| | 1 | /***************************************************************************/ |
| | 2 | /* */ |
| | 3 | /* z1gload.h */ |
| | 4 | /* */ |
| | 5 | /* Experimental Type 1 Glyph Loader (specification). */ |
| | 6 | /* */ |
| | 7 | /* Copyright 1996-2000 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 Z1GLOAD_H |
| | 20 | #define Z1GLOAD_H |
| | 21 | |
| | 22 | |
| | 23 | #ifdef FT_FLAT_COMPILE |
| | 24 | |
| | 25 | #include "z1objs.h" |
| | 26 | |
| | 27 | #else |
| | 28 | |
| | 29 | #include <type1z/z1objs.h> |
| | 30 | |
| | 31 | #endif |
| | 32 | |
| | 33 | |
| | 34 | #ifdef __cplusplus |
| | 35 | extern "C" { |
| | 36 | #endif |
| | 37 | |
| | 38 | |
| | 39 | /*************************************************************************/ |
| | 40 | /* */ |
| | 41 | /* <Structure> */ |
| | 42 | /* Z1_Builder */ |
| | 43 | /* */ |
| | 44 | /* <Description> */ |
| | 45 | /* A structure used during glyph loading to store its outline. */ |
| | 46 | /* */ |
| | 47 | /* <Fields> */ |
| | 48 | /* memory :: The current memory object. */ |
| | 49 | /* */ |
| | 50 | /* face :: The current face object. */ |
| | 51 | /* */ |
| | 52 | /* glyph :: The current glyph slot. */ |
| | 53 | /* */ |
| | 54 | /* loader :: The current glyph loader. */ |
| | 55 | /* */ |
| | 56 | /* current :: The current glyph outline. */ |
| | 57 | /* */ |
| | 58 | /* base :: The base glyph outline. */ |
| | 59 | /* */ |
| | 60 | /* last :: The last point position. */ |
| | 61 | /* */ |
| | 62 | /* scale_x :: The horizontal scale (FUnits to sub-pixels). */ |
| | 63 | /* */ |
| | 64 | /* scale_y :: The vertical scale (FUnits to sub-pixels). */ |
| | 65 | /* */ |
| | 66 | /* pos_x :: The horizontal translation (for composite glyphs). */ |
| | 67 | /* */ |
| | 68 | /* pos_y :: The vertical translation (for composite glyphs). */ |
| | 69 | /* */ |
| | 70 | /* left_bearing :: The left side bearing point. */ |
| | 71 | /* */ |
| | 72 | /* advance :: The horizontal advance vector. */ |
| | 73 | /* */ |
| | 74 | /* no_recurse :: */ |
| | 75 | /* */ |
| | 76 | /* bbox :: The glyph's bounding box. */ |
| | 77 | /* */ |
| | 78 | /* path_begun :: A flag which indicates that a new path has begun. */ |
| | 79 | /* */ |
| | 80 | /* load_points :: A flag which indicates, if not set, that no points */ |
| | 81 | /* are loaded. */ |
| | 82 | /* */ |
| | 83 | /* error :: The current error code. */ |
| | 84 | /* */ |
| | 85 | /* metrics_only :: A flag whether to compute metrics only. */ |
| | 86 | /* */ |
| | 87 | typedef struct Z1_Builder_ |
| | 88 | { |
| | 89 | FT_Memory memory; |
| | 90 | T1_Face face; |
| | 91 | Z1_GlyphSlot glyph; |
| | 92 | FT_GlyphLoader* loader; |
| | 93 | |
| | 94 | FT_Outline* current; /* the current glyph outline */ |
| | 95 | FT_Outline* base; /* the composite glyph outline */ |
| | 96 | |
| | 97 | FT_Vector last; |
| | 98 | |
| | 99 | FT_Fixed scale_x; |
| | 100 | FT_Fixed scale_y; |
| | 101 | |
| | 102 | FT_Pos pos_x; |
| | 103 | FT_Pos pos_y; |
| | 104 | |
| | 105 | FT_Vector left_bearing; |
| | 106 | FT_Vector advance; |
| | 107 | |
| | 108 | FT_BBox bbox; /* bounding box */ |
| | 109 | FT_Bool path_begun; |
| | 110 | FT_Bool load_points; |
| | 111 | FT_Bool no_recurse; |
| | 112 | |
| | 113 | FT_Error error; /* only used for memory errors */ |
| | 114 | FT_Bool metrics_only; |
| | 115 | |
| | 116 | } Z1_Builder; |
| | 117 | |
| | 118 | |
| | 119 | /* execution context charstring zone */ |
| | 120 | typedef struct Z1_Decoder_Zone_ |
| | 121 | { |
| | 122 | FT_Byte* base; |
| | 123 | FT_Byte* limit; |
| | 124 | FT_Byte* cursor; |
| | 125 | |
| | 126 | } Z1_Decoder_Zone; |
| | 127 | |
| | 128 | |
| | 129 | typedef struct Z1_Decoder_ |
| | 130 | { |
| | 131 | Z1_Builder builder; |
| | 132 | |
| | 133 | FT_Int stack[T1_MAX_CHARSTRINGS_OPERANDS]; |
| | 134 | FT_Int* top; |
| | 135 | |
| | 136 | Z1_Decoder_Zone zones[T1_MAX_SUBRS_CALLS + 1]; |
| | 137 | Z1_Decoder_Zone* zone; |
| | 138 | |
| | 139 | FT_Int flex_state; |
| | 140 | FT_Int num_flex_vectors; |
| | 141 | FT_Vector flex_vectors[7]; |
| | 142 | |
| | 143 | T1_Blend* blend; /* for multiple masters */ |
| | 144 | |
| | 145 | } Z1_Decoder; |
| | 146 | |
| | 147 | |
| | 148 | LOCAL_DEF |
| | 149 | void Z1_Init_Builder( Z1_Builder* builder, |
| | 150 | T1_Face face, |
| | 151 | Z1_Size size, |
| | 152 | Z1_GlyphSlot glyph ); |
| | 153 | |
| | 154 | LOCAL_DEF |
| | 155 | void Z1_Done_Builder( Z1_Builder* builder ); |
| | 156 | |
| | 157 | LOCAL_DEF |
| | 158 | void Z1_Init_Decoder( Z1_Decoder* decoder ); |
| | 159 | |
| | 160 | LOCAL_DEF |
| | 161 | FT_Error Z1_Compute_Max_Advance( T1_Face face, |
| | 162 | FT_Int* max_advance ); |
| | 163 | |
| | 164 | LOCAL_DEF |
| | 165 | FT_Error Z1_Parse_CharStrings( Z1_Decoder* decoder, |
| | 166 | FT_Byte* charstring_base, |
| | 167 | FT_Int charstring_len, |
| | 168 | FT_Int num_subrs, |
| | 169 | FT_Byte** subrs_base, |
| | 170 | FT_Int* subrs_len ); |
| | 171 | |
| | 172 | LOCAL_DEF |
| | 173 | FT_Error Z1_Load_Glyph( Z1_GlyphSlot glyph, |
| | 174 | Z1_Size size, |
| | 175 | FT_Int glyph_index, |
| | 176 | FT_Int load_flags ); |
| | 177 | |
| | 178 | |
| | 179 | #ifdef __cplusplus |
| | 180 | } |
| | 181 | #endif |
| | 182 | |
| | 183 | |
| | 184 | #endif /* Z1GLOAD_H */ |
| | 185 | |
| | 186 | |
| | 187 | /* END */ |
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