ref: 61bd4b9dd1713faf57e738b3ca5e728f87e7e912
dir: /src/cid/cidgload.h/
/******************************************************************* * * cidgload.h 1.0 * * CID-Keyed 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, CID_Builder, used to store the built outline * * - a glyph hinter, T1_Hinter, used to record and apply the stem * hints * * - a charstrings interpreter, CID_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 CIDGLOAD_H #define CIDGLOAD_H #include <cidobjs.h> #ifdef __cplusplus extern "C" { #endif /*************************************************************************/ /* */ /* <Structure> CID_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 CID_Builder_ { FT_Memory memory; CID_Face face; T1_GlyphSlot glyph; FT_Outline current; /* the current glyph outline */ FT_Outline base; /* the composite glyph outline */ FT_Int max_points; /* capacity of base outline in points */ FT_Int max_contours; /* capacity of base outline in contours */ T1_Vector last; T1_Fixed scale_x; T1_Fixed scale_y; T1_Pos pos_x; T1_Pos pos_y; T1_Vector left_bearing; T1_Vector advance; T1_BBox bbox; /* bounding box */ T1_Bool path_begun; T1_Bool load_points; T1_Bool no_recurse; FT_Error error; /* only used for memory errors */ T1_Bool metrics_only; } CID_Builder; /* execution context charstring zone */ typedef struct CID_Decoder_Zone_ { FT_Byte* base; FT_Byte* limit; FT_Byte* cursor; } CID_Decoder_Zone; typedef struct CID_Decoder_ { CID_Builder builder; FT_Int stack[ T1_MAX_CHARSTRINGS_OPERANDS ]; FT_Int* top; CID_Decoder_Zone zones[ T1_MAX_SUBRS_CALLS+1 ]; CID_Decoder_Zone* zone; FT_Matrix font_matrix; CID_Subrs* subrs; FT_UInt lenIV; FT_Int flex_state; FT_Int num_flex_vectors; FT_Vector flex_vectors[7]; } CID_Decoder; LOCAL_DEF void CID_Init_Builder( CID_Builder* builder, CID_Face face, T1_Size size, T1_GlyphSlot glyph ); LOCAL_DEF void CID_Done_Builder( CID_Builder* builder ); LOCAL_DEF void CID_Init_Decoder( CID_Decoder* decoder ); #if 0 /* Compute the maximum advance width of a font through quick parsing */ LOCAL_DEF FT_Error CID_Compute_Max_Advance( CID_Face face, FT_Int *max_advance ); #endif /* This function is exported, because it is used by the T1Dump utility */ LOCAL_DEF FT_Error CID_Parse_CharStrings( CID_Decoder* decoder, FT_Byte* charstring_base, FT_Int charstring_len ); LOCAL_DEF FT_Error CID_Load_Glyph( T1_GlyphSlot glyph, T1_Size size, FT_Int glyph_index, FT_Int load_flags ); #ifdef __cplusplus } #endif #endif /* T1GLOAD_H */