2 * Copyright © 2009 Red Hat, Inc.
3 * Copyright © 2009 Keith Stribley
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
28 #include "hb-private.hh"
32 #include "hb-font-private.hh"
34 #include FT_TRUETYPE_TABLES_H
40 hb_ft_get_contour_point (hb_font_t *font HB_UNUSED,
43 unsigned int point_index,
46 void *user_data HB_UNUSED)
48 FT_Face ft_face = (FT_Face) font_data;
49 int load_flags = FT_LOAD_DEFAULT;
51 /* TODO: load_flags, embolden, etc */
53 if (unlikely (FT_Load_Glyph (ft_face, glyph, load_flags)))
56 if (unlikely (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE))
59 if (unlikely (point_index >= (unsigned int) ft_face->glyph->outline.n_points))
62 *x = ft_face->glyph->outline.points[point_index].x;
63 *y = ft_face->glyph->outline.points[point_index].y;
69 hb_ft_get_glyph_advance (hb_font_t *font HB_UNUSED,
72 hb_position_t *x_advance,
73 hb_position_t *y_advance,
74 void *user_data HB_UNUSED)
76 FT_Face ft_face = (FT_Face) font_data;
77 int load_flags = FT_LOAD_DEFAULT;
79 /* TODO: load_flags, embolden, etc */
81 if (likely (!FT_Load_Glyph (ft_face, glyph, load_flags)))
83 *x_advance = ft_face->glyph->advance.x;
84 *y_advance = ft_face->glyph->advance.y;
89 hb_ft_get_glyph_extents (hb_font_t *font HB_UNUSED,
92 hb_glyph_extents_t *extents,
93 void *user_data HB_UNUSED)
95 FT_Face ft_face = (FT_Face) font_data;
96 int load_flags = FT_LOAD_DEFAULT;
98 /* TODO: load_flags, embolden, etc */
100 if (likely (!FT_Load_Glyph (ft_face, glyph, load_flags)))
102 /* XXX: A few negations should be in order here, not sure. */
103 extents->x_bearing = ft_face->glyph->metrics.horiBearingX;
104 extents->y_bearing = ft_face->glyph->metrics.horiBearingY;
105 extents->width = ft_face->glyph->metrics.width;
106 extents->height = ft_face->glyph->metrics.height;
111 hb_ft_get_glyph (hb_font_t *font HB_UNUSED,
113 hb_codepoint_t unicode,
114 hb_codepoint_t variation_selector,
115 hb_codepoint_t *glyph,
116 void *user_data HB_UNUSED)
119 FT_Face ft_face = (FT_Face) font_data;
121 #ifdef HAVE_FT_FACE_GETCHARVARIANTINDEX
122 if (unlikely (variation_selector)) {
123 *glyph = FT_Face_GetCharVariantIndex (ft_face, unicode, variation_selector);
129 *glyph = FT_Get_Char_Index (ft_face, unicode);
134 hb_ft_get_kerning (hb_font_t *font HB_UNUSED,
136 hb_codepoint_t left_glyph,
137 hb_codepoint_t right_glyph,
138 hb_position_t *x_kern,
139 hb_position_t *y_kern,
140 void *user_data HB_UNUSED)
142 FT_Face ft_face = (FT_Face) font_data;
145 /* TODO: Kern type? */
146 if (FT_Get_Kerning (ft_face, left_glyph, right_glyph, FT_KERNING_DEFAULT, &kerning))
153 static hb_font_funcs_t ft_ffuncs = {
154 HB_OBJECT_HEADER_STATIC,
156 TRUE, /* immutable */
159 hb_ft_get_contour_point,
160 hb_ft_get_glyph_advance,
161 hb_ft_get_glyph_extents,
168 hb_ft_get_font_funcs (void)
175 get_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
177 FT_Face ft_face = (FT_Face) user_data;
182 if (unlikely (tag == HB_TAG_NONE))
185 error = FT_Load_Sfnt_Table (ft_face, tag, 0, NULL, &length);
189 buffer = (FT_Byte *) malloc (length);
193 error = FT_Load_Sfnt_Table (ft_face, tag, 0, buffer, &length);
197 return hb_blob_create ((const char *) buffer, length,
198 HB_MEMORY_MODE_WRITABLE,
204 hb_ft_face_create (FT_Face ft_face,
205 hb_destroy_func_t destroy)
209 if (ft_face->stream->read == NULL) {
212 blob = hb_blob_create ((const char *) ft_face->stream->base,
213 (unsigned int) ft_face->stream->size,
214 /* TODO: Check FT_FACE_FLAG_EXTERNAL_STREAM? */
215 HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE,
217 face = hb_face_create (blob, ft_face->face_index);
218 hb_blob_destroy (blob);
220 face = hb_face_create_for_tables (get_table, ft_face, destroy);
227 hb_ft_face_finalize (FT_Face ft_face)
229 hb_face_destroy ((hb_face_t *) ft_face->generic.data);
233 hb_ft_face_create_cached (FT_Face ft_face)
235 if (unlikely (!ft_face->generic.data || ft_face->generic.finalizer != (FT_Generic_Finalizer) hb_ft_face_finalize))
237 if (ft_face->generic.finalizer)
238 ft_face->generic.finalizer (ft_face);
240 ft_face->generic.data = hb_ft_face_create (ft_face, NULL);
241 ft_face->generic.finalizer = (FT_Generic_Finalizer) hb_ft_face_finalize;
244 return hb_face_reference ((hb_face_t *) ft_face->generic.data);
249 hb_ft_font_create (FT_Face ft_face,
250 hb_destroy_func_t destroy)
255 face = hb_ft_face_create (ft_face, destroy);
256 font = hb_font_create (face);
257 hb_face_destroy (face);
258 hb_font_set_funcs (font,
259 hb_ft_get_font_funcs (),
261 hb_font_set_scale (font,
262 ((uint64_t) ft_face->size->metrics.x_scale * (uint64_t) ft_face->units_per_EM) >> 16,
263 ((uint64_t) ft_face->size->metrics.y_scale * (uint64_t) ft_face->units_per_EM) >> 16);
264 hb_font_set_ppem (font,
265 ft_face->size->metrics.x_ppem,
266 ft_face->size->metrics.y_ppem);