1 /* 2 * Copyright (C) 1998-2004 David Turner and Werner Lemberg 3 * Copyright (C) 2004,2007 Red Hat, Inc. 4 * 5 * This is part of HarfBuzz, an OpenType Layout engine 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 HARFBUZZ_BUFFER_H 29 #define HARFBUZZ_BUFFER_H 30 31 #include "harfbuzz-global.h" 32 33 HB_BEGIN_HEADER 34 35 typedef struct HB_GlyphItemRec_ { 36 HB_UInt gindex; 37 HB_UInt properties; 38 HB_UInt cluster; 39 HB_UShort component; 40 HB_UShort ligID; 41 HB_UShort gproperties; 42 } HB_GlyphItemRec, *HB_GlyphItem; 43 44 typedef struct HB_PositionRec_ { 45 HB_Fixed x_pos; 46 HB_Fixed y_pos; 47 HB_Fixed x_advance; 48 HB_Fixed y_advance; 49 HB_UShort back; /* number of glyphs to go back 50 for drawing current glyph */ 51 HB_Short cursive_chain; /* character to which this connects, 52 may be positive or negative; used 53 only internally */ 54 HB_Bool new_advance; /* if set, the advance width values are 55 absolute, i.e., they won't be 56 added to the original glyph's value 57 but rather replace them. */ 58 } HB_PositionRec, *HB_Position; 59 60 61 typedef struct HB_BufferRec_{ 62 HB_UInt allocated; 63 64 HB_UInt in_length; 65 HB_UInt out_length; 66 HB_UInt in_pos; 67 HB_UInt out_pos; 68 69 HB_GlyphItem in_string; 70 HB_GlyphItem out_string; 71 HB_GlyphItem alt_string; 72 HB_Position positions; 73 HB_UShort max_ligID; 74 HB_Bool separate_out; 75 } HB_BufferRec, *HB_Buffer; 76 77 HB_Error 78 hb_buffer_new( HB_Buffer *buffer ); 79 80 void 81 hb_buffer_free( HB_Buffer buffer ); 82 83 void 84 hb_buffer_clear( HB_Buffer buffer ); 85 86 HB_Error 87 hb_buffer_add_glyph( HB_Buffer buffer, 88 HB_UInt glyph_index, 89 HB_UInt properties, 90 HB_UInt cluster ); 91 92 HB_END_HEADER 93 94 #endif /* HARFBUZZ_BUFFER_H */ 95