[Mesa-dev] glReadPixels broken w/ latest MapRenderbuffer changes

Eric Anholt eric at anholt.net
Fri Nov 4 14:48:48 PDT 2011

On Fri, 04 Nov 2011 07:31:54 -0600, Brian Paul <brianp at vmware.com> wrote:
> The pure, non-DRI swrast driver dies in all glReadPixels calls when 
> reading from the front/back color buffers.  So basically all piglit 
> tests fail.
> I think that the problem is there is no rb->Data for these surfaces; 
> they're XImages/Pixmaps.  The xlib driver needs to have 
> Map/UnmapRenderbuffer functions that can access the pixels in the 
> XImage/Pixmaps.
> Sorry I didn't spot that before you pushed the series, Eric.
> I may not be able to dig into this until later, or the weekend.

Wow, the spans code for that driver is hideous.  Who still uses it?
Also, color index?  Really?
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