High speed shrink: high speed shrink (HSS), bit 12
Select whether to give priority to speed or accuracy when drawing a rectangular sprite or deformed sprite.
This bit is valid only for drawing commands for rectangular sprites and deformation sprites. Fix to 0 for other drawing commands.
∙ If this bit is set to 1, only pixels with even or odd coordinates in the original picture data are sampled and drawn for the line where drawing is reduced. The even or odd coordinates are selected by the even / odd coordinate selection bit (EOS) of the frame buffer switching mode register (FBCR).
∙ If 1 is specified, the end code of the original picture is ignored regardless of the enlargement / reduction of the sprite.
When 0 is specified, the original picture data is sampled regardless of the even and odd coordinates at any magnification.
It is recommended to specify 0 when slow motion gives priority to drawing accuracy, and 1 when fast motion gives priority to speed.