Tom Kacvinsky
24 years ago
parent
167e2be410
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8050a6b85d
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/***************************************************************************/ |
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/* */ |
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/* cffgload.h */ |
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/* */ |
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/* OpenType Glyph Loader (specification). */ |
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/* */ |
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/* Copyright 1996-2000 by */ |
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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/* */ |
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/* This file is part of the FreeType project, and may only be used, */ |
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/* modified, and distributed under the terms of the FreeType project */ |
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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/* this file you indicate that you have read the license and */ |
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/* understand and accept it fully. */ |
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/* */ |
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/***************************************************************************/ |
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#ifndef __CFFGLOAD_H__ |
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#define __CFFGLOAD_H__ |
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#include <ft2build.h> |
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#include FT_FREETYPE_H |
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#include FT_SOURCE_FILE(cff,cffobjs.h) |
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FT_BEGIN_HEADER |
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#define CFF_MAX_OPERANDS 48 |
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#define CFF_MAX_SUBRS_CALLS 32 |
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/*************************************************************************/ |
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/* */ |
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/* <Structure> */ |
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/* CFF_Builder */ |
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/* */ |
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/* <Description> */ |
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/* A structure used during glyph loading to store its outline. */ |
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/* */ |
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/* <Fields> */ |
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/* memory :: The current memory object. */ |
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/* */ |
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/* face :: The current face object. */ |
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/* */ |
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/* glyph :: The current glyph slot. */ |
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/* */ |
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/* current :: The current glyph outline. */ |
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/* */ |
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/* base :: The base glyph outline. */ |
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/* */ |
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/* max_points :: maximum points in builder outline */ |
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/* */ |
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/* max_contours :: Maximal number of contours in builder outline. */ |
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/* */ |
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/* last :: The last point position. */ |
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/* */ |
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/* scale_x :: The horizontal scale (FUnits to sub-pixels). */ |
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/* */ |
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/* scale_y :: The vertical scale (FUnits to sub-pixels). */ |
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/* */ |
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/* pos_x :: The horizontal translation (if composite glyph). */ |
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/* */ |
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/* pos_y :: The vertical translation (if composite glyph). */ |
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/* */ |
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/* left_bearing :: The left side bearing point. */ |
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/* */ |
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/* advance :: The horizontal advance vector. */ |
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/* */ |
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/* bbox :: Unused. */ |
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/* */ |
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/* path_begun :: A flag which indicates that a new path has begun. */ |
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/* */ |
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/* load_points :: If this flag is not set, no points are loaded. */ |
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/* */ |
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/* no_recurse :: Set but not used. */ |
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/* */ |
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/* error :: An error code that is only used to report memory */ |
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/* allocation problems. */ |
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/* */ |
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/* metrics_only :: A boolean indicating that we only want to compute */ |
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/* the metrics of a given glyph, not load all of its */ |
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/* points. */ |
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/* */ |
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typedef struct CFF_Builder_ |
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{ |
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FT_Memory memory; |
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TT_Face face; |
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CFF_GlyphSlot glyph; |
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FT_GlyphLoader* loader; |
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FT_Outline* base; |
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FT_Outline* current; |
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FT_Vector last; |
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FT_Fixed scale_x; |
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FT_Fixed scale_y; |
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FT_Pos pos_x; |
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FT_Pos pos_y; |
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FT_Vector left_bearing; |
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FT_Vector advance; |
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FT_BBox bbox; /* bounding box */ |
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FT_Bool path_begun; |
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FT_Bool load_points; |
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FT_Bool no_recurse; |
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FT_Error error; /* only used for memory errors */ |
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FT_Bool metrics_only; |
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} CFF_Builder; |
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/* execution context charstring zone */ |
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typedef struct CFF_Decoder_Zone_ |
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{ |
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FT_Byte* base; |
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FT_Byte* limit; |
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FT_Byte* cursor; |
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} CFF_Decoder_Zone; |
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typedef struct CFF_Decoder_ |
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{ |
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CFF_Builder builder; |
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CFF_Font* cff; |
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FT_Fixed stack[CFF_MAX_OPERANDS + 1]; |
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FT_Fixed* top; |
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CFF_Decoder_Zone zones[CFF_MAX_SUBRS_CALLS + 1]; |
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CFF_Decoder_Zone* zone; |
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FT_Int flex_state; |
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FT_Int num_flex_vectors; |
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FT_Vector flex_vectors[7]; |
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FT_Pos glyph_width; |
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FT_Pos nominal_width; |
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FT_Bool read_width; |
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FT_Int num_hints; |
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FT_Fixed* buildchar; |
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FT_Int len_buildchar; |
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FT_UInt num_locals; |
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FT_UInt num_globals; |
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FT_Int locals_bias; |
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FT_Int globals_bias; |
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FT_Byte** locals; |
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FT_Byte** globals; |
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FT_Byte** glyph_names; /* for pure CFF fonts only */ |
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FT_UInt num_glyphs; /* number of glyphs in font */ |
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} CFF_Decoder; |
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FT_LOCAL |
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void CFF_Init_Decoder( CFF_Decoder* decoder, |
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TT_Face face, |
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CFF_Size size, |
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CFF_GlyphSlot slot ); |
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FT_LOCAL |
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void CFF_Prepare_Decoder( CFF_Decoder* decoder, |
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FT_UInt glyph_index ); |
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#if 0 /* unused until we support pure CFF fonts */
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/* Compute the maximum advance width of a font through quick parsing */ |
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FT_LOCAL |
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FT_Error CFF_Compute_Max_Advance( TT_Face face, |
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FT_Int* max_advance ); |
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#endif /* 0 */ |
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FT_LOCAL |
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FT_Error CFF_Parse_CharStrings( CFF_Decoder* decoder, |
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FT_Byte* charstring_base, |
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FT_Int charstring_len ); |
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FT_LOCAL |
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FT_Error CFF_Load_Glyph( CFF_GlyphSlot glyph, |
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CFF_Size size, |
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FT_Int glyph_index, |
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FT_Int load_flags ); |
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FT_END_HEADER |
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#endif /* __CFFGLOAD_H__ */ |
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/* END */ |
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