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

 * 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:

 */