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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