compiz team mailing list archive

[Sam Spilsbury <sam.spilsbury@xxxxxxxxxxxxx>]

NB: While enabling the copy to texture plugin on the compiz side of
things will allow compiz to work correctly on its own, unity and nux do
not have code to handle splitting up textures and drawing them
individually, ensuring that they do not exceed GL_MAX_TEXTURE_SIZE .

This means that you'll be able to run compiz on its own, but it is
likely that drawing past any dimention which is larger than the maximum
texture size that unity does will fail. This means that full-screen
effects such as full-screen blur will not work correctly. There isn't
code in unity in place at the moment to disable such effects in this
case - please use CompizConfig Settings Manager to disable the Dash blur
before testing monitor add / remove.

That being said, all of unity's widgets are done per-monitor, and unless
the actual monitor dimentions are larger than GL_MAX_TEXTURE_SIZE
itself, then it isn't likely that this limit will be hit.

You can query the maximum texture size by doing

glxinfo -l | grep GL_MAX_TEXTURE_SIZE

Which will return a single value for how large the screen space can be
in any one direction. Any window that draws a desktop window shared over
both monitors (I believe nautilus does this) will request a backing
pixmap that large. Else - you can test this by resizing a window to be
so large that it exceeds that size  (check the dimentions with xwininfo)

-- 
You received this bug notification because you are a member of compiz
packagers, which is subscribed to compiz in Ubuntu.
https://bugs.launchpad.net/bugs/830949

Title:
  [Intel N10 Graphics] Need Compiz' "Copy to Texture" plugin so can
  display on multi-head layouts bigger than the max GL texture size

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