SDL_gfx

The SDL_gfx library evolved out of the SDL_gfxPrimitives code which
provided basic drawing routines such as lines, circles or polygons and
SDL_rotozoom which implemented a interpolating rotozoomer for SDL
surfaces.

The current components of the SDL_gfx library are:

• Graphic Primitives (SDL_gfxPrimitves.h)
• Rotozoomer (SDL_rotozoom.h)
• Framerate control (SDL_framerate.h)
• MMX image filters (SDL_imageFilter.h)
• Custom Blit functions (SDL_gfxBlitFunc.h)

The library is backwards compatible to the above mentioned code. Its is
written in plain C and can be used in C++ code.