Draw several simple shapes to a Surface. These functions will work for rendering to any format of Surface. Rendering to hardware Surfaces will be slower than regular software Surfaces.
Most of the functions take a width argument to represent the size of stroke around the edge of the shape. If a width of 0 is passed the function will actually solid fill the entire shape.
All the drawing functions respect the clip area for the Surface, and will be constrained to that area. The functions return a rectangle representing the bounding area of changed pixels.
Most of the arguments accept a color argument that is an RGB triplet. These can also accept an RGBA quadruplet. The alpha value will be written directly into the Surface if it contains pixel alphas, but the draw function will not draw transparently. The color argument can also be an integer pixel value that is already mapped to the Surface's pixel format.
These functions must temporarily lock the Surface they are operating on. Many sequential drawing calls can be sped up by locking and unlocking the Surface object around the draw calls.