| /***************************************************************************/ |
| /* */ |
| /* t2gload.h */ |
| /* */ |
| /* OpenType Glyph Loader (specification). */ |
| /* */ |
| /* Copyright 1996-2000 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. */ |
| /* */ |
| /***************************************************************************/ |
| |
| |
| #ifndef T2GLOAD_H |
| #define T2GLOAD_H |
| |
| #include <freetype/freetype.h> |
| |
| |
| #ifdef FT_FLAT_COMPILE |
| |
| #include "t2objs.h" |
| |
| #else |
| |
| #include <cff/t2objs.h> |
| |
| #endif |
| |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| |
| #define T2_MAX_OPERANDS 48 |
| #define T2_MAX_SUBRS_CALLS 32 |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Structure> */ |
| /* T2_Builder */ |
| /* */ |
| /* <Description> */ |
| /* A structure used during glyph loading to store its outline. */ |
| /* */ |
| /* <Fields> */ |
| /* memory :: The current memory object. */ |
| /* */ |
| /* face :: The current face object. */ |
| /* */ |
| /* glyph :: The current glyph slot. */ |
| /* */ |
| /* current :: The current glyph outline. */ |
| /* */ |
| /* base :: The base glyph outline. */ |
| /* */ |
| /* max_points :: maximum points in builder outline */ |
| /* */ |
| /* max_contours :: Maximal number of contours in builder outline. */ |
| /* */ |
| /* last :: The last point position. */ |
| /* */ |
| /* scale_x :: The horizontal scale (FUnits to sub-pixels). */ |
| /* */ |
| /* scale_y :: The vertical scale (FUnits to sub-pixels). */ |
| /* */ |
| /* pos_x :: The horizontal translation (if composite glyph). */ |
| /* */ |
| /* pos_y :: The vertical translation (if composite glyph). */ |
| /* */ |
| /* left_bearing :: The left side bearing point. */ |
| /* */ |
| /* advance :: The horizontal advance vector. */ |
| /* */ |
| /* bbox :: Unused. */ |
| /* */ |
| /* path_begun :: A flag which indicates that a new path has begun. */ |
| /* */ |
| /* load_points :: If this flag is not set, no points are loaded. */ |
| /* */ |
| /* no_recurse :: Set but not used. */ |
| /* */ |
| /* 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 T2_Builder_ |
| { |
| FT_Memory memory; |
| TT_Face face; |
| T2_GlyphSlot glyph; |
| FT_GlyphLoader* loader; |
| FT_Outline* base; |
| FT_Outline* current; |
| |
| 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; |
| |
| } T2_Builder; |
| |
| |
| /* execution context charstring zone */ |
| |
| typedef struct T2_Decoder_Zone_ |
| { |
| FT_Byte* base; |
| FT_Byte* limit; |
| FT_Byte* cursor; |
| |
| } T2_Decoder_Zone; |
| |
| |
| typedef struct T2_Decoder_ |
| { |
| T2_Builder builder; |
| CFF_Font* cff; |
| |
| FT_Fixed stack[T2_MAX_OPERANDS + 1]; |
| FT_Fixed* top; |
| |
| T2_Decoder_Zone zones[T2_MAX_SUBRS_CALLS + 1]; |
| T2_Decoder_Zone* zone; |
| |
| FT_Int flex_state; |
| FT_Int num_flex_vectors; |
| FT_Vector flex_vectors[7]; |
| |
| FT_Pos glyph_width; |
| FT_Pos nominal_width; |
| |
| FT_Bool read_width; |
| FT_Int num_hints; |
| FT_Fixed* buildchar; |
| FT_Int len_buildchar; |
| |
| FT_UInt num_locals; |
| FT_UInt num_globals; |
| |
| FT_Int locals_bias; |
| FT_Int globals_bias; |
| |
| FT_Byte** locals; |
| FT_Byte** globals; |
| |
| } T2_Decoder; |
| |
| |
| FT_LOCAL |
| void T2_Init_Decoder( T2_Decoder* decoder, |
| TT_Face face, |
| T2_Size size, |
| T2_GlyphSlot slot ); |
| |
| FT_LOCAL |
| void T2_Prepare_Decoder( T2_Decoder* decoder, |
| FT_UInt glyph_index ); |
| |
| #if 0 /* unused until we support pure CFF fonts */ |
| |
| /* Compute the maximum advance width of a font through quick parsing */ |
| FT_LOCAL |
| FT_Error T2_Compute_Max_Advance( TT_Face face, |
| FT_Int* max_advance ); |
| |
| #endif /* 0 */ |
| |
| FT_LOCAL |
| FT_Error T2_Parse_CharStrings( T2_Decoder* decoder, |
| FT_Byte* charstring_base, |
| FT_Int charstring_len ); |
| |
| FT_LOCAL |
| FT_Error T2_Load_Glyph( T2_GlyphSlot glyph, |
| T2_Size size, |
| FT_Int glyph_index, |
| FT_Int load_flags ); |
| |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| |
| #endif /* T2GLOAD_H */ |
| |
| |
| /* END */ |