public override void BlitFromMemory( PixelBox src, BasicBox dstBox )
{
PixelBox scaled;
if ( !_buffer.Contains( dstBox ) )
throw new ArgumentException( "Destination box out of range." );
if ( src.Width != dstBox.Width ||
src.Height != dstBox.Height ||
src.Depth != dstBox.Depth )
{
// Scale to destination size. Use DevIL and not iluScale because ILU screws up for
// floating point textures and cannot cope with 3D images.
// This also does pixel format conversion if needed
allocateBuffer();
scaled = _buffer.GetSubVolume( dstBox );
Image.Scale( src, scaled, ImageFilter.Bilinear );
}
else if ( GLPixelUtil.GetGLOriginFormat( src.Format ) == 0 )
{
// Extents match, but format is not accepted as valid source format for GL
// do conversion in temporary buffer
allocateBuffer();
scaled = _buffer.GetSubVolume( dstBox );
PixelConverter.BulkPixelConversion( src, scaled );
}
else
{
// No scaling or conversion needed
scaled = src;
// Set extents for upload
scaled.Left = dstBox.Left;
scaled.Right = dstBox.Right;
scaled.Top = dstBox.Top;
scaled.Bottom = dstBox.Bottom;
scaled.Front = dstBox.Front;
scaled.Back = dstBox.Back;
}
upload( scaled );
freeBuffer();
}
