diff options
Diffstat (limited to 'tiff/contrib/addtiffo/tif_ovrcache.c')
| -rw-r--r-- | tiff/contrib/addtiffo/tif_ovrcache.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/tiff/contrib/addtiffo/tif_ovrcache.c b/tiff/contrib/addtiffo/tif_ovrcache.c new file mode 100644 index 0000000..646b534 --- /dev/null +++ b/tiff/contrib/addtiffo/tif_ovrcache.c @@ -0,0 +1,341 @@ +/****************************************************************************** + * $Id: tif_ovrcache.c,v 1.7.2.1 2010-06-08 18:50:40 bfriesen 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 + * + ****************************************************************************** + * 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. + ****************************************************************************** + */ + +#include "tiffiop.h" +#include "tif_ovrcache.h" +#include <assert.h> + +/************************************************************************/ +/* TIFFCreateOvrCache() */ +/* */ +/* Create an overview cache to hold two rows of blocks from an */ +/* existing TIFF directory. */ +/************************************************************************/ + +TIFFOvrCache *TIFFCreateOvrCache( TIFF *hTIFF, int nDirOffset ) + +{ + TIFFOvrCache *psCache; + uint32 nBaseDirOffset; + + psCache = (TIFFOvrCache *) _TIFFmalloc(sizeof(TIFFOvrCache)); + psCache->nDirOffset = nDirOffset; + psCache->hTIFF = hTIFF; + +/* -------------------------------------------------------------------- */ +/* Get definition of this raster from the TIFF file itself. */ +/* -------------------------------------------------------------------- */ + nBaseDirOffset = TIFFCurrentDirOffset( psCache->hTIFF ); + TIFFSetSubDirectory( hTIFF, nDirOffset ); + + TIFFGetField( hTIFF, TIFFTAG_IMAGEWIDTH, &(psCache->nXSize) ); + TIFFGetField( hTIFF, TIFFTAG_IMAGELENGTH, &(psCache->nYSize) ); + + TIFFGetField( hTIFF, TIFFTAG_BITSPERSAMPLE, &(psCache->nBitsPerPixel) ); + TIFFGetField( hTIFF, TIFFTAG_SAMPLESPERPIXEL, &(psCache->nSamples) ); + TIFFGetField( hTIFF, TIFFTAG_PLANARCONFIG, &(psCache->nPlanarConfig) ); + + if( !TIFFIsTiled( hTIFF ) ) + { + TIFFGetField( hTIFF, TIFFTAG_ROWSPERSTRIP, &(psCache->nBlockYSize) ); + psCache->nBlockXSize = psCache->nXSize; + psCache->nBytesPerBlock = TIFFStripSize(hTIFF); + psCache->bTiled = FALSE; + } + else + { + TIFFGetField( hTIFF, TIFFTAG_TILEWIDTH, &(psCache->nBlockXSize) ); + TIFFGetField( hTIFF, TIFFTAG_TILELENGTH, &(psCache->nBlockYSize) ); + psCache->nBytesPerBlock = TIFFTileSize(hTIFF); + psCache->bTiled = TRUE; + } + +/* -------------------------------------------------------------------- */ +/* Compute some values from this. */ +/* -------------------------------------------------------------------- */ + + psCache->nBlocksPerRow = (psCache->nXSize + psCache->nBlockXSize - 1) + / psCache->nBlockXSize; + psCache->nBlocksPerColumn = (psCache->nYSize + psCache->nBlockYSize - 1) + / psCache->nBlockYSize; + + if (psCache->nPlanarConfig == PLANARCONFIG_SEPARATE) + psCache->nBytesPerRow = psCache->nBytesPerBlock + * psCache->nBlocksPerRow * psCache->nSamples; + else + psCache->nBytesPerRow = + psCache->nBytesPerBlock * psCache->nBlocksPerRow; + + +/* -------------------------------------------------------------------- */ +/* Allocate and initialize the data buffers. */ +/* -------------------------------------------------------------------- */ + + psCache->pabyRow1Blocks = + (unsigned char *) _TIFFmalloc(psCache->nBytesPerRow); + psCache->pabyRow2Blocks = + (unsigned char *) _TIFFmalloc(psCache->nBytesPerRow); + + if( psCache->pabyRow1Blocks == NULL + || psCache->pabyRow2Blocks == NULL ) + { + TIFFErrorExt( hTIFF->tif_clientdata, hTIFF->tif_name, + "Can't allocate memory for overview cache." ); + /* TODO: use of TIFFError is inconsistent with use of fprintf in addtiffo.c, sort out */ + return NULL; + } + + _TIFFmemset( psCache->pabyRow1Blocks, 0, psCache->nBytesPerRow ); + _TIFFmemset( psCache->pabyRow2Blocks, 0, psCache->nBytesPerRow ); + + psCache->nBlockOffset = 0; + + TIFFSetSubDirectory( psCache->hTIFF, nBaseDirOffset ); + + return psCache; +} + +/************************************************************************/ +/* TIFFWriteOvrRow() */ +/* */ +/* Write one entire row of blocks (row 1) to the tiff file, and */ +/* then rotate the block buffers, essentially moving things */ +/* down by one block. */ +/************************************************************************/ + +static void TIFFWriteOvrRow( TIFFOvrCache * psCache ) + +{ + int nRet, iTileX, iTileY = psCache->nBlockOffset; + unsigned char *pabyData; + uint32 nBaseDirOffset; + uint32 RowsInStrip; + +/* -------------------------------------------------------------------- */ +/* If the output cache is multi-byte per sample, and the file */ +/* being written to is of a different byte order than the current */ +/* platform, we will need to byte swap the data. */ +/* -------------------------------------------------------------------- */ + if( TIFFIsByteSwapped(psCache->hTIFF) ) + { + if( psCache->nBitsPerPixel == 16 ) + TIFFSwabArrayOfShort( (uint16 *) psCache->pabyRow1Blocks, + (psCache->nBytesPerBlock * psCache->nSamples) / 2 ); + + else if( psCache->nBitsPerPixel == 32 ) + TIFFSwabArrayOfLong( (uint32 *) psCache->pabyRow1Blocks, + (psCache->nBytesPerBlock * psCache->nSamples) / 4 ); + + else if( psCache->nBitsPerPixel == 64 ) + TIFFSwabArrayOfDouble( (double *) psCache->pabyRow1Blocks, + (psCache->nBytesPerBlock * psCache->nSamples) / 8 ); + } + +/* -------------------------------------------------------------------- */ +/* Record original directory position, so we can restore it at */ +/* end. */ +/* -------------------------------------------------------------------- */ + nBaseDirOffset = TIFFCurrentDirOffset( psCache->hTIFF ); + nRet = TIFFSetSubDirectory( psCache->hTIFF, psCache->nDirOffset ); + assert( nRet == 1 ); + +/* -------------------------------------------------------------------- */ +/* Write blocks to TIFF file. */ +/* -------------------------------------------------------------------- */ + for( iTileX = 0; iTileX < psCache->nBlocksPerRow; iTileX++ ) + { + int nTileID; + + if (psCache->nPlanarConfig == PLANARCONFIG_SEPARATE) + { + int iSample; + + for( iSample = 0; iSample < psCache->nSamples; iSample++ ) + { + pabyData = TIFFGetOvrBlock( psCache, iTileX, iTileY, iSample ); + + if( psCache->bTiled ) + { + nTileID = TIFFComputeTile( psCache->hTIFF, + iTileX * psCache->nBlockXSize, + iTileY * psCache->nBlockYSize, + 0, (tsample_t) iSample ); + TIFFWriteEncodedTile( psCache->hTIFF, nTileID, + pabyData, + TIFFTileSize(psCache->hTIFF) ); + } + else + { + nTileID = TIFFComputeStrip( psCache->hTIFF, + iTileY * psCache->nBlockYSize, + (tsample_t) iSample ); + RowsInStrip=psCache->nBlockYSize; + if ((iTileY+1)*psCache->nBlockYSize>psCache->nYSize) + RowsInStrip=psCache->nYSize-iTileY*psCache->nBlockYSize; + TIFFWriteEncodedStrip( psCache->hTIFF, nTileID, + pabyData, + TIFFVStripSize(psCache->hTIFF,RowsInStrip) ); + } + } + + } + else + { + pabyData = TIFFGetOvrBlock( psCache, iTileX, iTileY, 0 ); + + if( psCache->bTiled ) + { + nTileID = TIFFComputeTile( psCache->hTIFF, + iTileX * psCache->nBlockXSize, + iTileY * psCache->nBlockYSize, + 0, 0 ); + TIFFWriteEncodedTile( psCache->hTIFF, nTileID, + pabyData, + TIFFTileSize(psCache->hTIFF) ); + } + else + { + nTileID = TIFFComputeStrip( psCache->hTIFF, + iTileY * psCache->nBlockYSize, + 0 ); + RowsInStrip=psCache->nBlockYSize; + if ((iTileY+1)*psCache->nBlockYSize>psCache->nYSize) + RowsInStrip=psCache->nYSize-iTileY*psCache->nBlockYSize; + TIFFWriteEncodedStrip( psCache->hTIFF, nTileID, + pabyData, + TIFFVStripSize(psCache->hTIFF,RowsInStrip) ); + } + } + } + /* TODO: add checks on error status return of TIFFWriteEncodedTile and TIFFWriteEncodedStrip */ + +/* -------------------------------------------------------------------- */ +/* Rotate buffers. */ +/* -------------------------------------------------------------------- */ + pabyData = psCache->pabyRow1Blocks; + psCache->pabyRow1Blocks = psCache->pabyRow2Blocks; + psCache->pabyRow2Blocks = pabyData; + + _TIFFmemset( pabyData, 0, psCache->nBytesPerRow ); + + psCache->nBlockOffset++; + +/* -------------------------------------------------------------------- */ +/* Restore access to original directory. */ +/* -------------------------------------------------------------------- */ + TIFFFlush( psCache->hTIFF ); + /* TODO: add checks on error status return of TIFFFlush */ + TIFFSetSubDirectory( psCache->hTIFF, nBaseDirOffset ); + /* TODO: add checks on error status return of TIFFSetSubDirectory */ +} + +/************************************************************************/ +/* TIFFGetOvrBlock() */ +/************************************************************************/ + +/* TODO: make TIFF_Downsample handle iSample offset, so that we can + * do with a single TIFFGetOvrBlock and no longer need TIFFGetOvrBlock_Subsampled */ +unsigned char *TIFFGetOvrBlock( TIFFOvrCache *psCache, int iTileX, int iTileY, + int iSample ) + +{ + int nRowOffset; + + if( iTileY > psCache->nBlockOffset + 1 ) + TIFFWriteOvrRow( psCache ); + + assert( iTileX >= 0 && iTileX < psCache->nBlocksPerRow ); + assert( iTileY >= 0 && iTileY < psCache->nBlocksPerColumn ); + assert( iTileY >= psCache->nBlockOffset + && iTileY < psCache->nBlockOffset+2 ); + assert( iSample >= 0 && iSample < psCache->nSamples ); + + if (psCache->nPlanarConfig == PLANARCONFIG_SEPARATE) + nRowOffset = ((iTileX * psCache->nSamples) + iSample) + * psCache->nBytesPerBlock; + else + nRowOffset = iTileX * psCache->nBytesPerBlock + + (psCache->nBitsPerPixel + 7) / 8 * iSample; + + if( iTileY == psCache->nBlockOffset ) + return psCache->pabyRow1Blocks + nRowOffset; + else + return psCache->pabyRow2Blocks + nRowOffset; +} + +/************************************************************************/ +/* TIFFGetOvrBlock_Subsampled() */ +/************************************************************************/ + +unsigned char *TIFFGetOvrBlock_Subsampled( TIFFOvrCache *psCache, + int iTileX, int iTileY ) + +{ + int nRowOffset; + + if( iTileY > psCache->nBlockOffset + 1 ) + TIFFWriteOvrRow( psCache ); + + assert( iTileX >= 0 && iTileX < psCache->nBlocksPerRow ); + assert( iTileY >= 0 && iTileY < psCache->nBlocksPerColumn ); + assert( iTileY >= psCache->nBlockOffset + && iTileY < psCache->nBlockOffset+2 ); + assert( psCache->nPlanarConfig != PLANARCONFIG_SEPARATE ); + + nRowOffset = iTileX * psCache->nBytesPerBlock; + + if( iTileY == psCache->nBlockOffset ) + return psCache->pabyRow1Blocks + nRowOffset; + else + return psCache->pabyRow2Blocks + nRowOffset; +} + +/************************************************************************/ +/* TIFFDestroyOvrCache() */ +/************************************************************************/ + +void TIFFDestroyOvrCache( TIFFOvrCache * psCache ) + +{ + while( psCache->nBlockOffset < psCache->nBlocksPerColumn ) + TIFFWriteOvrRow( psCache ); + + _TIFFfree( psCache->pabyRow1Blocks ); + _TIFFfree( psCache->pabyRow2Blocks ); + _TIFFfree( psCache ); +} +/* + * Local Variables: + * mode: c + * c-basic-offset: 8 + * fill-column: 78 + * End: + */ |