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| 1 /* |
| 2 * Copyright (C) 1998-2004 David Turner and Werner Lemberg |
| 3 * Copyright (C) 2004,2007,2009,2010 Red Hat, Inc. |
| 4 * |
| 5 * This is part of HarfBuzz, a text shaping 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 HB_BUFFER_PRIVATE_HH |
| 29 #define HB_BUFFER_PRIVATE_HH |
| 30 |
| 31 #include "hb-private.h" |
| 32 #include "hb-buffer.h" |
| 33 #include "hb-unicode-private.h" |
| 34 |
| 35 HB_BEGIN_DECLS |
| 36 |
| 37 |
| 38 ASSERT_STATIC (sizeof (hb_glyph_info_t) == 20); |
| 39 ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t)); |
| 40 |
| 41 typedef struct _hb_segment_properties_t { |
| 42 hb_direction_t direction; |
| 43 hb_script_t script; |
| 44 hb_language_t language; |
| 45 } hb_segment_properties_t; |
| 46 |
| 47 |
| 48 HB_INTERNAL void |
| 49 _hb_buffer_swap (hb_buffer_t *buffer); |
| 50 |
| 51 HB_INTERNAL void |
| 52 _hb_buffer_clear_output (hb_buffer_t *buffer); |
| 53 |
| 54 HB_INTERNAL void |
| 55 _hb_buffer_replace_glyphs_be16 (hb_buffer_t *buffer, |
| 56 unsigned int num_in, |
| 57 unsigned int num_out, |
| 58 const uint16_t *glyph_data_be); |
| 59 |
| 60 HB_INTERNAL void |
| 61 _hb_buffer_replace_glyph (hb_buffer_t *buffer, |
| 62 hb_codepoint_t glyph_index); |
| 63 |
| 64 HB_INTERNAL void |
| 65 _hb_buffer_next_glyph (hb_buffer_t *buffer); |
| 66 |
| 67 |
| 68 HB_INTERNAL void |
| 69 _hb_buffer_reset_masks (hb_buffer_t *buffer, |
| 70 hb_mask_t mask); |
| 71 |
| 72 HB_INTERNAL void |
| 73 _hb_buffer_add_masks (hb_buffer_t *buffer, |
| 74 hb_mask_t mask); |
| 75 |
| 76 HB_INTERNAL void |
| 77 _hb_buffer_set_masks (hb_buffer_t *buffer, |
| 78 hb_mask_t value, |
| 79 hb_mask_t mask, |
| 80 unsigned int cluster_start, |
| 81 unsigned int cluster_end); |
| 82 |
| 83 |
| 84 struct _hb_buffer_t { |
| 85 hb_reference_count_t ref_count; |
| 86 |
| 87 /* Information about how the text in the buffer should be treated */ |
| 88 |
| 89 hb_unicode_funcs_t *unicode; /* Unicode functions */ |
| 90 hb_segment_properties_t props; /* Script, language, direction */ |
| 91 |
| 92 /* Buffer contents */ |
| 93 |
| 94 unsigned int allocated; /* Length of allocated arrays */ |
| 95 |
| 96 hb_bool_t have_output; /* Whether we have an output buffer going on */ |
| 97 hb_bool_t have_positions; /* Whether we have positions */ |
| 98 hb_bool_t in_error; /* Allocation failed */ |
| 99 |
| 100 unsigned int i; /* Cursor into ->info and ->pos arrays */ |
| 101 unsigned int len; /* Length of ->info and ->pos arrays */ |
| 102 unsigned int out_len; /* Length of ->out array */ |
| 103 |
| 104 hb_glyph_info_t *info; |
| 105 hb_glyph_info_t *out_info; |
| 106 hb_glyph_position_t *pos; |
| 107 |
| 108 /* Other stuff */ |
| 109 |
| 110 unsigned int serial; |
| 111 |
| 112 |
| 113 /* Methods */ |
| 114 inline unsigned int next_serial (void) { return serial++; } |
| 115 inline void swap (void) { _hb_buffer_swap (this); } |
| 116 inline void clear_output (void) { _hb_buffer_clear_output (this); } |
| 117 inline void next_glyph (void) { _hb_buffer_next_glyph (this); } |
| 118 inline void replace_glyphs_be16 (unsigned int num_in, |
| 119 unsigned int num_out, |
| 120 const uint16_t *glyph_data_be) |
| 121 { _hb_buffer_replace_glyphs_be16 (this, num_in, num_out, glyph_data_be); } |
| 122 inline void replace_glyph (hb_codepoint_t glyph_index) |
| 123 { _hb_buffer_replace_glyph (this, glyph_index); } |
| 124 |
| 125 inline void reset_masks (hb_mask_t mask) |
| 126 { |
| 127 for (unsigned int i = 0; i < len; i++) |
| 128 info[i].mask = mask; |
| 129 } |
| 130 inline void add_masks (hb_mask_t mask) |
| 131 { |
| 132 for (unsigned int i = 0; i < len; i++) |
| 133 info[i].mask |= mask; |
| 134 } |
| 135 inline void set_masks (hb_mask_t value, |
| 136 hb_mask_t mask, |
| 137 unsigned int cluster_start, |
| 138 unsigned int cluster_end) |
| 139 { _hb_buffer_set_masks (this, value, mask, cluster_start, cluster_end); } |
| 140 |
| 141 }; |
| 142 |
| 143 |
| 144 HB_END_DECLS |
| 145 |
| 146 #endif /* HB_BUFFER_PRIVATE_HH */ |
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