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kc3-lang/harfbuzz/src/main.cc
Ebrahim Byagowi
- src/main.cc
-
/* * 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 <stdlib.h> #include <stdio.h> #include <string.h> #ifdef HB_NO_OPEN #define hb_blob_create_from_file(x) hb_blob_get_empty () #endif #if !defined(HB_NO_COLOR) && !defined(HB_NO_DRAW) && defined(HB_EXPERIMENTAL_API) 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]; sprintf (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]; sprintf (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 user_data_t { FILE *f; hb_position_t ascender; }; static void move_to (hb_position_t to_x, hb_position_t to_y, user_data_t &user_data) { fprintf (user_data.f, "M%d,%d", to_x, user_data.ascender - to_y); } static void line_to (hb_position_t to_x, hb_position_t to_y, user_data_t &user_data) { fprintf (user_data.f, "L%d,%d", to_x, user_data.ascender - to_y); } static void quadratic_to (hb_position_t control_x, hb_position_t control_y, hb_position_t to_x, hb_position_t to_y, user_data_t &user_data) { fprintf (user_data.f, "Q%d,%d %d,%d", control_x, user_data.ascender - control_y, to_x, user_data.ascender - to_y); } static void cubic_to (hb_position_t control1_x, hb_position_t control1_y, hb_position_t control2_x, hb_position_t control2_y, hb_position_t to_x, hb_position_t to_y, user_data_t &user_data) { fprintf (user_data.f, "C%d,%d %d,%d %d,%d", control1_x, user_data.ascender - control1_y, control2_x, user_data.ascender - control2_y, to_x, user_data.ascender - to_y); } static void close_path (user_data_t &user_data) { fprintf (user_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]; sprintf (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); user_data_t user_data; user_data.ascender = extents.y_bearing; user_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=\""); if (!hb_font_draw_glyph (font, layers[layer].glyph, funcs, &user_data)) printf ("Failed to decompose layer %d while %d\n", layers[layer].glyph, gid); 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]; sprintf (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); user_data_t user_data; user_data.ascender = font_extents.ascender; user_data.f = f; if (!hb_font_draw_glyph (font, gid, funcs, &user_data)) printf ("Failed to decompose gid: %d\n", gid); 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); hb_draw_funcs_set_line_to_func (funcs, (hb_draw_line_to_func_t) line_to); hb_draw_funcs_set_quadratic_to_func (funcs, (hb_draw_quadratic_to_func_t) quadratic_to); hb_draw_funcs_set_cubic_to_func (funcs, (hb_draw_cubic_to_func_t) cubic_to); hb_draw_funcs_set_close_path_func (funcs, (hb_draw_close_path_func_t) close_path); 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 points\n", gdef.has_attach_points () ? "" : "no "); printf (" Has %slig carets\n", gdef.has_lig_carets () ? "" : "no "); printf (" Has %smark sets\n", gdef.has_mark_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 (argv[1]); 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) && defined(HB_EXPERIMENTAL_API) dump_glyphs (blob, argv[1]); #endif hb_blob_destroy (blob); return 0; }