#if 0

int nCols, nRows;

if ( mResampler )

{

//read data at source resolution if zoomed in, else do oversampling with factor 2.5

QgsRectangle providerExtent = mProvider->extent();

if ( viewPort->mSrcCRS.isValid() && viewPort->mDestCRS.isValid() && viewPort->mSrcCRS != viewPort->mDestCRS )

{

QgsCoordinateTransform t( viewPort->mSrcCRS, viewPort->mDestCRS );

providerExtent = t.transformBoundingBox( providerExtent );

}

double pixelRatio = theQgsMapToPixel->mapUnitsPerPixel() / ( providerExtent.width() / mProvider->xSize() );

double oversampling = pixelRatio > 1.0 ? 2.5 : pixelRatio;

nCols = viewPort->drawableAreaXDim * oversampling;

nRows = viewPort->drawableAreaYDim * oversampling;

}

else

{

nCols = viewPort->drawableAreaXDim;

nRows = viewPort->drawableAreaYDim;

}

//read data from provider

int typeSize = mProvider->dataTypeSize( mBandNumber ) / 8;

QgsRasterDataProvider::DataType rasterType = ( QgsRasterDataProvider::DataType )mProvider->dataType( mBandNumber );

void* rasterData = VSIMalloc( typeSize * nCols * nRows );

mProvider->readBlock( mBandNumber, viewPort->mDrawnExtent, nCols, nRows,

viewPort->mSrcCRS, viewPort->mDestCRS, rasterData );

int currentRasterPos = 0;

QImage img( nCols, nRows, QImage::Format_ARGB32_Premultiplied );

QRgb* imageScanLine = 0;

int val = 0;

for ( int i = 0; i < nRows; ++i )

{

imageScanLine = ( QRgb* )( img.scanLine( i ) );

for ( int j = 0; j < nCols; ++j )

{

val = readValue( rasterData, rasterType, currentRasterPos );

imageScanLine[j] = mColors[ val ].rgba();

++currentRasterPos;

}

}

CPLFree( rasterData );

if ( mResampler ) //resample to output resolution

{

QImage dstImg( viewPort->drawableAreaXDim, viewPort->drawableAreaYDim, QImage::Format_ARGB32_Premultiplied );

mResampler->resample( img, dstImg );

p->drawImage( QPointF( viewPort->topLeftPoint.x(), viewPort->topLeftPoint.y() ), dstImg );

}

else //use original image

{

p->drawImage( QPointF( viewPort->topLeftPoint.x(), viewPort->topLeftPoint.y() ), img );

}

#endif //0