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/******************************************************************************
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* $Id: grass57dataset.cpp,v 1.6 2006/02/13 17:39:31 rblazek Exp $
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* $Id: grass57dataset.cpp,v 1.7 2006/11/09 15:30:45 rblazek Exp $
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*
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* Project: GRASS Driver
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* Purpose: Implement GRASS raster read/write support
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******************************************************************************
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*
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* $Log: grass57dataset.cpp,v $
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* Revision 1.7 2006/11/09 15:30:45 rblazek
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* check if ResetReading failed
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*
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* Revision 1.6 2006/02/13 17:39:31 rblazek
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* header files moved to grass
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*
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#define GRASS_MAX_COLORS 100000 // what is the right value
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CPL_CVSID("$Id: grass57dataset.cpp,v 1.6 2006/02/13 17:39:31 rblazek Exp $");
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CPL_CVSID("$Id: grass57dataset.cpp,v 1.7 2006/11/09 15:30:45 rblazek Exp $");
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CPL_C_START
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void GDALRegister_GRASS(void);
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sNewWindow->ew_res != sOpenWindow.ew_res || sNewWindow->ns_res != sOpenWindow.ns_res ||
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sNewWindow->rows != sOpenWindow.rows || sNewWindow->cols != sOpenWindow.cols )
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{
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G_close_cell( hCell );
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if( hCell >= 0 ) {
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G_close_cell( hCell );
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hCell = -1;
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}
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/* Set window */
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G_set_window( sNewWindow );
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if ( (hCell = G_open_cell_old( pszCellName, pszMapset)) < 0 ) {
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CPLError( CE_Warning, CPLE_AppDefined, "GRASS: Cannot open raster '%s'", pszCellName );
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this->valid = false;
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return CE_Failure;
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}
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CPLErr GRASSRasterBand::IReadBlock( int nBlockXOff, int nBlockYOff, void * pImage )
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{
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if ( ! this->valid ) return CE_Failure;
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// Reset window because IRasterIO could be previosly called
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if ( ResetReading ( &(((GRASSDataset *)poDS)->sCellInfo) ) != CE_None ) {
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return CE_Failure;
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/* Calculate the region */
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struct Cell_head sWindow;
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struct Cell_head *psDsWindow;
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if ( ! this->valid ) return CE_Failure;
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psDsWindow = &(((GRASSDataset *)poDS)->sCellInfo);
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/* Reset resolution */
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G_adjust_Cell_head ( &sWindow, 1, 1);
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ResetReading ( &sWindow );
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if ( ResetReading ( &sWindow ) != CE_None )
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{
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return CE_Failure;
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}
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/* Read Data */
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CELL *cbuf = NULL;
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