Block Transfer Functions

Fastgraph includes several functions for copying rectangular blocks from one virtual buffer to another virtual buffer of the same color depth. Additionally, some of these functions support copying blocks within the same virtual buffer as long as they don't overlap. Block transfers are useful in many graphics applications, but they are especially important in animation. Because these functions are often used in speed-critical contexts, they do not perform clipping. If needed, clipping can generally be done manually by adjusting the block coordinates to fit within the clipping region.