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131 lines
5 KiB
C++
131 lines
5 KiB
C++
/*
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* $Id: keaoverview.cpp 28011 2014-11-26 13:47:09Z rouault $
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* keaoverview.cpp
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*
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* Created by Pete Bunting on 01/08/2012.
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* Copyright 2012 LibKEA. All rights reserved.
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*
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* This file is part of LibKEA.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the
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* Software, and to permit persons to whom the Software is furnished
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* 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
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* included 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,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "keaoverview.h"
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// constructor
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KEAOverview::KEAOverview(KEADataset *pDataset, int nSrcBand, GDALAccess eAccess,
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kealib::KEAImageIO *pImageIO, int *pRefCount,
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int nOverviewIndex, uint64_t nXSize, uint64_t nYSize)
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: KEARasterBand( pDataset, nSrcBand, eAccess, pImageIO, pRefCount )
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{
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this->m_nOverviewIndex = nOverviewIndex;
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// overridden from the band - not the same size as the band obviously
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this->nBlockXSize = pImageIO->getOverviewBlockSize(nSrcBand, nOverviewIndex);
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this->nBlockYSize = pImageIO->getOverviewBlockSize(nSrcBand, nOverviewIndex);
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this->nRasterXSize = nXSize;
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this->nRasterYSize = nYSize;
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}
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KEAOverview::~KEAOverview()
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{
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}
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// overridden implementation - calls readFromOverview instead
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CPLErr KEAOverview::IReadBlock( int nBlockXOff, int nBlockYOff, void * pImage )
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{
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try
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{
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// GDAL deals in blocks - if we are at the end of a row
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// we need to adjust the amount read so we don't go over the edge
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int nxsize = this->nBlockXSize;
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int nxtotalsize = this->nBlockXSize * (nBlockXOff + 1);
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if( nxtotalsize > this->nRasterXSize )
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{
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nxsize -= (nxtotalsize - this->nRasterXSize);
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}
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int nysize = this->nBlockYSize;
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int nytotalsize = this->nBlockYSize * (nBlockYOff + 1);
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if( nytotalsize > this->nRasterYSize )
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{
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nysize -= (nytotalsize - this->nRasterYSize);
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}
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this->m_pImageIO->readFromOverview( this->nBand, this->m_nOverviewIndex,
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pImage, this->nBlockXSize * nBlockXOff,
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this->nBlockYSize * nBlockYOff,
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nxsize, nysize, this->nBlockXSize, this->nBlockYSize,
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this->m_eKEADataType );
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return CE_None;
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}
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catch (kealib::KEAIOException &e)
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{
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CPLError( CE_Failure, CPLE_AppDefined,
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"Failed to read file: %s", e.what() );
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return CE_Failure;
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}
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}
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// overridden implementation - calls writeToOverview instead
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CPLErr KEAOverview::IWriteBlock( int nBlockXOff, int nBlockYOff, void * pImage )
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{
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try
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{
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// GDAL deals in blocks - if we are at the end of a row
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// we need to adjust the amount written so we don't go over the edge
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int nxsize = this->nBlockXSize;
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int nxtotalsize = this->nBlockXSize * (nBlockXOff + 1);
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if( nxtotalsize > this->nRasterXSize )
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{
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nxsize -= (nxtotalsize - this->nRasterXSize);
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}
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int nysize = this->nBlockYSize;
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int nytotalsize = this->nBlockYSize * (nBlockYOff + 1);
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if( nytotalsize > this->nRasterYSize )
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{
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nysize -= (nytotalsize - this->nRasterYSize);
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}
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this->m_pImageIO->writeToOverview( this->nBand, this->m_nOverviewIndex,
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pImage, this->nBlockXSize * nBlockXOff,
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this->nBlockYSize * nBlockYOff,
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nxsize, nysize, this->nBlockXSize, this->nBlockYSize,
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this->m_eKEADataType );
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return CE_None;
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}
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catch (kealib::KEAIOException &e)
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{
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CPLError( CE_Failure, CPLE_AppDefined,
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"Failed to write file: %s", e.what() );
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return CE_Failure;
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}
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}
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GDALRasterAttributeTable *KEAOverview::GetDefaultRAT()
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{
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// KEARasterBand implements this, but we don't want to
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return NULL;
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}
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CPLErr KEAOverview::SetDefaultRAT(CPL_UNUSED const GDALRasterAttributeTable *poRAT)
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{
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// KEARasterBand implements this, but we don't want to
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return CE_Failure;
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}
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