Stretches the contents of the source rectangle to the destination rectangle with optional resampling.
public procedure StretchTo(SrcX: LongInt; SrcY: LongInt; SrcWidth: LongInt; SrcHeight: LongInt; DstImage: TBaseImage; DstX: LongInt; DstY: LongInt; DstWidth: LongInt; DstHeight: LongInt; Filter: TResizeFilter);
No blending is performed - alpha is simply copied/resampled to destination image. Note that stretching is fastest for images in the same data format (and slowest for images in special formats).