Public bug reported:
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.
** Affects: ubuntu-ui-toolkit (Ubuntu)
Importance: High
Assignee: Loïc Molinari (loic.molinari)
Status: Confirmed
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https://bugs.launchpad.net/bugs/1439133
Title:
[MainView] Background color and image rendering is too slow
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