2 * Copyright (C) 2007,2008,2009 Red Hat, 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 * Red Hat Author(s): Behdad Esfahbod
27 #ifndef HB_OT_LAYOUT_PRIVATE_HH
28 #define HB_OT_LAYOUT_PRIVATE_HH
30 #include "hb-private.h"
32 #include "hb-ot-layout.h"
33 #include "hb-ot-head-private.hh"
35 #include "hb-font-private.h"
36 #include "hb-buffer-private.hh"
42 #define component() var1.u16[0]
43 #define lig_id() var1.u16[1]
44 #define back() var.u16[0] /* number of glyphs to go back for drawing current glyph */
45 #define cursive_chain() var.i16[1] /* character to which this connects, may be positive or negative */
47 typedef unsigned int hb_ot_layout_class_t;
59 const struct GDEF *gdef;
60 const struct GSUB *gsub;
61 const struct GPOS *gpos;
65 unsigned char *klasses;
70 struct hb_ot_layout_context_t
75 /* Convert from font-space to user-space */
76 inline hb_position_t scale_x (int16_t v) { return scale (v, this->font->x_scale); }
77 inline hb_position_t scale_y (int16_t v) { return scale (v, this->font->y_scale); }
80 inline hb_position_t scale (int16_t v, unsigned int scale) { return v * (int64_t) scale / this->face->head_table->get_upem (); }
84 HB_INTERNAL hb_ot_layout_t *
85 _hb_ot_layout_new (hb_face_t *face);
88 _hb_ot_layout_free (hb_ot_layout_t *layout);
96 _hb_ot_layout_has_new_glyph_classes (hb_face_t *face);
99 _hb_ot_layout_set_glyph_property (hb_face_t *face,
100 hb_codepoint_t glyph,
101 unsigned int property);
104 _hb_ot_layout_set_glyph_class (hb_face_t *face,
105 hb_codepoint_t glyph,
106 hb_ot_layout_glyph_class_t klass);
108 HB_INTERNAL hb_bool_t
109 _hb_ot_layout_check_glyph_property (hb_face_t *face,
110 hb_glyph_info_t *ginfo,
111 unsigned int lookup_flags,
112 unsigned int *property);
114 HB_INTERNAL hb_bool_t
115 _hb_ot_layout_skip_mark (hb_face_t *face,
116 hb_glyph_info_t *ginfo,
117 unsigned int lookup_flags,
118 unsigned int *property);
123 #endif /* HB_OT_LAYOUT_PRIVATE_HH */