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Coding Eye-Candy for Portable Linux Devices
Linux is increasingly being used in portable devices with unusual hardware display architectures. For instance, recent OMAP and XScale CPUs support multiple frame-buffer "overlays" whose contents can be combined to form what the user sees on the screen.
As part of ALP, ACCESS has developed a set of kernel modifications, an X extension and driver, and additions to the GDK/GTK stack to take advantage of XScale's three-overlay architecture. This paper provides an overview of these modifications and how they have been used to achieve a variety of "eye-candy" features, such as GTK widgets that float translucently over an actively playing video.
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