ftcache.h

qt-embedded-2.3.8.tar.gz源码

/***************************************************************************/
/*                                                                         */
/*  ftcache.h                                                              */
/*                                                                         */
/*    FreeType Cache subsystem.                                            */
/*                                                                         */
/*  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.                                        */
/*                                                                         */
/***************************************************************************/


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /*********                                                       *********/
  /*********             WARNING, THIS IS BETA CODE.               *********/
  /*********                                                       *********/
  /*************************************************************************/
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  /*************************************************************************/


#ifndef __FTCACHE_H__
#define __FTCACHE_H__

#ifndef    FT_BUILD_H
#  define  FT_BUILD_H    <freetype/config/ftbuild.h>
#endif
#include   "freetype/config/ftbuild.h"
#include   "freetype/ftglyph.h"

FT_BEGIN_HEADER

#define  FT_CACHE_MANAGER_H               FT_PUBLIC_FILE(cache/ftcmanag.h)
#define  FT_CACHE_IMAGE_H                 FT_PUBLIC_FILE(cache/ftcimage.h)
#define  FT_CACHE_SMALL_BITMAPS_H         FT_PUBLIC_FILE(cache/ftcsbits.h)

#define  FT_CACHE_INTERNAL_LRU_H          FT_PUBLIC_FILE(cache/ftlru.h)
#define  FT_CACHE_INTERNAL_GLYPH_H        FT_PUBLIC_FILE(cache/ftcglyph.h)
#define  FT_CACHE_INTERNAL_CHUNK_H        FT_PUBLIC_FILE(cache/ftcchunk.h)


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                    BASIC TYPE DEFINITIONS                     *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/


  /*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FTC_FaceID                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A generic pointer type that is used to identity face objects.  The */
  /*    contents of such objects is application-dependent.                 */
  /*                                                                       */
  typedef FT_Pointer  FTC_FaceID;


  /*************************************************************************/
  /*                                                                       */
  /* <FuncType>                                                            */
  /*    FTC_Face_Requester                                                 */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A callback function provided by client applications.  It is used   */
  /*    to translate a given FTC_FaceID into a new valid FT_Face object.   */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face_id :: The face ID to resolve.                                 */
  /*                                                                       */
  /*    library :: A handle to a FreeType library object.                  */
  /*                                                                       */
  /*    data    :: Application-provided request data.                      */
  /*                                                                       */
  /* <Output>                                                              */
  /*    aface   :: A new FT_Face handle.                                   */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The face requester should not perform funny things on the returned */
  /*    face object, like creating a new FT_Size for it, or setting a      */
  /*    transformation through FT_Set_Transform()!                         */
  /*                                                                       */
  typedef FT_Error  (*FTC_Face_Requester)( FTC_FaceID  face_id,
                                           FT_Library  library,
                                           FT_Pointer  request_data,
                                           FT_Face*    aface );


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FTC_FontRec                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A simple structure used to describe a given `font' to the cache    */
  /*    manager.  Note that a `font' is the combination of a given face    */
  /*    with a given character size.                                       */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    face_id    :: The ID of the face to use.                           */
  /*                                                                       */
  /*    pix_width  :: The character width in integer pixels.               */
  /*                                                                       */
  /*    pix_height :: The character height in integer pixels.              */
  /*                                                                       */
  typedef struct  FTC_FontRec_
  {
    FTC_FaceID  face_id;
    FT_UShort   pix_width;
    FT_UShort   pix_height;

  } FTC_FontRec;


  /*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FTC_Font                                                           */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A simple handle to a FTC_FontRec structure.                        */
  /*                                                                       */
  typedef FTC_FontRec*  FTC_Font;


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                      CACHE MANAGER OBJECT                     *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/


  /*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    FTC_Manager                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This object is used to cache one or more FT_Face objects, along    */
  /*    with corresponding FT_Size objects.                                */
  /*                                                                       */
  typedef struct FTC_ManagerRec_*  FTC_Manager;


  /*************************************************************************/
  /*                                                                       */