Glitz is an OpenGL image compositing library. Glitz provides
Porter/Duff compositing of images and implicit mask generation for
geometric primitives, including trapezoids, triangles, and rectangles.
The semantics of Glitz are designed to precisely match the
specification of the X Render extension. Glitz not only implements X
Render features, like component alpha and image transformations, but
also support for additional features like convolution filters and color
gradients, which are not currently part of the X Render specification.
The performance and capabilities of Glitz are very dependent on
thegraphics hardware. Glitz does not in any way handle software
fallbacks when graphics hardware is insufficient. However, it will
report if any requested operation cannot be carried out by thegraphics
hardware, making a higher level software layer responsible for
appropriate actions.