hb-buffer-private.hh revision fe263272a2b26204bc39829a94d90ab537517f3f
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 35HB_BEGIN_DECLS 36 37 38#define HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN 0xFFFF 39#define component() var1.u16[0] 40#define lig_id() var1.u16[1] 41#define gproperty() var2.u32 42#define back() var.u16[0] /* number of glyphs to go back for drawing current glyph */ 43#define cursive_chain() var.i16[1] /* character to which this connects, may be positive or negative */ 44 45ASSERT_STATIC (sizeof (hb_glyph_info_t) == 20); 46ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t)); 47 48typedef struct _hb_segment_properties_t { 49 hb_direction_t direction; 50 hb_script_t script; 51 hb_language_t language; 52} hb_segment_properties_t; 53 54 55HB_INTERNAL void 56_hb_buffer_swap (hb_buffer_t *buffer); 57 58HB_INTERNAL void 59_hb_buffer_clear_output (hb_buffer_t *buffer); 60 61HB_INTERNAL void 62_hb_buffer_add_output_glyphs (hb_buffer_t *buffer, 63 unsigned int num_in, 64 unsigned int num_out, 65 const hb_codepoint_t *glyph_data); 66 67HB_INTERNAL void 68_hb_buffer_add_output_glyphs_be16 (hb_buffer_t *buffer, 69 unsigned int num_in, 70 unsigned int num_out, 71 const uint16_t *glyph_data_be); 72 73HB_INTERNAL void 74_hb_buffer_add_output_glyph (hb_buffer_t *buffer, 75 hb_codepoint_t glyph_index); 76 77HB_INTERNAL void 78_hb_buffer_next_glyph (hb_buffer_t *buffer); 79 80 81HB_INTERNAL void 82_hb_buffer_reset_masks (hb_buffer_t *buffer, 83 hb_mask_t mask); 84 85HB_INTERNAL void 86_hb_buffer_add_masks (hb_buffer_t *buffer, 87 hb_mask_t mask); 88 89HB_INTERNAL void 90_hb_buffer_set_masks (hb_buffer_t *buffer, 91 hb_mask_t value, 92 hb_mask_t mask, 93 unsigned int cluster_start, 94 unsigned int cluster_end); 95 96 97struct _hb_buffer_t { 98 hb_reference_count_t ref_count; 99 100 /* Information about how the text in the buffer should be treated */ 101 102 hb_unicode_funcs_t *unicode; /* Unicode functions */ 103 hb_segment_properties_t props; /* Script, language, direction */ 104 105 /* Buffer contents */ 106 107 unsigned int allocated; /* Length of allocated arrays */ 108 109 hb_bool_t have_output; /* Whether we have an output buffer going on */ 110 hb_bool_t have_positions; /* Whether we have positions */ 111 hb_bool_t in_error; /* Allocation failed */ 112 113 unsigned int i; /* Cursor into ->info and ->pos arrays */ 114 unsigned int len; /* Length of ->info and ->pos arrays */ 115 unsigned int out_len; /* Length of ->out array */ 116 117 hb_glyph_info_t *info; 118 hb_glyph_info_t *out_info; 119 hb_glyph_position_t *pos; 120 121 /* Other stuff */ 122 123 unsigned int max_lig_id; 124 125 126 /* Methods */ 127 inline unsigned int allocate_lig_id (void) { return max_lig_id++; } 128 inline void swap (void) { _hb_buffer_swap (this); } 129 inline void clear_output (void) { _hb_buffer_clear_output (this); } 130 inline void next_glyph (void) { _hb_buffer_next_glyph (this); } 131 inline void add_output_glyphs (unsigned int num_in, 132 unsigned int num_out, 133 const hb_codepoint_t *glyph_data) 134 { _hb_buffer_add_output_glyphs (this, num_in, num_out, glyph_data); } 135 inline void add_output_glyphs_be16 (unsigned int num_in, 136 unsigned int num_out, 137 const uint16_t *glyph_data_be) 138 { _hb_buffer_add_output_glyphs_be16 (this, num_in, num_out, glyph_data_be); } 139 inline void add_output_glyph (hb_codepoint_t glyph_index) 140 { _hb_buffer_add_output_glyph (this, glyph_index); } 141 inline void replace_glyph (hb_codepoint_t glyph_index) { add_output_glyph (glyph_index); } 142 143 inline void reset_masks (hb_mask_t mask) 144 { 145 for (unsigned int i = 0; i < len; i++) 146 info[i].mask = mask; 147 } 148 inline void add_masks (hb_mask_t mask) 149 { 150 for (unsigned int i = 0; i < len; i++) 151 info[i].mask |= mask; 152 } 153 inline void set_masks (hb_mask_t value, 154 hb_mask_t mask, 155 unsigned int cluster_start, 156 unsigned int cluster_end) 157 { _hb_buffer_set_masks (this, value, mask, cluster_start, cluster_end); } 158 159}; 160 161 162HB_END_DECLS 163 164#endif /* HB_BUFFER_PRIVATE_HH */ 165