[Mesa-stable] [Mesa-dev] [PATCH] swrast: fix incorrectly positioned putImage() in swrast driver

[Eric Anholt]

Brian Paul <brianp at vmware.com> writes:

> Some front buffer rendering was in the wrong position.  This included
> scissored clears, glDrawPixels and glCopyPixels.  The problem was the
> y coordinate passed to putImage() didn't match the y coordinate passed
> to getImage().
>
> We fix this by setting xrb->map_y to the inverted coordinate in
> swrast_map_renderbuffer() which is used later by the putImage() call.
> Also pass xrb->map_y to getImage() to be symmetric.
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97426
> Cc: <mesa-stable at lists.freedesktop.org>

Reviewed-by: Eric Anholt <eric at anholt.net>
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