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USENIX 2004 Annual Technical Conference, FREENIX Track — Abstract
Pp. 29–40 of the Proceedings
Glitz: Hardware Accelerated Image Compositing Using OpenGL
Peter Nilsson and David Reveman, Umeå University
Abstract
In recent years 2D graphics applications and window systems tend to
use more demanding graphics features such as alpha blending, image
transformations and anti-aliasing. These features contribute to the user
interfaces by making it possible to add more visual effects as well as
new usable functionalities. All together it makes the graphical
interface a more hospitable, as well as efficient, environment for the user.
Even with today's powerful computers these tasks constitute a heavy
burden on the CPU. This is why many proprietary window systems have
developed powerful 2D graphics engines to carry out these tasks by
utilizing the acceleration capabilities in modern graphics hardware.
We present Glitz, an open source implementation of such a graphics
engine, a portable 2D graphics library that can be used to
render hardware accelerated graphics.
Glitz is layered on top of OpenGL and is designed
to act as an additional backend for cairo, providing it with hardware
accelerated output.
Furthermore, an effort has been made to investigate if the level of hardware
acceleration provided by the X Window System can be improved
by using Glitz to carry out its fundamental drawing operations.
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