109 lines
3.4 KiB
C++
109 lines
3.4 KiB
C++
/******************************************************************************
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* $Id: rawblockedimage.h,v 1.1 1999-08-17 01:47:59 warmerda Exp $
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*
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* Project: GeoTIFF Overview Builder
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* Purpose: Implement the RawBlockedImage class, for holding ``under
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* construction'' overviews in a temporary file.
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* Author: Frank Warmerdam, warmerda@home.com
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*
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******************************************************************************
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* Copyright (c) 1999, Frank Warmerdam
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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******************************************************************************
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*
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* $Log:
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*/
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#ifndef RAWBLOCKEDIMAGE_H_INCLUDED
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#define RAWBLOCKEDIMAGE_H_INCLUDED
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#include <stdio.h>
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/************************************************************************/
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/* ==================================================================== */
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/* RawBlockedImage */
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/* */
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/* The RawBlockedImage class is used to maintain a single band */
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/* raster tiled image on disk. */
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/* ==================================================================== */
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/************************************************************************/
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class RawBlock
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{
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public:
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RawBlock *poNextLRU;
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RawBlock *poPrevLRU;
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int nDirty;
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int nPositionInFile;
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unsigned char *pabyData;
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};
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class RawBlockedImage
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{
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int nXSize;
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int nYSize;
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int nBlockXSize;
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int nBlockYSize;
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int nBitsPerPixel;
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int nBytesPerBlock;
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int nBlocksPerRow;
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int nBlocksPerColumn;
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int nBlocks;
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RawBlock **papoBlocks;
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int nBlocksInCache;
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int nMaxBlocksInCache;
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FILE *fp;
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int nCurFileSize;
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char *pszFilename;
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RawBlock *GetRawBlock( int, int );
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void FlushBlock( RawBlock * );
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void InsertInLRUList( RawBlock * );
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void RemoveFromLRUList( RawBlock * );
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RawBlock *poLRUHead;
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RawBlock *poLRUTail;
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public:
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RawBlockedImage( int nXSize, int nYSize,
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int nBlockXSize, int nBlockYSize,
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int nBitsPerPixel );
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~RawBlockedImage();
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unsigned char*GetTile( int, int );
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unsigned char*GetTileForUpdate( int, int );
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int GetBlockXSize() { return nBlockXSize; }
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int GetBlockYSize() { return nBlockYSize; }
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int GetXSize() { return nXSize; }
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int GetYSize() { return nYSize; }
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int GetBitsPerPixel() { return nBitsPerPixel; }
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};
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#endif /* ndef RAWBLOCKEDIMAGE_H_INCLUDED */
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