/* * 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-font.hh" #include "hb-draw.hh" #include "hb-paint.hh" #include "hb-machinery.hh" #include "hb-ot.h" #include "hb-ot-var-avar-table.hh" #include "hb-ot-var-fvar-table.hh" /** * SECTION:hb-font * @title: hb-font * @short_description: Font objects * @include: hb.h * * Functions for working with font objects. * * A font object represents a font face at a specific size and with * certain other parameters (pixels-per-em, points-per-em, variation * settings) specified. Font objects are created from font face * objects, and are used as input to hb_shape(), among other things. * * Client programs can optionally pass in their own functions that * implement the basic, lower-level queries of font objects. This set * of font functions is defined by the virtual methods in * #hb_font_funcs_t. * * HarfBuzz provides a built-in set of lightweight default * functions for each method in #hb_font_funcs_t. **/ /* * hb_font_funcs_t */ static hb_bool_t hb_font_get_font_h_extents_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_font_extents_t *extents, void *user_data HB_UNUSED) { hb_memset (extents, 0, sizeof (*extents)); return false; } static hb_bool_t hb_font_get_font_h_extents_default (hb_font_t *font, void *font_data HB_UNUSED, hb_font_extents_t *extents, void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_font_h_extents (extents); if (ret) { extents->ascender = font->parent_scale_y_distance (extents->ascender); extents->descender = font->parent_scale_y_distance (extents->descender); extents->line_gap = font->parent_scale_y_distance (extents->line_gap); } return ret; } static hb_bool_t hb_font_get_font_v_extents_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_font_extents_t *extents, void *user_data HB_UNUSED) { hb_memset (extents, 0, sizeof (*extents)); return false; } static hb_bool_t hb_font_get_font_v_extents_default (hb_font_t *font, void *font_data HB_UNUSED, hb_font_extents_t *extents, void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_font_v_extents (extents); if (ret) { extents->ascender = font->parent_scale_x_distance (extents->ascender); extents->descender = font->parent_scale_x_distance (extents->descender); extents->line_gap = font->parent_scale_x_distance (extents->line_gap); } return ret; } static hb_bool_t hb_font_get_nominal_glyph_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t unicode HB_UNUSED, hb_codepoint_t *glyph, void *user_data HB_UNUSED) { *glyph = 0; return false; } static hb_bool_t hb_font_get_nominal_glyph_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t unicode, hb_codepoint_t *glyph, void *user_data HB_UNUSED) { if (font->has_nominal_glyphs_func_set ()) { return font->get_nominal_glyphs (1, &unicode, 0, glyph, 0); } return font->parent->get_nominal_glyph (unicode, glyph); } #define hb_font_get_nominal_glyphs_nil hb_font_get_nominal_glyphs_default static unsigned int hb_font_get_nominal_glyphs_default (hb_font_t *font, void *font_data HB_UNUSED, unsigned int count, const hb_codepoint_t *first_unicode, unsigned int unicode_stride, hb_codepoint_t *first_glyph, unsigned int glyph_stride, void *user_data HB_UNUSED) { if (font->has_nominal_glyph_func_set ()) { for (unsigned int i = 0; i < count; i++) { if (!font->get_nominal_glyph (*first_unicode, first_glyph)) return i; first_unicode = &StructAtOffsetUnaligned (first_unicode, unicode_stride); first_glyph = &StructAtOffsetUnaligned (first_glyph, glyph_stride); } return count; } return font->parent->get_nominal_glyphs (count, first_unicode, unicode_stride, first_glyph, glyph_stride); } static hb_bool_t hb_font_get_variation_glyph_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t unicode HB_UNUSED, hb_codepoint_t variation_selector HB_UNUSED, hb_codepoint_t *glyph, void *user_data HB_UNUSED) { *glyph = 0; return false; } static hb_bool_t hb_font_get_variation_glyph_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t unicode, hb_codepoint_t variation_selector, hb_codepoint_t *glyph, void *user_data HB_UNUSED) { return font->parent->get_variation_glyph (unicode, variation_selector, glyph); } static hb_position_t hb_font_get_glyph_h_advance_nil (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph HB_UNUSED, void *user_data HB_UNUSED) { return font->x_scale; } static hb_position_t hb_font_get_glyph_h_advance_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, void *user_data HB_UNUSED) { if (font->has_glyph_h_advances_func_set ()) { hb_position_t ret; font->get_glyph_h_advances (1, &glyph, 0, &ret, 0); return ret; } return font->parent_scale_x_distance (font->parent->get_glyph_h_advance (glyph)); } static hb_position_t hb_font_get_glyph_v_advance_nil (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph HB_UNUSED, void *user_data HB_UNUSED) { /* TODO use font_extents.ascender+descender */ return font->y_scale; } static hb_position_t hb_font_get_glyph_v_advance_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, void *user_data HB_UNUSED) { if (font->has_glyph_v_advances_func_set ()) { hb_position_t ret; font->get_glyph_v_advances (1, &glyph, 0, &ret, 0); return ret; } return font->parent_scale_y_distance (font->parent->get_glyph_v_advance (glyph)); } #define hb_font_get_glyph_h_advances_nil hb_font_get_glyph_h_advances_default static void hb_font_get_glyph_h_advances_default (hb_font_t* font, void* font_data HB_UNUSED, unsigned int count, const hb_codepoint_t *first_glyph, unsigned int glyph_stride, hb_position_t *first_advance, unsigned int advance_stride, void *user_data HB_UNUSED) { if (font->has_glyph_h_advance_func_set ()) { for (unsigned int i = 0; i < count; i++) { *first_advance = font->get_glyph_h_advance (*first_glyph); first_glyph = &StructAtOffsetUnaligned (first_glyph, glyph_stride); first_advance = &StructAtOffsetUnaligned (first_advance, advance_stride); } return; } font->parent->get_glyph_h_advances (count, first_glyph, glyph_stride, first_advance, advance_stride); for (unsigned int i = 0; i < count; i++) { *first_advance = font->parent_scale_x_distance (*first_advance); first_advance = &StructAtOffsetUnaligned (first_advance, advance_stride); } } #define hb_font_get_glyph_v_advances_nil hb_font_get_glyph_v_advances_default static void hb_font_get_glyph_v_advances_default (hb_font_t* font, void* font_data HB_UNUSED, unsigned int count, const hb_codepoint_t *first_glyph, unsigned int glyph_stride, hb_position_t *first_advance, unsigned int advance_stride, void *user_data HB_UNUSED) { if (font->has_glyph_v_advance_func_set ()) { for (unsigned int i = 0; i < count; i++) { *first_advance = font->get_glyph_v_advance (*first_glyph); first_glyph = &StructAtOffsetUnaligned (first_glyph, glyph_stride); first_advance = &StructAtOffsetUnaligned (first_advance, advance_stride); } return; } font->parent->get_glyph_v_advances (count, first_glyph, glyph_stride, first_advance, advance_stride); for (unsigned int i = 0; i < count; i++) { *first_advance = font->parent_scale_y_distance (*first_advance); first_advance = &StructAtOffsetUnaligned (first_advance, advance_stride); } } static hb_bool_t hb_font_get_glyph_h_origin_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph HB_UNUSED, hb_position_t *x, hb_position_t *y, void *user_data HB_UNUSED) { *x = *y = 0; return true; } static hb_bool_t hb_font_get_glyph_h_origin_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y, void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_glyph_h_origin (glyph, x, y); if (ret) font->parent_scale_position (x, y); return ret; } static hb_bool_t hb_font_get_glyph_v_origin_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph HB_UNUSED, hb_position_t *x, hb_position_t *y, void *user_data HB_UNUSED) { *x = *y = 0; return false; } static hb_bool_t hb_font_get_glyph_v_origin_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y, void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_glyph_v_origin (glyph, x, y); if (ret) font->parent_scale_position (x, y); return ret; } static hb_position_t hb_font_get_glyph_h_kerning_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t left_glyph HB_UNUSED, hb_codepoint_t right_glyph HB_UNUSED, void *user_data HB_UNUSED) { return 0; } static hb_position_t hb_font_get_glyph_h_kerning_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t left_glyph, hb_codepoint_t right_glyph, void *user_data HB_UNUSED) { return font->parent_scale_x_distance (font->parent->get_glyph_h_kerning (left_glyph, right_glyph)); } #ifndef HB_DISABLE_DEPRECATED static hb_position_t hb_font_get_glyph_v_kerning_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t top_glyph HB_UNUSED, hb_codepoint_t bottom_glyph HB_UNUSED, void *user_data HB_UNUSED) { return 0; } static hb_position_t hb_font_get_glyph_v_kerning_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t top_glyph, hb_codepoint_t bottom_glyph, void *user_data HB_UNUSED) { return font->parent_scale_y_distance (font->parent->get_glyph_v_kerning (top_glyph, bottom_glyph)); } #endif static hb_bool_t hb_font_get_glyph_extents_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph HB_UNUSED, hb_glyph_extents_t *extents, void *user_data HB_UNUSED) { hb_memset (extents, 0, sizeof (*extents)); return false; } static hb_bool_t hb_font_get_glyph_extents_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, hb_glyph_extents_t *extents, void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_glyph_extents (glyph, extents); if (ret) { font->parent_scale_position (&extents->x_bearing, &extents->y_bearing); font->parent_scale_distance (&extents->width, &extents->height); } return ret; } static hb_bool_t hb_font_get_glyph_contour_point_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph HB_UNUSED, unsigned int point_index HB_UNUSED, hb_position_t *x, hb_position_t *y, void *user_data HB_UNUSED) { *x = *y = 0; return false; } static hb_bool_t hb_font_get_glyph_contour_point_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, unsigned int point_index, hb_position_t *x, hb_position_t *y, void *user_data HB_UNUSED) { hb_bool_t ret = font->parent->get_glyph_contour_point (glyph, point_index, x, y); if (ret) font->parent_scale_position (x, y); return ret; } static hb_bool_t hb_font_get_glyph_name_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph HB_UNUSED, char *name, unsigned int size, void *user_data HB_UNUSED) { if (size) *name = '\0'; return false; } static hb_bool_t hb_font_get_glyph_name_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, char *name, unsigned int size, void *user_data HB_UNUSED) { return font->parent->get_glyph_name (glyph, name, size); } static hb_bool_t hb_font_get_glyph_from_name_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, const char *name HB_UNUSED, int len HB_UNUSED, /* -1 means nul-terminated */ hb_codepoint_t *glyph, void *user_data HB_UNUSED) { *glyph = 0; return false; } static hb_bool_t hb_font_get_glyph_from_name_default (hb_font_t *font, void *font_data HB_UNUSED, const char *name, int len, /* -1 means nul-terminated */ hb_codepoint_t *glyph, void *user_data HB_UNUSED) { return font->parent->get_glyph_from_name (name, len, glyph); } static void hb_font_draw_glyph_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph, hb_draw_funcs_t *draw_funcs, void *draw_data, void *user_data HB_UNUSED) { } static void hb_font_paint_glyph_nil (hb_font_t *font HB_UNUSED, void *font_data HB_UNUSED, hb_codepoint_t glyph HB_UNUSED, hb_paint_funcs_t *paint_funcs HB_UNUSED, void *paint_data HB_UNUSED, unsigned int palette HB_UNUSED, hb_color_t foreground HB_UNUSED, void *user_data HB_UNUSED) { } typedef struct hb_font_draw_glyph_default_adaptor_t { hb_draw_funcs_t *draw_funcs; void *draw_data; float x_scale; float y_scale; float slant; } hb_font_draw_glyph_default_adaptor_t; static void hb_draw_move_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data, hb_draw_state_t *st, float to_x, float to_y, void *user_data HB_UNUSED) { hb_font_draw_glyph_default_adaptor_t *adaptor = (hb_font_draw_glyph_default_adaptor_t *) draw_data; float x_scale = adaptor->x_scale; float y_scale = adaptor->y_scale; float slant = adaptor->slant; adaptor->draw_funcs->emit_move_to (adaptor->draw_data, *st, x_scale * to_x + slant * to_y, y_scale * to_y); } static void hb_draw_line_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data, hb_draw_state_t *st, float to_x, float to_y, void *user_data HB_UNUSED) { hb_font_draw_glyph_default_adaptor_t *adaptor = (hb_font_draw_glyph_default_adaptor_t *) draw_data; float x_scale = adaptor->x_scale; float y_scale = adaptor->y_scale; float slant = adaptor->slant; st->current_x = st->current_x * x_scale + st->current_y * slant; st->current_y = st->current_y * y_scale; adaptor->draw_funcs->emit_line_to (adaptor->draw_data, *st, x_scale * to_x + slant * to_y, y_scale * to_y); } static void hb_draw_quadratic_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data, hb_draw_state_t *st, float control_x, float control_y, float to_x, float to_y, void *user_data HB_UNUSED) { hb_font_draw_glyph_default_adaptor_t *adaptor = (hb_font_draw_glyph_default_adaptor_t *) draw_data; float x_scale = adaptor->x_scale; float y_scale = adaptor->y_scale; float slant = adaptor->slant; st->current_x = st->current_x * x_scale + st->current_y * slant; st->current_y = st->current_y * y_scale; adaptor->draw_funcs->emit_quadratic_to (adaptor->draw_data, *st, x_scale * control_x + slant * control_y, y_scale * control_y, x_scale * to_x + slant * to_y, y_scale * to_y); } static void hb_draw_cubic_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data, hb_draw_state_t *st, float control1_x, float control1_y, float control2_x, float control2_y, float to_x, float to_y, void *user_data HB_UNUSED) { hb_font_draw_glyph_default_adaptor_t *adaptor = (hb_font_draw_glyph_default_adaptor_t *) draw_data; float x_scale = adaptor->x_scale; float y_scale = adaptor->y_scale; float slant = adaptor->slant; st->current_x = st->current_x * x_scale + st->current_y * slant; st->current_y = st->current_y * y_scale; adaptor->draw_funcs->emit_cubic_to (adaptor->draw_data, *st, x_scale * control1_x + slant * control1_y, y_scale * control1_y, x_scale * control2_x + slant * control2_y, y_scale * control2_y, x_scale * to_x + slant * to_y, y_scale * to_y); } static void hb_draw_close_path_default (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data, hb_draw_state_t *st, void *user_data HB_UNUSED) { hb_font_draw_glyph_default_adaptor_t *adaptor = (hb_font_draw_glyph_default_adaptor_t *) draw_data; adaptor->draw_funcs->emit_close_path (adaptor->draw_data, *st); } static const hb_draw_funcs_t _hb_draw_funcs_default = { HB_OBJECT_HEADER_STATIC, { #define HB_DRAW_FUNC_IMPLEMENT(name) hb_draw_##name##_default, HB_DRAW_FUNCS_IMPLEMENT_CALLBACKS #undef HB_DRAW_FUNC_IMPLEMENT } }; static void hb_font_draw_glyph_default (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, hb_draw_funcs_t *draw_funcs, void *draw_data, void *user_data HB_UNUSED) { hb_font_draw_glyph_default_adaptor_t adaptor = { draw_funcs, draw_data, font->parent->x_scale ? (float) font->x_scale / (float) font->parent->x_scale : 0.f, font->parent->y_scale ? (float) font->y_scale / (float) font->parent->y_scale : 0.f, font->parent->y_scale ? (font->slant - font->parent->slant) * (float) font->x_scale / (float) font->parent->y_scale : 0.f }; font->parent->draw_glyph (glyph, const_cast (&_hb_draw_funcs_default), &adaptor); } static void hb_font_paint_glyph_default (hb_font_t *font, void *font_data, hb_codepoint_t glyph, hb_paint_funcs_t *paint_funcs, void *paint_data, unsigned int palette, hb_color_t foreground, void *user_data) { paint_funcs->push_transform (paint_data, font->parent->x_scale ? (float) font->x_scale / (float) font->parent->x_scale : 0.f, font->parent->y_scale ? (font->slant - font->parent->slant) * (float) font->x_scale / (float) font->parent->y_scale : 0.f, 0.f, font->parent->y_scale ? (float) font->y_scale / (float) font->parent->y_scale : 0.f, 0.f, 0.f); font->parent->paint_glyph (glyph, paint_funcs, paint_data, palette, foreground); paint_funcs->pop_transform (paint_data); } DEFINE_NULL_INSTANCE (hb_font_funcs_t) = { HB_OBJECT_HEADER_STATIC, nullptr, nullptr, { { #define HB_FONT_FUNC_IMPLEMENT(get_,name) hb_font_##get_##name##_nil, HB_FONT_FUNCS_IMPLEMENT_CALLBACKS #undef HB_FONT_FUNC_IMPLEMENT } } }; static const hb_font_funcs_t _hb_font_funcs_default = { HB_OBJECT_HEADER_STATIC, nullptr, nullptr, { { #define HB_FONT_FUNC_IMPLEMENT(get_,name) hb_font_##get_##name##_default, HB_FONT_FUNCS_IMPLEMENT_CALLBACKS #undef HB_FONT_FUNC_IMPLEMENT } } }; /** * hb_font_funcs_create: * * Creates a new #hb_font_funcs_t structure of font functions. * * Return value: (transfer full): The font-functions structure * * Since: 0.9.2 **/ hb_font_funcs_t * hb_font_funcs_create () { hb_font_funcs_t *ffuncs; if (!(ffuncs = hb_object_create ())) return hb_font_funcs_get_empty (); ffuncs->get = _hb_font_funcs_default.get; return ffuncs; } /** * hb_font_funcs_get_empty: * * Fetches an empty font-functions structure. * * Return value: (transfer full): The font-functions structure * * Since: 0.9.2 **/ hb_font_funcs_t * hb_font_funcs_get_empty () { return const_cast (&_hb_font_funcs_default); } /** * hb_font_funcs_reference: (skip) * @ffuncs: The font-functions structure * * Increases the reference count on a font-functions structure. * * Return value: The font-functions structure * * Since: 0.9.2 **/ hb_font_funcs_t * hb_font_funcs_reference (hb_font_funcs_t *ffuncs) { return hb_object_reference (ffuncs); } /** * hb_font_funcs_destroy: (skip) * @ffuncs: The font-functions structure * * Decreases the reference count on a font-functions structure. When * the reference count reaches zero, the font-functions structure is * destroyed, freeing all memory. * * Since: 0.9.2 **/ void hb_font_funcs_destroy (hb_font_funcs_t *ffuncs) { if (!hb_object_destroy (ffuncs)) return; if (ffuncs->destroy) { #define HB_FONT_FUNC_IMPLEMENT(get_,name) if (ffuncs->destroy->name) \ ffuncs->destroy->name (!ffuncs->user_data ? nullptr : ffuncs->user_data->name); HB_FONT_FUNCS_IMPLEMENT_CALLBACKS #undef HB_FONT_FUNC_IMPLEMENT } hb_free (ffuncs->destroy); hb_free (ffuncs->user_data); hb_free (ffuncs); } /** * hb_font_funcs_set_user_data: (skip) * @ffuncs: The font-functions structure * @key: The user-data key to set * @data: A pointer to the user data set * @destroy: (nullable): A callback to call when @data is not needed anymore * @replace: Whether to replace an existing data with the same key * * Attaches a user-data key/data pair to the specified font-functions structure. * * Return value: `true` if success, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_funcs_set_user_data (hb_font_funcs_t *ffuncs, hb_user_data_key_t *key, void * data, hb_destroy_func_t destroy /* May be NULL. */, hb_bool_t replace) { return hb_object_set_user_data (ffuncs, key, data, destroy, replace); } /** * hb_font_funcs_get_user_data: (skip) * @ffuncs: The font-functions structure * @key: The user-data key to query * * Fetches the user data associated with the specified key, * attached to the specified font-functions structure. * * Return value: (transfer none): A pointer to the user data * * Since: 0.9.2 **/ void * hb_font_funcs_get_user_data (const hb_font_funcs_t *ffuncs, hb_user_data_key_t *key) { return hb_object_get_user_data (ffuncs, key); } /** * hb_font_funcs_make_immutable: * @ffuncs: The font-functions structure * * Makes a font-functions structure immutable. * * Since: 0.9.2 **/ void hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs) { if (hb_object_is_immutable (ffuncs)) return; hb_object_make_immutable (ffuncs); } /** * hb_font_funcs_is_immutable: * @ffuncs: The font-functions structure * * Tests whether a font-functions structure is immutable. * * Return value: `true` if @ffuncs is immutable, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs) { return hb_object_is_immutable (ffuncs); } static bool _hb_font_funcs_set_preamble (hb_font_funcs_t *ffuncs, bool func_is_null, void **user_data, hb_destroy_func_t *destroy) { if (hb_object_is_immutable (ffuncs)) { if (*destroy) (*destroy) (*user_data); return false; } if (func_is_null) { if (*destroy) (*destroy) (*user_data); *destroy = nullptr; *user_data = nullptr; } return true; } static bool _hb_font_funcs_set_middle (hb_font_funcs_t *ffuncs, void *user_data, hb_destroy_func_t destroy) { if (user_data && !ffuncs->user_data) { ffuncs->user_data = (decltype (ffuncs->user_data)) hb_calloc (1, sizeof (*ffuncs->user_data)); if (unlikely (!ffuncs->user_data)) goto fail; } if (destroy && !ffuncs->destroy) { ffuncs->destroy = (decltype (ffuncs->destroy)) hb_calloc (1, sizeof (*ffuncs->destroy)); if (unlikely (!ffuncs->destroy)) goto fail; } return true; fail: if (destroy) (destroy) (user_data); return false; } #define HB_FONT_FUNC_IMPLEMENT(get_,name) \ \ void \ hb_font_funcs_set_##name##_func (hb_font_funcs_t *ffuncs, \ hb_font_##get_##name##_func_t func, \ void *user_data, \ hb_destroy_func_t destroy) \ { \ if (!_hb_font_funcs_set_preamble (ffuncs, !func, &user_data, &destroy))\ return; \ \ if (ffuncs->destroy && ffuncs->destroy->name) \ ffuncs->destroy->name (!ffuncs->user_data ? nullptr : ffuncs->user_data->name); \ \ if (!_hb_font_funcs_set_middle (ffuncs, user_data, destroy)) \ return; \ \ if (func) \ ffuncs->get.f.name = func; \ else \ ffuncs->get.f.name = hb_font_##get_##name##_default; \ \ if (ffuncs->user_data) \ ffuncs->user_data->name = user_data; \ if (ffuncs->destroy) \ ffuncs->destroy->name = destroy; \ } HB_FONT_FUNCS_IMPLEMENT_CALLBACKS #undef HB_FONT_FUNC_IMPLEMENT bool hb_font_t::has_func_set (unsigned int i) { return this->klass->get.array[i] != _hb_font_funcs_default.get.array[i]; } bool hb_font_t::has_func (unsigned int i) { return has_func_set (i) || (parent && parent != &_hb_Null_hb_font_t && parent->has_func (i)); } /* Public getters */ /** * hb_font_get_h_extents: * @font: #hb_font_t to work upon * @extents: (out): The font extents retrieved * * Fetches the extents for a specified font, for horizontal * text segments. * * Return value: `true` if data found, `false` otherwise * * Since: 1.1.3 **/ hb_bool_t hb_font_get_h_extents (hb_font_t *font, hb_font_extents_t *extents) { return font->get_font_h_extents (extents); } /** * hb_font_get_v_extents: * @font: #hb_font_t to work upon * @extents: (out): The font extents retrieved * * Fetches the extents for a specified font, for vertical * text segments. * * Return value: `true` if data found, `false` otherwise * * Since: 1.1.3 **/ hb_bool_t hb_font_get_v_extents (hb_font_t *font, hb_font_extents_t *extents) { return font->get_font_v_extents (extents); } /** * hb_font_get_glyph: * @font: #hb_font_t to work upon * @unicode: The Unicode code point to query * @variation_selector: A variation-selector code point * @glyph: (out): The glyph ID retrieved * * Fetches the glyph ID for a Unicode code point in the specified * font, with an optional variation selector. * * If @variation_selector is 0, calls hb_font_get_nominal_glyph(); * otherwise calls hb_font_get_variation_glyph(). * * Return value: `true` if data found, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_get_glyph (hb_font_t *font, hb_codepoint_t unicode, hb_codepoint_t variation_selector, hb_codepoint_t *glyph) { if (unlikely (variation_selector)) return font->get_variation_glyph (unicode, variation_selector, glyph); return font->get_nominal_glyph (unicode, glyph); } /** * hb_font_get_nominal_glyph: * @font: #hb_font_t to work upon * @unicode: The Unicode code point to query * @glyph: (out): The glyph ID retrieved * * Fetches the nominal glyph ID for a Unicode code point in the * specified font. * * This version of the function should not be used to fetch glyph IDs * for code points modified by variation selectors. For variation-selector * support, user hb_font_get_variation_glyph() or use hb_font_get_glyph(). * * Return value: `true` if data found, `false` otherwise * * Since: 1.2.3 **/ hb_bool_t hb_font_get_nominal_glyph (hb_font_t *font, hb_codepoint_t unicode, hb_codepoint_t *glyph) { return font->get_nominal_glyph (unicode, glyph); } /** * hb_font_get_nominal_glyphs: * @font: #hb_font_t to work upon * @count: number of code points to query * @first_unicode: The first Unicode code point to query * @unicode_stride: The stride between successive code points * @first_glyph: (out): The first glyph ID retrieved * @glyph_stride: The stride between successive glyph IDs * * Fetches the nominal glyph IDs for a sequence of Unicode code points. Glyph * IDs must be returned in a #hb_codepoint_t output parameter. Stopes at the * first unsupported glyph ID. * * Return value: the number of code points processed * * Since: 2.6.3 **/ unsigned int hb_font_get_nominal_glyphs (hb_font_t *font, unsigned int count, const hb_codepoint_t *first_unicode, unsigned int unicode_stride, hb_codepoint_t *first_glyph, unsigned int glyph_stride) { return font->get_nominal_glyphs (count, first_unicode, unicode_stride, first_glyph, glyph_stride); } /** * hb_font_get_variation_glyph: * @font: #hb_font_t to work upon * @unicode: The Unicode code point to query * @variation_selector: The variation-selector code point to query * @glyph: (out): The glyph ID retrieved * * Fetches the glyph ID for a Unicode code point when followed by * by the specified variation-selector code point, in the specified * font. * * Return value: `true` if data found, `false` otherwise * * Since: 1.2.3 **/ hb_bool_t hb_font_get_variation_glyph (hb_font_t *font, hb_codepoint_t unicode, hb_codepoint_t variation_selector, hb_codepoint_t *glyph) { return font->get_variation_glyph (unicode, variation_selector, glyph); } /** * hb_font_get_glyph_h_advance: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * * Fetches the advance for a glyph ID in the specified font, * for horizontal text segments. * * Return value: The advance of @glyph within @font * * Since: 0.9.2 **/ hb_position_t hb_font_get_glyph_h_advance (hb_font_t *font, hb_codepoint_t glyph) { return font->get_glyph_h_advance (glyph); } /** * hb_font_get_glyph_v_advance: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * * Fetches the advance for a glyph ID in the specified font, * for vertical text segments. * * Return value: The advance of @glyph within @font * * Since: 0.9.2 **/ hb_position_t hb_font_get_glyph_v_advance (hb_font_t *font, hb_codepoint_t glyph) { return font->get_glyph_v_advance (glyph); } /** * hb_font_get_glyph_h_advances: * @font: #hb_font_t to work upon * @count: The number of glyph IDs in the sequence queried * @first_glyph: The first glyph ID to query * @glyph_stride: The stride between successive glyph IDs * @first_advance: (out): The first advance retrieved * @advance_stride: The stride between successive advances * * Fetches the advances for a sequence of glyph IDs in the specified * font, for horizontal text segments. * * Since: 1.8.6 **/ void hb_font_get_glyph_h_advances (hb_font_t* font, unsigned int count, const hb_codepoint_t *first_glyph, unsigned glyph_stride, hb_position_t *first_advance, unsigned advance_stride) { font->get_glyph_h_advances (count, first_glyph, glyph_stride, first_advance, advance_stride); } /** * hb_font_get_glyph_v_advances: * @font: #hb_font_t to work upon * @count: The number of glyph IDs in the sequence queried * @first_glyph: The first glyph ID to query * @glyph_stride: The stride between successive glyph IDs * @first_advance: (out): The first advance retrieved * @advance_stride: (out): The stride between successive advances * * Fetches the advances for a sequence of glyph IDs in the specified * font, for vertical text segments. * * Since: 1.8.6 **/ void hb_font_get_glyph_v_advances (hb_font_t* font, unsigned int count, const hb_codepoint_t *first_glyph, unsigned glyph_stride, hb_position_t *first_advance, unsigned advance_stride) { font->get_glyph_v_advances (count, first_glyph, glyph_stride, first_advance, advance_stride); } /** * hb_font_get_glyph_h_origin: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @x: (out): The X coordinate of the origin * @y: (out): The Y coordinate of the origin * * Fetches the (X,Y) coordinates of the origin for a glyph ID * in the specified font, for horizontal text segments. * * Return value: `true` if data found, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_get_glyph_h_origin (hb_font_t *font, hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y) { return font->get_glyph_h_origin (glyph, x, y); } /** * hb_font_get_glyph_v_origin: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @x: (out): The X coordinate of the origin * @y: (out): The Y coordinate of the origin * * Fetches the (X,Y) coordinates of the origin for a glyph ID * in the specified font, for vertical text segments. * * Return value: `true` if data found, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_get_glyph_v_origin (hb_font_t *font, hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y) { return font->get_glyph_v_origin (glyph, x, y); } /** * hb_font_get_glyph_h_kerning: * @font: #hb_font_t to work upon * @left_glyph: The glyph ID of the left glyph in the glyph pair * @right_glyph: The glyph ID of the right glyph in the glyph pair * * Fetches the kerning-adjustment value for a glyph-pair in * the specified font, for horizontal text segments. * * It handles legacy kerning only (as returned by the corresponding * #hb_font_funcs_t function). * * Return value: The kerning adjustment value * * Since: 0.9.2 **/ hb_position_t hb_font_get_glyph_h_kerning (hb_font_t *font, hb_codepoint_t left_glyph, hb_codepoint_t right_glyph) { return font->get_glyph_h_kerning (left_glyph, right_glyph); } #ifndef HB_DISABLE_DEPRECATED /** * hb_font_get_glyph_v_kerning: * @font: #hb_font_t to work upon * @top_glyph: The glyph ID of the top glyph in the glyph pair * @bottom_glyph: The glyph ID of the bottom glyph in the glyph pair * * Fetches the kerning-adjustment value for a glyph-pair in * the specified font, for vertical text segments. * * It handles legacy kerning only (as returned by the corresponding * #hb_font_funcs_t function). * * Return value: The kerning adjustment value * * Since: 0.9.2 * Deprecated: 2.0.0 **/ hb_position_t hb_font_get_glyph_v_kerning (hb_font_t *font, hb_codepoint_t top_glyph, hb_codepoint_t bottom_glyph) { return font->get_glyph_v_kerning (top_glyph, bottom_glyph); } #endif /** * hb_font_get_glyph_extents: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @extents: (out): The #hb_glyph_extents_t retrieved * * Fetches the #hb_glyph_extents_t data for a glyph ID * in the specified font. * * Return value: `true` if data found, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_get_glyph_extents (hb_font_t *font, hb_codepoint_t glyph, hb_glyph_extents_t *extents) { return font->get_glyph_extents (glyph, extents); } /** * hb_font_get_glyph_contour_point: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @point_index: The contour-point index to query * @x: (out): The X value retrieved for the contour point * @y: (out): The Y value retrieved for the contour point * * Fetches the (x,y) coordinates of a specified contour-point index * in the specified glyph, within the specified font. * * Return value: `true` if data found, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_get_glyph_contour_point (hb_font_t *font, hb_codepoint_t glyph, unsigned int point_index, hb_position_t *x, hb_position_t *y) { return font->get_glyph_contour_point (glyph, point_index, x, y); } /** * hb_font_get_glyph_name: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @name: (out) (array length=size): Name string retrieved for the glyph ID * @size: Length of the glyph-name string retrieved * * Fetches the glyph-name string for a glyph ID in the specified @font. * * According to the OpenType specification, glyph names are limited to 63 * characters and can only contain (a subset of) ASCII. * * Return value: `true` if data found, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_get_glyph_name (hb_font_t *font, hb_codepoint_t glyph, char *name, unsigned int size) { return font->get_glyph_name (glyph, name, size); } /** * hb_font_get_glyph_from_name: * @font: #hb_font_t to work upon * @name: (array length=len): The name string to query * @len: The length of the name queried * @glyph: (out): The glyph ID retrieved * * Fetches the glyph ID that corresponds to a name string in the specified @font. * * Note: @len == -1 means the name string is null-terminated. * * Return value: `true` if data found, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_get_glyph_from_name (hb_font_t *font, const char *name, int len, /* -1 means nul-terminated */ hb_codepoint_t *glyph) { return font->get_glyph_from_name (name, len, glyph); } /** * hb_font_get_glyph_shape: * @font: #hb_font_t to work upon * @glyph: : The glyph ID * @dfuncs: #hb_draw_funcs_t to draw to * @draw_data: User data to pass to draw callbacks * * Fetches the glyph shape that corresponds to a glyph in the specified @font. * The shape is returned by way of calls to the callbacks of the @dfuncs * objects, with @draw_data passed to them. * * Since: 4.0.0 */ void hb_font_get_glyph_shape (hb_font_t *font, hb_codepoint_t glyph, hb_draw_funcs_t *dfuncs, void *draw_data) { hb_font_draw_glyph (font, glyph, dfuncs, draw_data); } /** * hb_font_draw_glyph: * @font: #hb_font_t to work upon * @glyph: : The glyph ID * @dfuncs: #hb_draw_funcs_t to draw to * @draw_data: User data to pass to draw callbacks * * Draws the outline that corresponds to a glyph in the specified @font. * * The outline is returned by way of calls to the callbacks of the @dfuncs * objects, with @draw_data passed to them. * * XSince: REPLACEME **/ void hb_font_draw_glyph (hb_font_t *font, hb_codepoint_t glyph, hb_draw_funcs_t *dfuncs, void *draw_data) { font->draw_glyph (glyph, dfuncs, draw_data); } /** * hb_font_paint_glyph: * @font: #hb_font_t to work upon * @glyph: The glyph ID * @pfuncs: #hb_paint_funcs_t to paint with * @paint_data: User data to pass to paint callbacks * @palette_index: The index of the font's color palette to use * @foreground: The foreground color, unpremultipled * * Paints the glyph. * * The painting instructions are returned by way of calls to * the callbacks of the @funcs object, with @paint_data passed * to them. * * If the font has color palettes (see hb_ot_color_has_palettes()), * then @palette_index selects the palette to use. If the font only * has one palette, this will be 0. * * XSince: REPLACEME */ void hb_font_paint_glyph (hb_font_t *font, hb_codepoint_t glyph, hb_paint_funcs_t *pfuncs, void *paint_data, unsigned int palette_index, hb_color_t foreground) { font->paint_glyph (glyph, pfuncs, paint_data, palette_index, foreground); } /* A bit higher-level, and with fallback */ /** * hb_font_get_extents_for_direction: * @font: #hb_font_t to work upon * @direction: The direction of the text segment * @extents: (out): The #hb_font_extents_t retrieved * * Fetches the extents for a font in a text segment of the * specified direction. * * Calls the appropriate direction-specific variant (horizontal * or vertical) depending on the value of @direction. * * Since: 1.1.3 **/ void hb_font_get_extents_for_direction (hb_font_t *font, hb_direction_t direction, hb_font_extents_t *extents) { font->get_extents_for_direction (direction, extents); } /** * hb_font_get_glyph_advance_for_direction: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @direction: The direction of the text segment * @x: (out): The horizontal advance retrieved * @y: (out): The vertical advance retrieved * * Fetches the advance for a glyph ID from the specified font, * in a text segment of the specified direction. * * Calls the appropriate direction-specific variant (horizontal * or vertical) depending on the value of @direction. * * Since: 0.9.2 **/ void hb_font_get_glyph_advance_for_direction (hb_font_t *font, hb_codepoint_t glyph, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { font->get_glyph_advance_for_direction (glyph, direction, x, y); } /** * hb_font_get_glyph_advances_for_direction: * @font: #hb_font_t to work upon * @direction: The direction of the text segment * @count: The number of glyph IDs in the sequence queried * @first_glyph: The first glyph ID to query * @glyph_stride: The stride between successive glyph IDs * @first_advance: (out): The first advance retrieved * @advance_stride: (out): The stride between successive advances * * Fetches the advances for a sequence of glyph IDs in the specified * font, in a text segment of the specified direction. * * Calls the appropriate direction-specific variant (horizontal * or vertical) depending on the value of @direction. * * Since: 1.8.6 **/ HB_EXTERN void hb_font_get_glyph_advances_for_direction (hb_font_t* font, hb_direction_t direction, unsigned int count, const hb_codepoint_t *first_glyph, unsigned glyph_stride, hb_position_t *first_advance, unsigned advance_stride) { font->get_glyph_advances_for_direction (direction, count, first_glyph, glyph_stride, first_advance, advance_stride); } /** * hb_font_get_glyph_origin_for_direction: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @direction: The direction of the text segment * @x: (out): The X coordinate retrieved for the origin * @y: (out): The Y coordinate retrieved for the origin * * Fetches the (X,Y) coordinates of the origin for a glyph in * the specified font. * * Calls the appropriate direction-specific variant (horizontal * or vertical) depending on the value of @direction. * * Since: 0.9.2 **/ void hb_font_get_glyph_origin_for_direction (hb_font_t *font, hb_codepoint_t glyph, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { return font->get_glyph_origin_for_direction (glyph, direction, x, y); } /** * hb_font_add_glyph_origin_for_direction: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @direction: The direction of the text segment * @x: (inout): Input = The original X coordinate * Output = The X coordinate plus the X-coordinate of the origin * @y: (inout): Input = The original Y coordinate * Output = The Y coordinate plus the Y-coordinate of the origin * * Adds the origin coordinates to an (X,Y) point coordinate, in * the specified glyph ID in the specified font. * * Calls the appropriate direction-specific variant (horizontal * or vertical) depending on the value of @direction. * * Since: 0.9.2 **/ void hb_font_add_glyph_origin_for_direction (hb_font_t *font, hb_codepoint_t glyph, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { return font->add_glyph_origin_for_direction (glyph, direction, x, y); } /** * hb_font_subtract_glyph_origin_for_direction: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @direction: The direction of the text segment * @x: (inout): Input = The original X coordinate * Output = The X coordinate minus the X-coordinate of the origin * @y: (inout): Input = The original Y coordinate * Output = The Y coordinate minus the Y-coordinate of the origin * * Subtracts the origin coordinates from an (X,Y) point coordinate, * in the specified glyph ID in the specified font. * * Calls the appropriate direction-specific variant (horizontal * or vertical) depending on the value of @direction. * * Since: 0.9.2 **/ void hb_font_subtract_glyph_origin_for_direction (hb_font_t *font, hb_codepoint_t glyph, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { return font->subtract_glyph_origin_for_direction (glyph, direction, x, y); } /** * hb_font_get_glyph_kerning_for_direction: * @font: #hb_font_t to work upon * @first_glyph: The glyph ID of the first glyph in the glyph pair to query * @second_glyph: The glyph ID of the second glyph in the glyph pair to query * @direction: The direction of the text segment * @x: (out): The horizontal kerning-adjustment value retrieved * @y: (out): The vertical kerning-adjustment value retrieved * * Fetches the kerning-adjustment value for a glyph-pair in the specified font. * * Calls the appropriate direction-specific variant (horizontal * or vertical) depending on the value of @direction. * * Since: 0.9.2 **/ void hb_font_get_glyph_kerning_for_direction (hb_font_t *font, hb_codepoint_t first_glyph, hb_codepoint_t second_glyph, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { return font->get_glyph_kerning_for_direction (first_glyph, second_glyph, direction, x, y); } /** * hb_font_get_glyph_extents_for_origin: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @direction: The direction of the text segment * @extents: (out): The #hb_glyph_extents_t retrieved * * Fetches the #hb_glyph_extents_t data for a glyph ID * in the specified font, with respect to the origin in * a text segment in the specified direction. * * Calls the appropriate direction-specific variant (horizontal * or vertical) depending on the value of @direction. * * Return value: `true` if data found, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_get_glyph_extents_for_origin (hb_font_t *font, hb_codepoint_t glyph, hb_direction_t direction, hb_glyph_extents_t *extents) { return font->get_glyph_extents_for_origin (glyph, direction, extents); } /** * hb_font_get_glyph_contour_point_for_origin: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @point_index: The contour-point index to query * @direction: The direction of the text segment * @x: (out): The X value retrieved for the contour point * @y: (out): The Y value retrieved for the contour point * * Fetches the (X,Y) coordinates of a specified contour-point index * in the specified glyph ID in the specified font, with respect * to the origin in a text segment in the specified direction. * * Calls the appropriate direction-specific variant (horizontal * or vertical) depending on the value of @direction. * * Return value: `true` if data found, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_get_glyph_contour_point_for_origin (hb_font_t *font, hb_codepoint_t glyph, unsigned int point_index, hb_direction_t direction, hb_position_t *x, hb_position_t *y) { return font->get_glyph_contour_point_for_origin (glyph, point_index, direction, x, y); } /** * hb_font_glyph_to_string: * @font: #hb_font_t to work upon * @glyph: The glyph ID to query * @s: (out) (array length=size): The string containing the glyph name * @size: Length of string @s * * Fetches the name of the specified glyph ID in @font and returns * it in string @s. * * If the glyph ID has no name in @font, a string of the form `gidDDD` is * generated, with `DDD` being the glyph ID. * * According to the OpenType specification, glyph names are limited to 63 * characters and can only contain (a subset of) ASCII. * * Since: 0.9.2 **/ void hb_font_glyph_to_string (hb_font_t *font, hb_codepoint_t glyph, char *s, unsigned int size) { font->glyph_to_string (glyph, s, size); } /** * hb_font_glyph_from_string: * @font: #hb_font_t to work upon * @s: (array length=len) (element-type uint8_t): string to query * @len: The length of the string @s * @glyph: (out): The glyph ID corresponding to the string requested * * Fetches the glyph ID from @font that matches the specified string. * Strings of the format `gidDDD` or `uniUUUU` are parsed automatically. * * Note: @len == -1 means the string is null-terminated. * * Return value: `true` if data found, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_glyph_from_string (hb_font_t *font, const char *s, int len, hb_codepoint_t *glyph) { return font->glyph_from_string (s, len, glyph); } /* * hb_font_t */ DEFINE_NULL_INSTANCE (hb_font_t) = { HB_OBJECT_HEADER_STATIC, 0, /* serial */ 0, /* serial_coords */ nullptr, /* parent */ const_cast (&_hb_Null_hb_face_t), 1000, /* x_scale */ 1000, /* y_scale */ 0.f, /* x_embolden */ 0.f, /* y_embolden */ true, /* embolden_in_place */ 0, /* x_strength */ 0, /* y_strength */ 0.f, /* slant */ 0.f, /* slant_xy; */ 1.f, /* x_multf */ 1.f, /* y_multf */ 1<<16, /* x_mult */ 1<<16, /* y_mult */ 0, /* x_ppem */ 0, /* y_ppem */ 0, /* ptem */ HB_FONT_NO_VAR_NAMED_INSTANCE, /* instance_index */ 0, /* num_coords */ nullptr, /* coords */ nullptr, /* design_coords */ const_cast (&_hb_Null_hb_font_funcs_t), /* Zero for the rest is fine. */ }; static hb_font_t * _hb_font_create (hb_face_t *face) { hb_font_t *font; if (unlikely (!face)) face = hb_face_get_empty (); if (!(font = hb_object_create ())) return hb_font_get_empty (); hb_face_make_immutable (face); font->parent = hb_font_get_empty (); font->face = hb_face_reference (face); font->klass = hb_font_funcs_get_empty (); font->data.init0 (font); font->x_scale = font->y_scale = face->get_upem (); font->embolden_in_place = true; font->x_multf = font->y_multf = 1.f; font->x_mult = font->y_mult = 1 << 16; font->instance_index = HB_FONT_NO_VAR_NAMED_INSTANCE; return font; } /** * hb_font_create: * @face: a face. * * Constructs a new font object from the specified face. * * Note: If @face's index value (as passed to hb_face_create() * has non-zero top 16-bits, those bits minus one are passed to * hb_font_set_var_named_instance(), effectively loading a named-instance * of a variable font, instead of the default-instance. This allows * specifying which named-instance to load by default when creating the * face. * * Return value: (transfer full): The new font object * * Since: 0.9.2 **/ hb_font_t * hb_font_create (hb_face_t *face) { hb_font_t *font = _hb_font_create (face); #ifndef HB_NO_OT_FONT /* Install our in-house, very lightweight, funcs. */ hb_ot_font_set_funcs (font); #endif #ifndef HB_NO_VAR if (face && face->index >> 16) hb_font_set_var_named_instance (font, (face->index >> 16) - 1); #endif return font; } static void _hb_font_adopt_var_coords (hb_font_t *font, int *coords, /* 2.14 normalized */ float *design_coords, unsigned int coords_length) { hb_free (font->coords); hb_free (font->design_coords); font->coords = coords; font->design_coords = design_coords; font->num_coords = coords_length; font->mults_changed (); // Easiest to call this to drop cached data } /** * hb_font_create_sub_font: * @parent: The parent font object * * Constructs a sub-font font object from the specified @parent font, * replicating the parent's properties. * * Return value: (transfer full): The new sub-font font object * * Since: 0.9.2 **/ hb_font_t * hb_font_create_sub_font (hb_font_t *parent) { if (unlikely (!parent)) parent = hb_font_get_empty (); hb_font_t *font = _hb_font_create (parent->face); if (unlikely (hb_object_is_immutable (font))) return font; font->parent = hb_font_reference (parent); font->x_scale = parent->x_scale; font->y_scale = parent->y_scale; font->x_embolden = parent->x_embolden; font->y_embolden = parent->y_embolden; font->embolden_in_place = parent->embolden_in_place; font->slant = parent->slant; font->x_ppem = parent->x_ppem; font->y_ppem = parent->y_ppem; font->ptem = parent->ptem; unsigned int num_coords = parent->num_coords; if (num_coords) { int *coords = (int *) hb_calloc (num_coords, sizeof (parent->coords[0])); float *design_coords = (float *) hb_calloc (num_coords, sizeof (parent->design_coords[0])); if (likely (coords && design_coords)) { hb_memcpy (coords, parent->coords, num_coords * sizeof (parent->coords[0])); hb_memcpy (design_coords, parent->design_coords, num_coords * sizeof (parent->design_coords[0])); _hb_font_adopt_var_coords (font, coords, design_coords, num_coords); } else { hb_free (coords); hb_free (design_coords); } } font->mults_changed (); return font; } /** * hb_font_get_empty: * * Fetches the empty font object. * * Return value: (transfer full): The empty font object * * Since: 0.9.2 **/ hb_font_t * hb_font_get_empty () { return const_cast (&Null (hb_font_t)); } /** * hb_font_reference: (skip) * @font: #hb_font_t to work upon * * Increases the reference count on the given font object. * * Return value: (transfer full): The @font object * * Since: 0.9.2 **/ hb_font_t * hb_font_reference (hb_font_t *font) { return hb_object_reference (font); } /** * hb_font_destroy: (skip) * @font: #hb_font_t to work upon * * Decreases the reference count on the given font object. When the * reference count reaches zero, the font is destroyed, * freeing all memory. * * Since: 0.9.2 **/ void hb_font_destroy (hb_font_t *font) { if (!hb_object_destroy (font)) return; font->data.fini (); if (font->destroy) font->destroy (font->user_data); hb_font_destroy (font->parent); hb_face_destroy (font->face); hb_font_funcs_destroy (font->klass); hb_free (font->coords); hb_free (font->design_coords); hb_free (font); } /** * hb_font_set_user_data: (skip) * @font: #hb_font_t to work upon * @key: The user-data key * @data: A pointer to the user data * @destroy: (nullable): A callback to call when @data is not needed anymore * @replace: Whether to replace an existing data with the same key * * Attaches a user-data key/data pair to the specified font object. * * Return value: `true` if success, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_set_user_data (hb_font_t *font, hb_user_data_key_t *key, void * data, hb_destroy_func_t destroy /* May be NULL. */, hb_bool_t replace) { if (!hb_object_is_immutable (font)) font->serial++; return hb_object_set_user_data (font, key, data, destroy, replace); } /** * hb_font_get_user_data: (skip) * @font: #hb_font_t to work upon * @key: The user-data key to query * * Fetches the user-data object associated with the specified key, * attached to the specified font object. * * Return value: (transfer none): Pointer to the user data * * Since: 0.9.2 **/ void * hb_font_get_user_data (const hb_font_t *font, hb_user_data_key_t *key) { return hb_object_get_user_data (font, key); } /** * hb_font_make_immutable: * @font: #hb_font_t to work upon * * Makes @font immutable. * * Since: 0.9.2 **/ void hb_font_make_immutable (hb_font_t *font) { if (hb_object_is_immutable (font)) return; if (font->parent) hb_font_make_immutable (font->parent); hb_object_make_immutable (font); } /** * hb_font_is_immutable: * @font: #hb_font_t to work upon * * Tests whether a font object is immutable. * * Return value: `true` if @font is immutable, `false` otherwise * * Since: 0.9.2 **/ hb_bool_t hb_font_is_immutable (hb_font_t *font) { return hb_object_is_immutable (font); } /** * hb_font_get_serial: * @font: #hb_font_t to work upon * * Returns the internal serial number of the font. The serial * number is increased every time a setting on the font is * changed, using a setter function. * * Return value: serial number * * Since: 4.4.0 **/ unsigned int hb_font_get_serial (hb_font_t *font) { return font->serial; } /** * hb_font_changed: * @font: #hb_font_t to work upon * * Notifies the @font that underlying font data has changed. * This has the effect of increasing the serial as returned * by hb_font_get_serial(), which invalidates internal caches. * * Since: 4.4.0 **/ void hb_font_changed (hb_font_t *font) { if (hb_object_is_immutable (font)) return; font->serial++; font->mults_changed (); } /** * hb_font_set_parent: * @font: #hb_font_t to work upon * @parent: The parent font object to assign * * Sets the parent font of @font. * * Since: 1.0.5 **/ void hb_font_set_parent (hb_font_t *font, hb_font_t *parent) { if (hb_object_is_immutable (font)) return; if (parent == font->parent) return; font->serial++; if (!parent) parent = hb_font_get_empty (); hb_font_t *old = font->parent; font->parent = hb_font_reference (parent); hb_font_destroy (old); } /** * hb_font_get_parent: * @font: #hb_font_t to work upon * * Fetches the parent font of @font. * * Return value: (transfer none): The parent font object * * Since: 0.9.2 **/ hb_font_t * hb_font_get_parent (hb_font_t *font) { return font->parent; } /** * hb_font_set_face: * @font: #hb_font_t to work upon * @face: The #hb_face_t to assign * * Sets @face as the font-face value of @font. * * Since: 1.4.3 **/ void hb_font_set_face (hb_font_t *font, hb_face_t *face) { if (hb_object_is_immutable (font)) return; if (face == font->face) return; font->serial++; if (unlikely (!face)) face = hb_face_get_empty (); hb_face_t *old = font->face; hb_face_make_immutable (face); font->face = hb_face_reference (face); font->mults_changed (); hb_face_destroy (old); } /** * hb_font_get_face: * @font: #hb_font_t to work upon * * Fetches the face associated with the specified font object. * * Return value: (transfer none): The #hb_face_t value * * Since: 0.9.2 **/ hb_face_t * hb_font_get_face (hb_font_t *font) { return font->face; } /** * hb_font_set_funcs: * @font: #hb_font_t to work upon * @klass: (closure font_data) (destroy destroy) (scope notified): The font-functions structure. * @font_data: Data to attach to @font * @destroy: (nullable): The function to call when @font_data is not needed anymore * * Replaces the font-functions structure attached to a font, updating * the font's user-data with @font-data and the @destroy callback. * * Since: 0.9.2 **/ void hb_font_set_funcs (hb_font_t *font, hb_font_funcs_t *klass, void *font_data, hb_destroy_func_t destroy /* May be NULL. */) { if (hb_object_is_immutable (font)) { if (destroy) destroy (font_data); return; } font->serial++; if (font->destroy) font->destroy (font->user_data); if (!klass) klass = hb_font_funcs_get_empty (); hb_font_funcs_reference (klass); hb_font_funcs_destroy (font->klass); font->klass = klass; font->user_data = font_data; font->destroy = destroy; } /** * hb_font_set_funcs_data: * @font: #hb_font_t to work upon * @font_data: (destroy destroy) (scope notified): Data to attach to @font * @destroy: (nullable): The function to call when @font_data is not needed anymore * * Replaces the user data attached to a font, updating the font's * @destroy callback. * * Since: 0.9.2 **/ void hb_font_set_funcs_data (hb_font_t *font, void *font_data, hb_destroy_func_t destroy /* May be NULL. */) { /* Destroy user_data? */ if (hb_object_is_immutable (font)) { if (destroy) destroy (font_data); return; } font->serial++; if (font->destroy) font->destroy (font->user_data); font->user_data = font_data; font->destroy = destroy; } /** * hb_font_set_scale: * @font: #hb_font_t to work upon * @x_scale: Horizontal scale value to assign * @y_scale: Vertical scale value to assign * * Sets the horizontal and vertical scale of a font. * * The font scale is a number related to, but not the same as, * font size. Typically the client establishes a scale factor * to be used between the two. For example, 64, or 256, which * would be the fractional-precision part of the font scale. * This is necessary because #hb_position_t values are integer * types and you need to leave room for fractional values * in there. * * For example, to set the font size to 20, with 64 * levels of fractional precision you would call * `hb_font_set_scale(font, 20 * 64, 20 * 64)`. * * In the example above, even what font size 20 means is up to * you. It might be 20 pixels, or 20 points, or 20 millimeters. * HarfBuzz does not care about that. You can set the point * size of the font using hb_font_set_ptem(), and the pixel * size using hb_font_set_ppem(). * * The choice of scale is yours but needs to be consistent between * what you set here, and what you expect out of #hb_position_t * as well has draw / paint API output values. * * Fonts default to a scale equal to the UPEM value of their face. * A font with this setting is sometimes called an "unscaled" font. * * Since: 0.9.2 **/ void hb_font_set_scale (hb_font_t *font, int x_scale, int y_scale) { if (hb_object_is_immutable (font)) return; if (font->x_scale == x_scale && font->y_scale == y_scale) return; font->serial++; font->x_scale = x_scale; font->y_scale = y_scale; font->mults_changed (); } /** * hb_font_get_scale: * @font: #hb_font_t to work upon * @x_scale: (out): Horizontal scale value * @y_scale: (out): Vertical scale value * * Fetches the horizontal and vertical scale of a font. * * Since: 0.9.2 **/ void hb_font_get_scale (hb_font_t *font, int *x_scale, int *y_scale) { if (x_scale) *x_scale = font->x_scale; if (y_scale) *y_scale = font->y_scale; } /** * hb_font_set_ppem: * @font: #hb_font_t to work upon * @x_ppem: Horizontal ppem value to assign * @y_ppem: Vertical ppem value to assign * * Sets the horizontal and vertical pixels-per-em (PPEM) of a font. * * These values are used for pixel-size-specific adjustment to * shaping and draw results, though for the most part they are * unused and can be left unset. * * Since: 0.9.2 **/ void hb_font_set_ppem (hb_font_t *font, unsigned int x_ppem, unsigned int y_ppem) { if (hb_object_is_immutable (font)) return; if (font->x_ppem == x_ppem && font->y_ppem == y_ppem) return; font->serial++; font->x_ppem = x_ppem; font->y_ppem = y_ppem; } /** * hb_font_get_ppem: * @font: #hb_font_t to work upon * @x_ppem: (out): Horizontal ppem value * @y_ppem: (out): Vertical ppem value * * Fetches the horizontal and vertical points-per-em (ppem) of a font. * * Since: 0.9.2 **/ void hb_font_get_ppem (hb_font_t *font, unsigned int *x_ppem, unsigned int *y_ppem) { if (x_ppem) *x_ppem = font->x_ppem; if (y_ppem) *y_ppem = font->y_ppem; } /** * hb_font_set_ptem: * @font: #hb_font_t to work upon * @ptem: font size in points. * * Sets the "point size" of a font. Set to zero to unset. * Used in CoreText to implement optical sizing. * * Note: There are 72 points in an inch. * * Since: 1.6.0 **/ void hb_font_set_ptem (hb_font_t *font, float ptem) { if (hb_object_is_immutable (font)) return; if (font->ptem == ptem) return; font->serial++; font->ptem = ptem; } /** * hb_font_get_ptem: * @font: #hb_font_t to work upon * * Fetches the "point size" of a font. Used in CoreText to * implement optical sizing. * * Return value: Point size. A value of zero means "not set." * * Since: 1.6.0 **/ float hb_font_get_ptem (hb_font_t *font) { return font->ptem; } /** * hb_font_set_synthetic_bold: * @font: #hb_font_t to work upon * @x_embolden: the amount to embolden horizontally * @y_embolden: the amount to embolden vertically * @in_place: whether to embolden glyphs in-place * * Sets the "synthetic boldness" of a font. * * Positive values for @x_embolden / @y_embolden make a font * bolder, negative values thinner. Typical values are in the * 0.01 to 0.05 range. The default value is zero. * * Synthetic boldness is applied by offsetting the contour * points of the glyph shape. * * Synthetic boldness is applied when rendering a glyph via * hb_font_draw_glyph(). * * If @in_place is `FALSE`, then glyph advance-widths are also * adjusted, otherwise they are not. The in-place mode is * useful for simulating [font grading](https://fonts.google.com/knowledge/glossary/grade). * * * XSince: REPLACEME **/ void hb_font_set_synthetic_bold (hb_font_t *font, float x_embolden, float y_embolden, hb_bool_t in_place) { if (hb_object_is_immutable (font)) return; if (font->x_embolden == x_embolden && font->y_embolden == y_embolden && font->embolden_in_place == in_place) return; font->serial++; font->x_embolden = x_embolden; font->y_embolden = y_embolden; font->embolden_in_place = in_place; font->mults_changed (); } /** * hb_font_get_synthetic_bold: * @font: #hb_font_t to work upon * @x_embolden: (out): return location for horizontal value * @y_embolden: (out): return location for vertical value * @in_place: (out): return location for in-place value * * Fetches the "synthetic boldness" parameters of a font. * * XSince: REPLACEME **/ void hb_font_get_synthetic_bold (hb_font_t *font, float *x_embolden, float *y_embolden, hb_bool_t *in_place) { if (x_embolden) *x_embolden = font->x_embolden; if (y_embolden) *y_embolden = font->y_embolden; if (in_place) *in_place = font->embolden_in_place; } /** * hb_font_set_synthetic_slant: * @font: #hb_font_t to work upon * @slant: synthetic slant value. * * Sets the "synthetic slant" of a font. By default is zero. * Synthetic slant is the graphical skew applied to the font * at rendering time. * * HarfBuzz needs to know this value to adjust shaping results, * metrics, and style values to match the slanted rendering. * * Note: The glyph shape fetched via the hb_font_draw_glyph() * function is slanted to reflect this value as well. * * Note: The slant value is a ratio. For example, a * 20% slant would be represented as a 0.2 value. * * Since: 3.3.0 **/ HB_EXTERN void hb_font_set_synthetic_slant (hb_font_t *font, float slant) { if (hb_object_is_immutable (font)) return; if (font->slant == slant) return; font->serial++; font->slant = slant; font->mults_changed (); } /** * hb_font_get_synthetic_slant: * @font: #hb_font_t to work upon * * Fetches the "synthetic slant" of a font. * * Return value: Synthetic slant. By default is zero. * * Since: 3.3.0 **/ HB_EXTERN float hb_font_get_synthetic_slant (hb_font_t *font) { return font->slant; } #ifndef HB_NO_VAR /* * Variations */ /** * hb_font_set_variations: * @font: #hb_font_t to work upon * @variations: (array length=variations_length): Array of variation settings to apply * @variations_length: Number of variations to apply * * Applies a list of font-variation settings to a font. * * Note that this overrides all existing variations set on @font. * Axes not included in @variations will be effectively set to their * default values. * * Since: 1.4.2 */ void hb_font_set_variations (hb_font_t *font, const hb_variation_t *variations, unsigned int variations_length) { if (hb_object_is_immutable (font)) return; font->serial_coords = ++font->serial; if (!variations_length && font->instance_index == HB_FONT_NO_VAR_NAMED_INSTANCE) { hb_font_set_var_coords_normalized (font, nullptr, 0); return; } const OT::fvar &fvar = *font->face->table.fvar; auto axes = fvar.get_axes (); const unsigned coords_length = axes.length; int *normalized = coords_length ? (int *) hb_calloc (coords_length, sizeof (int)) : nullptr; float *design_coords = coords_length ? (float *) hb_calloc (coords_length, sizeof (float)) : nullptr; if (unlikely (coords_length && !(normalized && design_coords))) { hb_free (normalized); hb_free (design_coords); return; } /* Initialize design coords. */ for (unsigned int i = 0; i < coords_length; i++) design_coords[i] = axes[i].get_default (); if (font->instance_index != HB_FONT_NO_VAR_NAMED_INSTANCE) { unsigned count = coords_length; /* This may fail if index is out-of-range; * That's why we initialize design_coords from fvar above * unconditionally. */ hb_ot_var_named_instance_get_design_coords (font->face, font->instance_index, &count, design_coords); } for (unsigned int i = 0; i < variations_length; i++) { const auto tag = variations[i].tag; const auto v = variations[i].value; for (unsigned axis_index = 0; axis_index < coords_length; axis_index++) if (axes[axis_index].axisTag == tag) design_coords[axis_index] = v; } font->face->table.avar->map_coords (normalized, coords_length); hb_ot_var_normalize_coords (font->face, coords_length, design_coords, normalized); _hb_font_adopt_var_coords (font, normalized, design_coords, coords_length); } /** * hb_font_set_var_coords_design: * @font: #hb_font_t to work upon * @coords: (array length=coords_length): Array of variation coordinates to apply * @coords_length: Number of coordinates to apply * * Applies a list of variation coordinates (in design-space units) * to a font. * * Note that this overrides all existing variations set on @font. * Axes not included in @coords will be effectively set to their * default values. * * Since: 1.4.2 */ void hb_font_set_var_coords_design (hb_font_t *font, const float *coords, unsigned int coords_length) { if (hb_object_is_immutable (font)) return; font->serial_coords = ++font->serial; int *normalized = coords_length ? (int *) hb_calloc (coords_length, sizeof (int)) : nullptr; float *design_coords = coords_length ? (float *) hb_calloc (coords_length, sizeof (float)) : nullptr; if (unlikely (coords_length && !(normalized && design_coords))) { hb_free (normalized); hb_free (design_coords); return; } if (coords_length) hb_memcpy (design_coords, coords, coords_length * sizeof (font->design_coords[0])); hb_ot_var_normalize_coords (font->face, coords_length, coords, normalized); _hb_font_adopt_var_coords (font, normalized, design_coords, coords_length); } /** * hb_font_set_var_named_instance: * @font: a font. * @instance_index: named instance index. * * Sets design coords of a font from a named-instance index. * * Since: 2.6.0 */ void hb_font_set_var_named_instance (hb_font_t *font, unsigned int instance_index) { if (hb_object_is_immutable (font)) return; if (font->instance_index == instance_index) return; font->serial_coords = ++font->serial; font->instance_index = instance_index; hb_font_set_variations (font, nullptr, 0); } /** * hb_font_get_var_named_instance: * @font: a font. * * Returns the currently-set named-instance index of the font. * * Return value: Named-instance index or %HB_FONT_NO_VAR_NAMED_INSTANCE. * * XSince: REPLACEME **/ unsigned int hb_font_get_var_named_instance (hb_font_t *font) { return font->instance_index; } /** * hb_font_set_var_coords_normalized: * @font: #hb_font_t to work upon * @coords: (array length=coords_length): Array of variation coordinates to apply * @coords_length: Number of coordinates to apply * * Applies a list of variation coordinates (in normalized units) * to a font. * * Note that this overrides all existing variations set on @font. * Axes not included in @coords will be effectively set to their * default values. * * Note: Coordinates should be normalized to 2.14. * * Since: 1.4.2 */ void hb_font_set_var_coords_normalized (hb_font_t *font, const int *coords, /* 2.14 normalized */ unsigned int coords_length) { if (hb_object_is_immutable (font)) return; font->serial_coords = ++font->serial; int *copy = coords_length ? (int *) hb_calloc (coords_length, sizeof (coords[0])) : nullptr; int *unmapped = coords_length ? (int *) hb_calloc (coords_length, sizeof (coords[0])) : nullptr; float *design_coords = coords_length ? (float *) hb_calloc (coords_length, sizeof (design_coords[0])) : nullptr; if (unlikely (coords_length && !(copy && unmapped && design_coords))) { hb_free (copy); hb_free (unmapped); hb_free (design_coords); return; } if (coords_length) { hb_memcpy (copy, coords, coords_length * sizeof (coords[0])); hb_memcpy (unmapped, coords, coords_length * sizeof (coords[0])); } /* Best effort design coords simulation */ font->face->table.avar->unmap_coords (unmapped, coords_length); for (unsigned int i = 0; i < coords_length; ++i) design_coords[i] = font->face->table.fvar->unnormalize_axis_value (i, unmapped[i]); hb_free (unmapped); _hb_font_adopt_var_coords (font, copy, design_coords, coords_length); } /** * hb_font_get_var_coords_normalized: * @font: #hb_font_t to work upon * @length: (out): Number of coordinates retrieved * * Fetches the list of normalized variation coordinates currently * set on a font. * * Note that this returned array may only contain values for some * (or none) of the axes; omitted axes effectively have zero values. * * Return value is valid as long as variation coordinates of the font * are not modified. * * Return value: coordinates array * * Since: 1.4.2 */ const int * hb_font_get_var_coords_normalized (hb_font_t *font, unsigned int *length) { if (length) *length = font->num_coords; return font->coords; } /** * hb_font_get_var_coords_design: * @font: #hb_font_t to work upon * @length: (out): Number of coordinates retrieved * * Fetches the list of variation coordinates (in design-space units) currently * set on a font. * * Note that this returned array may only contain values for some * (or none) of the axes; omitted axes effectively have their default * values. * * Return value is valid as long as variation coordinates of the font * are not modified. * * Return value: coordinates array * * Since: 3.3.0 */ const float * hb_font_get_var_coords_design (hb_font_t *font, unsigned int *length) { if (length) *length = font->num_coords; return font->design_coords; } #endif #ifndef HB_DISABLE_DEPRECATED /* * Deprecated get_glyph_func(): */ struct hb_trampoline_closure_t { void *user_data; hb_destroy_func_t destroy; unsigned int ref_count; }; template struct hb_trampoline_t { hb_trampoline_closure_t closure; /* Must be first. */ FuncType func; }; template static hb_trampoline_t * trampoline_create (FuncType func, void *user_data, hb_destroy_func_t destroy) { typedef hb_trampoline_t trampoline_t; trampoline_t *trampoline = (trampoline_t *) hb_calloc (1, sizeof (trampoline_t)); if (unlikely (!trampoline)) return nullptr; trampoline->closure.user_data = user_data; trampoline->closure.destroy = destroy; trampoline->closure.ref_count = 1; trampoline->func = func; return trampoline; } static void trampoline_reference (hb_trampoline_closure_t *closure) { closure->ref_count++; } static void trampoline_destroy (void *user_data) { hb_trampoline_closure_t *closure = (hb_trampoline_closure_t *) user_data; if (--closure->ref_count) return; if (closure->destroy) closure->destroy (closure->user_data); hb_free (closure); } typedef hb_trampoline_t hb_font_get_glyph_trampoline_t; static hb_bool_t hb_font_get_nominal_glyph_trampoline (hb_font_t *font, void *font_data, hb_codepoint_t unicode, hb_codepoint_t *glyph, void *user_data) { hb_font_get_glyph_trampoline_t *trampoline = (hb_font_get_glyph_trampoline_t *) user_data; return trampoline->func (font, font_data, unicode, 0, glyph, trampoline->closure.user_data); } static hb_bool_t hb_font_get_variation_glyph_trampoline (hb_font_t *font, void *font_data, hb_codepoint_t unicode, hb_codepoint_t variation_selector, hb_codepoint_t *glyph, void *user_data) { hb_font_get_glyph_trampoline_t *trampoline = (hb_font_get_glyph_trampoline_t *) user_data; return trampoline->func (font, font_data, unicode, variation_selector, glyph, trampoline->closure.user_data); } /** * hb_font_funcs_set_glyph_func: * @ffuncs: The font-functions structure * @func: (closure user_data) (destroy destroy) (scope notified): callback function * @user_data: data to pass to @func * @destroy: (nullable): function to call when @user_data is not needed anymore * * Deprecated. Use hb_font_funcs_set_nominal_glyph_func() and * hb_font_funcs_set_variation_glyph_func() instead. * * Since: 0.9.2 * Deprecated: 1.2.3 **/ void hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs, hb_font_get_glyph_func_t func, void *user_data, hb_destroy_func_t destroy /* May be NULL. */) { if (hb_object_is_immutable (ffuncs)) { if (destroy) destroy (user_data); return; } hb_font_get_glyph_trampoline_t *trampoline; trampoline = trampoline_create (func, user_data, destroy); if (unlikely (!trampoline)) { if (destroy) destroy (user_data); return; } /* Since we pass it to two destroying functions. */ trampoline_reference (&trampoline->closure); hb_font_funcs_set_nominal_glyph_func (ffuncs, hb_font_get_nominal_glyph_trampoline, trampoline, trampoline_destroy); hb_font_funcs_set_variation_glyph_func (ffuncs, hb_font_get_variation_glyph_trampoline, trampoline, trampoline_destroy); } #endif void hb_font_funcs_set_glyph_shape_func (hb_font_funcs_t *ffuncs, hb_font_get_glyph_shape_func_t func, void *user_data, hb_destroy_func_t destroy /* May be NULL. */) { hb_font_funcs_set_draw_glyph_func (ffuncs, func, user_data, destroy); }