touch-packages team mailing list archive

[Tim Peeters <1439133@xxxxxxxxxxxxxxxxxx>]

Yes, we can set the GPU clear color and remove the Rectangle for the
background color. Currently we will still have to render the semi-
transparent paper texture on top of that.

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https://bugs.launchpad.net/bugs/1439133

Title:
  [MainView] Background color and image rendering is too slow

Status in ubuntu-ui-toolkit package in Ubuntu:
  Confirmed

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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