2 * Copyright © 1998-2004 David Turner and Werner Lemberg
3 * Copyright © 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_HH
29 #define HB_BUFFER_PRIVATE_HH
31 #include "hb-private.hh"
32 #include "hb-buffer.h"
33 #include "hb-object-private.hh"
34 #include "hb-unicode-private.hh"
39 ASSERT_STATIC (sizeof (hb_glyph_info_t) == 20);
40 ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t));
42 typedef struct _hb_segment_properties_t {
43 hb_direction_t direction;
45 hb_language_t language;
46 } hb_segment_properties_t;
50 _hb_buffer_swap (hb_buffer_t *buffer);
53 _hb_buffer_clear_output (hb_buffer_t *buffer);
56 _hb_buffer_clear_positions (hb_buffer_t *buffer);
59 _hb_buffer_replace_glyphs_be16 (hb_buffer_t *buffer,
62 const uint16_t *glyph_data_be);
65 _hb_buffer_replace_glyph (hb_buffer_t *buffer,
66 hb_codepoint_t glyph_index);
69 _hb_buffer_output_glyph (hb_buffer_t *buffer,
70 hb_codepoint_t glyph_index);
73 _hb_buffer_skip_glyph (hb_buffer_t *buffer);
76 _hb_buffer_next_glyph (hb_buffer_t *buffer);
80 _hb_buffer_reset_masks (hb_buffer_t *buffer,
84 _hb_buffer_add_masks (hb_buffer_t *buffer,
88 _hb_buffer_set_masks (hb_buffer_t *buffer,
91 unsigned int cluster_start,
92 unsigned int cluster_end);
96 hb_object_header_t header;
98 /* Information about how the text in the buffer should be treated */
100 hb_unicode_funcs_t *unicode; /* Unicode functions */
101 hb_segment_properties_t props; /* Script, language, direction */
103 /* Buffer contents */
105 bool in_error; /* Allocation failed */
106 bool have_output; /* Whether we have an output buffer going on */
107 bool have_positions; /* Whether we have positions */
109 unsigned int i; /* Cursor into ->info and ->pos arrays */
110 unsigned int len; /* Length of ->info and ->pos arrays */
111 unsigned int out_len; /* Length of ->out array if have_output */
115 unsigned int allocated; /* Length of allocated arrays */
116 hb_glyph_info_t *info;
117 hb_glyph_info_t *out_info;
118 hb_glyph_position_t *pos;
122 inline unsigned int backtrack_len (void) const
123 { return this->have_output? this->out_len : this->i; }
124 inline unsigned int next_serial (void) { return serial++; }
125 inline void swap (void) { _hb_buffer_swap (this); }
126 inline void clear_output (void) { _hb_buffer_clear_output (this); }
127 inline void clear_positions (void) { _hb_buffer_clear_positions (this); }
128 inline void next_glyph (void) { _hb_buffer_next_glyph (this); }
129 inline void replace_glyphs_be16 (unsigned int num_in,
130 unsigned int num_out,
131 const uint16_t *glyph_data_be)
132 { _hb_buffer_replace_glyphs_be16 (this, num_in, num_out, glyph_data_be); }
133 inline void replace_glyph (hb_codepoint_t glyph_index)
134 { _hb_buffer_replace_glyph (this, glyph_index); }
135 inline void output_glyph (hb_codepoint_t glyph_index)
136 { _hb_buffer_output_glyph (this, glyph_index); }
137 inline void skip_glyph (void) { _hb_buffer_skip_glyph (this); }
139 inline void reset_masks (hb_mask_t mask)
141 for (unsigned int j = 0; j < len; j++)
144 inline void add_masks (hb_mask_t mask)
146 for (unsigned int j = 0; j < len; j++)
147 info[j].mask |= mask;
149 inline void set_masks (hb_mask_t value,
151 unsigned int cluster_start,
152 unsigned int cluster_end)
153 { _hb_buffer_set_masks (this, value, mask, cluster_start, cluster_end); }
159 #endif /* HB_BUFFER_PRIVATE_HH */