Roll starts an horizontal automatic rotation.

Clear clears a set of layers.

Color describes a color as a 16bit RGBA tuple.

DrawBitbap fills a rectangular region with the given pixel colors.

DrawLine draws a rectangle defined by point0 and point1 in a given color.

DrawRequest is a basic drawing request.

Draw response is the return value of a rendering.

init resets all layers.

Pixel is the basic element of a picture.

Point describes a location (x,y) on the bitmap.

SetLayerAlpha defines the global transparency of the layer.

SetLayerOrigin defines the origin of the frame.

SetPixels sets individual pixels of the bitmap.

WriteText writes a string at a given position, with a given font and a given color.