hb-buffer-private.hh revision 89e2834dabd2d17f2823c51fe3a7fcadeaba7a59
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_H 29#define HB_BUFFER_PRIVATE_H 30 31#include "hb-private.h" 32#include "hb-buffer.h" 33#include "hb-unicode-private.h" 34 35HB_BEGIN_DECLS 36 37#define HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN 0xFFFF 38 39 40typedef struct _hb_internal_glyph_info_t { 41 hb_codepoint_t codepoint; 42 hb_mask_t mask; 43 uint32_t cluster; 44 uint16_t component; 45 uint16_t lig_id; 46 uint32_t gproperty; 47} hb_internal_glyph_info_t; 48 49typedef 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; 59 60ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_internal_glyph_info_t)); 61ASSERT_STATIC (sizeof (hb_glyph_position_t) == sizeof (hb_internal_glyph_position_t)); 62ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t)); 63 64 65 66HB_INTERNAL void 67_hb_buffer_swap (hb_buffer_t *buffer); 68 69HB_INTERNAL void 70_hb_buffer_clear_output (hb_buffer_t *buffer); 71 72HB_INTERNAL void 73_hb_buffer_add_output_glyphs (hb_buffer_t *buffer, 74 unsigned int num_in, 75 unsigned int num_out, 76 const hb_codepoint_t *glyph_data, 77 unsigned short component, 78 unsigned short ligID); 79 80HB_INTERNAL void 81_hb_buffer_add_output_glyphs_be16 (hb_buffer_t *buffer, 82 unsigned int num_in, 83 unsigned int num_out, 84 const uint16_t *glyph_data_be, 85 unsigned short component, 86 unsigned short ligID); 87 88HB_INTERNAL void 89_hb_buffer_add_output_glyph (hb_buffer_t *buffer, 90 hb_codepoint_t glyph_index, 91 unsigned short component, 92 unsigned short ligID); 93 94HB_INTERNAL void 95_hb_buffer_next_glyph (hb_buffer_t *buffer); 96 97 98 99struct _hb_buffer_t { 100 hb_reference_count_t ref_count; 101 102 /* Information about how the text in the buffer should be treated */ 103 hb_unicode_funcs_t *unicode; 104 hb_direction_t direction; 105 hb_script_t script; 106 hb_language_t language; 107 108 /* Buffer contents */ 109 110 unsigned int allocated; 111 112 hb_bool_t have_output; /* whether we have an output buffer going on */ 113 hb_bool_t have_positions; /* whether we have positions */ 114 unsigned int in_length; 115 unsigned int out_length; 116 unsigned int in_pos; 117 unsigned int out_pos; /* out_length and out_pos are actually always the same */ 118 119 hb_internal_glyph_info_t *in_string; 120 hb_internal_glyph_info_t *out_string; 121 hb_internal_glyph_position_t *positions; 122 123 /* Other stuff */ 124 125 unsigned int max_lig_id; 126 127 128 /* Methods */ 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); } 150}; 151 152 153 154#ifndef BUFFER 155#define BUFFER buffer 156#endif 157 158/* convenience macros */ 159#define IN_GLYPH(pos) (BUFFER->in_string[(pos)].codepoint) 160#define IN_INFO(pos) (&BUFFER->in_string[(pos)]) 161#define IN_CURGLYPH() (BUFFER->in_string[BUFFER->in_pos].codepoint) 162#define IN_NEXTGLYPH() (BUFFER->in_string[BUFFER->in_pos + 1].codepoint) 163#define IN_CURINFO() (&BUFFER->in_string[BUFFER->in_pos]) 164#define IN_MASK(pos) (BUFFER->in_string[(pos)].mask) 165#define IN_CLUSTER(pos) (BUFFER->in_string[(pos)].cluster) 166 167HB_END_DECLS 168 169#endif /* HB_BUFFER_PRIVATE_H */ 170