libwiisprite is a C++ sprite library written for the Wii which utilises GX for all it’s graphical operations, meaning the GPU is used to accelerate graphics.

libwiisprite aims to make developing Wii homebrew simple and fun with better graphical results than currently existing libraries.

libwiisprite is currently under heavy development, but this version is a semi-stable version allowing most of the proposed functionality of the library.

Currently 24bit and 32bit PNGs are the only supported image format. We are working on allowing images to be loaded from compiled-in texture data and even more formats.

The library comes with full Doxygen documentation to help get development started. It is also available online: http://feesh.braingravy.co.uk/libwiisprite/

Changes:

Sprites now also can use additional collision detection which includes the rotation and the zoom of the sprite. Check the documentation on how to do it.
Implemented additive blending which can be useful for particle effects. Check the transformation enum in sprites.
Fixed a bug with transformations. Now Sprite accepts u8, so transformations can be used as flags.
Added defines for IR pointer correction. Check spritetest on how to use the pointer the right way.
Several additions to GameWindow: You can now stop the Video subsystem, as well as poll for the height and width of the screen.
You can now use Image to draw on the image. You must derive from the image to an own class to use it.
Images can now only initialized only once. This prevents from freaking Sprites and TiledLayers out when changing images.
Some optimizations here and there.

http://www.wiibrew.org/wiki/Development_Applications/libwiisprite