diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
commit | 5c1676dfe6d2f3c837a5e074117b45613fd29a72 (patch) | |
tree | cbffb45144febf451e54061db2b21395faf94bfe /app/core/gimpimage-convert-fsdither.h | |
parent | Initial commit. (diff) | |
download | gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.tar.xz gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.zip |
Adding upstream version 2.10.34.upstream/2.10.34upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'app/core/gimpimage-convert-fsdither.h')
-rw-r--r-- | app/core/gimpimage-convert-fsdither.h | 559 |
1 files changed, 559 insertions, 0 deletions
diff --git a/app/core/gimpimage-convert-fsdither.h b/app/core/gimpimage-convert-fsdither.h new file mode 100644 index 0000000..ebd9800 --- /dev/null +++ b/app/core/gimpimage-convert-fsdither.h @@ -0,0 +1,559 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#ifndef __GIMP_IMAGE_CONVERT_FSDITHER_H__ +#define __GIMP_IMAGE_CONVERT_FSDITHER_H__ + +/* The following 5 arrays are used in performing floyd-steinberg + * error diffusion dithering. The range array allows the quick + * bounds checking of pixel values. The 4 error arrays contain + * the error computations for the east, south-east, south and + * south-west pixels surrounding the current pixel respectively. + */ + + +static const guchar range_array[] = { + 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, 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, 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, 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, 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, + 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, 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, 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, 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, 0, 0, 0, 0, 0, 1, 2, 3, + 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, + 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, + 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, + 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, + 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, + 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, + 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, + 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, + 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, + 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, + 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, + 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, + 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, + 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, + 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, + 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, + 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, + 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, + 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, + 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, + 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, + 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, + 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, + 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, + 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, +}; + +static const gshort floyd_steinberg_error1[] = { + -223, -223, -222, -222, -221, -221, -220, -220, -220, -219, + -219, -218, -218, -217, -217, -217, -216, -216, -215, -215, + -214, -214, -213, -213, -213, -212, -212, -211, -211, -210, + -210, -210, -209, -209, -208, -208, -207, -207, -206, -206, + -206, -205, -205, -204, -204, -203, -203, -203, -202, -202, + -201, -201, -200, -200, -199, -199, -199, -198, -198, -197, + -197, -196, -196, -196, -195, -195, -194, -194, -193, -193, + -192, -192, -192, -191, -191, -190, -190, -189, -189, -189, + -188, -188, -187, -187, -186, -186, -185, -185, -185, -184, + -184, -183, -183, -182, -182, -182, -181, -181, -180, -180, + -179, -179, -178, -178, -178, -177, -177, -176, -176, -175, + -175, -175, -174, -174, -173, -173, -172, -172, -171, -171, + -171, -170, -170, -169, -169, -168, -168, -168, -167, -167, + -166, -166, -165, -165, -164, -164, -164, -163, -163, -162, + -162, -161, -161, -161, -160, -160, -159, -159, -158, -158, + -157, -157, -157, -156, -156, -155, -155, -154, -154, -154, + -153, -153, -152, -152, -151, -151, -150, -150, -150, -149, + -149, -148, -148, -147, -147, -147, -146, -146, -145, -145, + -144, -144, -143, -143, -143, -142, -142, -141, -141, -140, + -140, -140, -139, -139, -138, -138, -137, -137, -136, -136, + -136, -135, -135, -134, -134, -133, -133, -133, -132, -132, + -131, -131, -130, -130, -129, -129, -129, -128, -128, -127, + -127, -126, -126, -126, -125, -125, -124, -124, -123, -123, + -122, -122, -122, -121, -121, -120, -120, -119, -119, -119, + -118, -118, -117, -117, -116, -116, -115, -115, -115, -114, + -114, -113, -113, -112, -112, -112, -111, -111, -110, -110, + -109, -109, -108, -108, -108, -107, -107, -106, -106, -105, + -105, -105, -104, -104, -103, -103, -102, -102, -101, -101, + -101, -100, -100, -99, -99, -98, -98, -98, -97, -97, + -96, -96, -95, -95, -94, -94, -94, -93, -93, -92, + -92, -91, -91, -91, -90, -90, -89, -89, -88, -88, + -87, -87, -87, -86, -86, -85, -85, -84, -84, -84, + -83, -83, -82, -82, -81, -81, -80, -80, -80, -79, + -79, -78, -78, -77, -77, -77, -76, -76, -75, -75, + -74, -74, -73, -73, -73, -72, -72, -71, -71, -70, + -70, -70, -69, -69, -68, -68, -67, -67, -66, -66, + -66, -65, -65, -64, -64, -63, -63, -63, -62, -62, + -61, -61, -60, -60, -59, -59, -59, -58, -58, -57, + -57, -56, -56, -56, -55, -55, -54, -54, -53, -53, + -52, -52, -52, -51, -51, -50, -50, -49, -49, -49, + -48, -48, -47, -47, -46, -46, -45, -45, -45, -44, + -44, -43, -43, -42, -42, -42, -41, -41, -40, -40, + -39, -39, -38, -38, -38, -37, -37, -36, -36, -35, + -35, -35, -34, -34, -33, -33, -32, -32, -31, -31, + -31, -30, -30, -29, -29, -28, -28, -28, -27, -27, + -26, -26, -25, -25, -24, -24, -24, -23, -23, -22, + -22, -21, -21, -21, -20, -20, -19, -19, -18, -18, + -17, -17, -17, -16, -16, -15, -15, -14, -14, -14, + -13, -13, -12, -12, -11, -11, -10, -10, -10, -9, + -9, -8, -8, -7, -7, -7, -6, -6, -5, -5, + -4, -4, -3, -3, -3, -2, -2, -1, -1, 0, + 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, + 3, 4, 4, 5, 5, 6, 6, 7, 7, 7, + 8, 8, 9, 9, 10, 10, 10, 11, 11, 12, + 12, 13, 13, 14, 14, 14, 15, 15, 16, 16, + 17, 17, 17, 18, 18, 19, 19, 20, 20, 21, + 21, 21, 22, 22, 23, 23, 24, 24, 24, 25, + 25, 26, 26, 27, 27, 28, 28, 28, 29, 29, + 30, 30, 31, 31, 31, 32, 32, 33, 33, 34, + 34, 35, 35, 35, 36, 36, 37, 37, 38, 38, + 38, 39, 39, 40, 40, 41, 41, 42, 42, 42, + 43, 43, 44, 44, 45, 45, 45, 46, 46, 47, + 47, 48, 48, 49, 49, 49, 50, 50, 51, 51, + 52, 52, 52, 53, 53, 54, 54, 55, 55, 56, + 56, 56, 57, 57, 58, 58, 59, 59, 59, 60, + 60, 61, 61, 62, 62, 63, 63, 63, 64, 64, + 65, 65, 66, 66, 66, 67, 67, 68, 68, 69, + 69, 70, 70, 70, 71, 71, 72, 72, 73, 73, + 73, 74, 74, 75, 75, 76, 76, 77, 77, 77, + 78, 78, 79, 79, 80, 80, 80, 81, 81, 82, + 82, 83, 83, 84, 84, 84, 85, 85, 86, 86, + 87, 87, 87, 88, 88, 89, 89, 90, 90, 91, + 91, 91, 92, 92, 93, 93, 94, 94, 94, 95, + 95, 96, 96, 97, 97, 98, 98, 98, 99, 99, + 100, 100, 101, 101, 101, 102, 102, 103, 103, 104, + 104, 105, 105, 105, 106, 106, 107, 107, 108, 108, + 108, 109, 109, 110, 110, 111, 111, 112, 112, 112, + 113, 113, 114, 114, 115, 115, 115, 116, 116, 117, + 117, 118, 118, 119, 119, 119, 120, 120, 121, 121, + 122, 122, 122, 123, 123, 124, 124, 125, 125, 126, + 126, 126, 127, 127, 128, 128, 129, 129, 129, 130, + 130, 131, 131, 132, 132, 133, 133, 133, 134, 134, + 135, 135, 136, 136, 136, 137, 137, 138, 138, 139, + 139, 140, 140, 140, 141, 141, 142, 142, 143, 143, + 143, 144, 144, 145, 145, 146, 146, 147, 147, 147, + 148, 148, 149, 149, 150, 150, 150, 151, 151, 152, + 152, 153, 153, 154, 154, 154, 155, 155, 156, 156, + 157, 157, 157, 158, 158, 159, 159, 160, 160, 161, + 161, 161, 162, 162, 163, 163, 164, 164, 164, 165, + 165, 166, 166, 167, 167, 168, 168, 168, 169, 169, + 170, 170, 171, 171, 171, 172, 172, 173, 173, 174, + 174, 175, 175, 175, 176, 176, 177, 177, 178, 178, + 178, 179, 179, 180, 180, 181, 181, 182, 182, 182, + 183, 183, 184, 184, 185, 185, 185, 186, 186, 187, + 187, 188, 188, 189, 189, 189, 190, 190, 191, 191, + 192, 192, 192, 193, 193, 194, 194, 195, 195, 196, + 196, 196, 197, 197, 198, 198, 199, 199, 199, 200, + 200, 201, 201, 202, 202, 203, 203, 203, 204, 204, + 205, 205, 206, 206, 206, 207, 207, 208, 208, 209, + 209, 210, 210, 210, 211, 211, 212, 212, 213, 213, + 213, 214, 214, 215, 215, 216, 216, 217, 217, 217, + 218, 218, 219, 219, 220, 220, 220, 221, 221, 222, + 222, 223, 223, 224, 224, +}; + +static const gshort floyd_steinberg_error2[] = { + -95, -95, -95, -95, -95, -94, -94, -94, -94, -94, + -93, -93, -93, -93, -93, -93, -92, -92, -92, -92, + -92, -91, -91, -91, -91, -91, -90, -90, -90, -90, + -90, -90, -89, -89, -89, -89, -89, -88, -88, -88, + -88, -88, -87, -87, -87, -87, -87, -87, -86, -86, + -86, -86, -86, -85, -85, -85, -85, -85, -84, -84, + -84, -84, -84, -84, -83, -83, -83, -83, -83, -82, + -82, -82, -82, -82, -81, -81, -81, -81, -81, -81, + -80, -80, -80, -80, -80, -79, -79, -79, -79, -79, + -78, -78, -78, -78, -78, -78, -77, -77, -77, -77, + -77, -76, -76, -76, -76, -76, -75, -75, -75, -75, + -75, -75, -74, -74, -74, -74, -74, -73, -73, -73, + -73, -73, -72, -72, -72, -72, -72, -72, -71, -71, + -71, -71, -71, -70, -70, -70, -70, -70, -69, -69, + -69, -69, -69, -69, -68, -68, -68, -68, -68, -67, + -67, -67, -67, -67, -66, -66, -66, -66, -66, -66, + -65, -65, -65, -65, -65, -64, -64, -64, -64, -64, + -63, -63, -63, -63, -63, -63, -62, -62, -62, -62, + -62, -61, -61, -61, -61, -61, -60, -60, -60, -60, + -60, -60, -59, -59, -59, -59, -59, -58, -58, -58, + -58, -58, -57, -57, -57, -57, -57, -57, -56, -56, + -56, -56, -56, -55, -55, -55, -55, -55, -54, -54, + -54, -54, -54, -54, -53, -53, -53, -53, -53, -52, + -52, -52, -52, -52, -51, -51, -51, -51, -51, -51, + -50, -50, -50, -50, -50, -49, -49, -49, -49, -49, + -48, -48, -48, -48, -48, -48, -47, -47, -47, -47, + -47, -46, -46, -46, -46, -46, -45, -45, -45, -45, + -45, -45, -44, -44, -44, -44, -44, -43, -43, -43, + -43, -43, -42, -42, -42, -42, -42, -42, -41, -41, + -41, -41, -41, -40, -40, -40, -40, -40, -39, -39, + -39, -39, -39, -39, -38, -38, -38, -38, -38, -37, + -37, -37, -37, -37, -36, -36, -36, -36, -36, -36, + -35, -35, -35, -35, -35, -34, -34, -34, -34, -34, + -33, -33, -33, -33, -33, -33, -32, -32, -32, -32, + -32, -31, -31, -31, -31, -31, -30, -30, -30, -30, + -30, -30, -29, -29, -29, -29, -29, -28, -28, -28, + -28, -28, -27, -27, -27, -27, -27, -27, -26, -26, + -26, -26, -26, -25, -25, -25, -25, -25, -24, -24, + -24, -24, -24, -24, -23, -23, -23, -23, -23, -22, + -22, -22, -22, -22, -21, -21, -21, -21, -21, -21, + -20, -20, -20, -20, -20, -19, -19, -19, -19, -19, + -18, -18, -18, -18, -18, -18, -17, -17, -17, -17, + -17, -16, -16, -16, -16, -16, -15, -15, -15, -15, + -15, -15, -14, -14, -14, -14, -14, -13, -13, -13, + -13, -13, -12, -12, -12, -12, -12, -12, -11, -11, + -11, -11, -11, -10, -10, -10, -10, -10, -9, -9, + -9, -9, -9, -9, -8, -8, -8, -8, -8, -7, + -7, -7, -7, -7, -6, -6, -6, -6, -6, -6, + -5, -5, -5, -5, -5, -4, -4, -4, -4, -4, + -3, -3, -3, -3, -3, -3, -2, -2, -2, -2, + -2, -1, -1, -1, -1, -1, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, + 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, + 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, + 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, + 7, 7, 7, 7, 8, 8, 8, 8, 8, 9, + 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, + 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, + 12, 13, 13, 13, 13, 13, 14, 14, 14, 14, + 14, 15, 15, 15, 15, 15, 15, 16, 16, 16, + 16, 16, 17, 17, 17, 17, 17, 18, 18, 18, + 18, 18, 18, 19, 19, 19, 19, 19, 20, 20, + 20, 20, 20, 21, 21, 21, 21, 21, 21, 22, + 22, 22, 22, 22, 23, 23, 23, 23, 23, 24, + 24, 24, 24, 24, 24, 25, 25, 25, 25, 25, + 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, + 27, 28, 28, 28, 28, 28, 29, 29, 29, 29, + 29, 30, 30, 30, 30, 30, 30, 31, 31, 31, + 31, 31, 32, 32, 32, 32, 32, 33, 33, 33, + 33, 33, 33, 34, 34, 34, 34, 34, 35, 35, + 35, 35, 35, 36, 36, 36, 36, 36, 36, 37, + 37, 37, 37, 37, 38, 38, 38, 38, 38, 39, + 39, 39, 39, 39, 39, 40, 40, 40, 40, 40, + 41, 41, 41, 41, 41, 42, 42, 42, 42, 42, + 42, 43, 43, 43, 43, 43, 44, 44, 44, 44, + 44, 45, 45, 45, 45, 45, 45, 46, 46, 46, + 46, 46, 47, 47, 47, 47, 47, 48, 48, 48, + 48, 48, 48, 49, 49, 49, 49, 49, 50, 50, + 50, 50, 50, 51, 51, 51, 51, 51, 51, 52, + 52, 52, 52, 52, 53, 53, 53, 53, 53, 54, + 54, 54, 54, 54, 54, 55, 55, 55, 55, 55, + 56, 56, 56, 56, 56, 57, 57, 57, 57, 57, + 57, 58, 58, 58, 58, 58, 59, 59, 59, 59, + 59, 60, 60, 60, 60, 60, 60, 61, 61, 61, + 61, 61, 62, 62, 62, 62, 62, 63, 63, 63, + 63, 63, 63, 64, 64, 64, 64, 64, 65, 65, + 65, 65, 65, 66, 66, 66, 66, 66, 66, 67, + 67, 67, 67, 67, 68, 68, 68, 68, 68, 69, + 69, 69, 69, 69, 69, 70, 70, 70, 70, 70, + 71, 71, 71, 71, 71, 72, 72, 72, 72, 72, + 72, 73, 73, 73, 73, 73, 74, 74, 74, 74, + 74, 75, 75, 75, 75, 75, 75, 76, 76, 76, + 76, 76, 77, 77, 77, 77, 77, 78, 78, 78, + 78, 78, 78, 79, 79, 79, 79, 79, 80, 80, + 80, 80, 80, 81, 81, 81, 81, 81, 81, 82, + 82, 82, 82, 82, 83, 83, 83, 83, 83, 84, + 84, 84, 84, 84, 84, 85, 85, 85, 85, 85, + 86, 86, 86, 86, 86, 87, 87, 87, 87, 87, + 87, 88, 88, 88, 88, 88, 89, 89, 89, 89, + 89, 90, 90, 90, 90, 90, 90, 91, 91, 91, + 91, 91, 92, 92, 92, 92, 92, 93, 93, 93, + 93, 93, 93, 94, 94, 94, 94, 94, 95, 95, + 95, 95, 95, 96, 96, +}; + +static const gshort floyd_steinberg_error3[] = { + -159, -159, -159, -158, -158, -158, -157, -157, -157, -156, + -156, -156, -155, -155, -155, -155, -154, -154, -154, -153, + -153, -153, -152, -152, -152, -151, -151, -151, -150, -150, + -150, -150, -149, -149, -149, -148, -148, -148, -147, -147, + -147, -146, -146, -146, -145, -145, -145, -145, -144, -144, + -144, -143, -143, -143, -142, -142, -142, -141, -141, -141, + -140, -140, -140, -140, -139, -139, -139, -138, -138, -138, + -137, -137, -137, -136, -136, -136, -135, -135, -135, -135, + -134, -134, -134, -133, -133, -133, -132, -132, -132, -131, + -131, -131, -130, -130, -130, -130, -129, -129, -129, -128, + -128, -128, -127, -127, -127, -126, -126, -126, -125, -125, + -125, -125, -124, -124, -124, -123, -123, -123, -122, -122, + -122, -121, -121, -121, -120, -120, -120, -120, -119, -119, + -119, -118, -118, -118, -117, -117, -117, -116, -116, -116, + -115, -115, -115, -115, -114, -114, -114, -113, -113, -113, + -112, -112, -112, -111, -111, -111, -110, -110, -110, -110, + -109, -109, -109, -108, -108, -108, -107, -107, -107, -106, + -106, -106, -105, -105, -105, -105, -104, -104, -104, -103, + -103, -103, -102, -102, -102, -101, -101, -101, -100, -100, + -100, -100, -99, -99, -99, -98, -98, -98, -97, -97, + -97, -96, -96, -96, -95, -95, -95, -95, -94, -94, + -94, -93, -93, -93, -92, -92, -92, -91, -91, -91, + -90, -90, -90, -90, -89, -89, -89, -88, -88, -88, + -87, -87, -87, -86, -86, -86, -85, -85, -85, -85, + -84, -84, -84, -83, -83, -83, -82, -82, -82, -81, + -81, -81, -80, -80, -80, -80, -79, -79, -79, -78, + -78, -78, -77, -77, -77, -76, -76, -76, -75, -75, + -75, -75, -74, -74, -74, -73, -73, -73, -72, -72, + -72, -71, -71, -71, -70, -70, -70, -70, -69, -69, + -69, -68, -68, -68, -67, -67, -67, -66, -66, -66, + -65, -65, -65, -65, -64, -64, -64, -63, -63, -63, + -62, -62, -62, -61, -61, -61, -60, -60, -60, -60, + -59, -59, -59, -58, -58, -58, -57, -57, -57, -56, + -56, -56, -55, -55, -55, -55, -54, -54, -54, -53, + -53, -53, -52, -52, -52, -51, -51, -51, -50, -50, + -50, -50, -49, -49, -49, -48, -48, -48, -47, -47, + -47, -46, -46, -46, -45, -45, -45, -45, -44, -44, + -44, -43, -43, -43, -42, -42, -42, -41, -41, -41, + -40, -40, -40, -40, -39, -39, -39, -38, -38, -38, + -37, -37, -37, -36, -36, -36, -35, -35, -35, -35, + -34, -34, -34, -33, -33, -33, -32, -32, -32, -31, + -31, -31, -30, -30, -30, -30, -29, -29, -29, -28, + -28, -28, -27, -27, -27, -26, -26, -26, -25, -25, + -25, -25, -24, -24, -24, -23, -23, -23, -22, -22, + -22, -21, -21, -21, -20, -20, -20, -20, -19, -19, + -19, -18, -18, -18, -17, -17, -17, -16, -16, -16, + -15, -15, -15, -15, -14, -14, -14, -13, -13, -13, + -12, -12, -12, -11, -11, -11, -10, -10, -10, -10, + -9, -9, -9, -8, -8, -8, -7, -7, -7, -6, + -6, -6, -5, -5, -5, -5, -4, -4, -4, -3, + -3, -3, -2, -2, -2, -1, -1, -1, 0, 0, + 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, + 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, + 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, + 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, + 12, 12, 12, 13, 13, 13, 14, 14, 14, 15, + 15, 15, 15, 16, 16, 16, 17, 17, 17, 18, + 18, 18, 19, 19, 19, 20, 20, 20, 20, 21, + 21, 21, 22, 22, 22, 23, 23, 23, 24, 24, + 24, 25, 25, 25, 25, 26, 26, 26, 27, 27, + 27, 28, 28, 28, 29, 29, 29, 30, 30, 30, + 30, 31, 31, 31, 32, 32, 32, 33, 33, 33, + 34, 34, 34, 35, 35, 35, 35, 36, 36, 36, + 37, 37, 37, 38, 38, 38, 39, 39, 39, 40, + 40, 40, 40, 41, 41, 41, 42, 42, 42, 43, + 43, 43, 44, 44, 44, 45, 45, 45, 45, 46, + 46, 46, 47, 47, 47, 48, 48, 48, 49, 49, + 49, 50, 50, 50, 50, 51, 51, 51, 52, 52, + 52, 53, 53, 53, 54, 54, 54, 55, 55, 55, + 55, 56, 56, 56, 57, 57, 57, 58, 58, 58, + 59, 59, 59, 60, 60, 60, 60, 61, 61, 61, + 62, 62, 62, 63, 63, 63, 64, 64, 64, 65, + 65, 65, 65, 66, 66, 66, 67, 67, 67, 68, + 68, 68, 69, 69, 69, 70, 70, 70, 70, 71, + 71, 71, 72, 72, 72, 73, 73, 73, 74, 74, + 74, 75, 75, 75, 75, 76, 76, 76, 77, 77, + 77, 78, 78, 78, 79, 79, 79, 80, 80, 80, + 80, 81, 81, 81, 82, 82, 82, 83, 83, 83, + 84, 84, 84, 85, 85, 85, 85, 86, 86, 86, + 87, 87, 87, 88, 88, 88, 89, 89, 89, 90, + 90, 90, 90, 91, 91, 91, 92, 92, 92, 93, + 93, 93, 94, 94, 94, 95, 95, 95, 95, 96, + 96, 96, 97, 97, 97, 98, 98, 98, 99, 99, + 99, 100, 100, 100, 100, 101, 101, 101, 102, 102, + 102, 103, 103, 103, 104, 104, 104, 105, 105, 105, + 105, 106, 106, 106, 107, 107, 107, 108, 108, 108, + 109, 109, 109, 110, 110, 110, 110, 111, 111, 111, + 112, 112, 112, 113, 113, 113, 114, 114, 114, 115, + 115, 115, 115, 116, 116, 116, 117, 117, 117, 118, + 118, 118, 119, 119, 119, 120, 120, 120, 120, 121, + 121, 121, 122, 122, 122, 123, 123, 123, 124, 124, + 124, 125, 125, 125, 125, 126, 126, 126, 127, 127, + 127, 128, 128, 128, 129, 129, 129, 130, 130, 130, + 130, 131, 131, 131, 132, 132, 132, 133, 133, 133, + 134, 134, 134, 135, 135, 135, 135, 136, 136, 136, + 137, 137, 137, 138, 138, 138, 139, 139, 139, 140, + 140, 140, 140, 141, 141, 141, 142, 142, 142, 143, + 143, 143, 144, 144, 144, 145, 145, 145, 145, 146, + 146, 146, 147, 147, 147, 148, 148, 148, 149, 149, + 149, 150, 150, 150, 150, 151, 151, 151, 152, 152, + 152, 153, 153, 153, 154, 154, 154, 155, 155, 155, + 155, 156, 156, 156, 157, 157, 157, 158, 158, 158, + 159, 159, 159, 160, 160, +}; + +static const gshort floyd_steinberg_error4[] = { + -34, -33, -33, -33, -33, -33, -34, -33, -32, -33, + -33, -33, -33, -33, -32, -31, -33, -32, -32, -32, + -32, -32, -33, -32, -31, -32, -32, -32, -32, -32, + -31, -30, -32, -31, -31, -31, -31, -31, -32, -31, + -30, -31, -31, -31, -31, -31, -30, -29, -31, -30, + -30, -30, -30, -30, -31, -30, -29, -30, -30, -30, + -30, -30, -29, -28, -30, -29, -29, -29, -29, -29, + -30, -29, -28, -29, -29, -29, -29, -29, -28, -27, + -29, -28, -28, -28, -28, -28, -29, -28, -27, -28, + -28, -28, -28, -28, -27, -26, -28, -27, -27, -27, + -27, -27, -28, -27, -26, -27, -27, -27, -27, -27, + -26, -25, -27, -26, -26, -26, -26, -26, -27, -26, + -25, -26, -26, -26, -26, -26, -25, -24, -26, -25, + -25, -25, -25, -25, -26, -25, -24, -25, -25, -25, + -25, -25, -24, -23, -25, -24, -24, -24, -24, -24, + -25, -24, -23, -24, -24, -24, -24, -24, -23, -22, + -24, -23, -23, -23, -23, -23, -24, -23, -22, -23, + -23, -23, -23, -23, -22, -21, -23, -22, -22, -22, + -22, -22, -23, -22, -21, -22, -22, -22, -22, -22, + -21, -20, -22, -21, -21, -21, -21, -21, -22, -21, + -20, -21, -21, -21, -21, -21, -20, -19, -21, -20, + -20, -20, -20, -20, -21, -20, -19, -20, -20, -20, + -20, -20, -19, -18, -20, -19, -19, -19, -19, -19, + -20, -19, -18, -19, -19, -19, -19, -19, -18, -17, + -19, -18, -18, -18, -18, -18, -19, -18, -17, -18, + -18, -18, -18, -18, -17, -16, -18, -17, -17, -17, + -17, -17, -18, -17, -16, -17, -17, -17, -17, -17, + -16, -15, -17, -16, -16, -16, -16, -16, -17, -16, + -15, -16, -16, -16, -16, -16, -15, -14, -16, -15, + -15, -15, -15, -15, -16, -15, -14, -15, -15, -15, + -15, -15, -14, -13, -15, -14, -14, -14, -14, -14, + -15, -14, -13, -14, -14, -14, -14, -14, -13, -12, + -14, -13, -13, -13, -13, -13, -14, -13, -12, -13, + -13, -13, -13, -13, -12, -11, -13, -12, -12, -12, + -12, -12, -13, -12, -11, -12, -12, -12, -12, -12, + -11, -10, -12, -11, -11, -11, -11, -11, -12, -11, + -10, -11, -11, -11, -11, -11, -10, -9, -11, -10, + -10, -10, -10, -10, -11, -10, -9, -10, -10, -10, + -10, -10, -9, -8, -10, -9, -9, -9, -9, -9, + -10, -9, -8, -9, -9, -9, -9, -9, -8, -7, + -9, -8, -8, -8, -8, -8, -9, -8, -7, -8, + -8, -8, -8, -8, -7, -6, -8, -7, -7, -7, + -7, -7, -8, -7, -6, -7, -7, -7, -7, -7, + -6, -5, -7, -6, -6, -6, -6, -6, -7, -6, + -5, -6, -6, -6, -6, -6, -5, -4, -6, -5, + -5, -5, -5, -5, -6, -5, -4, -5, -5, -5, + -5, -5, -4, -3, -5, -4, -4, -4, -4, -4, + -5, -4, -3, -4, -4, -4, -4, -4, -3, -2, + -4, -3, -3, -3, -3, -3, -4, -3, -2, -3, + -3, -3, -3, -3, -2, -1, -3, -2, -2, -2, + -2, -2, -3, -2, -1, -2, -2, -2, -2, -2, + -1, 0, 1, 2, 2, 2, 2, 2, 1, 2, + 3, 2, 2, 2, 2, 2, 3, 1, 2, 3, + 3, 3, 3, 3, 2, 3, 4, 3, 3, 3, + 3, 3, 4, 2, 3, 4, 4, 4, 4, 4, + 3, 4, 5, 4, 4, 4, 4, 4, 5, 3, + 4, 5, 5, 5, 5, 5, 4, 5, 6, 5, + 5, 5, 5, 5, 6, 4, 5, 6, 6, 6, + 6, 6, 5, 6, 7, 6, 6, 6, 6, 6, + 7, 5, 6, 7, 7, 7, 7, 7, 6, 7, + 8, 7, 7, 7, 7, 7, 8, 6, 7, 8, + 8, 8, 8, 8, 7, 8, 9, 8, 8, 8, + 8, 8, 9, 7, 8, 9, 9, 9, 9, 9, + 8, 9, 10, 9, 9, 9, 9, 9, 10, 8, + 9, 10, 10, 10, 10, 10, 9, 10, 11, 10, + 10, 10, 10, 10, 11, 9, 10, 11, 11, 11, + 11, 11, 10, 11, 12, 11, 11, 11, 11, 11, + 12, 10, 11, 12, 12, 12, 12, 12, 11, 12, + 13, 12, 12, 12, 12, 12, 13, 11, 12, 13, + 13, 13, 13, 13, 12, 13, 14, 13, 13, 13, + 13, 13, 14, 12, 13, 14, 14, 14, 14, 14, + 13, 14, 15, 14, 14, 14, 14, 14, 15, 13, + 14, 15, 15, 15, 15, 15, 14, 15, 16, 15, + 15, 15, 15, 15, 16, 14, 15, 16, 16, 16, + 16, 16, 15, 16, 17, 16, 16, 16, 16, 16, + 17, 15, 16, 17, 17, 17, 17, 17, 16, 17, + 18, 17, 17, 17, 17, 17, 18, 16, 17, 18, + 18, 18, 18, 18, 17, 18, 19, 18, 18, 18, + 18, 18, 19, 17, 18, 19, 19, 19, 19, 19, + 18, 19, 20, 19, 19, 19, 19, 19, 20, 18, + 19, 20, 20, 20, 20, 20, 19, 20, 21, 20, + 20, 20, 20, 20, 21, 19, 20, 21, 21, 21, + 21, 21, 20, 21, 22, 21, 21, 21, 21, 21, + 22, 20, 21, 22, 22, 22, 22, 22, 21, 22, + 23, 22, 22, 22, 22, 22, 23, 21, 22, 23, + 23, 23, 23, 23, 22, 23, 24, 23, 23, 23, + 23, 23, 24, 22, 23, 24, 24, 24, 24, 24, + 23, 24, 25, 24, 24, 24, 24, 24, 25, 23, + 24, 25, 25, 25, 25, 25, 24, 25, 26, 25, + 25, 25, 25, 25, 26, 24, 25, 26, 26, 26, + 26, 26, 25, 26, 27, 26, 26, 26, 26, 26, + 27, 25, 26, 27, 27, 27, 27, 27, 26, 27, + 28, 27, 27, 27, 27, 27, 28, 26, 27, 28, + 28, 28, 28, 28, 27, 28, 29, 28, 28, 28, + 28, 28, 29, 27, 28, 29, 29, 29, 29, 29, + 28, 29, 30, 29, 29, 29, 29, 29, 30, 28, + 29, 30, 30, 30, 30, 30, 29, 30, 31, 30, + 30, 30, 30, 30, 31, 29, 30, 31, 31, 31, + 31, 31, 30, 31, 32, 31, 31, 31, 31, 31, + 32, 30, 31, 32, 32, 32, 32, 32, 31, 32, + 33, 32, 32, 32, 32, 32, 33, 31, 32, 33, + 33, 33, 33, 33, 32, 33, 34, 33, 33, 33, + 33, 33, 34, 32, 33, +}; + +#endif /* __GIMP_IMAGE_CONVERT_FSDITHER_H__ */ |