/* * Copyright © 2018 Ebrahim Byagowi * * 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. */ #include "hb-static.cc" #include "hb-ot-color-cbdt-table.hh" #include "hb-ot-color-colr-table.hh" #include "hb-ot-color-cpal-table.hh" #include "hb-ot-color-sbix-table.hh" #include "hb-ot-color-svg-table.hh" #include "hb-ft.h" #include #include FT_FREETYPE_H #include FT_GLYPH_H #include #include #include #ifdef HAVE_GLIB #include #endif #include #include void cbdt_callback (const uint8_t* data, unsigned int length, unsigned int group, unsigned int gid) { char output_path[255]; sprintf (output_path, "out/cbdt-%d-%d.png", group, gid); FILE *f = fopen (output_path, "wb"); fwrite (data, 1, length, f); fclose (f); } void sbix_callback (const uint8_t* data, unsigned int length, unsigned int group, unsigned int gid) { char output_path[255]; sprintf (output_path, "out/sbix-%d-%d.png", group, gid); FILE *f = fopen (output_path, "wb"); fwrite (data, 1, length, f); fclose (f); } void svg_callback (const uint8_t* data, unsigned int length, unsigned int start_glyph, unsigned int end_glyph) { char output_path[255]; if (start_glyph == end_glyph) sprintf (output_path, "out/svg-%d.svg", start_glyph); else sprintf (output_path, "out/svg-%d-%d.svg", start_glyph, end_glyph); // append "z" if the content is gzipped if ((data[0] == 0x1F) && (data[1] == 0x8B)) strcat (output_path, "z"); FILE *f = fopen (output_path, "wb"); fwrite (data, 1, length, f); fclose (f); } void colr_cpal_rendering (cairo_font_face_t *cairo_face, unsigned int upem, unsigned int num_glyphs, const OT::COLR *colr, const OT::CPAL *cpal) { for (unsigned int i = 0; i < num_glyphs; ++i) { unsigned int first_layer_index, num_layers; if (colr->get_base_glyph_record (i, &first_layer_index, &num_layers)) { // Measure cairo_text_extents_t extents; { cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1); cairo_t *cr = cairo_create (surface); cairo_set_font_face (cr, cairo_face); cairo_set_font_size (cr, upem); cairo_glyph_t *glyphs = (cairo_glyph_t *) calloc (num_layers, sizeof (cairo_glyph_t)); for (unsigned int j = 0; j < num_layers; ++j) { hb_codepoint_t glyph_id; unsigned int color_index; colr->get_layer_record (first_layer_index + j, &glyph_id, &color_index); glyphs[j].index = glyph_id; } cairo_glyph_extents (cr, glyphs, num_layers, &extents); free (glyphs); cairo_surface_destroy (surface); cairo_destroy (cr); } // Add a slight margin extents.width += extents.width / 10; extents.height += extents.height / 10; extents.x_bearing -= extents.width / 20; extents.y_bearing -= extents.height / 20; // Render unsigned int pallet_count = cpal->get_palette_count (); for (unsigned int pallet = 0; pallet < pallet_count; ++pallet) { char output_path[255]; // If we have more than one pallet, use a better namin if (pallet_count == 1) sprintf (output_path, "out/colr-%d.svg", i); else sprintf (output_path, "out/colr-%d-%d.svg", i, pallet); cairo_surface_t *surface = cairo_svg_surface_create (output_path, extents.width, extents.height); cairo_t *cr = cairo_create (surface); cairo_set_font_face (cr, cairo_face); cairo_set_font_size (cr, upem); for (unsigned int j = 0; j < num_layers; ++j) { hb_codepoint_t glyph_id; unsigned int color_index; colr->get_layer_record (first_layer_index + j, &glyph_id, &color_index); uint32_t color = cpal->get_color_record_argb (color_index, pallet); int alpha = color & 0xFF; int r = (color >> 8) & 0xFF; int g = (color >> 16) & 0xFF; int b = (color >> 24) & 0xFF; cairo_set_source_rgba (cr, r / 255.f, g / 255.f, b / 255.f, alpha); cairo_glyph_t glyph; glyph.index = glyph_id; glyph.x = -extents.x_bearing; glyph.y = -extents.y_bearing; cairo_show_glyphs (cr, &glyph, 1); } cairo_surface_destroy (surface); cairo_destroy (cr); } } } } void dump_glyphs (cairo_font_face_t *cairo_face, unsigned int upem, unsigned int num_glyphs) { // Dump every glyph available on the font return; // disabled for now for (unsigned int i = 0; i < num_glyphs; ++i) { cairo_text_extents_t extents; cairo_glyph_t glyph = {0}; glyph.index = i; // Measure { cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1); cairo_t *cr = cairo_create (surface); cairo_set_font_face (cr, cairo_face); cairo_set_font_size (cr, upem); cairo_glyph_extents (cr, &glyph, 1, &extents); cairo_surface_destroy (surface); cairo_destroy (cr); } // Add a slight margin extents.width += extents.width / 10; extents.height += extents.height / 10; extents.x_bearing -= extents.width / 20; extents.y_bearing -= extents.height / 20; // Render { char output_path[255]; sprintf (output_path, "out/%d.svg", i); cairo_surface_t *surface = cairo_svg_surface_create (output_path, extents.width, extents.height); cairo_t *cr = cairo_create (surface); cairo_set_font_face (cr, cairo_face); cairo_set_font_size (cr, upem); glyph.x = -extents.x_bearing; glyph.y = -extents.y_bearing; cairo_show_glyphs (cr, &glyph, 1); cairo_surface_destroy (surface); cairo_destroy (cr); } } } 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]); hb_face_t *face = hb_face_create (blob, 0); hb_font_t *font = hb_font_create (face); OT::CBDT::accelerator_t cbdt; cbdt.init (face); cbdt.dump (cbdt_callback); cbdt.fini (); OT::sbix::accelerator_t sbix; sbix.init (face); sbix.dump (sbix_callback); sbix.fini (); OT::SVG::accelerator_t svg; svg.init (face); svg.dump (svg_callback); svg.fini (); hb_blob_t* colr_blob = hb_sanitize_context_t ().reference_table (face); const OT::COLR *colr = colr_blob->as (); hb_blob_t* cpal_blob = hb_sanitize_context_t ().reference_table (face); const OT::CPAL *cpal = cpal_blob->as (); cairo_font_face_t *cairo_face; { FT_Library library; FT_Init_FreeType (&library); FT_Face ftface; FT_New_Face (library, argv[1], 0, &ftface); cairo_face = cairo_ft_font_face_create_for_ft_face (ftface, 0); } unsigned int num_glyphs = hb_face_get_glyph_count (face); unsigned int upem = hb_face_get_upem (face); colr_cpal_rendering (cairo_face, upem, num_glyphs, colr, cpal); dump_glyphs (cairo_face, upem, num_glyphs); hb_font_destroy (font); hb_face_destroy (face); hb_blob_destroy (blob); return 0; }