73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
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/******************************************************************************
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* $Id: tif_ovrcache.h,v 1.1 2000-01-28 15:03:32 warmerda Exp $
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*
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* Project: TIFF Overview Builder
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* Purpose: Library functions to maintain two rows of tiles or two strips
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* of data for output overviews as an output cache.
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* Author: Frank Warmerdam, warmerda@home.com
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*
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* This code could potentially be used by other applications wanting to
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* manage a once-through write cache.
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*
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******************************************************************************
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* Copyright (c) 2000, 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: tif_ovrcache.h,v $
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* Revision 1.1 2000-01-28 15:03:32 warmerda
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* New
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*
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*/
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#ifndef TIF_OVRCACHE_H_INCLUDED
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#define TIF_OVRCACHE_H_INCLUDED
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typedef struct
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{
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uint32 nXSize;
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uint32 nYSize;
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uint32 nBlockXSize;
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uint32 nBlockYSize;
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uint16 nBitsPerPixel;
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uint16 nSamples;
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int nBytesPerBlock;
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int nBlocksPerRow;
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int nBlocksPerColumn;
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int nBlockOffset; /* what block is the first in papabyBlocks? */
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unsigned char *pabyRow1Blocks;
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unsigned char *pabyRow2Blocks;
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int nDirOffset;
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TIFF *hTIFF;
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int bTiled;
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} TIFFOvrCache;
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TIFFOvrCache *TIFFCreateOvrCache( TIFF *hTIFF, int nDirOffset );
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unsigned char *TIFFGetOvrBlock( TIFFOvrCache *, int, int, int );
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void TIFFDestroyOvrCache( TIFFOvrCache * );
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#endif /* ndef TIF_OVRCACHE_H_INCLUDED */
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