ftcimage.c

Go to the documentation of this file.

/***************************************************************************/
/*                                                                         */
/*  ftcimage.c                                                             */
/*                                                                         */
/*    FreeType Image cache (body).                                         */
/*                                                                         */
/*  Copyright 2000-2018 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 "ftcimage.h"
#include FT_INTERNAL_MEMORY_H
#include FT_INTERNAL_OBJECTS_H
 
#include "ftccback.h"
#include "ftcerror.h"
 
 
  /* finalize a given glyph image node */
  FT_LOCAL_DEF( void )
  ftc_inode_free( FTC_Node   ftcinode,
                  FTC_Cache  cache )
  {
    FTC_INode  inode = (FTC_INode)ftcinode;
    FT_Memory  memory = cache->memory;
 
 
    if ( inode->glyph )
    {
      FT_Done_Glyph( inode->glyph );
      inode->glyph = NULL;
    }
 
    FTC_GNode_Done( FTC_GNODE( inode ), cache );
    FT_FREE( inode );
  }
 
 
  FT_LOCAL_DEF( void )
  FTC_INode_Free( FTC_INode  inode,
                  FTC_Cache  cache )
  {
    ftc_inode_free( FTC_NODE( inode ), cache );
  }
 
 
  /* initialize a new glyph image node */
  FT_LOCAL_DEF( FT_Error )
  FTC_INode_New( FTC_INode   *pinode,
                 FTC_GQuery   gquery,
                 FTC_Cache    cache )
  {
    FT_Memory  memory = cache->memory;
    FT_Error   error;
    FTC_INode  inode  = NULL;
 
 
    if ( !FT_NEW( inode ) )
    {
      FTC_GNode         gnode  = FTC_GNODE( inode );
      FTC_Family        family = gquery->family;
      FT_UInt           gindex = gquery->gindex;
      FTC_IFamilyClass  clazz  = FTC_CACHE_IFAMILY_CLASS( cache );
 
 
      /* initialize its inner fields */
      FTC_GNode_Init( gnode, gindex, family );
 
      /* we will now load the glyph image */
      error = clazz->family_load_glyph( family, gindex, cache,
                                        &inode->glyph );
      if ( error )
      {
        FTC_INode_Free( inode, cache );
        inode = NULL;
      }
    }
 
    *pinode = inode;
    return error;
  }
 
 
  FT_LOCAL_DEF( FT_Error )
  ftc_inode_new( FTC_Node   *ftcpinode,
                 FT_Pointer  ftcgquery,
                 FTC_Cache   cache )
  {
    FTC_INode  *pinode = (FTC_INode*)ftcpinode;
    FTC_GQuery  gquery = (FTC_GQuery)ftcgquery;
 
 
    return FTC_INode_New( pinode, gquery, cache );
  }
 
 
  FT_LOCAL_DEF( FT_Offset )
  ftc_inode_weight( FTC_Node   ftcinode,
                    FTC_Cache  ftccache )
  {
    FTC_INode  inode = (FTC_INode)ftcinode;
    FT_Offset  size  = 0;
    FT_Glyph   glyph = inode->glyph;
 
    FT_UNUSED( ftccache );
 
 
    switch ( glyph->format )
    {
    case FT_GLYPH_FORMAT_BITMAP:
      {
        FT_BitmapGlyph  bitg;
 
 
        bitg = (FT_BitmapGlyph)glyph;
        size = bitg->bitmap.rows * (FT_Offset)FT_ABS( bitg->bitmap.pitch ) +
               sizeof ( *bitg );
      }
      break;
 
    case FT_GLYPH_FORMAT_OUTLINE:
      {
        FT_OutlineGlyph  outg;
 
 
        outg = (FT_OutlineGlyph)glyph;
        size = (FT_Offset)outg->outline.n_points *
                 ( sizeof ( FT_Vector ) + sizeof ( FT_Byte ) ) +
               (FT_Offset)outg->outline.n_contours * sizeof ( FT_Short ) +
               sizeof ( *outg );
      }
      break;
 
    default:
      ;
    }
 
    size += sizeof ( *inode );
    return size;
  }
 
 
#if 0
 
  FT_LOCAL_DEF( FT_Offset )
  FTC_INode_Weight( FTC_INode  inode )
  {
    return ftc_inode_weight( FTC_NODE( inode ), NULL );
  }
 
#endif /* 0 */
 
 
/* END */