harfbuzz-buffer.h revision 5569331642446be05292e3e1f8a51218827168cd 
1/*
2 * Copyright (C) 1998-2004  David Turner and Werner Lemberg
3 * Copyright (C) 2004,2007  Red Hat, Inc.
4 *
5 * This is part of HarfBuzz, an OpenType Layout engine library.
6 *
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.
12 *
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
17 * DAMAGE.
18 *
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.
24 *
25 * Red Hat Author(s): Owen Taylor, Behdad Esfahbod
26 */
27
28#ifndef HARFBUZZ_BUFFER_H
29#define HARFBUZZ_BUFFER_H
30
31#include "harfbuzz-global.h"
32
33HB_BEGIN_HEADER
34
35typedef struct HB_GlyphItemRec_ {
36  HB_UInt     gindex;
37  HB_UInt     properties;
38  HB_UInt     cluster;
39  HB_UShort   component;
40  HB_UShort   ligID;
41  HB_UShort   gproperties;
42} HB_GlyphItemRec, *HB_GlyphItem;
43
44typedef struct HB_PositionRec_ {
45  HB_Fixed   x_pos;
46  HB_Fixed   y_pos;
47  HB_Fixed   x_advance;
48  HB_Fixed   y_advance;
49  HB_UShort  back;            /* number of glyphs to go back
50				 for drawing current glyph   */
51  HB_Bool    new_advance;     /* if set, the advance width values are
52				 absolute, i.e., they won't be
53				 added to the original glyph's value
54				 but rather replace them.            */
55  HB_Short  cursive_chain;   /* character to which this connects,
56				 may be positive or negative; used
57				 only internally                     */
58} HB_PositionRec, *HB_Position;
59
60
61typedef struct HB_BufferRec_{
62  HB_UInt    allocated;
63
64  HB_UInt    in_length;
65  HB_UInt    out_length;
66  HB_UInt    in_pos;
67  HB_UInt    out_pos;
68
69  HB_Bool       separate_out;
70  HB_GlyphItem  in_string;
71  HB_GlyphItem  out_string;
72  HB_GlyphItem  alt_string;
73  HB_Position   positions;
74  HB_UShort      max_ligID;
75} HB_BufferRec, *HB_Buffer;
76
77HB_Error
78hb_buffer_new( HB_Buffer *buffer );
79
80void
81hb_buffer_free( HB_Buffer buffer );
82
83void
84hb_buffer_clear( HB_Buffer buffer );
85
86HB_Error
87hb_buffer_add_glyph( HB_Buffer buffer,
88		      HB_UInt    glyph_index,
89		      HB_UInt    properties,
90		      HB_UInt    cluster );
91
92HB_END_HEADER
93
94#endif /* HARFBUZZ_BUFFER_H */
95