ref: b8849e71c2a145d526f09bcc126c895c74793518
dir: /src/cff/t2gload.h/
/***************************************************************************/
/* */
/* 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 */