src/freetype/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;


  LOCAL_DEF
  void  T2_Init_Decoder( T2_Decoder*   decoder,
                         TT_Face       face,
                         T2_Size       size,
                         T2_GlyphSlot  slot );

  LOCAL_DEF
  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 */
  LOCAL_DEF
  FT_Error  T2_Compute_Max_Advance( TT_Face  face,
                                    FT_Int*  max_advance );

#endif /* 0 */

  LOCAL_DEF
  FT_Error  T2_Parse_CharStrings( T2_Decoder*  decoder,
                                  FT_Byte*     charstring_base,
                                  FT_Int       charstring_len );

  LOCAL_DEF
  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 */
Commit	Line	Data
	1	/***************************************************************************/
	2	/* */
	3	/* t2gload.h */
	4	/* */
	5	/* OpenType Glyph Loader (specification). */
	6	/* */
	7	/* Copyright 1996-2000 by */
	8	/* David Turner, Robert Wilhelm, and Werner Lemberg. */
	9	/* */
	10	/* This file is part of the FreeType project, and may only be used, */
	11	/* modified, and distributed under the terms of the FreeType project */
	12	/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
	13	/* this file you indicate that you have read the license and */
	14	/* understand and accept it fully. */
	15	/* */
	16	/***************************************************************************/
	17
	18
	19	#ifndef T2GLOAD_H
	20	#define T2GLOAD_H
	21
	22	#include <freetype/freetype.h>
	23
	24
	25	#ifdef FT_FLAT_COMPILE
	26
	27	#include "t2objs.h"
	28
	29	#else
	30
	31	#include <cff/t2objs.h>
	32
	33	#endif
	34
	35
	36	#ifdef __cplusplus
	37	extern "C" {
	38	#endif
	39
	40
	41	#define T2_MAX_OPERANDS 48
	42	#define T2_MAX_SUBRS_CALLS 32
	43
	44
	45	/*************************************************************************/
	46	/* */
	47	/* <Structure> */
	48	/* T2_Builder */
	49	/* */
	50	/* <Description> */
	51	/* A structure used during glyph loading to store its outline. */
	52	/* */
	53	/* <Fields> */
	54	/* memory :: The current memory object. */
	55	/* */
	56	/* face :: The current face object. */
	57	/* */
	58	/* glyph :: The current glyph slot. */
	59	/* */
	60	/* current :: The current glyph outline. */
	61	/* */
	62	/* base :: The base glyph outline. */
	63	/* */
	64	/* max_points :: maximum points in builder outline */
	65	/* */
	66	/* max_contours :: Maximal number of contours in builder outline. */
	67	/* */
	68	/* last :: The last point position. */
	69	/* */
	70	/* scale_x :: The horizontal scale (FUnits to sub-pixels). */
	71	/* */
	72	/* scale_y :: The vertical scale (FUnits to sub-pixels). */
	73	/* */
	74	/* pos_x :: The horizontal translation (if composite glyph). */
	75	/* */
	76	/* pos_y :: The vertical translation (if composite glyph). */
	77	/* */
	78	/* left_bearing :: The left side bearing point. */
	79	/* */
	80	/* advance :: The horizontal advance vector. */
	81	/* */
	82	/* bbox :: Unused. */
	83	/* */
	84	/* path_begun :: A flag which indicates that a new path has begun. */
	85	/* */
	86	/* load_points :: If this flag is not set, no points are loaded. */
	87	/* */
	88	/* no_recurse :: Set but not used. */
	89	/* */
	90	/* error :: An error code that is only used to report memory */
	91	/* allocation problems. */
	92	/* */
	93	/* metrics_only :: A boolean indicating that we only want to compute */
	94	/* the metrics of a given glyph, not load all of its */
	95	/* points. */
	96	/* */
	97	typedef struct T2_Builder_
	98	{
	99	FT_Memory memory;
	100	TT_Face face;
	101	T2_GlyphSlot glyph;
	102	FT_GlyphLoader* loader;
	103	FT_Outline* base;
	104	FT_Outline* current;
	105
	106	FT_Vector last;
	107
	108	FT_Fixed scale_x;
	109	FT_Fixed scale_y;
	110
	111	FT_Pos pos_x;
	112	FT_Pos pos_y;
	113
	114	FT_Vector left_bearing;
	115	FT_Vector advance;
	116
	117	FT_BBox bbox; /* bounding box */
	118	FT_Bool path_begun;
	119	FT_Bool load_points;
	120	FT_Bool no_recurse;
	121
	122	FT_Error error; /* only used for memory errors */
	123	FT_Bool metrics_only;
	124
	125	} T2_Builder;
	126
	127
	128	/* execution context charstring zone */
	129
	130	typedef struct T2_Decoder_Zone_
	131	{
	132	FT_Byte* base;
	133	FT_Byte* limit;
	134	FT_Byte* cursor;
	135
	136	} T2_Decoder_Zone;
	137
	138
	139	typedef struct T2_Decoder_
	140	{
	141	T2_Builder builder;
	142	CFF_Font* cff;
	143
	144	FT_Fixed stack[T2_MAX_OPERANDS + 1];
	145	FT_Fixed* top;
	146
	147	T2_Decoder_Zone zones[T2_MAX_SUBRS_CALLS + 1];
	148	T2_Decoder_Zone* zone;
	149
	150	FT_Int flex_state;
	151	FT_Int num_flex_vectors;
	152	FT_Vector flex_vectors[7];
	153
	154	FT_Pos glyph_width;
	155	FT_Pos nominal_width;
	156
	157	FT_Bool read_width;
	158	FT_Int num_hints;
	159	FT_Fixed* buildchar;
	160	FT_Int len_buildchar;
	161
	162	FT_UInt num_locals;
	163	FT_UInt num_globals;
	164
	165	FT_Int locals_bias;
	166	FT_Int globals_bias;
	167
	168	FT_Byte** locals;
	169	FT_Byte** globals;
	170
	171	} T2_Decoder;
	172
	173
	174	LOCAL_DEF
	175	void T2_Init_Decoder( T2_Decoder* decoder,
	176	TT_Face face,
	177	T2_Size size,
	178	T2_GlyphSlot slot );
	179
	180	LOCAL_DEF
	181	void T2_Prepare_Decoder( T2_Decoder* decoder,
	182	FT_UInt glyph_index );
	183
	184	#if 0 /* unused until we support pure CFF fonts */
	185
	186	/* Compute the maximum advance width of a font through quick parsing */
	187	LOCAL_DEF
	188	FT_Error T2_Compute_Max_Advance( TT_Face face,
	189	FT_Int* max_advance );
	190
	191	#endif /* 0 */
	192
	193	LOCAL_DEF
	194	FT_Error T2_Parse_CharStrings( T2_Decoder* decoder,
	195	FT_Byte* charstring_base,
	196	FT_Int charstring_len );
	197
	198	LOCAL_DEF
	199	FT_Error T2_Load_Glyph( T2_GlyphSlot glyph,
	200	T2_Size size,
	201	FT_Int glyph_index,
	202	FT_Int load_flags );
	203
	204
	205	#ifdef __cplusplus
	206	}
	207	#endif
	208
	209
	210	#endif /* T2GLOAD_H */
	211
	212
	213	/* END */