327 lines
13 KiB
C
327 lines
13 KiB
C
/***************************************************************************/
|
|
/* */
|
|
/* 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
|
|
|
|
|
|
#ifdef FT_FLAT_COMPILE
|
|
|
|
#include "t1objs.h"
|
|
|
|
#else
|
|
|
|
#include <type1/t1objs.h>
|
|
|
|
#endif
|
|
|
|
|
|
#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 */
|