/***************************************************************************/
/* */
/* t1gload.h */
/* */
/* Type 1 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 T1GLOAD_H
#define T1GLOAD_H
#include <t1objs.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct T1_Builder_ T1_Builder;
typedef FT_Error (*T1_Builder_EndChar)( T1_Builder* loader );
typedef FT_Error (*T1_Builder_Sbw)( T1_Builder* loader,
FT_Pos sbx,
FT_Pos sby,
FT_Pos wx,
FT_Pos wy );
typedef FT_Error (*T1_Builder_ClosePath)( T1_Builder* loader );
typedef FT_Error (*T1_Builder_RLineTo)( T1_Builder* loader,
FT_Pos dx,
FT_Pos dy );
typedef FT_Error (*T1_Builder_RMoveTo)( T1_Builder* loader,
FT_Pos dx,
FT_Pos dy );
typedef FT_Error (*T1_Builder_RCurveTo)( T1_Builder* loader,
FT_Pos dx1,
FT_Pos dy1,
FT_Pos dx2,
FT_Pos dy2,
FT_Pos dx3,
FT_Pos dy3 );
/*************************************************************************/
/* */
/* <Structure> */
/* T1_Builder_Funcs */
/* */
/* <Description> */
/* A structure to store the address of various functions used by a */
/* glyph builder to implement the outline's `path construction'. */
/* */
typedef struct T1_Builder_Funcs_
{
T1_Builder_EndChar end_char;
T1_Builder_Sbw set_bearing_point;
T1_Builder_ClosePath close_path;
T1_Builder_RLineTo rline_to;
T1_Builder_RMoveTo rmove_to;
T1_Builder_RCurveTo rcurve_to;
} T1_Builder_Funcs;
/*************************************************************************/
/* */
/* <Structure> */
/* T1_Builder */
/* */
/* <Description> */
/* A structure used during glyph loading to store its outline. */
/* */
/* <Fields> */
/* memory :: The current memory object. */
/* */
/* face :: The current face object. */
/* */
/* size :: The current size object. */
/* */
/* glyph :: The current glyph slot. */
/* */
/* loader :: The current glyph loader. */
/* */
/* current :: The current glyph outline. */
/* */
/* base :: The base glyph 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 (for composite glyphs). */
/* */
/* pos_y :: The vertical translation (for composite glyphs). */
/* */
/* left_bearing :: The left side bearing point. */
/* */
/* advance :: The horizontal advance vector. */
/* */
/* no_recurse :: */
/* */
/* bbox :: The glyph's bounding box. */
/* */
/* path_begun :: A flag which indicates that a new path has begun. */
/* */
/* load_points :: A flag which indicates, if not set, that no points */
/* are loaded. */
/* */
/* pass :: The pass number for multi-pass hinters. */
/* */
/* hint_point :: The index of the next point to hint. */
/* */
/* funcs :: A table of builder functions used to perform the */
/* outline's path construction. */
/* */
struct T1_Builder_
{
FT_Memory memory;
T1_Face face;
T1_Size size;
T1_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_Bool no_recurse;
FT_BBox bbox; /* bounding box */
FT_Bool path_begun;
FT_Bool load_points;
FT_Int pass;
FT_Int hint_point;
/* path construction function interface */
T1_Builder_Funcs funcs;
};
typedef FT_Error (*T1_Hinter_ChangeHints)( T1_Builder* builder );
typedef FT_Error (*T1_Hinter_DotSection)( T1_Builder* builder );
typedef FT_Error (*T1_Hinter_Stem)( T1_Builder* builder,
FT_Pos pos,
FT_Pos width,
FT_Bool vertical );
typedef FT_Error (*T1_Hinter_Stem3)( T1_Builder* builder,
FT_Pos pos0,
FT_Pos width0,
FT_Pos pos1,
FT_Pos width1,
FT_Pos pos2,
FT_Pos width2,
FT_Bool vertical );
/*************************************************************************/
/* */
/* <Structure> */
/* T1_Hinter_Funcs */
/* */
/* <Description> */
/* A structure to store the address of various functions used by a */
/* Type 1 hinter to perform outline hinting. */
/* */
typedef struct T1_Hinter_Func_
{
T1_Hinter_ChangeHints change_hints;
T1_Hinter_DotSection dot_section;
T1_Hinter_Stem stem;
T1_Hinter_Stem3 stem3;
} T1_Hinter_Funcs;
typedef enum T1_Operator_
{
op_none = 0,
op_endchar,
op_hsbw,
op_seac,
op_sbw,
op_closepath,
op_hlineto,
op_hmoveto,
op_hvcurveto,
op_rlineto,
op_rmoveto,
op_rrcurveto,
op_vhcurveto,
op_vlineto,
op_vmoveto,
op_dotsection,
op_hstem,
op_hstem3,
op_vstem,
op_vstem3,
op_div,
op_callothersubr,
op_callsubr,
op_pop,
op_return,
op_setcurrentpoint,
op_max /* never remove this one */
} T1_Operator;
/* execution context charstring zone */
typedef struct T1_Decoder_Zone_
{
FT_Byte* base;
FT_Byte* limit;
FT_Byte* cursor;
} T1_Decoder_Zone;
typedef struct T1_Decoder_
{
T1_Builder builder;
T1_Hinter_Funcs hinter;
FT_Int stack[T1_MAX_CHARSTRINGS_OPERANDS];
FT_Int* top;
T1_Decoder_Zone zones[T1_MAX_SUBRS_CALLS + 1];
T1_Decoder_Zone* zone;
FT_Int flex_state;
FT_Int num_flex_vectors;
FT_Vector flex_vectors[7];
} T1_Decoder;
LOCAL_DEF
void T1_Init_Builder( T1_Builder* builder,
T1_Face face,
T1_Size size,
T1_GlyphSlot glyph,
const T1_Builder_Funcs* funcs );
LOCAL_DEF
void T1_Done_Builder( T1_Builder* builder );
LOCAL_DEF
void T1_Init_Decoder( T1_Decoder* decoder,
const T1_Hinter_Funcs* funcs );
LOCAL_DEF
FT_Error T1_Compute_Max_Advance( T1_Face face,
FT_Int* max_advance );
LOCAL_DEF
FT_Error T1_Parse_CharStrings( T1_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 T1_Add_Points( T1_Builder* builder,
FT_Int num_points );
LOCAL_DEF
FT_Error T1_Add_Contours( T1_Builder* builder,
FT_Int num_contours );
LOCAL_DEF
FT_Error T1_Load_Glyph( T1_GlyphSlot glyph,
T1_Size size,
FT_Int glyph_index,
FT_Int load_flags );
#ifdef __cplusplus
}
#endif
#endif /* T1GLOAD_H */
/* END */
