[692] | 1 | /***************************************************************************/
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| 2 | /* */
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| 3 | /* ftgloadr.h */
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| 4 | /* */
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| 5 | /* The FreeType glyph loader (specification). */
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| 6 | /* */
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| 7 | /* Copyright 2002, 2003 by */
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| 8 | /* David Turner, Robert Wilhelm, and Werner Lemberg */
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| 9 | /* */
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| 10 | /* This file is part of the FreeType project, and may only be used, */
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| 11 | /* modified, and distributed under the terms of the FreeType project */
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| 12 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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| 13 | /* this file you indicate that you have read the license and */
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| 14 | /* understand and accept it fully. */
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| 15 | /* */
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| 16 | /***************************************************************************/
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| 17 |
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| 18 |
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| 19 | #ifndef __FTGLOADR_H__
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| 20 | #define __FTGLOADR_H__
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| 21 |
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| 22 |
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| 23 | #include <ft2build.h>
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| 24 | #include FT_FREETYPE_H
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| 25 |
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| 26 |
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| 27 | FT_BEGIN_HEADER
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| 28 |
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| 29 |
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| 30 | /*************************************************************************/
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| 31 | /* */
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| 32 | /* <Struct> */
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| 33 | /* FT_GlyphLoader */
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| 34 | /* */
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| 35 | /* <Description> */
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| 36 | /* The glyph loader is an internal object used to load several glyphs */
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| 37 | /* together (for example, in the case of composites). */
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| 38 | /* */
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| 39 | /* <Note> */
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| 40 | /* The glyph loader implementation is not part of the high-level API, */
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| 41 | /* hence the forward structure declaration. */
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| 42 | /* */
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| 43 | typedef struct FT_GlyphLoaderRec_* FT_GlyphLoader ;
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| 44 |
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| 45 |
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| 46 | #define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS 1
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| 47 | #define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES 2
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| 48 | #define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID 4
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| 49 | #define FT_SUBGLYPH_FLAG_SCALE 8
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| 50 | #define FT_SUBGLYPH_FLAG_XY_SCALE 0x40
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| 51 | #define FT_SUBGLYPH_FLAG_2X2 0x80
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| 52 | #define FT_SUBGLYPH_FLAG_USE_MY_METRICS 0x200
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| 53 |
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| 54 |
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| 55 | typedef struct FT_SubGlyphRec_
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| 56 | {
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| 57 | FT_Int index;
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| 58 | FT_UShort flags;
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| 59 | FT_Int arg1;
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| 60 | FT_Int arg2;
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| 61 | FT_Matrix transform;
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| 62 |
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| 63 | } FT_SubGlyphRec;
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| 64 |
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| 65 |
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| 66 | typedef struct FT_GlyphLoadRec_
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| 67 | {
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| 68 | FT_Outline outline; /* outline */
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| 69 | FT_Vector* extra_points; /* extra points table */
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| 70 | FT_UInt num_subglyphs; /* number of subglyphs */
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| 71 | FT_SubGlyph subglyphs; /* subglyphs */
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| 72 |
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| 73 | } FT_GlyphLoadRec, *FT_GlyphLoad;
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| 74 |
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| 75 |
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| 76 | typedef struct FT_GlyphLoaderRec_
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| 77 | {
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| 78 | FT_Memory memory;
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| 79 | FT_UInt max_points;
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| 80 | FT_UInt max_contours;
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| 81 | FT_UInt max_subglyphs;
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| 82 | FT_Bool use_extra;
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| 83 |
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| 84 | FT_GlyphLoadRec base;
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| 85 | FT_GlyphLoadRec current;
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| 86 |
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| 87 | void* other; /* for possible future extension? */
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| 88 |
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| 89 | } FT_GlyphLoaderRec;
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| 90 |
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| 91 |
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| 92 | /* create new empty glyph loader */
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| 93 | FT_BASE( FT_Error )
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| 94 | FT_GlyphLoader_New( FT_Memory memory,
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| 95 | FT_GlyphLoader *aloader );
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| 96 |
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| 97 | /* add an extra points table to a glyph loader */
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| 98 | FT_BASE( FT_Error )
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| 99 | FT_GlyphLoader_CreateExtra( FT_GlyphLoader loader );
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| 100 |
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| 101 | /* destroy a glyph loader */
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| 102 | FT_BASE( void )
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| 103 | FT_GlyphLoader_Done( FT_GlyphLoader loader );
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| 104 |
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| 105 | /* reset a glyph loader (frees everything int it) */
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| 106 | FT_BASE( void )
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| 107 | FT_GlyphLoader_Reset( FT_GlyphLoader loader );
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| 108 |
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| 109 | /* rewind a glyph loader */
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| 110 | FT_BASE( void )
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| 111 | FT_GlyphLoader_Rewind( FT_GlyphLoader loader );
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| 112 |
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| 113 | /* check that there is enough space to add `n_points' and `n_contours' */
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| 114 | /* to the glyph loader */
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| 115 | FT_BASE( FT_Error )
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| 116 | FT_GlyphLoader_CheckPoints( FT_GlyphLoader loader,
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| 117 | FT_UInt n_points,
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| 118 | FT_UInt n_contours );
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| 119 |
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| 120 | /* check that there is enough space to add `n_subs' sub-glyphs to */
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| 121 | /* a glyph loader */
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| 122 | FT_BASE( FT_Error )
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| 123 | FT_GlyphLoader_CheckSubGlyphs( FT_GlyphLoader loader,
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| 124 | FT_UInt n_subs );
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| 125 |
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| 126 | /* prepare a glyph loader, i.e. empty the current glyph */
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| 127 | FT_BASE( void )
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| 128 | FT_GlyphLoader_Prepare( FT_GlyphLoader loader );
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| 129 |
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| 130 | /* add the current glyph to the base glyph */
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| 131 | FT_BASE( void )
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| 132 | FT_GlyphLoader_Add( FT_GlyphLoader loader );
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| 133 |
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| 134 | /* copy points from one glyph loader to another */
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| 135 | FT_BASE( FT_Error )
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| 136 | FT_GlyphLoader_CopyPoints( FT_GlyphLoader target,
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| 137 | FT_GlyphLoader source );
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| 138 |
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| 139 | /* */
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| 140 |
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| 141 |
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| 142 | FT_END_HEADER
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| 143 |
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| 144 | #endif /* __FTGLOADR_H__ */
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| 145 |
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| 146 |
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| 147 | /* END */
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