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/*
* 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 <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#include <cairo.h>
#include <cairo-ft.h>
#include <cairo-svg.h>
#ifdef HAVE_GLIB
#include <glib.h>
#endif
#include <stdlib.h>
#include <stdio.h>
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<OT::COLR> (face);
const OT::COLR *colr = colr_blob->as<OT::COLR> ();
hb_blob_t* cpal_blob = hb_sanitize_context_t ().reference_table<OT::CPAL> (face);
const OT::CPAL *cpal = cpal_blob->as<OT::CPAL> ();
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;
}
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