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Message #06216
[Bug 1439133] Re: [MainView] Background color and image rendering is too slow
** Changed in: canonical-devices-system-image
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1439133
Title:
[MainView] Background color and image rendering is too slow
Status in Canonical System Image:
Fix Released
Status in ubuntu-ui-toolkit package in Ubuntu:
Fix Released
Status in ubuntu-ui-toolkit package in Ubuntu RTM:
Fix Released
Bug description:
The MainView renders at the bottom-most layer a background composed of
a colored rectangle and an image. The way it is currently implemented
implies two fullscreen passes with alpha blending on. This is very
slow. A solution would be to use just one pass using a ShaderEffect or
a dedicated C++ component. Disabling alpha blending (possible since
it's the bottom-most layer) would also provide a good performance
boost. Another idea, if no image needs to be rendered, would be to
simply set the GPU clear color to the background color, to render it
for free.
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References