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Does Cairo on Ubuntu use the X11 or the OpenGL backend?

And if someone knows: Does the OpenGL backend render everything on the CPU and then just display it using OpenGL or does it use the shaders to do the rendering? And which OpenGL version/extensions does it require? Is it much faster?

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  • To get more answers please try to ask questions on a single topic only. You may consider to ask the OpenGL part in a second question.
    – Takkat
    Apr 28, 2011 at 14:51

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The Cairo 2D vector graphics library uses X11 and the X renderer as backend. There are no dependencies on OpenGL.

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It seems like they switched to the OpenGL backend for Ubuntu 11.10.

Edit: And back again before the release.

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