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kc3-lang/harfbuzz/src/hb-font.cc
Behdad Esfahbod
- src/hb-font.cc
-
/* * 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-private.hh" #include "hb-ot-layout-private.hh" #include "hb-font-private.hh" #include "hb-open-file-private.hh" #include "hb-ot-head-table.hh" #include "hb-ot-maxp-table.hh" #include "hb-cache-private.hh" #include <string.h> /* * hb_font_funcs_t */ static hb_bool_t hb_font_get_glyph_nil (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) { if (font->parent) return font->parent->get_glyph (unicode, variation_selector, glyph); *glyph = 0; return false; } static hb_position_t hb_font_get_glyph_h_advance_nil (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, void *user_data HB_UNUSED) { if (font->parent) return font->parent_scale_x_distance (font->parent->get_glyph_h_advance (glyph)); return font->x_scale; } static hb_position_t hb_font_get_glyph_v_advance_nil (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, void *user_data HB_UNUSED) { if (font->parent) return font->parent_scale_y_distance (font->parent->get_glyph_v_advance (glyph)); return font->y_scale; } static hb_bool_t hb_font_get_glyph_h_origin_nil (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) { if (font->parent) { hb_bool_t ret = font->parent->get_glyph_h_origin (glyph, x, y); if (ret) font->parent_scale_position (x, y); return ret; } *x = *y = 0; return false; } static hb_bool_t hb_font_get_glyph_v_origin_nil (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) { if (font->parent) { hb_bool_t ret = font->parent->get_glyph_v_origin (glyph, x, y); if (ret) font->parent_scale_position (x, y); return ret; } *x = *y = 0; return false; } static hb_position_t hb_font_get_glyph_h_kerning_nil (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t left_glyph, hb_codepoint_t right_glyph, void *user_data HB_UNUSED) { if (font->parent) return font->parent_scale_x_distance (font->parent->get_glyph_h_kerning (left_glyph, right_glyph)); return 0; } static hb_position_t hb_font_get_glyph_v_kerning_nil (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t top_glyph, hb_codepoint_t bottom_glyph, void *user_data HB_UNUSED) { if (font->parent) return font->parent_scale_y_distance (font->parent->get_glyph_v_kerning (top_glyph, bottom_glyph)); return 0; } static hb_bool_t hb_font_get_glyph_extents_nil (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, hb_glyph_extents_t *extents, void *user_data HB_UNUSED) { if (font->parent) { 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; } memset (extents, 0, sizeof (*extents)); return false; } static hb_bool_t hb_font_get_glyph_contour_point_nil (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) { if (font->parent) { 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; } *x = *y = 0; return false; } static hb_bool_t hb_font_get_glyph_name_nil (hb_font_t *font, void *font_data HB_UNUSED, hb_codepoint_t glyph, char *name, unsigned int size, void *user_data HB_UNUSED) { if (font->parent) return font->parent->get_glyph_name (glyph, name, size); if (size) *name = '\0'; return false; } static hb_bool_t hb_font_get_glyph_from_name_nil (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) { if (font->parent) return font->parent->get_glyph_from_name (name, len, glyph); *glyph = 0; return false; } static const hb_font_funcs_t _hb_font_funcs_nil = { HB_OBJECT_HEADER_STATIC, true, /* immutable */ { #define HB_FONT_FUNC_IMPLEMENT(name) hb_font_get_##name##_nil, HB_FONT_FUNCS_IMPLEMENT_CALLBACKS #undef HB_FONT_FUNC_IMPLEMENT } }; /** * hb_font_funcs_create: (Xconstructor) * * * * Return value: (transfer full): * * Since: 1.0 **/ hb_font_funcs_t * hb_font_funcs_create (void) { hb_font_funcs_t *ffuncs; if (!(ffuncs = hb_object_create<hb_font_funcs_t> ())) return hb_font_funcs_get_empty (); ffuncs->get = _hb_font_funcs_nil.get; return ffuncs; } /** * hb_font_funcs_get_empty: * * * * Return value: (transfer full): * * Since: 1.0 **/ hb_font_funcs_t * hb_font_funcs_get_empty (void) { return const_cast<hb_font_funcs_t *> (&_hb_font_funcs_nil); } /** * hb_font_funcs_reference: (skip) * @ffuncs: font functions. * * * * Return value: * * Since: 1.0 **/ hb_font_funcs_t * hb_font_funcs_reference (hb_font_funcs_t *ffuncs) { return hb_object_reference (ffuncs); } /** * hb_font_funcs_destroy: (skip) * @ffuncs: font functions. * * * * Since: 1.0 **/ void hb_font_funcs_destroy (hb_font_funcs_t *ffuncs) { if (!hb_object_destroy (ffuncs)) return; #define HB_FONT_FUNC_IMPLEMENT(name) if (ffuncs->destroy.name) \ ffuncs->destroy.name (ffuncs->user_data.name); HB_FONT_FUNCS_IMPLEMENT_CALLBACKS #undef HB_FONT_FUNC_IMPLEMENT free (ffuncs); } /** * hb_font_funcs_set_user_data: (skip) * @ffuncs: font functions. * @key: * @data: * @destroy: * @replace: * * * * Return value: * * Since: 1.0 **/ 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, hb_bool_t replace) { return hb_object_set_user_data (ffuncs, key, data, destroy, replace); } /** * hb_font_funcs_get_user_data: (skip) * @ffuncs: font functions. * @key: * * * * Return value: (transfer none): * * Since: 1.0 **/ void * hb_font_funcs_get_user_data (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: font functions. * * * * Since: 1.0 **/ void hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs) { if (hb_object_is_inert (ffuncs)) return; ffuncs->immutable = true; } /** * hb_font_funcs_is_immutable: * @ffuncs: font functions. * * * * Return value: * * Since: 1.0 **/ hb_bool_t hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs) { return ffuncs->immutable; } #define HB_FONT_FUNC_IMPLEMENT(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 (ffuncs->immutable) { \ if (destroy) \ destroy (user_data); \ return; \ } \ \ if (ffuncs->destroy.name) \ ffuncs->destroy.name (ffuncs->user_data.name); \ \ if (func) { \ ffuncs->get.name = func; \ ffuncs->user_data.name = user_data; \ ffuncs->destroy.name = destroy; \ } else { \ ffuncs->get.name = hb_font_get_##name##_nil; \ ffuncs->user_data.name = NULL; \ ffuncs->destroy.name = NULL; \ } \ } HB_FONT_FUNCS_IMPLEMENT_CALLBACKS #undef HB_FONT_FUNC_IMPLEMENT /* Public getters */ /** * hb_font_get_glyph: * @font: a font. * @unicode: * @variation_selector: * @glyph: (out): * * * * Return value: * * Since: 1.0 **/ hb_bool_t hb_font_get_glyph (hb_font_t *font, hb_codepoint_t unicode, hb_codepoint_t variation_selector, hb_codepoint_t *glyph) { return font->get_glyph (unicode, variation_selector, glyph); } /** * hb_font_get_glyph_h_advance: * @font: a font. * @glyph: * * * * Return value: * * Since: 1.0 **/ 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: a font. * @glyph: * * * * Return value: * * Since: 1.0 **/ 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_origin: * @font: a font. * @glyph: * @x: (out): * @y: (out): * * * * Return value: * * Since: 1.0 **/ 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: a font. * @glyph: * @x: (out): * @y: (out): * * * * Return value: * * Since: 1.0 **/ 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: a font. * @left_glyph: * @right_glyph: * * * * Return value: * * Since: 1.0 **/ 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); } /** * hb_font_get_glyph_v_kerning: * @font: a font. * @top_glyph: * @bottom_glyph: * * * * Return value: * * Since: 1.0 **/ 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); } /** * hb_font_get_glyph_extents: * @font: a font. * @glyph: * @extents: (out): * * * * Return value: * * Since: 1.0 **/ 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: a font. * @glyph: * @point_index: * @x: (out): * @y: (out): * * * * Return value: * * Since: 1.0 **/ 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: a font. * @glyph: * @name: (array length=size): * @size: * * * * Return value: * * Since: 1.0 **/ 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: a font. * @name: (array length=len): * @len: * @glyph: (out): * * * * Return value: * * Since: 1.0 **/ 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); } /* A bit higher-level, and with fallback */ /** * hb_font_get_glyph_advance_for_direction: * @font: a font. * @glyph: * @direction: * @x: (out): * @y: (out): * * * * Since: 1.0 **/ 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) { return font->get_glyph_advance_for_direction (glyph, direction, x, y); } /** * hb_font_get_glyph_origin_for_direction: * @font: a font. * @glyph: * @direction: * @x: (out): * @y: (out): * * * * Since: 1.0 **/ 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: a font. * @glyph: * @direction: * @x: (out): * @y: (out): * * * * Since: 1.0 **/ 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: a font. * @glyph: * @direction: * @x: (out): * @y: (out): * * * * Since: 1.0 **/ 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: a font. * @first_glyph: * @second_glyph: * @direction: * @x: (out): * @y: (out): * * * * Since: 1.0 **/ 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: a font. * @glyph: * @direction: * @extents: (out): * * * * Return value: * * Since: 1.0 **/ 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: a font. * @glyph: * @point_index: * @direction: * @x: (out): * @y: (out): * * * * Return value: * * Since: 1.0 **/ 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); } /* Generates gidDDD if glyph has no name. */ /** * hb_font_glyph_to_string: * @font: a font. * @glyph: * @s: (array length=size): * @size: * * * * Since: 1.0 **/ 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); } /* Parses gidDDD and uniUUUU strings automatically. */ /** * hb_font_glyph_from_string: * @font: a font. * @s: (array length=len): * @len: * @glyph: (out): * * * * Return value: * * Since: 1.0 **/ hb_bool_t hb_font_glyph_from_string (hb_font_t *font, const char *s, int len, /* -1 means nul-terminated */ hb_codepoint_t *glyph) { return font->glyph_from_string (s, len, glyph); } /* * hb_font_t */ /** * hb_font_create: (Xconstructor) * @face: a face. * * * * Return value: (transfer full): * * Since: 1.0 **/ hb_font_t * hb_font_create (hb_face_t *face) { hb_font_t *font; if (unlikely (!face)) face = hb_face_get_empty (); if (unlikely (hb_object_is_inert (face))) return hb_font_get_empty (); if (!(font = hb_object_create<hb_font_t> ())) return hb_font_get_empty (); hb_face_make_immutable (face); font->face = hb_face_reference (face); font->klass = hb_font_funcs_get_empty (); return font; } /** * hb_font_create_sub_font: * @parent: parent font. * * * * Return value: (transfer full): * * Since: 1.0 **/ hb_font_t * hb_font_create_sub_font (hb_font_t *parent) { if (unlikely (!parent)) return hb_font_get_empty (); hb_font_t *font = hb_font_create (parent->face); if (unlikely (hb_object_is_inert (font))) return font; hb_font_make_immutable (parent); font->parent = hb_font_reference (parent); font->x_scale = parent->x_scale; font->y_scale = parent->y_scale; font->x_ppem = parent->x_ppem; font->y_ppem = parent->y_ppem; return font; } /** * hb_font_get_empty: * * * * Return value: (transfer full) * * Since: 1.0 **/ hb_font_t * hb_font_get_empty (void) { static const hb_font_t _hb_font_nil = { HB_OBJECT_HEADER_STATIC, true, /* immutable */ NULL, /* parent */ const_cast<hb_face_t *> (&_hb_face_nil), 0, /* x_scale */ 0, /* y_scale */ 0, /* x_ppem */ 0, /* y_ppem */ const_cast<hb_font_funcs_t *> (&_hb_font_funcs_nil), /* klass */ NULL, /* user_data */ NULL, /* destroy */ { #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID, #include "hb-shaper-list.hh" #undef HB_SHAPER_IMPLEMENT } }; return const_cast<hb_font_t *> (&_hb_font_nil); } /** * hb_font_reference: (skip) * @font: a font. * * * * Return value: (transfer full): * * Since: 1.0 **/ hb_font_t * hb_font_reference (hb_font_t *font) { return hb_object_reference (font); } /** * hb_font_destroy: (skip) * @font: a font. * * * * Since: 1.0 **/ void hb_font_destroy (hb_font_t *font) { if (!hb_object_destroy (font)) return; #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, font); #include "hb-shaper-list.hh" #undef HB_SHAPER_IMPLEMENT if (font->destroy) font->destroy (font->user_data); hb_font_destroy (font->parent); hb_face_destroy (font->face); hb_font_funcs_destroy (font->klass); free (font); } /** * hb_font_set_user_data: (skip) * @font: a font. * @key: * @data: * @destroy: * @replace: * * * * Return value: * * Since: 1.0 **/ 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, hb_bool_t replace) { return hb_object_set_user_data (font, key, data, destroy, replace); } /** * hb_font_get_user_data: (skip) * @font: a font. * @key: * * * * Return value: (transfer none): * * Since: 1.0 **/ void * hb_font_get_user_data (hb_font_t *font, hb_user_data_key_t *key) { return hb_object_get_user_data (font, key); } /** * hb_font_make_immutable: * @font: a font. * * * * Since: 1.0 **/ void hb_font_make_immutable (hb_font_t *font) { if (hb_object_is_inert (font)) return; font->immutable = true; } /** * hb_font_is_immutable: * @font: a font. * * * * Return value: * * Since: 1.0 **/ hb_bool_t hb_font_is_immutable (hb_font_t *font) { return font->immutable; } /** * hb_font_get_parent: * @font: a font. * * * * Return value: (transfer none): * * Since: 1.0 **/ hb_font_t * hb_font_get_parent (hb_font_t *font) { return font->parent; } /** * hb_font_get_face: * @font: a font. * * * * Return value: (transfer none): * * Since: 1.0 **/ hb_face_t * hb_font_get_face (hb_font_t *font) { return font->face; } /** * hb_font_set_funcs: * @font: a font. * @klass: (closure font_data) (destroy destroy) (scope notified): * @font_data: * @destroy: * * * * Since: 1.0 **/ void hb_font_set_funcs (hb_font_t *font, hb_font_funcs_t *klass, void *font_data, hb_destroy_func_t destroy) { if (font->immutable) { if (destroy) destroy (font_data); return; } 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: a font. * @font_data: (destroy destroy) (scope notified): * @destroy: * * * * Since: 1.0 **/ void hb_font_set_funcs_data (hb_font_t *font, void *font_data, hb_destroy_func_t destroy) { /* Destroy user_data? */ if (font->immutable) { if (destroy) destroy (font_data); return; } if (font->destroy) font->destroy (font->user_data); font->user_data = font_data; font->destroy = destroy; } /** * hb_font_set_scale: * @font: a font. * @x_scale: * @y_scale: * * * * Since: 1.0 **/ void hb_font_set_scale (hb_font_t *font, int x_scale, int y_scale) { if (font->immutable) return; font->x_scale = x_scale; font->y_scale = y_scale; } /** * hb_font_get_scale: * @font: a font. * @x_scale: (out): * @y_scale: (out): * * * * Since: 1.0 **/ 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: a font. * @x_ppem: * @y_ppem: * * * * Since: 1.0 **/ void hb_font_set_ppem (hb_font_t *font, unsigned int x_ppem, unsigned int y_ppem) { if (font->immutable) return; font->x_ppem = x_ppem; font->y_ppem = y_ppem; } /** * hb_font_get_ppem: * @font: a font. * @x_ppem: (out): * @y_ppem: (out): * * * * Since: 1.0 **/ 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; }