ttobjs.h

Qt/Embedded是一个多平台的C++图形用户界面应用程序框架

/***************************************************************************/
/*                                                                         */
/*  ttobjs.h                                                               */
/*                                                                         */
/*    Objects manager (specification).                                     */
/*                                                                         */
/*  Copyright 1996-1999 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 TTOBJS_H
#define TTOBJS_H


#include <ftobjs.h>
#include <tttypes.h>
#include <tterrors.h>


#ifdef __cplusplus
  extern "C" {
#endif


  /*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    TT_Driver                                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to a TrueType driver object.                              */
  /*                                                                       */
  typedef struct TT_DriverRec_*  TT_Driver;


  /*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    TT_Instance                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to a TrueType size object.                                */
  /*                                                                       */
  typedef struct TT_SizeRec_*  TT_Size;


  /*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    TT_GlyphSlot                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A handle to a TrueType glyph slot object.                          */
  /*                                                                       */
  /* <Note>                                                                */
  /*    This is a direct typedef of FT_GlyphSlot, as there is nothing      */
  /*    specific about the TrueType glyph slot.                            */
  /*                                                                       */
  typedef FT_GlyphSlot  TT_GlyphSlot;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_GraphicsState                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The TrueType graphics state used during bytecode interpretation.   */
  /*                                                                       */
  typedef struct  TT_GraphicsState_
  {
    TT_UShort      rp0;
    TT_UShort      rp1;
    TT_UShort      rp2;

    TT_UnitVector  dualVector;
    TT_UnitVector  projVector;
    TT_UnitVector  freeVector;

    TT_Long        loop;
    TT_F26Dot6     minimum_distance;
    TT_Int         round_state;

    TT_Bool        auto_flip;
    TT_F26Dot6     control_value_cutin;
    TT_F26Dot6     single_width_cutin;
    TT_F26Dot6     single_width_value;
    TT_Short       delta_base;
    TT_Short       delta_shift;

    TT_Byte        instruct_control;
    TT_Bool        scan_control;
    TT_Int         scan_type;

    TT_UShort      gep0;
    TT_UShort      gep1;
    TT_UShort      gep2;

  } TT_GraphicsState;


  /*************************************************************************/
  /*                                                                       */
  /*  EXECUTION SUBTABLES                                                  */
  /*                                                                       */
  /*  These sub-tables relate to instruction execution.                    */
  /*                                                                       */
  /*************************************************************************/


#define TT_MAX_CODE_RANGES  3


  /*************************************************************************/
  /*                                                                       */
  /* There can only be 3 active code ranges at once:                       */
  /*   - the Font Program                                                  */
  /*   - the CVT Program                                                   */
  /*   - a glyph's instructions set                                        */
  /*                                                                       */
  typedef enum  TT_CodeRange_Tag_
  {
    tt_coderange_none = 0,
    tt_coderange_font,
    tt_coderange_cvt,
    tt_coderange_glyph

  } TT_CodeRange_Tag;


  typedef struct  TT_CodeRange_
  {
    TT_Byte*  base;
    TT_ULong  size;

  } TT_CodeRange;

  typedef TT_CodeRange  TT_CodeRangeTable[TT_MAX_CODE_RANGES];


  /*************************************************************************/
  /*                                                                       */
  /* Defines a function/instruction definition record.                     */
  /*                                                                       */
  typedef struct  TT_DefRecord_
  {
    TT_Int   range;      /* in which code range is it located? */
    TT_Long  start;      /* where does it start?               */
    TT_UInt  opc;        /* function #, or instruction code    */
    TT_Bool  active;     /* is it active?                      */

  } TT_DefRecord, *TT_DefArray;



  /*************************************************************************/
  /*                                                                       */
  /* Subglyph transformation record.                                       */
  /*                                                                       */
  typedef struct  TT_Transform_
  {
    TT_Fixed    xx, xy;     /* transformation matrix coefficients */
    TT_Fixed    yx, yy;
    TT_F26Dot6  ox, oy;     /* offsets        */

  } TT_Transform;


  /*************************************************************************/
  /*                                                                       */
  /* Subglyph loading record.  Used to load composite components.          */
  /*                                                                       */
  typedef struct  TT_SubglyphRec_
  {
    TT_Long       index;        /* subglyph index; initialized with -1 */
    TT_Bool       is_scaled;    /* is the subglyph scaled?             */
    TT_Bool       is_hinted;    /* should it be hinted?                */
    TT_Bool       preserve_pps; /* preserve phantom points?            */

    TT_Long       file_offset;

    TT_BBox       bbox;
    TT_Pos        left_bearing;
    TT_Pos        advance;

    FT_GlyphZone  zone;

    TT_Long       arg1;         /* first argument                      */
    TT_Long       arg2;         /* second argument                     */

    TT_UShort     element_flag; /* current load element flag           */

    TT_Transform  transform;    /* transformation matrix               */

    TT_Vector     pp1, pp2;     /* phantom points                      */