tif_ovrcache.h
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/******************************************************************************
* tif_ovrcache.h,v 1.3 2005/05/25 09:03:16 dron Exp
*
* Project: TIFF Overview Builder
* Purpose: Library functions to maintain two rows of tiles or two strips
* of data for output overviews as an output cache.
* Author: Frank Warmerdam, warmerdam@pobox.com
*
* This code could potentially be used by other applications wanting to
* manage a once-through write cache.
*
******************************************************************************
* Copyright (c) 2000, Frank Warmerdam
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
******************************************************************************
*/
#ifndef TIF_OVRCACHE_H_INCLUDED
#define TIF_OVRCACHE_H_INCLUDED
#include "tiffio.h"
#if defined(__cplusplus)
extern "C" {
#endif
typedef struct
{
uint32 nXSize;
uint32 nYSize;
uint16 nBitsPerPixel;
uint16 nSamples;
uint16 nPlanarConfig;
uint32 nBlockXSize;
uint32 nBlockYSize;
toff_t nBytesPerBlock;
toff_t nBytesPerRow;
int nBlocksPerRow;
int nBlocksPerColumn;
int nBlockOffset; /* what block is the first in papabyBlocks? */
unsigned char *pabyRow1Blocks;
unsigned char *pabyRow2Blocks;
toff_t nDirOffset;
TIFF *hTIFF;
int bTiled;
} TIFFOvrCache;
TIFFOvrCache *TIFFCreateOvrCache( TIFF *hTIFF, toff_t nDirOffset );
unsigned char *TIFFGetOvrBlock( TIFFOvrCache *psCache, int iTileX, int iTileY,
int iSample );
unsigned char *TIFFGetOvrBlock_Subsampled( TIFFOvrCache *psCache, int iTileX, int iTileY );
void TIFFDestroyOvrCache( TIFFOvrCache * );
void TIFFBuildOverviews( TIFF *, int, int *, int, const char *,
int (*)(double,void*), void * );
void TIFF_ProcessFullResBlock( TIFF *, int, int, int, int, int, int *, int,
int, TIFFOvrCache **, uint32, uint32,
unsigned char *, uint32, uint32,
int, const char * );
uint32 TIFF_WriteOverview( TIFF *, uint32, uint32, int, int, int, int, int,
int, int, int, int, unsigned short *,
unsigned short *, unsigned short *, int,
int, int);
#if defined(__cplusplus)
}
#endif
#endif /* ndef TIF_OVRCACHE_H_INCLUDED */
/*
* Local Variables:
* mode: c
* c-basic-offset: 8
* fill-column: 78
* End:
*/