2 * Copyright (C) 1998-2004 David Turner and Werner Lemberg
3 * Copyright (C) 2004,2007,2009,2010 Red Hat, Inc.
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): Owen Taylor, Behdad Esfahbod
28 #ifndef HB_BUFFER_PRIVATE_H
29 #define HB_BUFFER_PRIVATE_H
31 #include "hb-private.h"
32 #include "hb-buffer.h"
33 #include "hb-unicode-private.h"
37 #define HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN 0xFFFF
40 typedef struct _hb_internal_glyph_info_t {
41 hb_codepoint_t codepoint;
47 } hb_internal_glyph_info_t;
49 typedef struct _hb_internal_glyph_position_t {
50 hb_position_t x_advance;
51 hb_position_t y_advance;
52 hb_position_t x_offset;
53 hb_position_t y_offset;
54 uint32_t back : 16; /* number of glyphs to go back
55 for drawing current glyph */
56 int32_t cursive_chain : 16; /* character to which this connects,
57 may be positive or negative */
58 } hb_internal_glyph_position_t;
60 ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_internal_glyph_info_t));
61 ASSERT_STATIC (sizeof (hb_glyph_position_t) == sizeof (hb_internal_glyph_position_t));
62 ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t));
66 _hb_buffer_swap (hb_buffer_t *buffer);
69 _hb_buffer_clear_output (hb_buffer_t *buffer);
72 _hb_buffer_add_output_glyphs (hb_buffer_t *buffer,
75 const hb_codepoint_t *glyph_data,
76 unsigned short component,
77 unsigned short ligID);
80 _hb_buffer_add_output_glyphs_be16 (hb_buffer_t *buffer,
83 const uint16_t *glyph_data_be,
84 unsigned short component,
85 unsigned short ligID);
88 _hb_buffer_add_output_glyph (hb_buffer_t *buffer,
89 hb_codepoint_t glyph_index,
90 unsigned short component,
91 unsigned short ligID);
94 _hb_buffer_next_glyph (hb_buffer_t *buffer);
99 hb_reference_count_t ref_count;
101 /* Information about how the text in the buffer should be treated */
102 hb_unicode_funcs_t *unicode;
103 hb_direction_t direction;
105 hb_language_t language;
107 /* Buffer contents */
109 unsigned int allocated; /* Length of allocated arrays */
111 hb_bool_t have_output; /* Whether we have an output buffer going on */
112 hb_bool_t have_positions; /* Whether we have positions */
113 hb_bool_t in_error; /* Allocation failed */
115 unsigned int i; /* Cursor into ->info and ->pos arrays */
116 unsigned int len; /* Length of ->info and ->pos arrays */
117 unsigned int out_len; /* Length of ->out array */
119 hb_internal_glyph_info_t *info;
120 hb_internal_glyph_info_t *out_info;
121 hb_internal_glyph_position_t *pos;
125 unsigned int max_lig_id;
129 inline unsigned int allocate_lig_id (void) { return max_lig_id++; }
130 inline void swap (void) { _hb_buffer_swap (this); }
131 inline void clear_output (void) { _hb_buffer_clear_output (this); }
132 inline void next_glyph (void) { _hb_buffer_next_glyph (this); }
133 inline void add_output_glyphs (unsigned int num_in,
134 unsigned int num_out,
135 const hb_codepoint_t *glyph_data,
136 unsigned short component,
137 unsigned short ligID)
138 { _hb_buffer_add_output_glyphs (this, num_in, num_out, glyph_data, component, ligID); }
139 inline void add_output_glyphs_be16 (unsigned int num_in,
140 unsigned int num_out,
141 const uint16_t *glyph_data_be,
142 unsigned short component,
143 unsigned short ligID)
144 { _hb_buffer_add_output_glyphs_be16 (this, num_in, num_out, glyph_data_be, component, ligID); }
145 inline void add_output_glyph (hb_codepoint_t glyph_index,
146 unsigned short component = 0xFFFF,
147 unsigned short ligID = 0xFFFF)
148 { _hb_buffer_add_output_glyph (this, glyph_index, component, ligID); }
149 inline void replace_glyph (hb_codepoint_t glyph_index) { add_output_glyph (glyph_index); }
155 #endif /* HB_BUFFER_PRIVATE_H */