2 * Copyright (C) 2009 Red Hat, Inc.
3 * Copyright (C) 2009 Keith Stribley <devel@thanlwinsoft.org>
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.h"
32 #include "hb-font-private.h"
34 #include FT_TRUETYPE_TABLES_H
37 hb_ft_get_glyph (hb_font_t *font HB_GNUC_UNUSED,
38 hb_face_t *face HB_GNUC_UNUSED,
39 const void *user_data,
40 hb_codepoint_t unicode,
41 hb_codepoint_t variation_selector)
43 FT_Face ft_face = (FT_Face) user_data;
45 #ifdef HAVE_FT_FACE_GETCHARVARIANTINDEX
46 if (HB_UNLIKELY (variation_selector)) {
47 hb_codepoint_t glyph = FT_Face_GetCharVariantIndex (ft_face, unicode, variation_selector);
53 return FT_Get_Char_Index (ft_face, unicode);
57 hb_ft_get_contour_point (hb_font_t *font HB_GNUC_UNUSED,
58 hb_face_t *face HB_GNUC_UNUSED,
59 const void *user_data,
60 unsigned int point_index,
65 FT_Face ft_face = (FT_Face) user_data;
66 int load_flags = FT_LOAD_DEFAULT;
68 /* TODO: load_flags, embolden, etc */
70 if (HB_UNLIKELY (FT_Load_Glyph (ft_face, glyph, load_flags)))
73 if (HB_UNLIKELY (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE))
76 if (HB_UNLIKELY (point_index >= (unsigned int) ft_face->glyph->outline.n_points))
79 *x = ft_face->glyph->outline.points[point_index].x;
80 *y = ft_face->glyph->outline.points[point_index].y;
86 hb_ft_get_glyph_metrics (hb_font_t *font HB_GNUC_UNUSED,
87 hb_face_t *face HB_GNUC_UNUSED,
88 const void *user_data,
90 hb_glyph_metrics_t *metrics)
92 FT_Face ft_face = (FT_Face) user_data;
93 int load_flags = FT_LOAD_DEFAULT;
95 /* TODO: load_flags, embolden, etc */
97 metrics->x_advance = metrics->y_advance = 0;
98 metrics->x_offset = metrics->y_offset = 0;
99 metrics->width = metrics->height = 0;
100 if (HB_LIKELY (!FT_Load_Glyph (ft_face, glyph, load_flags)))
102 /* TODO: A few negations should be in order here, not sure. */
103 metrics->x_advance = ft_face->glyph->advance.x;
104 metrics->y_advance = ft_face->glyph->advance.y;
105 metrics->x_offset = ft_face->glyph->metrics.horiBearingX;
106 metrics->y_offset = ft_face->glyph->metrics.horiBearingY;
107 metrics->width = ft_face->glyph->metrics.width;
108 metrics->height = ft_face->glyph->metrics.height;
113 hb_ft_get_kerning (hb_font_t *font HB_GNUC_UNUSED,
114 hb_face_t *face HB_GNUC_UNUSED,
115 const void *user_data,
116 hb_codepoint_t first_glyph,
117 hb_codepoint_t second_glyph)
119 FT_Face ft_face = (FT_Face) user_data;
122 /* TODO: Kern type? */
123 if (FT_Get_Kerning (ft_face, first_glyph, second_glyph, FT_KERNING_DEFAULT, &kerning))
129 static hb_font_funcs_t ft_ffuncs = {
130 HB_REFERENCE_COUNT_INVALID, /* ref_count */
132 TRUE, /* immutable */
135 hb_ft_get_contour_point,
136 hb_ft_get_glyph_metrics,
141 hb_ft_get_font_funcs (void)
148 _get_table (hb_tag_t tag, void *user_data)
150 FT_Face ft_face = (FT_Face) user_data;
155 error = FT_Load_Sfnt_Table (ft_face, tag, 0, NULL, &length);
157 return hb_blob_create_empty ();
159 /* TODO Use FT_Memory? */
160 buffer = malloc (length);
162 return hb_blob_create_empty ();
164 error = FT_Load_Sfnt_Table (ft_face, tag, 0, buffer, &length);
166 return hb_blob_create_empty ();
168 return hb_blob_create ((const char *) buffer, length,
169 HB_MEMORY_MODE_WRITABLE,
175 hb_ft_face_create (FT_Face ft_face,
176 hb_destroy_func_t destroy)
180 if (ft_face->stream->read == NULL) {
183 blob = hb_blob_create ((const char *) ft_face->stream->base,
184 (unsigned int) ft_face->stream->size,
185 /* TODO: Check FT_FACE_FLAG_EXTERNAL_STREAM? */
186 HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE,
188 face = hb_face_create_for_data (blob, ft_face->face_index);
189 hb_blob_destroy (blob);
191 face = hb_face_create_for_tables (_get_table, destroy, ft_face);
198 hb_ft_face_finalize (FT_Face ft_face)
200 hb_face_destroy (ft_face->generic.data);
204 hb_ft_face_create_cached (FT_Face ft_face)
206 if (HB_UNLIKELY (!ft_face->generic.data || ft_face->generic.finalizer != (FT_Generic_Finalizer) hb_ft_face_finalize))
208 if (ft_face->generic.finalizer)
209 ft_face->generic.finalizer (ft_face);
211 ft_face->generic.data = hb_ft_face_create (ft_face, NULL);
212 ft_face->generic.finalizer = (FT_Generic_Finalizer) hb_ft_face_finalize;
215 return hb_face_reference (ft_face->generic.data);
220 hb_ft_font_create (FT_Face ft_face,
221 hb_destroy_func_t destroy)
225 font = hb_font_create ();
226 hb_font_set_funcs (font,
227 hb_ft_get_font_funcs (),
229 hb_font_set_scale (font,
230 ft_face->size->metrics.x_scale,
231 ft_face->size->metrics.y_scale);
232 hb_font_set_ppem (font,
233 ft_face->size->metrics.x_ppem,
234 ft_face->size->metrics.y_ppem);