ftcglyph.c

下载来的一个看图软件的源代码

/***************************************************************************/
/*                                                                         */
/*  ftcglyph.c                                                             */
/*                                                                         */
/*    FreeType Glyph Image (FT_Glyph) cache (body).                        */
/*                                                                         */
/*  Copyright 2000-2001 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.                                        */
/*                                                                         */
/***************************************************************************/


#include <ft2build.h>
#include FT_CACHE_H
#include FT_CACHE_INTERNAL_GLYPH_H
#include FT_ERRORS_H
#include FT_LIST_H
#include FT_INTERNAL_OBJECTS_H
#include FT_INTERNAL_DEBUG_H

#include "ftcerror.h"


  /* create a new chunk node, setting its cache index and ref count */
  FT_EXPORT_DEF( void )
  ftc_glyph_node_init( FTC_GlyphNode     gnode,
                       FT_UInt           gindex,
                       FTC_GlyphFamily   gfam )
  {
    FT_UInt  len;
    FT_UInt  start = FTC_GLYPH_FAMILY_START( gfam, gindex );


    gnode->item_start = (FT_UShort)start;

    len = gfam->item_total - start;
    if ( len > gfam->item_count )
      len = gfam->item_count;

    gnode->item_count = (FT_UShort)len;
    gfam->family.num_nodes++;
  }


  FT_EXPORT_DEF( void )
  ftc_glyph_node_done( FTC_GlyphNode  gnode,
                       FTC_Cache      cache )
  {
    /* finalize the node */
    gnode->item_count = 0;
    gnode->item_start = 0;

    ftc_node_done( FTC_NODE( gnode ), cache );
  }


  FT_EXPORT_DEF( FT_Bool )
  ftc_glyph_node_compare( FTC_GlyphNode   gnode,
                          FTC_GlyphQuery  gquery )
  {
    FT_UInt  start = (FT_UInt)gnode->item_start;
    FT_UInt  count = (FT_UInt)gnode->item_count;

    return FT_BOOL( (FT_UInt)( gquery->gindex - start ) < count );
  }


  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                      CHUNK SETS                               *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/


  FT_EXPORT_DEF( FT_Error )
  ftc_glyph_family_init( FTC_GlyphFamily  gfam,
                         FT_UInt32        hash,
                         FT_UInt          item_count,
                         FT_UInt          item_total,
                         FTC_GlyphQuery   gquery,
                         FTC_Cache        cache )
  {
    FT_Error  error;


    error = ftc_family_init( FTC_FAMILY( gfam ), FTC_QUERY( gquery ), cache );
    if ( !error )
    {
      gfam->hash       = hash;
      gfam->item_total = item_total;
      gfam->item_count = item_count;
      
      FTC_GLYPH_FAMILY_FOUND( gfam, gquery );
    }

    return error;
  }


  FT_EXPORT_DEF( void )
  ftc_glyph_family_done( FTC_GlyphFamily  gfam )
  {
    ftc_family_done( FTC_FAMILY( gfam ) );
  }


/* END */