The Android Open Source Project | 049d6fe | 2009-03-03 19:29:31 -0800 | [diff] [blame] | 1 | /***************************************************************************/ |
| 2 | /* */ |
| 3 | /* ftgloadr.h */ |
| 4 | /* */ |
| 5 | /* The FreeType glyph loader (specification). */ |
| 6 | /* */ |
| 7 | /* Copyright 2002, 2003, 2005, 2006 by */ |
| 8 | /* David Turner, Robert Wilhelm, and Werner Lemberg */ |
| 9 | /* */ |
| 10 | /* This file is part of the FreeType project, and may only be used, */ |
| 11 | /* modified, and distributed under the terms of the FreeType project */ |
| 12 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
| 13 | /* this file you indicate that you have read the license and */ |
| 14 | /* understand and accept it fully. */ |
| 15 | /* */ |
| 16 | /***************************************************************************/ |
| 17 | |
| 18 | |
| 19 | #ifndef __FTGLOADR_H__ |
| 20 | #define __FTGLOADR_H__ |
| 21 | |
| 22 | |
| 23 | #include <ft2build.h> |
| 24 | #include FT_FREETYPE_H |
| 25 | |
| 26 | |
| 27 | FT_BEGIN_HEADER |
| 28 | |
| 29 | |
| 30 | /*************************************************************************/ |
| 31 | /* */ |
| 32 | /* <Struct> */ |
| 33 | /* FT_GlyphLoader */ |
| 34 | /* */ |
| 35 | /* <Description> */ |
| 36 | /* The glyph loader is an internal object used to load several glyphs */ |
| 37 | /* together (for example, in the case of composites). */ |
| 38 | /* */ |
| 39 | /* <Note> */ |
| 40 | /* The glyph loader implementation is not part of the high-level API, */ |
| 41 | /* hence the forward structure declaration. */ |
| 42 | /* */ |
| 43 | typedef struct FT_GlyphLoaderRec_* FT_GlyphLoader ; |
| 44 | |
| 45 | |
| 46 | #if 0 /* moved to freetype.h in version 2.2 */ |
| 47 | #define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS 1 |
| 48 | #define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES 2 |
| 49 | #define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID 4 |
| 50 | #define FT_SUBGLYPH_FLAG_SCALE 8 |
| 51 | #define FT_SUBGLYPH_FLAG_XY_SCALE 0x40 |
| 52 | #define FT_SUBGLYPH_FLAG_2X2 0x80 |
| 53 | #define FT_SUBGLYPH_FLAG_USE_MY_METRICS 0x200 |
| 54 | #endif |
| 55 | |
| 56 | |
| 57 | typedef struct FT_SubGlyphRec_ |
| 58 | { |
| 59 | FT_Int index; |
| 60 | FT_UShort flags; |
| 61 | FT_Int arg1; |
| 62 | FT_Int arg2; |
| 63 | FT_Matrix transform; |
| 64 | |
| 65 | } FT_SubGlyphRec; |
| 66 | |
| 67 | |
| 68 | typedef struct FT_GlyphLoadRec_ |
| 69 | { |
The Android Open Source Project | 0a9d06e | 2009-03-18 22:20:25 -0700 | [diff] [blame] | 70 | FT_Outline outline; /* outline */ |
| 71 | FT_Vector* extra_points; /* extra points table */ |
The Android Open Source Project | 049d6fe | 2009-03-03 19:29:31 -0800 | [diff] [blame] | 72 | FT_Vector* extra_points2; /* second extra points table */ |
The Android Open Source Project | 0a9d06e | 2009-03-18 22:20:25 -0700 | [diff] [blame] | 73 | FT_UInt num_subglyphs; /* number of subglyphs */ |
| 74 | FT_SubGlyph subglyphs; /* subglyphs */ |
The Android Open Source Project | 049d6fe | 2009-03-03 19:29:31 -0800 | [diff] [blame] | 75 | |
| 76 | } FT_GlyphLoadRec, *FT_GlyphLoad; |
| 77 | |
| 78 | |
| 79 | typedef struct FT_GlyphLoaderRec_ |
| 80 | { |
| 81 | FT_Memory memory; |
| 82 | FT_UInt max_points; |
| 83 | FT_UInt max_contours; |
| 84 | FT_UInt max_subglyphs; |
| 85 | FT_Bool use_extra; |
| 86 | |
| 87 | FT_GlyphLoadRec base; |
| 88 | FT_GlyphLoadRec current; |
| 89 | |
| 90 | void* other; /* for possible future extension? */ |
| 91 | |
| 92 | } FT_GlyphLoaderRec; |
| 93 | |
| 94 | |
| 95 | /* create new empty glyph loader */ |
| 96 | FT_BASE( FT_Error ) |
| 97 | FT_GlyphLoader_New( FT_Memory memory, |
| 98 | FT_GlyphLoader *aloader ); |
| 99 | |
| 100 | /* add an extra points table to a glyph loader */ |
| 101 | FT_BASE( FT_Error ) |
| 102 | FT_GlyphLoader_CreateExtra( FT_GlyphLoader loader ); |
| 103 | |
| 104 | /* destroy a glyph loader */ |
| 105 | FT_BASE( void ) |
| 106 | FT_GlyphLoader_Done( FT_GlyphLoader loader ); |
| 107 | |
| 108 | /* reset a glyph loader (frees everything int it) */ |
| 109 | FT_BASE( void ) |
| 110 | FT_GlyphLoader_Reset( FT_GlyphLoader loader ); |
| 111 | |
| 112 | /* rewind a glyph loader */ |
| 113 | FT_BASE( void ) |
| 114 | FT_GlyphLoader_Rewind( FT_GlyphLoader loader ); |
| 115 | |
| 116 | /* check that there is enough space to add `n_points' and `n_contours' */ |
| 117 | /* to the glyph loader */ |
| 118 | FT_BASE( FT_Error ) |
| 119 | FT_GlyphLoader_CheckPoints( FT_GlyphLoader loader, |
| 120 | FT_UInt n_points, |
| 121 | FT_UInt n_contours ); |
| 122 | |
| 123 | |
David 'Digit' Turner | 295ffce | 2010-03-03 14:24:57 -0800 | [diff] [blame] | 124 | #define FT_GLYPHLOADER_CHECK_P( _loader, _count ) \ |
| 125 | ( (_count) == 0 || ((_loader)->base.outline.n_points + \ |
| 126 | (_loader)->current.outline.n_points + \ |
| 127 | (unsigned long)(_count)) <= (_loader)->max_points ) |
The Android Open Source Project | 049d6fe | 2009-03-03 19:29:31 -0800 | [diff] [blame] | 128 | |
David 'Digit' Turner | 295ffce | 2010-03-03 14:24:57 -0800 | [diff] [blame] | 129 | #define FT_GLYPHLOADER_CHECK_C( _loader, _count ) \ |
| 130 | ( (_count) == 0 || ((_loader)->base.outline.n_contours + \ |
| 131 | (_loader)->current.outline.n_contours + \ |
| 132 | (unsigned long)(_count)) <= (_loader)->max_contours ) |
The Android Open Source Project | 049d6fe | 2009-03-03 19:29:31 -0800 | [diff] [blame] | 133 | |
| 134 | #define FT_GLYPHLOADER_CHECK_POINTS( _loader, _points,_contours ) \ |
| 135 | ( ( FT_GLYPHLOADER_CHECK_P( _loader, _points ) && \ |
| 136 | FT_GLYPHLOADER_CHECK_C( _loader, _contours ) ) \ |
| 137 | ? 0 \ |
| 138 | : FT_GlyphLoader_CheckPoints( (_loader), (_points), (_contours) ) ) |
| 139 | |
| 140 | |
| 141 | /* check that there is enough space to add `n_subs' sub-glyphs to */ |
| 142 | /* a glyph loader */ |
| 143 | FT_BASE( FT_Error ) |
| 144 | FT_GlyphLoader_CheckSubGlyphs( FT_GlyphLoader loader, |
| 145 | FT_UInt n_subs ); |
| 146 | |
| 147 | /* prepare a glyph loader, i.e. empty the current glyph */ |
| 148 | FT_BASE( void ) |
| 149 | FT_GlyphLoader_Prepare( FT_GlyphLoader loader ); |
| 150 | |
| 151 | /* add the current glyph to the base glyph */ |
| 152 | FT_BASE( void ) |
| 153 | FT_GlyphLoader_Add( FT_GlyphLoader loader ); |
| 154 | |
| 155 | /* copy points from one glyph loader to another */ |
| 156 | FT_BASE( FT_Error ) |
| 157 | FT_GlyphLoader_CopyPoints( FT_GlyphLoader target, |
| 158 | FT_GlyphLoader source ); |
| 159 | |
| 160 | /* */ |
| 161 | |
| 162 | |
| 163 | FT_END_HEADER |
| 164 | |
| 165 | #endif /* __FTGLOADR_H__ */ |
| 166 | |
| 167 | |
| 168 | /* END */ |