2 * Copyright (C) 2009 Red Hat, Inc.
3 * Copyright (C) 2009 Keith Stribley <devel@thanlwinsoft.org>
5 * This is part of HarfBuzz, an OpenType Layout engine 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_face_t *face, const void *user_data,
38 hb_codepoint_t unicode, hb_codepoint_t variation_selector)
40 FT_Face ft_face = (FT_Face) user_data;
42 if (HB_UNLIKELY (variation_selector)) {
43 hb_codepoint_t glyph = FT_Face_GetCharVariantIndex (ft_face, unicode, variation_selector);
48 return FT_Get_Char_Index (ft_face, unicode);
52 hb_ft_get_contour_point (hb_font_t *font, hb_face_t *face, const void *user_data,
53 unsigned int point_index,
54 hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y)
56 FT_Face ft_face = (FT_Face) user_data;
57 int load_flags = FT_LOAD_DEFAULT;
59 /* TODO: load_flags, embolden, etc */
61 if (HB_UNLIKELY (FT_Load_Glyph (ft_face, glyph, load_flags)))
64 if (HB_UNLIKELY (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE))
67 if (HB_UNLIKELY (point_index >= (unsigned int) ft_face->glyph->outline.n_points))
70 *x = ft_face->glyph->outline.points[point_index].x;
71 *y = ft_face->glyph->outline.points[point_index].y;
77 hb_ft_get_glyph_metrics (hb_font_t *font, hb_face_t *face, const void *user_data,
78 hb_codepoint_t glyph, hb_glyph_metrics_t *metrics)
80 FT_Face ft_face = (FT_Face) user_data;
81 int load_flags = FT_LOAD_DEFAULT;
83 /* TODO: load_flags, embolden, etc */
85 metrics->x_advance = metrics->y_advance = 0;
86 metrics->x_offset = metrics->y_offset = 0;
87 metrics->width = metrics->height = 0;
88 if (HB_LIKELY (!FT_Load_Glyph (ft_face, glyph, load_flags)))
90 /* TODO: A few negations should be in order here, not sure. */
91 metrics->x_advance = ft_face->glyph->advance.x;
92 metrics->y_advance = ft_face->glyph->advance.y;
93 metrics->x_offset = ft_face->glyph->metrics.horiBearingX;
94 metrics->y_offset = ft_face->glyph->metrics.horiBearingY;
95 metrics->width = ft_face->glyph->metrics.width;
96 metrics->height = ft_face->glyph->metrics.height;
101 hb_ft_get_kerning (hb_font_t *font, hb_face_t *face, const void *user_data,
102 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph)
104 FT_Face ft_face = (FT_Face) user_data;
107 /* TODO: Kern type? */
108 if (FT_Get_Kerning (ft_face, first_glyph, second_glyph, FT_KERNING_DEFAULT, &kerning))
114 static hb_font_funcs_t ft_ffuncs = {
115 HB_REFERENCE_COUNT_INVALID, /* ref_count */
117 TRUE, /* immutable */
120 hb_ft_get_contour_point,
121 hb_ft_get_glyph_metrics,
126 hb_ft_get_font_funcs (void)
133 _get_table (hb_tag_t tag, void *user_data)
135 FT_Face ft_face = (FT_Face) user_data;
140 error = FT_Load_Sfnt_Table (ft_face, tag, 0, NULL, &length);
142 return hb_blob_create_empty ();
144 /* TODO Use FT_Memory? */
145 buffer = malloc (length);
147 return hb_blob_create_empty ();
149 error = FT_Load_Sfnt_Table (ft_face, tag, 0, buffer, &length);
151 return hb_blob_create_empty ();
153 return hb_blob_create ((const char *) buffer, length,
154 HB_MEMORY_MODE_WRITABLE,
160 hb_ft_face_create (FT_Face ft_face,
161 hb_destroy_func_t destroy)
165 /* TODO: Handle NULL ft_face (in other places too */
166 if (ft_face->stream->base != NULL) {
169 blob = hb_blob_create ((const char *) ft_face->stream->base,
170 (unsigned int) ft_face->stream->size,
171 HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE,
173 face = hb_face_create_for_data (blob, ft_face->face_index);
174 hb_blob_destroy (blob);
176 face = hb_face_create_for_tables (_get_table, destroy, ft_face);
183 hb_ft_face_create_cached (FT_Face ft_face)
185 /* TODO: Not thread-safe */
186 if (HB_UNLIKELY (!ft_face->generic.data || ft_face->generic.finalizer != (FT_Generic_Finalizer) hb_face_destroy))
188 if (ft_face->generic.finalizer)
189 ft_face->generic.finalizer (ft_face->generic.data);
191 ft_face->generic.data = hb_ft_face_create (ft_face, NULL);
192 ft_face->generic.finalizer = (FT_Generic_Finalizer) hb_face_destroy;
195 return hb_face_reference (ft_face->generic.data);
200 hb_ft_font_create (FT_Face ft_face,
201 hb_destroy_func_t destroy)
205 font = hb_font_create ();
206 hb_font_set_funcs (font,
207 hb_ft_get_font_funcs (),
209 hb_font_set_scale (font,
210 ft_face->size->metrics.x_scale,
211 ft_face->size->metrics.y_scale);
212 hb_font_set_ppem (font,
213 ft_face->size->metrics.x_ppem,
214 ft_face->size->metrics.y_ppem);