
+
+    using image_t = gil::bit_aligned_image3_type<14, 14, 14, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test23.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-contig-16.tif    73x43 16-bit contiguous RGB image
+void test_sixteen_bit_contiguous_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-contig-16.tif");
+
+    using image_t = gil::rgb16_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test24.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-contig-24.tif    73x43 24-bit contiguous RGB image
+void test_twenty_four_bit_contiguous_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-contig-24.tif");
+
+    using image_t = gil::bit_aligned_image3_type<24, 24, 24, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test25.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-contig-32.tif    73x43 32-bit contiguous RGB image
+void test_thirty_two_bit_contiguous_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-contig-32.tif");
+
+    using image_t = gil::rgb32_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test26.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-planar-02.tif    73x43 2-bit seperated RGB image
+void test_two_bit_seperated_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-planar-02.tif");
+
+    using image_t = gil::bit_aligned_image3_type<2, 2, 2, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test27.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-planar-04.tif    73x43 4-bit seperated RGB image
+void test_four_bit_seperated_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-planar-04.tif");
+
+    using image_t = gil::bit_aligned_image3_type<4, 4, 4, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test28.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-planar-08.tif    73x43 8-bit seperated RGB image
+void test_eight_bit_seperated_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-planar-08.tif");
+
+    using image_t = gil::rgb8_planar_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test29.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-planar-10.tif    73x43 10-bit seperated RGB image
+void test_ten_bit_seperated_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-planar-10.tif");
+
+    using image_t = gil::bit_aligned_image3_type<10, 10, 10, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test30.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-planar-12.tif    73x43 12-bit seperated RGB image
+void test_twelve_bit_seperated_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-planar-12.tif");
+
+    using image_t = gil::bit_aligned_image3_type<12, 12, 12, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test31.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-planar-14.tif    73x43 14-bit seperated RGB image
+void test_fourteen_bit_seperated_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-planar-14.tif");
+
+    using image_t = gil::bit_aligned_image3_type<14, 14, 14, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test32.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-planar-16.tif    73x43 16-bit seperated RGB image
+void test_sixteen_bit_seperated_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-planar-16.tif");
+
+    using image_t = gil::rgb16_planar_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test33.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-planar-24.tif    73x43 24-bit seperated RGB image
+void test_twenty_four_bit_seperated_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-planar-24.tif");
+
+    using image_t = gil::bit_aligned_image3_type<24, 24, 24, gil::rgb_layout_t>::type;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test34.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-rgb-planar-32.tif    73x43 32-bit seperated RGB image
+void test_thirty_two_bit_seperated_rgb_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-rgb-planar-32.tif");
+
+    using image_t = gil::rgb32_planar_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test35.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-separated-contig-08.tif    73x43 8-bit contiguous CMYK image
+void test_eight_bit_contiguous_cmyk_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-separated-contig-08.tif");
+
+    using image_t = gil::cmyk8_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test36.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-separated-contig-16.tif    73x43 16-bit contiguous CMYK image
+void test_sixteen_bit_contiguous_cmyk_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-separated-contig-16.tif");
+
+    using image_t = gil::cmyk16_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test37.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-separated-planar-08.tif    73x43 8-bit separated CMYK image
+void test_eight_bit_separated_cmyk_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-separated-planar-08.tif");
+
+    using image_t = gil::cmyk8_planar_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test38.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+// flower-separated-planar-16.tif    73x43 16-bit separated CMYK image
+void test_sixteen_bit_separated_cmyk_image()
+{
+    std::string filename(tiff_in + "libtiffpic/depth/flower-separated-planar-16.tif");
+
+    using image_t = gil::cmyk16_planar_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test39.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+#endif  // BOOST_GIL_IO_USE_TIFF_LIBTIFF_TEST_SUITE_IMAGES
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+void test_tiger_separated_strip_contig_08()
+{
+    std::string filename(tiff_in_GM + "tiger-separated-strip-contig-08.tif");
+
+    using image_t = gil::cmyk8_planar_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test40.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_tiger_separated_strip_contig_16()
+{
+    std::string filename(tiff_in_GM + "tiger-separated-strip-contig-16.tif");
+
+    using image_t = gil::cmyk16_planar_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test41.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_tiger_separated_strip_planar_08()
+{
+    std::string filename(tiff_in_GM + "tiger-separated-strip-planar-08.tif");
+
+    using image_t = gil::cmyk8_planar_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test42.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_tiger_separated_strip_planar_16()
+{
+    std::string filename(tiff_in_GM + "tiger-separated-strip-planar-16.tif");
+
+    using image_t = gil::cmyk16_planar_image_t;
+    image_t img;
+    gil::read_image(filename, img, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "test43.tif", gil::view(img), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES    }
+}
+#endif  // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+int main()
+{
+#ifdef BOOST_GIL_IO_USE_TIFF_LIBTIFF_TEST_SUITE_IMAGES
+    test_two_bit_minisblack_gray_image();
+    test_four_bit_minisblack_gray_image();
+    test_six_bit_minisblack_gray_image();
+    test_eight_bit_minisblack_gray_image();
+    test_ten_bit_minisblack_gray_image();
+    test_twelve_bit_minisblack_gray_image();
+    test_fourteen_bit_minisblack_gray_image();
+    test_sixteen_bit_minisblack_gray_image();
+    test_twentyfour_bit_minisblack_gray_image();
+    test_thirtytwo_bit_minisblack_gray_image();
+    test_four_entry_colormapped_image();
+    test_sixteen_entry_colormapped_image();
+    test_twohundred_twenty_five_entry_colormapped_image();
+    test_sixtyfive_thousand_entry_colormapped_image();
+    test_two_bit_contiguous_rgb_image();
+    test_four_bit_contiguous_rgb_image();
+    test_eight_bit_contiguous_rgb_image();
+    test_ten_bit_contiguous_rgb_image();
+    test_twelve_bit_contiguous_rgb_image();
+    test_fourteen_bit_contiguous_rgb_image();
+    test_sixteen_bit_contiguous_rgb_image();
+    test_twenty_four_bit_contiguous_rgb_image();
+    test_thirty_two_bit_contiguous_rgb_image();
+    test_two_bit_seperated_rgb_image();
+    test_four_bit_seperated_rgb_image();
+    test_eight_bit_seperated_rgb_image();
+    test_ten_bit_seperated_rgb_image();
+    test_twelve_bit_seperated_rgb_image();
+    test_fourteen_bit_seperated_rgb_image();
+    test_sixteen_bit_seperated_rgb_image();
+    test_twenty_four_bit_seperated_rgb_image();
+    test_thirty_two_bit_seperated_rgb_image();
+    test_eight_bit_contiguous_cmyk_image();
+    test_sixteen_bit_contiguous_cmyk_image();
+    test_eight_bit_separated_cmyk_image();
+    test_sixteen_bit_separated_cmyk_image();
+#endif
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+    test_tiger_separated_strip_contig_08();
+    test_tiger_separated_strip_contig_16();
+    test_tiger_separated_strip_planar_08();
+    test_tiger_separated_strip_planar_16();
+#endif
+
+#if defined(BOOST_GIL_IO_USE_TIFF_LIBTIFF_TEST_SUITE_IMAGES) || defined(BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES)
+    return boost::report_errors();
+#endif
+}
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_old_test.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_old_test.cpp
new file mode 100644
index 000000000..326a75c18
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_old_test.cpp
@@ -0,0 +1,93 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff/old.hpp>
+
+#include <boost/mp11.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#include "paths.hpp"
+
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+// This test file will only test the old library's interface.
+// It's more of a compile time test than a runtime test.
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+void test_old_read_dimensions()
+{
+    boost::gil::point_t dim = gil::tiff_read_dimensions(tiff_filename);
+    BOOST_TEST_EQ(dim.x, 1000);
+    BOOST_TEST_EQ(dim.y, 600);
+}
+
+void test_old_read_image()
+{
+    gil::rgba8_image_t img;
+    gil::tiff_read_image(tiff_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 1000);
+    BOOST_TEST_EQ(img.height(), 600);
+}
+
+void test_old_read_and_convert_image()
+{
+    gil::rgb8_image_t img;
+    gil::tiff_read_and_convert_image(tiff_filename, img);
+
+    BOOST_TEST_EQ(img.width(), 1000);
+    BOOST_TEST_EQ(img.height(), 600);
+}
+
+void test_old_read_view()
+{
+    gil::rgba8_image_t img(1000, 600);
+    gil::tiff_read_view(tiff_filename, gil::view(img));
+}
+
+void test_old_read_and_convert_view()
+{
+    gil::rgb8_image_t img(1000, 600);
+    gil::tiff_read_and_convert_view(tiff_filename, gil::view(img));
+}
+
+void test_old_dynamic_image()
+{
+    using my_img_types = mp11::mp_list
+    <
+        gil::gray8_image_t,
+        gil::gray16_image_t,
+        gil::rgba8_image_t,
+        gil::gray1_image_t
+    >;
+    gil::any_image<my_img_types> image;
+
+    gil::tiff_read_image(tiff_filename.c_str(), image);
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::tiff_write_view(tiff_out + "old_dynamic_image_test.tif", gil::view(image));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_old_read_dimensions();
+    test_old_read_image();
+    test_old_read_and_convert_image();
+    test_old_read_view();
+    test_old_read_and_convert_view();
+    test_old_dynamic_image();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_subimage_test.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_subimage_test.cpp
new file mode 100644
index 000000000..062525dad
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_subimage_test.cpp
@@ -0,0 +1,128 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <fstream>
+#include <sstream>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+#include "subimage_test.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+#include <boost/preprocessor/cat.hpp>
+#include <boost/preprocessor/stringize.hpp>
+#include <boost/preprocessor/tuple/elem.hpp>
+#include <boost/preprocessor/comparison/less.hpp>
+#include <boost/preprocessor/repetition/repeat_from_to.hpp>
+
+#define BOOST_GIL_TEST_NAME_SUBIMAGE_TEST(n, data) \
+    BOOST_PP_CAT(BOOST_PP_CAT(BOOST_PP_CAT(test_, BOOST_PP_CAT(data, _)), n), bit_bit_aligned)
+
+#define BOOST_GIL_TEST_GENERATE_SUBIMAGE_TEST(z, n, data)                                          \
+    void BOOST_GIL_TEST_NAME_SUBIMAGE_TEST(n, data) ()   \
+    {                                                                                              \
+        std::string filename_strip(tiff_in_GM + "tiger-" + BOOST_PP_STRINGIZE(data) + "-strip-");  \
+        std::string filename_tile(tiff_in_GM + "tiger-" + BOOST_PP_STRINGIZE(data) + "-tile-");    \
+        std::string padding("");                                                                   \
+        if (BOOST_PP_LESS(n, 10) == 1)                                                             \
+            padding = "0";                                                                         \
+        filename_strip = filename_strip + padding + BOOST_PP_STRINGIZE(n) + ".tif";                \
+        filename_tile  = filename_tile + padding + BOOST_PP_STRINGIZE(n) + ".tif";                 \
+        gil::bit_aligned_image1_type<n, gil::gray_layout_t>::type img1, img2, img3;                \
+        gil::point_t top_left(10, 10);                                                             \
+        gil::point_t dim(32, 32);                                                                  \
+        gil::image_read_settings<gil::tiff_tag> settings(top_left, dim);                           \
+        gil::read_image(filename_strip, img1, settings);                                           \
+        gil::read_image(filename_tile, img2, settings);                                            \
+        gil::read_image(filename_strip, img3, gil::tiff_tag());                                    \
+        BOOST_TEST(gil::equal_pixels(gil::const_view(img1), gil::const_view(img2)));               \
+        BOOST_TEST(gil::equal_pixels(                                                              \
+            gil::const_view(img1), gil::subimage_view(gil::view(img3), top_left, dim)));           \
+    }
+
+#define BOOST_GIL_TEST_CALL_SUBIMAGE_TEST(z, n, data) \
+    BOOST_GIL_TEST_NAME_SUBIMAGE_TEST(n, data);
+
+BOOST_PP_REPEAT_FROM_TO(1, 8, BOOST_GIL_TEST_GENERATE_SUBIMAGE_TEST, minisblack)
+BOOST_PP_REPEAT_FROM_TO(9, 16, BOOST_GIL_TEST_GENERATE_SUBIMAGE_TEST, minisblack)
+BOOST_PP_REPEAT_FROM_TO(17, 27, BOOST_GIL_TEST_GENERATE_SUBIMAGE_TEST, minisblack)
+// TODO: there is a bug somewhere when the number of bits is 27 up to 31.
+
+void test_subimage_test_8()
+{
+    gil::gray8_image_t img1, img2, img3;
+    gil::point_t top_left(10, 10);
+    gil::point_t dim(32, 32);
+
+    gil::image_read_settings<gil::tiff_tag> settings(top_left, dim);
+
+    gil::read_image(tiff_in_GM + "tiger-minisblack-strip-08.tif", img1, settings);
+    gil::read_image(tiff_in_GM + "tiger-minisblack-tile-08.tif", img2, settings);
+    gil::read_image(tiff_in_GM + "tiger-minisblack-strip-08.tif", img3, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img1), gil::const_view(img2)));
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img1), gil::subimage_view(gil::view(img3), top_left, dim)));
+}
+
+void test_subimage_test_16()
+{
+    gil::gray16_image_t img1, img2, img3;
+    gil::point_t top_left(10, 10);
+    gil::point_t dim(32, 32);
+
+    gil::image_read_settings<gil::tiff_tag> settings(top_left, dim);
+
+    gil::read_image(tiff_in_GM + "tiger-minisblack-strip-16.tif", img1, settings);
+    gil::read_image(tiff_in_GM + "tiger-minisblack-tile-16.tif", img2, settings);
+    gil::read_image(tiff_in_GM + "tiger-minisblack-strip-16.tif", img3, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img1), gil::const_view(img2)));
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img1), gil::subimage_view(gil::view(img3), top_left, dim)));
+}
+
+void test_subimage_test_32()
+{
+    using gray32_pixel_t = gil::pixel<unsigned int, gil::gray_layout_t>;
+    gil::image<gray32_pixel_t, false> img1, img2, img3;
+
+    gil::point_t top_left(10, 10);
+    gil::point_t dim(32, 32);
+
+    gil::image_read_settings<gil::tiff_tag> settings(top_left, dim);
+
+    gil::read_image(tiff_in_GM + "tiger-minisblack-strip-32.tif", img1, settings);
+    gil::read_image(tiff_in_GM + "tiger-minisblack-tile-32.tif", img2, settings);
+    gil::read_image(tiff_in_GM + "tiger-minisblack-strip-32.tif", img3, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img1), gil::const_view(img2)));
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img1), gil::subimage_view(gil::view(img3), top_left, dim)));
+}
+
+int main()
+{
+    test_subimage_test_8();
+    test_subimage_test_16();
+    test_subimage_test_32();
+
+    BOOST_PP_REPEAT_FROM_TO(1, 8, BOOST_GIL_TEST_CALL_SUBIMAGE_TEST, minisblack)
+    BOOST_PP_REPEAT_FROM_TO(9, 16, BOOST_GIL_TEST_CALL_SUBIMAGE_TEST, minisblack)
+    BOOST_PP_REPEAT_FROM_TO(17, 27, BOOST_GIL_TEST_CALL_SUBIMAGE_TEST, minisblack)
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_test.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_test.cpp
new file mode 100644
index 000000000..f0c9d9972
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_test.cpp
@@ -0,0 +1,306 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#define BOOST_FILESYSTEM_VERSION 3
+#define BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+#include <boost/mp11.hpp>
+
+#include <fstream>
+#include <sstream>
+#include <string>
+
+#include "mandel_view.hpp"
+#include "paths.hpp"
+#include "subimage_test.hpp"
+
+namespace fs   = boost::filesystem;
+namespace gil  = boost::gil;
+namespace mp11 = boost::mp11;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
+
+void test_read_image_info()
+{
+    {
+        using backend_t   = gil::get_reader_backend<std::string const, gil::tiff_tag>::type;
+        backend_t backend = gil::read_image_info(tiff_filename, gil::tiff_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000u);
+        BOOST_TEST_EQ(backend._info._height, 600u);
+    }
+    {
+        std::ifstream in(tiff_filename.c_str(), std::ios::binary);
+
+        using backend_t   = gil::get_reader_backend<std::ifstream, gil::tiff_tag>::type;
+        backend_t backend = gil::read_image_info(in, gil::tiff_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000u);
+        BOOST_TEST_EQ(backend._info._height, 600u);
+    }
+    {
+        TIFF* file = TIFFOpen(tiff_filename.c_str(), "r");
+
+        using backend_t   = gil::get_reader_backend<FILE*, gil::tiff_tag>::type;
+        backend_t backend = gil::read_image_info(file, gil::tiff_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000u);
+        BOOST_TEST_EQ(backend._info._height, 600u);
+    }
+    {
+        fs::path my_path(tiff_filename);
+
+        using backend_t   = gil::get_reader_backend<fs::path, gil::tiff_tag>::type;
+        backend_t backend = gil::read_image_info(my_path, gil::tiff_tag());
+
+        BOOST_TEST_EQ(backend._info._width, 1000u);
+        BOOST_TEST_EQ(backend._info._height, 600u);
+    }
+}
+
+void test_read_image()
+{
+    {
+        gil::rgba8_image_t img;
+        gil::read_image(tiff_filename, img, gil::tiff_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        std::ifstream in(tiff_filename.c_str(), std::ios::binary);
+
+        gil::rgba8_image_t img;
+        gil::read_image(in, img, gil::tiff_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        TIFF* file = TIFFOpen(tiff_filename.c_str(), "r");
+
+        gil::rgba8_image_t img;
+        gil::read_image(file, img, gil::tiff_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+}
+
+void test_read_and_convert_image()
+{
+    {
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(tiff_filename, img, gil::tiff_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        std::ifstream in(tiff_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(in, img, gil::tiff_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        TIFF* file = TIFFOpen(tiff_filename.c_str(), "r");
+
+        gil::rgb8_image_t img;
+        gil::read_and_convert_image(file, img, gil::tiff_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+}
+
+void test_read_and_convert_image_2()
+{
+    gil::gray8_image_t img;
+    gil::read_and_convert_image(tiff_filename, img, gil::tiff_tag());
+
+    gil::rgba8_image_t img2;
+    gil::read_image(tiff_filename, img2, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(
+        gil::const_view(img),
+        gil::color_converted_view<gil::gray8_pixel_t>(gil::const_view(img2))));
+}
+
+void test_read_view()
+{
+    {
+        gil::rgba8_image_t img(1000, 600);
+        gil::read_view(tiff_filename, gil::view(img), gil::tiff_tag());
+    }
+    {
+        std::ifstream in(tiff_filename.c_str(), std::ios::binary);
+
+        gil::rgba8_image_t img(1000, 600);
+        gil::read_view(in, gil::view(img), gil::tiff_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        TIFF* file = TIFFOpen(tiff_filename.c_str(), "r");
+
+        gil::rgba8_image_t img(1000, 600);
+        gil::read_view(file, gil::view(img), gil::tiff_tag());
+    }
+}
+
+void test_read_and_convert_view()
+{
+    {
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_and_convert_view(tiff_filename, gil::view(img), gil::tiff_tag());
+    }
+    {
+        std::ifstream in(tiff_filename.c_str(), std::ios::binary);
+
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_and_convert_view(in, gil::view(img), gil::tiff_tag());
+
+        BOOST_TEST_EQ(img.width(), 1000u);
+        BOOST_TEST_EQ(img.height(), 600u);
+    }
+    {
+        TIFF* file = TIFFOpen(tiff_filename.c_str(), "r");
+
+        gil::rgb8_image_t img(1000, 600);
+        gil::read_and_convert_view(file, gil::view(img), gil::tiff_tag());
+    }
+}
+
+void test_write_view()
+{
+    auto const b = gil::rgb8_pixel_t(0, 0, 255);
+    auto const g = gil::rgb8_pixel_t(0, 255, 0);
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    {
+        std::string filename(tiff_out + "write_test_string.tif");
+
+        gil::write_view(filename, create_mandel_view(320, 240, b, g), gil::tiff_tag());
+    }
+    {
+        std::string filename(tiff_out + "write_test_ofstream.tif");
+        std::ofstream out(filename.c_str(), std::ios_base::binary);
+
+        gil::write_view(out, create_mandel_view(320, 240, b, g), gil::tiff_tag());
+    }
+    {
+        std::string filename(tiff_out + "write_test_tiff.tif");
+        TIFF* file = TIFFOpen(filename.c_str(), "w");
+
+        gil::write_view(file, create_mandel_view(320, 240, b, g), gil::tiff_tag());
+    }
+    {
+        std::string filename(tiff_out + "write_test_info.tif");
+
+        gil::image_write_info<gil::tiff_tag> info;
+        gil::write_view(filename, create_mandel_view(320, 240, b, g), info);
+    }
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_stream()
+{
+    // 1. Read an image.
+    std::ifstream in(tiff_filename.c_str(), std::ios::binary);
+
+    gil::rgba8_image_t img;
+    gil::read_image(in, img, gil::tiff_tag());
+
+    // 2. Write image to in-memory buffer.
+    std::stringstream out_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    gil::write_view(out_buffer, gil::view(img), gil::tiff_tag());
+
+    // 3. Copy in-memory buffer to another.
+    std::stringstream in_buffer(std::ios_base::in | std::ios_base::out | std::ios_base::binary);
+    in_buffer << out_buffer.rdbuf();
+
+    // 4. Read in-memory buffer to gil image
+    gil::rgba8_image_t dst;
+    gil::read_image(in_buffer, dst, gil::tiff_tag());
+
+    // 5. Write out image.
+    std::string filename(tiff_out + "stream_test.tif");
+    std::ofstream out(filename.c_str(), std::ios_base::binary);
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(out, gil::view(dst), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_stream_2()
+{
+    std::filebuf in_buf;
+    if (!in_buf.open(tiff_filename.c_str(), std::ios::in | std::ios::binary))
+    {
+        BOOST_TEST(false);
+    }
+    std::istream in(&in_buf);
+
+    gil::rgba8_image_t img;
+    gil::read_image(in, img, gil::tiff_tag());
+}
+
+void test_subimage()
+{
+    run_subimage_test<gil::rgba8_image_t, gil::tiff_tag>(
+        tiff_filename, gil::point_t(0, 0), gil::point_t(50, 50));
+
+    run_subimage_test<gil::rgba8_image_t, gil::tiff_tag>(
+        tiff_filename, gil::point_t(50, 50), gil::point_t(50, 50));
+}
+
+void test_dynamic_image()
+{
+    // FIXME: This test has been disabled for now because of compilation issues with MSVC10.
+
+    using my_img_types = mp11::mp_list
+    <
+        gil::gray8_image_t,
+        gil::gray16_image_t,
+        gil::rgb8_image_t,
+        gil::rgba8_image_t,
+        gil::gray1_image_t
+    >;
+    gil::any_image<my_img_types> image;
+
+    gil::read_image(tiff_filename.c_str(), image, gil::tiff_tag());
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "dynamic_image_test.tif", gil::view(image), gil::tiff_tag());
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_read_image_info();
+    test_read_image();
+    test_read_and_convert_image();
+    test_read_and_convert_image_2();
+    test_read_view();
+    test_read_and_convert_view();
+    test_write_view();
+    test_stream();
+    test_stream_2();
+    test_subimage();
+    test_dynamic_image();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif  // BOOST_GIL_IO_TEST_ALLOW_READING_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_float_test.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_float_test.cpp
new file mode 100644
index 000000000..c5236de96
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_float_test.cpp
@@ -0,0 +1,111 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "paths.hpp"
+
+namespace gil  = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+void test_read_minisblack_float_tile_and_strip32()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-minisblack-float-strip-32.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-minisblack-float-tile-32.tif");
+
+    gil::gray32f_image_t img_strip, img_tile;
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+void test_read_minisblack_float_tile_and_strip64()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-minisblack-float-strip-64.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-minisblack-float-tile-64.tif");
+
+    // FIXME: boost/gil/extension/io/tiff/detail/is_allowed.hpp:229:49: error: ambiguous partial specializations of 'Format_Type
+    //        discovered during https://github.com/boostorg/gil/issues/461
+    //gil::gray64f_image_t img_strip, img_tile;
+    //gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    //gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+    //BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+void test_read_rgb_float_tile_and_strip_planar32()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-float-strip-planar-32.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-float-tile-planar-32.tif");
+
+    gil::rgb32f_image_t img_strip, img_tile;
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+void test_read_rgb_float_tile_and_strip_contig32()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-float-strip-contig-32.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-float-tile-contig-32.tif");
+
+    gil::rgb32f_image_t img_strip, img_tile;
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+void test_read_rgb_float_tile_and_strip_contig64()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-float-strip-contig-64.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-float-tile-contig-64.tif");
+
+    // FIXME: boost/gil/extension/io/tiff/detail/is_allowed.hpp:229:49: error: ambiguous partial specializations of 'Format_Type
+    //        discovered during https://github.com/boostorg/gil/issues/461
+    //gil::rgb64f_image_t img_strip, img_tile;
+    //gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    //gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+    //BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+void test_read_rgb_float_tile_and_strip64()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-float-strip-planar-64.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-float-tile-planar-64.tif");
+
+    // FIXME: boost/gil/extension/io/tiff/detail/is_allowed.hpp:229:49: error: ambiguous partial specializations of 'Format_Type
+    //        discovered during https://github.com/boostorg/gil/issues/461
+    //gil::rgb64f_image_t img_strip, img_tile;
+    //gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    //gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+    //BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+int main()
+{
+    test_read_minisblack_float_tile_and_strip32();
+    test_read_minisblack_float_tile_and_strip64();
+    test_read_rgb_float_tile_and_strip_planar32();
+    test_read_rgb_float_tile_and_strip_contig32();
+    test_read_rgb_float_tile_and_strip_contig64();
+    test_read_rgb_float_tile_and_strip64();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_test_1-10.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_test_1-10.cpp
new file mode 100644
index 000000000..9311b4c6e
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_test_1-10.cpp
@@ -0,0 +1,47 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+BOOST_PP_REPEAT_FROM_TO(1, 8, BOOST_GIL_TEST_GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_MINISBLACK, minisblack)
+BOOST_PP_REPEAT_FROM_TO(9, 11, BOOST_GIL_TEST_GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_MINISBLACK, minisblack)
+
+void test_read_tile_and_compare_with_minisblack_strip_8()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-minisblack-strip-08.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-minisblack-tile-08.tif");
+
+    gil::gray8_image_t img_strip, img_tile;
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+int main()
+{
+    test_read_tile_and_compare_with_minisblack_strip_8();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_test_11-20.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_test_11-20.cpp
new file mode 100644
index 000000000..2ae10db91
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_test_11-20.cpp
@@ -0,0 +1,48 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+BOOST_PP_REPEAT_FROM_TO(11, 16, BOOST_GIL_TEST_GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_MINISBLACK, minisblack )
+BOOST_PP_REPEAT_FROM_TO(17, 21, BOOST_GIL_TEST_GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_MINISBLACK, minisblack )
+
+void test_read_tile_and_compare_with_minisblack_strip_16()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-minisblack-strip-16.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-minisblack-tile-16.tif");
+
+    gil::gray16_image_t img_strip, img_tile;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+int main()
+{
+    test_read_tile_and_compare_with_minisblack_strip_16();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_test_21-31_32-64.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_test_21-31_32-64.cpp
new file mode 100644
index 000000000..cc166bcf2
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_test_21-31_32-64.cpp
@@ -0,0 +1,64 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+#include <string>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+BOOST_PP_REPEAT_FROM_TO(21, 32, BOOST_GIL_TEST_GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_MINISBLACK, minisblack )
+
+void test_read_tile_and_compare_with_minisblack_strip_32()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-minisblack-strip-32.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-minisblack-tile-32.tif");
+
+    using gray32_pixel_t = gil::pixel<unsigned int, gil::gray_layout_t>;
+    gil::image<gray32_pixel_t, false> img_strip, img_tile;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST_EQ(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)), true);
+}
+
+void test_read_tile_and_compare_with_minisblack_strip_64()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-minisblack-strip-64.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-minisblack-tile-64.tif");
+
+    using gray64_pixel_t = gil::pixel<std::uint64_t, gil::gray_layout_t>;
+    gil::image<gray64_pixel_t, false> img_strip, img_tile;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST_EQ(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)), true);
+}
+
+int main()
+{
+    test_read_tile_and_compare_with_minisblack_strip_32();
+    test_read_tile_and_compare_with_minisblack_strip_64();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_write_test_1-10.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_write_test_1-10.cpp
new file mode 100644
index 000000000..d069d28c2
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_write_test_1-10.cpp
@@ -0,0 +1,56 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "tiff_tiled_write_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+BOOST_PP_REPEAT_FROM_TO(1, 8 , GENERATE_WRITE_TILE_BIT_ALIGNED_MINISBLACK, minisblack)
+BOOST_PP_REPEAT_FROM_TO(9, 11, GENERATE_WRITE_TILE_BIT_ALIGNED_MINISBLACK, minisblack)
+
+void test_write_minisblack_tile_and_compare_with_8()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-minisblack-strip-08.tif");
+
+    gil::gray8_image_t img_strip, img_saved;
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+
+    gil::image_write_info<gil::tiff_tag> info;
+    info._is_tiled   = true;
+    info._tile_width = info._tile_length = 16;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(
+        tiff_out + "write_minisblack_tile_and_compare_with_8.tif", gil::view(img_strip), info);
+    gil::read_image(
+        tiff_out + "write_minisblack_tile_and_compare_with_8.tif", img_saved, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_saved)));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_write_minisblack_tile_and_compare_with_8();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_write_test_11-20.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_write_test_11-20.cpp
new file mode 100644
index 000000000..f49f3b8b8
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_write_test_11-20.cpp
@@ -0,0 +1,54 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "tiff_tiled_write_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+BOOST_PP_REPEAT_FROM_TO(11, 16, GENERATE_WRITE_TILE_BIT_ALIGNED_MINISBLACK, minisblack)
+BOOST_PP_REPEAT_FROM_TO(17, 21, GENERATE_WRITE_TILE_BIT_ALIGNED_MINISBLACK, minisblack)
+
+void test_write_minisblack_tile_and_compare_with_16()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-minisblack-strip-16.tif");
+
+    gil::gray16_image_t img_strip, img_saved;
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+
+    gil::image_write_info<gil::tiff_tag> info;
+    info._is_tiled   = true;
+    info._tile_width = info._tile_length = 16;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(tiff_out + "write_minisblack_tile_and_compare_with_16.tif", gil::view(img_strip), info);
+    gil::read_image(tiff_out + "write_minisblack_tile_and_compare_with_16.tif", img_saved, gil::tiff_tag());
+
+    BOOST_TEST_EQ(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_saved)), true);
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_write_minisblack_tile_and_compare_with_16();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_write_test_21-31_32-64.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_write_test_21-31_32-64.cpp
new file mode 100644
index 000000000..ff457bc45
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_minisblack_write_test_21-31_32-64.cpp
@@ -0,0 +1,79 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+#include <string>
+
+#include "tiff_tiled_write_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+BOOST_PP_REPEAT_FROM_TO(21, 32, GENERATE_WRITE_TILE_BIT_ALIGNED_MINISBLACK, minisblack)
+
+void test_write_tile_and_compare_with_minisblack_strip_32()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-minisblack-strip-32.tif");
+
+    using gray32_pixel_t = gil::pixel<unsigned int, gil::gray_layout_t>;
+    gil::image<gray32_pixel_t, false> img_strip, img_saved;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+
+    gil::image_write_info<gil::tiff_tag> info;
+    info._is_tiled   = true;
+    info._tile_width = info._tile_length = 16;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(
+        tiff_out + "write_minisblack_tile_and_compare_with_32.tif", gil::view(img_strip), info);
+    gil::read_image(tiff_out + "write_minisblack_tile_and_compare_with_32.tif", img_saved, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_saved)));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_write_tile_and_compare_with_minisblack_strip_64()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-minisblack-strip-64.tif");
+
+    using gray64_pixel_t = gil::pixel<std::uint64_t, gil::gray_layout_t>;
+    gil::image<gray64_pixel_t, false> img_strip, img_saved;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+
+    gil::image_write_info<gil::tiff_tag> info;
+    info._is_tiled   = true;
+    info._tile_width = info._tile_length = 16;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    write_view(tiff_out + "write_minisblack_tile_and_compare_with_64.tif", gil::view(img_strip), info);
+    gil::read_image(tiff_out + "write_minisblack_tile_and_compare_with_64.tif", img_saved, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_saved)));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_write_tile_and_compare_with_minisblack_strip_32();
+    test_write_tile_and_compare_with_minisblack_strip_64();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif  // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_test_1-8.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_test_1-8.cpp
new file mode 100644
index 000000000..c6cb6d1f6
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_test_1-8.cpp
@@ -0,0 +1,31 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+// CHH - not supported palette
+//BOOST_PP_REPEAT_FROM_TO(1, 9, GENERATE_TILE_STRIP_COMPARISON_PALETTE, palette )
+
+int main()
+{
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_test_8-16.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_test_8-16.cpp
new file mode 100644
index 000000000..5610b9689
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_test_8-16.cpp
@@ -0,0 +1,31 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+// CHH - not supported palette
+//BOOST_PP_REPEAT_FROM_TO(9, 17, GENERATE_TILE_STRIP_COMPARISON_PALETTE, palette )
+
+int main()
+{
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_write_test_1-8.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_write_test_1-8.cpp
new file mode 100644
index 000000000..e5b01296a
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_write_test_1-8.cpp
@@ -0,0 +1,31 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "tiff_tiled_write_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+// CHH - not supported palette
+//BOOST_PP_REPEAT_FROM_TO(1, 9, GENERATE_WRITE_TILE_BIT_ALIGNED_PALETTE, palette )
+
+int main()
+{
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_write_test_8-16.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_write_test_8-16.cpp
new file mode 100644
index 000000000..345b79dc6
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_palette_write_test_8-16.cpp
@@ -0,0 +1,31 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "tiff_tiled_write_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+// CHH - not supported palette
+//BOOST_PP_REPEAT_FROM_TO(9, 17, GENERATE_WRITE_TILE_BIT_ALIGNED_PALETTE, palette )
+
+int main()
+{
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_read_macros.hpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_read_macros.hpp
new file mode 100644
index 000000000..201a799dd
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_read_macros.hpp
@@ -0,0 +1,114 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_TEST_EXTENSION_IO_TIFF_TIFF_TILED_READ_MACROS_HPP
+#define BOOST_GIL_TEST_EXTENSION_IO_TIFF_TIFF_TILED_READ_MACROS_HPP
+
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff/read.hpp>
+
+#include <boost/preprocessor/cat.hpp>
+#include <boost/preprocessor/stringize.hpp>
+#include <boost/preprocessor/tuple/elem.hpp>
+#include <boost/preprocessor/comparison/less.hpp>
+#include <boost/preprocessor/repetition/repeat_from_to.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "paths.hpp"
+
+// TODO: Rename macros to use BOOST_GIL_ prefix. See https://github.com/boostorg/gil/issues/410 ~mloskot
+// TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+#define BOOST_GIL_TEST_NAME_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB(n, data)                     \
+    BOOST_PP_CAT(                                                                                  \
+        BOOST_PP_CAT(                                                                              \
+            BOOST_PP_CAT(                                                                          \
+                BOOST_PP_CAT(                                                                      \
+                    BOOST_PP_CAT(read_tile_and_compare_with_, BOOST_PP_TUPLE_ELEM(2, 0, data)),    \
+                    BOOST_PP_TUPLE_ELEM(2, 1, data)),                                              \
+                _strip_),                                                                          \
+            n),                                                                                    \
+        bit_bit_aligned)
+
+#define BOOST_GIL_TEST_GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB(z, n, data)                  \
+    void BOOST_GIL_TEST_NAME_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB(n, data)()                  \
+    {                                                                                              \
+        namespace gil = boost::gil;                                                                \
+        std::string filename_strip(                                                                \
+            tiff_in_GM + "tiger-" + BOOST_PP_STRINGIZE(BOOST_PP_TUPLE_ELEM(2, 0, data)) +          \
+            "-strip-" + BOOST_PP_STRINGIZE(BOOST_PP_TUPLE_ELEM(2, 1, data)) + "-");                \
+        std::string filename_tile(                                                                 \
+            tiff_in_GM + "tiger-" + BOOST_PP_STRINGIZE(BOOST_PP_TUPLE_ELEM(2, 0, data)) +          \
+            "-tile-" + BOOST_PP_STRINGIZE(BOOST_PP_TUPLE_ELEM(2, 1, data)) + "-");                 \
+        std::string padding("");                                                                   \
+        if (BOOST_PP_LESS(n, 10) == 1)                                                             \
+            padding = "0";                                                                         \
+        filename_strip = filename_strip + padding + BOOST_PP_STRINGIZE(n) + ".tif";                \
+        filename_tile  = filename_tile + padding + BOOST_PP_STRINGIZE(n) + ".tif";                 \
+        gil::bit_aligned_image3_type<n, n, n, gil::rgb_layout_t>::type img_strip, img_tile;        \
+        gil::read_image(filename_strip, img_strip, gil::tiff_tag());                               \
+        gil::read_image(filename_tile, img_tile, gil::tiff_tag());                                 \
+        BOOST_TEST_EQ(                                                                             \
+            gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)), true);       \
+    }
+
+// Special case for minisblack images
+#define BOOST_GIL_TEST_NAME_TILE_TILE_STRIP_COMPARISON_BIT_ALIGNED_MINISBLACK(n, data)                         \
+    BOOST_PP_CAT(                                                                                  \
+        BOOST_PP_CAT(BOOST_PP_CAT(BOOST_PP_CAT(read_tile_and_compare_with_, data), _strip_), n),   \
+        bit_bit_aligned)
+
+#define BOOST_GIL_TEST_GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_MINISBLACK(z, n, data)           \
+    void BOOST_GIL_TEST_NAME_TILE_TILE_STRIP_COMPARISON_BIT_ALIGNED_MINISBLACK(n, data)()                      \
+    {                                                                                              \
+        namespace gil = boost::gil;                                                                \
+        std::string filename_strip(tiff_in_GM + "tiger-" + BOOST_PP_STRINGIZE(data) + "-strip-");  \
+        std::string filename_tile(tiff_in_GM + "tiger-" + BOOST_PP_STRINGIZE(data) + "-tile-");    \
+        std::string padding("");                                                                   \
+        if (BOOST_PP_LESS(n, 10) == 1)                                                             \
+            padding = "0";                                                                         \
+        filename_strip = filename_strip + padding + BOOST_PP_STRINGIZE(n) + ".tif";                \
+        filename_tile  = filename_tile + padding + BOOST_PP_STRINGIZE(n) + ".tif";                 \
+        gil::bit_aligned_image1_type<n, gil::gray_layout_t>::type img_strip, img_tile;             \
+        gil::read_image(filename_strip, img_strip, gil::tiff_tag());                               \
+        gil::read_image(filename_tile, img_tile, gil::tiff_tag());                                 \
+        BOOST_TEST_EQ(                                                                             \
+            gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)), true);       \
+    }
+
+// Special case for palette images
+#define BOOST_GIL_TEST_NAME_TILE_STRIP_COMPARISON_PALETTE(n, data)                                 \
+    BOOST_PP_CAT(                                                                                  \
+        BOOST_PP_CAT(BOOST_PP_CAT(BOOST_PP_CAT(read_tile_and_compare_with_, data), _strip_), n),   \
+        bit)
+
+#define BOOST_GIL_TEST_GENERATE_TILE_STRIP_COMPARISON_PALETTE(z, n, data)                          \
+    void BOOST_GIL_TEST_NAME_TILE_STRIP_COMPARISON_PALETTE(n, data)()                              \
+    {                                                                                              \
+        namespace gil = boost::gil;                                                                \
+        std::string filename_strip(tiff_in_GM + "tiger-" + BOOST_PP_STRINGIZE(data) + "-strip-");  \
+        std::string filename_tile(tiff_in_GM + "tiger-" + BOOST_PP_STRINGIZE(data) + "-tile-");    \
+        std::string padding("");                                                                   \
+        if (BOOST_PP_LESS(n, 10) == 1)                                                             \
+            padding = "0";                                                                         \
+        filename_strip = filename_strip + padding + BOOST_PP_STRINGIZE(n) + ".tif";                \
+        filename_tile  = filename_tile + padding + BOOST_PP_STRINGIZE(n) + ".tif";                 \
+        gil::rgb16_image_t img_strip, img_tile;                                                    \
+        gil::read_image(filename_strip, img_strip, gil::tiff_tag());                               \
+        gil::read_image(filename_tile, img_tile, gil::tiff_tag());                                 \
+        BOOST_TEST_EQ(                                                                             \
+            gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)), true);       \
+    }
+
+#define BOOST_GIL_TEST_CALL_TILE_STRIP_COMPARISON_PALETTE(z, n, data) \
+    BOOST_GIL_TEST_NAME_TILE_STRIP_COMPARISON_PALETTE(n, data);
+
+
+#endif // BOOST_GIL_TEST_EXTENSION_IO_TIFF_TIFF_TILED_READ_MACROS_HPP
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_test_1-10.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_test_1-10.cpp
new file mode 100644
index 000000000..8f9e09f90
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_test_1-10.cpp
@@ -0,0 +1,48 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+BOOST_PP_REPEAT_FROM_TO(1, 8, BOOST_GIL_TEST_GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB, (rgb, contig))
+BOOST_PP_REPEAT_FROM_TO(9, 11, BOOST_GIL_TEST_GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB, (rgb, contig))
+
+void test_read_tile_and_compare_with_rgb_contig_strip_8()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-contig-08.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-tile-contig-08.tif");
+
+    gil::rgb8_image_t img_strip, img_tile;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+int main()
+{
+    test_read_tile_and_compare_with_rgb_contig_strip_8();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_test_11-20.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_test_11-20.cpp
new file mode 100644
index 000000000..f82139194
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_test_11-20.cpp
@@ -0,0 +1,49 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+// FIXME: The (rgb, contig) construct does not seem to work! ~mloskot
+BOOST_PP_REPEAT_FROM_TO(11, 16, GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB, (rgb, contig))
+BOOST_PP_REPEAT_FROM_TO(17, 21, GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB, (rgb, contig))
+
+void test_read_tile_and_compare_with_rgb_contig_strip_16()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-contig-16.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-tile-contig-16.tif");
+
+    gil::rgb16_image_t img_strip, img_tile;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+int main()
+{
+    test_read_tile_and_compare_with_rgb_contig_strip_8();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_test_21-31_32_64.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_test_21-31_32_64.cpp
new file mode 100644
index 000000000..13f6a71f5
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_test_21-31_32_64.cpp
@@ -0,0 +1,65 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+#include <string>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+// FIXME: The (rgb, planar) construct does not seem to work! ~mloskot
+BOOST_PP_REPEAT_FROM_TO(21, 32, GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB, (rgb, contig))
+
+void test_read_tile_and_compare_with_rgb_contig_strip_32()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-contig-32.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-tile-contig-32.tif");
+
+    using rgb32_pixel_t = gil::pixel<unsigned int, gil::rgb_layout_t>;
+    gil::image<rgb32_pixel_t, false> img_strip, img_tile;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+void test_read_tile_and_compare_with_rgb_contig_strip_64()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-contig-64.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-tile-contig-64.tif");
+
+    using rgb64_pixel_t = gil::pixel<std::uint64_t, gil::rgb_layout_t>;
+    gil::image<rgb64_pixel_t, false> img_strip, img_tile;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+int main()
+{
+    test_read_tile_and_compare_with_rgb_contig_strip_32();
+    test_read_tile_and_compare_with_rgb_contig_strip_64();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_write_test_1-10.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_write_test_1-10.cpp
new file mode 100644
index 000000000..222d036ae
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_write_test_1-10.cpp
@@ -0,0 +1,59 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "tiff_tiled_write_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+BOOST_PP_REPEAT_FROM_TO(1, 8, GENERATE_WRITE_TILE_BIT_ALIGNED_RGB, rgb)
+BOOST_PP_REPEAT_FROM_TO(9, 11, GENERATE_WRITE_TILE_BIT_ALIGNED_RGB, rgb)
+
+void test_write_tile_and_compare_with_rgb_strip_contig_8()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-contig-08.tif");
+
+    gil::rgb8_image_t img_strip, img_saved;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+
+    gil::image_write_info<gil::tiff_tag> info;
+    info._is_tiled   = true;
+    info._tile_width = info._tile_length = 16;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(
+        tiff_out + "write_tile_and_compare_with_rgb_strip_contig_8.tif", gil::view(img_strip),
+        info);
+    gil::read_image(
+        tiff_out + "write_tile_and_compare_with_rgb_strip_contig_8.tif", img_saved,
+        gil::tiff_tag());
+
+    BOOST_TEST_EQ(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_saved)), true);
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_write_tile_and_compare_with_rgb_strip_contig_8();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_write_test_11-20.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_write_test_11-20.cpp
new file mode 100644
index 000000000..257d75811
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_write_test_11-20.cpp
@@ -0,0 +1,59 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "tiff_tiled_write_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+BOOST_PP_REPEAT_FROM_TO(11, 16, GENERATE_WRITE_TILE_BIT_ALIGNED_RGB, rgb)
+BOOST_PP_REPEAT_FROM_TO(17, 21, GENERATE_WRITE_TILE_BIT_ALIGNED_RGB, rgb)
+
+void test_write_tile_and_compare_with_rgb_strip_contig_16()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-contig-16.tif");
+
+    gil::rgb16_image_t img_strip, img_saved;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+
+    gil::image_write_info<gil::tiff_tag> info;
+    info._is_tiled   = true;
+    info._tile_width = info._tile_length = 16;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(
+        tiff_out + "write_tile_and_compare_with_rgb_strip_contig_16.tif", gil::view(img_strip),
+        info);
+    gil::read_image(
+        tiff_out + "write_tile_and_compare_with_rgb_strip_contig_16.tif", img_saved,
+        gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_saved)));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_write_tile_and_compare_with_rgb_strip_contig_16();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_write_test_21-31_32_64.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_write_test_21-31_32_64.cpp
new file mode 100644
index 000000000..54ff02819
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_contig_write_test_21-31_32_64.cpp
@@ -0,0 +1,86 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+#include <string>
+
+#include "tiff_tiled_write_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+BOOST_PP_REPEAT_FROM_TO(21, 31, GENERATE_WRITE_TILE_BIT_ALIGNED_RGB, rgb)
+
+void test_write_tile_and_compare_with_rgb_strip_contig_32()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-contig-32.tif");
+
+    using rgb32_pixel_t = gil::pixel<unsigned int, gil::rgb_layout_t>;
+    gil::image<rgb32_pixel_t, false> img_strip, img_saved;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+
+    gil::image_write_info<gil::tiff_tag> info;
+    info._is_tiled   = true;
+    info._tile_width = info._tile_length = 16;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(
+        tiff_out + "write_tile_and_compare_with_rgb_strip_contig_32.tif", gil::view(img_strip),
+        info);
+    gil::read_image(
+        tiff_out + "write_tile_and_compare_with_rgb_strip_contig_32.tif", img_saved,
+        gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_saved)));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+void test_write_tile_and_compare_with_rgb_strip_contig_64()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-contig-64.tif");
+
+    using rgb64_pixel_t = gil::pixel<std::uint64_t, gil::rgb_layout_t>;
+    gil::image<rgb64_pixel_t, false> img_strip, img_saved;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+
+    gil::image_write_info<gil::tiff_tag> info;
+    info._is_tiled   = true;
+    info._tile_width = info._tile_length = 16;
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+    gil::write_view(
+        tiff_out + "write_tile_and_compare_with_rgb_strip_contig_64.tif", gil::view(img_strip),
+        info);
+    gil::read_image(
+        tiff_out + "write_tile_and_compare_with_rgb_strip_contig_64.tif", img_saved,
+        gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_saved)));
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+}
+
+int main()
+{
+    test_write_tile_and_compare_with_rgb_strip_contig_32();
+    test_write_tile_and_compare_with_rgb_strip_contig_64();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_planar_test_1-10.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_planar_test_1-10.cpp
new file mode 100644
index 000000000..ba54b1647
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_planar_test_1-10.cpp
@@ -0,0 +1,49 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+// FIXME: The (rgb, planar) construct does not seem to work! ~mloskot
+BOOST_PP_REPEAT_FROM_TO(1, 8, GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB, (rgb, planar))
+BOOST_PP_REPEAT_FROM_TO(9, 11, GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB, (rgb, planar))
+
+void test_read_tile_and_compare_with_rgb_planar_strip_8()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-planar-08.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-tile-planar-08.tif");
+
+    gil::rgb8_image_t img_strip, img_tile;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+int main()
+{
+    test_read_tile_and_compare_with_rgb_planar_strip_8();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif  // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_planar_test_11-20.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_planar_test_11-20.cpp
new file mode 100644
index 000000000..69438c8ff
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_planar_test_11-20.cpp
@@ -0,0 +1,48 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+BOOST_PP_REPEAT_FROM_TO(11, 16, GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB, (rgb, planar))
+BOOST_PP_REPEAT_FROM_TO(17, 21, GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB, (rgb, planar))
+
+void test_read_tile_and_compare_with_rgb_planar_strip_16()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-planar-16.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-tile-planar-16.tif");
+
+    gil::rgb16_image_t img_strip, img_tile;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+int main()
+{
+    test_read_tile_and_compare_with_rgb_planar_strip_16();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif  // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_planar_test_21-31_32_64.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_planar_test_21-31_32_64.cpp
new file mode 100644
index 000000000..bc5b02f8a
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_rgb_planar_test_21-31_32_64.cpp
@@ -0,0 +1,65 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+#include <string>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+// FIXME: The (rgb, planar) construct does not seem to work! ~mloskot
+BOOST_PP_REPEAT_FROM_TO(21, 32, GENERATE_TILE_STRIP_COMPARISON_BIT_ALIGNED_RGB, (rgb, planar))
+
+void test_read_tile_and_compare_with_rgb_planar_strip_32()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-planar-32.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-tile-planar-32.tif");
+
+    using rgb32_pixel_t = gil::pixel<unsigned int, gil::rgb_layout_t>;
+    gil::image<rgb32_pixel_t, false> img_strip, img_tile;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+void test_read_tile_and_compare_with_rgb_planar_strip_64()
+{
+    std::string filename_strip(tiff_in_GM + "tiger-rgb-strip-planar-64.tif");
+    std::string filename_tile(tiff_in_GM + "tiger-rgb-tile-planar-64.tif");
+
+    using rgb64_pixel_t = gil::pixel<std::uint64_t, gil::rgb_layout_t>;
+    gil::image<rgb64_pixel_t, false> img_strip, img_tile;
+
+    gil::read_image(filename_strip, img_strip, gil::tiff_tag());
+    gil::read_image(filename_tile, img_tile, gil::tiff_tag());
+
+    BOOST_TEST(gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_tile)));
+}
+
+int main()
+{
+    test_read_tile_and_compare_with_rgb_planar_strip_32();
+    test_read_tile_and_compare_with_rgb_planar_strip_64();
+
+    // TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif  // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_test.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_test.cpp
new file mode 100644
index 000000000..6a29d1c7a
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_test.cpp
@@ -0,0 +1,84 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <string>
+
+#include "tiff_tiled_read_macros.hpp"
+
+namespace gil = boost::gil;
+
+#ifdef BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
+
+void test_read_info_tile_minisblack_float()
+{
+    using backend_t = gil::get_reader_backend<std::string const, gil::tiff_tag>::type;
+    backend_t backend =
+        gil::read_image_info(tiff_in_GM + "tiger-minisblack-float-tile-16.tif", gil::tiff_tag());
+
+    BOOST_TEST_EQ(backend._info._tile_width, 16);
+    BOOST_TEST_EQ(backend._info._tile_length, 16);
+}
+
+void test_read_info_tile_minisblack()
+{
+    using backend_t = gil::get_reader_backend<std::string const, gil::tiff_tag>::type;
+    backend_t backend =
+        gil::read_image_info(tiff_in_GM + "tiger-minisblack-tile-08.tif", gil::tiff_tag());
+
+    BOOST_TEST_EQ(backend._info._tile_width, 16);
+    BOOST_TEST_EQ(backend._info._tile_length, 16);
+}
+
+void test_read_info_tile_palette()
+{
+    using backend_t = gil::get_reader_backend<std::string const, gil::tiff_tag>::type;
+    backend_t backend =
+        gil::read_image_info(tiff_in_GM + "tiger-palette-tile-08.tif", gil::tiff_tag());
+
+    BOOST_TEST_EQ(backend._info._tile_width, 16);
+    BOOST_TEST_EQ(backend._info._tile_length, 16);
+}
+
+void test_read_info_tile_rgb()
+{
+    using backend_t = gil::get_reader_backend<std::string const, gil::tiff_tag>::type;
+    backend_t backend =
+        gil::read_image_info(tiff_in_GM + "tiger-rgb-tile-contig-08.tif", gil::tiff_tag());
+
+    BOOST_TEST_EQ(backend._info._tile_width, 16);
+    BOOST_TEST_EQ(backend._info._tile_length, 16);
+}
+
+void test_read_info_tile_planar()
+{
+    using backend_t = gil::get_reader_backend<std::string const, gil::tiff_tag>::type;
+    backend_t backend =
+        gil::read_image_info(tiff_in_GM + "tiger-rgb-tile-planar-08.tif", gil::tiff_tag());
+
+    BOOST_TEST_EQ(backend._info._tile_width, 16);
+    BOOST_TEST_EQ(backend._info._tile_length, 16);
+}
+
+int main()
+{
+    test_read_info_tile_minisblack_float();
+    test_read_info_tile_minisblack();
+    test_read_info_tile_palette();
+    test_read_info_tile_rgb();
+    test_read_info_tile_planar();
+
+    return boost::report_errors();
+}
+
+#else
+int main() {}
+#endif  // BOOST_GIL_IO_USE_TIFF_GRAPHICSMAGICK_TEST_SUITE_IMAGES
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_write_macros.hpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_write_macros.hpp
new file mode 100644
index 000000000..2e3fd1147
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_tiled_write_macros.hpp
@@ -0,0 +1,177 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_TEST_EXTENSION_IO_TIFF_TIFF_TILED_WRITE_MACROS_HPP
+#define BOOST_GIL_TEST_EXTENSION_IO_TIFF_TIFF_TILED_WRITE_MACROS_HPP
+
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+
+#include <boost/preprocessor/cat.hpp>
+#include <boost/preprocessor/stringize.hpp>
+#include <boost/preprocessor/tuple/elem.hpp>
+#include <boost/preprocessor/comparison/less.hpp>
+#include <boost/preprocessor/repetition/repeat_from_to.hpp>
+
+#include <string>
+
+#include "paths.hpp"
+
+// TODO: Rename macros to use BOOST_GIL_ prefix. See https://github.com/boostorg/gil/issues/410 ~mloskot
+// TODO: Make sure generated test cases are executed. See tiff_subimage_test.cpp. ~mloskot
+
+#ifdef BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+
+#define GENERATE_WRITE_TILE_BIT_ALIGNED_RGB(z, n, data)                                            \
+    void BOOST_PP_CAT(                                                                             \
+        BOOST_PP_CAT(                                                                              \
+            BOOST_PP_CAT(BOOST_PP_CAT(write_rgb_tile_and_compare_with_, data), _strip_), n),       \
+        bit_bit_aligned)()                                                                         \
+    {                                                                                              \
+        namespace gil = boost::gil;                                                                \
+        std::string filename(std::string("tiger-") + BOOST_PP_STRINGIZE(data) + "-strip-contig-");           \
+        std::string path(tiff_in_GM);                                                                   \
+        std::string padding("");                                                                        \
+        if (BOOST_PP_LESS(n, 10) == 1)                                                             \
+            padding = "0";                                                                         \
+        filename += padding + BOOST_PP_STRINGIZE(n) + ".tif";                                      \
+        path += filename;                                                                          \
+        gil::bit_aligned_image3_type<n, n, n, gil::rgb_layout_t>::type img_strip, img_saved;       \
+        gil::read_image(path, img_strip, gil::tiff_tag());                                         \
+        gil::image_write_info<gil::tiff_tag> info;                                                 \
+        info._is_tiled   = true;                                                                   \
+        info._tile_width = info._tile_length = 16;                                                 \
+        gil::write_view(tiff_out + filename, gil::view(img_strip), info);                          \
+        gil::read_image(tiff_out + filename, img_saved, gil::tiff_tag());                          \
+        BOOST_TEST_EQ(                                                                             \
+            gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_saved)), true);      \
+    }
+
+// Special case for minisblack images
+#define GENERATE_WRITE_TILE_BIT_ALIGNED_MINISBLACK(z, n, data)                                     \
+    void BOOST_PP_CAT(                                                                             \
+        BOOST_PP_CAT(                                                                              \
+            BOOST_PP_CAT(BOOST_PP_CAT(write_minisblack_tile_and_compare_with_, data), _strip_),    \
+            n),                                                                                    \
+        bit_bit_aligned)()                                                                         \
+    {                                                                                              \
+        namespace gil = boost::gil;                                                                \
+        std::string filename(std::string("tiger-") + BOOST_PP_STRINGIZE(data) + "-strip-");                  \
+        std::string path(tiff_in_GM);                                                                   \
+        std::string padding("");                                                                        \
+        if (BOOST_PP_LESS(n, 10) == 1)                                                             \
+            padding = "0";                                                                         \
+        filename = filename + padding + BOOST_PP_STRINGIZE(n) + ".tif";                            \
+        path += filename;                                                                          \
+        gil::bit_aligned_image1_type<n, gil::gray_layout_t>::type img_strip, img_saved;                 \
+        gil::read_image(path, img_strip, gil::tiff_tag());                                         \
+        gil::image_write_info<gil::tiff_tag> info;                                                 \
+        info._is_tiled   = true;                                                                   \
+        info._tile_width = info._tile_length = 16;                                                 \
+        gil::write_view(tiff_out + filename, gil::view(img_strip), info);                          \
+        gil::read_image(tiff_out + filename, img_saved, gil::tiff_tag());                          \
+        BOOST_TEST_EQ(                                                                             \
+            gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_saved)), true);      \
+    }
+
+// Special case for palette images
+#define GENERATE_WRITE_TILE_BIT_ALIGNED_PALETTE(z, n, data)                                        \
+    void BOOST_PP_CAT(                                                                             \
+        BOOST_PP_CAT(                                                                              \
+            BOOST_PP_CAT(BOOST_PP_CAT(write_palette_tile_and_compare_with_, data), _strip_), n),   \
+        bit)()                                                                                     \
+    {                                                                                              \
+        namespace gil = boost::gil;                                                                \
+        std::string filename(std::string("tiger-") + BOOST_PP_STRINGIZE(data) + "-strip-");                  \
+        std::string path(tiff_in_GM);                                                                   \
+        std::string padding("");                                                                        \
+        if (BOOST_PP_LESS(n, 10) == 1)                                                             \
+            padding = "0";                                                                         \
+        filename = filename + padding + BOOST_PP_STRINGIZE(n) + ".tif";                            \
+        path += filename;                                                                          \
+        gil::rgb16_image_t img_strip, img_saved;                                                   \
+        gil::read_image(path, img_strip, gil::tiff_tag());                                         \
+        gil::image_write_info<gil::tiff_tag> info;                                                 \
+        info._is_tiled   = true;                                                                   \
+        info._tile_width = info._tile_length = 16;                                                 \
+        gil::write_view(tiff_out + filename, gil::view(img_strip), info);                          \
+        gil::read_image(tiff_out + filename, img_saved, gil::tiff_tag());                          \
+        BOOST_TEST_EQ(                                                                             \
+            gil::equal_pixels(gil::const_view(img_strip), gil::const_view(img_saved)), true);      \
+    }
+
+#else
+
+#define GENERATE_WRITE_TILE_BIT_ALIGNED_RGB(z, n, data)                                            \
+    void BOOST_PP_CAT(                                                                             \
+        BOOST_PP_CAT(                                                                              \
+            BOOST_PP_CAT(BOOST_PP_CAT(write_rgb_tile_and_compare_with_, data), _strip_), n),       \
+        bit_bit_aligned)()                                                                         \
+    {                                                                                              \
+        namespace gil = boost::gil;                                                                \
+        std::string filename(std::string("tiger-") + BOOST_PP_STRINGIZE(data) + "-strip-contig-");           \
+        std::string path(tiff_in_GM);                                                                   \
+        std::string padding("");                                                                        \
+        if (BOOST_PP_LESS(n, 10) == 1)                                                             \
+            padding = "0";                                                                         \
+        filename += padding + BOOST_PP_STRINGIZE(n) + ".tif";                                      \
+        path += filename;                                                                          \
+        gil::bit_aligned_image3_type<n, n, n, gil::rgb_layout_t>::type img_strip, img_saved;       \
+        gil::read_image(path, img_strip, gil::tiff_tag());                                         \
+        gil::image_write_info<gil::tiff_tag> info;                                                 \
+        info._is_tiled   = true;                                                                   \
+        info._tile_width = info._tile_length = 16;                                                 \
+    }
+
+// Special case for minisblack images
+#define GENERATE_WRITE_TILE_BIT_ALIGNED_MINISBLACK(z, n, data)                                     \
+    voidBOOST_PP_CAT(                                                                              \
+        BOOST_PP_CAT(                                                                              \
+            BOOST_PP_CAT(BOOST_PP_CAT(write_minisblack_tile_and_compare_with_, data), _strip_),    \
+            n),                                                                                    \
+        bit_bit_aligned)()                                                                         \
+    {                                                                                              \
+        namespace gil = boost::gil;                                                                \
+        std::string filename(std::string("tiger-") + BOOST_PP_STRINGIZE(data) + "-strip-");                  \
+        std::string path(tiff_in_GM);                                                                   \
+        std::string padding("");                                                                        \
+        if (BOOST_PP_LESS(n, 10) == 1)                                                             \
+            padding = "0";                                                                         \
+        filename = filename + padding + BOOST_PP_STRINGIZE(n) + ".tif";                            \
+        path += filename;                                                                          \
+        gil::bit_aligned_image1_type<n, gil::gray_layout_t>::type img_strip, img_saved;            \
+        gil::read_image(path, img_strip, gil::tiff_tag());                                         \
+        gil::image_write_info<gil::tiff_tag> info;                                                 \
+        info._is_tiled   = true;                                                                   \
+        info._tile_width = info._tile_length = 16;                                                 \
+    }
+
+// Special case for palette images
+#define GENERATE_WRITE_TILE_BIT_ALIGNED_PALETTE(z, n, data)                                        \
+    void BOOST_PP_CAT(                                                                             \
+        BOOST_PP_CAT(                                                                              \
+            BOOST_PP_CAT(BOOST_PP_CAT(write_palette_tile_and_compare_with_, data), _strip_), n),   \
+        bit)()                                                                                     \
+    {                                                                                              \
+        namespace gil = boost::gil;                                                                \
+        std::string filename(std::string("tiger-") + BOOST_PP_STRINGIZE(data) + "-strip-");                  \
+        std::string path(tiff_in_GM);                                                                   \
+        std::string padding("");                                                                        \
+        if (BOOST_PP_LESS(n, 10) == 1)                                                             \
+            padding = "0";                                                                         \
+        filename = filename + padding + BOOST_PP_STRINGIZE(n) + ".tif";                            \
+        path += filename;                                                                          \
+        gil::rgb16_image_t img_strip, img_saved;                                                   \
+        gil::read_image(path, img_strip, gil::tiff_tag());                                         \
+        gil::image_write_info<gil::tiff_tag> info;                                                 \
+        info._is_tiled   = true;                                                                   \
+        info._tile_width = info._tile_length = 16;                                                 \
+    }
+
+#endif  // BOOST_GIL_IO_TEST_ALLOW_WRITING_IMAGES
+
+#endif // BOOST_GIL_TEST_EXTENSION_IO_TIFF_TIFF_TILED_WRITE_MACROS_HPP
diff --git a/src/boost/libs/gil/test/extension/io/tiff/tiff_write_test.cpp b/src/boost/libs/gil/test/extension/io/tiff/tiff_write_test.cpp
new file mode 100644
index 000000000..0f97a6e17
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/io/tiff/tiff_write_test.cpp
@@ -0,0 +1,31 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/io/tiff.hpp>
+#include <boost/gil/io/typedefs.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "color_space_write_test.hpp"
+#include "mandel_view.hpp"
+#include "paths.hpp"
+
+namespace gil = boost::gil;
+
+void test_rgb_color_space_write()
+{
+    color_space_write_test<gil::tiff_tag>(
+        tiff_out + "rgb_color_space_test.tif", tiff_out + "bgr_color_space_test.tif");
+}
+
+int main()
+{
+    test_rgb_color_space_write();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/CMakeLists.txt b/src/boost/libs/gil/test/extension/numeric/CMakeLists.txt
new file mode 100644
index 000000000..4702c52c8
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/CMakeLists.txt
@@ -0,0 +1,39 @@
+#
+# Copyright (c) 2017 Mateusz Loskot <mateusz at loskot dot net>
+# All rights reserved.
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+message(STATUS "Boost.GIL: Configuring tests in test/extension/numeric")
+
+foreach(_name
+  channel_numeric_operations
+  convolve
+  convolve_2d
+  convolve_cols
+  convolve_rows
+  extend_boundary
+  kernel
+  kernel_fixed
+  matrix3x2
+  pixel_numeric_operations
+  pixel_numeric_operations_float
+  resample)
+  set(_test t_ext_numeric_${_name})
+  set(_target test_ext_numeric_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/extension/numeric/Jamfile b/src/boost/libs/gil/test/extension/numeric/Jamfile
new file mode 100644
index 000000000..9662357c4
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/Jamfile
@@ -0,0 +1,28 @@
+# Boost.GIL (Generic Image Library) - Numeric tests
+#
+# Copyright (c) 2013 Christian Henning
+# Copyright (c) 2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+alias headers : [ generate_self_contained_headers extension/numeric ] ;
+
+compile-fail kernel_1d_fixed_even_size_fail.cpp ;
+
+run channel_numeric_operations.cpp ;
+run convolve.cpp ;
+run convolve_2d.cpp ;
+run convolve_cols.cpp ;
+run convolve_rows.cpp ;
+run extend_boundary.cpp ;
+run kernel.cpp ;
+run kernel_fixed.cpp ;
+run matrix3x2.cpp ;
+run pixel_numeric_operations.cpp ;
+run pixel_numeric_operations_float.cpp ;
+run resample.cpp ;
+
diff --git a/src/boost/libs/gil/test/extension/numeric/channel_numeric_operations.cpp b/src/boost/libs/gil/test/extension/numeric/channel_numeric_operations.cpp
new file mode 100644
index 000000000..4f75cbbc6
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/channel_numeric_operations.cpp
@@ -0,0 +1,484 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/channel_numeric_operations.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <tuple>
+#include <type_traits>
+
+#include "test_utility_output_stream.hpp"
+#include "core/channel/test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+struct test_plus_integer_same_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        gil::channel_plus_t<channel_t, channel_t, channel_t> f;
+        BOOST_TEST_EQ(f(0, 0), channel_t(0));
+        BOOST_TEST_EQ(f(100, 27), channel_t(127));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_plus_integer_same_types{});
+    }
+};
+
+struct test_plus_integer_mixed_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        {
+            using channel1_t = channel_t;
+            using channel2_t = std::uint8_t; // duplicates only one of fixture::channel_integer_types
+            gil::channel_plus_t<channel1_t, channel2_t, channel1_t> f;
+            BOOST_TEST_EQ(f(0, 0), channel1_t(0));
+            BOOST_TEST_EQ(f(100, 27), channel_t(127));
+        }
+        {
+            using channel1_t = std::uint8_t; // duplicates only one of fixture::channel_integer_types
+            using channel2_t = channel_t;
+            gil::channel_plus_t<channel1_t, channel2_t, channel2_t> f;
+            BOOST_TEST_EQ(f(0, 0), channel2_t(0));
+            BOOST_TEST_EQ(f(100, 27), channel_t(127));
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_plus_integer_mixed_types{});
+    }
+};
+
+struct test_plus_integer_signed_types_with_overflow
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        // Signed integer overflow is UB, so just check addition does not yield mathematically
+        // expected value but is constrained by the range of representable values for given type.
+
+        auto const max_value = gil::channel_traits<channel_t>::max_value();
+        gil::channel_plus_t<channel_t, channel_t, channel_t> f;
+        BOOST_TEST_NE(f(max_value, 1), std::int64_t(max_value) + 1);
+        BOOST_TEST_NE(f(max_value, max_value), std::int64_t(max_value) + max_value);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_signed_types>(test_plus_integer_signed_types_with_overflow{});
+    }
+};
+
+struct test_plus_integer_unsigned_types_with_wraparound
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        // The C Standard, 6.2.5, paragraph 9 [ISO/IEC 9899:2011], states:
+        // A computation involving unsigned operands can never overflow, because a result that
+        // cannot be represented by the resulting unsigned integer type is reduced modulo the number
+        // that is one greater than the largest value that can be represented by the resulting type.
+
+        auto const max_value = gil::channel_traits<channel_t>::max_value();
+        auto const min_value = gil::channel_traits<channel_t>::min_value();
+        gil::channel_plus_t<channel_t, channel_t, channel_t> f;
+        BOOST_TEST_EQ(f(max_value, 1), min_value);
+        BOOST_TEST_EQ(f(max_value, max_value), max_value - 1);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_unsigned_types>(test_plus_integer_unsigned_types_with_wraparound{});
+    }
+};
+
+struct test_minus_integer_same_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        gil::channel_minus_t<channel_t, channel_t, channel_t> f;
+        BOOST_TEST_EQ(f(0, 0), channel_t(0));
+        BOOST_TEST_EQ(f(100, 27), channel_t(73));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_minus_integer_same_types{});
+    }
+};
+
+struct test_minus_integer_mixed_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        {
+            using channel1_t = channel_t;
+            using channel2_t = std::uint8_t; // duplicates only one of fixture::channel_integer_types
+            gil::channel_minus_t<channel1_t, channel2_t, channel1_t> f;
+            BOOST_TEST_EQ(f(0, 0), channel1_t(0));
+            BOOST_TEST_EQ(f(100, 27), channel_t(73));
+        }
+        {
+            using channel1_t = std::uint8_t; // duplicates only one of fixture::channel_integer_types
+            using channel2_t = channel_t;
+            gil::channel_minus_t<channel1_t, channel2_t, channel2_t> f;
+            BOOST_TEST_EQ(f(0, 0), channel2_t(0));
+            BOOST_TEST_EQ(f(100, 27), channel_t(73));
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_minus_integer_mixed_types{});
+    }
+};
+
+struct test_multiplies_integer_same_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        gil::channel_multiplies_t<channel_t, channel_t, channel_t> f;
+        BOOST_TEST_EQ(f(0, 0), channel_t(0));
+        BOOST_TEST_EQ(f(1, 1), channel_t(1));
+        BOOST_TEST_EQ(f(4, 2), channel_t(8));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_multiplies_integer_same_types{});
+    }
+};
+
+struct test_multiplies_integer_mixed_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        {
+            using channel1_t = channel_t;
+            using channel2_t = std::uint8_t; // duplicates only one of fixture::channel_integer_types
+            gil::channel_multiplies_t<channel1_t, channel2_t, channel1_t> f;
+            BOOST_TEST_EQ(f(0, 0), channel1_t(0));
+            BOOST_TEST_EQ(f(4, 2), channel_t(8));
+        }
+        {
+            using channel1_t = std::uint8_t; // duplicates only one of fixture::channel_integer_types
+            using channel2_t = channel_t;
+            gil::channel_multiplies_t<channel1_t, channel2_t, channel2_t> f;
+            BOOST_TEST_EQ(f(0, 0), channel2_t(0));
+            BOOST_TEST_EQ(f(4, 2), channel_t(8));
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_multiplies_integer_mixed_types{});
+    }
+};
+
+struct test_divides_integer_same_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        gil::channel_divides_t<channel_t, channel_t, channel_t> f;
+        BOOST_TEST_EQ(f(0, 1), channel_t(0));
+        BOOST_TEST_EQ(f(1, 1), channel_t(1));
+        BOOST_TEST_EQ(f(4, 2), channel_t(2));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_divides_integer_same_types{});
+    }
+};
+
+struct test_divides_integer_mixed_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        {
+            using channel1_t = channel_t;
+            using channel2_t = std::uint8_t; // duplicates only one of fixture::channel_integer_types
+            gil::channel_divides_t<channel1_t, channel2_t, channel1_t> f;
+            BOOST_TEST_EQ(f(0, 1), channel1_t(0));
+            BOOST_TEST_EQ(f(4, 2), channel_t(2));
+        }
+        {
+            using channel1_t = std::uint8_t; // duplicates only one of fixture::channel_integer_types
+            using channel2_t = channel_t;
+            gil::channel_divides_t<channel1_t, channel2_t, channel2_t> f;
+            BOOST_TEST_EQ(f(0, 1), channel2_t(0));
+            BOOST_TEST_EQ(f(4, 2), channel_t(2));
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_divides_integer_mixed_types{});
+    }
+};
+
+struct test_plus_scalar_integer_same_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        gil::channel_plus_scalar_t<channel_t, int, channel_t> f;
+        BOOST_TEST_EQ(f(0, 0), channel_t(0));
+        BOOST_TEST_EQ(f(100, 27), channel_t(127));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_plus_scalar_integer_same_types{});
+    }
+};
+
+struct test_plus_scalar_integer_mixed_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        using channel_result_t = std::uint8_t;
+        gil::channel_plus_scalar_t<channel_t, int, channel_result_t> f;
+        BOOST_TEST_EQ(f(0, 0), channel_result_t(0));
+        BOOST_TEST_EQ(f(100, 27), channel_result_t(127));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_plus_scalar_integer_mixed_types{});
+    }
+};
+
+struct test_minus_scalar_integer_same_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        gil::channel_minus_scalar_t<channel_t, int, channel_t> f;
+        BOOST_TEST_EQ(f(0, 0), channel_t(0));
+        BOOST_TEST_EQ(f(100, 27), channel_t(73));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_minus_scalar_integer_same_types{});
+    }
+};
+
+struct test_minus_scalar_integer_mixed_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        using channel_result_t = std::uint8_t;
+        gil::channel_minus_scalar_t<channel_t, int, std::uint8_t> f;
+        BOOST_TEST_EQ(f(0, 0), channel_result_t(0));
+        BOOST_TEST_EQ(f(100, 27), channel_result_t(73));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_minus_scalar_integer_mixed_types{});
+    }
+};
+
+struct test_multiplies_scalar_integer_same_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        gil::channel_multiplies_scalar_t<channel_t, channel_t, channel_t> f;
+        BOOST_TEST_EQ(f(0, 0), channel_t(0));
+        BOOST_TEST_EQ(f(1, 1), channel_t(1));
+        BOOST_TEST_EQ(f(4, 2), channel_t(8));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_multiplies_scalar_integer_same_types{});
+    }
+};
+
+struct test_multiplies_scalar_integer_mixed_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        using channel_result_t = std::uint8_t;
+        gil::channel_multiplies_scalar_t<channel_t, int, channel_result_t> f;
+        BOOST_TEST_EQ(f(0, 0), channel_result_t(0));
+        BOOST_TEST_EQ(f(4, 2), channel_result_t(8));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_multiplies_scalar_integer_mixed_types{});
+    }
+};
+
+struct test_divides_scalar_integer_same_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        gil::channel_divides_scalar_t<channel_t, channel_t, channel_t> f;
+        BOOST_TEST_EQ(f(0, 1), channel_t(0));
+        BOOST_TEST_EQ(f(1, 1), channel_t(1));
+        BOOST_TEST_EQ(f(4, 2), channel_t(2));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_divides_scalar_integer_same_types{});
+    }
+};
+
+struct test_divides_scalar_integer_mixed_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        using channel_result_t = std::uint8_t; // duplicates only one of fixture::channel_integer_types
+        gil::channel_divides_scalar_t<channel_t, int, channel_result_t> f;
+        BOOST_TEST_EQ(f(0, 1), channel_t(0));
+        BOOST_TEST_EQ(f(4, 2), channel_t(2));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_divides_scalar_integer_mixed_types{});
+    }
+};
+
+struct test_halves_integer_same_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        gil::channel_halves_t<channel_t> f;
+        {
+            channel_t c(0);
+            f(c);
+            BOOST_TEST_EQ(c, channel_t(0));
+        }
+        {
+            channel_t c(2);
+            f(c);
+            BOOST_TEST_EQ(c, channel_t(1));
+        }
+        {
+            channel_t c(4);
+            f(c);
+            BOOST_TEST_EQ(c, channel_t(2));
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_halves_integer_same_types{});
+    }
+};
+
+struct test_zeros_integer_same_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        gil::channel_zeros_t<channel_t> f;
+        {
+            channel_t c(0);
+            f(c);
+            BOOST_TEST_EQ(c, channel_t(0));
+        }
+        {
+            channel_t c(2);
+            f(c);
+            BOOST_TEST_EQ(c, channel_t(0));
+        }
+        {
+            channel_t c(4);
+            f(c);
+            BOOST_TEST_EQ(c, channel_t(0));
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_zeros_integer_same_types{});
+    }
+};
+
+struct test_assigns_integer_same_types
+{
+    template <typename Channel>
+    void operator()(Channel const&)
+    {
+        using channel_t = Channel;
+        gil::channel_assigns_t<channel_t, channel_t> f;
+        {
+            channel_t c1(10);
+            channel_t c2(20);
+            f(c1, c2);
+            BOOST_TEST_EQ(c2, c1);
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::channel_integer_types>(test_assigns_integer_same_types{});
+    }
+};
+
+int main()
+{
+    test_plus_integer_same_types::run();
+    test_plus_integer_mixed_types::run();
+    test_plus_integer_signed_types_with_overflow::run();
+    test_plus_integer_unsigned_types_with_wraparound::run();
+
+    test_minus_integer_same_types::run();
+    test_minus_integer_mixed_types::run();
+
+    test_multiplies_integer_same_types::run();
+    test_multiplies_integer_mixed_types::run();
+
+    test_divides_integer_same_types::run();
+    test_divides_integer_mixed_types::run();
+
+    test_plus_scalar_integer_same_types::run();
+    test_plus_scalar_integer_mixed_types::run();
+
+    test_minus_scalar_integer_same_types::run();
+    test_minus_scalar_integer_mixed_types::run();
+
+    test_multiplies_scalar_integer_same_types::run();
+    test_multiplies_scalar_integer_mixed_types::run();
+
+    test_divides_scalar_integer_same_types::run();
+    test_divides_scalar_integer_mixed_types::run();
+
+    test_halves_integer_same_types::run();
+    test_zeros_integer_same_types::run();
+    test_assigns_integer_same_types::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/convolve.cpp b/src/boost/libs/gil/test/extension/numeric/convolve.cpp
new file mode 100644
index 000000000..7fe008ea0
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/convolve.cpp
@@ -0,0 +1,121 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/convolve.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <tuple>
+#include <type_traits>
+
+#include "test_fixture.hpp"
+#include "core/test_fixture.hpp"
+#include "core/image/test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+struct test_image_1x1_kernel_1x1_identity
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        auto const img = fixture::create_image<image_t>(1, 1, 7);
+        image_t img_out(img);
+
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto const kernel = fixture::create_kernel<channel_t>({1});
+        gil::detail::convolve_1d<pixel_t>(gil::const_view(img_out), kernel, gil::view(img_out));
+
+        // 1x1 kernel reduces convolution to multiplication
+        BOOST_TEST(gil::const_view(img).front() == gil::const_view(img_out).front());
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_image_1x1_kernel_1x1_identity{});
+    }
+};
+
+struct test_image_1x1_kernel_3x3_identity
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        auto const img = fixture::create_image<Image>(1, 1, 7);
+        image_t img_out(img);
+
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto const kernel = fixture::create_kernel<channel_t>({0, 0, 0, 0, 1, 0, 0, 0, 0});
+        gil::detail::convolve_1d<pixel_t>(gil::const_view(img_out), kernel, gil::view(img_out));
+
+        BOOST_TEST(gil::const_view(img).front() == gil::const_view(img_out).front());
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_image_1x1_kernel_3x3_identity{});
+    }
+};
+
+struct test_image_3x3_kernel_3x3_identity
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto const img = fixture::generate_image<image_t>(3, 3, fixture::random_value<channel_t>{});
+        image_t img_out(img);
+
+        auto const kernel = fixture::create_kernel<channel_t>({0, 0, 0, 0, 1, 0, 0, 0, 0});
+        gil::detail::convolve_1d<pixel_t>(gil::const_view(img_out), kernel, gil::view(img_out));
+
+        BOOST_TEST(gil::equal_pixels(gil::const_view(img), gil::const_view(img_out)));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_image_3x3_kernel_3x3_identity{});
+    }
+};
+
+struct test_image_5x5_kernel_3x3_identity
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto const img = fixture::generate_image<image_t>(5, 5, fixture::random_value<channel_t>{});
+        image_t img_out(img);
+
+        auto const kernel = fixture::create_kernel<channel_t>({0, 0, 0, 0, 1, 0, 0, 0, 0});
+        gil::detail::convolve_1d<pixel_t>(gil::const_view(img_out), kernel, gil::view(img_out));
+        // TODO: Test different boundary options
+
+        BOOST_TEST(gil::equal_pixels(gil::const_view(img), gil::const_view(img_out)));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_image_5x5_kernel_3x3_identity{});
+    }
+};
+
+int main()
+{
+    test_image_1x1_kernel_1x1_identity::run();
+    test_image_1x1_kernel_3x3_identity::run();
+    test_image_3x3_kernel_3x3_identity::run();
+    test_image_5x5_kernel_3x3_identity::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/convolve_2d.cpp b/src/boost/libs/gil/test/extension/numeric/convolve_2d.cpp
new file mode 100644
index 000000000..fbfce5f96
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/convolve_2d.cpp
@@ -0,0 +1,68 @@
+//
+// Copyright 2019 Miral Shah <miralshah2211@gmail.com>
+//
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/convolve.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstddef>
+
+namespace gil = boost::gil;
+
+std::uint8_t img[] =
+{
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 255, 0, 0, 0, 255, 0, 0,
+    0, 0, 0, 255, 0, 255, 0, 0, 0,
+    0, 0, 0, 0, 255, 0, 0, 0, 0,
+    0, 0, 0, 255, 0, 255, 0, 0, 0,
+    0, 0, 255, 0, 0, 0, 255, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+std::uint8_t output[] =
+{
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 28, 28, 28, 0, 28, 28, 28, 0,
+    0, 28, 56, 56, 56, 56, 56, 28, 0,
+    0, 28, 56, 85, 85, 85, 56, 28, 0,
+    0, 0, 56, 85, 141, 85, 56, 0, 0,
+    0, 28, 56, 85, 85, 85, 56, 28, 0,
+    0, 28, 56, 56, 56, 56, 56, 28, 0,
+    0, 28, 28, 28, 0, 28, 28, 28, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+void test_convolve_2d_with_normalized_mean_filter()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t*>(img), 9);
+
+    gil::image<gil::gray8_pixel_t> temp_img(src_view.width(), src_view.height());
+    typename gil::image<gil::gray8_pixel_t>::view_t temp_view = view(temp_img);
+    gil::gray8_view_t dst_view(temp_view);
+
+    std::vector<float> v(9, 1.0f / 9.0f);
+    gil::detail::kernel_2d<float> kernel(v.begin(), v.size(), 1, 1);
+
+    gil::detail::convolve_2d(src_view, kernel, dst_view);
+
+    gil::gray8c_view_t out_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t*>(output), 9);
+
+    BOOST_TEST(gil::equal_pixels(out_view, dst_view));
+}
+
+int main()
+{
+    test_convolve_2d_with_normalized_mean_filter();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/convolve_cols.cpp b/src/boost/libs/gil/test/extension/numeric/convolve_cols.cpp
new file mode 100644
index 000000000..c9e5576db
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/convolve_cols.cpp
@@ -0,0 +1,73 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/convolve.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <tuple>
+#include <type_traits>
+
+#include "test_fixture.hpp"
+#include "core/image/test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+struct test_image_1x1_kernel_1x1_identity
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        auto const img = fixture::create_image<image_t>(1, 1, 7);
+        auto img_out = fixture::create_image<image_t>(1, 1, 0);
+
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto const kernel = fixture::create_kernel<channel_t>({1});
+        gil::convolve_cols<pixel_t>(const_view(img), kernel, view(img_out));
+
+        // 1x1 kernel reduces convolution to multiplication
+        BOOST_TEST(gil::const_view(img).front() == gil::const_view(img_out).front());
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_image_1x1_kernel_1x1_identity{});
+    }
+};
+
+struct test_image_1x1_kernel_3x3_identity
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        auto const img = fixture::create_image<image_t>(1, 1, 7);
+        auto img_out = fixture::create_image<image_t>(1, 1, 0);
+
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto const kernel = fixture::create_kernel<channel_t>({0, 0, 0, 0, 1, 0, 0, 0, 0});
+        gil::convolve_cols<pixel_t>(const_view(img), kernel, view(img_out));
+
+        BOOST_TEST(gil::const_view(img).front() == gil::const_view(img_out).front());
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_image_1x1_kernel_3x3_identity{});
+    }
+};
+
+int main()
+{
+    test_image_1x1_kernel_1x1_identity::run();
+    test_image_1x1_kernel_3x3_identity::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/convolve_rows.cpp b/src/boost/libs/gil/test/extension/numeric/convolve_rows.cpp
new file mode 100644
index 000000000..d9b735479
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/convolve_rows.cpp
@@ -0,0 +1,73 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/convolve.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <tuple>
+#include <type_traits>
+
+#include "test_fixture.hpp"
+#include "core/image/test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+struct test_image_1x1_kernel_1x1_identity
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        auto const img = fixture::create_image<image_t>(1, 1, 7);
+        auto img_out = fixture::create_image<image_t>(1, 1, 0);
+
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto const kernel = fixture::create_kernel<channel_t>({1});
+        gil::convolve_rows<pixel_t>(const_view(img), kernel, view(img_out));
+
+        // 1x1 kernel reduces convolution to multiplication
+        BOOST_TEST(gil::const_view(img).front() == gil::const_view(img_out).front());
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_image_1x1_kernel_1x1_identity{});
+    }
+};
+
+struct test_image_1x1_kernel_3x3_identity
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        auto const img = fixture::create_image<image_t>(1, 1, 7);
+        auto img_out = fixture::create_image<image_t>(1, 1, 0);
+
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto const kernel = fixture::create_kernel<channel_t>({0, 0, 0, 0, 1, 0, 0, 0, 0});
+        gil::convolve_rows<pixel_t>(const_view(img), kernel, view(img_out));
+
+        BOOST_TEST(gil::const_view(img).front() == gil::const_view(img_out).front());
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_image_1x1_kernel_3x3_identity{});
+    }
+};
+
+int main()
+{
+    test_image_1x1_kernel_1x1_identity::run();
+    test_image_1x1_kernel_3x3_identity::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/extend_boundary.cpp b/src/boost/libs/gil/test/extension/numeric/extend_boundary.cpp
new file mode 100644
index 000000000..f432ad69b
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/extend_boundary.cpp
@@ -0,0 +1,252 @@
+//
+// Copyright 2019 Pranam Lashkari <plashkari628@gmail.com>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/algorithm.hpp>
+#include <boost/gil/extension/numeric/convolve.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+namespace gil = boost::gil;
+
+std::uint8_t img[] =
+{
+    1, 2, 3, 4, 5, 6, 7, 8, 9,
+    10, 0, 0, 0, 0, 0, 0, 0, 32,
+    11, 0, 255, 0, 0, 0, 255, 0, 31,
+    12, 0, 0, 255, 0, 255, 0, 0, 30,
+    13, 0, 0, 0, 255, 0, 0, 0, 29,
+    14, 0, 0, 255, 0, 255, 0, 0, 28,
+    15, 0, 255, 0, 0, 0, 255, 0, 27,
+    16, 0, 0, 0, 0, 0, 0, 0, 26,
+    17, 18, 19, 20, 21, 22, 23, 24, 25
+};
+
+std::uint8_t row_output_constant[] =
+{
+    1, 2, 3, 4, 5, 6, 7, 8, 9,
+    1, 2, 3, 4, 5, 6, 7, 8, 9,
+    1, 2, 3, 4, 5, 6, 7, 8, 9,
+    10, 0, 0, 0, 0, 0, 0, 0, 32,
+    11, 0, 255, 0, 0, 0, 255, 0, 31,
+    12, 0, 0, 255, 0, 255, 0, 0, 30,
+    13, 0, 0, 0, 255, 0, 0, 0, 29,
+    14, 0, 0, 255, 0, 255, 0, 0, 28,
+    15, 0, 255, 0, 0, 0, 255, 0, 27,
+    16, 0, 0, 0, 0, 0, 0, 0, 26,
+    17, 18, 19, 20, 21, 22, 23, 24, 25,
+    17, 18, 19, 20, 21, 22, 23, 24, 25,
+    17, 18, 19, 20, 21, 22, 23, 24, 25
+};
+
+std::uint8_t row_output_zero[] =
+{
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    1, 2, 3, 4, 5, 6, 7, 8, 9,
+    10, 0, 0, 0, 0, 0, 0, 0, 32,
+    11, 0, 255, 0, 0, 0, 255, 0, 31,
+    12, 0, 0, 255, 0, 255, 0, 0, 30,
+    13, 0, 0, 0, 255, 0, 0, 0, 29,
+    14, 0, 0, 255, 0, 255, 0, 0, 28,
+    15, 0, 255, 0, 0, 0, 255, 0, 27,
+    16, 0, 0, 0, 0, 0, 0, 0, 26,
+    17, 18, 19, 20, 21, 22, 23, 24, 25,
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+
+std::uint8_t col_output_constant[] =
+{
+    1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9,
+    10, 10, 0, 0, 0, 0, 0, 0, 0, 32, 32,
+    11, 11, 0, 255, 0, 0, 0, 255, 0, 31, 31,
+    12, 12, 0, 0, 255, 0, 255, 0, 0, 30, 30,
+    13, 13, 0, 0, 0, 255, 0, 0, 0, 29, 29,
+    14, 14, 0, 0, 255, 0, 255, 0, 0, 28, 28,
+    15, 15, 0, 255, 0, 0, 0, 255, 0, 27, 27,
+    16, 16, 0, 0, 0, 0, 0, 0, 0, 26, 26,
+    17, 17, 18, 19, 20, 21, 22, 23, 24, 25, 25
+};
+
+std::uint8_t col_output_zero[] =
+{
+    0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0,
+    0, 0, 10, 0, 0, 0, 0, 0, 0, 0, 32, 0, 0,
+    0, 0, 11, 0, 255, 0, 0, 0, 255, 0, 31, 0, 0,
+    0, 0, 12, 0, 0, 255, 0, 255, 0, 0, 30, 0, 0,
+    0, 0, 13, 0, 0, 0, 255, 0, 0, 0, 29, 0, 0,
+    0, 0, 14, 0, 0, 255, 0, 255, 0, 0, 28, 0, 0,
+    0, 0, 15, 0, 255, 0, 0, 0, 255, 0, 27, 0, 0,
+    0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 26, 0, 0,
+    0, 0, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0
+};
+
+std::uint8_t boundary_output_constant[] =
+{
+    1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 9,
+    1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 9,
+    1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 9,
+    10, 10, 10, 0, 0, 0, 0, 0, 0, 0, 32, 32, 32,
+    11, 11, 11, 0, 255, 0, 0, 0, 255, 0, 31, 31, 31,
+    12, 12, 12, 0, 0, 255, 0, 255, 0, 0, 30, 30, 30,
+    13, 13, 13, 0, 0, 0, 255, 0, 0, 0, 29, 29, 29,
+    14, 14, 14, 0, 0, 255, 0, 255, 0, 0, 28, 28, 28,
+    15, 15, 15, 0, 255, 0, 0, 0, 255, 0, 27, 27, 27,
+    16, 16, 16, 0, 0, 0, 0, 0, 0, 0, 26, 26, 26,
+    17, 17, 17, 18, 19, 20, 21, 22, 23, 24, 25, 25, 25,
+    17, 17, 17, 18, 19, 20, 21, 22, 23, 24, 25, 25, 25,
+    17, 17, 17, 18, 19, 20, 21, 22, 23, 24, 25, 25, 25
+};
+
+std::uint8_t boundary_output_zero[] =
+{
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0,
+    0, 0, 10, 0, 0, 0, 0, 0, 0, 0, 32, 0, 0,
+    0, 0, 11, 0, 255, 0, 0, 0, 255, 0, 31, 0, 0,
+    0, 0, 12, 0, 0, 255, 0, 255, 0, 0, 30, 0, 0,
+    0, 0, 13, 0, 0, 0, 255, 0, 0, 0, 29, 0, 0,
+    0, 0, 14, 0, 0, 255, 0, 255, 0, 0, 28, 0, 0,
+    0, 0, 15, 0, 255, 0, 0, 0, 255, 0, 27, 0, 0,
+    0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 26, 0, 0,
+    0, 0, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+void test_extend_row_with_constant()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t *>(img), 9);
+
+    gil::gray8c_view_t out_view =
+        gil::interleaved_view(9, 13, reinterpret_cast<const gil::gray8_pixel_t *>(row_output_constant), 9);
+
+    auto output = gil::extend_row(src_view, 2, gil::boundary_option::extend_constant);
+
+    BOOST_TEST(gil::equal_pixels(out_view, gil::view(output)));
+}
+
+void test_extend_row_with_zero()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t *>(img), 9);
+
+    gil::gray8c_view_t out_view =
+        gil::interleaved_view(9, 15, reinterpret_cast<const gil::gray8_pixel_t *>(row_output_zero), 9);
+
+    auto output = gil::extend_row(src_view, 3, gil::boundary_option::extend_zero);
+
+    BOOST_TEST(gil::equal_pixels(out_view, gil::view(output)));
+}
+
+void test_extend_row_with_padded()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t *>(img), 9);
+
+    auto src_sub_view = gil::subimage_view(src_view, 0, 1, 9, 7);
+
+    auto output = gil::extend_row(src_sub_view, 1, gil::boundary_option::extend_padded);
+
+    BOOST_TEST(gil::equal_pixels(src_view, gil::view(output)));
+}
+
+void test_extend_col_with_constant()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t *>(img), 9);
+
+    gil::gray8c_view_t out_view =
+        gil::interleaved_view(11, 9, reinterpret_cast<const gil::gray8_pixel_t *>(col_output_constant), 11);
+
+    auto output = gil::extend_col(src_view, 1, gil::boundary_option::extend_constant);
+
+    BOOST_TEST(gil::equal_pixels(out_view, gil::view(output)));
+}
+
+void test_extend_col_with_zero()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t *>(img), 9);
+
+    gil::gray8c_view_t out_view =
+        gil::interleaved_view(13, 9, reinterpret_cast<const gil::gray8_pixel_t *>(col_output_zero), 13);
+
+    auto output = gil::extend_col(src_view, 2, gil::boundary_option::extend_zero);
+
+    BOOST_TEST(gil::equal_pixels(out_view, gil::view(output)));
+}
+
+void test_extend_col_with_padded()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t *>(img), 9);
+
+    auto src_sub_view = gil::subimage_view(src_view, 1, 0, 7, 9);
+
+    auto output = gil::extend_col(src_sub_view, 1, gil::boundary_option::extend_padded);
+
+    BOOST_TEST(gil::equal_pixels(src_view, gil::view(output)));
+}
+
+void test_extend_img_with_constant()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t *>(img), 9);
+
+    gil::gray8c_view_t out_view =
+        gil::interleaved_view(13, 13, reinterpret_cast<const gil::gray8_pixel_t *>(boundary_output_constant), 13);
+
+    auto output = gil::extend_boundary(src_view, 2, gil::boundary_option::extend_constant);
+
+    BOOST_TEST(gil::equal_pixels(out_view, gil::view(output)));
+}
+
+void test_extend_img_with_zero()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t *>(img), 9);
+
+    gil::gray8c_view_t out_view =
+        gil::interleaved_view(13, 13, reinterpret_cast<const gil::gray8_pixel_t *>(boundary_output_zero), 13);
+
+    auto output = gil::extend_boundary(src_view, 2, gil::boundary_option::extend_zero);
+
+    BOOST_TEST(gil::equal_pixels(out_view, gil::view(output)));
+}
+
+void test_extend_img_with_padded()
+{
+    gil::gray8c_view_t src_view =
+        gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t *>(img), 9);
+
+    auto src_sub_view = gil::subimage_view(src_view, 1, 1, 7, 7);
+
+    auto output = gil::extend_boundary(src_sub_view, 1, gil::boundary_option::extend_padded);
+
+    BOOST_TEST(gil::equal_pixels(src_view, gil::view(output)));
+}
+
+int main()
+{
+    test_extend_row_with_constant();
+    test_extend_row_with_zero();
+    test_extend_row_with_padded();
+    test_extend_col_with_constant();
+    test_extend_col_with_zero();
+    test_extend_col_with_padded();
+    test_extend_img_with_constant();
+    test_extend_img_with_zero();
+    test_extend_img_with_padded();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/kernel.cpp b/src/boost/libs/gil/test/extension/numeric/kernel.cpp
new file mode 100644
index 000000000..c60e570a6
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/kernel.cpp
@@ -0,0 +1,174 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+// Copyright 2019 Miral Shah <miralshah2211@gmail.com>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#define BOOST_DISABLE_ASSERTS 1 // kernel_1d_adaptor assertions are too strict
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/kernel.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <vector>
+
+namespace gil = boost::gil;
+
+void test_kernel_1d_default_constructor()
+{
+    gil::kernel_1d<int> k;
+    BOOST_TEST_EQ(k.center(), 0);
+    BOOST_TEST_EQ(k.left_size(), 0);
+    BOOST_TEST_EQ(static_cast<int>(k.right_size()), -1);
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), 0);
+}
+
+void test_kernel_2d_default_constructor()
+{
+    gil::detail::kernel_2d<int> k;
+    BOOST_TEST_EQ(k.center_y(), 0);
+    BOOST_TEST_EQ(k.center_x(), 0);
+
+    //BOOST_TEST_EQ(k.left_size(), 0);
+    //BOOST_TEST_EQ(k.right_size(), -1);
+    BOOST_TEST_EQ(k.upper_size(), 0);
+    BOOST_TEST_EQ(static_cast<int>(k.lower_size()), -1);
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), 0);
+}
+
+void test_kernel_1d_parameterized_constructor()
+{
+    gil::kernel_1d<int> k(9, 4);
+    BOOST_TEST_EQ(k.center(), 4);
+    BOOST_TEST_EQ(k.left_size(), 4);
+    BOOST_TEST_EQ(k.right_size(), 4);
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), 9);
+}
+
+void test_kernel_2d_parameterized_constructor()
+{
+    gil::detail::kernel_2d<int> k(9, 4, 4);
+    BOOST_TEST_EQ(k.center_y(), 4);
+    BOOST_TEST_EQ(k.center_x(), 4);
+    BOOST_TEST_EQ(k.left_size(), 4);
+    BOOST_TEST_EQ(k.right_size(), 4);
+    BOOST_TEST_EQ(k.upper_size(), 4);
+    BOOST_TEST_EQ(k.lower_size(), 4);
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), 9);
+}
+
+void test_kernel_1d_parameterized_constructor_with_iterator()
+{
+    std::vector<int> v(9);
+    gil::kernel_1d<int> k(v.cbegin(), v.size(), 4);
+    BOOST_TEST_EQ(k.center(), 4);
+    BOOST_TEST_EQ(k.left_size(), 4);
+    BOOST_TEST_EQ(k.right_size(), 4);
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), 9);
+}
+
+void test_kernel_2d_parameterized_constructor_with_iterator()
+{
+    std::vector<int> v(81);
+    gil::detail::kernel_2d<int> k(v.cbegin(), v.size(), 4, 4);
+    BOOST_TEST_EQ(k.center_y(), 4);
+    BOOST_TEST_EQ(k.center_x(), 4);
+    BOOST_TEST_EQ(k.left_size(), 4);
+    BOOST_TEST_EQ(k.right_size(), 4);
+    BOOST_TEST_EQ(k.upper_size(), 4);
+    BOOST_TEST_EQ(k.lower_size(), 4);
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), 9);
+}
+
+void test_kernel_1d_copy_constructor()
+{
+    gil::kernel_1d<int> d(9, 4);
+    gil::kernel_1d<int> k(d);
+    BOOST_TEST_EQ(k.center(), 4);
+    BOOST_TEST_EQ(k.center(), d.center());
+    BOOST_TEST_EQ(k.left_size(), d.left_size());
+    BOOST_TEST_EQ(k.right_size(), d.right_size());
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), d.size());
+}
+
+void test_kernel_2d_copy_constructor()
+{
+    gil::detail::kernel_2d<int> d(9, 4, 4);
+    gil::detail::kernel_2d<int> k(d);
+    BOOST_TEST_EQ(k.center_y(), 4);
+    BOOST_TEST_EQ(k.center_x(), 4);
+    BOOST_TEST_EQ(k.center_y(), d.center_y());
+    BOOST_TEST_EQ(k.center_x(), d.center_x());
+    BOOST_TEST_EQ(k.left_size(), d.left_size());
+    BOOST_TEST_EQ(k.right_size(), d.right_size());
+    BOOST_TEST_EQ(k.lower_size(), d.lower_size());
+    BOOST_TEST_EQ(k.upper_size(), d.upper_size());
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), d.size());
+}
+
+void test_kernel_1d_assignment_operator()
+{
+    gil::kernel_1d<int> d(9, 4);
+    gil::kernel_1d<int> k;
+    k = d;
+    BOOST_TEST_EQ(k.center(), 4);
+    BOOST_TEST_EQ(k.center(), d.center());
+    BOOST_TEST_EQ(k.left_size(), d.left_size());
+    BOOST_TEST_EQ(k.right_size(), d.right_size());
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), d.size());
+}
+
+void test_kernel_2d_assignment_operator()
+{
+    gil::detail::kernel_2d<int> d(9, 4, 4);
+    gil::detail::kernel_2d<int> k;
+    k = d;
+    BOOST_TEST_EQ(k.center_y(), 4);
+    BOOST_TEST_EQ(k.center_x(), 4);
+    BOOST_TEST_EQ(k.center_y(), d.center_y());
+    BOOST_TEST_EQ(k.center_x(), d.center_x());
+    BOOST_TEST_EQ(k.left_size(), d.left_size());
+    BOOST_TEST_EQ(k.right_size(), d.right_size());
+    BOOST_TEST_EQ(k.lower_size(), d.lower_size());
+    BOOST_TEST_EQ(k.upper_size(), d.upper_size());
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), d.size());
+}
+
+void test_kernel_1d_reverse_kernel()
+{
+    gil::kernel_1d<int> d(12, 4);
+    BOOST_TEST_EQ(d.center(), 4);
+    auto k = gil::reverse_kernel(d);
+    BOOST_TEST_EQ(k.center(), d.right_size());
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), d.size());
+}
+
+int main()
+{
+    test_kernel_1d_default_constructor();
+    test_kernel_2d_default_constructor();
+    test_kernel_1d_parameterized_constructor();
+    test_kernel_2d_parameterized_constructor();
+    test_kernel_1d_parameterized_constructor_with_iterator();
+    test_kernel_2d_parameterized_constructor_with_iterator();
+    test_kernel_1d_copy_constructor();
+    test_kernel_2d_copy_constructor();
+    test_kernel_1d_assignment_operator();
+    test_kernel_2d_assignment_operator();
+    test_kernel_1d_reverse_kernel();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/kernel_1d_fixed_even_size_fail.cpp b/src/boost/libs/gil/test/extension/numeric/kernel_1d_fixed_even_size_fail.cpp
new file mode 100644
index 000000000..a8be85fcd
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/kernel_1d_fixed_even_size_fail.cpp
@@ -0,0 +1,16 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/extension/numeric/kernel.hpp>
+
+namespace gil = boost::gil;
+
+int main()
+{
+    gil::kernel_1d_fixed<int, 0> k0;
+    gil::kernel_1d_fixed<int, 4> k4;
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/kernel_fixed.cpp b/src/boost/libs/gil/test/extension/numeric/kernel_fixed.cpp
new file mode 100644
index 000000000..cfd075eaf
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/kernel_fixed.cpp
@@ -0,0 +1,183 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+// Copyright 2019 Miral Shah <miralshah2211@gmail.com>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#define BOOST_DISABLE_ASSERTS 1 // kernel_1d_adaptor assertions are too strict
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/kernel.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <vector>
+
+namespace gil = boost::gil;
+
+void test_kernel_1d_fixed_default_constructor()
+{
+    gil::kernel_1d_fixed<int, 9> k;
+    BOOST_TEST_EQ(k.center(), 0);
+    BOOST_TEST_EQ(k.left_size(), 0);
+    BOOST_TEST_EQ(k.right_size(), 8); // TODO: Why not 0 or -1 if not set?
+    // std::array interface
+    BOOST_TEST_EQ(k.size(), 9);
+}
+
+void test_kernel_2d_fixed_default_constructor()
+{
+    gil::detail::kernel_2d_fixed<int, 9> k;
+    BOOST_TEST_EQ(k.center_x(), 0);
+    BOOST_TEST_EQ(k.center_y(), 0);
+    BOOST_TEST_EQ(k.left_size(), 0);
+    BOOST_TEST_EQ(k.right_size(), 8); // TODO: Why not 0 or -1 if not set?
+    BOOST_TEST_EQ(k.upper_size(), 0);
+    BOOST_TEST_EQ(k.lower_size(), 8);
+    // std::array interface
+    BOOST_TEST_EQ(k.size(), 9);
+}
+
+void test_kernel_1d_fixed_parameterized_constructor()
+{
+    gil::kernel_1d_fixed<int, 9> k(4);
+    BOOST_TEST_EQ(k.center(), 4);
+    BOOST_TEST_EQ(k.left_size(), 4);
+    BOOST_TEST_EQ(k.right_size(), 4);
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), 9);
+}
+
+void test_kernel_2d_fixed_parameterized_constructor()
+{
+    gil::detail::kernel_2d_fixed<int, 9> k(4, 4);
+    BOOST_TEST_EQ(k.center_x(), 4);
+    BOOST_TEST_EQ(k.center_y(), 4);
+    BOOST_TEST_EQ(k.left_size(), 4);
+    BOOST_TEST_EQ(k.right_size(), 4);
+    BOOST_TEST_EQ(k.upper_size(), 4);
+    BOOST_TEST_EQ(k.lower_size(), 4);
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), 9);
+}
+
+void test_kernel_1d_fixed_parameterized_constructor_with_iterator()
+{
+    // FIXME: The constructor should throw if v.size() < k.size()
+    std::vector<int> v(9);
+    gil::kernel_1d_fixed<int, 9> k(v.cbegin(), 4);
+    BOOST_TEST_EQ((gil::kernel_1d_fixed<int, 9>::static_size), 9);
+    BOOST_TEST_EQ(k.center(), 4);
+    BOOST_TEST_EQ(k.left_size(), 4);
+    BOOST_TEST_EQ(k.right_size(), 4);
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), 9);
+}
+
+void test_kernel_2d_fixed_parameterized_constructor_with_iterator()
+{
+//    // FIXME: The constructor should throw if v.size() < k.size()
+    std::array<int, 81> v;
+    gil::detail::kernel_2d_fixed<int, 9> k(v.cbegin(), 4, 4);
+    BOOST_TEST_EQ((gil::detail::kernel_2d_fixed<int, 9>::static_size), 9);
+    BOOST_TEST_EQ(k.center_y(), 4);
+    BOOST_TEST_EQ(k.center_x(), 4);
+    BOOST_TEST_EQ(k.left_size(), 4);
+    BOOST_TEST_EQ(k.right_size(), 4);
+    BOOST_TEST_EQ(k.upper_size(), 4);
+    BOOST_TEST_EQ(k.lower_size(), 4);
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), 9);
+}
+
+void test_kernel_1d_fixed_copy_constructor()
+{
+    gil::kernel_1d_fixed<int, 9> d(4);
+    gil::kernel_1d_fixed<int, 9> k(d);
+    BOOST_TEST_EQ((gil::kernel_1d_fixed<int, 9>::static_size), 9);
+    BOOST_TEST_EQ(k.center(), 4);
+    BOOST_TEST_EQ(k.center(), d.center());
+    BOOST_TEST_EQ(k.left_size(), d.left_size());
+    BOOST_TEST_EQ(k.right_size(), d.right_size());
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), d.size());
+}
+
+void test_kernel_2d_fixed_copy_constructor()
+{
+    gil::detail::kernel_2d_fixed<int, 9> d(4, 4);
+    gil::detail::kernel_2d_fixed<int, 9> k(d);
+    BOOST_TEST_EQ((gil::detail::kernel_2d_fixed<int, 9>::static_size), 9);
+    BOOST_TEST_EQ(k.center_x(), 4);
+    BOOST_TEST_EQ(k.center_y(), 4);
+    BOOST_TEST_EQ(k.center_x(), d.center_x());
+    BOOST_TEST_EQ(k.center_y(), d.center_y());
+    BOOST_TEST_EQ(k.left_size(), d.left_size());
+    BOOST_TEST_EQ(k.right_size(), d.right_size());
+    BOOST_TEST_EQ(k.lower_size(), d.lower_size());
+    BOOST_TEST_EQ(k.upper_size(), d.upper_size());
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), d.size());
+}
+
+void test_kernel_1d_fixed_assignment_operator()
+{
+    gil::kernel_1d_fixed<int, 9> d(4);
+    gil::kernel_1d_fixed<int, 9> k;
+    k = d;
+    BOOST_TEST_EQ((gil::kernel_1d_fixed<int, 9>::static_size), 9);
+    BOOST_TEST_EQ(k.center(), 4);
+    BOOST_TEST_EQ(k.center(), d.center());
+    BOOST_TEST_EQ(k.left_size(), d.left_size());
+    BOOST_TEST_EQ(k.right_size(), d.right_size());
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), d.size());
+}
+
+void test_kernel_2d_fixed_assignment_operator()
+{
+    gil::detail::kernel_2d_fixed<int, 9> d(4, 4);
+    gil::detail::kernel_2d_fixed<int, 9> k;
+    k = d;
+    BOOST_TEST_EQ((gil::detail::kernel_2d_fixed<int, 9>::static_size), 9);
+    BOOST_TEST_EQ(k.center_x(), 4);
+    BOOST_TEST_EQ(k.center_y(), 4);
+    BOOST_TEST_EQ(k.center_x(), d.center_x());
+    BOOST_TEST_EQ(k.center_y(), d.center_y());
+    BOOST_TEST_EQ(k.left_size(), d.left_size());
+    BOOST_TEST_EQ(k.right_size(), d.right_size());
+    BOOST_TEST_EQ(k.lower_size(), d.lower_size());
+    BOOST_TEST_EQ(k.upper_size(), d.upper_size());
+    // std::vector interface
+    BOOST_TEST_EQ(k.size(), d.size());
+}
+
+void test_kernel_1d_fixed_reverse_kernel()
+{
+    std::array<int, 3> values = {{1, 2, 3}};
+    gil::kernel_1d_fixed<int, 3> k(values.begin(), 1);
+    BOOST_TEST_EQ((gil::kernel_1d_fixed<int, 3>::static_size), 3);
+    BOOST_TEST_ALL_EQ(k.begin(), k.end(), values.begin(), values.end());
+
+    std::array<int, 3> values_rev = {{3, 2, 1}};
+    auto const k_rev              = gil::reverse_kernel(k);
+    BOOST_TEST_ALL_EQ(k_rev.begin(), k_rev.end(), values_rev.begin(), values_rev.end());
+}
+
+int main()
+{
+    test_kernel_1d_fixed_default_constructor();
+    test_kernel_2d_fixed_default_constructor();
+    test_kernel_1d_fixed_parameterized_constructor();
+    test_kernel_2d_fixed_parameterized_constructor();
+    test_kernel_1d_fixed_parameterized_constructor_with_iterator();
+    test_kernel_2d_fixed_parameterized_constructor_with_iterator();
+    test_kernel_1d_fixed_copy_constructor();
+    test_kernel_2d_fixed_copy_constructor();
+    test_kernel_1d_fixed_assignment_operator();
+    test_kernel_2d_fixed_assignment_operator();
+    test_kernel_1d_fixed_reverse_kernel();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/matrix3x2.cpp b/src/boost/libs/gil/test/extension/numeric/matrix3x2.cpp
new file mode 100644
index 000000000..f1c19cd04
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/matrix3x2.cpp
@@ -0,0 +1,191 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/affine.hpp>
+#include <boost/gil/extension/numeric/resample.hpp>
+#include <boost/gil/extension/numeric/sampler.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cmath>
+
+namespace gil = boost::gil;
+
+// FIXME: Remove when https://github.com/boostorg/core/issues/38 happens
+#define BOOST_GIL_TEST_IS_CLOSE(a, b, epsilon) BOOST_TEST_LT(std::fabs((a) - (b)), (epsilon))
+
+namespace {
+constexpr double HALF_PI = 1.57079632679489661923;
+}
+
+void test_matrix3x2_default_constructor()
+{
+    gil::matrix3x2<int> m1;
+    BOOST_TEST_EQ(m1.a, 1);
+    BOOST_TEST_EQ(m1.b, 0);
+    BOOST_TEST_EQ(m1.c, 0);
+    BOOST_TEST_EQ(m1.d, 1);
+    BOOST_TEST_EQ(m1.e, 0);
+    BOOST_TEST_EQ(m1.f, 0);
+}
+
+void test_matrix3x2_parameterized_constructor()
+{
+    gil::matrix3x2<int> m1(1, 2, 3, 4, 5, 6);
+    BOOST_TEST_EQ(m1.a, 1);
+    BOOST_TEST_EQ(m1.b, 2);
+    BOOST_TEST_EQ(m1.c, 3);
+    BOOST_TEST_EQ(m1.d, 4);
+    BOOST_TEST_EQ(m1.e, 5);
+    BOOST_TEST_EQ(m1.f, 6);
+}
+
+void test_matrix3x2_copy_constructor()
+{
+    gil::matrix3x2<int> m1(1, 2, 3, 4, 5, 6);
+    gil::matrix3x2<int> m2(m1);
+    BOOST_TEST_EQ(m2.a, 1);
+    BOOST_TEST_EQ(m2.b, 2);
+    BOOST_TEST_EQ(m2.c, 3);
+    BOOST_TEST_EQ(m2.d, 4);
+    BOOST_TEST_EQ(m2.e, 5);
+    BOOST_TEST_EQ(m2.f, 6);
+}
+
+void test_matrix3x2_assignment_operator()
+{
+    gil::matrix3x2<int> m1(1, 2, 3, 4, 5, 6);
+    gil::matrix3x2<int> m2;
+    m2 = m1;
+    BOOST_TEST_EQ(m2.a, 1);
+    BOOST_TEST_EQ(m2.b, 2);
+    BOOST_TEST_EQ(m2.c, 3);
+    BOOST_TEST_EQ(m2.d, 4);
+    BOOST_TEST_EQ(m2.e, 5);
+    BOOST_TEST_EQ(m2.f, 6);
+}
+
+void test_matrix3x2_multiplication_assignment()
+{
+    gil::matrix3x2<int> m1;
+    gil::matrix3x2<int> m2;
+    m2 *= m1;
+    BOOST_TEST_EQ(m2.a, 1);
+    BOOST_TEST_EQ(m2.b, 0);
+    BOOST_TEST_EQ(m2.c, 0);
+    BOOST_TEST_EQ(m2.d, 1);
+    BOOST_TEST_EQ(m2.e, 0);
+    BOOST_TEST_EQ(m2.f, 0);
+
+    gil::matrix3x2<int> m3(0, 0, 0, 0, 0, 0);
+    m2 *= m3;
+    BOOST_TEST_EQ(m2.a, 0);
+    BOOST_TEST_EQ(m2.b, 0);
+    BOOST_TEST_EQ(m2.c, 0);
+    BOOST_TEST_EQ(m2.d, 0);
+    BOOST_TEST_EQ(m2.e, 0);
+    BOOST_TEST_EQ(m2.f, 0);
+}
+
+void test_matrix3x2_matrix3x2_multiplication()
+{
+    gil::matrix3x2<int> m1;
+    gil::matrix3x2<int> m2(0, 0, 0, 0, 0, 0);
+    gil::matrix3x2<int> m3;
+    m3 = m1 * m2;
+    BOOST_TEST_EQ(m3.a, 0);
+    BOOST_TEST_EQ(m3.b, 0);
+    BOOST_TEST_EQ(m3.c, 0);
+    BOOST_TEST_EQ(m3.d, 0);
+    BOOST_TEST_EQ(m3.e, 0);
+    BOOST_TEST_EQ(m3.f, 0);
+}
+
+void test_matrix3x2_vector_multiplication()
+{
+    gil::matrix3x2<int> m1;
+    gil::point<int> v1{2, 4};
+
+    gil::point<int> v2 = v1 * m1;
+    BOOST_TEST_EQ(v2.x, 2);
+    BOOST_TEST_EQ(v2.y, 4);
+
+    gil::point<int> v3 = gil::transform(m1, v1);
+    BOOST_TEST_EQ(v3.x, 2);
+    BOOST_TEST_EQ(v3.y, 4);
+}
+
+void test_matrix3x2_get_rotate()
+{
+    auto m1 = gil::matrix3x2<double>::get_rotate(HALF_PI);
+    BOOST_GIL_TEST_IS_CLOSE(m1.a, std::cos(HALF_PI), 0.03);
+    BOOST_TEST_EQ(m1.b, 1);
+    BOOST_TEST_EQ(m1.c, -1);
+    BOOST_GIL_TEST_IS_CLOSE(m1.d, std::cos(HALF_PI), 0.03);
+    BOOST_TEST_EQ(m1.e, 0);
+    BOOST_TEST_EQ(m1.f, 0);
+}
+
+void test_matrix3x2_get_scale()
+{
+    gil::matrix3x2<int> m1;
+    m1 = gil::matrix3x2<int>::get_scale(2);
+    BOOST_TEST_EQ(m1.a, 2);
+    BOOST_TEST_EQ(m1.b, 0);
+    BOOST_TEST_EQ(m1.c, 0);
+    BOOST_TEST_EQ(m1.d, 2);
+    BOOST_TEST_EQ(m1.e, 0);
+    BOOST_TEST_EQ(m1.f, 0);
+    m1 = gil::matrix3x2<int>::get_scale(2, 4);
+    BOOST_TEST_EQ(m1.a, 2);
+    BOOST_TEST_EQ(m1.d, 4);
+    m1 = gil::matrix3x2<int>::get_scale(gil::point<int>{4, 8});
+    BOOST_TEST_EQ(m1.a, 4);
+    BOOST_TEST_EQ(m1.d, 8);
+}
+
+void test_matrix3x2_get_translate()
+{
+    gil::matrix3x2<int> m1;
+    m1 = gil::matrix3x2<int>::get_translate(2, 4);
+    BOOST_TEST_EQ(m1.a, 1);
+    BOOST_TEST_EQ(m1.b, 0);
+    BOOST_TEST_EQ(m1.c, 0);
+    BOOST_TEST_EQ(m1.d, 1);
+    BOOST_TEST_EQ(m1.e, 2);
+    BOOST_TEST_EQ(m1.f, 4);
+    m1 = gil::matrix3x2<int>::get_translate(gil::point<int>{4, 8});
+    BOOST_TEST_EQ(m1.e, 4);
+    BOOST_TEST_EQ(m1.f, 8);
+}
+
+void test_matrix3x2_transform()
+{
+    gil::matrix3x2<int> m1;
+    gil::point<int> v1{2, 4};
+    gil::point<int> v2 = gil::transform(m1, v1);
+    BOOST_TEST_EQ(v2.x, 2);
+    BOOST_TEST_EQ(v2.y, 4);
+}
+
+int main()
+{
+    test_matrix3x2_default_constructor();
+    test_matrix3x2_parameterized_constructor();
+    test_matrix3x2_copy_constructor();
+    test_matrix3x2_assignment_operator();
+    test_matrix3x2_multiplication_assignment();
+    test_matrix3x2_matrix3x2_multiplication();
+    test_matrix3x2_vector_multiplication();
+    test_matrix3x2_get_rotate();
+    test_matrix3x2_get_scale();
+    test_matrix3x2_get_translate();
+    test_matrix3x2_transform();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/pixel_numeric_operations.cpp b/src/boost/libs/gil/test/extension/numeric/pixel_numeric_operations.cpp
new file mode 100644
index 000000000..5f18ebfbb
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/pixel_numeric_operations.cpp
@@ -0,0 +1,343 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/pixel_numeric_operations.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <tuple>
+#include <type_traits>
+
+#include "test_utility_output_stream.hpp"
+#include "core/test_fixture.hpp" // random_value
+#include "core/pixel/test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+struct test_plus_integer_same_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const&)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        gil::pixel_plus_t<pixel_t, pixel_t, pixel_t> f;
+        {
+            pixel_t p0;
+            gil::static_fill(p0, static_cast<channel_t>(0));
+            BOOST_TEST_EQ(f(p0, p0), p0);
+        }
+        {
+            pixel_t p1;
+            gil::static_fill(p1, static_cast<channel_t>(1));
+            pixel_t r2;
+            gil::static_fill(r2, static_cast<channel_t>(2));
+            BOOST_TEST_EQ(f(p1, p1), r2);
+        }
+        {
+            // Generates pixels with consecutive channel values: {1} or {1,2,3} or {1,2,3,4} etc.
+            fixture::consecutive_value<channel_t> g(1);
+            pixel_t p;
+            gil::static_generate(p, [&g]() { return g(); });
+            auto const r = f(p, p);
+            BOOST_TEST_NE(r, p);
+            BOOST_TEST_EQ(gil::at_c<0>(r), (gil::at_c<0>(p) + gil::at_c<0>(p)));
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_integer_types>(test_plus_integer_same_types{});
+    }
+};
+
+struct test_minus_integer_same_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const&)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        gil::pixel_minus_t<pixel_t, pixel_t, pixel_t> f;
+
+        pixel_t p0;
+        gil::static_fill(p0, static_cast<channel_t>(0));
+        BOOST_TEST_EQ(f(p0, p0), p0);
+        {
+            pixel_t p1, p2;
+            gil::static_fill(p1, static_cast<channel_t>(1));
+            gil::static_fill(p2, static_cast<channel_t>(2));
+            pixel_t r1;
+            gil::static_fill(r1, static_cast<channel_t>(1));
+            BOOST_TEST_EQ(f(p2, p1), r1);
+        }
+        {
+            // Generates pixels with consecutive channel values: {1} or {1,2,3} or {1,2,3,4} etc.
+            fixture::consecutive_value<channel_t> g(1);
+            pixel_t p;
+            gil::static_generate(p, [&g]() { return g(); });
+            BOOST_TEST_EQ(f(p, p), p0);
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_integer_types>(test_minus_integer_same_types{});
+    }
+};
+
+struct test_pixel_multiplies_scalar_integer_same_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const&)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        gil::pixel_multiplies_scalar_t<pixel_t, channel_t, pixel_t> f;
+
+        pixel_t p0;
+        gil::static_fill(p0, static_cast<channel_t>(0));
+        BOOST_TEST_EQ(f(p0, 0), p0);
+
+        {
+            pixel_t p1;
+            gil::static_fill(p1, static_cast<channel_t>(1));
+            BOOST_TEST_EQ(f(p1, 0), p0);
+            BOOST_TEST_EQ(f(p1, 1), p1);
+        }
+        {
+            // Generates pixels with consecutive channel values: {1} or {1,2,3} or {1,2,3,4} etc.
+            fixture::consecutive_value<channel_t> g(1);
+            pixel_t p;
+            gil::static_generate(p, [&g]() { return g(); });
+
+            // check first channel value is doubled
+            auto const r = f(p, 2);
+            BOOST_TEST_NE(r, p);
+            BOOST_TEST_EQ(gil::at_c<0>(r), (gil::at_c<0>(p) * 2));
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_integer_types>(test_pixel_multiplies_scalar_integer_same_types{});
+    }
+};
+
+struct test_pixel_multiply_integer_same_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const&)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        gil::pixel_multiply_t<pixel_t, pixel_t, pixel_t> f;
+
+        pixel_t p0;
+        gil::static_fill(p0, static_cast<channel_t>(0));
+        BOOST_TEST_EQ(f(p0, p0), p0);
+
+        pixel_t p1;
+        gil::static_fill(p1, static_cast<channel_t>(1));
+        BOOST_TEST_EQ(f(p1, p1), p1);
+
+        pixel_t p2;
+        gil::static_fill(p2, static_cast<channel_t>(2));
+        BOOST_TEST_EQ(f(p1, p2), p2);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_integer_types>(test_pixel_multiply_integer_same_types{});
+    }
+};
+
+struct test_pixel_divides_scalar_integer_same_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const&)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        gil::pixel_divides_scalar_t<pixel_t, channel_t, pixel_t> f;
+
+        pixel_t p0;
+        gil::static_fill(p0, static_cast<channel_t>(0));
+        BOOST_TEST_EQ(f(p0, 1), p0);
+
+        pixel_t p1;
+        gil::static_fill(p1, static_cast<channel_t>(1));
+        BOOST_TEST_EQ(f(p1, 1), p1);
+
+        pixel_t p2;
+        gil::static_fill(p2, static_cast<channel_t>(2));
+        BOOST_TEST_EQ(f(p2, 2), p1);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_integer_types>(test_pixel_divides_scalar_integer_same_types{});
+    }
+};
+
+struct test_pixel_divide_integer_same_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const&)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        gil::pixel_divide_t<pixel_t, pixel_t, pixel_t> f;
+
+        pixel_t p0;
+        gil::static_fill(p0, static_cast<channel_t>(0));
+        pixel_t p1;
+        gil::static_fill(p1, static_cast<channel_t>(1));
+        BOOST_TEST_EQ(f(p0, p1), p0);
+        BOOST_TEST_EQ(f(p1, p1), p1);
+
+        pixel_t p2;
+        gil::static_fill(p2, static_cast<channel_t>(2));
+        BOOST_TEST_EQ(f(p2, p1), p2);
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_integer_types>(test_pixel_divide_integer_same_types{});
+    }
+};
+
+struct test_pixel_halves_integer_same_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const&)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        gil::pixel_halves_t<pixel_t> f;
+
+        pixel_t p0;
+        gil::static_fill(p0, static_cast<channel_t>(0));
+        pixel_t p1;
+        gil::static_fill(p1, static_cast<channel_t>(1));
+
+        {
+            auto p = p0;
+            BOOST_TEST_EQ(f(p), p0);
+        }
+        {
+            auto p = p1;
+            BOOST_TEST_EQ(f(p), p0); // truncates toward Zero
+        }
+        {
+            pixel_t p2;
+            gil::static_fill(p2, static_cast<channel_t>(2));
+            BOOST_TEST_EQ(f(p2), p1);
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_integer_types>(test_pixel_halves_integer_same_types{});
+    }
+};
+
+struct test_pixel_zeros_integer_same_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const&)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        gil::pixel_zeros_t<pixel_t> f;
+
+        pixel_t p0;
+        gil::static_fill(p0, static_cast<channel_t>(0));
+        {
+            auto p = p0;
+            BOOST_TEST_EQ(f(p), p0);
+        }
+        {
+            fixture::consecutive_value<channel_t> g(1);
+            pixel_t p;
+            gil::static_generate(p, [&g]() { return g(); });
+            BOOST_TEST_EQ(f(p), p0);
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_integer_types>(test_pixel_zeros_integer_same_types{});
+    }
+};
+
+struct test_zero_channels_integer_same_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const&)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+
+        pixel_t p0;
+        gil::static_fill(p0, static_cast<channel_t>(0));
+        {
+            auto p = p0;
+            gil::zero_channels(p);
+            BOOST_TEST_EQ(p, p0);
+        }
+        {
+            fixture::consecutive_value<channel_t> g(1);
+            pixel_t p;
+            gil::static_generate(p, [&g]() { return g(); });
+            gil::zero_channels(p);
+            BOOST_TEST_EQ(p, p0);
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_integer_types>(test_zero_channels_integer_same_types{});
+    }
+};
+
+struct test_pixel_assigns_integer_same_types
+{
+    template <typename Pixel>
+    void operator()(Pixel const&)
+    {
+        using pixel_t = Pixel;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        gil::pixel_assigns_t<pixel_t, pixel_t> f;
+
+        {
+            pixel_t p0, r;
+            gil::static_fill(p0, static_cast<channel_t>(0));
+            f(p0, r);
+            BOOST_TEST_EQ(p0, r);
+        }
+        {
+            fixture::consecutive_value<channel_t> g(1);
+            pixel_t p, r;
+            gil::static_generate(p, [&g]() { return g(); });
+            f(p, r);
+            BOOST_TEST_EQ(p, r);
+        }
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::pixel_integer_types>(test_pixel_assigns_integer_same_types{});
+    }
+};
+int main()
+{
+    test_plus_integer_same_types::run();
+    test_minus_integer_same_types::run();
+    test_pixel_multiplies_scalar_integer_same_types::run();
+    test_pixel_multiply_integer_same_types::run();
+    test_pixel_divides_scalar_integer_same_types::run();
+    test_pixel_divide_integer_same_types::run();
+    test_pixel_halves_integer_same_types::run();
+    test_pixel_zeros_integer_same_types::run();
+    test_zero_channels_integer_same_types::run();
+    test_pixel_assigns_integer_same_types::run();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/pixel_numeric_operations_float.cpp b/src/boost/libs/gil/test/extension/numeric/pixel_numeric_operations_float.cpp
new file mode 100644
index 000000000..79caa7a75
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/pixel_numeric_operations_float.cpp
@@ -0,0 +1,97 @@
+//
+// Copyright 2013 Krzysztof Czainski
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/resample.hpp>
+#include <boost/gil/extension/numeric/sampler.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cmath>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+// FIXME: Remove when https://github.com/boostorg/core/issues/38 happens
+#define BOOST_GIL_TEST_IS_CLOSE(a, b, epsilon) BOOST_TEST_LT(std::fabs((a) - (b)), (epsilon))
+
+void test_plus()
+{
+    gil::rgb8_pixel_t a(10, 20, 30);
+    gil::bgr8_pixel_t b(30, 20, 10);
+
+    gil::pixel_plus_t<gil::rgb8_pixel_t, gil::bgr8_pixel_t, gil::rgb8_pixel_t> op;
+    gil::rgb8_pixel_t c = op(a, b);
+
+    BOOST_TEST_EQ(get_color(c, gil::red_t()), 20);
+    BOOST_TEST_EQ(get_color(c, gil::green_t()), 40);
+    BOOST_TEST_EQ(get_color(c, gil::blue_t()), 60);
+
+    gil::pixel_plus_t<gil::rgb8_pixel_t, gil::bgr8_pixel_t, gil::bgr8_pixel_t> op2;
+    gil::bgr8_pixel_t d = op2(a, b);
+
+    BOOST_TEST_EQ(get_color(d, gil::red_t()), 20);
+    BOOST_TEST_EQ(get_color(d, gil::green_t()), 40);
+    BOOST_TEST_EQ(get_color(d, gil::blue_t()), 60);
+}
+
+void test_multiply()
+{
+    gil::rgb32f_pixel_t a(1.f, 2.f, 3.f);
+    gil::bgr32f_pixel_t b(2.f, 2.f, 2.f);
+
+    gil::pixel_multiply_t<
+        gil::rgb32f_pixel_t, gil::bgr32f_pixel_t, gil::rgb32f_pixel_t>
+        op;
+    gil::rgb32f_pixel_t c = op(a, b);
+
+    float epsilon = 1e-6f;
+    BOOST_GIL_TEST_IS_CLOSE(get_color(c, gil::red_t()), 2.f, epsilon);
+    BOOST_GIL_TEST_IS_CLOSE(get_color(c, gil::green_t()), 4.f, epsilon);
+    BOOST_GIL_TEST_IS_CLOSE(get_color(c, gil::blue_t()), 6.f, epsilon);
+}
+
+void test_divide()
+{
+    // integer
+    {
+        gil::rgb8_pixel_t a(10, 20, 30);
+        gil::bgr8_pixel_t b(2, 2, 2);
+
+        gil::pixel_divide_t<gil::rgb8_pixel_t, gil::bgr8_pixel_t, gil::rgb8_pixel_t> op;
+        gil::rgb32f_pixel_t c = op(a, b);
+
+        BOOST_TEST_EQ(get_color(c, gil::red_t()), 5);
+        BOOST_TEST_EQ(get_color(c, gil::green_t()), 10);
+        BOOST_TEST_EQ(get_color(c, gil::blue_t()), 15);
+    }
+
+    // float
+    {
+        gil::rgb32f_pixel_t a(1.f, 2.f, 3.f);
+        gil::bgr32f_pixel_t b(2.f, 2.f, 2.f);
+
+        gil::pixel_divide_t<gil::rgb32f_pixel_t, gil::bgr32f_pixel_t, gil::rgb32f_pixel_t> op;
+        gil::rgb32f_pixel_t c = op(a, b);
+
+        float epsilon = 1e-6f;
+        BOOST_GIL_TEST_IS_CLOSE(get_color(c, gil::red_t()), 0.5f, epsilon);
+        BOOST_GIL_TEST_IS_CLOSE(get_color(c, gil::green_t()), 1.f, epsilon);
+        BOOST_GIL_TEST_IS_CLOSE(get_color(c, gil::blue_t()), 1.5f, epsilon);
+    }
+}
+
+int main()
+{
+    test_plus();
+    test_multiply();
+    test_divide();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/resample.cpp b/src/boost/libs/gil/test/extension/numeric/resample.cpp
new file mode 100644
index 000000000..fa8616253
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/resample.cpp
@@ -0,0 +1,103 @@
+//
+// Copyright 2013 Krzysztof Czainski
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/resample.hpp>
+#include <boost/gil/extension/numeric/sampler.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cmath>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+// FIXME: Remove when https://github.com/boostorg/core/issues/38 happens
+#define BOOST_GIL_TEST_IS_CLOSE(a, b, epsilon) BOOST_TEST_LT(std::fabs((a) - (b)), (epsilon))
+
+template <class F, class I>
+struct test_map_fn
+{
+    using point_t = gil::point<F>;
+    using result_type = point_t;
+    result_type operator()(gil::point<I> const &src) const
+    {
+        F x = static_cast<F>(src.x) - 0.5;
+        F y = static_cast<F>(src.y) - 0.5;
+        return {x, y};
+    }
+};
+
+namespace boost { namespace gil {
+
+// NOTE: I suggest this could be the default behavior:
+
+template <typename T>
+struct mapping_traits;
+
+template <class F, class I>
+struct mapping_traits<test_map_fn<F, I>>
+{
+    using result_type = typename test_map_fn<F, I>::result_type;
+};
+
+template <class F, class I>
+inline point<F> transform(test_map_fn<F, I> const &mf, point<I> const &src)
+{
+    return mf(src);
+}
+
+}} // namespace boost::gil
+
+void test_bilinear_sampler_test()
+{
+    // R G B
+    // G W R
+    // B R G
+    gil::rgb8_image_t img(3, 3);
+    gil::rgb8_view_t v = view(img);
+    v(0, 0) = v(1, 2) = v(2, 1) = gil::rgb8_pixel_t(128, 0, 0);
+    v(0, 1) = v(1, 0) = v(2, 2) = gil::rgb8_pixel_t(0, 128, 0);
+    v(0, 2) = v(2, 0) = gil::rgb8_pixel_t(0, 0, 128);
+    v(1, 1) = gil::rgb8_pixel_t(128, 128, 128);
+
+    gil::rgb8_image_t dims(4, 4);
+    gil::rgb8c_view_t dv = gil::const_view(dims);
+
+    test_map_fn<double, gil::rgb8_image_t::coord_t> mf;
+
+    gil::resample_pixels(gil::const_view(img), gil::view(dims), mf, gil::bilinear_sampler());
+
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(128, 0, 0), dv(0, 0));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(64, 64, 0), dv(0, 1));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(0, 64, 64), dv(0, 2));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(0, 0, 128), dv(0, 3));
+
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(64, 64, 0), dv(1, 0));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(64, 96, 32), dv(1, 1));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(64, 64, 64), dv(1, 2));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(64, 0, 64), dv(1, 3));
+
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(0, 64, 64), dv(2, 0));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(64, 64, 64), dv(2, 1));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(96, 64, 32), dv(2, 2));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(64, 64, 0), dv(2, 3));
+
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(0, 0, 128), dv(3, 0));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(64, 0, 64), dv(3, 1));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(64, 64, 0), dv(3, 2));
+    BOOST_TEST_EQ(gil::rgb8_pixel_t(0, 128, 0), dv(3, 3));
+}
+
+int main()
+{
+    test_bilinear_sampler_test();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/numeric/test_fixture.hpp b/src/boost/libs/gil/test/extension/numeric/test_fixture.hpp
new file mode 100644
index 000000000..bfd5cf6f2
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/numeric/test_fixture.hpp
@@ -0,0 +1,30 @@
+//
+// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/numeric/kernel.hpp>
+#include <boost/assert.hpp>
+
+#include <initializer_list>
+#include <type_traits>
+
+namespace boost { namespace gil {
+
+namespace test { namespace fixture {
+
+template <typename T>
+auto create_kernel(std::initializer_list<T> const& values)
+    -> gil::kernel_1d<T>
+{
+    static_assert(std::is_arithmetic<T>::value,
+        "kernel value type should be integral or floating-point type");
+    BOOST_ASSERT_MSG((values.size() - 1) % 2 == 0, "expected odd number of kernel values");
+    gil::kernel_1d<T> kernel(values.begin(), values.size(), (values.size() - 1) / 2);
+    return kernel;
+}
+
+}}}} // namespace boost::gil::test::fixture
diff --git a/src/boost/libs/gil/test/extension/toolbox/CMakeLists.txt b/src/boost/libs/gil/test/extension/toolbox/CMakeLists.txt
new file mode 100644
index 000000000..70df68db4
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/CMakeLists.txt
@@ -0,0 +1,64 @@
+#
+# Copyright (c) 2017 Mateusz Loskot <mateusz at loskot dot net>
+# All rights reserved.
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+message(STATUS "Boost.GIL: Configuring tests in test/extension/toolbox")
+
+foreach(_name
+  channel_type
+  channel_view
+  color_convert_cmyka
+  color_convert_gray
+  color_convert_gray_alpha
+  color_convert_hsl
+  color_convert_hsv
+  color_convert_lab
+  color_convert_luminance
+  color_convert_xyz
+  get_num_bits
+  get_pixel_type
+  is_bit_aligned
+  is_homogeneous
+  pixel_bit_size
+  subchroma_image)
+  set(_test t_ext_toolbox_${_name})
+  set(_target test_ext_toolbox_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name})
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
+
+# FIXME: https://github.com/boostorg/gil/issues/235
+foreach(_name
+  indexed_image)
+  set(_test t_ext_toolbox_${_name})
+  set(_target test_ext_toolbox_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name})
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/extension/toolbox/Jamfile b/src/boost/libs/gil/test/extension/toolbox/Jamfile
new file mode 100644
index 000000000..a68af63f3
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/Jamfile
@@ -0,0 +1,33 @@
+# Boost.GIL (Generic Image Library) - Toolbox tests
+#
+# Copyright (c) 2012 Christian Henning
+# Copyright (c) 2012-202 Mateusz Loskot <mateusz@loskot.net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+import testing ;
+
+alias headers : [ generate_self_contained_headers extension/toolbox ] ;
+
+compile channel_type.cpp ;
+compile get_num_bits.cpp ;
+compile get_pixel_type.cpp ;
+compile is_bit_aligned.cpp ;
+compile is_homogeneous.cpp ;
+compile pixel_bit_size.cpp ;
+
+run channel_view.cpp ;
+run color_convert_cmyka.cpp ;
+run color_convert_gray.cpp ;
+run color_convert_gray_alpha.cpp ;
+run color_convert_hsl.cpp ;
+run color_convert_hsv.cpp ;
+run color_convert_lab.cpp ;
+run color_convert_luminance.cpp ;
+run color_convert_xyz.cpp ;
+run indexed_image.cpp ;
+
+# TODO: Add subchroma_image.cpp after fixing run-time failure,
+#      for details see https://github.com/boostorg/gil/pull/164
+#run subchroma_image.cpp ;
diff --git a/src/boost/libs/gil/test/extension/toolbox/channel_type.cpp b/src/boost/libs/gil/test/extension/toolbox/channel_type.cpp
new file mode 100644
index 000000000..ac615dd69
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/channel_type.cpp
@@ -0,0 +1,42 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/extension/toolbox/metafunctions/channel_type.hpp>
+#include <boost/gil/extension/toolbox/metafunctions/is_bit_aligned.hpp>
+
+#include <boost/gil/channel.hpp>
+#include <boost/gil/detail/is_channel_integral.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+void test_channel_type()
+{
+    static_assert(std::is_same
+        <
+            unsigned char,
+            gil::channel_type<gil::rgb8_pixel_t>::type
+        >::value, "");
+
+    // float32_t is a scoped_channel_value object
+    static_assert(std::is_same
+        <
+            gil::float32_t,
+            gil::channel_type<gil::rgba32f_pixel_t>::type
+        >::value, "");
+
+    // channel_type for bit_aligned images doesn't work with standard gil.
+    using image_t = gil::bit_aligned_image4_type<4, 4, 4, 4, gil::rgb_layout_t>::type;
+    using channel_t = gil::channel_type<image_t::view_t::reference>::type;
+    static_assert(gil::detail::is_channel_integral<channel_t>::value, "");
+}
+
+int main()
+{
+    test_channel_type();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/channel_view.cpp b/src/boost/libs/gil/test/extension/toolbox/channel_view.cpp
new file mode 100644
index 000000000..e29de6d4b
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/channel_view.cpp
@@ -0,0 +1,44 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/metafunctions/channel_view.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+void test_channel_view()
+{
+    using kth_channel_view_t
+        = gil::kth_channel_view_type<0, gil::rgb8_view_t::const_t>::type;
+    using channel_view_t
+        = gil::channel_view_type<gil::red_t, gil::rgb8_view_t::const_t>::type;
+
+    static_assert(std::is_same
+        <
+            kth_channel_view_t,
+            channel_view_t
+        >::value,
+        "");
+
+    gil::rgb8_image_t img(100, 100);
+    kth_channel_view_t const kth0 = gil::kth_channel_view<0>(gil::const_view(img));
+    BOOST_TEST_EQ(kth0.num_channels(), 1u);
+
+    channel_view_t const red = gil::channel_view<gil::red_t>(gil::const_view(img));
+    BOOST_TEST_EQ(red.num_channels(), 1u);
+}
+
+int main()
+{
+    test_channel_view();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/color_convert_cmyka.cpp b/src/boost/libs/gil/test/extension/toolbox/color_convert_cmyka.cpp
new file mode 100644
index 000000000..1e7ff7cae
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/color_convert_cmyka.cpp
@@ -0,0 +1,32 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/color_spaces/cmyka.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+namespace gil = boost::gil;
+
+void test_cmyka_to_rgba()
+{
+    gil::cmyka8_pixel_t a(10, 20, 30, 40, 50);
+    gil::rgba8_pixel_t b;
+    gil::color_convert(a, b);
+
+    // TODO: no rgba to cmyka conversion implemented
+    //gil::cmyka8_pixel_t c;
+    //gil::color_convert( b, c );
+    //BOOST_ASSERT(gil::at_c<0>(a) == gil::at_c<0>(c));
+}
+
+int main()
+{
+    test_cmyka_to_rgba();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/color_convert_gray.cpp b/src/boost/libs/gil/test/extension/toolbox/color_convert_gray.cpp
new file mode 100644
index 000000000..e06b5d873
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/color_convert_gray.cpp
@@ -0,0 +1,30 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/color_converters/gray_to_rgba.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+void test_gray_to_rgba()
+{
+    gil::gray8_pixel_t a(45);
+    gil::rgba8_pixel_t b;
+    gil::color_convert(a, b);
+    BOOST_TEST_EQ(b, gil::rgba8_pixel_t(45, 45, 45, 255));
+}
+
+int main()
+{
+    test_gray_to_rgba();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/color_convert_gray_alpha.cpp b/src/boost/libs/gil/test/extension/toolbox/color_convert_gray_alpha.cpp
new file mode 100644
index 000000000..ac5b1662a
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/color_convert_gray_alpha.cpp
@@ -0,0 +1,49 @@
+//
+// Copyright 2013 Christian Henning
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/color_spaces/gray_alpha.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+void test_gray_alpha_to_gray()
+{
+    gil::gray_alpha8_pixel_t a(10, 20);
+    gil::gray8_pixel_t b;
+    gil::color_convert(a, b);
+    BOOST_TEST_EQ(b, gil::gray8_pixel_t(1));
+}
+
+void test_gray_alpha_to_rgb()
+{
+    gil::gray_alpha8_pixel_t a(10, 20);
+    gil::rgb8_pixel_t b;
+    gil::color_convert(a, b);
+    BOOST_TEST_EQ(b, gil::rgb8_pixel_t(1, 1, 1));
+}
+
+void test_gray_alpha_to_rgba()
+{
+    gil::gray_alpha8_pixel_t a(10, 20);
+    gil::rgba8_pixel_t b;
+    gil::color_convert(a, b);
+    BOOST_TEST_EQ(b, gil::rgba8_pixel_t(10, 10, 10, 20));
+}
+
+int main()
+{
+    test_gray_alpha_to_gray();
+    test_gray_alpha_to_rgb();
+    test_gray_alpha_to_rgba();
+
+    return boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/color_convert_hsl.cpp b/src/boost/libs/gil/test/extension/toolbox/color_convert_hsl.cpp
new file mode 100644
index 000000000..33c5c1962
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/color_convert_hsl.cpp
@@ -0,0 +1,87 @@
+//
+// Copyright 2013 Christian Henning
+// Copyright 2020 Mateusz Loskot <mateusz@loskot.net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/color_spaces/hsl.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+void test_rgb_to_hsl()
+{
+    gil::rgb8_pixel_t p{128, 0, 128};
+    gil::hsl32f_pixel_t h;
+    gil::color_convert(p, h);
+
+    BOOST_TEST_GT(gil::get_color(h, gil::hsl_color_space::hue_t()), 0.8);        // 0.83333331
+    BOOST_TEST_EQ(gil::get_color(h, gil::hsl_color_space::saturation_t()), 1.0); // 1.00000000
+    BOOST_TEST_GT(gil::get_color(h, gil::hsl_color_space::lightness_t()), 0.25); // 0.25098040
+}
+
+void test_hsl_to_rgb()
+{
+    gil::rgb8_pixel_t p(64, 0, 64);
+    gil::hsl32f_pixel_t h;
+    gil::color_convert(p, h);
+
+    gil::rgb8_pixel_t b;
+    gil::color_convert(h, b);
+    BOOST_TEST_EQ(b, p);
+}
+
+void test_image_assign_hsl()
+{
+    std::ptrdiff_t const w = 320;
+    std::ptrdiff_t const h = 240;
+    gil::hsl32f_image_t hsl_img(w, h);
+
+    for (std::ptrdiff_t y = 0; y < h; y++)
+    {
+        gil::hsl32f_view_t::x_iterator hsl_x_it = view(hsl_img).row_begin(y);
+        float v = static_cast<float>(h - y) / h;
+        for (std::ptrdiff_t x = 0; x < w; x++)
+        {
+            float const hue = (x + 1.f) / w;
+            gil::hsl32f_pixel_t const p(hue, 1.0, v);
+            hsl_x_it[x] = p;
+            BOOST_TEST_EQ(gil::view(hsl_img)(x, y), p);
+        }
+    }
+}
+
+void test_copy_pixels_rgb_to_hsl()
+{
+    gil::rgb8_image_t rgb_img(320, 240);
+    gil::rgb8_pixel_t rgb_pix(64, 32, 64);
+    gil::fill_pixels(view(rgb_img), rgb_pix);
+    gil::hsl32f_image_t hsl_img(view(rgb_img).dimensions());
+    gil::copy_pixels(gil::color_converted_view<gil::hsl32f_pixel_t>(view(rgb_img)), view(hsl_img));
+
+    auto view = gil::view(hsl_img);
+    for (auto it = view.begin(), end = view.end(); it != end; ++it)
+    {
+        gil::rgb8_pixel_t p;
+        gil::color_convert(*it, p);
+        BOOST_TEST_EQ(p, rgb_pix);
+    }
+}
+
+int main()
+{
+    test_rgb_to_hsl();
+    test_hsl_to_rgb();
+    test_image_assign_hsl();
+    test_copy_pixels_rgb_to_hsl();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/color_convert_hsv.cpp b/src/boost/libs/gil/test/extension/toolbox/color_convert_hsv.cpp
new file mode 100644
index 000000000..175a7d989
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/color_convert_hsv.cpp
@@ -0,0 +1,95 @@
+//
+// Copyright 2013 Christian Henning
+// Copyright 2020 Mateusz Loskot <mateusz@loskot.net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/color_spaces/hsv.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <iostream>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+void test_rgb_to_hsv()
+{
+    gil::rgb8_pixel_t p{128, 0, 128};
+    gil::hsv32f_pixel_t h;
+    gil::color_convert(p, h);
+
+    BOOST_TEST_GT(gil::get_color(h, gil::hsv_color_space::hue_t()), 0.80);       // 0.83333331
+    BOOST_TEST_LT(gil::get_color(h, gil::hsv_color_space::hue_t()), 0.85);
+    BOOST_TEST_GE(gil::get_color(h, gil::hsv_color_space::saturation_t()), 1.0); // 1.00000000
+    BOOST_TEST_LT(gil::get_color(h, gil::hsv_color_space::saturation_t()), 1.1);
+    BOOST_TEST_GE(gil::get_color(h, gil::hsv_color_space::value_t()), 0.50);     // 0.50196081
+    BOOST_TEST_LT(gil::get_color(h, gil::hsv_color_space::value_t()), 0.51);
+}
+
+void test_hsv_to_rgb()
+{
+    gil::rgb8_pixel_t p(128, 0, 128);
+    gil::hsv32f_pixel_t h;
+    gil::color_convert(p, h);
+
+    gil::rgb8_pixel_t b;
+    gil::color_convert(h, b);
+    BOOST_TEST_EQ(b, gil::rgb8_pixel_t(128, 0, 128));
+}
+
+
+void test_image_assign_hsv()
+{
+    std::ptrdiff_t const w = 320;
+    std::ptrdiff_t const h = 240;
+    gil::hsv32f_image_t hsv_img(w, h);
+
+    for (std::ptrdiff_t y = 0; y < h; y++)
+    {
+        gil::hsv32f_view_t::x_iterator hsv_x_it = view(hsv_img).row_begin(y);
+        float v = static_cast<float>(h - y) / h;
+        for (std::ptrdiff_t x = 0; x < w; x++)
+        {
+            float const hue = (x + 1.f) / w;
+            gil::hsv32f_pixel_t const p(hue, 1.0, v);
+            hsv_x_it[x] = p;
+            BOOST_TEST_EQ(gil::view(hsv_img)(x, y), p);
+        }
+    }
+}
+
+void test_copy_pixels_rgb_to_hsv()
+{
+    gil::rgb8_image_t rgb_img(320, 240);
+    gil::rgb8_pixel_t rgb_pix(64, 32, 64);
+    gil::fill_pixels(view(rgb_img), rgb_pix);
+    gil::hsv32f_image_t hsv_img(view(rgb_img).dimensions());
+    gil::copy_pixels(gil::color_converted_view<gil::hsv32f_pixel_t>(view(rgb_img)), view(hsv_img));
+
+    auto view = gil::view(hsv_img);
+    for (auto it = view.begin(), end = view.end(); it != end; ++it)
+    {
+        auto h = *it;
+        BOOST_TEST_GT(gil::get_color(h, gil::hsv_color_space::hue_t()), 0.80);       // 0.8333333
+        BOOST_TEST_LT(gil::get_color(h, gil::hsv_color_space::hue_t()), 0.85);
+        BOOST_TEST_GE(gil::get_color(h, gil::hsv_color_space::saturation_t()), 0.5); // 0.5000000
+        BOOST_TEST_LT(gil::get_color(h, gil::hsv_color_space::saturation_t()),  0.51);
+        BOOST_TEST_GT(gil::get_color(h, gil::hsv_color_space::value_t()), 0.25);     // 0.25
+        BOOST_TEST_LT(gil::get_color(h, gil::hsv_color_space::value_t()), 0.26);
+    }
+}
+
+int main()
+{
+    test_rgb_to_hsv();
+    test_hsv_to_rgb();
+    test_image_assign_hsv();
+    test_copy_pixels_rgb_to_hsv();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/color_convert_lab.cpp b/src/boost/libs/gil/test/extension/toolbox/color_convert_lab.cpp
new file mode 100644
index 000000000..0bd2f31dc
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/color_convert_lab.cpp
@@ -0,0 +1,140 @@
+//
+// Copyright 2013 Christian Henning
+// Copyright 2013 Davide Anastasia <davideanastasia@users.sourceforge.net>
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/color_spaces/lab.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cmath>
+
+namespace gil = boost::gil;
+
+// FIXME: Remove when https://github.com/boostorg/core/issues/38 happens
+#define BOOST_GIL_TEST_IS_CLOSE(a, b) BOOST_TEST_LT(std::fabs((a) - (b)), (0.0005f))
+
+void test_lab_to_xyz()
+{
+    {
+        gil::lab32f_pixel_t lab_pixel(40.366198f, 53.354489f, 26.117702f);
+        gil::xyz32f_pixel_t xyz_pixel;
+        gil::color_convert(lab_pixel, xyz_pixel);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(xyz_pixel[0]), 0.197823f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(xyz_pixel[1]), 0.114731f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(xyz_pixel[2]), 0.048848f);
+    }
+    {
+        gil::lab32f_pixel_t lab_pixel(50, 0, 0);
+        gil::xyz32f_pixel_t xyz_pixel;
+        gil::color_convert(lab_pixel, xyz_pixel);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(xyz_pixel[0]), 0.175064f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(xyz_pixel[1]), 0.184187f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(xyz_pixel[2]), 0.200548f);
+    }
+}
+
+void test_xyz_to_lab()
+{
+    gil::lab32f_pixel_t lab_pixel;
+    gil::xyz32f_pixel_t xyz_pixel(0.085703f, 0.064716f, 0.147082f);
+    gil::color_convert(xyz_pixel, lab_pixel);
+    BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[0]), 30.572438f);
+    BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[1]), 23.4674f);
+    BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[2]), -22.322275f);
+}
+
+void test_rgb_to_lab()
+{
+    {
+        gil::rgb32f_pixel_t rgb_pixel(0.75f, 0.5f, 0.25f);
+        gil::lab32f_pixel_t lab_pixel;
+        gil::color_convert(rgb_pixel, lab_pixel);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[0]), 58.7767f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[1]), 18.5851f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[2]), 43.7975f);
+    }
+    {
+        gil::rgb32f_pixel_t rgb_pixel(1.f, 0.f, 0.f);
+        gil::lab32f_pixel_t lab_pixel;
+        gil::color_convert(rgb_pixel, lab_pixel);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[0]), 53.2408f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[1]), 80.0925f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[2]), 67.2032f);
+    }
+    {
+        gil::rgb32f_pixel_t rgb_pixel(0.f, 1.f, 0.f);
+        gil::lab32f_pixel_t lab_pixel;
+        gil::color_convert(rgb_pixel, lab_pixel);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[0]), 87.7347f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[1]), -86.1827f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[2]), 83.1793f);
+    }
+    {
+        gil::rgb32f_pixel_t rgb_pixel(0.f, 0.f, 1.f);
+        gil::lab32f_pixel_t lab_pixel;
+        gil::color_convert(rgb_pixel, lab_pixel);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[0]), 32.2970f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[1]), 79.1875f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[2]), -107.8602f);
+    }
+    {
+        gil::rgb32f_pixel_t rgb_pixel(1.f, 1.f, 1.f);
+        gil::lab32f_pixel_t lab_pixel;
+        gil::color_convert(rgb_pixel, lab_pixel);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[0]), 100.f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[1]), 0.f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(lab_pixel[2]), 0.f);
+    }
+}
+
+void test_lab_to_rgb()
+{
+    {
+        gil::lab32f_pixel_t lab_pixel(75.f, 20.f, 40.f);
+        gil::rgb32f_pixel_t rgb_pixel;
+        gil::color_convert(lab_pixel, rgb_pixel);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[0]), 0.943240f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[1]), 0.663990f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[2]), 0.437893f);
+    }
+    {
+        gil::lab32f_pixel_t lab_pixel(100.f, 0.f, 0.f);
+        gil::rgb32f_pixel_t rgb_pixel;
+        gil::color_convert(lab_pixel, rgb_pixel);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[0]), 1.f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[1]), 1.f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[2]), 1.f);
+    }
+    {
+        gil::lab32f_pixel_t lab_pixel(56.8140f, -42.3665f, 10.6728f);
+        gil::rgb32f_pixel_t rgb_pixel;
+        gil::color_convert(lab_pixel, rgb_pixel);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[0]), 0.099999f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[1]), 0.605568f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[2]), 0.456662f);
+    }
+    {
+        gil::lab32f_pixel_t lab_pixel(50.5874f, 4.0347f, 50.5456f);
+        gil::rgb32f_pixel_t rgb_pixel;
+        gil::color_convert(lab_pixel, rgb_pixel);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[0]), 0.582705f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[1]), 0.454891f);
+        BOOST_GIL_TEST_IS_CLOSE(static_cast<float>(rgb_pixel[2]), 0.1f);
+    }
+}
+
+int main()
+{
+    test_lab_to_xyz();
+    test_xyz_to_lab();
+    test_rgb_to_lab();
+    test_lab_to_rgb();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/color_convert_luminance.cpp b/src/boost/libs/gil/test/extension/toolbox/color_convert_luminance.cpp
new file mode 100644
index 000000000..36851b6e3
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/color_convert_luminance.cpp
@@ -0,0 +1,38 @@
+//
+// Copyright 2013 Christian Henning
+// Copyright 2013 Davide Anastasia <davideanastasia@users.sourceforge.net>
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/color_converters/rgb_to_luminance.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+struct double_zero { static double apply() { return 0.0; } };
+struct double_one  { static double apply() { return 1.0; } };
+
+using gray64f_pixel_t = gil::pixel<double, gil::gray_layout_t>;
+using rgb64f_pixel_t = gil::pixel<double, gil::rgb_layout_t>;
+
+void test_rgb_to_luminance()
+{
+    rgb64f_pixel_t a(10, 20, 30);
+    gray64f_pixel_t b;
+    gil::color_convert(a, b);
+    BOOST_TEST_EQ(b, b);
+}
+
+int main()
+{
+    test_rgb_to_luminance();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/color_convert_xyz.cpp b/src/boost/libs/gil/test/extension/toolbox/color_convert_xyz.cpp
new file mode 100644
index 000000000..8121822d9
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/color_convert_xyz.cpp
@@ -0,0 +1,219 @@
+//
+// Copyright 2013 Christian Henning
+// Copyright 2013 Davide Anastasia <davideanastasia@users.sourceforge.net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/color_spaces/xyz.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+#include <limits>
+
+#ifndef BOOST_GIL_TEST_DEBUG_OSTREAM
+#include <iostream>
+#define BOOST_GIL_TEST_DEBUG_OSTREAM std::cout
+#endif
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+const float SKEW = 0.0001f;
+
+void test_rgb32f_xyz32f_1()
+{
+    gil::xyz32f_pixel_t xyz32f;
+    gil::rgb32f_pixel_t p32f(.934351f, 0.785446f, .105858f), p32f_b;
+    gil::color_convert(p32f, xyz32f);
+    gil::color_convert(xyz32f, p32f_b);
+
+    BOOST_GIL_TEST_DEBUG_OSTREAM
+        << p32f[0] << " "
+        << p32f[1] << " "
+        << p32f[2] << " -> "
+        << xyz32f[0] << " "
+        << xyz32f[1] << " "
+        << xyz32f[2] << " -> "
+        << p32f_b[0] << " "
+        << p32f_b[1] << " "
+        << p32f_b[2]
+        << '\n';
+
+    BOOST_TEST_LT(std::fabs(p32f[0] - p32f_b[0]), SKEW);
+    BOOST_TEST_LT(std::fabs(p32f[1] - p32f_b[1]), SKEW);
+    BOOST_TEST_LT(std::fabs(p32f[2] - p32f_b[2]), SKEW);
+    BOOST_TEST_LT(std::fabs(xyz32f[0] - 0.562669), SKEW);
+    BOOST_TEST_LT(std::fabs(xyz32f[1] - 0.597462), SKEW);
+    BOOST_TEST_LT(std::fabs(xyz32f[2] - 0.096050), SKEW);
+}
+
+void test_rgb32f_xyz32f_2()
+{
+    gil::xyz32f_pixel_t xyz32f;
+    gil::rgb32f_pixel_t p32f(.694617f, 0.173810f, 0.218710f), p32f_b;
+    gil::color_convert(p32f, xyz32f);
+    gil::color_convert(xyz32f, p32f_b);
+
+    BOOST_GIL_TEST_DEBUG_OSTREAM
+        << p32f[0] << " "
+        << p32f[1] << " "
+        << p32f[2] << " -> "
+        << xyz32f[0] << " "
+        << xyz32f[1] << " "
+        << xyz32f[2] << " -> "
+        << p32f_b[0] << " "
+        << p32f_b[1] << " "
+        << p32f_b[2]
+        << '\n';
+
+    BOOST_TEST_LT(std::fabs(p32f[0] - p32f_b[0]), SKEW);
+    BOOST_TEST_LT(std::fabs(p32f[1] - p32f_b[1]), SKEW);
+    BOOST_TEST_LT(std::fabs(p32f[2] - p32f_b[2]), SKEW);
+    BOOST_TEST_LT(std::fabs(xyz32f[0] - 0.197823), SKEW);
+    BOOST_TEST_LT(std::fabs(xyz32f[1] - 0.114731), SKEW);
+    BOOST_TEST_LT(std::fabs(xyz32f[2] - 0.048848), SKEW);
+}
+
+void test_xyz32f_rgb32f_1()
+{
+    gil::xyz32f_pixel_t xyz32f(.332634f, .436288f, .109853f), xyz32f_b;
+    gil::rgb32f_pixel_t p32f;
+    gil::color_convert(xyz32f, p32f);
+    gil::color_convert(p32f, xyz32f_b);
+
+    BOOST_GIL_TEST_DEBUG_OSTREAM
+        << xyz32f[0] << " "
+        << xyz32f[1] << " "
+        << xyz32f[2] << " -> "
+        << p32f[0] << " "
+        << p32f[1] << " "
+        << p32f[2] << " -> "
+        << xyz32f_b[0] << " "
+        << xyz32f_b[1] << " "
+        << xyz32f_b[2]
+        << '\n';
+
+    BOOST_TEST_LT(std::fabs(xyz32f_b[0] - xyz32f[0]), SKEW);
+    BOOST_TEST_LT(std::fabs(xyz32f_b[1] - xyz32f[1]), SKEW);
+    BOOST_TEST_LT(std::fabs(xyz32f_b[2] - xyz32f[2]), SKEW);
+    BOOST_TEST_LT(std::fabs(p32f[0] - 0.628242), SKEW);
+    BOOST_TEST_LT(std::fabs(p32f[1] - 0.735771), SKEW);
+    BOOST_TEST_LT(std::fabs(p32f[2] - 0.236473), SKEW);
+}
+
+void test_xyz32f_rgb32f_2()
+{
+    gil::xyz32f_pixel_t xyz32f(.375155f, .352705f, .260025f), xyz32f_b;
+    gil::rgb32f_pixel_t p32f;
+    gil::color_convert(xyz32f, p32f);
+    gil::color_convert(p32f, xyz32f_b);
+
+    BOOST_GIL_TEST_DEBUG_OSTREAM
+        << xyz32f[0] << " "
+        << xyz32f[1] << " "
+        << xyz32f[2] << " -> "
+        << p32f[0] << " "
+        << p32f[1] << " "
+        << p32f[2] << " -> "
+        << xyz32f_b[0] << " "
+        << xyz32f_b[1] << " "
+        << xyz32f_b[2]
+        << '\n';
+
+    BOOST_TEST_LT(std::fabs(xyz32f_b[0] - xyz32f[0]), SKEW);
+    BOOST_TEST_LT(std::fabs(xyz32f_b[1] - xyz32f[1]), SKEW);
+    BOOST_TEST_LT(std::fabs(xyz32f_b[2] - xyz32f[2]), SKEW);
+    BOOST_TEST_LT(std::fabs(p32f[0] - 0.763580), SKEW);
+    BOOST_TEST_LT(std::fabs(p32f[1] - 0.591622), SKEW);
+    BOOST_TEST_LT(std::fabs(p32f[2] - 0.510392), SKEW);
+}
+
+void test_rgb8u_xyz32f_1()
+{
+    gil::xyz32f_pixel_t xyz32f;
+    gil::rgb8_pixel_t p8u(177, 44, 56), p8u_b;
+    gil::color_convert(p8u, xyz32f);
+    gil::color_convert(xyz32f, p8u_b);
+
+    BOOST_GIL_TEST_DEBUG_OSTREAM
+        << static_cast<int>(p8u[0]) << " "
+        << static_cast<int>(p8u[1]) << " "
+        << static_cast<int>(p8u[2]) << " -> "
+        << xyz32f[0] << " "
+        << xyz32f[1] << " "
+        << xyz32f[2] << " -> "
+        << static_cast<int>(p8u_b[0]) << " "
+        << static_cast<int>(p8u_b[1]) << " "
+        << static_cast<int>(p8u_b[2])
+        << '\n';
+
+    BOOST_TEST_EQ(p8u[0], p8u_b[0]);
+    BOOST_TEST_EQ(p8u[1], p8u_b[1]);
+    BOOST_TEST_EQ(p8u[2], p8u_b[2]);
+}
+
+void test_rgb8u_xyz32f_2()
+{
+    gil::xyz32f_pixel_t xyz32f;
+    gil::rgb8_pixel_t p8u(72, 90, 165), p8u_b;
+    gil::color_convert(p8u, xyz32f);
+    gil::color_convert(xyz32f, p8u_b);
+
+    BOOST_GIL_TEST_DEBUG_OSTREAM
+        << static_cast<int>(p8u[0]) << " "
+        << static_cast<int>(p8u[1]) << " "
+        << static_cast<int>(p8u[2]) << " -> "
+        << xyz32f[0] << " "
+        << xyz32f[1] << " "
+        << xyz32f[2] << " -> "
+        << static_cast<int>(p8u_b[0]) << " "
+        << static_cast<int>(p8u_b[1]) << " "
+        << static_cast<int>(p8u_b[2])
+        << '\n';
+
+    BOOST_TEST_EQ(p8u[0], p8u_b[0]);
+    BOOST_TEST_EQ(p8u[1], p8u_b[1]);
+    BOOST_TEST_EQ(p8u[2], p8u_b[2]);
+}
+
+void test_rgb16u_xyz32f_1()
+{
+    gil::xyz32f_pixel_t xyz32f;
+    gil::rgb16_pixel_t p16u(12564, 20657, 200), p16u_b;
+    gil::color_convert(p16u, xyz32f);
+    gil::color_convert(xyz32f, p16u_b);
+
+    BOOST_GIL_TEST_DEBUG_OSTREAM
+        << static_cast<int>(p16u[0]) << " "
+        << static_cast<int>(p16u[1]) << " "
+        << static_cast<int>(p16u[2]) << " -> "
+        << xyz32f[0] << " "
+        << xyz32f[1] << " "
+        << xyz32f[2] << " -> "
+        << static_cast<int>(p16u_b[0]) << " "
+        << static_cast<int>(p16u_b[1]) << " "
+        << static_cast<int>(p16u_b[2])
+        << '\n';
+
+    BOOST_TEST_EQ(p16u[0], p16u_b[0]);
+    BOOST_TEST_EQ(p16u[1], p16u_b[1]);
+    BOOST_TEST_EQ(p16u[2], p16u_b[2]);
+}
+
+int main()
+{
+    test_rgb32f_xyz32f_1();
+    test_rgb32f_xyz32f_2();
+    test_xyz32f_rgb32f_1();
+    test_xyz32f_rgb32f_2();
+    test_rgb8u_xyz32f_1();
+    test_rgb8u_xyz32f_2();
+    test_rgb16u_xyz32f_1();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/get_num_bits.cpp b/src/boost/libs/gil/test/extension/toolbox/get_num_bits.cpp
new file mode 100644
index 000000000..84234eb83
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/get_num_bits.cpp
@@ -0,0 +1,41 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/metafunctions/channel_type.hpp>
+#include <boost/gil/extension/toolbox/metafunctions/get_num_bits.hpp>
+
+namespace gil = boost::gil;
+
+void test_get_num_bits()
+{
+    using image_t = gil::bit_aligned_image4_type<4, 4, 4, 4, gil::rgb_layout_t>::type;
+
+    using channel_t = gil::channel_type<image_t::view_t::reference>::type;
+    static_assert(gil::get_num_bits<channel_t>::value == 4, "");
+
+    using const_channel_t = gil::channel_type<image_t::const_view_t::reference>::type;
+    static_assert(gil::get_num_bits<const_channel_t>::value == 4, "");
+
+    using bits_t = gil::packed_channel_value<23>;
+    static_assert(gil::get_num_bits<bits_t>::value == 23, "");
+    static_assert(gil::get_num_bits<bits_t const>::value == 23, "");
+
+    static_assert(gil::get_num_bits<unsigned char >::value == 8, "");
+    static_assert(gil::get_num_bits<unsigned char const>::value == 8, "");
+
+    using gray8_channel_t = gil::channel_type<gil::gray8_image_t::view_t::value_type>::type;
+    static_assert(gil::get_num_bits<gray8_channel_t>::value == 8, "");
+
+    using rgba32_channel_t = gil::channel_type<gil::rgba32_image_t::view_t::value_type>::type;
+    static_assert(gil::get_num_bits<rgba32_channel_t>::value == 32, "");
+}
+
+int main()
+{
+    test_get_num_bits();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/get_pixel_type.cpp b/src/boost/libs/gil/test/extension/toolbox/get_pixel_type.cpp
new file mode 100644
index 000000000..720197b1f
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/get_pixel_type.cpp
@@ -0,0 +1,39 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/metafunctions/get_pixel_type.hpp>
+
+#include <type_traits>
+
+namespace gil = boost::gil;
+
+void test_bit_aligned_image()
+{
+    using image_t = gil::bit_aligned_image3_type<4, 15, 4, gil::rgb_layout_t>::type;
+    static_assert(std::is_same
+        <
+            gil::get_pixel_type<image_t::view_t>::type,
+            image_t::view_t::reference
+        >::value, "");
+}
+
+void test_rgb8_image()
+{
+    using image_t = gil::rgb8_image_t;
+    static_assert(std::is_same
+        <
+            gil::get_pixel_type<image_t::view_t>::type,
+            image_t::view_t::value_type
+        >::value, "");
+}
+
+int main()
+{
+    test_bit_aligned_image();
+    test_rgb8_image();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/indexed_image.cpp b/src/boost/libs/gil/test/extension/toolbox/indexed_image.cpp
new file mode 100644
index 000000000..5e78fa23f
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/indexed_image.cpp
@@ -0,0 +1,154 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/image_types/indexed_image.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstdint>
+
+#include "test_utility_output_stream.hpp"
+
+namespace gil = boost::gil;
+
+void test_index_image()
+{
+    auto const pixel_generator = []() -> gil::rgb8_pixel_t {
+        static int i = 0;
+        i = (i > 255) ? 0 : (i + 1);
+        auto const i8 = static_cast<std::uint8_t>(i);
+        return gil::rgb8_pixel_t(i8, i8, i8);
+    };
+
+    {
+        gil::indexed_image<std::uint8_t, gil::rgb8_pixel_t> img(640, 480);
+        gil::fill_pixels(gil::view(img), gil::rgb8_pixel_t(255, 0, 0));
+
+        gil::rgb8_pixel_t const p = *gil::view(img).xy_at(10, 10);
+        BOOST_TEST_EQ(p[0], 255);
+    }
+    {
+        using image_t = gil::indexed_image<gil::gray8_pixel_t, gil::rgb8_pixel_t>;
+        image_t img(640, 480, 256);
+
+        gil::generate_pixels(img.get_indices_view(), []() -> gil::gray8_pixel_t {
+            static int i = 0;
+            i = (i > 255) ? 0 : (i + 1);
+            auto const i8 = static_cast<std::uint8_t>(i);
+            return gil::gray8_pixel_t(i8);
+        });
+        gil::generate_pixels(img.get_palette_view(), pixel_generator);
+
+        gil::gray8_pixel_t index{0};
+        index = *img.get_indices_view().xy_at(0, 0); // verify values along first row
+        BOOST_TEST_EQ(static_cast<int>(index), (0 + 1));
+        index = *img.get_indices_view().xy_at(128, 0);
+        BOOST_TEST_EQ(static_cast<int>(index), (128 + 1));
+        // verify wrapping of value by the pixels generator above
+        index = *img.get_indices_view().xy_at(255, 0);
+        BOOST_TEST_EQ(static_cast<int>(index), 0);
+
+        // access via member function
+        gil::rgb8_pixel_t const pixel1 = *img.get_palette_view().xy_at(index, 0);
+        BOOST_TEST_EQ(pixel1[0], pixel1[1]);
+        BOOST_TEST_EQ(pixel1[1], pixel1[2]);
+
+        // access via free function
+        gil::rgb8_pixel_t const pixel2 = *gil::view(img).xy_at(10, 1);
+        BOOST_TEST_EQ(pixel2[0], pixel2[1]);
+        BOOST_TEST_EQ(pixel2[1], pixel2[2]);
+    }
+    {
+        using image_t = gil::indexed_image<gil::gray8_pixel_t, gil::rgb8_pixel_t>;
+        image_t img(640, 480, 256);
+
+        gil::generate_pixels(img.get_indices_view(), []() -> uint8_t
+            {
+                static int i = 0;
+                i = (i > 255) ? 0 : (i + 1);
+                return static_cast<std::uint8_t>(i);
+            });
+        gil::generate_pixels(img.get_palette_view(), pixel_generator);
+
+        std::uint8_t index = *img.get_indices_view().xy_at(128, 0);
+        BOOST_TEST_EQ(static_cast<int>(index), (128 + 1));
+
+        gil::rgb8_pixel_t const pixel1 = *img.get_palette_view().xy_at(index, 0);
+        BOOST_TEST_EQ(pixel1[0], pixel1[1]);
+        BOOST_TEST_EQ(pixel1[1], pixel1[2]);
+
+        gil::rgb8_pixel_t const pixel2 = *view(img).xy_at(10, 1);
+        BOOST_TEST_EQ(pixel2[0], pixel2[1]);
+        BOOST_TEST_EQ(pixel2[1], pixel2[2]);
+    }
+    {
+        using image_t = gil::indexed_image<std::uint8_t, gil::rgb8_pixel_t>;
+        image_t img(640, 480, 256);
+
+        for (image_t::y_coord_t y = 0; y < gil::view(img).height(); ++y)
+        {
+            image_t::view_t::x_iterator it = gil::view(img).row_begin(y);
+            for (image_t::x_coord_t x = 0; x < gil::view(img).width(); ++x)
+            {
+                gil::rgb8_pixel_t p = *it;
+                boost::ignore_unused(p);
+                it++;
+            }
+        }
+
+        // TODO: No checks? ~mloskot
+    }
+}
+
+void test_index_image_view()
+{
+    // generate some data
+    std::size_t const width = 640;
+    std::size_t const height = 480;
+    std::size_t const num_colors = 3;
+    std::uint8_t const index = 2;
+
+    // indices
+    std::vector<std::uint8_t> indices(width * height, index);
+
+    // colors
+    std::vector<gil::rgb8_pixel_t> palette(num_colors);
+    palette[0] = gil::rgb8_pixel_t(10, 20, 30);
+    palette[1] = gil::rgb8_pixel_t(40, 50, 60);
+    palette[2] = gil::rgb8_pixel_t(70, 80, 90);
+
+    // create image views from raw memory
+    auto indices_view = gil::interleaved_view(width, height,
+        (gil::gray8_image_t::view_t::x_iterator) indices.data(),
+        width); // row size in bytes
+
+    auto palette_view = gil::interleaved_view(100, 1,
+        (gil::rgb8_image_t::view_t::x_iterator) palette.data(),
+        num_colors * 3); // row size in bytes
+
+    auto ii_view = gil::view(indices_view, palette_view);
+
+    auto p = ii_view(gil::point_t(0, 0));
+    auto q = *ii_view.at(gil::point_t(0, 0));
+
+    BOOST_TEST_EQ(gil::get_color(p, gil::red_t()), 70);
+    BOOST_TEST_EQ(gil::get_color(p, gil::green_t()), 80);
+    BOOST_TEST_EQ(gil::get_color(p, gil::blue_t()), 90);
+
+    BOOST_TEST_EQ(gil::get_color(q, gil::red_t()), 70);
+    BOOST_TEST_EQ(gil::get_color(q, gil::green_t()), 80);
+    BOOST_TEST_EQ(gil::get_color(q, gil::blue_t()), 90);
+}
+
+int main()
+{
+    test_index_image();
+    test_index_image_view();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/is_bit_aligned.cpp b/src/boost/libs/gil/test/extension/toolbox/is_bit_aligned.cpp
new file mode 100644
index 000000000..2c4cd9c79
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/is_bit_aligned.cpp
@@ -0,0 +1,24 @@
+//
+// Copyright 2013 Christian Henning
+// Copyright 2020 Mateusz Loskot <mateusz@loskot.net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/metafunctions/is_bit_aligned.hpp>
+
+namespace gil = boost::gil;
+
+void test_is_bit_aligned()
+{
+    using image_t = gil::bit_aligned_image1_type< 4, gil::gray_layout_t>::type;
+    static_assert(gil::is_bit_aligned<image_t::view_t::value_type>::value, "");
+}
+
+int main()
+{
+    test_is_bit_aligned();
+}
+
diff --git a/src/boost/libs/gil/test/extension/toolbox/is_homogeneous.cpp b/src/boost/libs/gil/test/extension/toolbox/is_homogeneous.cpp
new file mode 100644
index 000000000..09615fe2f
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/is_homogeneous.cpp
@@ -0,0 +1,26 @@
+//
+// Copyright 2013 Christian Henning
+// Copyright 2020 Mateusz Loskot <mateusz@loskot.net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/metafunctions/is_homogeneous.hpp>
+
+namespace gil = boost::gil;
+
+void test_is_homogeneous()
+{
+    static_assert(gil::is_homogeneous<gil::rgb8_pixel_t>::value, "");
+    static_assert(gil::is_homogeneous<gil::cmyk16c_planar_ref_t>::value, "");
+
+    using image_t = gil::bit_aligned_image1_type< 4, gil::gray_layout_t>::type;
+    static_assert(gil::is_homogeneous<image_t::view_t::reference>::value, "");
+}
+
+int main()
+{
+    test_is_homogeneous();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/pixel_bit_size.cpp b/src/boost/libs/gil/test/extension/toolbox/pixel_bit_size.cpp
new file mode 100644
index 000000000..bbd8e3920
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/pixel_bit_size.cpp
@@ -0,0 +1,26 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/metafunctions.hpp>
+#include <boost/gil/extension/toolbox/metafunctions/pixel_bit_size.hpp>
+
+namespace gil = boost::gil;
+
+void test_pixel_bit_size()
+{
+    using image_t = gil::bit_aligned_image5_type
+        <
+            16, 16, 16, 8, 8, gil::devicen_layout_t<5>
+        >::type;
+    static_assert(gil::pixel_bit_size<image_t::view_t::reference>::value == 64, "");
+}
+
+int main()
+{
+    test_pixel_bit_size();
+}
diff --git a/src/boost/libs/gil/test/extension/toolbox/subchroma_image.cpp b/src/boost/libs/gil/test/extension/toolbox/subchroma_image.cpp
new file mode 100644
index 000000000..1ec43fcbf
--- /dev/null
+++ b/src/boost/libs/gil/test/extension/toolbox/subchroma_image.cpp
@@ -0,0 +1,106 @@
+//
+// Copyright 2013 Christian Henning
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+#include <boost/gil/extension/toolbox/color_spaces/ycbcr.hpp>
+#include <boost/gil/extension/toolbox/image_types/subchroma_image.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+#include <boost/mp11.hpp>
+
+#include <vector>
+
+namespace gil = boost::gil;
+namespace mp11 = boost::mp11;
+
+void test_subchroma_image()
+{
+    {
+        gil::ycbcr_601_8_pixel_t a(10, 20, 30);
+        gil::rgb8_pixel_t b;
+        gil::bgr8_pixel_t c;
+
+        gil::color_convert(a, b);
+        gil::color_convert(a, c);
+        BOOST_TEST(gil::static_equal(b, c));
+
+        gil::color_convert(b, a);
+    }
+    {
+        gil::ycbcr_709_8_pixel_t a(10, 20, 30);
+        gil::rgb8_pixel_t b;
+        gil::bgr8_pixel_t c;
+
+        gil::color_convert(a, b);
+        gil::color_convert(a, c);
+        BOOST_TEST(gil::static_equal(b, c));
+
+        gil::color_convert(b, a);
+    }
+
+    {
+        using pixel_t = gil::rgb8_pixel_t;
+        using image_t = gil::subchroma_image<pixel_t>;
+        image_t img(320, 240);
+        gil::fill_pixels(view(img), pixel_t(10, 20, 30));
+
+        // TODO: Add BOOST_TEST checkpoints
+    }
+    {
+        using pixel_t = gil::rgb8_pixel_t;
+
+        gil::subchroma_image<pixel_t, mp11::mp_list_c<int, 4, 4, 4>> a(640, 480);
+        static_assert(a.ss_X == 1 && a.ss_Y == 1, "");
+        gil::subchroma_image<pixel_t, mp11::mp_list_c<int, 4, 4, 0>> b(640, 480);
+        static_assert(b.ss_X == 1 && b.ss_Y == 2, "");
+        gil::subchroma_image<pixel_t, mp11::mp_list_c<int, 4, 2, 2>> c(640, 480);
+        static_assert(c.ss_X == 2 && c.ss_Y == 1, "");
+        gil::subchroma_image<pixel_t, mp11::mp_list_c<int, 4, 2, 0>> d(640, 480);
+        static_assert(d.ss_X == 2 && d.ss_Y == 2, "");
+        gil::subchroma_image<pixel_t, mp11::mp_list_c<int, 4, 1, 1>> e(640, 480);
+        static_assert(e.ss_X == 4 && e.ss_Y == 1, "");
+        gil::subchroma_image<pixel_t, mp11::mp_list_c<int, 4, 1, 0>> f(640, 480);
+        static_assert(f.ss_X == 4 && f.ss_Y == 2, "");
+
+        gil::fill_pixels(view(a), pixel_t(10, 20, 30));
+        gil::fill_pixels(view(b), pixel_t(10, 20, 30));
+        gil::fill_pixels(view(c), pixel_t(10, 20, 30));
+        gil::fill_pixels(view(d), pixel_t(10, 20, 30));
+        gil::fill_pixels(view(e), pixel_t(10, 20, 30));
+        gil::fill_pixels(view(f), pixel_t(10, 20, 30));
+
+        // TODO: Add BOOST_TEST checkpoints
+    }
+    {
+        using pixel_t = gil::ycbcr_601_8_pixel_t;
+        using factors_t = mp11::mp_list_c<int, 4, 2, 2>;
+        using image_t = gil::subchroma_image<pixel_t, factors_t>;
+
+        std::size_t const y_width = 320;
+        std::size_t const y_height = 240;
+
+        std::size_t image_size = (y_width * y_height)
+            + (y_width / image_t::ss_X) * (y_height / image_t::ss_Y)
+            + (y_width / image_t::ss_X) * (y_height / image_t::ss_Y);
+
+        std::vector<unsigned char> data(image_size); // TODO: Initialize? --mloskot
+
+        image_t::view_t v = gil::subchroma_view<pixel_t, factors_t>(y_width, y_height, &data.front());
+        //gil::rgb8_pixel_t p;  // TODO: Why RGB?? --mloskot
+        //p = *v.xy_at(0, 0);
+        auto p = *v.xy_at(0, 0);
+
+        // TODO: Add BOOST_TEST checkpoints
+    }
+}
+
+int main()
+{
+    test_subchroma_image();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/header/CMakeLists.txt b/src/boost/libs/gil/test/header/CMakeLists.txt
new file mode 100644
index 000000000..61af9cf81
--- /dev/null
+++ b/src/boost/libs/gil/test/header/CMakeLists.txt
@@ -0,0 +1,106 @@
+#
+# Copyright (c) 2018 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+
+# List headers in order: concepts, core, io, extensions
+file(GLOB_RECURSE _hpp_concepts RELATIVE
+  "${CMAKE_SOURCE_DIR}/include/boost/gil"
+  "${CMAKE_SOURCE_DIR}/include/boost/gil/concepts/*.hpp")
+list(APPEND _headers ${_hpp_concepts})
+
+file(GLOB _hpp_core RELATIVE
+  "${CMAKE_SOURCE_DIR}/include/boost/gil"
+  "${CMAKE_SOURCE_DIR}/include/boost/gil/*.hpp")
+list(APPEND _headers ${_hpp_core})
+
+list(APPEND _ext_dirs extension/dynamic_image/)
+if(BOOST_GIL_ENABLE_EXT_NUMERIC)
+  list(APPEND _ext_dirs extension/numeric)
+endif()
+if(BOOST_GIL_ENABLE_EXT_TOOLBOX)
+  list(APPEND _ext_dirs extension/toolbox)
+endif()
+if(BOOST_GIL_ENABLE_EXT_IO)
+  list(APPEND _ext_dirs io)
+  list(APPEND _ext_dirs extension/io)
+endif()
+
+foreach(_dir ${_ext_dirs})
+  file(GLOB_RECURSE _hpp RELATIVE
+    "${CMAKE_SOURCE_DIR}/include/boost/gil"
+    "${CMAKE_SOURCE_DIR}/include/boost/gil/${_dir}/*.hpp")
+  list(APPEND _headers ${_hpp})
+endforeach()
+
+if(NOT BOOST_GIL_ENABLE_EXT_IO_RAW)
+  list(FILTER _headers EXCLUDE REGEX "\\/raw[\\.\\/]")
+endif()
+
+#-----------------------------------------------------------------------------
+# Target: test_headers_self_contained
+# Bundles all targets of self-contained header tests,
+# functional equivalent to self-contained header tests defined in Jamfile.
+#-----------------------------------------------------------------------------
+message(STATUS "Boost.GIL: Configuring self-contained header tests for all headers")
+add_custom_target(test_headers_self_contained)
+
+file(READ ${CMAKE_CURRENT_LIST_DIR}/main.cpp _main_content)
+
+foreach(_header ${_headers})
+  string(REPLACE ".hpp" "" _target ${_header})
+  string(REPLACE "/" "-" _target ${_target})
+  set(_cpp ${CMAKE_BINARY_DIR}/test/headers/${_target}.cpp)
+  set(_target test_header_${_target})
+
+  string(REPLACE "BOOST_GIL_TEST_HEADER" "${_header}" _content "${_main_content}")
+  file(WRITE ${_cpp} "${_content}")
+  unset(_content)
+
+  add_executable(${_target})
+
+  target_sources(${_target}
+    PRIVATE
+      ${_cpp}
+      ${CMAKE_SOURCE_DIR}/include/boost/gil/${_header})
+  unset(_cpp)
+
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+
+  add_dependencies(test_headers_self_contained ${_target})
+
+  unset(_target)
+endforeach()
+
+#-----------------------------------------------------------------------------
+# Target: test_headers_all_in_one
+# Verifies compilation of all headers included in one translation unit.
+# An extra advantage is that such translation unit can be analysed with clang-tidy, etc.
+#-----------------------------------------------------------------------------
+message(STATUS "Boost.GIL: Configuring all-in-one headers test for all headers")
+
+set(_cpp ${CMAKE_BINARY_DIR}/test/headers/test_headers_all_in_one.cpp)
+file(WRITE ${_cpp} "// All headers included in one translation unit\n")
+foreach(_header ${_headers})
+  file(APPEND ${_cpp} "#include <boost/gil/${_header}>\n")
+endforeach()
+unset(_headers)
+file(APPEND ${_cpp} "int main() { return 0; }\n")
+
+add_executable(test_headers_all_in_one)
+
+target_sources(test_headers_all_in_one PRIVATE ${_cpp})
+unset(_cpp)
+
+target_link_libraries(test_headers_all_in_one
+  PRIVATE
+    gil_compile_options
+    gil_include_directories
+    gil_dependencies)
diff --git a/src/boost/libs/gil/test/header/main.cpp b/src/boost/libs/gil/test/header/main.cpp
new file mode 100644
index 000000000..1466f825c
--- /dev/null
+++ b/src/boost/libs/gil/test/header/main.cpp
@@ -0,0 +1,19 @@
+//
+// Copyright (c) 2018 Mateusz Loskot <mateusz@loskot.net>
+// Copyright (c) 2007-2015 Andrey Semashev
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// This file contains a test boilerplate for checking that every public header
+// is self-contained and does not have any missing #include-s.
+
+#define BOOST_GIL_TEST_INCLUDE_HEADER() <boost/gil/BOOST_GIL_TEST_HEADER>
+
+#include BOOST_GIL_TEST_INCLUDE_HEADER()
+
+int main()
+{
+    return 0;
+}
diff --git a/src/boost/libs/gil/test/legacy/CMakeLists.txt b/src/boost/libs/gil/test/legacy/CMakeLists.txt
new file mode 100644
index 000000000..de870c968
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/CMakeLists.txt
@@ -0,0 +1,64 @@
+#
+# Copyright (c) 2019 Mateusz Loskot <mateusz at loskot dot net>
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+# *** IMPORTANT MAINTENANCE RULES ***
+# These are GIL's original, comprehensive, all-in-one test suites.
+#   * Keep as reference.
+#   * Do NOT extend.
+#   * Do NOT refactor.
+#   * Modify only if absolutely necessary (a bug found in the tests).
+# See the accompanying README.md
+#
+message(STATUS "Boost.GIL: Configuring tests in test/legacy")
+
+foreach(_name
+  channel
+  pixel
+  pixel_iterator)
+  set(_test t_legacy_${_name})
+  set(_target test_legacy_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE ${_name}.cpp error_if.cpp)
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target})
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
+
+# Add extra source files accompanying image.cpp
+foreach(_name
+  image)
+  set(_test t_legacy_${_name})
+  set(_target test_legacy_${_name})
+
+  add_executable(${_target} "")
+  target_sources(${_target} PRIVATE
+    ${_name}.cpp
+    error_if.cpp
+    sample_image.cpp)
+
+  target_link_libraries(${_target}
+    PRIVATE
+      gil_compile_options
+      gil_include_directories
+      gil_dependencies)
+  target_compile_definitions(${_target} PRIVATE BOOST_GIL_USE_CONCEPT_CHECK)
+  add_test(NAME ${_test} COMMAND ${_target}
+    ${CMAKE_CURRENT_SOURCE_DIR}/gil_reference_checksums.txt)
+
+  unset(_name)
+  unset(_target)
+  unset(_test)
+endforeach()
diff --git a/src/boost/libs/gil/test/legacy/Jamfile b/src/boost/libs/gil/test/legacy/Jamfile
new file mode 100644
index 000000000..048ab8c49
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/Jamfile
@@ -0,0 +1,26 @@
+# Boost.GIL (Generic Image Library) - legacy tests
+#
+# Copyright (c) 2007-2015 Andrey Semashev
+# Copyright (c) 2008 Lubomir Bourdev, Hailin Jin
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or
+# copy at http://www.boost.org/LICENSE_1_0.txt)
+#
+# *** IMPORTANT MAINTENANCE RULES ***
+# These are GIL's original, comprehensive, all-in-one test suites.
+#   * Keep as reference.
+#   * Do NOT extend.
+#   * Do NOT refactor.
+#   * Modify only if absolutely necessary (a bug found in the tests).
+# See the accompanying README.md
+
+import testing ;
+
+run image.cpp sample_image.cpp error_if.cpp : : gil_reference_checksums.txt ;
+run channel.cpp error_if.cpp ;
+run pixel.cpp error_if.cpp ;
+run pixel_iterator.cpp error_if.cpp ;
+
+alias perf : [ run performance.cpp ] ;
+explicit perf ;
diff --git a/src/boost/libs/gil/test/legacy/README.md b/src/boost/libs/gil/test/legacy/README.md
new file mode 100644
index 000000000..76bc42828
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/README.md
@@ -0,0 +1,16 @@
+# Boost.GIL Legacy Tests
+
+These are GIL's original, comprehensive, all-in-one test suits.
+
+Rules of maintenance:
+
+* Run the legacy tests as part of CI builds and regression tests.
+* Keep as reference.
+* Do NOT extend.
+* Do NOT refactor.
+* Modify ONLY if absolutely necessary (a bug found in the tests).
+
+Add new test suites, with new test cases, even if their
+functional coverage is the same as of the legacy tests.
+
+See [CONTRIBUTING.md](../../CONTRIBUTING.md).
diff --git a/src/boost/libs/gil/test/legacy/channel.cpp b/src/boost/libs/gil/test/legacy/channel.cpp
new file mode 100644
index 000000000..b4225d20e
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/channel.cpp
@@ -0,0 +1,408 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil/channel.hpp>
+#include <boost/gil/channel_algorithm.hpp>
+#include <boost/gil/typedefs.hpp>
+
+#include <cstdint>
+#include <exception>
+#include <iostream>
+#include <type_traits>
+
+#if defined(BOOST_CLANG)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wfloat-equal"
+#elif BOOST_GCC >= 40700
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+#elif BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
+#pragma warning(push)
+#pragma warning(disable:4512) //assignment operator could not be generated
+#endif
+
+using namespace boost::gil;
+using namespace std;
+
+void error_if(bool);
+
+auto c8_min   = channel_traits<uint8_t>::min_value();
+auto c8_max   = channel_traits<uint8_t>::max_value();
+auto c8s_min  = channel_traits<int8_t>::min_value();
+auto c8s_max  = channel_traits<int8_t>::max_value();
+auto c16_min  = channel_traits<uint16_t>::min_value();
+auto c16_max  = channel_traits<uint16_t>::max_value();
+auto c16s_min = channel_traits<int16_t>::min_value();
+auto c16s_max = channel_traits<int16_t>::max_value();
+auto c32_min  = channel_traits<uint32_t>::min_value();
+auto c32_max  = channel_traits<uint32_t>::max_value();
+auto c32s_min = channel_traits<int32_t>::min_value();
+auto c32s_max = channel_traits<int32_t>::max_value();
+auto c32f_min = channel_traits<float32_t>::min_value();
+auto c32f_max = channel_traits<float32_t>::max_value();
+
+
+template <typename ChannelTestCore>
+struct do_test : public ChannelTestCore {
+    using channel_t = typename ChannelTestCore::channel_t;
+    using channel_value_t = typename channel_traits<channel_t>::value_type;
+
+    do_test() : ChannelTestCore() {
+        error_if(this->_min_v != channel_traits<channel_t>::min_value());
+        error_if(this->_max_v != channel_traits<channel_t>::max_value());
+    }
+
+    void test_all() {
+        test_channel_invert();
+        test_channel_convert();
+        test_channel_multiply();
+        test_channel_math();
+    }
+
+    void test_mutable(std::false_type) {}
+    void test_mutable(std::true_type) {
+        channel_value_t mv=this->_min_v;
+        ++this->_min_v; this->_min_v++;
+        --this->_min_v; this->_min_v--;
+        error_if(mv!=this->_min_v);
+
+        this->_min_v+=1;
+        this->_min_v-=1;
+        error_if(mv!=this->_min_v);
+
+        this->_min_v*=1;
+        this->_min_v/=1;
+        error_if(mv!=this->_min_v);
+
+         this->_min_v = 1;    // assignable to scalar
+         this->_min_v = mv;   // and to value type
+
+         // test swap
+         channel_value_t v1=this->_min_v;
+         channel_value_t v2=this->_max_v;
+         swap(this->_min_v, this->_max_v);
+
+         channel_value_t v3=this->_min_v;
+         channel_value_t v4=this->_max_v;
+         error_if(v1!=v4 || v2!=v3);
+    }
+
+    void test_channel_math() {
+        error_if(this->_min_v >= this->_max_v);
+        error_if(this->_max_v <= this->_min_v);
+        error_if(this->_min_v > this->_max_v);
+        error_if(this->_max_v < this->_min_v);
+        error_if(this->_max_v == this->_min_v);
+        error_if(!(this->_max_v != this->_min_v));
+
+        error_if(this->_min_v * 1 != this->_min_v);
+        error_if(this->_min_v / 1 != this->_min_v);
+
+        error_if((this->_min_v + 1) + 1 != (this->_min_v + 2));
+        error_if((this->_max_v - 1) - 1 != (this->_max_v - 2));
+
+        error_if(this->_min_v != 1 && this->_min_v==1);  // comparable to integral
+
+
+        test_mutable(std::integral_constant<bool, channel_traits<channel_t>::is_mutable>());
+    }
+
+
+    void test_channel_invert() {
+        error_if(channel_invert(this->_min_v) != this->_max_v);
+        error_if(channel_invert(this->_max_v) != this->_min_v);
+    }
+
+    void test_channel_multiply() {
+        error_if(channel_multiply(this->_min_v, this->_min_v) != this->_min_v);
+        error_if(channel_multiply(this->_max_v, this->_max_v) != this->_max_v);
+        error_if(channel_multiply(this->_max_v, this->_min_v) != this->_min_v);
+    }
+
+    void test_channel_convert() {
+        channel_value_t  v_min, v_max;
+
+        v_min=channel_convert<channel_t>(c8_min);
+        v_max=channel_convert<channel_t>(c8_max);
+        error_if(v_min!=this->_min_v || v_max!=this->_max_v);
+
+        v_min=channel_convert<channel_t>(c8s_min);
+        v_max=channel_convert<channel_t>(c8s_max);
+        error_if(v_min!=this->_min_v || v_max!=this->_max_v);
+
+        v_min=channel_convert<channel_t>(c16_min);
+        v_max=channel_convert<channel_t>(c16_max);
+        error_if(v_min!=this->_min_v || v_max!=this->_max_v);
+
+        v_min=channel_convert<channel_t>(c16s_min);
+        v_max=channel_convert<channel_t>(c16s_max);
+        error_if(v_min!=this->_min_v || v_max!=this->_max_v);
+
+        v_min=channel_convert<channel_t>(c32_min);
+        v_max=channel_convert<channel_t>(c32_max);
+        error_if(v_min!=this->_min_v || v_max!=this->_max_v);
+
+        v_min=channel_convert<channel_t>(c32s_min);
+        v_max=channel_convert<channel_t>(c32s_max);
+        error_if(v_min!=this->_min_v || v_max!=this->_max_v);
+
+        v_min=channel_convert<channel_t>(c32f_min);
+        v_max=channel_convert<channel_t>(c32f_max);
+        error_if(v_min!=this->_min_v || v_max!=this->_max_v);
+    }
+};
+
+// Different core classes depending on the different types of channels - channel values, references and subbyte references
+// The cores ensure there are two members, _min_v and _max_v initialized with the minimum and maximum channel value.
+// The different channel types have different ways to initialize them, thus require different cores
+
+// For channel values simply initialize the value directly
+template <typename ChannelValue>
+class value_core {
+protected:
+    using channel_t = ChannelValue;
+    channel_t _min_v;
+    channel_t _max_v;
+
+    value_core()
+        : _min_v(channel_traits<ChannelValue>::min_value())
+        , _max_v(channel_traits<ChannelValue>::max_value())
+    {
+        boost::function_requires<ChannelValueConcept<ChannelValue> >();
+    }
+};
+
+// For channel references we need to have separate channel values
+template <typename ChannelRef>
+class reference_core : public value_core<typename channel_traits<ChannelRef>::value_type>
+{
+    using parent_t = value_core<typename channel_traits<ChannelRef>::value_type>;
+
+protected:
+    using channel_t = ChannelRef;
+    channel_t _min_v;
+    channel_t _max_v;
+
+    reference_core()
+        : parent_t()
+        , _min_v(parent_t::_min_v)
+        , _max_v(parent_t::_max_v)
+    {
+        boost::function_requires<ChannelConcept<ChannelRef> >();
+    }
+};
+
+// For subbyte channel references we need to store the bit buffers somewhere
+template <typename ChannelSubbyteRef, typename ChannelMutableRef = ChannelSubbyteRef>
+class packed_reference_core {
+protected:
+    using channel_t = ChannelSubbyteRef;
+    using integer_t = typename channel_t::integer_t;
+    channel_t _min_v, _max_v;
+
+    integer_t _min_buf, _max_buf;
+
+    packed_reference_core() : _min_v(&_min_buf), _max_v(&_max_buf) {
+        ChannelMutableRef b1(&_min_buf), b2(&_max_buf);
+        b1 = channel_traits<channel_t>::min_value();
+        b2 = channel_traits<channel_t>::max_value();
+
+        boost::function_requires<ChannelConcept<ChannelSubbyteRef> >();
+    }
+};
+
+template <typename ChannelSubbyteRef, typename ChannelMutableRef = ChannelSubbyteRef>
+class packed_dynamic_reference_core {
+protected:
+    using channel_t = ChannelSubbyteRef;
+    channel_t _min_v, _max_v;
+
+    typename channel_t::integer_t _min_buf, _max_buf;
+
+    packed_dynamic_reference_core(int first_bit1=1, int first_bit2=2) : _min_v(&_min_buf,first_bit1), _max_v(&_max_buf,first_bit2) {
+        ChannelMutableRef b1(&_min_buf,1), b2(&_max_buf,2);
+        b1 = channel_traits<channel_t>::min_value();
+        b2 = channel_traits<channel_t>::max_value();
+
+        boost::function_requires<ChannelConcept<ChannelSubbyteRef> >();
+    }
+};
+
+
+template <typename ChannelValue>
+void test_channel_value() {
+    do_test<value_core<ChannelValue> >().test_all();
+}
+
+template <typename ChannelRef>
+void test_channel_reference() {
+    do_test<reference_core<ChannelRef> >().test_all();
+}
+
+template <typename ChannelSubbyteRef>
+void test_packed_channel_reference() {
+    do_test<packed_reference_core<ChannelSubbyteRef,ChannelSubbyteRef> >().test_all();
+}
+
+template <typename ChannelSubbyteRef, typename MutableRef>
+void test_const_packed_channel_reference() {
+    do_test<packed_reference_core<ChannelSubbyteRef,MutableRef> >().test_all();
+}
+
+template <typename ChannelSubbyteRef>
+void test_packed_dynamic_channel_reference() {
+    do_test<packed_dynamic_reference_core<ChannelSubbyteRef,ChannelSubbyteRef> >().test_all();
+}
+
+template <typename ChannelSubbyteRef, typename MutableRef>
+void test_const_packed_dynamic_channel_reference() {
+    do_test<packed_dynamic_reference_core<ChannelSubbyteRef,MutableRef> >().test_all();
+}
+
+template <typename ChannelValue>
+void test_channel_value_impl() {
+    test_channel_value<ChannelValue>();
+    test_channel_reference<ChannelValue&>();
+    test_channel_reference<const ChannelValue&>();
+}
+
+/////////////////////////////////////////////////////////
+///
+/// A channel archetype - to test the minimum requirements of the concept
+///
+/////////////////////////////////////////////////////////
+
+struct channel_value_archetype;
+struct channel_archetype {
+    // equality comparable
+    friend bool operator==(const channel_archetype&,const channel_archetype&) { return true; }
+    friend bool operator!=(const channel_archetype&,const channel_archetype&) { return false; }
+    // less-than comparable
+    friend bool operator<(const channel_archetype&,const channel_archetype&) { return false; }
+    // convertible to a scalar
+    operator std::uint8_t() const { return 0; }
+
+
+    channel_archetype& operator++() { return *this; }
+    channel_archetype& operator--() { return *this; }
+    channel_archetype  operator++(int) { return *this; }
+    channel_archetype  operator--(int) { return *this; }
+
+    template <typename Scalar> channel_archetype operator+=(Scalar) { return *this; }
+    template <typename Scalar> channel_archetype operator-=(Scalar) { return *this; }
+    template <typename Scalar> channel_archetype operator*=(Scalar) { return *this; }
+    template <typename Scalar> channel_archetype operator/=(Scalar) { return *this; }
+
+    using value_type = channel_value_archetype;
+    using reference = channel_archetype;
+    using const_reference = channel_archetype const;
+    using pointer = channel_value_archetype *;
+    using const_pointer = channel_value_archetype const*;
+    static constexpr bool is_mutable=true;
+
+    static value_type min_value();
+    static value_type max_value();
+};
+
+
+struct channel_value_archetype : public channel_archetype {
+    channel_value_archetype() {}                                        // default constructible
+    channel_value_archetype(const channel_value_archetype&) {}          // copy constructible
+    channel_value_archetype& operator=(const channel_value_archetype&){return *this;} // assignable
+    channel_value_archetype(std::uint8_t) {}
+};
+
+channel_value_archetype channel_archetype::min_value() { return channel_value_archetype(); }
+channel_value_archetype channel_archetype::max_value() { return channel_value_archetype(); }
+
+
+void test_packed_channel_reference()
+{
+    using channel16_0_5_reference_t = packed_channel_reference<std::uint16_t, 0, 5, true>;
+    using channel16_5_6_reference_t = packed_channel_reference<std::uint16_t, 5, 6, true>;
+    using channel16_11_5_reference_t = packed_channel_reference<std::uint16_t, 11, 5, true>;
+
+    std::uint16_t data=0;
+    channel16_0_5_reference_t   channel1(&data);
+    channel16_5_6_reference_t   channel2(&data);
+    channel16_11_5_reference_t  channel3(&data);
+
+    channel1=channel_traits<channel16_0_5_reference_t>::max_value();
+    channel2=channel_traits<channel16_5_6_reference_t>::max_value();
+    channel3=channel_traits<channel16_11_5_reference_t>::max_value();
+    error_if(data!=65535);
+
+    test_packed_channel_reference<channel16_0_5_reference_t>();
+    test_packed_channel_reference<channel16_5_6_reference_t>();
+    test_packed_channel_reference<channel16_11_5_reference_t>();
+}
+
+void test_packed_dynamic_channel_reference()
+{
+    using channel16_5_reference_t = packed_dynamic_channel_reference<std::uint16_t, 5, true>;
+    using channel16_6_reference_t = packed_dynamic_channel_reference<std::uint16_t, 6, true>;
+
+    std::uint16_t data=0;
+    channel16_5_reference_t  channel1(&data,0);
+    channel16_6_reference_t  channel2(&data,5);
+    channel16_5_reference_t  channel3(&data,11);
+
+    channel1=channel_traits<channel16_5_reference_t>::max_value();
+    channel2=channel_traits<channel16_6_reference_t>::max_value();
+    channel3=channel_traits<channel16_5_reference_t>::max_value();
+    error_if(data!=65535);
+
+    test_packed_dynamic_channel_reference<channel16_5_reference_t>();
+}
+
+void test_channel() {
+    test_channel_value_impl<uint8_t>();
+    test_channel_value_impl<int8_t>();
+    test_channel_value_impl<uint16_t>();
+    test_channel_value_impl<int16_t>();
+    test_channel_value_impl<uint32_t>();
+    test_channel_value_impl<int16_t>();
+
+    test_channel_value_impl<float32_t>();
+
+    test_packed_channel_reference();
+    test_packed_dynamic_channel_reference();
+
+    // Do only compile-time tests for the archetype (because asserts like val1<val2 fail)
+    boost::function_requires<MutableChannelConcept<channel_archetype> >();
+
+    do_test<value_core<channel_value_archetype> >();
+    do_test<reference_core<channel_archetype> >();
+    do_test<reference_core<const channel_archetype&> >();
+}
+
+int main()
+{
+    try
+    {
+        test_channel();
+
+        return EXIT_SUCCESS;
+    }
+    catch (std::exception const& e)
+    {
+        std::cerr << e.what() << std::endl;
+        return EXIT_FAILURE;
+    }
+    catch (...)
+    {
+        return EXIT_FAILURE;
+    }
+}
+
+// TODO:
+// - provide algorithm performance overloads for scoped channel and packed channels
+// - Update concepts and documentation
+// - What to do about pointer types?!
+// - Performance!!
+//      - is channel_convert the same as native?
+//      - is operator++ on float32_t the same as native? How about if operator++ is defined in scoped_channel to do _value++?
diff --git a/src/boost/libs/gil/test/legacy/error_if.cpp b/src/boost/libs/gil/test/legacy/error_if.cpp
new file mode 100644
index 000000000..532d9062c
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/error_if.cpp
@@ -0,0 +1,13 @@
+// Copyright 2008 Lubomir Bourdev and Hailin Jin
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#include <exception>
+
+void error_if(bool condition) {
+    if (condition)
+        throw std::exception();
+}
+
diff --git a/src/boost/libs/gil/test/legacy/gil_reference_checksums.txt b/src/boost/libs/gil/test/legacy/gil_reference_checksums.txt
new file mode 100644
index 000000000..ca123231d
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/gil_reference_checksums.txt
@@ -0,0 +1,125 @@
+bgr121_basic_red_x 7f6e24e7
+bgr121_basic_white_x e4aaa1d3
+bgr121_histogram_histogram ca580192
+bgr121_views_0th_k_channel daa9f7e3
+bgr121_views_90ccw c64d6d20
+bgr121_views_90cw 8565efd8
+bgr121_views_cropped 43305e15
+bgr121_views_flipped_lr 2d68e448
+bgr121_views_flipped_ud 8f7f7d00
+bgr121_views_gray8 bbabe219
+bgr121_views_my_gray8 3086d22f
+bgr121_views_original 7e5bb87d
+bgr121_views_rot180 68f37202
+bgr121_views_subsampled ac6ca178
+bgr121_views_transpose da2ff80
+bgr8_basic_red_x 7f6e24e7
+bgr8_basic_white_x e4aaa1d3
+bgr8_histogram_histogram badcdd58
+bgr8_views_0th_k_channel 4638e58d
+bgr8_views_0th_n_channel 4638e58d
+bgr8_views_90ccw 8c4980e5
+bgr8_views_90cw e4c69665
+bgr8_views_cropped ff56b05e
+bgr8_views_flipped_lr 63849267
+bgr8_views_flipped_ud c4dcc848
+bgr8_views_gray8 3817178f
+bgr8_views_my_gray8 b33a27b9
+bgr8_views_original 423f1dde
+bgr8_views_rot180 150f1206
+bgr8_views_subsampled 92439ee7
+bgr8_views_transpose c9a890a0
+color_converted_0th_k_channel 3817178f
+color_converted_0th_n_channel 3817178f
+color_converted_90ccw dc403b3
+color_converted_90cw c6fc34de
+color_converted_cropped 666252a
+color_converted_flipped_lr 7ab2d721
+color_converted_flipped_ud 8ad49b3
+color_converted_gray8 3817178f
+color_converted_my_gray8 3817178f
+color_converted_original 3817178f
+color_converted_rot180 b5d0763b
+color_converted_subsampled 28286169
+color_converted_transpose 366b8392
+dynamic_ 423f1dde
+dynamic_fliplr 63849267
+dynamic_flipud c4dcc848
+dynamic_subimage a974d099
+dynamic_subimage_subsampled180rot 4055263a
+gray8_basic_red_x ab461c6a
+gray8_basic_white_x be81c274
+gray8_histogram_histogram badcdd58
+gray8_views_0th_k_channel 3817178f
+gray8_views_0th_n_channel 3817178f
+gray8_views_90ccw dc403b3
+gray8_views_90cw c6fc34de
+gray8_views_cropped 666252a
+gray8_views_flipped_lr 7ab2d721
+gray8_views_flipped_ud 8ad49b3
+gray8_views_gray8 3817178f
+gray8_views_my_gray8 3817178f
+gray8_views_original 3817178f
+gray8_views_rot180 b5d0763b
+gray8_views_subsampled 28286169
+gray8_views_transpose 366b8392
+mandelLuminosityGradient 4ebf3906
+planarrgb8_basic_red_x 7f6e24e7
+planarrgb8_basic_white_x e4aaa1d3
+planarrgb8_histogram_histogram badcdd58
+planarrgb8_views_0th_k_channel 1f48996f
+planarrgb8_views_0th_n_channel 1f48996f
+planarrgb8_views_90ccw 8c4980e5
+planarrgb8_views_90cw e4c69665
+planarrgb8_views_cropped ff56b05e
+planarrgb8_views_flipped_lr 63849267
+planarrgb8_views_flipped_ud c4dcc848
+planarrgb8_views_gray8 3817178f
+planarrgb8_views_my_gray8 b33a27b9
+planarrgb8_views_original 423f1dde
+planarrgb8_views_rot180 150f1206
+planarrgb8_views_subsampled 92439ee7
+planarrgb8_views_transpose c9a890a0
+rgb8_basic_red_x 7f6e24e7
+rgb8_basic_white_x e4aaa1d3
+rgb8_histogram_histogram badcdd58
+rgb8_views_0th_k_channel 1f48996f
+rgb8_views_0th_n_channel 1f48996f
+rgb8_views_90ccw 8c4980e5
+rgb8_views_90cw e4c69665
+rgb8_views_cropped ff56b05e
+rgb8_views_flipped_lr 63849267
+rgb8_views_flipped_ud c4dcc848
+rgb8_views_gray8 3817178f
+rgb8_views_my_gray8 b33a27b9
+rgb8_views_original 423f1dde
+rgb8_views_rot180 150f1206
+rgb8_views_subsampled 92439ee7
+rgb8_views_transpose c9a890a0
+subsampled_0th_k_channel 2c19afc1
+subsampled_0th_n_channel 2c19afc1
+subsampled_90ccw d4649279
+subsampled_90cw e74f0f0e
+subsampled_cropped a5f07581
+subsampled_flipped_lr 8f22df7
+subsampled_flipped_ud 26383f1d
+subsampled_gray8 c95e3def
+subsampled_my_gray8 91ea1379
+subsampled_original 64cf9a6b
+subsampled_rot180 6059029b
+subsampled_subsampled 59aef23b
+subsampled_transpose ec4b368a
+virtual_0th_k_channel 79bca658
+virtual_0th_n_channel 79bca658
+virtual_90ccw 965db1f7
+virtual_90cw a81d80e3
+virtual_cropped ffb4af2c
+virtual_flipped_lr 9d1478c2
+virtual_flipped_ud 18dc9b78
+virtual_gray8 962f6f6f
+virtual_histogram 8deb06eb
+virtual_my_gray8 150bb50d
+virtual_original 927686d4
+virtual_rot180 4dee193e
+virtual_subsampled e99b8073
+virtual_transpose 923e345f
diff --git a/src/boost/libs/gil/test/legacy/image.cpp b/src/boost/libs/gil/test/legacy/image.cpp
new file mode 100644
index 000000000..67b5e0a6a
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/image.cpp
@@ -0,0 +1,612 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifdef _MSC_VER
+#pragma warning(disable : 4244)     // conversion from 'gil::image<V,Alloc>::coord_t' to 'int', possible loss of data (visual studio compiler doesn't realize that the two types are the same)
+#pragma warning(disable : 4503)     // decorated name length exceeded, name was truncated
+#pragma warning(disable : 4701)     // potentially uninitialized local variable 'result' used in boost/crc.hpp
+#endif
+
+#include <boost/gil.hpp>
+#include <boost/gil/extension/dynamic_image/dynamic_image_all.hpp>
+
+#include <boost/core/ignore_unused.hpp>
+#include <boost/crc.hpp>
+#include <boost/mp11.hpp>
+
+#include <ios>
+#include <iostream>
+#include <fstream>
+#include <map>
+#include <stdexcept>
+#include <string>
+#include <type_traits>
+#include <vector>
+
+using namespace boost::gil;
+using namespace std;
+using namespace boost;
+
+extern rgb8c_planar_view_t sample_view;
+void error_if(bool condition);
+
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
+#pragma warning(push)
+#pragma warning(disable:4127) //conditional expression is constant
+#endif
+
+// When BOOST_GIL_GENERATE_REFERENCE_DATA is defined, the reference data is generated and saved.
+// When it is undefined, regression tests are checked against it
+//#define BOOST_GIL_GENERATE_REFERENCE_DATA
+
+////////////////////////////////////////////////////
+///
+///  Some algorithms to use in testing
+///
+////////////////////////////////////////////////////
+
+template <typename GrayView, typename R>
+void gray_image_hist(GrayView const& img_view, R& hist)
+{
+    for (auto it = img_view.begin(); it != img_view.end(); ++it)
+        ++hist[*it];
+
+    // Alternatively, prefer the algorithm with lambda
+    // for_each_pixel(img_view, [&hist](gray8_pixel_t const& pixel) {
+    //     ++hist[pixel];
+    // });
+}
+
+template <typename V, typename R>
+void get_hist(const V& img_view, R& hist) {
+    gray_image_hist(color_converted_view<gray8_pixel_t>(img_view), hist);
+}
+
+// testing custom color conversion
+template <typename C1, typename C2>
+struct my_color_converter_impl : public default_color_converter_impl<C1,C2> {};
+template <typename C1>
+struct my_color_converter_impl<C1,gray_t> {
+    template <typename P1, typename P2>
+    void operator()(const P1& src, P2& dst) const {
+        default_color_converter_impl<C1,gray_t>()(src,dst);
+        get_color(dst,gray_color_t())=channel_invert(get_color(dst,gray_color_t()));
+    }
+};
+
+struct my_color_converter {
+    template <typename SrcP,typename DstP>
+    void operator()(const SrcP& src,DstP& dst) const {
+        using src_cs_t = typename color_space_type<SrcP>::type;
+        using dst_cs_t = typename color_space_type<DstP>::type;
+        my_color_converter_impl<src_cs_t,dst_cs_t>()(src,dst);
+    }
+};
+
+/// Models a Unary Function
+/// \tparam P models PixelValueConcept
+template <typename P>
+struct mandelbrot_fn
+{
+    using point_t = boost::gil::point_t;
+    using const_t = mandelbrot_fn<P>;
+    using value_type = P;
+    using reference = value_type;
+    using const_reference = value_type;
+    using argument_type = point_t;
+    using result_type = reference;
+    static constexpr bool is_mutable = false;
+
+    value_type                    _in_color,_out_color;
+    point_t                       _img_size;
+    static const int MAX_ITER=100;        // max number of iterations
+
+    mandelbrot_fn() {}
+    mandelbrot_fn(const point_t& sz, const value_type& in_color, const value_type& out_color) : _in_color(in_color), _out_color(out_color), _img_size(sz) {}
+
+    result_type operator()(const point_t& p) const {
+        // normalize the coords to (-2..1, -1.5..1.5)
+        // (actually make y -1.0..2 so it is asymmetric, so we can verify some view factory methods)
+        double t=get_num_iter(point<double>(p.x/(double)_img_size.x*3-2, p.y/(double)_img_size.y*3-1.0f));//1.5f));
+        t=pow(t,0.2);
+
+        value_type ret;
+        for (std::size_t k=0; k<num_channels<P>::value; ++k)
+            ret[k]=(typename channel_type<value_type>::type)(_in_color[k]*t + _out_color[k]*(1-t));
+        return ret;
+    }
+
+private:
+    double get_num_iter(const point<double>& p) const {
+        point<double> Z(0,0);
+        for (int i=0; i<MAX_ITER; ++i) {
+            Z = point<double>(Z.x*Z.x - Z.y*Z.y + p.x, 2*Z.x*Z.y + p.y);
+            if (Z.x*Z.x + Z.y*Z.y > 4)
+                return i/(double)MAX_ITER;
+        }
+        return 0;
+    }
+};
+
+template <typename T>
+void x_gradient(const T& src, const gray8s_view_t& dst) {
+    for (int y=0; y<src.height(); ++y) {
+        typename T::x_iterator src_it = src.row_begin(y);
+        gray8s_view_t::x_iterator dst_it = dst.row_begin(y);
+
+        for (int x=1; x<src.width()-1; ++x)
+            dst_it[x] = (src_it[x+1] - src_it[x-1]) / 2;
+    }
+}
+
+// A quick test whether a view is homogeneous
+
+template <typename Pixel>
+struct pixel_is_homogeneous : public std::true_type {};
+
+template <typename P, typename C, typename L>
+struct pixel_is_homogeneous<packed_pixel<P,C,L> > : public std::false_type {};
+
+template <typename View>
+struct view_is_homogeneous : public pixel_is_homogeneous<typename View::value_type> {};
+
+////////////////////////////////////////////////////
+///
+///  Tests image view transformations and algorithms
+///
+////////////////////////////////////////////////////
+class image_test {
+public:
+    virtual void initialize() {}
+    virtual void finalize() {}
+    virtual ~image_test() {}
+
+    void run();
+protected:
+    virtual void check_view_impl(const rgb8c_view_t& view, const string& name)=0;
+    template <typename View>
+    void check_view(const View& img_view, const string& name) {
+        rgb8_image_t rgb_img(img_view.dimensions());
+        copy_and_convert_pixels(img_view,view(rgb_img));
+        check_view_impl(const_view(rgb_img), name);
+    }
+private:
+    template <typename Img> void basic_test(const string& prefix);
+    template <typename View> void view_transformations_test(const View& img_view, const string& prefix);
+    template <typename View> void homogeneous_view_transformations_test(const View& img_view, const string& prefix, std::true_type);
+    template <typename View> void homogeneous_view_transformations_test(const View& img_view, const string& prefix, std::false_type)
+    {
+        boost::ignore_unused(img_view);
+        boost::ignore_unused(prefix);
+    }
+    template <typename View> void histogram_test(const View& img_view, const string& prefix);
+    void virtual_view_test();
+    void packed_image_test();
+    void dynamic_image_test();
+    template <typename Img> void image_all_test(const string& prefix);
+};
+
+// testing image iterators, clone, fill, locators, color convert
+template <typename Img>
+void image_test::basic_test(const string& prefix) {
+    using View = typename Img::view_t;
+
+    // make a 20x20 image
+    Img img(typename View::point_t(20,20));
+    const View& img_view=view(img);
+
+    // fill it with red
+    rgb8_pixel_t red8(255,0,0), green8(0,255,0), blue8(0,0,255), white8(255,255,255);
+    typename View::value_type red,green,blue,white;
+    color_convert(red8,red);
+    default_color_converter()(red8,red);
+    red=color_convert_deref_fn<rgb8_ref_t,typename Img::view_t::value_type>()(red8);
+
+    color_convert(green8,green);
+    color_convert(blue8,blue);
+    color_convert(white8,white);
+    fill(img_view.begin(),img_view.end(),red);
+
+    color_convert(red8,img_view[0]);
+
+    // pointer to first pixel of second row
+    typename View::reference rt=img_view.at(0,0)[img_view.width()];
+    typename View::x_iterator ptr=&rt;
+    typename View::reference rt2=*(img_view.at(0,0)+img_view.width());
+    typename View::x_iterator ptr2=&rt2;
+    error_if(ptr!=ptr2);
+    error_if(img_view.x_at(0,0)+10!=10+img_view.x_at(0,0));
+
+    // draw a blue line along the diagonal
+    typename View::xy_locator loc=img_view.xy_at(0,img_view.height()-1);
+    for (int y=0; y<img_view.height(); ++y) {
+        *loc=blue;
+        ++loc.x();
+        loc.y()--;
+    }
+
+    // draw a green dotted line along the main diagonal with step of 3
+    loc=img_view.xy_at(img_view.width()-1,img_view.height()-1);
+    while (loc.x()>=img_view.x_at(0,0)) {
+        *loc=green;
+        loc-=typename View::point_t(3,3);
+    }
+
+    // Clone and make every red pixel white
+    Img imgWhite(img);
+    for (typename View::iterator it=view(imgWhite).end(); (it-1)!=view(imgWhite).begin(); --it) {
+        if (*(it-1)==red)
+            *(it-1)=white;
+    }
+
+    check_view(img_view,prefix+"red_x");
+    check_view(view(imgWhite),prefix+"white_x");
+}
+
+template <typename View>
+void image_test::histogram_test(const View& img_view, const string& prefix) {
+//  vector<int> histogram(255,0);
+//  get_hist(cropped,histogram.begin());
+    unsigned char histogram[256];
+    fill(histogram,histogram+256,0);
+    get_hist(img_view,histogram);
+    gray8c_view_t hist_view=interleaved_view(256,1,(const gray8_pixel_t*)histogram,256);
+    check_view(hist_view,prefix+"histogram");
+}
+
+template <typename View>
+void image_test::view_transformations_test(const View& img_view, const string& prefix) {
+    check_view(img_view,prefix+"original");
+
+    check_view(subimage_view(img_view, iround(img_view.dimensions()/4), iround(img_view.dimensions()/2)),prefix+"cropped");
+    check_view(color_converted_view<gray8_pixel_t>(img_view),prefix+"gray8");
+    check_view(color_converted_view<gray8_pixel_t>(img_view,my_color_converter()),prefix+"my_gray8");
+    check_view(transposed_view(img_view),prefix+"transpose");
+    check_view(rotated180_view(img_view),prefix+"rot180");
+    check_view(rotated90cw_view(img_view),prefix+"90cw");
+    check_view(rotated90ccw_view(img_view),prefix+"90ccw");
+    check_view(flipped_up_down_view(img_view),prefix+"flipped_ud");
+    check_view(flipped_left_right_view(img_view),prefix+"flipped_lr");
+    check_view(subsampled_view(img_view,typename View::point_t(2,1)),prefix+"subsampled");
+    check_view(kth_channel_view<0>(img_view),prefix+"0th_k_channel");
+    homogeneous_view_transformations_test(img_view, prefix, view_is_homogeneous<View>());
+}
+
+template <typename View>
+void image_test::homogeneous_view_transformations_test(const View& img_view, const string& prefix, std::true_type) {
+    check_view(nth_channel_view(img_view,0),prefix+"0th_n_channel");
+}
+
+void image_test::virtual_view_test()
+{
+    using deref_t = mandelbrot_fn<rgb8_pixel_t>;
+    using point_t = deref_t::point_t;
+    using locator_t = virtual_2d_locator<deref_t, false>;
+    using my_virt_view_t = image_view<locator_t>;
+
+    boost::function_requires<PixelLocatorConcept<locator_t> >();
+    gil_function_requires<StepIteratorConcept<locator_t::x_iterator> >();
+
+    point_t dims(200,200);
+    my_virt_view_t mandel(dims, locator_t(point_t(0,0), point_t(1,1), deref_t(dims, rgb8_pixel_t(255,0,255), rgb8_pixel_t(0,255,0))));
+
+    gray8s_image_t img(dims);
+    fill_pixels(view(img),0);   // our x_gradient algorithm doesn't change the first & last column, so make sure they are 0
+    x_gradient(color_converted_view<gray8_pixel_t>(mandel), view(img));
+    check_view(color_converted_view<gray8_pixel_t>(const_view(img)), "mandelLuminosityGradient");
+
+    view_transformations_test(mandel,"virtual_");
+    histogram_test(mandel,"virtual_");
+}
+
+// Test alignment and packed images
+void image_test::packed_image_test()
+{
+    using bgr131_image_t = bit_aligned_image3_type<1,3,1, bgr_layout_t>::type;
+    using bgr131_pixel_t = bgr131_image_t::value_type;
+    bgr131_pixel_t fill_val(1,3,1);
+
+    bgr131_image_t bgr131_img(3,10);
+    fill_pixels(view(bgr131_img), fill_val);
+
+    bgr131_image_t bgr131a_img(3,10,1);
+    copy_pixels(const_view(bgr131_img), view(bgr131a_img));
+
+    bgr131_image_t bgr131b_img(3,10,4);
+    copy_pixels(const_view(bgr131_img), view(bgr131b_img));
+
+    error_if(bgr131_img!=bgr131a_img || bgr131a_img!=bgr131b_img);
+}
+
+void image_test::dynamic_image_test()
+{
+    using any_image_t = any_image
+        <
+            mp11::mp_list
+            <
+                gray8_image_t,
+                bgr8_image_t,
+                argb8_image_t,
+                rgb8_image_t,
+                rgb8_planar_image_t
+            >
+        >;
+    rgb8_planar_image_t img(sample_view.dimensions());
+    copy_pixels(sample_view, view(img));
+    any_image_t any_img=any_image_t(img);
+
+    check_view(view(any_img), "dynamic_");
+    check_view(flipped_left_right_view(view(any_img)), "dynamic_fliplr");
+    check_view(flipped_up_down_view(view(any_img)), "dynamic_flipud");
+
+    any_image_t::view_t subimageView=subimage_view(view(any_img),0,0,10,15);
+
+    check_view(subimageView, "dynamic_subimage");
+    check_view(subsampled_view(rotated180_view(view(any_img)), 2,1), "dynamic_subimage_subsampled180rot");
+}
+
+template <typename Img>
+void image_test::image_all_test(const string& prefix) {
+    basic_test<Img>(prefix+"basic_");
+
+    Img img;
+    img.recreate(sample_view.dimensions());
+    copy_and_convert_pixels(sample_view,view(img));
+
+    view_transformations_test(view(img), prefix+"views_");
+
+    histogram_test(const_view(img),prefix+"histogram_");
+}
+
+void image_test::run() {
+    initialize();
+
+    image_all_test<bgr8_image_t>("bgr8_");
+    image_all_test<rgb8_image_t>("rgb8_");
+    image_all_test<rgb8_planar_image_t>("planarrgb8_");
+    image_all_test<gray8_image_t>("gray8_");
+
+// FIXME: https://github.com/boostorg/gil/issues/447
+// Disable bgc121_image_t drawing as work around for a mysterious bug
+// revealing itself when using MSVC 64-bit optimized build.
+#if !(defined(NDEBUG) && defined (_MSC_VER) && defined(_WIN64))
+    using bgr121_ref_t = bit_aligned_pixel_reference
+        <
+            boost::uint8_t,
+            mp11::mp_list_c<int, 1, 2, 1>,
+            bgr_layout_t,
+            true
+        > const;
+    using bgr121_image_t = image<bgr121_ref_t, false>;
+    image_all_test<bgr121_image_t>("bgr121_");
+#endif
+
+    // TODO: Remove?
+    view_transformations_test(subsampled_view(sample_view, point_t(1,2)), "subsampled_");
+    view_transformations_test(color_converted_view<gray8_pixel_t>(sample_view),"color_converted_");
+
+    virtual_view_test();
+    packed_image_test();
+    dynamic_image_test();
+
+    finalize();
+}
+
+////////////////////////////////////////////////////
+///
+///  Performs or generates image tests using checksums
+///
+////////////////////////////////////////////////////
+
+class checksum_image_mgr : public image_test
+{
+protected:
+    using crc_map_t = map<string, boost::crc_32_type::value_type>;
+    crc_map_t _crc_map;
+};
+
+////////////////////////////////////////////////////
+///
+///  Performs image tests by comparing image pixel checksums against a reference
+///
+////////////////////////////////////////////////////
+
+class checksum_image_test : public checksum_image_mgr {
+public:
+    checksum_image_test(const char* filename) : _filename(filename) {}
+private:
+    const char* _filename;
+    void initialize() override;
+    void check_view_impl(const rgb8c_view_t& v, const string& name) override;
+};
+
+// Load the checksums from the reference file and create the start image
+void checksum_image_test::initialize() {
+    boost::crc_32_type::value_type crc_result;
+    fstream checksum_ref(_filename,ios::in);
+    while (true) {
+        string crc_name;
+        checksum_ref >> crc_name >> std::hex >> crc_result;
+        if(checksum_ref.fail()) break;
+        if (!crc_name.empty() && crc_name[0] == '#')
+        {
+            crc_result = 0; // skip test case
+            crc_name = crc_name.substr(1);
+        }
+        _crc_map[crc_name]=crc_result;
+    }
+    checksum_ref.close();
+}
+
+// Create a checksum for the given view and compare it with the reference checksum. Throw exception if different
+void checksum_image_test::check_view_impl(const rgb8c_view_t& img_view, const string& name) {
+    boost::crc_32_type checksum_acumulator;
+    checksum_acumulator.process_bytes(img_view.row_begin(0),img_view.size()*3);
+    unsigned int const crc_expect = _crc_map[name];
+    if (crc_expect == 0)
+    {
+        cerr << "Skipping checksum check for " << name << " (crc=0)" << endl;
+        return;
+    }
+
+    boost::crc_32_type::value_type const crc = checksum_acumulator.checksum();
+    if (crc==crc_expect) {
+        cerr << "Checking checksum for " << name << " (crc=" << std::hex << crc << ")" << endl;
+    }
+    else {
+        cerr << "Checksum error in " << name
+             << " (crc=" << std::hex << crc << " != " << std::hex << crc_expect << ")" << endl;
+        error_if(true);
+    }
+}
+
+////////////////////////////////////////////////////
+///
+///  Generates a set of reference checksums to compare against
+///
+////////////////////////////////////////////////////
+
+class checksum_image_generate : public checksum_image_mgr {
+public:
+    checksum_image_generate(const char* filename) : _filename(filename) {}
+private:
+    const char* _filename;
+    void check_view_impl(const rgb8c_view_t& img_view, const string& name) override;
+    void finalize() override;
+};
+
+// Add the checksum of the given view to the map of checksums
+void checksum_image_generate::check_view_impl(const rgb8c_view_t& img_view, const string& name) {
+    boost::crc_32_type result;
+    result.process_bytes(img_view.row_begin(0),img_view.size()*3);
+    cerr << "Generating checksum for " << name << endl;
+    _crc_map[name] = result.checksum();
+}
+
+// Save the checksums into the reference file
+void checksum_image_generate::finalize() {
+    fstream checksum_ref(_filename,ios::out);
+    for (crc_map_t::const_iterator it=_crc_map.begin(); it!=_crc_map.end(); ++it) {
+        checksum_ref << it->first << " " << std::hex << it->second << "\r\n";
+    }
+    checksum_ref.close();
+}
+
+////////////////////////////////////////////////////
+///
+///  Performs or generates image tests using image I/O
+///
+////////////////////////////////////////////////////
+
+extern const string in_dir;
+extern const string out_dir;
+extern const string ref_dir;
+
+const string in_dir="";  // directory of source images
+const string out_dir=in_dir+"image-out/";    // directory where to write output
+const string ref_dir=in_dir+"image-ref/";  // reference directory to compare written with actual output
+
+void static_checks() {
+    gil_function_requires<ImageConcept<rgb8_image_t> >();
+
+    static_assert(view_is_basic<rgb8_step_view_t>::value, "");
+    static_assert(view_is_basic<cmyk8c_planar_step_view_t>::value, "");
+    static_assert(view_is_basic<rgb8_planar_view_t>::value, "");
+
+    static_assert(view_is_step_in_x<rgb8_step_view_t>::value, "");
+    static_assert(view_is_step_in_x<cmyk8c_planar_step_view_t>::value, "");
+    static_assert(!view_is_step_in_x<rgb8_planar_view_t>::value, "");
+
+    static_assert(!is_planar<rgb8_step_view_t>::value, "");
+    static_assert(is_planar<cmyk8c_planar_step_view_t>::value, "");
+    static_assert(is_planar<rgb8_planar_view_t>::value, "");
+
+    static_assert(view_is_mutable<rgb8_step_view_t>::value, "");
+    static_assert(!view_is_mutable<cmyk8c_planar_step_view_t>::value, "");
+    static_assert(view_is_mutable<rgb8_planar_view_t>::value, "");
+
+    static_assert(std::is_same
+        <
+            derived_view_type<cmyk8c_planar_step_view_t>::type,
+            cmyk8c_planar_step_view_t
+        >::value, "");
+    static_assert(std::is_same
+        <
+            derived_view_type
+            <
+                cmyk8c_planar_step_view_t, std::uint16_t, rgb_layout_t
+            >::type,
+            rgb16c_planar_step_view_t
+        >::value, "");
+    static_assert(std::is_same
+        <
+            derived_view_type
+            <
+                cmyk8c_planar_step_view_t, use_default, rgb_layout_t, std::false_type, use_default, std::false_type
+            >::type,
+            rgb8c_step_view_t
+        >::value, "");
+
+    // test view get raw data (mostly compile-time test)
+    {
+    rgb8_image_t rgb8(100,100);
+    unsigned char* data=interleaved_view_get_raw_data(view(rgb8));
+    const unsigned char* cdata=interleaved_view_get_raw_data(const_view(rgb8));
+    error_if(data!=cdata);
+    }
+
+    {
+    rgb16s_planar_image_t rgb8(100,100);
+    short* data=planar_view_get_raw_data(view(rgb8),1);
+    const short* cdata=planar_view_get_raw_data(const_view(rgb8),1);
+    error_if(data!=cdata);
+    }
+}
+
+using image_test_t = checksum_image_test;
+using image_generate_t = checksum_image_generate;
+
+#ifdef BOOST_GIL_GENERATE_REFERENCE_DATA
+using image_mgr_t = image_generate_t;
+#else
+using image_mgr_t = image_test_t;
+#endif
+
+void test_image(const char* ref_checksum) {
+    image_mgr_t mgr(ref_checksum);
+
+    cerr << "Reading checksums from " << ref_checksum << endl;
+    mgr.run();
+    static_checks();
+}
+
+int main(int argc, char* argv[])
+{
+    try
+    {
+        if (argc != 2)
+            throw std::runtime_error("No file with reference checksums specified");
+
+        std::string local_name = argv[1];
+        std::ifstream file_is_there(local_name.c_str());
+        if (!file_is_there)
+            throw std::runtime_error("Unable to open gil_reference_checksums.txt");
+
+        test_image(local_name.c_str());
+
+        return EXIT_SUCCESS;
+    }
+    catch (std::exception const& e)
+    {
+        std::cerr << e.what() << std::endl;
+        return EXIT_FAILURE;
+    }
+    catch (...)
+    {
+        return EXIT_FAILURE;
+    }
+}
diff --git a/src/boost/libs/gil/test/legacy/performance.cpp b/src/boost/libs/gil/test/legacy/performance.cpp
new file mode 100644
index 000000000..31a35de15
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/performance.cpp
@@ -0,0 +1,520 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <cstddef>
+#include <ctime>
+#include <iostream>
+
+// GIL performance test suite
+//
+// Available tests:
+//    fill_pixels() on rgb8_image_t with rgb8_pixel_t
+//    fill_pixels() on rgb8_planar_image_t with rgb8_pixel_t
+//    fill_pixels() on rgb8_image_t with bgr8_pixel_t
+//    fill_pixels() on rgb8_planar_image_t with bgr8_pixel_t
+//    for_each_pixel() on rgb8_image_t
+//    for_each_pixel() on rgb8_planar_t
+//    copy_pixels() between rgb8_image_t and rgb8_image_t
+//    copy_pixels() between rgb8_image_t and bgr8_image_t
+//    copy_pixels() between rgb8_planar_image_t and rgb8_planar_image_t
+//    copy_pixels() between rgb8_image_t and rgb8_planar_image_t
+//    copy_pixels() between rgb8_planar_image_t and rgb8_image_t
+//    transform_pixels() between rgb8_image_t and rgb8_image_t
+//    transform_pixels() between rgb8_planar_image_t and rgb8_planar_image_t
+//    transform_pixels() between rgb8_planar_image_t and rgb8_image_t
+//    transform_pixels() between rgb8_image_t and rgb8_planar_image_t
+
+using namespace boost::gil;
+
+// returns time in milliseconds per call
+template <typename Op>
+double measure_time(Op op, std::size_t num_loops) {
+    clock_t begin=clock();
+    for (std::size_t ii=0; ii<num_loops; ++ii) op();
+    return double(clock()-begin)/double(num_loops);
+}
+
+// image dimension
+std::size_t width=1000, height=400;
+
+// macros for standard GIL views
+#define RGB_VIEW(T) image_view<memory_based_2d_locator<memory_based_step_iterator<pixel<T,rgb_layout_t>*>>>
+#define BGR_VIEW(T) image_view<memory_based_2d_locator<memory_based_step_iterator<pixel<T,bgr_layout_t>*>>>
+#define RGB_PLANAR_VIEW(T) image_view<memory_based_2d_locator<memory_based_step_iterator<planar_pixel_iterator<T*,rgb_t>>>>
+
+template <typename View, typename P>
+struct fill_gil_t {
+    View _v;
+    P _p;
+    fill_gil_t(const View& v_in,const P& p_in) : _v(v_in), _p(p_in) {}
+    void operator()() const {fill_pixels(_v,_p);}
+};
+template <typename View, typename P> struct fill_nongil_t;
+template <typename T, typename P>
+struct fill_nongil_t<RGB_VIEW(T), P>
+{
+    using View = RGB_VIEW(T);
+    View _v;
+    P _p;
+    fill_nongil_t(const View& v_in,const P& p_in) : _v(v_in), _p(p_in) {}
+    void operator()() const {
+        T* first=(T*)_v.row_begin(0);
+        T* last=first+_v.size()*3;
+        while(first!=last) {
+            first[0]=boost::gil::at_c<0>(_p);
+            first[1]=boost::gil::at_c<1>(_p);
+            first[2]=boost::gil::at_c<2>(_p);
+            first+=3;
+        }
+    }
+};
+template <typename T1, typename T2>
+struct fill_nongil_t<RGB_VIEW(T1), pixel<T2,bgr_layout_t>>
+{
+    using View = RGB_VIEW(T1);
+    using P = pixel<T2, bgr_layout_t>;
+    View _v;
+    P _p;
+    fill_nongil_t(const View& v_in,const P& p_in) : _v(v_in), _p(p_in) {}
+    void operator()() const {
+        T1* first=(T1*)_v.row_begin(0);
+        T1* last=first+_v.size()*3;
+        while(first!=last) {
+            first[0]=boost::gil::at_c<2>(_p);
+            first[1]=boost::gil::at_c<1>(_p);
+            first[2]=boost::gil::at_c<0>(_p);
+            first+=3;
+        }
+    }
+};
+template <typename T1, typename T2>
+struct fill_nongil_t<RGB_PLANAR_VIEW(T1), pixel<T2,rgb_layout_t>>
+{
+    using View =  RGB_PLANAR_VIEW(T1);
+    using P = pixel<T2, rgb_layout_t>;
+    View _v;
+    P _p;
+    fill_nongil_t(const View& v_in,const P& p_in) : _v(v_in), _p(p_in) {}
+    void operator()() const {
+        std::size_t size=_v.size();
+        T1* first;
+        first=(T1*)boost::gil::at_c<0>(_v.row_begin(0));
+        std::fill(first,first+size,boost::gil::at_c<0>(_p));
+        first=(T1*)boost::gil::at_c<1>(_v.row_begin(0));
+        std::fill(first,first+size,boost::gil::at_c<1>(_p));
+        first=(T1*)boost::gil::at_c<2>(_v.row_begin(0));
+        std::fill(first,first+size,boost::gil::at_c<2>(_p));
+    }
+};
+
+template <typename T1, typename T2>
+struct fill_nongil_t<RGB_PLANAR_VIEW(T1), pixel<T2,bgr_layout_t>>
+{
+    using View = RGB_PLANAR_VIEW(T1);
+    using P = pixel<T2,bgr_layout_t>;
+    View _v;
+    P _p;
+    fill_nongil_t(const View& v_in,const P& p_in) : _v(v_in), _p(p_in) {}
+    void operator()() const {
+        std::size_t size=_v.size();
+        T1* first;
+        first=(T1*)boost::gil::at_c<0>(_v.row_begin(0));
+        std::fill(first,first+size,boost::gil::at_c<2>(_p));
+        first=(T1*)boost::gil::at_c<1>(_v.row_begin(0));
+        std::fill(first,first+size,boost::gil::at_c<1>(_p));
+        first=(T1*)boost::gil::at_c<2>(_v.row_begin(0));
+        std::fill(first,first+size,boost::gil::at_c<1>(_p));
+    }
+};
+
+template <typename View, typename P>
+void test_fill(std::size_t trials) {
+    image<typename View::value_type, is_planar<View>::value> im(width,height);
+    std::cout << "GIL: "<< measure_time(fill_gil_t<View,P>(view(im),P()),trials) << std::endl;
+    std::cout << "Non-GIL: "<< measure_time(fill_nongil_t<View,P>(view(im),P()),trials) << std::endl;
+};
+
+template <typename T>
+struct rgb_fr_t {
+    void operator()(pixel<T,rgb_layout_t>& p) const {p[0]=0;p[1]=1;p[2]=2;}
+    void operator()(const planar_pixel_reference<T&,rgb_t>& p) const {p[0]=0;p[1]=1;p[2]=2;}
+};
+template <typename View, typename F>
+struct for_each_gil_t {
+    View _v;
+    F _f;
+    for_each_gil_t(const View& v_in,const F& f_in) : _v(v_in), _f(f_in) {}
+    void operator()() const {for_each_pixel(_v,_f);}
+};
+template <typename View, typename F> struct for_each_nongil_t;
+template <typename T, typename T2>
+struct for_each_nongil_t<RGB_VIEW(T), rgb_fr_t<T2>>
+{
+    using View = RGB_VIEW(T);
+    using F = rgb_fr_t<T2>;
+    View _v;
+    F _f;
+    for_each_nongil_t(const View& v_in,const F& f_in) : _v(v_in), _f(f_in) {}
+    void operator()() const {
+        T* first=(T*)_v.row_begin(0);
+        T* last=first+_v.size()*3;
+        while(first!=last) {
+            first[0]=0;
+            first[1]=1;
+            first[2]=2;
+            first+=3;
+        }
+    }
+};
+template <typename T1, typename T2>
+struct for_each_nongil_t<RGB_PLANAR_VIEW(T1), rgb_fr_t<T2>>
+{
+    using View = RGB_PLANAR_VIEW(T1);
+    using F = rgb_fr_t<T2>;
+    View _v;
+    F _f;
+    for_each_nongil_t(const View& v_in,const F& f_in) : _v(v_in), _f(f_in) {}
+    void operator()() const {
+        T1 *first0, *first1, *first2, *last0;
+        first0=(T1*)boost::gil::at_c<0>(_v.row_begin(0));
+        first1=(T1*)boost::gil::at_c<1>(_v.row_begin(0));
+        first2=(T1*)boost::gil::at_c<2>(_v.row_begin(0));
+        last0=first0+_v.size();
+        while(first0!=last0) {
+            *first0++=0;
+            *first1++=1;
+            *first2++=2;
+        }
+    }
+};
+
+template <typename View, typename F>
+void test_for_each(std::size_t trials) {
+    image<typename View::value_type, is_planar<View>::value> im(width,height);
+    std::cout << "GIL: "<<measure_time(for_each_gil_t<View,F>(view(im),F()),trials) << std::endl;
+    std::cout << "Non-GIL: "<<measure_time(for_each_nongil_t<View,F>(view(im),F()),trials) << std::endl;
+}
+
+// copy
+template <typename View1, typename View2>
+struct copy_gil_t {
+    View1 _v1;
+    View2 _v2;
+    copy_gil_t(const View1& v1_in,const View2& v2_in) : _v1(v1_in), _v2(v2_in) {}
+    void operator()() const {copy_pixels(_v1,_v2);}
+};
+template <typename View1, typename View2> struct copy_nongil_t;
+template <typename T1, typename T2>
+struct copy_nongil_t<RGB_VIEW(T1),RGB_VIEW(T2)>
+{
+    using View1 = RGB_VIEW(T1);
+    using View2 = RGB_VIEW(T2);
+    View1 _v1;
+    View2 _v2;
+    copy_nongil_t(const View1& v1_in,const View2& v2_in) : _v1(v1_in), _v2(v2_in) {}
+    void operator()() const {
+        T1* first1=(T1*)_v1.row_begin(0);
+        T1* last1=first1+_v1.size()*3;
+        T2* first2=(T2*)_v2.row_begin(0);
+        std::copy(first1,last1,first2);
+    }
+};
+template <typename T1, typename T2>
+struct copy_nongil_t<RGB_VIEW(T1),BGR_VIEW(T2)>
+{
+    using View1 = RGB_VIEW(T1);
+    using View2 = BGR_VIEW(T2);
+    View1 _v1;
+    View2 _v2;
+    copy_nongil_t(const View1& v1_in,const View2& v2_in) : _v1(v1_in), _v2(v2_in) {}
+    void operator()() const {
+        T1* first1=(T1*)_v1.row_begin(0);
+        T1* last1=first1+_v1.size()*3;
+        T2* first2=(T2*)_v2.row_begin(0);
+        while(first1!=last1) {
+            first2[2]=first1[0];
+            first2[1]=first1[1];
+            first2[0]=first1[2];
+            first1+=3; first2+=3;
+        }
+    }
+};
+template <typename T1, typename T2>
+struct copy_nongil_t<RGB_PLANAR_VIEW(T1),RGB_PLANAR_VIEW(T2)>
+{
+    using View1 = RGB_PLANAR_VIEW(T1);
+    using View2 = RGB_PLANAR_VIEW(T2);
+    View1 _v1;
+    View2 _v2;
+    copy_nongil_t(const View1& v1_in,const View2& v2_in) : _v1(v1_in), _v2(v2_in) {}
+    void operator()() const {
+        std::size_t size=_v1.size();
+        T1* first10=(T1*)boost::gil::at_c<0>(_v1.row_begin(0));
+        T1* first11=(T1*)boost::gil::at_c<1>(_v1.row_begin(0));
+        T1* first12=(T1*)boost::gil::at_c<2>(_v1.row_begin(0));
+        T2* first20=(T2*)boost::gil::at_c<0>(_v2.row_begin(0));
+        T2* first21=(T2*)boost::gil::at_c<1>(_v2.row_begin(0));
+        T2* first22=(T2*)boost::gil::at_c<2>(_v2.row_begin(0));
+        std::copy(first10,first10+size,first20);
+        std::copy(first11,first11+size,first21);
+        std::copy(first12,first12+size,first22);
+    }
+};
+template <typename T1, typename T2>
+struct copy_nongil_t<RGB_VIEW(T1),RGB_PLANAR_VIEW(T2)>
+{
+    using View1 = RGB_VIEW(T1);
+    using View2 = RGB_PLANAR_VIEW(T2);
+    View1 _v1;
+    View2 _v2;
+    copy_nongil_t(const View1& v1_in,const View2& v2_in) : _v1(v1_in), _v2(v2_in) {}
+    void operator()() const {
+        T1* first=(T1*)_v1.row_begin(0);
+        T1* last=first+_v1.size()*3;
+        T2* first0=(T2*)boost::gil::at_c<0>(_v2.row_begin(0));
+        T2* first1=(T2*)boost::gil::at_c<1>(_v2.row_begin(0));
+        T2* first2=(T2*)boost::gil::at_c<2>(_v2.row_begin(0));
+        while(first!=last) {
+            *first0++=first[0];
+            *first1++=first[1];
+            *first2++=first[2];
+            first+=3;
+        }
+    }
+};
+template <typename T1, typename T2>
+struct copy_nongil_t<RGB_PLANAR_VIEW(T1),RGB_VIEW(T2)>
+{
+    using View1 = RGB_PLANAR_VIEW(T1);
+    using View2 = RGB_VIEW(T2);
+    View1 _v1;
+    View2 _v2;
+    copy_nongil_t(const View1& v1_in,const View2& v2_in) : _v1(v1_in), _v2(v2_in) {}
+    void operator()() const {
+        T1* first=(T1*)_v2.row_begin(0);
+        T1* last=first+_v2.size()*3;
+        T2* first0=(T2*)boost::gil::at_c<0>(_v1.row_begin(0));
+        T2* first1=(T2*)boost::gil::at_c<1>(_v1.row_begin(0));
+        T2* first2=(T2*)boost::gil::at_c<2>(_v1.row_begin(0));
+        while(first!=last) {
+            first[0]=*first0++;
+            first[1]=*first1++;
+            first[2]=*first2++;
+            first+=3;
+        }
+    }
+};
+template <typename View1, typename View2>
+void test_copy(std::size_t trials) {
+    image<typename View1::value_type, is_planar<View1>::value> im1(width,height);
+    image<typename View2::value_type, is_planar<View2>::value> im2(width,height);
+    std::cout << "GIL: "    <<measure_time(copy_gil_t<View1,View2>(view(im1),view(im2)),trials) << std::endl;
+    std::cout << "Non-GIL: "<<measure_time(copy_nongil_t<View1,View2>(view(im1),view(im2)),trials) << std::endl;
+}
+
+// transform()
+template <typename T,typename Pixel>
+struct bgr_to_rgb_t {
+    pixel<T,rgb_layout_t> operator()(const Pixel& p) const {
+        return pixel<T,rgb_layout_t>(T(get_color(p,blue_t())*0.1f),
+                                     T(get_color(p,green_t())*0.2f),
+                                     T(get_color(p,red_t())*0.3f));
+    }
+};
+template <typename View1, typename View2, typename F>
+struct transform_gil_t {
+    View1 _v1;
+    View2 _v2;
+    F _f;
+    transform_gil_t(const View1& v1_in,const View2& v2_in,const F& f_in) : _v1(v1_in),_v2(v2_in),_f(f_in) {}
+    void operator()() const {transform_pixels(_v1,_v2,_f);}
+};
+template <typename View1, typename View2, typename F> struct transform_nongil_t;
+template <typename T1, typename T2, typename F>
+struct transform_nongil_t<RGB_VIEW(T1),RGB_VIEW(T2),F>
+{
+    using View1 = RGB_VIEW(T1);
+    using View2 = RGB_VIEW(T2);
+    View1 _v1;
+    View2 _v2;
+    F _f;
+    transform_nongil_t(const View1& v1_in,const View2& v2_in,const F& f_in) : _v1(v1_in),_v2(v2_in),_f(f_in) {}
+    void operator()() const {
+        T1* first1=(T1*)_v1.row_begin(0);
+        T2* first2=(T1*)_v2.row_begin(0);
+        T1* last1=first1+_v1.size()*3;
+        while(first1!=last1) {
+            first2[0]=T2(first1[2]*0.1f);
+            first2[1]=T2(first1[1]*0.2f);
+            first2[2]=T2(first1[0]*0.3f);
+            first1+=3; first2+=3;
+        }
+    }
+};
+template <typename T1, typename T2, typename F>
+struct transform_nongil_t<RGB_PLANAR_VIEW(T1),RGB_PLANAR_VIEW(T2),F>
+{
+    using View1 = RGB_PLANAR_VIEW(T1);
+    using View2 = RGB_PLANAR_VIEW(T2);
+    View1 _v1;
+    View2 _v2;
+    F _f;
+    transform_nongil_t(const View1& v1_in,const View2& v2_in,const F& f_in) : _v1(v1_in),_v2(v2_in),_f(f_in) {}
+    void operator()() const {
+        T1* first10=(T1*)boost::gil::at_c<0>(_v1.row_begin(0));
+        T1* first11=(T1*)boost::gil::at_c<1>(_v1.row_begin(0));
+        T1* first12=(T1*)boost::gil::at_c<2>(_v1.row_begin(0));
+        T1* first20=(T2*)boost::gil::at_c<0>(_v2.row_begin(0));
+        T1* first21=(T2*)boost::gil::at_c<1>(_v2.row_begin(0));
+        T1* first22=(T2*)boost::gil::at_c<2>(_v2.row_begin(0));
+        T1* last10=first10+_v1.size();
+        while(first10!=last10) {
+            *first20++=T2(*first12++*0.1f);
+            *first21++=T2(*first11++*0.2f);
+            *first22++=T2(*first10++*0.3f);
+        }
+    }
+};
+template <typename T1, typename T2, typename F>
+struct transform_nongil_t<RGB_VIEW(T1),RGB_PLANAR_VIEW(T2),F>
+{
+    using View1 = RGB_VIEW(T1);
+    using View2 = RGB_PLANAR_VIEW(T2);
+    View1 _v1;
+    View2 _v2;
+    F _f;
+    transform_nongil_t(const View1& v1_in,const View2& v2_in,const F& f_in) : _v1(v1_in),_v2(v2_in),_f(f_in) {}
+    void operator()() const {
+        T1* first1=(T1*)_v1.row_begin(0);
+        T1* last1=first1+_v1.size()*3;
+        T1* first20=(T2*)boost::gil::at_c<0>(_v2.row_begin(0));
+        T1* first21=(T2*)boost::gil::at_c<1>(_v2.row_begin(0));
+        T1* first22=(T2*)boost::gil::at_c<2>(_v2.row_begin(0));
+        while(first1!=last1) {
+            *first20++=T2(first1[2]*0.1f);
+            *first21++=T2(first1[1]*0.2f);
+            *first22++=T2(first1[0]*0.3f);
+            first1+=3;
+        }
+    }
+};
+template <typename T1, typename T2, typename F>
+struct transform_nongil_t<RGB_PLANAR_VIEW(T1),RGB_VIEW(T2),F>
+{
+    using View1 = RGB_PLANAR_VIEW(T1);
+    using View2 = RGB_VIEW(T2);
+    View1 _v1;
+    View2 _v2;
+    F _f;
+    transform_nongil_t(const View1& v1_in,const View2& v2_in,const F& f_in) : _v1(v1_in),_v2(v2_in),_f(f_in) {}
+    void operator()() const {
+        T1* first10=(T1*)boost::gil::at_c<0>(_v1.row_begin(0));
+        T1* first11=(T1*)boost::gil::at_c<1>(_v1.row_begin(0));
+        T1* first12=(T1*)boost::gil::at_c<2>(_v1.row_begin(0));
+        T2* first2=(T1*)_v2.row_begin(0);
+        T1* last2=first2+_v1.size()*3;
+        while(first2!=last2) {
+            first2[0]=T2(*first12++*0.1f);
+            first2[1]=T2(*first11++*0.2f);
+            first2[2]=T2(*first10++*0.3f);
+            first2+=3;
+        }
+    }
+};
+
+template <typename View1, typename View2, typename F>
+void test_transform(std::size_t trials) {
+    image<typename View1::value_type, is_planar<View1>::value> im1(width,height);
+    image<typename View2::value_type, is_planar<View2>::value> im2(width,height);
+    //std::cout << "GIL: "    <<measure_time(transform_gil_t<View1,View2,F>(view(im1),view(im2),F()),trials) << std::endl;
+    //std::cout << "Non-GIL: "<<measure_time(transform_nongil_t<View1,View2,F>(view(im1),view(im2),F()),trials) << std::endl;
+}
+
+void test_performance()
+{
+#ifdef NDEBUG
+    std::size_t num_trials=1000;
+#else
+    std::size_t num_trials=1;
+#endif
+
+    // fill()
+    std::cout<<"test fill_pixels() on rgb8_image_t with rgb8_pixel_t"<<std::endl;
+    test_fill<rgb8_view_t,rgb8_pixel_t>(num_trials);
+    std::cout<<std::endl;
+
+    std::cout<<"test fill_pixels() on rgb8_planar_image_t with rgb8_pixel_t"<<std::endl;
+    test_fill<rgb8_planar_view_t,rgb8_pixel_t>(num_trials);
+    std::cout<<std::endl;
+
+    std::cout<<"test fill_pixels() on rgb8_image_t with bgr8_pixel_t"<<std::endl;
+    test_fill<rgb8_view_t,bgr8_pixel_t>(num_trials);
+    std::cout<<std::endl;
+
+    std::cout<<"test fill_pixels() on rgb8_planar_image_t with bgr8_pixel_t"<<std::endl;
+    test_fill<rgb8_planar_view_t,bgr8_pixel_t>(num_trials);
+    std::cout<<std::endl;
+
+    // for_each()
+    std::cout<<"test for_each_pixel() on rgb8_image_t"<<std::endl;
+    test_for_each<rgb8_view_t,rgb_fr_t<uint8_t> >(num_trials);
+    std::cout<<std::endl;
+
+    std::cout<<"test for_each_pixel() on rgb8_planar_image_t"<<std::endl;
+    test_for_each<rgb8_planar_view_t,rgb_fr_t<uint8_t> >(num_trials);
+    std::cout<<std::endl;
+
+    // copy()
+    std::cout<<"test copy_pixels() between rgb8_image_t and rgb8_image_t"<<std::endl;
+    test_copy<rgb8_view_t,rgb8_view_t>(num_trials);
+    std::cout<<std::endl;
+
+    std::cout<<"test copy_pixels() between rgb8_image_t and bgr8_image_t"<<std::endl;
+    test_copy<rgb8_view_t,bgr8_view_t>(num_trials);
+    std::cout<<std::endl;
+
+    std::cout<<"test copy_pixels() between rgb8_planar_image_t and rgb8_planar_image_t"<<std::endl;
+    test_copy<rgb8_planar_view_t,rgb8_planar_view_t>(num_trials);
+    std::cout<<std::endl;
+
+    std::cout<<"test copy_pixels() between rgb8_image_t and rgb8_planar_image_t"<<std::endl;
+    test_copy<rgb8_view_t,rgb8_planar_view_t>(num_trials);
+    std::cout<<std::endl;
+
+    std::cout<<"test copy_pixels() between rgb8_planar_image_t and rgb8_image_t"<<std::endl;
+    test_copy<rgb8_planar_view_t,rgb8_view_t>(num_trials);
+    std::cout<<std::endl;
+
+    // transform()
+    std::cout<<"test transform_pixels() between rgb8_image_t and rgb8_image_t"<<std::endl;
+    test_transform<rgb8_view_t,rgb8_view_t,bgr_to_rgb_t<uint8_t,pixel<uint8_t,rgb_layout_t> > >(num_trials);
+    std::cout<<std::endl;
+
+    std::cout<<"test transform_pixels() between rgb8_planar_image_t and rgb8_planar_image_t"<<std::endl;
+    test_transform<rgb8_planar_view_t,rgb8_planar_view_t,bgr_to_rgb_t<uint8_t,planar_pixel_reference<uint8_t,rgb_t> > >(num_trials);
+    std::cout<<std::endl;
+
+    std::cout<<"test transform_pixels() between rgb8_image_t and rgb8_planar_image_t"<<std::endl;
+    test_transform<rgb8_view_t,rgb8_planar_view_t,bgr_to_rgb_t<uint8_t,pixel<uint8_t,rgb_layout_t> > >(num_trials);
+    std::cout<<std::endl;
+
+    std::cout<<"test transform_pixels() between rgb8_planar_image_t and rgb8_image_t"<<std::endl;
+    test_transform<rgb8_planar_view_t,rgb8_view_t,bgr_to_rgb_t<uint8_t,planar_pixel_reference<uint8_t,rgb_t> > >(num_trials);
+    std::cout<<std::endl;
+}
+
+int main()
+{
+
+    test_performance();
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/legacy/pixel.cpp b/src/boost/libs/gil/test/legacy/pixel.cpp
new file mode 100644
index 000000000..743f1b157
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/pixel.cpp
@@ -0,0 +1,322 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+#include <boost/core/ignore_unused.hpp>
+#include <boost/mp11.hpp>
+
+#include <exception>
+#include <iostream>
+#include <iterator>
+#include <type_traits>
+
+using namespace boost::gil;
+using std::swap;
+using namespace boost;
+
+void error_if(bool condition);
+
+struct increment {
+    template <typename Incrementable> void operator()(Incrementable& x) const { ++x; }
+};
+
+struct prev
+{
+    template <typename Subtractable>
+    auto operator()(const Subtractable& x) const -> typename channel_traits<Subtractable>::value_type
+    {
+        using return_type = typename channel_traits<Subtractable>::value_type;
+        return static_cast<return_type>(x - 1);
+    }
+};
+
+struct set_to_one{ int operator()() const { return 1; } };
+
+// Construct with two pixel types. They must be compatible and the second must be mutable
+template <typename C1, typename C2>
+struct do_basic_test : public C1, public C2
+{
+    using pixel1_t = typename C1::type;
+    using pixel2_t = typename C2::type;
+    using pixel1_value_t = typename C1::pixel_t::value_type;
+    using pixel2_value_t = typename C2::pixel_t::value_type;
+    using pixel_value_t = pixel1_value_t;
+
+    do_basic_test(const pixel_value_t& v) : C1(v), C2(v) {}
+
+    void test_all() {
+        test_heterogeneous();
+
+        // test homogeneous algorithms - fill, max, min
+        static const int num_chan = num_channels<typename C2::pixel_t>::value;
+        static_fill(C2::_pixel, gil::at_c<0>(C1::_pixel)+1);
+        error_if(gil::at_c<0>(C2::_pixel) != gil::at_c<num_chan-1>(C2::_pixel));
+
+        C2::_pixel = C1::_pixel;
+        error_if(static_max(C2::_pixel) != static_max(C1::_pixel));
+        error_if(static_min(C2::_pixel) != static_min(C1::_pixel));
+        error_if(static_max(C2::_pixel) < static_min(C2::_pixel));
+
+        // test operator[]
+        C2::_pixel[0] = C1::_pixel[0]+1;
+        error_if(C2::_pixel[0] != C1::_pixel[0]+1);
+    }
+
+    void test_heterogeneous() {
+        // Both must be pixel types (not necessarily pixel values). The second must be mutable. They must be compatible
+        boost::function_requires<PixelConcept<typename C1::pixel_t> >();
+        boost::function_requires<MutablePixelConcept<typename C2::pixel_t> >();
+        boost::function_requires<PixelsCompatibleConcept<typename C1::pixel_t,typename C2::pixel_t> >();
+
+        C2::_pixel = C1::_pixel;            // test operator=
+        error_if(C1::_pixel != C2::_pixel);   // test operator==
+
+        // construct a pixel value from it
+        pixel1_value_t v1(C1::_pixel);
+        pixel2_value_t v2(C2::_pixel);
+        error_if(v1 != v2);
+
+        // construct from a pixel value
+        pixel1_t c1(v1);
+        pixel2_t c2(v2);
+        error_if(c1 != c2);
+
+        // Invert the first semantic channel.
+        C2::_pixel = C1::_pixel;
+        semantic_at_c<0>(C2::_pixel) = channel_invert(semantic_at_c<0>(C2::_pixel));
+        error_if(C1::_pixel == C2::_pixel);   // now they must not be equal
+
+        // test pixel algorithms
+        C2::_pixel = C1::_pixel;
+        static_for_each(C2::_pixel, increment());
+        static_transform(C2::_pixel, C2::_pixel, prev());
+        error_if(C1::_pixel!=C2::_pixel);
+
+        static_generate(C2::_pixel, set_to_one());
+        error_if(gil::at_c<0>(C2::_pixel) != 1);
+
+        // Test swap if both are mutable and if their value type is the same
+        // (We know the second one is mutable)
+        using p1_ref = typename boost::add_reference<typename C1::type>::type;
+        using is_swappable = std::integral_constant
+            <
+                bool,
+                pixel_reference_is_mutable<p1_ref>::value &&
+                std::is_same<pixel1_value_t, pixel2_value_t>::value
+            >;
+        test_swap(is_swappable{});
+    }
+
+    void test_swap(std::false_type) {}
+    void test_swap(std::true_type) {
+        // test swap
+        static_fill(C1::_pixel, 0);
+        static_fill(C2::_pixel, 1);
+        pixel_value_t pv1(C1::_pixel);
+        pixel_value_t pv2(C2::_pixel);
+        error_if(C2::_pixel == C1::_pixel);
+        swap(C1::_pixel, C2::_pixel);
+        error_if(C1::_pixel != pv2 || C2::_pixel != pv1);
+    }
+};
+
+template <typename PixelValue, int Tag=0>
+class value_core
+{
+public:
+    using type = PixelValue;
+    using pixel_t = type;
+    type _pixel;
+
+    value_core() : _pixel(0) {}
+    value_core(const type& val) : _pixel(val) {  // test copy constructor
+        boost::function_requires<PixelValueConcept<pixel_t> >();
+        type p2;            // test default constructor
+        boost::ignore_unused(p2);
+    }
+};
+
+template <typename PixelRef, int Tag=0>
+class reference_core : public value_core<typename std::remove_reference<PixelRef>::type::value_type, Tag>
+{
+public:
+    using type = PixelRef;
+    using pixel_t = typename std::remove_reference<PixelRef>::type;
+    using parent_t = value_core<typename pixel_t::value_type, Tag>;
+
+    type _pixel;
+
+    reference_core() : parent_t(), _pixel(parent_t::_pixel) {}
+    reference_core(const typename pixel_t::value_type& val) : parent_t(val), _pixel(parent_t::_pixel) {
+        boost::function_requires<PixelConcept<pixel_t> >();
+    }
+};
+
+// Use a subset of pixel models that covers all color spaces, channel depths, reference/value, planar/interleaved, const/mutable
+// color conversion will be invoked on pairs of them. Having an exhaustive binary check would be too big/expensive.
+using representative_pixels_t = mp11::mp_list
+<
+    value_core<gray8_pixel_t>,
+    reference_core<gray16_pixel_t&>,
+    value_core<bgr8_pixel_t>,
+    reference_core<rgb8_planar_ref_t>,
+    value_core<argb32_pixel_t>,
+    reference_core<cmyk32f_pixel_t&>,
+    reference_core<abgr16c_ref_t>,           // immutable reference
+    reference_core<rgb32fc_planar_ref_t>
+>;
+
+template <typename Pixel1>
+struct ccv2 {
+    template <typename P1, typename P2>
+    void color_convert_compatible(const P1& p1, P2& p2, std::true_type) {
+        using value_t = typename P1::value_type;
+        p2 = p1;
+        value_t converted;
+        color_convert(p1, converted);
+        error_if(converted != p2);
+    }
+
+    template <typename P1, typename P2>
+    void color_convert_compatible(const P1& p1, P2& p2, std::false_type) {
+        color_convert(p1,p2);
+    }
+
+    template <typename P1, typename P2>
+    void color_convert_impl(const P1& p1, P2& p2) {
+        using is_compatible = typename pixels_are_compatible<P1,P2>::type;
+        color_convert_compatible(p1, p2, is_compatible());
+    }
+
+    template <typename Pixel2>
+    void operator()(Pixel2) {
+        // convert from Pixel1 to Pixel2 (or, if Pixel2 is immutable, to its value type)
+        using p2_is_mutable = pixel_reference_is_mutable<typename Pixel2::type>;
+        using pixel_model_t = typename std::remove_reference<typename Pixel2::type>::type;
+        using p2_value_t = typename pixel_model_t::value_type;
+        using pixel2_mutable = mp11::mp_if<p2_is_mutable, Pixel2, value_core<p2_value_t>>;
+
+        Pixel1 p1;
+        pixel2_mutable p2;
+
+        color_convert_impl(p1._pixel, p2._pixel);
+    }
+};
+
+struct ccv1 {
+    template <typename Pixel>
+    void operator()(Pixel) {
+        mp11::mp_for_each<representative_pixels_t>(ccv2<Pixel>());
+    }
+};
+
+void test_color_convert() {
+   mp11::mp_for_each<representative_pixels_t>(ccv1());
+}
+
+void test_packed_pixel()
+{
+    using rgb565_pixel_t = packed_pixel_type<uint16_t, mp11::mp_list_c<unsigned,5,6,5>, rgb_layout_t>::type;
+    boost::function_requires<PixelValueConcept<rgb565_pixel_t> >();
+    static_assert(sizeof(rgb565_pixel_t) == 2, "");
+
+    // define a bgr556 pixel
+    using bgr556_pixel_t = packed_pixel_type<uint16_t, mp11::mp_list_c<unsigned,5,6,5>, bgr_layout_t>::type;
+    boost::function_requires<PixelValueConcept<bgr556_pixel_t> >();
+
+    // Create a zero packed pixel and a full regular unpacked pixel.
+    rgb565_pixel_t r565;//((uint16_t)0);
+    rgb8_pixel_t rgb_full(255,255,255);
+
+    // Convert all channels of the unpacked pixel to the packed one & ensure the packed one is full
+    get_color(r565,red_t())   = channel_convert<kth_element_type<rgb565_pixel_t, 0>::type>(get_color(rgb_full,red_t()));
+    get_color(r565,green_t()) = channel_convert<kth_element_type<rgb565_pixel_t, 1>::type>(get_color(rgb_full,green_t()));
+    get_color(r565,blue_t())  = channel_convert<kth_element_type<rgb565_pixel_t, 2>::type>(get_color(rgb_full,blue_t()));
+    error_if(r565 != rgb565_pixel_t((uint16_t)65535));
+
+    // rgb565 is compatible with bgr556. Test interoperability
+    boost::function_requires<PixelsCompatibleConcept<rgb565_pixel_t,bgr556_pixel_t> >();
+
+    do_basic_test<value_core<rgb565_pixel_t,0>, value_core<bgr556_pixel_t,1> >(r565).test_heterogeneous();
+
+    color_convert(r565,rgb_full);
+    color_convert(rgb_full,r565);
+
+    // Test bit-aligned pixel reference
+    using bgr121_ref_t = const bit_aligned_pixel_reference<std::uint8_t, mp11::mp_list_c<int,1,2,1>, bgr_layout_t, true>;
+    using rgb121_ref_t = const bit_aligned_pixel_reference<std::uint8_t, mp11::mp_list_c<int,1,2,1>, rgb_layout_t, true>;
+    using rgb121_pixel_t = rgb121_ref_t::value_type;
+    rgb121_pixel_t p121;
+    do_basic_test<reference_core<bgr121_ref_t,0>, reference_core<rgb121_ref_t,1> >(p121).test_heterogeneous();
+    do_basic_test<value_core<rgb121_pixel_t,0>, reference_core<rgb121_ref_t,1> >(p121).test_heterogeneous();
+
+    static_assert(pixel_reference_is_proxy<rgb8_planar_ref_t>::value, "");
+    static_assert(pixel_reference_is_proxy<bgr121_ref_t>::value, "");
+
+    static_assert(!pixel_reference_is_proxy<rgb8_pixel_t>::value, "");
+    static_assert(!pixel_reference_is_proxy<rgb8_pixel_t&>::value, "");
+    static_assert(!pixel_reference_is_proxy<rgb8_pixel_t const&>::value, "");
+
+    static_assert(pixel_reference_is_mutable<rgb8_pixel_t&>::value, "");
+    static_assert(!pixel_reference_is_mutable<rgb8_pixel_t const&>::value, "");
+
+    static_assert(pixel_reference_is_mutable<rgb8_planar_ref_t>::value, "");
+    static_assert(pixel_reference_is_mutable<rgb8_planar_ref_t const&>::value, "");
+
+    static_assert(!pixel_reference_is_mutable<rgb8c_planar_ref_t>::value, "");
+    static_assert(!pixel_reference_is_mutable<rgb8c_planar_ref_t const&>::value, "");
+
+    static_assert(pixel_reference_is_mutable<bgr121_ref_t>::value, "");
+    static_assert(!pixel_reference_is_mutable<bgr121_ref_t::const_reference>::value, "");
+}
+
+void test_pixel() {
+    test_packed_pixel();
+    rgb8_pixel_t rgb8(1,2,3);
+
+    do_basic_test<value_core<rgb8_pixel_t,0>, reference_core<rgb8_pixel_t&,1> >(rgb8).test_all();
+    do_basic_test<value_core<bgr8_pixel_t,0>, reference_core<rgb8_planar_ref_t,1> >(rgb8).test_all();
+    do_basic_test<reference_core<rgb8_planar_ref_t,0>, reference_core<bgr8_pixel_t&,1> >(rgb8).test_all();
+    do_basic_test<reference_core<const rgb8_pixel_t&,0>, reference_core<rgb8_pixel_t&,1> >(rgb8).test_all();
+
+    test_color_convert();
+
+    // Semantic vs physical channel accessors. Named channel accessors
+    bgr8_pixel_t bgr8(rgb8);
+    error_if(bgr8[0] == rgb8[0]);
+    error_if(dynamic_at_c(bgr8,0) == dynamic_at_c(rgb8,0));
+    error_if(gil::at_c<0>(bgr8) == gil::at_c<0>(rgb8));
+    error_if(semantic_at_c<0>(bgr8) != semantic_at_c<0>(rgb8));
+    error_if(get_color(bgr8,blue_t()) != get_color(rgb8,blue_t()));
+
+    // Assigning a grayscale channel to a pixel
+    gray16_pixel_t g16(34);
+    g16 = 8;
+    uint16_t g = get_color(g16,gray_color_t());
+    error_if(g != 8);
+    error_if(g16 != 8);
+}
+
+
+int main()
+{
+    try
+    {
+        test_pixel();
+        return EXIT_SUCCESS;
+    }
+    catch (std::exception const& e)
+    {
+        std::cerr << e.what() << std::endl;
+        return EXIT_FAILURE;
+    }
+    catch (...)
+    {
+        return EXIT_FAILURE;
+    }
+}
diff --git a/src/boost/libs/gil/test/legacy/pixel_iterator.cpp b/src/boost/libs/gil/test/legacy/pixel_iterator.cpp
new file mode 100644
index 000000000..1b4a6d2a4
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/pixel_iterator.cpp
@@ -0,0 +1,355 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifdef _MSC_VER
+#pragma warning(disable : 4244) // 'argument': conversion from 'int' to 'unsigned char', possible loss of data
+#endif
+
+#include <boost/gil.hpp>
+
+#include <boost/assert.hpp>
+#include <boost/mp11.hpp>
+
+#include <exception>
+#include <iostream>
+#include <type_traits>
+#include <vector>
+
+using namespace boost::gil;
+using namespace std;
+
+void test_pixel_iterator()
+{
+    boost::function_requires<Point2DConcept<point<int>>>();
+
+    boost::function_requires<MutablePixelIteratorConcept<bgr8_ptr_t> >();
+    boost::function_requires<MutablePixelIteratorConcept<cmyk8_planar_ptr_t> >();
+    boost::function_requires<PixelIteratorConcept<rgb8c_planar_step_ptr_t> >();
+    boost::function_requires<MutableStepIteratorConcept<rgb8_step_ptr_t> >();
+
+    boost::function_requires<MutablePixelLocatorConcept<rgb8_step_loc_t> >();
+    boost::function_requires<PixelLocatorConcept<rgb8c_planar_step_loc_t> >();
+
+    boost::function_requires<MutableStepIteratorConcept<cmyk8_planar_step_ptr_t> >();
+    boost::function_requires<StepIteratorConcept<gray8c_step_ptr_t> >();
+
+    boost::function_requires<MutablePixelLocatorConcept<memory_based_2d_locator<rgb8_step_ptr_t> > >();
+
+    using bgr121_ref_t = bit_aligned_pixel_reference
+        <
+            std::uint8_t,
+            boost::mp11::mp_list_c<int,1,2,1>,
+            bgr_layout_t,
+            true
+        > const;
+    using bgr121_ptr_t = bit_aligned_pixel_iterator<bgr121_ref_t>;
+
+    boost::function_requires<MutablePixelIteratorConcept<bgr121_ptr_t> >();
+    boost::function_requires<PixelBasedConcept<bgr121_ptr_t> >();
+    boost::function_requires<MemoryBasedIteratorConcept<bgr121_ptr_t> >();
+    boost::function_requires<HasDynamicXStepTypeConcept<bgr121_ptr_t> >();
+
+// TEST dynamic_step_t
+    static_assert(std::is_same<cmyk16_step_ptr_t, dynamic_x_step_type<cmyk16_step_ptr_t>::type>::value, "");
+    static_assert(std::is_same<cmyk16_planar_step_ptr_t, dynamic_x_step_type<cmyk16_planar_ptr_t>::type>::value, "");
+
+    static_assert(std::is_same<iterator_type<uint8_t,gray_layout_t,false,false,false>::type,gray8c_ptr_t>::value, "");
+
+// TEST iterator_is_step
+    static_assert(iterator_is_step<cmyk16_step_ptr_t>::value, "");
+    static_assert(iterator_is_step<cmyk16_planar_step_ptr_t>::value, "");
+    static_assert(!iterator_is_step<cmyk16_planar_ptr_t>::value, "");
+
+    using ccv_rgb_g_fn = color_convert_deref_fn<rgb8c_ref_t, gray8_pixel_t>;
+    using ccv_g_rgb_fn = color_convert_deref_fn<gray8c_ref_t, rgb8_pixel_t>;
+    gil_function_requires<PixelDereferenceAdaptorConcept<ccv_rgb_g_fn> >();
+    gil_function_requires<PixelDereferenceAdaptorConcept<deref_compose<ccv_rgb_g_fn,ccv_g_rgb_fn> > >();
+
+    using rgb2gray_ptr = dereference_iterator_adaptor<rgb8_ptr_t, ccv_rgb_g_fn>;
+    static_assert(!iterator_is_step<rgb2gray_ptr>::value, "");
+
+    using rgb2gray_step_ptr = dynamic_x_step_type<rgb2gray_ptr>::type;
+    static_assert(std::is_same<rgb2gray_step_ptr, dereference_iterator_adaptor<rgb8_step_ptr_t, ccv_rgb_g_fn>>::value, "");
+
+    make_step_iterator(rgb2gray_ptr(),2);
+
+    using rgb2gray_step_ptr1 = dereference_iterator_adaptor<rgb8_step_ptr_t, ccv_rgb_g_fn>;
+    static_assert(iterator_is_step<rgb2gray_step_ptr1>::value, "");
+    static_assert(std::is_same<rgb2gray_step_ptr1, dynamic_x_step_type<rgb2gray_step_ptr1>::type>::value, "");
+
+    using rgb2gray_step_ptr2 = memory_based_step_iterator<dereference_iterator_adaptor<rgb8_ptr_t, ccv_rgb_g_fn>>;
+    static_assert(iterator_is_step<rgb2gray_step_ptr2 >::value, "");
+    static_assert(std::is_same<rgb2gray_step_ptr2, dynamic_x_step_type<rgb2gray_step_ptr2>::type>::value, "");
+    make_step_iterator(rgb2gray_step_ptr2(),2);
+
+// bit_aligned iterators test
+
+    // Mutable reference to a BGR232 pixel
+    using bgr232_ref_t = bit_aligned_pixel_reference
+        <
+            std::uint8_t,
+            boost::mp11::mp_list_c<unsigned, 2, 3, 2>,
+            bgr_layout_t,
+            true
+        > const;
+
+    // A mutable iterator over BGR232 pixels
+    using bgr232_ptr_t = bit_aligned_pixel_iterator<bgr232_ref_t>;
+
+    // BGR232 pixel value. It is a packed_pixel of size 1 byte. (The last bit is unused)
+    using bgr232_pixel_t = std::iterator_traits<bgr232_ptr_t>::value_type;
+    static_assert(sizeof(bgr232_pixel_t) == 1, "");
+
+    bgr232_pixel_t red(0,0,3); // = 0RRGGGBB, = 01100000
+
+    // a buffer of 7 bytes fits exactly 8 BGR232 pixels.
+    unsigned char pix_buffer[7];
+    std::fill(pix_buffer,pix_buffer+7,0);
+    bgr232_ptr_t pix_it(&pix_buffer[0],0);  // start at bit 0 of the first pixel
+    for (int i=0; i<8; ++i) {
+        *pix_it++ = red;
+    }
+
+	// test cross byte pixel values - meaning when a pixel value is stretched over two bytes
+	using gray3_image_t = bit_aligned_image1_type<3, gray_layout_t>::type;
+    using image_t = gray3_image_t;
+
+    using view_t = image_t::view_t;
+    using ref_t = view_t::reference;
+
+    using iterator_t = bit_aligned_pixel_iterator<ref_t>;
+
+	std::vector< unsigned char > buf( 4 );
+	// bit pattern is: 1011 0110  0110 1101  1101 1011
+	// each byte is read right to left
+	buf[0] = 182;
+    buf[1] = 109;
+    buf[2] = 219;
+
+    iterator_t it( &buf[0], 0 );
+
+    ref_t p1 = *it; it++;
+    ref_t p2 = *it; it++;
+    ref_t p3 = *it; it++;
+    ref_t p4 = *it; it++;
+    ref_t p5 = *it; it++;
+    ref_t p6 = *it; it++;
+    ref_t p7 = *it; it++;
+    ref_t p8 = *it; it++;
+
+    unsigned char v1 = get_color( p1, gray_color_t() );
+    unsigned char v2 = get_color( p2, gray_color_t() );
+    unsigned char v3 = get_color( p3, gray_color_t() );
+    unsigned char v4 = get_color( p4, gray_color_t() );
+    unsigned char v5 = get_color( p5, gray_color_t() );
+    unsigned char v6 = get_color( p6, gray_color_t() );
+    unsigned char v7 = get_color( p7, gray_color_t() );
+    unsigned char v8 = get_color( p8, gray_color_t() );
+
+	// all values should be 110b ( 6 );
+    BOOST_ASSERT(v1 == 6);
+    BOOST_ASSERT(v2 == 6);
+    BOOST_ASSERT(v3 == 6);
+    BOOST_ASSERT(v4 == 6);
+    BOOST_ASSERT(v5 == 6);
+    BOOST_ASSERT(v6 == 6);
+    BOOST_ASSERT(v7 == 6);
+    BOOST_ASSERT(v8 == 6);
+}
+
+// TODO: Make better tests. Use some code from below.
+
+/*
+template <typename Pixel>
+void invert_pixel1(Pixel& pix) {
+    at_c<0>(pix)=0;
+}
+
+template <typename T> inline void ignore_unused_variable_warning(const T&){}
+
+void test_pixel_iterator() {
+    rgb8_pixel_t rgb8(1,2,3);
+    rgba8_pixel_t rgba8;
+
+    rgb8_ptr_t ptr1=&rgb8;
+    memunit_advance(ptr1, 3);
+    const rgb8_ptr_t ptr2=memunit_advanced(ptr1,10);
+
+    memunit_distance(ptr1,ptr2);
+    const rgb8_pixel_t& ref=memunit_advanced_ref(ptr1,10); ignore_unused_variable_warning(ref);
+
+    rgb8_planar_ptr_t planarPtr1(&rgb8);
+    rgb8_planar_ptr_t planarPtr2(&rgb8);
+    memunit_advance(planarPtr1,10);
+    memunit_distance(planarPtr1,planarPtr2);
+    rgb8_planar_ptr_t planarPtr3=memunit_advanced(planarPtr1,10);
+
+//    planarPtr2=&rgba8;
+
+    planar_pixel_reference<uint8_t&,rgb_t> pxl=*(planarPtr1+5);
+  rgb8_pixel_t pv2=pxl;
+  rgb8_pixel_t pv3=*(planarPtr1+5);
+     rgb8_pixel_t pv=planarPtr1[5];
+
+    assert(*(planarPtr1+5)==planarPtr1[5]);
+
+    rgb8_planar_ref_t planarRef=memunit_advanced_ref(planarPtr1,10);
+
+    rgb8_step_ptr_t stepIt(&rgb8,5);
+    stepIt++;
+    rgb8_step_ptr_t stepIt2=stepIt+10;
+    stepIt2=stepIt;
+
+    rgb8_step_ptr_t stepIt3(&rgb8,5);
+
+    rgb8_pixel_t& ref1=stepIt3[5];
+//  bool v=std::is_pod<iterator_traits<memory_based_step_iterator<rgb8_ptr_t> >::value_type>::value;
+//  v=std::is_pod<rgb8_pixel_t>::value;
+//  v=std::is_pod<int>::value;
+
+    rgb8_step_ptr_t rgb8StepIt(ptr1, 10);
+    rgb8_step_ptr_t rgb8StepIt2=rgb8StepIt;
+    rgb8StepIt=rgb8StepIt2;
+    ++rgb8StepIt;
+    rgb8_ref_t reff=*rgb8StepIt; ignore_unused_variable_warning(reff);
+    rgb8StepIt+=10;
+    std::ptrdiff_t dst=rgb8StepIt2-rgb8StepIt; ignore_unused_variable_warning(dst);
+
+    rgb8_pixel_t val1=ref1;
+    rgb8_ptr_t ptr=&ref1;
+
+    invert_pixel1(*planarPtr1);
+//    invert_pixel1(*ptr);
+    rgb8c_planar_ptr_t r8cpp;
+//    invert_pixel1(*r8cpp);
+
+    rgb8_pixel_t& val21=stepIt3[5];
+    rgb8_pixel_t val22=val21;
+
+    rgb8_pixel_t val2=stepIt3[5];
+    rgb8_ptr_t ptr11=&(stepIt3[5]); ignore_unused_variable_warning(ptr11);
+    rgb8_ptr_t ptr3=&*(stepIt3+5); ignore_unused_variable_warning(ptr3);
+
+    rgb8_step_ptr_t stepIt4(ptr,5);
+    ++stepIt4;
+
+    rgb8_step_ptr_t stepIt5;
+    if (stepIt4==stepIt5) {
+        int st=0;ignore_unused_variable_warning(st);
+    }
+
+    iterator_from_2d<rgb8_loc_t> pix_img_it(rgb8_loc_t(ptr, 20), 5);
+    ++pix_img_it;
+    pix_img_it+=10;
+    rgb8_pixel_t& refr=*pix_img_it;
+    refr=rgb8_pixel_t(1,2,3);
+    *pix_img_it=rgb8_pixel_t(1,2,3);
+    pix_img_it[3]=rgb8_pixel_t(1,2,3);
+    *(pix_img_it+3)=rgb8_pixel_t(1,2,3);
+
+    iterator_from_2d<rgb8c_loc_t> pix_img_it_c(rgb8c_loc_t(rgb8c_ptr_t(ptr),20), 5);
+    ++pix_img_it_c;
+    pix_img_it_c+=10;
+    //  *pix_img_it_c=rgb8_pixel_t(1,2,3);        // error: assigning though const iterator
+    using dif_t = iterator_from_2d<rgb8_loc_t>::difference_type;
+    dif_t dt=0;
+    std::ptrdiff_t tdt=dt; ignore_unused_variable_warning(tdt);
+
+    //  memory_based_step_iterator<rgb8_pixel_t> stepIt3Err=stepIt+10;       // error: non-const from const iterator
+
+    memory_based_2d_locator<rgb8_step_ptr_t> xy_locator(ptr,27);
+
+    xy_locator.x()++;
+//  memory_based_step_iterator<rgb8_pixel_t>& yit=xy_locator.y();
+    xy_locator.y()++;
+    xy_locator+=point<std::ptrdiff_t>(3,4);
+    // *xy_locator=(xy_locator(-1,0)+xy_locator(0,1))/2;
+    rgb8_pixel_t& rf=*xy_locator; ignore_unused_variable_warning(rf);
+
+    make_step_iterator(rgb8_ptr_t(),3);
+    make_step_iterator(rgb8_planar_ptr_t(),3);
+    make_step_iterator(rgb8_planar_step_ptr_t(),3);
+
+    // Test operator-> on planar ptrs
+    {
+    rgb8c_planar_ptr_t cp(&rgb8);
+    rgb8_planar_ptr_t p(&rgb8);
+//    get_color(p,red_t()) = get_color(cp,green_t());           // does not compile - cannot assign a non-const pointer to a const pointer. Otherwise you will be able to modify the value through it.
+    }
+//  xy_locator.y()++;
+
+    // dimensions to explore
+    //
+    // values, references, pointers
+    // color spaces (rgb,cmyk,gray)
+    // channel ordering (bgr vs rgb)
+    // planar vs interleaved
+
+// Pixel POINTERS
+//  using RGB8ConstPtr = iterator_traits<rgb8_ptr_t>::pointer const;
+    using RGB8ConstPtr = rgb8_ptr_t const;
+    using RGB8ConstPlanarPtr = rgb8_planar_ptr_t const;
+//  using RGB8ConstPlanarPtr = iterator_traits<rgb8_planar_ptr_t>::pointer const;
+
+// constructing from values, references and other pointers
+    RGB8ConstPtr rgb8_const_ptr=NULL; ignore_unused_variable_warning(rgb8_const_ptr);
+    rgb8_ptr_t rgb8ptr=&rgb8;
+
+    rgb8=bgr8_pixel_t(30,20,10);
+    rgb8_planar_ptr_t rgb8_pptr=&rgb8;
+    ++rgb8_pptr;
+    rgb8_pptr--;
+    rgb8_pptr[0]=rgb8;
+    RGB8ConstPlanarPtr rgb8_const_planar_ptr=&rgb8;
+
+    rgb8c_planar_ptr_t r8c=&rgb8;
+    r8c=&rgb8;
+
+    rgb8_pptr=&rgb8;
+
+    //  rgb8_const_planar_ptr=&rgb16p;                  // error: incompatible bit depth
+
+    //  iterator_traits<CMYK8>::pointer cmyk8_ptr_t=&rgb8;    // error: incompatible pointer type
+
+    RGB8ConstPtr rgb8_const_ptr_err=rgb8ptr;        // const pointer from non-regular pointer
+ignore_unused_variable_warning(rgb8_const_ptr_err);
+// dereferencing pointers to obtain references
+    rgb8_ref_t rgb8ref_2=*rgb8ptr; ignore_unused_variable_warning(rgb8ref_2);
+    assert(rgb8ref_2==rgb8);
+    //  RGB8Ref rgb8ref_2_err=*rgb8_const_planar_ptr;   // error: non-const reference from const pointer
+
+    rgb8_planar_ref_t rgb8planarref_3=*rgb8_pptr; // planar reference from planar pointer
+    assert(rgb8planarref_3==rgb8);
+    //  RGB8Ref rgb8ref_3=*rgb8_planar_ptr_t; // error: non-planar reference from planar pointer
+
+    const rgb8_pixel_t crgb8=rgb8;
+    *rgb8_pptr=rgb8;
+    *rgb8_pptr=crgb8;
+
+    memunit_advance(rgb8_pptr,3);
+    memunit_advance(rgb8_pptr,-3);
+}
+*/
+
+int main()
+{
+    try
+    {
+        test_pixel_iterator();
+
+        return EXIT_SUCCESS;
+    }
+    catch (std::exception const& e)
+    {
+        std::cerr << e.what() << std::endl;
+        return EXIT_FAILURE;
+    }
+    catch (...)
+    {
+        return EXIT_FAILURE;
+    }
+}
diff --git a/src/boost/libs/gil/test/legacy/recreate_image.cpp b/src/boost/libs/gil/test/legacy/recreate_image.cpp
new file mode 100644
index 000000000..7ca616cdb
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/recreate_image.cpp
@@ -0,0 +1,108 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifdef _MSC_VER
+//#pragma warning(disable : 4244)     // conversion from 'gil::image<V,Alloc>::coord_t' to 'int', possible loss of data (visual studio compiler doesn't realize that the two types are the same)
+#pragma warning(disable : 4503)     // decorated name length exceeded, name was truncated
+#endif
+
+#include <boost/gil/extension/dynamic_image/dynamic_image_all.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <ios>
+#include <iostream>
+#include <fstream>
+#include <map>
+#include <string>
+#include <type_traits>
+#include <vector>
+
+using namespace boost::gil;
+using namespace std;
+using namespace boost;
+
+///////////////////////////////////////////////////////////////
+
+std::size_t is_planar_impl( const std::size_t size_in_units
+                            , const std::size_t channels_in_image
+                            , std::true_type
+                            )
+{
+    return size_in_units * channels_in_image;
+}
+
+std::size_t is_planar_impl( const std::size_t size_in_units
+                          , const std::size_t
+                          , std::false_type
+                          )
+{
+    return size_in_units;
+}
+
+template< typename View >
+std::size_t get_row_size_in_memunits( typename View::x_coord_t width)
+{   // number of units per row
+    std::size_t size_in_memunits = width * memunit_step( typename View::x_iterator() );
+
+    return size_in_memunits;
+}
+
+
+template< typename View
+        , bool IsPlanar
+        >
+std::size_t total_allocated_size_in_bytes( const typename View::point_t& dimensions )
+{
+
+    using x_iterator = typename View::x_iterator;
+
+    // when value_type is a non-pixel, like int or float, num_channels< ... > doesn't work.
+    const std::size_t _channels_in_image = mp11::mp_eval_if< is_pixel< typename View::value_type >
+                                                        , num_channels< View >
+                                                        , std::integral_constant<int, 1>
+                                                        >::type::value;
+
+    std::size_t size_in_units = is_planar_impl( get_row_size_in_memunits< View >( dimensions.x ) * dimensions.y
+                                                , _channels_in_image
+                                                , typename std::conditional< IsPlanar, std::true_type, std::false_type >::type()
+                                                );
+
+    // return the size rounded up to the nearest byte
+    std::size_t btm = byte_to_memunit< typename View::x_iterator >::value;
+
+
+    return ( size_in_units + btm - 1 )
+           / btm;
+}
+
+
+void test_recreate_image()
+{
+    auto tasib_1 = total_allocated_size_in_bytes<rgb8_view_t, false>({640, 480});
+    auto tasib_2 = total_allocated_size_in_bytes<rgb8_view_t, false>({320, 200});
+
+    rgb8_image_t img( 640, 480 );
+    img.recreate( 320, 200 );
+}
+
+int main()
+{
+    test_recreate_image();
+
+    return ::boost::report_errors();
+}
+
+
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
+#pragma warning(push)
+#pragma warning(disable:4127) //conditional expression is constant
+#endif
+
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
+#pragma warning(pop)
+#endif
diff --git a/src/boost/libs/gil/test/legacy/sample_image.cpp b/src/boost/libs/gil/test/legacy/sample_image.cpp
new file mode 100644
index 000000000..bbcdf0179
--- /dev/null
+++ b/src/boost/libs/gil/test/legacy/sample_image.cpp
@@ -0,0 +1,159 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+unsigned char halfdome[][3174]={
+{
+    47,47,48,48,48,48,48,47,51,50,49,51,50,60,110,150,143,93,164,168,125,137,53,54,56,54,52,50,52,51,50,51,53,52,51,51,52,53,51,51,52,52,51,51,50,52,51,53,51,52,51,53,52,54,57,57,59,57,59,59,60,60,177,185,206,221,230,224,227,
+    50,52,48,51,50,51,52,51,53,51,53,53,56,54,59,59,61,64,149,149,153,65,58,57,57,57,55,55,56,57,55,57,56,56,53,54,56,55,53,55,54,56,56,55,54,54,56,54,55,57,56,54,57,57,59,70,178,75,67,191,132,194,226,201,226,226,227,237,222,
+    54,54,55,54,53,54,55,54,56,58,57,59,59,59,59,61,61,61,62,64,65,65,85,61,58,59,60,61,60,61,58,60,58,60,59,60,59,58,60,60,57,59,59,58,60,61,59,57,58,60,60,62,61,63,192,210,223,223,231,222,226,218,208,204,205,206,205,215,207,
+    58,57,57,59,58,58,60,58,60,60,59,58,62,63,64,64,62,63,66,66,67,67,65,66,64,62,64,61,62,63,65,64,63,63,64,60,63,63,62,64,62,64,63,65,63,64,63,62,61,64,63,84,119,69,146,179,202,221,217,208,205,209,206,212,201,182,178,184,183,
+    60,61,62,60,61,64,64,62,65,63,65,66,69,65,66,67,69,67,69,69,67,70,71,70,69,69,68,68,67,70,70,69,69,68,69,67,66,68,67,75,70,67,89,65,67,67,67,66,66,67,68,78,93,159,188,178,161,185,196,215,196,187,174,172,170,174,175,171,171,
+    66,66,65,66,68,69,67,68,67,70,68,70,72,72,73,73,73,73,74,75,75,75,76,74,75,75,74,75,76,75,75,74,75,75,74,75,76,90,157,157,158,177,163,182,161,72,76,70,71,71,72,74,75,80,117,129,143,166,200,194,191,210,215,200,182,181,176,182,196,
+    72,72,71,72,72,71,74,72,74,73,73,77,77,78,77,79,77,80,78,79,82,80,81,92,81,91,80,80,81,81,81,79,81,79,116,123,103,96,87,80,105,115,140,82,97,97,130,169,162,124,77,78,80,79,81,83,83,142,192,202,211,182,203,191,194,176,169,184,184,
+    75,76,75,73,77,77,79,76,79,77,79,80,81,84,84,83,85,86,87,166,241,96,89,88,89,88,100,88,88,87,92,203,91,173,178,162,179,87,86,85,83,84,84,82,83,82,85,83,85,94,81,83,81,83,84,135,183,187,192,176,180,208,193,216,203,196,196,207,191,
+    79,80,79,81,81,82,82,86,83,84,85,88,89,95,244,238,93,128,222,227,245,248,231,99,159,98,183,196,95,97,183,215,215,223,230,230,228,117,92,90,90,90,88,87,87,86,87,87,88,86,89,89,90,91,101,231,214,189,221,165,166,192,184,193,194,176,170,159,157,
+    84,84,86,86,86,88,88,88,90,90,91,94,217,244,246,248,249,188,223,223,224,231,232,222,226,218,189,171,190,199,223,179,199,204,205,202,203,205,188,101,97,93,94,93,93,95,96,106,115,97,96,98,209,234,217,224,242,242,242,217,214,191,139,183,179,179,164,154,143,
+    89,89,89,92,91,91,93,95,94,96,115,226,208,212,235,241,245,212,196,200,201,209,203,192,183,187,219,192,198,211,214,224,200,197,184,181,186,203,190,218,189,131,173,189,160,188,173,175,185,197,199,201,192,237,211,196,225,241,242,230,238,222,222,221,218,188,168,184,197,
+    95,98,98,98,99,101,102,161,161,143,215,193,232,200,200,204,227,208,228,214,212,226,48,195,213,193,191,203,201,206,229,232,210,183,225,221,234,232,234,197,206,189,204,200,193,201,191,200,206,215,223,202,196,186,189,181,209,211,215,183,236,232,176,209,217,231,181,177,178,
+    103,101,105,106,153,171,197,209,204,218,184,169,199,197,210,213,202,209,215,222,234,203,120,41,195,197,187,197,186,208,193,198,198,196,197,200,201,198,202,210,222,190,178,198,211,232,226,220,204,189,190,199,188,194,193,170,169,187,190,209,225,219,208,225,212,207,199,191,203,
+    109,109,111,150,205,175,184,193,175,161,165,121,134,130,126,160,203,190,184,161,147,204,61,89,193,201,198,185,215,192,183,193,189,209,189,174,172,172,170,178,197,188,186,214,227,229,143,163,160,182,193,207,189,209,190,191,176,184,197,171,180,181,207,218,218,212,176,170,170,
+    118,182,143,213,169,184,183,192,201,179,193,212,203,182,154,196,205,163,201,193,191,117,59,45,179,193,228,204,203,186,202,189,159,162,166,180,195,195,191,218,205,177,201,200,199,204,228,183,202,209,202,203,199,212,217,189,207,183,186,192,188,188,175,177,183,179,186,179,184,
+    126,155,183,185,189,188,185,197,175,183,192,192,188,151,172,86,190,196,184,178,128,111,57,56,135,192,188,198,195,150,180,202,214,224,211,205,182,197,199,195,211,196,181,194,206,194,194,194,192,211,197,198,201,191,197,194,197,192,189,186,181,177,169,190,171,163,171,175,160,
+    133,134,136,136,163,146,116,166,186,181,205,201,93,132,137,198,207,190,69,119,127,110,70,66,153,192,180,164,168,179,188,199,189,177,183,188,189,160,177,190,194,193,192,194,124,175,193,186,178,180,207,209,187,178,144,97,131,159,105,200,114,125,135,141,179,199,172,108,117,
+    120,151,138,128,163,112,124,96,103,139,102,149,213,197,208,214,193,80,104,154,107,125,84,63,141,161,163,175,183,186,190,183,201,79,86,204,191,207,194,207,184,169,141,146,171,181,128,125,83,91,101,114,127,163,120,119,114,122,126,140,87,115,113,125,186,104,83,68,84,
+    118,133,167,92,126,109,124,173,137,181,150,147,166,203,176,178,82,81,123,109,137,146,60,56,146,193,156,175,180,175,194,203,185,178,82,84,74,113,105,65,64,127,65,70,140,92,83,82,80,80,82,79,84,74,99,138,84,76,109,77,142,123,76,83,71,74,55,54,34,
+    182,127,117,134,158,163,201,189,166,149,192,147,191,164,175,165,120,174,99,109,167,130,153,62,180,131,96,193,203,204,191,215,183,141,70,70,66,68,73,73,71,61,74,85,95,66,63,133,154,135,89,113,89,102,69,124,68,85,77,56,51,72,94,34,60,37,90,39,34,
+    149,167,135,154,108,173,152,148,184,153,157,182,167,194,176,161,202,148,120,132,149,174,156,125,147,74,133,220,225,187,116,218,209,216,70,69,72,68,61,59,60,63,70,73,63,64,81,59,84,99,80,95,70,90,52,76,162,144,87,67,65,68,98,116,90,55,140,156,58,
+    91,120,142,143,157,191,188,196,151,209,199,189,177,188,81,77,44,102,112,126,155,70,200,127,88,107,87,59,95,101,153,145,203,188,62,129,124,63,66,58,60,62,67,58,60,68,62,63,77,64,63,64,71,130,97,92,105,72,67,71,158,166,144,152,160,127,125,140,115,
+    133,164,135,143,168,172,196,181,211,206,197,165,144,56,91,59,46,57,65,157,146,89,177,128,59,53,76,59,63,58,132,122,126,183,209,68,59,74,69,74,77,76,78,49,57,57,72,64,67,81,100,69,146,137,153,69,140,166,83,173,175,169,171,166,41,149,154,120,172,
+    101,131,158,153,167,86,82,193,163,204,140,129,105,111,44,46,32,157,150,190,120,52,120,163,144,71,68,84,81,87,160,160,106,123,121,97,69,75,79,70,60,57,73,60,61,61,94,77,73,131,115,126,121,96,130,169,128,128,145,180,159,64,139,106,147,45,27,33,20,
+    67,80,168,201,199,68,148,210,111,132,85,63,139,88,101,60,92,96,66,104,76,47,103,165,115,82,49,89,113,88,127,168,178,133,81,90,84,60,63,105,64,80,64,67,54,62,70,89,88,57,86,129,159,154,202,146,143,126,60,57,69,66,144,32,28,33,62,27,35,
+    98,101,82,151,129,73,80,129,134,102,116,66,81,53,87,110,95,87,144,69,123,118,106,95,88,69,69,108,91,151,158,132,137,71,158,179,184,145,65,72,64,91,72,73,76,65,60,52,57,63,119,73,67,128,114,80,123,134,172,158,108,114,28,27,28,22,33,27,52,
+    158,127,109,79,90,75,74,169,97,94,124,61,121,160,171,150,102,60,47,115,136,121,155,81,142,141,135,114,114,144,78,118,79,76,67,123,90,125,77,148,103,77,68,96,73,68,50,62,60,98,101,113,117,117,122,143,97,51,64,60,51,28,37,44,35,30,40,52,74,
+    139,174,90,111,108,143,123,135,128,113,129,123,139,132,96,55,47,57,69,95,102,76,124,76,52,59,148,131,119,68,86,152,100,105,128,89,139,116,118,131,125,151,93,66,66,61,61,61,58,65,81,68,87,88,102,96,90,111,72,71,79,29,42,37,46,44,49,61,96,
+    128,159,122,75,55,64,168,129,93,116,109,122,140,149,161,48,58,55,93,96,87,122,76,74,57,66,144,143,57,61,87,130,96,115,131,54,105,117,87,89,79,168,139,156,108,106,80,60,60,87,69,101,85,72,66,90,84,91,91,101,127,41,37,65,65,48,30,70,128,
+    153,175,59,54,52,155,159,113,143,118,113,127,149,121,148,81,162,97,120,140,57,51,57,58,80,56,124,164,81,58,100,140,60,112,118,98,106,93,65,89,65,129,61,144,119,182,171,78,148,70,101,91,85,90,78,106,89,109,118,131,117,54,75,100,86,47,78,181,134,
+    60,50,51,52,48,148,87,156,170,141,146,159,77,51,144,174,102,112,161,49,58,73,46,63,64,63,60,135,129,122,87,121,122,174,105,79,96,55,56,60,108,39,46,67,51,144,123,136,59,91,80,99,84,62,92,101,103,99,128,136,215,127,110,139,121,74,135,181,175,
+    55,51,55,54,105,173,137,149,186,92,84,79,91,92,96,190,101,164,72,50,75,51,67,56,72,93,118,53,63,57,82,159,182,150,127,53,57,69,59,58,54,62,78,71,96,132,90,72,55,63,83,119,86,131,65,66,114,140,95,130,160,135,158,124,133,94,135,147,140,
+    56,64,47,127,175,145,131,132,178,110,84,71,127,64,136,118,93,86,139,66,116,79,55,64,50,80,133,72,95,161,164,163,163,106,68,52,58,40,60,42,42,84,86,110,88,129,73,72,43,49,49,84,116,93,78,76,132,110,147,126,122,132,82,139,138,79,62,175,158,
+    50,53,56,59,170,124,166,103,147,89,116,125,101,126,122,156,100,151,165,128,146,54,73,143,66,128,147,149,145,139,144,162,161,109,94,55,46,85,54,57,69,47,63,59,127,65,85,44,99,71,55,70,37,87,119,109,70,122,161,145,148,179,129,119,77,129,134,160,141,
+    99,53,76,140,161,77,119,137,163,68,89,92,58,138,122,153,129,88,137,134,134,99,95,116,130,117,155,120,136,108,165,158,207,58,87,77,43,55,51,119,59,43,71,63,83,61,86,45,34,72,112,59,162,56,39,66,124,132,139,201,164,172,69,75,92,89,139,150,50,
+    48,49,56,85,83,51,103,106,118,87,104,190,118,110,143,154,74,144,119,103,117,109,155,141,102,104,96,134,111,89,155,154,121,66,43,42,31,41,54,53,70,52,62,47,97,102,71,57,48,42,60,77,84,72,49,62,56,121,67,173,55,203,53,95,56,54,57,103,57,
+    48,55,119,169,97,101,106,123,84,55,144,135,116,143,84,114,116,148,102,128,104,114,109,65,93,104,106,164,128,128,145,185,115,51,135,165,75,70,112,152,108,92,57,55,60,59,54,57,120,86,69,136,110,132,62,73,78,88,72,94,57,92,168,55,107,53,43,50,28,
+    51,51,66,75,71,56,127,117,50,100,145,138,100,128,73,158,105,112,112,170,102,66,92,107,144,140,142,146,147,167,140,116,135,126,175,126,75,118,95,115,62,117,105,70,80,46,75,105,121,127,112,56,89,101,109,52,102,53,51,81,55,157,144,130,47,42,63,82,47,
+    76,57,122,66,98,54,48,82,65,133,111,135,108,92,146,48,147,123,146,103,102,94,140,100,90,112,100,146,148,151,171,117,160,114,135,128,95,121,129,105,83,128,135,82,118,91,81,60,102,121,107,97,89,117,93,51,52,35,72,48,59,55,57,41,38,56,60,7,24,
+    97,144,102,119,53,129,63,74,104,145,134,70,109,108,131,103,86,106,108,67,115,92,127,109,66,81,160,128,165,177,120,123,157,78,114,95,149,161,102,135,94,115,129,127,108,66,64,100,84,156,127,67,89,128,88,123,38,35,42,41,50,58,47,57,134,130,111,68,68,
+    115,121,134,46,126,62,107,158,98,79,113,72,82,147,149,109,117,120,103,109,127,109,130,119,92,103,175,143,124,140,110,111,57,110,124,103,128,142,122,83,109,94,152,92,105,101,46,86,88,131,160,88,108,89,88,156,128,66,59,56,69,83,71,100,76,106,116,43,28,
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+    126,86,127,113,141,148,92,74,81,58,60,62,118,118,49,68,152,116,125,170,119,115,148,125,119,53,87,156,78,145,71,134,52,105,101,80,50,54,93,49,124,107,107,101,55,64,72,113,64,105,133,143,93,137,157,118,70,29,61,76,60,78,105,59,48,53,42,123,70,
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+    161,160,160,161,160,159,160,160,160,161,161,162,163,162,162,162,162,161,163,162,163,163,162,162,162,162,162,163,163,160,161,162,161,161,161,160,160,160,159,161,158,160,163,159,159,158,159,158,158,159,159,162,167,184,198,194,187,201,208,221,207,201,191,190,188,192,192,190,190,
+    165,165,164,164,165,165,164,165,166,165,166,165,165,166,166,164,166,166,167,167,166,167,167,167,166,167,167,167,167,166,167,167,166,166,166,166,164,166,176,177,177,192,183,195,180,163,162,162,162,163,163,163,164,166,175,175,179,187,211,207,203,219,221,209,197,197,194,198,208,
+    169,169,168,168,167,167,169,169,168,168,167,169,170,171,170,170,170,171,170,169,171,172,171,171,170,173,171,171,171,171,170,171,170,169,175,169,170,171,170,168,172,170,174,168,169,167,177,184,180,171,166,166,167,168,169,170,171,182,205,210,217,197,215,203,204,194,187,201,200,
+    172,173,172,173,172,173,172,172,172,173,173,172,173,174,174,174,174,174,176,192,242,178,177,176,176,176,176,176,176,175,176,212,175,190,193,188,193,174,172,172,171,171,171,171,171,171,170,171,172,172,171,171,171,172,173,182,200,202,204,193,196,215,205,224,214,207,207,215,205,
+    177,176,175,176,176,176,175,175,177,176,177,177,178,180,245,241,180,184,227,232,243,246,235,183,190,181,202,213,181,181,200,219,217,223,233,233,228,180,178,176,176,176,176,176,175,174,175,175,176,175,175,176,177,179,178,234,222,202,223,197,196,203,198,204,206,193,189,181,180,
+    179,180,178,180,179,178,179,179,179,180,180,183,228,245,247,248,247,201,227,227,225,231,234,223,228,221,201,186,199,208,224,194,204,208,208,207,209,209,200,181,181,180,180,180,178,180,177,179,180,179,179,179,220,233,221,228,238,238,238,222,220,205,190,197,195,194,182,173,167,
+    182,183,182,182,183,184,184,184,185,185,186,231,215,218,240,242,245,219,204,205,206,211,206,201,193,195,220,200,203,213,217,224,205,204,193,191,195,205,197,218,197,184,190,200,191,202,191,193,199,206,207,208,208,233,216,206,228,237,238,229,233,223,224,223,220,199,185,195,204,
+    187,187,187,187,188,189,189,198,196,188,220,204,234,208,207,210,229,213,227,216,216,225,76,179,203,188,186,189,190,207,225,227,213,193,223,219,229,228,230,201,208,195,206,201,196,203,198,203,209,218,220,205,200,195,197,191,213,214,215,194,234,230,189,211,221,228,194,190,191,
+    190,191,189,189,188,195,207,213,210,220,199,191,205,204,213,213,208,212,216,221,226,207,127,71,190,192,177,176,169,189,198,201,200,200,202,206,205,203,206,212,219,198,197,200,209,224,221,216,204,199,196,202,194,199,199,183,184,195,196,211,221,218,211,221,212,208,203,198,210,
+    194,193,192,192,211,194,198,203,194,191,191,194,190,190,193,183,208,201,194,173,146,207,79,100,187,189,182,173,200,185,194,199,197,210,196,186,182,184,180,185,200,194,194,212,221,223,195,195,195,196,199,207,197,208,197,199,188,192,201,184,189,189,208,214,214,212,186,185,187,
+    195,203,195,217,193,199,199,204,207,199,204,213,208,200,187,203,209,180,195,184,188,121,77,73,179,179,202,189,186,175,175,193,176,178,181,187,199,199,196,215,205,197,205,204,202,207,221,203,207,210,204,205,202,209,214,195,205,193,195,196,196,194,188,189,192,189,194,189,193,
+    199,193,198,200,201,199,198,203,194,199,202,202,199,195,198,117,187,194,184,169,132,121,79,79,136,184,172,189,177,144,169,178,210,216,208,205,193,200,202,200,208,199,192,199,204,199,197,199,198,208,200,200,203,198,201,198,200,198,195,193,191,192,186,196,187,183,184,186,179,
+    200,198,198,198,165,190,137,190,198,191,207,206,105,143,133,180,184,195,104,118,129,114,85,87,154,185,164,158,161,172,171,177,195,192,191,194,195,183,190,199,200,201,199,198,154,192,198,196,192,192,203,205,197,191,174,139,154,174,150,202,149,155,157,153,174,197,186,149,148,
+    140,157,143,139,163,134,132,117,123,150,112,151,196,181,204,207,202,112,106,149,111,128,94,88,138,161,161,171,174,180,171,166,155,100,101,201,195,204,184,192,179,171,147,148,170,175,140,133,111,114,120,134,153,161,139,148,146,148,147,152,123,131,131,147,173,122,115,111,121,
+    140,153,170,120,136,128,130,168,146,170,148,155,171,209,178,182,120,110,117,111,136,148,75,75,145,182,144,162,169,155,167,182,168,172,97,101,95,115,113,92,90,128,91,95,141,114,108,107,108,107,105,107,108,107,123,143,128,123,139,119,148,134,107,108,104,106,103,101,71,
+    174,145,131,150,166,160,193,185,160,145,190,146,188,169,175,170,134,158,100,114,168,133,142,80,170,122,101,177,190,173,172,196,161,129,82,81,79,80,82,84,88,85,92,93,99,77,77,128,150,129,100,120,106,113,101,128,104,109,102,86,84,101,114,73,91,75,109,74,68,
+    154,164,144,156,125,166,159,149,179,157,150,166,169,191,182,165,190,145,118,132,149,162,143,103,125,67,130,195,203,167,104,203,190,196,74,75,75,76,73,72,74,75,79,80,75,76,91,72,84,98,82,96,76,98,98,112,161,151,115,102,103,103,121,124,91,73,134,144,72,
+    112,140,152,153,159,181,183,188,154,202,185,188,179,182,87,74,55,103,111,130,157,78,178,116,80,98,82,55,85,93,131,138,189,162,69,119,111,69,70,67,69,70,73,69,70,74,71,72,83,70,72,70,76,114,92,90,104,96,103,106,162,167,150,154,160,127,120,134,119,
+    140,161,148,152,167,164,190,177,203,201,191,167,156,62,95,65,53,57,63,148,151,96,163,116,53,55,72,56,60,51,120,115,116,171,180,66,65,74,70,73,81,77,79,61,64,67,78,73,73,82,101,70,132,125,140,73,132,154,115,168,173,166,173,166,66,143,152,125,169,
+    115,127,155,158,167,95,96,188,164,204,150,137,112,114,54,56,47,141,136,179,130,77,118,151,137,61,64,72,63,75,136,140,99,118,109,88,64,72,75,65,65,62,73,64,68,69,94,75,76,126,112,122,121,103,129,154,119,125,149,176,150,83,136,113,151,56,46,56,40,
+    82,96,169,195,188,85,139,201,113,129,92,77,138,87,101,69,85,89,61,92,75,72,101,156,89,64,50,75,91,76,112,151,147,115,68,73,72,61,63,102,63,76,68,63,61,66,70,84,83,65,91,127,153,145,181,123,133,121,63,70,84,76,145,57,54,55,83,47,54,
+    111,114,103,149,135,84,92,136,136,107,110,68,79,69,93,101,101,91,134,69,119,115,100,91,77,56,54,101,81,147,142,116,119,61,136,154,159,130,55,67,63,84,70,68,74,67,63,60,62,63,117,79,69,127,114,82,120,127,168,153,111,114,54,50,55,45,61,47,67,
+    158,133,115,90,103,88,91,163,106,98,125,64,120,151,167,150,103,62,53,108,135,125,149,74,125,124,119,99,111,132,67,112,67,63,60,110,79,117,68,132,88,62,56,86,72,65,56,62,61,99,102,109,111,105,114,131,87,57,69,67,57,54,60,73,63,56,61,67,78,
+    144,169,98,125,113,141,124,142,135,114,131,126,143,126,96,61,56,60,74,82,109,79,113,66,49,53,129,125,112,54,81,142,90,91,121,84,124,110,107,113,113,135,70,52,58,58,59,60,59,61,72,67,88,88,95,90,78,103,75,71,88,57,68,62,69,69,69,79,102,
+    136,159,131,99,77,82,167,121,94,114,114,124,142,150,159,61,59,59,94,102,93,121,60,52,46,46,131,138,53,52,62,124,97,105,126,54,102,105,79,78,73,154,124,134,95,91,65,54,56,85,64,96,74,67,49,80,85,91,89,103,124,65,62,85,84,72,52,81,127,
+    153,173,75,73,72,154,164,120,146,121,113,128,144,133,128,77,152,91,122,135,52,44,43,45,64,51,114,158,73,48,96,130,58,106,117,92,103,84,53,78,53,112,52,132,103,161,152,58,130,67,94,91,82,83,72,98,78,107,115,129,115,79,93,109,98,67,88,178,133,
+    80,70,71,74,71,140,96,152,170,145,153,158,80,55,130,160,97,97,158,46,51,59,44,48,48,49,53,122,120,107,72,108,118,163,105,74,89,46,41,45,101,40,38,48,47,125,109,127,47,81,74,100,84,62,94,95,100,94,123,137,202,132,118,139,128,76,138,177,165,
+    71,70,74,75,111,173,130,147,184,108,77,91,91,85,100,185,102,151,62,47,58,42,52,46,53,68,109,50,52,47,71,140,174,144,125,46,51,58,43,44,46,52,60,53,89,122,78,54,43,46,65,104,74,116,57,55,110,140,97,129,154,132,158,121,135,95,139,138,132,
+    71,79,70,133,168,145,124,137,165,110,87,70,128,64,128,106,85,83,110,61,104,66,45,53,45,65,122,62,93,152,155,153,152,105,62,42,49,39,50,38,46,82,86,106,74,115,62,59,38,40,41,61,101,76,63,68,129,104,144,120,118,124,77,141,139,91,67,172,156,
+    67,68,72,73,170,129,163,114,143,93,124,125,105,128,123,149,103,137,152,115,139,51,70,136,56,113,138,144,138,130,139,152,151,99,84,54,46,75,43,49,57,39,52,52,112,55,73,40,83,51,52,60,37,77,105,97,56,120,155,141,145,172,126,124,83,131,133,159,133,
+    109,70,82,147,155,80,123,145,168,76,96,99,66,140,129,152,132,85,126,130,136,100,90,111,121,114,148,113,127,106,160,152,198,53,79,67,35,43,40,109,51,36,59,48,84,55,85,38,36,59,104,44,139,48,38,54,114,116,138,194,160,166,57,66,98,88,140,149,47,
+    66,65,72,93,94,61,106,114,123,90,113,182,119,111,141,154,75,140,113,101,109,104,143,139,101,102,88,129,105,83,152,150,113,60,40,40,37,35,45,40,71,44,47,47,96,103,52,42,45,38,53,61,81,58,42,47,45,111,50,153,50,201,52,88,50,64,52,94,39,
+    65,70,128,162,101,103,108,135,93,60,138,137,117,145,92,116,115,134,102,123,95,97,92,61,85,99,95,158,121,114,139,178,106,46,118,150,63,66,84,139,96,84,49,43,48,49,41,44,87,72,51,106,93,111,54,65,68,74,62,80,46,94,157,56,110,50,43,40,18,
+    68,64,75,81,74,60,133,120,56,106,147,131,108,123,70,163,101,108,107,160,94,56,87,101,133,136,139,137,141,165,136,110,132,112,159,120,60,102,90,109,55,103,101,61,84,43,63,100,107,122,103,57,82,87,94,47,87,49,53,76,60,151,142,127,47,43,62,46,35,
+    87,62,127,69,101,60,58,87,67,140,108,131,112,90,150,56,140,110,138,95,98,84,121,92,88,105,95,140,136,148,168,114,149,107,125,121,90,110,122,103,76,109,123,67,100,75,65,46,100,106,89,91,88,113,92,49,46,49,66,44,50,46,47,39,42,48,31,6,14,
+    101,153,109,119,59,130,65,76,112,146,136,77,102,113,143,107,93,100,105,58,112,91,108,96,65,83,155,120,155,168,120,117,147,72,105,90,139,149,93,123,84,109,108,123,106,54,50,96,80,133,106,68,83,123,78,97,41,44,49,43,50,50,43,47,121,124,99,56,39,
+    123,133,137,56,119,72,105,163,107,86,109,74,91,147,153,114,118,121,98,112,126,99,125,118,94,97,167,115,118,135,110,106,52,102,115,92,122,134,110,82,87,81,148,78,108,96,40,78,75,106,143,80,107,86,83,131,125,71,65,48,59,77,67,92,76,99,107,27,26,
+    126,123,66,172,98,141,98,72,60,61,78,82,94,107,117,71,88,142,75,117,120,124,102,120,103,136,102,110,176,120,50,74,90,57,149,107,114,56,111,43,64,158,111,56,132,61,90,82,90,89,122,71,110,137,112,99,69,69,115,45,71,79,80,73,48,123,115,24,83,
+    138,98,128,121,148,153,102,81,77,62,61,65,121,121,51,64,146,116,120,156,114,110,137,117,119,51,66,146,79,137,66,118,48,97,94,66,44,48,88,44,106,103,91,96,45,54,56,98,50,105,128,138,82,131,150,117,73,43,70,80,66,67,100,47,46,48,23,111,45,
+    59,60,102,164,133,95,150,100,85,140,99,62,108,125,88,103,63,58,148,102,67,118,124,119,137,60,83,110,121,127,137,107,82,123,124,95,55,45,54,90,65,134,66,42,46,51,58,101,64,94,129,145,77,94,129,52,104,109,93,89,51,50,49,63,42,42,7,37,53,
+    59,59,76,71,96,113,89,71,170,66,103,123,71,86,117,49,50,108,121,93,100,97,117,106,126,97,121,158,122,132,143,72,132,117,99,57,88,58,75,98,114,134,116,94,38,42,42,64,71,77,95,109,141,132,40,72,52,71,63,49,93,79,53,100,42,61,7,16,32,
+    60,56,58,54,70,201,97,116,107,114,103,139,80,123,133,118,110,142,70,87,97,103,118,146,121,108,143,117,136,135,110,86,110,64,108,96,121,66,57,116,123,148,58,53,76,73,57,46,101,103,95,151,114,143,59,74,60,89,38,88,66,99,96,121,65,44,52,20,28,
+},
+};
+
+using namespace boost::gil;
+extern rgb8c_planar_view_t sample_view;
+rgb8c_planar_view_t sample_view = planar_rgb_view(69,46,halfdome[0],halfdome[1],halfdome[2],69);
diff --git a/src/boost/libs/gil/test/test_utility_output_stream.cpp b/src/boost/libs/gil/test/test_utility_output_stream.cpp
new file mode 100644
index 000000000..eb46e2cd5
--- /dev/null
+++ b/src/boost/libs/gil/test/test_utility_output_stream.cpp
@@ -0,0 +1,68 @@
+//
+// Copyright 2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_utility_output_stream.hpp"
+
+#include <cstdint>
+#include <sstream>
+#include <type_traits>
+
+namespace utility = boost::gil::test::utility;
+
+int main()
+{
+    static_assert(
+        std::is_same<utility::printable_numeric_t<std::uint8_t>, int>::value,
+        "std::uint8_t not printable as int");
+    static_assert(
+        !std::is_same<utility::printable_numeric_t<std::uint64_t>, int>::value,
+        "std::uint64_t printable as int");
+    static_assert(
+        std::is_same<utility::printable_numeric_t<float>, double>::value,
+        "float not printable as double");
+
+    {
+        std::ostringstream oss;
+        utility::print_color_base p{oss};
+        p(std::int8_t{-128});
+        BOOST_TEST_EQ(oss.str(), "v0=-128");
+    }
+    {
+        std::ostringstream oss;
+        utility::print_color_base p{oss};
+        p(std::uint8_t{128});
+        BOOST_TEST_EQ(oss.str(), "v0=128");
+    }
+    {
+        std::ostringstream oss;
+        utility::print_color_base p{oss};
+        p(std::int16_t{-32768});
+        BOOST_TEST_EQ(oss.str(), "v0=-32768");
+    }
+    {
+        std::ostringstream oss;
+        utility::print_color_base p{oss};
+        p(std::uint16_t{32768});
+        BOOST_TEST_EQ(oss.str(), "v0=32768");
+    }
+    {
+        std::ostringstream oss;
+        utility::print_color_base p{oss};
+        p(float{1.2345f});
+        BOOST_TEST_EQ(oss.str(), "v0=1.2345");
+    }
+    {
+        std::ostringstream oss;
+        utility::print_color_base p{oss};
+        p(double{1.2345});
+        BOOST_TEST_EQ(oss.str(), "v0=1.2345");
+    }
+
+    return ::boost::report_errors();
+}
diff --git a/src/boost/libs/gil/test/test_utility_output_stream.hpp b/src/boost/libs/gil/test/test_utility_output_stream.hpp
new file mode 100644
index 000000000..e2a8a01bb
--- /dev/null
+++ b/src/boost/libs/gil/test/test_utility_output_stream.hpp
@@ -0,0 +1,133 @@
+//
+// Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distribtted under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#ifndef BOOST_GIL_TEST_TEST_UTILITY_HPP
+#define BOOST_GIL_TEST_TEST_UTILITY_HPP
+
+#include <boost/gil/color_base_algorithm.hpp> // static_for_each
+#include <boost/gil/packed_pixel.hpp>
+#include <boost/gil/pixel.hpp>
+#include <boost/gil/planar_pixel_reference.hpp>
+#include <boost/gil/promote_integral.hpp>
+
+#include <boost/core/demangle.hpp>
+#include <boost/core/typeinfo.hpp>
+
+#include <cstdint>
+#include <ostream>
+#include <type_traits>
+
+// Utilities to make GIL primitives printable for BOOST_TEST_EQ and other macros
+
+namespace boost { namespace gil {
+
+namespace test { namespace utility {
+
+template <typename T>
+struct printable_numeric
+{
+    using type = typename std::conditional
+    <
+        std::is_integral<T>::value,
+        typename ::boost::gil::promote_integral<T>::type,
+        typename std::common_type<T, double>::type
+    >::type;
+
+    static_assert(std::is_arithmetic<T>::value, "T must be numeric type");
+    static_assert(sizeof(T) <= sizeof(type), "bit-size narrowing conversion");
+};
+
+template <typename T>
+using printable_numeric_t = typename printable_numeric<T>::type;
+
+struct print_color_base
+{
+    std::ostream& os_;
+    std::size_t element_index_{0};
+    print_color_base(std::ostream& os) : os_(os) {}
+
+    template <typename Element>
+    void operator()(Element const& c)
+    {
+        printable_numeric_t<Element> n{c};
+        if (element_index_ > 0) os_ << ", ";
+        os_ << "v" << element_index_ << "=" << n;
+        ++element_index_;
+    }
+
+    template <typename BitField, int FirstBit, int NumBits, bool IsMutable>
+    void operator()(gil::packed_channel_reference<BitField, FirstBit, NumBits, IsMutable> const& c)
+    {
+        printable_numeric_t<BitField> n{c.get()};
+        if (element_index_ > 0) os_ << ", ";
+        os_ << "v" << element_index_ << "=" << n;
+        ++element_index_;
+    }
+
+    template <typename BaseChannelValue, typename MinVal, typename MaxVal>
+    void operator()(gil::scoped_channel_value<BaseChannelValue, MinVal, MaxVal> const& c)
+    {
+        printable_numeric_t<BaseChannelValue> n{c};
+        if (element_index_ > 0) os_ << ", ";
+        os_ << "v" << element_index_ << "=" << n;
+        ++element_index_;
+    }
+};
+
+}} // namespace test::utility
+
+template <typename T>
+std::ostream& operator<<(std::ostream& os, point<T> const& p)
+{
+    os << "point<" << boost::core::demangled_name(typeid(T)) << ">";
+    os << "(" << p.x << ", " << p.y << ")" << std::endl;
+    return os;
+}
+
+template <typename ChannelValue, typename Layout>
+std::ostream& operator<<(std::ostream& os, pixel<ChannelValue, Layout> const& p)
+{
+    os << "pixel<"
+       << "\n\tChannel=" << boost::core::demangled_name(typeid(ChannelValue))
+       << ",\n\tLayout=" << boost::core::demangled_name(typeid(Layout))
+       << "\n>(";
+
+    static_for_each(p, test::utility::print_color_base{os});
+    os << ")" << std::endl;
+    return os;
+}
+
+template <typename BitField, typename ChannelRefs, typename Layout>
+std::ostream& operator<<(std::ostream& os, packed_pixel<BitField, ChannelRefs, Layout> const& p)
+{
+    os << "packed_pixel<"
+       << "\n\tBitField=" << boost::core::demangled_name(typeid(BitField))
+       << ",\n\tChannelRefs=" << boost::core::demangled_name(typeid(ChannelRefs))
+       << ",\n\tLayout=" << boost::core::demangled_name(typeid(Layout))
+       << ">(";
+
+    static_for_each(p, test::utility::print_color_base{os});
+    os << ")" << std::endl;
+    return os;
+}
+
+template <typename ChannelReference, typename ColorSpace>
+std::ostream& operator<<(std::ostream& os, planar_pixel_reference<ChannelReference, ColorSpace> const& p)
+{
+    os << "planar_pixel_reference<"
+       << "\nChannelReference=" << boost::core::demangled_name(typeid(ChannelReference))
+       << ",\nColorSpace=" << boost::core::demangled_name(typeid(ColorSpace))
+       << ">(";
+
+    static_for_each(p, test::utility::print_color_base{os});
+    os << ")" << std::endl;
+    return os;
+}
+
+}} // namespace boost::gil
+
+#endif
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