2 * Copyright © 2009 Red Hat, Inc.
3 * Copyright © 2011 Google, Inc.
5 * This is part of HarfBuzz, a text shaping library.
7 * Permission is hereby granted, without written agreement and without
8 * license or royalty fees, to use, copy, modify, and distribute this
9 * software and its documentation for any purpose, provided that the
10 * above copyright notice and the following two paragraphs appear in
11 * all copies of this software.
13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
25 * Red Hat Author(s): Behdad Esfahbod
26 * Google Author(s): Behdad Esfahbod
29 #ifndef HB_FONT_PRIVATE_HH
30 #define HB_FONT_PRIVATE_HH
32 #include "hb-private.hh"
35 #include "hb-object-private.hh"
44 struct _hb_font_funcs_t {
45 hb_object_header_t header;
49 /* Don't access these directly. Call hb_font_get_*() instead. */
52 hb_font_get_contour_point_func_t contour_point;
53 hb_font_get_glyph_advance_func_t glyph_advance;
54 hb_font_get_glyph_extents_func_t glyph_extents;
55 hb_font_get_glyph_func_t glyph;
56 hb_font_get_kerning_func_t kerning;
68 hb_destroy_func_t contour_point;
69 hb_destroy_func_t glyph_advance;
70 hb_destroy_func_t glyph_extents;
71 hb_destroy_func_t glyph;
72 hb_destroy_func_t kerning;
82 hb_object_header_t header;
86 hb_get_table_func_t get_table;
88 hb_destroy_func_t destroy;
90 struct hb_ot_layout_t *ot_layout;
101 hb_object_header_t header;
114 hb_font_funcs_t *klass;
116 hb_destroy_func_t destroy;
119 /* Convert from font-space to user-space */
120 inline hb_position_t em_scale_x (int16_t v) { return em_scale (v, this->x_scale); }
121 inline hb_position_t em_scale_y (int16_t v) { return em_scale (v, this->y_scale); }
123 /* Convert from parent-font user-space to our user-space */
124 inline hb_position_t parent_scale_x_distance (hb_position_t v) {
125 if (unlikely (parent && parent->x_scale != x_scale))
126 return v * (int64_t) this->x_scale / this->parent->x_scale;
129 inline hb_position_t parent_scale_y_distance (hb_position_t v) {
130 if (unlikely (parent && parent->y_scale != y_scale))
131 return v * (int64_t) this->y_scale / this->parent->y_scale;
134 inline hb_position_t parent_scale_x_position (hb_position_t v) {
135 return parent_scale_x_distance (v); /* We don't have translation right now */
137 inline hb_position_t parent_scale_y_position (hb_position_t v) {
138 return parent_scale_y_distance (v); /* We don't have translation right now */
141 inline void parent_scale_distance (hb_position_t *x, hb_position_t *y) {
142 *x = parent_scale_x_distance (*x);
143 *y = parent_scale_y_distance (*y);
145 inline void parent_scale_position (hb_position_t *x, hb_position_t *y) {
146 *x = parent_scale_x_position (*x);
147 *y = parent_scale_y_position (*y);
152 inline hb_position_t em_scale (int16_t v, int scale) { return v * (int64_t) scale / this->face->upem; }
158 #endif /* HB_FONT_PRIVATE_HH */