/* * Copyright © 2009 Red Hat, Inc. * Copyright © 2012 Google, Inc. * * 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. * * Red Hat Author(s): Behdad Esfahbod * Google Author(s): Behdad Esfahbod */ #include "hb.hh" #include "hb-shaper.hh" #include "hb-shape-plan.hh" #include "hb-buffer.hh" #include "hb-font.hh" #include "hb-machinery.hh" /** * SECTION:hb-shape * @title: hb-shape * @short_description: Conversion of text strings into positioned glyphs * @include: hb.h * * Shaping is the central operation of HarfBuzz. Shaping operates on buffers, * which are sequences of Unicode characters that use the same font and have * the same text direction, script, and language. After shaping the buffer * contains the output glyphs and their positions. **/ #if HB_USE_ATEXIT static void free_static_shaper_list (); #endif static const char *nil_shaper_list[] = {nullptr}; static struct hb_shaper_list_lazy_loader_t : hb_lazy_loader_t<const char *, hb_shaper_list_lazy_loader_t> { static const char ** create () { const char **shaper_list = (const char **) calloc (1 + HB_SHAPERS_COUNT, sizeof (const char *)); if (unlikely (!shaper_list)) return nullptr; const hb_shaper_entry_t *shapers = _hb_shapers_get (); unsigned int i; for (i = 0; i < HB_SHAPERS_COUNT; i++) shaper_list[i] = shapers[i].name; shaper_list[i] = nullptr; #if HB_USE_ATEXIT atexit (free_static_shaper_list); #endif return shaper_list; } static void destroy (const char **l) { free (l); } static const char ** get_null () { return nil_shaper_list; } } static_shaper_list; #if HB_USE_ATEXIT static void free_static_shaper_list () { static_shaper_list.free_instance (); } #endif /** * hb_shape_list_shapers: * * Retrieves the list of shapers supported by HarfBuzz. * * Return value: (transfer none) (array zero-terminated=1): an array of * constant strings * * Since: 0.9.2 **/ const char ** hb_shape_list_shapers () { return static_shaper_list.get_unconst (); } /** * hb_shape_full: * @font: an #hb_font_t to use for shaping * @buffer: an #hb_buffer_t to shape * @features: (array length=num_features) (nullable): an array of user * specified #hb_feature_t or %NULL * @num_features: the length of @features array * @shaper_list: (array zero-terminated=1) (nullable): a %NULL-terminated * array of shapers to use or %NULL * * See hb_shape() for details. If @shaper_list is not %NULL, the specified * shapers will be used in the given order, otherwise the default shapers list * will be used. * * Return value: false if all shapers failed, true otherwise * * Since: 0.9.2 **/ hb_bool_t hb_shape_full (hb_font_t *font, hb_buffer_t *buffer, const hb_feature_t *features, unsigned int num_features, const char * const *shaper_list) { hb_shape_plan_t *shape_plan = hb_shape_plan_create_cached2 (font->face, &buffer->props, features, num_features, font->coords, font->num_coords, shaper_list); hb_bool_t res = hb_shape_plan_execute (shape_plan, font, buffer, features, num_features); hb_shape_plan_destroy (shape_plan); return res; } /** * hb_shape: * @font: an #hb_font_t to use for shaping * @buffer: an #hb_buffer_t to shape * @features: (array length=num_features) (nullable): an array of user * specified #hb_feature_t or %NULL * @num_features: the length of @features array * * Shapes @buffer using @font turning its Unicode characters content to * positioned glyphs. If @features is not %NULL, it will be used to control the * features applied during shaping. If two @features have the same tag but * overlapping ranges the value of the feature with the higher index takes * precedence. * * Since: 0.9.2 **/ void hb_shape (hb_font_t *font, hb_buffer_t *buffer, const hb_feature_t *features, unsigned int num_features) { hb_shape_full (font, buffer, features, num_features, nullptr); }