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_glyph (hb_font_t *font HB_UNUSED,
41 const void *user_data,
42 hb_codepoint_t unicode,
43 hb_codepoint_t variation_selector)
45 FT_Face ft_face = (FT_Face) user_data;
47 #ifdef HAVE_FT_FACE_GETCHARVARIANTINDEX
48 if (unlikely (variation_selector)) {
49 hb_codepoint_t glyph = FT_Face_GetCharVariantIndex (ft_face, unicode, variation_selector);
55 return FT_Get_Char_Index (ft_face, unicode);
59 hb_ft_get_glyph_advance (hb_font_t *font HB_UNUSED,
60 const void *user_data,
62 hb_position_t *x_advance,
63 hb_position_t *y_advance)
65 FT_Face ft_face = (FT_Face) user_data;
66 int load_flags = FT_LOAD_DEFAULT;
68 /* TODO: load_flags, embolden, etc */
70 if (likely (!FT_Load_Glyph (ft_face, glyph, load_flags)))
72 *x_advance = ft_face->glyph->advance.x;
73 *y_advance = ft_face->glyph->advance.y;
78 hb_ft_get_glyph_extents (hb_font_t *font HB_UNUSED,
79 const void *user_data,
81 hb_glyph_extents_t *extents)
83 FT_Face ft_face = (FT_Face) user_data;
84 int load_flags = FT_LOAD_DEFAULT;
86 /* TODO: load_flags, embolden, etc */
88 if (likely (!FT_Load_Glyph (ft_face, glyph, load_flags)))
90 /* XXX: A few negations should be in order here, not sure. */
91 extents->x_bearing = ft_face->glyph->metrics.horiBearingX;
92 extents->y_bearing = ft_face->glyph->metrics.horiBearingY;
93 extents->width = ft_face->glyph->metrics.width;
94 extents->height = ft_face->glyph->metrics.height;
99 hb_ft_get_contour_point (hb_font_t *font HB_UNUSED,
100 const void *user_data,
101 unsigned int point_index,
102 hb_codepoint_t glyph,
106 FT_Face ft_face = (FT_Face) user_data;
107 int load_flags = FT_LOAD_DEFAULT;
109 /* TODO: load_flags, embolden, etc */
111 if (unlikely (FT_Load_Glyph (ft_face, glyph, load_flags)))
114 if (unlikely (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE))
117 if (unlikely (point_index >= (unsigned int) ft_face->glyph->outline.n_points))
120 *x = ft_face->glyph->outline.points[point_index].x;
121 *y = ft_face->glyph->outline.points[point_index].y;
127 hb_ft_get_kerning (hb_font_t *font HB_UNUSED,
128 const void *user_data,
129 hb_codepoint_t first_glyph,
130 hb_codepoint_t second_glyph)
132 FT_Face ft_face = (FT_Face) user_data;
135 /* TODO: Kern type? */
136 if (FT_Get_Kerning (ft_face, first_glyph, second_glyph, FT_KERNING_DEFAULT, &kerning))
142 static hb_font_funcs_t ft_ffuncs = {
143 HB_OBJECT_HEADER_STATIC,
145 TRUE, /* immutable */
148 hb_ft_get_glyph_advance,
149 hb_ft_get_glyph_extents,
150 hb_ft_get_contour_point,
156 hb_ft_get_font_funcs (void)
163 get_table (hb_tag_t tag, void *user_data)
165 FT_Face ft_face = (FT_Face) user_data;
170 if (unlikely (tag == HB_TAG_NONE))
173 error = FT_Load_Sfnt_Table (ft_face, tag, 0, NULL, &length);
177 buffer = (FT_Byte *) malloc (length);
181 error = FT_Load_Sfnt_Table (ft_face, tag, 0, buffer, &length);
185 return hb_blob_create ((const char *) buffer, length,
186 HB_MEMORY_MODE_WRITABLE,
192 hb_ft_face_create (FT_Face ft_face,
193 hb_destroy_func_t destroy)
197 if (ft_face->stream->read == NULL) {
200 blob = hb_blob_create ((const char *) ft_face->stream->base,
201 (unsigned int) ft_face->stream->size,
202 /* TODO: Check FT_FACE_FLAG_EXTERNAL_STREAM? */
203 HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE,
205 face = hb_face_create_for_data (blob, ft_face->face_index);
206 hb_blob_destroy (blob);
208 face = hb_face_create_for_tables (get_table, ft_face, destroy);
215 hb_ft_face_finalize (FT_Face ft_face)
217 hb_face_destroy ((hb_face_t *) ft_face->generic.data);
221 hb_ft_face_create_cached (FT_Face ft_face)
223 if (unlikely (!ft_face->generic.data || ft_face->generic.finalizer != (FT_Generic_Finalizer) hb_ft_face_finalize))
225 if (ft_face->generic.finalizer)
226 ft_face->generic.finalizer (ft_face);
228 ft_face->generic.data = hb_ft_face_create (ft_face, NULL);
229 ft_face->generic.finalizer = (FT_Generic_Finalizer) hb_ft_face_finalize;
232 return hb_face_reference ((hb_face_t *) ft_face->generic.data);
237 hb_ft_font_create (FT_Face ft_face,
238 hb_destroy_func_t destroy)
243 face = hb_ft_face_create (ft_face, destroy);
244 font = hb_font_create (face);
245 hb_face_destroy (face);
246 hb_font_set_funcs (font,
247 hb_ft_get_font_funcs (),
249 hb_font_set_scale (font,
250 ((uint64_t) ft_face->size->metrics.x_scale * (uint64_t) ft_face->units_per_EM) >> 16,
251 ((uint64_t) ft_face->size->metrics.y_scale * (uint64_t) ft_face->units_per_EM) >> 16);
252 hb_font_set_ppem (font,
253 ft_face->size->metrics.x_ppem,
254 ft_face->size->metrics.y_ppem);