2 * Copyright © 2011 Google, Inc.
4 * This is part of HarfBuzz, a text shaping library.
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 * Google Author(s): Behdad Esfahbod
27 #include "hb-font-private.hh" /* Shall be first since may include windows.h */
29 #include "hb-open-type-private.hh"
31 #include "hb-ot-hhea-table.hh"
32 #include "hb-ot-hmtx-table.hh"
43 const struct hhea *hhea;
49 _hb_tt_font_create (hb_font_t *font)
51 /* TODO Remove this object altogether */
52 hb_tt_font_t *tt = (hb_tt_font_t *) calloc (1, sizeof (hb_tt_font_t));
54 tt->hhea_blob = Sanitizer<hhea>::sanitize (hb_face_reference_table (font->face, HB_OT_TAG_hhea));
55 tt->hhea = Sanitizer<hhea>::lock_instance (tt->hhea_blob);
61 _hb_tt_font_destroy (hb_tt_font_t *tt)
63 hb_blob_destroy (tt->hhea_blob);
68 static inline const hhea&
69 _get_hhea (hb_face_t *face)
71 // return likely (face->tt && face->tt->hhea) ? *face->tt->hhea : Null(hhea);
80 hb_font_get_glyph_nil (hb_font_t *font HB_UNUSED,
81 void *font_data HB_UNUSED,
82 hb_codepoint_t unicode,
83 hb_codepoint_t variation_selector,
84 hb_codepoint_t *glyph,
85 void *user_data HB_UNUSED)
88 return hb_font_get_glyph (font->parent, unicode, variation_selector, glyph);
95 hb_font_get_glyph_h_advance_nil (hb_font_t *font HB_UNUSED,
96 void *font_data HB_UNUSED,
98 void *user_data HB_UNUSED)
101 return font->parent_scale_x_distance (hb_font_get_glyph_h_advance (font->parent, glyph));
103 return font->x_scale;
107 hb_font_get_glyph_v_advance_nil (hb_font_t *font HB_UNUSED,
108 void *font_data HB_UNUSED,
109 hb_codepoint_t glyph,
110 void *user_data HB_UNUSED)
113 return font->parent_scale_y_distance (hb_font_get_glyph_v_advance (font->parent, glyph));
115 return font->y_scale;
119 hb_font_get_glyph_h_origin_nil (hb_font_t *font HB_UNUSED,
120 void *font_data HB_UNUSED,
121 hb_codepoint_t glyph,
124 void *user_data HB_UNUSED)
127 hb_bool_t ret = hb_font_get_glyph_h_origin (font->parent,
131 font->parent_scale_position (x, y);
140 hb_font_get_glyph_v_origin_nil (hb_font_t *font HB_UNUSED,
141 void *font_data HB_UNUSED,
142 hb_codepoint_t glyph,
145 void *user_data HB_UNUSED)
148 hb_bool_t ret = hb_font_get_glyph_v_origin (font->parent,
152 font->parent_scale_position (x, y);
161 hb_font_get_glyph_h_kerning_nil (hb_font_t *font HB_UNUSED,
162 void *font_data HB_UNUSED,
163 hb_codepoint_t left_glyph,
164 hb_codepoint_t right_glyph,
165 void *user_data HB_UNUSED)
168 return font->parent_scale_x_distance (hb_font_get_glyph_h_kerning (font->parent, left_glyph, right_glyph));
174 hb_font_get_glyph_v_kerning_nil (hb_font_t *font HB_UNUSED,
175 void *font_data HB_UNUSED,
176 hb_codepoint_t top_glyph,
177 hb_codepoint_t bottom_glyph,
178 void *user_data HB_UNUSED)
181 return font->parent_scale_y_distance (hb_font_get_glyph_v_kerning (font->parent, top_glyph, bottom_glyph));
187 hb_font_get_glyph_extents_nil (hb_font_t *font HB_UNUSED,
188 void *font_data HB_UNUSED,
189 hb_codepoint_t glyph,
190 hb_glyph_extents_t *extents,
191 void *user_data HB_UNUSED)
194 hb_bool_t ret = hb_font_get_glyph_extents (font->parent,
198 font->parent_scale_position (&extents->x_bearing, &extents->y_bearing);
199 font->parent_scale_distance (&extents->width, &extents->height);
204 memset (extents, 0, sizeof (*extents));
209 hb_font_get_glyph_contour_point_nil (hb_font_t *font HB_UNUSED,
210 void *font_data HB_UNUSED,
211 hb_codepoint_t glyph,
212 unsigned int point_index,
215 void *user_data HB_UNUSED)
218 hb_bool_t ret = hb_font_get_glyph_contour_point (font->parent,
222 font->parent_scale_position (x, y);
231 static hb_font_funcs_t _hb_font_funcs_nil = {
232 HB_OBJECT_HEADER_STATIC,
234 true, /* immutable */
237 #define HB_FONT_FUNC_IMPLEMENT(name) hb_font_get_##name##_nil,
238 HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
239 #undef HB_FONT_FUNC_IMPLEMENT