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
35#ifdef HB_USE_PACKED_STRUCTS
36#pragma pack(push, 1)
37#endif
38
39typedef struct HB_GlyphItemRec_ {
40  HB_UInt     gindex;
41  HB_UInt     properties;
42  HB_UInt     cluster;
43  HB_UShort   component;
44  HB_UShort   ligID;
45  HB_UShort   gproperties;
46} HB_GlyphItemRec, *HB_GlyphItem;
47
48typedef struct HB_PositionRec_ {
49  HB_Fixed   x_pos;
50  HB_Fixed   y_pos;
51  HB_Fixed   x_advance;
52  HB_Fixed   y_advance;
53  HB_UShort  back;            /* number of glyphs to go back
54				 for drawing current glyph   */
55  HB_Short  cursive_chain;   /* character to which this connects,
56				 may be positive or negative; used
57				 only internally                     */
58  HB_Bool    new_advance;     /* if set, the advance width values are
59				 absolute, i.e., they won't be
60				 added to the original glyph's value
61				 but rather replace them.            */
62} HB_PositionRec, *HB_Position;
63
64
65typedef struct HB_BufferRec_{
66  HB_UInt    allocated;
67
68  HB_UInt    in_length;
69  HB_UInt    out_length;
70  HB_UInt    in_pos;
71  HB_UInt    out_pos;
72
73  HB_GlyphItem  in_string;
74  HB_GlyphItem  out_string;
75  HB_GlyphItem  alt_string;
76  HB_Position   positions;
77  HB_UShort      max_ligID;
78  HB_Bool       separate_out;
79} HB_BufferRec, *HB_Buffer;
80
81HB_Error
82hb_buffer_new( HB_Buffer *buffer );
83
84void
85hb_buffer_free( HB_Buffer buffer );
86
87void
88hb_buffer_clear( HB_Buffer buffer );
89
90HB_Error
91hb_buffer_add_glyph( HB_Buffer buffer,
92		      HB_UInt    glyph_index,
93		      HB_UInt    properties,
94		      HB_UInt    cluster );
95
96#ifdef HB_USE_PACKED_STRUCTS
97#pragma pack(pop)
98#endif
99
100HB_END_HEADER
101
102#endif /* HARFBUZZ_BUFFER_H */
103