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Diffstat (limited to 'gfx/harfbuzz/src/main.cc')
| -rw-r--r-- | gfx/harfbuzz/src/main.cc | 532 |
1 files changed, 532 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/main.cc b/gfx/harfbuzz/src/main.cc new file mode 100644 index 0000000000..bb18ebe386 --- /dev/null +++ b/gfx/harfbuzz/src/main.cc @@ -0,0 +1,532 @@ +/* + * Copyright © 2007,2008,2009 Red Hat, Inc. + * Copyright © 2018,2019,2020 Ebrahim Byagowi + * Copyright © 2018 Khaled Hosny + * + * This is part of HarfBuzz, a text shaping library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + * + * Red Hat Author(s): Behdad Esfahbod + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "hb.h" +#include "hb-ot.h" + +#include <cassert> +#include <cstdlib> +#include <cstdio> +#include <cstring> + +#ifdef HB_NO_OPEN +#define hb_blob_create_from_file_or_fail(x) hb_blob_get_empty () +#endif + +#if !defined(HB_NO_COLOR) && !defined(HB_NO_DRAW) +static void +svg_dump (hb_face_t *face, unsigned face_index) +{ + unsigned glyph_count = hb_face_get_glyph_count (face); + + for (unsigned glyph_id = 0; glyph_id < glyph_count; ++glyph_id) + { + hb_blob_t *blob = hb_ot_color_glyph_reference_svg (face, glyph_id); + + if (hb_blob_get_length (blob) == 0) continue; + + unsigned length; + const char *data = hb_blob_get_data (blob, &length); + + char output_path[255]; + snprintf (output_path, sizeof output_path, + "out/svg-%u-%u.svg%s", + glyph_id, + face_index, + // append "z" if the content is gzipped, https://stackoverflow.com/a/6059405 + (length > 2 && (data[0] == '\x1F') && (data[1] == '\x8B')) ? "z" : ""); + + FILE *f = fopen (output_path, "wb"); + fwrite (data, 1, length, f); + fclose (f); + + hb_blob_destroy (blob); + } +} + +/* _png API is so easy to use unlike the below code, don't get confused */ +static void +png_dump (hb_face_t *face, unsigned face_index) +{ + unsigned glyph_count = hb_face_get_glyph_count (face); + hb_font_t *font = hb_font_create (face); + + /* scans the font for strikes */ + unsigned sample_glyph_id; + /* we don't care about different strikes for different glyphs at this point */ + for (sample_glyph_id = 0; sample_glyph_id < glyph_count; ++sample_glyph_id) + { + hb_blob_t *blob = hb_ot_color_glyph_reference_png (font, sample_glyph_id); + unsigned blob_length = hb_blob_get_length (blob); + hb_blob_destroy (blob); + if (blob_length != 0) + break; + } + + unsigned upem = hb_face_get_upem (face); + unsigned blob_length = 0; + unsigned strike = 0; + for (unsigned ppem = 1; ppem < upem; ++ppem) + { + hb_font_set_ppem (font, ppem, ppem); + hb_blob_t *blob = hb_ot_color_glyph_reference_png (font, sample_glyph_id); + unsigned new_blob_length = hb_blob_get_length (blob); + hb_blob_destroy (blob); + if (new_blob_length != blob_length) + { + for (unsigned glyph_id = 0; glyph_id < glyph_count; ++glyph_id) + { + hb_blob_t *blob = hb_ot_color_glyph_reference_png (font, glyph_id); + + if (hb_blob_get_length (blob) == 0) continue; + + unsigned length; + const char *data = hb_blob_get_data (blob, &length); + + char output_path[255]; + snprintf (output_path, sizeof output_path, "out/png-%u-%u-%u.png", glyph_id, strike, face_index); + + FILE *f = fopen (output_path, "wb"); + fwrite (data, 1, length, f); + fclose (f); + + hb_blob_destroy (blob); + } + + strike++; + blob_length = new_blob_length; + } + } + + hb_font_destroy (font); +} + +struct draw_data_t +{ + FILE *f; + hb_position_t ascender; +}; + +static void +move_to (hb_draw_funcs_t *, draw_data_t *draw_data, + hb_draw_state_t *, + float to_x, float to_y, + void *) +{ + fprintf (draw_data->f, "M%g,%g", to_x, draw_data->ascender - to_y); +} + +static void +line_to (hb_draw_funcs_t *, draw_data_t *draw_data, + hb_draw_state_t *, + float to_x, float to_y, + void *) +{ + fprintf (draw_data->f, "L%g,%g", to_x, draw_data->ascender - to_y); +} + +static void +quadratic_to (hb_draw_funcs_t *, draw_data_t *draw_data, + hb_draw_state_t *, + float control_x, float control_y, + float to_x, float to_y, + void *) +{ + fprintf (draw_data->f, "Q%g,%g %g,%g", control_x, draw_data->ascender - control_y, + to_x, draw_data->ascender - to_y); +} + +static void +cubic_to (hb_draw_funcs_t *, draw_data_t *draw_data, + hb_draw_state_t *, + float control1_x, float control1_y, + float control2_x, float control2_y, + float to_x, float to_y, + void *) +{ + fprintf (draw_data->f, "C%g,%g %g,%g %g,%g", control1_x, draw_data->ascender - control1_y, + control2_x, draw_data->ascender - control2_y, + to_x, draw_data->ascender - to_y); +} + +static void +close_path (hb_draw_funcs_t *, draw_data_t *draw_data, + hb_draw_state_t *, + void *) +{ + fprintf (draw_data->f, "Z"); +} + +static void +layered_glyph_dump (hb_font_t *font, hb_draw_funcs_t *funcs, unsigned face_index) +{ + hb_face_t *face = hb_font_get_face (font); + unsigned palette_count = hb_ot_color_palette_get_count (face); + for (unsigned palette = 0; palette < palette_count; ++palette) + { + unsigned num_colors = hb_ot_color_palette_get_colors (face, palette, 0, nullptr, nullptr); + if (!num_colors) continue; + + hb_color_t *colors = (hb_color_t*) calloc (num_colors, sizeof (hb_color_t)); + hb_ot_color_palette_get_colors (face, palette, 0, &num_colors, colors); + if (!num_colors) + { + free (colors); + continue; + } + + unsigned num_glyphs = hb_face_get_glyph_count (face); + for (hb_codepoint_t gid = 0; gid < num_glyphs; ++gid) + { + unsigned num_layers = hb_ot_color_glyph_get_layers (face, gid, 0, nullptr, nullptr); + if (!num_layers) continue; + + hb_ot_color_layer_t *layers = (hb_ot_color_layer_t*) malloc (num_layers * sizeof (hb_ot_color_layer_t)); + + hb_ot_color_glyph_get_layers (face, gid, 0, &num_layers, layers); + if (num_layers) + { + hb_font_extents_t font_extents; + hb_font_get_extents_for_direction (font, HB_DIRECTION_LTR, &font_extents); + hb_glyph_extents_t extents = {0}; + if (!hb_font_get_glyph_extents (font, gid, &extents)) + { + printf ("Skip gid: %d\n", gid); + continue; + } + + char output_path[255]; + snprintf (output_path, sizeof output_path, "out/colr-%u-%u-%u.svg", gid, palette, face_index); + FILE *f = fopen (output_path, "wb"); + fprintf (f, "<svg xmlns=\"http://www.w3.org/2000/svg\"" + " viewBox=\"%d %d %d %d\">\n", + extents.x_bearing, 0, + extents.x_bearing + extents.width, -extents.height); + draw_data_t draw_data; + draw_data.ascender = extents.y_bearing; + draw_data.f = f; + + for (unsigned layer = 0; layer < num_layers; ++layer) + { + hb_color_t color = 0x000000FF; + if (layers[layer].color_index != 0xFFFF) + color = colors[layers[layer].color_index]; + fprintf (f, "<path fill=\"#%02X%02X%02X\" ", + hb_color_get_red (color), hb_color_get_green (color), hb_color_get_green (color)); + if (hb_color_get_alpha (color) != 255) + fprintf (f, "fill-opacity=\"%.3f\"", (double) hb_color_get_alpha (color) / 255.); + fprintf (f, "d=\""); + hb_font_get_glyph_shape (font, layers[layer].glyph, funcs, &draw_data); + fprintf (f, "\"/>\n"); + } + + fprintf (f, "</svg>"); + fclose (f); + } + free (layers); + } + + free (colors); + } +} + +static void +dump_glyphs (hb_font_t *font, hb_draw_funcs_t *funcs, unsigned face_index) +{ + unsigned num_glyphs = hb_face_get_glyph_count (hb_font_get_face (font)); + for (unsigned gid = 0; gid < num_glyphs; ++gid) + { + hb_font_extents_t font_extents; + hb_font_get_extents_for_direction (font, HB_DIRECTION_LTR, &font_extents); + hb_glyph_extents_t extents = {0}; + if (!hb_font_get_glyph_extents (font, gid, &extents)) + { + printf ("Skip gid: %d\n", gid); + continue; + } + + char output_path[255]; + snprintf (output_path, sizeof output_path, "out/%u-%u.svg", face_index, gid); + FILE *f = fopen (output_path, "wb"); + fprintf (f, "<svg xmlns=\"http://www.w3.org/2000/svg\"" + " viewBox=\"%d %d %d %d\"><path d=\"", + extents.x_bearing, 0, + extents.x_bearing + extents.width, font_extents.ascender - font_extents.descender); + draw_data_t draw_data; + draw_data.ascender = font_extents.ascender; + draw_data.f = f; + hb_font_get_glyph_shape (font, gid, funcs, &draw_data); + fprintf (f, "\"/></svg>"); + fclose (f); + } +} + +static void +dump_glyphs (hb_blob_t *blob, const char *font_name) +{ + FILE *font_name_file = fopen ("out/.dumped_font_name", "r"); + if (font_name_file) + { + fprintf (stderr, "Purge or rename ./out folder if you like to run a glyph dump,\n" + "run it like `rm -rf out && mkdir out && src/main font-file.ttf`\n"); + return; + } + + font_name_file = fopen ("out/.dumped_font_name", "w"); + if (!font_name_file) + { + fprintf (stderr, "./out is not accessible as a folder, create it please\n"); + return; + } + fwrite (font_name, 1, strlen (font_name), font_name_file); + fclose (font_name_file); + + hb_draw_funcs_t *funcs = hb_draw_funcs_create (); + hb_draw_funcs_set_move_to_func (funcs, (hb_draw_move_to_func_t) move_to, nullptr, nullptr); + hb_draw_funcs_set_line_to_func (funcs, (hb_draw_line_to_func_t) line_to, nullptr, nullptr); + hb_draw_funcs_set_quadratic_to_func (funcs, (hb_draw_quadratic_to_func_t) quadratic_to, nullptr, nullptr); + hb_draw_funcs_set_cubic_to_func (funcs, (hb_draw_cubic_to_func_t) cubic_to, nullptr, nullptr); + hb_draw_funcs_set_close_path_func (funcs, (hb_draw_close_path_func_t) close_path, nullptr, nullptr); + + unsigned num_faces = hb_face_count (blob); + for (unsigned face_index = 0; face_index < num_faces; ++face_index) + { + hb_face_t *face = hb_face_create (blob, face_index); + hb_font_t *font = hb_font_create (face); + + if (hb_ot_color_has_png (face)) + printf ("Dumping png (CBDT/sbix)...\n"); + png_dump (face, face_index); + + if (hb_ot_color_has_svg (face)) + printf ("Dumping svg (SVG )...\n"); + svg_dump (face, face_index); + + if (hb_ot_color_has_layers (face) && hb_ot_color_has_palettes (face)) + printf ("Dumping layered color glyphs (COLR/CPAL)...\n"); + layered_glyph_dump (font, funcs, face_index); + + dump_glyphs (font, funcs, face_index); + + hb_font_destroy (font); + hb_face_destroy (face); + } + + hb_draw_funcs_destroy (funcs); +} +#endif + +#ifndef MAIN_CC_NO_PRIVATE_API +/* Only this part of this mini app uses private API */ +#include "hb-static.cc" +#include "hb-open-file.hh" +#include "hb-ot-layout-gdef-table.hh" +#include "hb-ot-layout-gsubgpos.hh" + +using namespace OT; + +static void +print_layout_info_using_private_api (hb_blob_t *blob) +{ + const char *font_data = hb_blob_get_data (blob, nullptr); + hb_blob_t *font_blob = hb_sanitize_context_t ().sanitize_blob<OpenTypeFontFile> (blob); + const OpenTypeFontFile* sanitized = font_blob->as<OpenTypeFontFile> (); + if (!font_blob->data) + { + printf ("Sanitization of the file wasn't successful. Exit"); + exit (1); + } + const OpenTypeFontFile& ot = *sanitized; + + switch (ot.get_tag ()) + { + case OpenTypeFontFile::TrueTypeTag: + printf ("OpenType font with TrueType outlines\n"); + break; + case OpenTypeFontFile::CFFTag: + printf ("OpenType font with CFF (Type1) outlines\n"); + break; + case OpenTypeFontFile::TTCTag: + printf ("TrueType Collection of OpenType fonts\n"); + break; + case OpenTypeFontFile::TrueTag: + printf ("Obsolete Apple TrueType font\n"); + break; + case OpenTypeFontFile::Typ1Tag: + printf ("Obsolete Apple Type1 font in SFNT container\n"); + break; + case OpenTypeFontFile::DFontTag: + printf ("DFont Mac Resource Fork\n"); + break; + default: + printf ("Unknown font format\n"); + break; + } + + unsigned num_faces = hb_face_count (blob); + printf ("%d font(s) found in file\n", num_faces); + for (unsigned n_font = 0; n_font < num_faces; ++n_font) + { + const OpenTypeFontFace &font = ot.get_face (n_font); + printf ("Font %d of %d:\n", n_font, num_faces); + + unsigned num_tables = font.get_table_count (); + printf (" %d table(s) found in font\n", num_tables); + for (unsigned n_table = 0; n_table < num_tables; ++n_table) + { + const OpenTypeTable &table = font.get_table (n_table); + printf (" Table %2d of %2d: %.4s (0x%08x+0x%08x)\n", n_table, num_tables, + (const char *) table.tag, + (unsigned) table.offset, + (unsigned) table.length); + + switch (table.tag) + { + + case HB_OT_TAG_GSUB: + case HB_OT_TAG_GPOS: + { + + const GSUBGPOS &g = *reinterpret_cast<const GSUBGPOS *> (font_data + table.offset); + + unsigned num_scripts = g.get_script_count (); + printf (" %d script(s) found in table\n", num_scripts); + for (unsigned n_script = 0; n_script < num_scripts; ++n_script) + { + const Script &script = g.get_script (n_script); + printf (" Script %2d of %2d: %.4s\n", n_script, num_scripts, + (const char *) g.get_script_tag (n_script)); + + if (!script.has_default_lang_sys ()) + printf (" No default language system\n"); + int num_langsys = script.get_lang_sys_count (); + printf (" %d language system(s) found in script\n", num_langsys); + for (int n_langsys = script.has_default_lang_sys () ? -1 : 0; n_langsys < num_langsys; ++n_langsys) + { + const LangSys &langsys = n_langsys == -1 + ? script.get_default_lang_sys () + : script.get_lang_sys (n_langsys); + if (n_langsys == -1) + printf (" Default Language System\n"); + else + printf (" Language System %2d of %2d: %.4s\n", n_langsys, num_langsys, + (const char *) script.get_lang_sys_tag (n_langsys)); + if (!langsys.has_required_feature ()) + printf (" No required feature\n"); + else + printf (" Required feature index: %d\n", + langsys.get_required_feature_index ()); + + unsigned num_features = langsys.get_feature_count (); + printf (" %d feature(s) found in language system\n", num_features); + for (unsigned n_feature = 0; n_feature < num_features; ++n_feature) + { + printf (" Feature index %2d of %2d: %d\n", n_feature, num_features, + langsys.get_feature_index (n_feature)); + } + } + } + + unsigned num_features = g.get_feature_count (); + printf (" %d feature(s) found in table\n", num_features); + for (unsigned n_feature = 0; n_feature < num_features; ++n_feature) + { + const Feature &feature = g.get_feature (n_feature); + unsigned num_lookups = feature.get_lookup_count (); + printf (" Feature %2d of %2d: %c%c%c%c\n", n_feature, num_features, + HB_UNTAG (g.get_feature_tag (n_feature))); + + printf (" %d lookup(s) found in feature\n", num_lookups); + for (unsigned n_lookup = 0; n_lookup < num_lookups; ++n_lookup) { + printf (" Lookup index %2d of %2d: %d\n", n_lookup, num_lookups, + feature.get_lookup_index (n_lookup)); + } + } + + unsigned num_lookups = g.get_lookup_count (); + printf (" %d lookup(s) found in table\n", num_lookups); + for (unsigned n_lookup = 0; n_lookup < num_lookups; ++n_lookup) + { + const Lookup &lookup = g.get_lookup (n_lookup); + printf (" Lookup %2d of %2d: type %d, props 0x%04X\n", n_lookup, num_lookups, + lookup.get_type (), lookup.get_props ()); + } + + } + break; + + case GDEF::tableTag: + { + + const GDEF &gdef = *reinterpret_cast<const GDEF *> (font_data + table.offset); + + printf (" Has %sglyph classes\n", + gdef.has_glyph_classes () ? "" : "no "); + printf (" Has %smark attachment types\n", + gdef.has_mark_attachment_types () ? "" : "no "); + printf (" Has %sattach list\n", + gdef.has_attach_list () ? "" : "no "); + printf (" Has %slig carets\n", + gdef.has_lig_carets () ? "" : "no "); + printf (" Has %smark glyph sets\n", + gdef.has_mark_glyph_sets () ? "" : "no "); + break; + } + } + } + } +} +/* end of private API use */ +#endif + +int +main (int argc, char **argv) +{ + if (argc != 2) + { + fprintf (stderr, "usage: %s font-file.ttf\n", argv[0]); + exit (1); + } + + hb_blob_t *blob = hb_blob_create_from_file_or_fail (argv[1]); + assert (blob); + printf ("Opened font file %s: %d bytes long\n", argv[1], hb_blob_get_length (blob)); +#ifndef MAIN_CC_NO_PRIVATE_API + print_layout_info_using_private_api (blob); +#endif +#if !defined(HB_NO_COLOR) && !defined(HB_NO_DRAW) + dump_glyphs (blob, argv[1]); +#endif + hb_blob_destroy (blob); + + return 0; +} |