Behdad Esfahbod
4 years ago
parent
6edd50ae7f
commit
58c223357b
11 changed files with 457 additions and 389 deletions
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/*
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* Copyright © 2011 Google, Inc. |
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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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* Google Author(s): Behdad Esfahbod |
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*/ |
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#ifndef FACE_OPTIONS_HH |
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#define FACE_OPTIONS_HH |
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#include "options.hh" |
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struct face_options_t |
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{ |
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void add_options (option_parser_t *parser); |
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hb_blob_t *get_blob () const; |
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hb_face_t *get_face () const; |
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static struct cache_t |
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{ |
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~cache_t () |
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{ |
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free ((void *) font_path); |
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hb_blob_destroy (blob); |
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hb_face_destroy (face); |
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} |
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const char *font_path = nullptr; |
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hb_blob_t *blob = nullptr; |
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unsigned face_index = (unsigned) -1; |
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hb_face_t *face = nullptr; |
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} cache; |
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char *font_file = nullptr; |
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unsigned face_index = 0; |
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private: |
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mutable hb_face_t *face = nullptr; |
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}; |
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face_options_t::cache_t face_options_t::cache {}; |
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hb_blob_t * |
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face_options_t::get_blob () const |
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{ |
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// XXX This does the job for now; will move to post_parse.
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return cache.blob; |
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} |
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hb_face_t * |
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face_options_t::get_face () const |
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{ |
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if (face) |
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return face; |
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if (!font_file) |
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fail (true, "No font file set"); |
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const char *font_path = font_file; |
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if (0 == strcmp (font_path, "-")) |
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{ |
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#if defined(_WIN32) || defined(__CYGWIN__) |
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setmode (fileno (stdin), O_BINARY); |
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font_path = "STDIN"; |
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#else |
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font_path = "/dev/stdin"; |
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#endif |
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} |
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if (!cache.font_path || 0 != strcmp (cache.font_path, font_path)) |
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{ |
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hb_blob_destroy (cache.blob); |
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cache.blob = hb_blob_create_from_file_or_fail (font_path); |
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free ((char *) cache.font_path); |
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cache.font_path = strdup (font_path); |
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if (!cache.blob) |
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fail (false, "%s: Failed reading file", font_path); |
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hb_face_destroy (cache.face); |
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cache.face = nullptr; |
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cache.face_index = (unsigned) -1; |
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} |
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if (cache.face_index != face_index) |
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{ |
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hb_face_destroy (cache.face); |
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cache.face = hb_face_create (cache.blob, face_index); |
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cache.face_index = face_index; |
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} |
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face = cache.face; |
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return face; |
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} |
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void |
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face_options_t::add_options (option_parser_t *parser) |
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{ |
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GOptionEntry entries[] = |
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{ |
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{"font-file", 0, 0, G_OPTION_ARG_STRING, &this->font_file, "Set font file-name", "filename"}, |
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{"face-index", 0, 0, G_OPTION_ARG_INT, &this->face_index, "Set face index (default: 0)", "index"}, |
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{nullptr} |
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}; |
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parser->add_group (entries, |
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"face", |
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"Font-face options:", |
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"Options for the font face", |
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this); |
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} |
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#endif |
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@ -0,0 +1,306 @@ |
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/*
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* Copyright © 2011 Google, Inc. |
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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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* Google Author(s): Behdad Esfahbod |
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*/ |
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#ifndef FONT_OPTIONS_HH |
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#define FONT_OPTIONS_HH |
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#include "face-options.hh" |
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#ifdef HAVE_FREETYPE |
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#include <hb-ft.h> |
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#endif |
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#include <hb-ot.h> |
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#define FONT_SIZE_UPEM 0x7FFFFFFF |
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#define FONT_SIZE_NONE 0 |
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extern const unsigned DEFAULT_FONT_SIZE; |
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extern const unsigned SUBPIXEL_BITS; |
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struct font_options_t : face_options_t |
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{ |
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~font_options_t () |
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{ |
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g_free (font_file); |
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free (variations); |
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g_free (font_funcs); |
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hb_font_destroy (font); |
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} |
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void add_options (option_parser_t *parser); |
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hb_font_t *get_font () const; |
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hb_variation_t *variations = nullptr; |
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unsigned int num_variations = 0; |
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int x_ppem = 0; |
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int y_ppem = 0; |
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double ptem = 0.; |
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unsigned int subpixel_bits = SUBPIXEL_BITS; |
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mutable double font_size_x = DEFAULT_FONT_SIZE; |
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mutable double font_size_y = DEFAULT_FONT_SIZE; |
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char *font_funcs = nullptr; |
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int ft_load_flags = 2; |
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private: |
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mutable hb_font_t *font = nullptr; |
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}; |
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static struct supported_font_funcs_t { |
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char name[4]; |
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void (*func) (hb_font_t *); |
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} supported_font_funcs[] = |
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{ |
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#ifdef HAVE_FREETYPE |
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{"ft", hb_ft_font_set_funcs}, |
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#endif |
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{"ot", hb_ot_font_set_funcs}, |
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}; |
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hb_font_t * |
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font_options_t::get_font () const |
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{ |
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if (font) |
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return font; |
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auto *face = get_face (); |
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font = hb_font_create (face); |
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if (font_size_x == FONT_SIZE_UPEM) |
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font_size_x = hb_face_get_upem (face); |
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if (font_size_y == FONT_SIZE_UPEM) |
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font_size_y = hb_face_get_upem (face); |
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hb_font_set_ppem (font, x_ppem, y_ppem); |
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hb_font_set_ptem (font, ptem); |
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int scale_x = (int) scalbnf (font_size_x, subpixel_bits); |
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int scale_y = (int) scalbnf (font_size_y, subpixel_bits); |
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hb_font_set_scale (font, scale_x, scale_y); |
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hb_font_set_variations (font, variations, num_variations); |
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void (*set_font_funcs) (hb_font_t *) = nullptr; |
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if (!font_funcs) |
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{ |
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set_font_funcs = supported_font_funcs[0].func; |
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} |
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else |
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{ |
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for (unsigned int i = 0; i < ARRAY_LENGTH (supported_font_funcs); i++) |
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if (0 == g_ascii_strcasecmp (font_funcs, supported_font_funcs[i].name)) |
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{ |
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set_font_funcs = supported_font_funcs[i].func; |
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break; |
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} |
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if (!set_font_funcs) |
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{ |
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GString *s = g_string_new (nullptr); |
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for (unsigned int i = 0; i < ARRAY_LENGTH (supported_font_funcs); i++) |
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{ |
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if (i) |
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g_string_append_c (s, '/'); |
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g_string_append (s, supported_font_funcs[i].name); |
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} |
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char *p = g_string_free (s, FALSE); |
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fail (false, "Unknown font function implementation `%s'; supported values are: %s; default is %s", |
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font_funcs, |
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p, |
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supported_font_funcs[0].name); |
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//free (p);
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} |
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} |
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set_font_funcs (font); |
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#ifdef HAVE_FREETYPE |
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hb_ft_font_set_load_flags (font, ft_load_flags); |
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#endif |
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return font; |
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} |
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static gboolean |
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parse_variations (const char *name G_GNUC_UNUSED, |
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const char *arg, |
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gpointer data, |
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GError **error G_GNUC_UNUSED) |
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{ |
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font_options_t *font_opts = (font_options_t *) data; |
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char *s = (char *) arg; |
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char *p; |
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font_opts->num_variations = 0; |
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g_free (font_opts->variations); |
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font_opts->variations = nullptr; |
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if (!*s) |
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return true; |
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/* count the variations first, so we can allocate memory */ |
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p = s; |
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do { |
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font_opts->num_variations++; |
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p = strchr (p, ','); |
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if (p) |
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p++; |
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} while (p); |
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font_opts->variations = (hb_variation_t *) calloc (font_opts->num_variations, sizeof (*font_opts->variations)); |
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if (!font_opts->variations) |
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return false; |
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/* now do the actual parsing */ |
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p = s; |
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font_opts->num_variations = 0; |
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while (p && *p) { |
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char *end = strchr (p, ','); |
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if (hb_variation_from_string (p, end ? end - p : -1, &font_opts->variations[font_opts->num_variations])) |
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font_opts->num_variations++; |
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p = end ? end + 1 : nullptr; |
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} |
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return true; |
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} |
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static gboolean |
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parse_font_size (const char *name G_GNUC_UNUSED, |
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const char *arg, |
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gpointer data, |
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GError **error G_GNUC_UNUSED) |
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{ |
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font_options_t *font_opts = (font_options_t *) data; |
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if (0 == strcmp (arg, "upem")) |
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{ |
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font_opts->font_size_y = font_opts->font_size_x = FONT_SIZE_UPEM; |
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return true; |
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} |
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switch (sscanf (arg, "%lf%*[ ,]%lf", &font_opts->font_size_x, &font_opts->font_size_y)) { |
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case 1: font_opts->font_size_y = font_opts->font_size_x; HB_FALLTHROUGH; |
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case 2: return true; |
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default: |
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE, |
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"%s argument should be one or two space-separated numbers", |
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name); |
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return false; |
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} |
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} |
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static gboolean |
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parse_font_ppem (const char *name G_GNUC_UNUSED, |
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const char *arg, |
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gpointer data, |
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GError **error G_GNUC_UNUSED) |
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{ |
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font_options_t *font_opts = (font_options_t *) data; |
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switch (sscanf (arg, "%d%*[ ,]%d", &font_opts->x_ppem, &font_opts->y_ppem)) { |
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case 1: font_opts->y_ppem = font_opts->x_ppem; HB_FALLTHROUGH; |
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case 2: return true; |
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default: |
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE, |
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"%s argument should be one or two space-separated numbers", |
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name); |
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return false; |
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} |
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} |
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void |
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font_options_t::add_options (option_parser_t *parser) |
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{ |
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face_options_t::add_options (parser); |
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char *text = nullptr; |
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{ |
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static_assert ((ARRAY_LENGTH_CONST (supported_font_funcs) > 0), |
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"No supported font-funcs found."); |
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GString *s = g_string_new (nullptr); |
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g_string_printf (s, "Set font functions implementation to use (default: %s)\n\n Supported font function implementations are: %s", |
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supported_font_funcs[0].name, |
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supported_font_funcs[0].name); |
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for (unsigned int i = 1; i < ARRAY_LENGTH (supported_font_funcs); i++) |
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{ |
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g_string_append_c (s, '/'); |
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g_string_append (s, supported_font_funcs[i].name); |
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} |
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text = g_string_free (s, FALSE); |
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parser->free_later (text); |
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} |
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char *font_size_text; |
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if (DEFAULT_FONT_SIZE == FONT_SIZE_UPEM) |
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font_size_text = (char *) "Font size (default: upem)"; |
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else |
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{ |
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font_size_text = g_strdup_printf ("Font size (default: %d)", DEFAULT_FONT_SIZE); |
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parser->free_later (font_size_text); |
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} |
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int font_size_flags = DEFAULT_FONT_SIZE == FONT_SIZE_NONE ? G_OPTION_FLAG_HIDDEN : 0; |
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GOptionEntry entries[] = |
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{ |
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{"font-size", 0, font_size_flags, |
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G_OPTION_ARG_CALLBACK, (gpointer) &parse_font_size, font_size_text, "1/2 integers or 'upem'"}, |
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{"font-ppem", 0, font_size_flags, |
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G_OPTION_ARG_CALLBACK, (gpointer) &parse_font_ppem, "Set x,y pixels per EM (default: 0; disabled)", "1/2 integers"}, |
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{"font-ptem", 0, 0, |
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G_OPTION_ARG_DOUBLE, &this->ptem, "Set font point-size (default: 0; disabled)", "point-size"}, |
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{"font-funcs", 0, 0, G_OPTION_ARG_STRING, &this->font_funcs, text, "impl"}, |
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{"ft-load-flags", 0, 0, G_OPTION_ARG_INT, &this->ft_load_flags, "Set FreeType load-flags (default: 2)", "integer"}, |
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{nullptr} |
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}; |
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parser->add_group (entries, |
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"font", |
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"Font-instance options:", |
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"Options for the font instance", |
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this); |
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const gchar *variations_help = "Comma-separated list of font variations\n" |
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"\n" |
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" Variations are set globally. The format for specifying variation settings\n" |
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" follows. All valid CSS font-variation-settings values other than 'normal'\n" |
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" and 'inherited' are also accepted, though, not documented below.\n" |
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"\n" |
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" The format is a tag, optionally followed by an equals sign, followed by a\n" |
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" number. For example:\n" |
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"\n" |
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" \"wght=500\"\n" |
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" \"slnt=-7.5\"\n"; |
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GOptionEntry entries2[] = |
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{ |
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{"variations", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_variations, variations_help, "list"}, |
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{nullptr} |
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}; |
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parser->add_group (entries2, |
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"variations", |
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"Variations options:", |
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"Options for font variations used", |
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this); |
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} |
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#endif |
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