262 lines
7.7 KiB
C++
262 lines
7.7 KiB
C++
/*
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* Copyright © 2018 Ebrahim Byagowi
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
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#include "hb-static.cc"
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#include "hb-ot-color-cbdt-table.hh"
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#include "hb-ot-color-colr-table.hh"
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#include "hb-ot-color-cpal-table.hh"
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#include "hb-ot-color-sbix-table.hh"
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#include "hb-ot-color-svg-table.hh"
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#include "hb-ft.h"
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_GLYPH_H
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#include <cairo.h>
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#include <cairo-ft.h>
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#include <cairo-svg.h>
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#ifdef HAVE_GLIB
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#include <glib.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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void cbdt_callback (const uint8_t* data, unsigned int length,
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unsigned int group, unsigned int gid)
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{
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char output_path[255];
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sprintf (output_path, "out/cbdt-%d-%d.png", group, gid);
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FILE *f = fopen (output_path, "wb");
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fwrite (data, 1, length, f);
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fclose (f);
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}
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void sbix_callback (const uint8_t* data, unsigned int length,
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unsigned int group, unsigned int gid)
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{
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char output_path[255];
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sprintf (output_path, "out/sbix-%d-%d.png", group, gid);
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FILE *f = fopen (output_path, "wb");
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fwrite (data, 1, length, f);
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fclose (f);
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}
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void svg_callback (const uint8_t* data, unsigned int length,
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unsigned int start_glyph, unsigned int end_glyph)
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{
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char output_path[255];
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if (start_glyph == end_glyph)
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sprintf (output_path, "out/svg-%d.svg", start_glyph);
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else
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sprintf (output_path, "out/svg-%d-%d.svg", start_glyph, end_glyph);
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// append "z" if the content is gzipped
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if ((data[0] == 0x1F) && (data[1] == 0x8B))
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strcat (output_path, "z");
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FILE *f = fopen (output_path, "wb");
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fwrite (data, 1, length, f);
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fclose (f);
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}
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void colr_cpal_rendering (cairo_font_face_t *cairo_face, unsigned int upem, unsigned int num_glyphs,
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const OT::COLR *colr, const OT::CPAL *cpal)
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{
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for (unsigned int i = 0; i < num_glyphs; ++i)
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{
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unsigned int first_layer_index, num_layers;
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if (colr->get_base_glyph_record (i, &first_layer_index, &num_layers))
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{
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// Measure
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cairo_text_extents_t extents;
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{
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cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1);
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cairo_t *cr = cairo_create (surface);
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cairo_set_font_face (cr, cairo_face);
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cairo_set_font_size (cr, upem);
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cairo_glyph_t *glyphs = (cairo_glyph_t *) calloc (num_layers, sizeof (cairo_glyph_t));
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for (unsigned int j = 0; j < num_layers; ++j)
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{
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hb_codepoint_t glyph_id;
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unsigned int color_index;
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colr->get_layer_record (first_layer_index + j, &glyph_id, &color_index);
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glyphs[j].index = glyph_id;
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}
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cairo_glyph_extents (cr, glyphs, num_layers, &extents);
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free (glyphs);
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cairo_surface_destroy (surface);
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cairo_destroy (cr);
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}
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// Add a slight margin
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extents.width += extents.width / 10;
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extents.height += extents.height / 10;
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extents.x_bearing -= extents.width / 20;
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extents.y_bearing -= extents.height / 20;
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// Render
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unsigned int pallet_count = cpal->get_palette_count ();
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for (unsigned int pallet = 0; pallet < pallet_count; ++pallet) {
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char output_path[255];
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// If we have more than one pallet, use a better namin
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if (pallet_count == 1)
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sprintf (output_path, "out/colr-%d.svg", i);
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else
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sprintf (output_path, "out/colr-%d-%d.svg", i, pallet);
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cairo_surface_t *surface = cairo_svg_surface_create (output_path, extents.width, extents.height);
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cairo_t *cr = cairo_create (surface);
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cairo_set_font_face (cr, cairo_face);
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cairo_set_font_size (cr, upem);
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for (unsigned int j = 0; j < num_layers; ++j)
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{
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hb_codepoint_t glyph_id;
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unsigned int color_index;
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colr->get_layer_record (first_layer_index + j, &glyph_id, &color_index);
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uint32_t color = cpal->get_color_record_argb (color_index, pallet);
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int alpha = color & 0xFF;
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int r = (color >> 8) & 0xFF;
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int g = (color >> 16) & 0xFF;
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int b = (color >> 24) & 0xFF;
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cairo_set_source_rgba (cr, r / 255.f, g / 255.f, b / 255.f, alpha);
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cairo_glyph_t glyph;
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glyph.index = glyph_id;
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glyph.x = -extents.x_bearing;
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glyph.y = -extents.y_bearing;
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cairo_show_glyphs (cr, &glyph, 1);
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}
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cairo_surface_destroy (surface);
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cairo_destroy (cr);
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}
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}
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}
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}
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void dump_glyphs (cairo_font_face_t *cairo_face, unsigned int upem, unsigned int num_glyphs)
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{
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// Dump every glyph available on the font
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return; // disabled for now
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for (unsigned int i = 0; i < num_glyphs; ++i)
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{
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cairo_text_extents_t extents;
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cairo_glyph_t glyph = {0};
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glyph.index = i;
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// Measure
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{
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cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1);
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cairo_t *cr = cairo_create (surface);
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cairo_set_font_face (cr, cairo_face);
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cairo_set_font_size (cr, upem);
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cairo_glyph_extents (cr, &glyph, 1, &extents);
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cairo_surface_destroy (surface);
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cairo_destroy (cr);
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}
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// Add a slight margin
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extents.width += extents.width / 10;
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extents.height += extents.height / 10;
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extents.x_bearing -= extents.width / 20;
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extents.y_bearing -= extents.height / 20;
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// Render
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{
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char output_path[255];
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sprintf (output_path, "out/%d.svg", i);
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cairo_surface_t *surface = cairo_svg_surface_create (output_path, extents.width, extents.height);
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cairo_t *cr = cairo_create (surface);
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cairo_set_font_face (cr, cairo_face);
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cairo_set_font_size (cr, upem);
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glyph.x = -extents.x_bearing;
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glyph.y = -extents.y_bearing;
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cairo_show_glyphs (cr, &glyph, 1);
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cairo_surface_destroy (surface);
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cairo_destroy (cr);
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}
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}
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}
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int main (int argc, char **argv)
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{
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if (argc != 2) {
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fprintf (stderr, "usage: %s font-file.ttf\n", argv[0]);
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exit (1);
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}
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hb_blob_t *blob = hb_blob_create_from_file (argv[1]);
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hb_face_t *face = hb_face_create (blob, 0);
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hb_font_t *font = hb_font_create (face);
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OT::CBDT::accelerator_t cbdt;
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cbdt.init (face);
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cbdt.dump (cbdt_callback);
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cbdt.fini ();
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OT::sbix::accelerator_t sbix;
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sbix.init (face);
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sbix.dump (sbix_callback);
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sbix.fini ();
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OT::SVG::accelerator_t svg;
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svg.init (face);
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svg.dump (svg_callback);
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svg.fini ();
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hb_blob_t* colr_blob = hb_sanitize_context_t ().reference_table<OT::COLR> (face);
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const OT::COLR *colr = colr_blob->as<OT::COLR> ();
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hb_blob_t* cpal_blob = hb_sanitize_context_t ().reference_table<OT::CPAL> (face);
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const OT::CPAL *cpal = cpal_blob->as<OT::CPAL> ();
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cairo_font_face_t *cairo_face;
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{
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FT_Library library;
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FT_Init_FreeType (&library);
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FT_Face ftface;
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FT_New_Face (library, argv[1], 0, &ftface);
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cairo_face = cairo_ft_font_face_create_for_ft_face (ftface, 0);
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}
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unsigned int num_glyphs = hb_face_get_glyph_count (face);
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unsigned int upem = hb_face_get_upem (face);
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colr_cpal_rendering (cairo_face, upem, num_glyphs, colr, cpal);
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dump_glyphs (cairo_face, upem, num_glyphs);
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hb_font_destroy (font);
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hb_face_destroy (face);
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hb_blob_destroy (blob);
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return 0;
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}
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