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Revision d4dde8fb

Added by skyjake almost 9 years ago

OpenGL|libgui: Even more robust setup for GLFramebuffer

There are now five alternative configurations for the framebuffer.
The objective is to find the one that supports the most renderer
features.

According to the OpenGL Wiki, old GPUs may not allow having both depth
and stencil attachments unless they use the same target. Therefore,
if the depth24+stencil8 texture/renderbuffer fails, the fallbacks now
test for simpler color+depth only configurations, although that will
prevent sky masking from working.

IssueID #1977

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