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/******************************************************************************
* $Id: rawblockedimage.h,v 1.1 1999/08/17 01:47:59 warmerda Exp $
*
* Project: GeoTIFF Overview Builder
* Purpose: Implement the RawBlockedImage class, for holding ``under
* construction'' overviews in a temporary file.
* Author: Frank Warmerdam, warmerda@home.com
*
******************************************************************************
* Copyright (c) 1999, 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.
******************************************************************************
*
* $Log:
*/
#ifndef RAWBLOCKEDIMAGE_H_INCLUDED
#define RAWBLOCKEDIMAGE_H_INCLUDED
#include <stdio.h>
/************************************************************************/
/* ==================================================================== */
/* RawBlockedImage */
/* */
/* The RawBlockedImage class is used to maintain a single band */
/* raster tiled image on disk. */
/* ==================================================================== */
/************************************************************************/
class RawBlock
{
public:
RawBlock *poNextLRU;
RawBlock *poPrevLRU;
int nDirty;
int nPositionInFile;
unsigned char *pabyData;
};
class RawBlockedImage
{
int nXSize;
int nYSize;
int nBlockXSize;
int nBlockYSize;
int nBitsPerPixel;
int nBytesPerBlock;
int nBlocksPerRow;
int nBlocksPerColumn;
int nBlocks;
RawBlock **papoBlocks;
int nBlocksInCache;
int nMaxBlocksInCache;
FILE *fp;
int nCurFileSize;
char *pszFilename;
RawBlock *GetRawBlock( int, int );
void FlushBlock( RawBlock * );
void InsertInLRUList( RawBlock * );
void RemoveFromLRUList( RawBlock * );
RawBlock *poLRUHead;
RawBlock *poLRUTail;
public:
RawBlockedImage( int nXSize, int nYSize,
int nBlockXSize, int nBlockYSize,
int nBitsPerPixel );
~RawBlockedImage();
unsigned char*GetTile( int, int );
unsigned char*GetTileForUpdate( int, int );
int GetBlockXSize() { return nBlockXSize; }
int GetBlockYSize() { return nBlockYSize; }
int GetXSize() { return nXSize; }
int GetYSize() { return nYSize; }
int GetBitsPerPixel() { return nBitsPerPixel; }
};
#endif /* ndef RAWBLOCKEDIMAGE_H_INCLUDED */
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