ref: c06aba285fc2223885288dfaab1cd0a8342ae939
dir: /src/type1z/z1gload.h/
/******************************************************************* * * t1gload.h 1.0 * * Type1 Glyph Loader. * * Copyright 1996-1998 by * David Turner, Robert Wilhelm, and Werner Lemberg. * * This file is part of the FreeType project, and may only be used * modified and distributed under the terms of the FreeType project * license, LICENSE.TXT. By continuing to use, modify, or distribute * this file you indicate that you have read the license and * understand and accept it fully. * * * The Type 1 glyph loader uses three distinct objects to build * scaled and hinted outlines from a charstrings program. These are : * * - a glyph builder, Z1_Builder, used to store the built outline * * - a glyph hinter, Z1_Hinter, used to record and apply the stem * hints * * - a charstrings interpreter, Z1_Decoder, used to parse the * Type 1 charstrings stream, manage a stack and call the builder * and/or hinter depending on the opcodes. * * Ideally, a Type 2 glyph loader would only need to have its own * T2_Decoder object (assuming the hinter is able to manage all * kinds of hints). * ******************************************************************/ #ifndef T1GLOAD_H #define T1GLOAD_H #include <z1objs.h> #ifdef __cplusplus extern "C" { #endif /*************************************************************************/ /* */ /* <Structure> Z1_Builder */ /* */ /* <Description> */ /* a structure used during glyph loading to store its outline. */ /* */ /* <Fields> */ /* system :: current system object */ /* face :: current face object */ /* glyph :: current glyph slot */ /* */ /* current :: current glyph outline */ /* base :: base glyph outline */ /* */ /* max_points :: maximum points in builder outline */ /* max_contours :: maximum contours in builder outline */ /* */ /* last :: last point position */ /* */ /* scale_x :: horizontal scale ( FUnits to sub-pixels ) */ /* scale_y :: vertical scale ( FUnits to sub-pixels ) */ /* pos_x :: horizontal translation (composite glyphs) */ /* pos_y :: vertical translation (composite glyph) */ /* */ /* left_bearing :: left side bearing point */ /* advance :: horizontal advance vector */ /* */ /* path_begun :: flag, indicates that a new path has begun */ /* load_points :: flag, if not set, no points are loaded */ /* */ /* error :: an error code that is only used to report */ /* memory allocation problems.. */ /* */ /* metrics_only :: a boolean indicating that we only want to */ /* compute the metrics of a given glyph, not load */ /* all of its points.. */ /* */ typedef struct Z1_Builder_ { FT_Memory memory; T1_Face face; Z1_GlyphSlot glyph; FT_GlyphLoader* loader; FT_Outline* current; /* the current glyph outline */ FT_Outline* base; /* the composite glyph outline */ FT_Vector last; FT_Fixed scale_x; FT_Fixed scale_y; FT_Pos pos_x; FT_Pos pos_y; FT_Vector left_bearing; FT_Vector advance; FT_BBox bbox; /* bounding box */ FT_Bool path_begun; FT_Bool load_points; FT_Bool no_recurse; FT_Error error; /* only used for memory errors */ FT_Bool metrics_only; } Z1_Builder; /* execution context charstring zone */ typedef struct Z1_Decoder_Zone_ { FT_Byte* base; FT_Byte* limit; FT_Byte* cursor; } Z1_Decoder_Zone; typedef struct Z1_Decoder_ { Z1_Builder builder; FT_Int stack[ T1_MAX_CHARSTRINGS_OPERANDS ]; FT_Int* top; Z1_Decoder_Zone zones[ T1_MAX_SUBRS_CALLS+1 ]; Z1_Decoder_Zone* zone; FT_Int flex_state; FT_Int num_flex_vectors; FT_Vector flex_vectors[7]; T1_Blend* blend; /* for multiple masters */ } Z1_Decoder; LOCAL_DEF void Z1_Init_Builder( Z1_Builder* builder, T1_Face face, Z1_Size size, Z1_GlyphSlot glyph ); LOCAL_DEF void Z1_Done_Builder( Z1_Builder* builder ); LOCAL_DEF void Z1_Init_Decoder( Z1_Decoder* decoder ); /* Compute the maximum advance width of a font through quick parsing */ LOCAL_DEF FT_Error Z1_Compute_Max_Advance( T1_Face face, FT_Int *max_advance ); /* This function is exported, because it is used by the T1Dump utility */ LOCAL_DEF FT_Error Z1_Parse_CharStrings( Z1_Decoder* decoder, FT_Byte* charstring_base, FT_Int charstring_len, FT_Int num_subrs, FT_Byte** subrs_base, FT_Int* subrs_len ); LOCAL_DEF FT_Error Z1_Load_Glyph( Z1_GlyphSlot glyph, Z1_Size size, FT_Int glyph_index, FT_Int load_flags ); #ifdef __cplusplus } #endif #endif /* T1GLOAD_H */