296 lines
8.5 KiB
C++
296 lines
8.5 KiB
C++
/*
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* Copyright © 2018 Ebrahim Byagowi
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* Copyright © 2018 Khaled Hosny
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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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static void
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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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static void
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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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static void
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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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static void
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colr_cpal_rendering (hb_face_t *face, cairo_font_face_t *cairo_face)
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{
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unsigned int upem = hb_face_get_upem (face);
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unsigned glyph_count = hb_face_get_glyph_count (face);
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for (hb_codepoint_t gid = 0; gid < glyph_count; ++gid)
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{
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unsigned int num_layers = hb_ot_color_glyph_get_layers (face, gid, 0, nullptr, nullptr);
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if (!num_layers)
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continue;
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hb_ot_color_layer_t *layers = (hb_ot_color_layer_t*) malloc (num_layers * sizeof (hb_ot_color_layer_t));
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hb_ot_color_glyph_get_layers (face, gid, 0, &num_layers, layers);
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if (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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glyphs[j].index = layers[j].glyph;
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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 palette_count = hb_ot_color_palette_get_count (face);
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for (unsigned int palette = 0; palette < palette_count; palette++) {
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char output_path[255];
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unsigned int num_colors = hb_ot_color_palette_get_colors (face, palette, 0, nullptr, nullptr);
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if (!num_colors)
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continue;
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hb_color_t *colors = (hb_color_t*) calloc (num_colors, sizeof (hb_color_t));
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hb_ot_color_palette_get_colors (face, palette, 0, &num_colors, colors);
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if (num_colors)
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{
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// If we have more than one palette, use a simpler naming
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if (palette_count == 1)
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sprintf (output_path, "out/colr-%d.svg", gid);
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else
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sprintf (output_path, "out/colr-%d-%d.svg", gid, palette);
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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 layer = 0; layer < num_layers; ++layer)
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{
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hb_color_t color = 0x000000FF;
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if (layers[layer].color_index != 0xFFFF)
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color = colors[layers[layer].color_index];
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cairo_set_source_rgba (cr,
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hb_color_get_red (color) / 255.,
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hb_color_get_green (color) / 255.,
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hb_color_get_blue (color) / 255.,
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hb_color_get_alpha (color) / 255.);
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cairo_glyph_t glyph;
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glyph.index = layers[layer].glyph;
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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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free (colors);
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}
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}
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free (layers);
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}
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}
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static void
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dump_glyphs (cairo_font_face_t *cairo_face, unsigned int upem,
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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
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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"
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"run it like `rm -rf out && mkdir out && %s font-file.ttf`\n",
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argv[0], argv[0]);
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exit (1);
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}
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FILE *font_name_file = fopen ("out/_font_name_file.txt", "r");
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if (font_name_file != nullptr)
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{
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fprintf (stderr, "Purge or move ./out folder in order to run a new dump\n");
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exit (1);
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}
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font_name_file = fopen ("out/_font_name_file.txt", "w");
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if (font_name_file == nullptr)
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{
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fprintf (stderr, "./out is not accessible as a folder, create it please\n");
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exit (1);
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}
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fwrite (argv[1], 1, strlen (argv[1]), font_name_file);
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fclose (font_name_file);
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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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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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colr_cpal_rendering (face, cairo_face);
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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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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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