|Microsoft DirectX 9.0|
The stretchmode attribute specifies how to stretch an image that does not match the output dimensions.
Must have one of the following values.
stretch: The image is stretched to fit the output frame size without preserving aspect ratio. (Default)
crop: The image is cropped to fit the output frame size.
preserveaspectratio: The original aspect ratio is preserved, with a black letterbox along the shorter dimension.
preserveaspectrationoletterbox: The image is resized to fill the entire target frame while preserving the aspect ratio.