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mesa: Fix FB blitting in case of zero size src or dst rect

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Framebuffer blitting operation should be skipped if any of the
dimensions (width/height) of src/dst rect is zero.

V2: Move the dimension check after error checking in _mesa_BlitFramebuffer.

Fixes: fbblit(negative.nullblit.zeroSize) in Intel oglconform
https://bugs.freedesktop.org/show_bug.cgi?id=59495

Note: Candidate for all the stable branches.

Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
(cherry picked from commit d78dcdf103)
This commit is contained in:
Anuj Phogat 2013-03-07 14:05:38 -08:00 • committed by Ian Romanick
parent 038a29b5c5
commit 02a8f04de1
1 changed files with 3 additions and 1 deletions
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4
src/mesa/main/fbobject.c
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@ -3160,7 +3160,9 @@ _mesa_BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
}
}
if (!mask) {
if (!mask ||
(srcX1 - srcX0) == 0 || (srcY1 - srcY0) == 0 ||
(dstX1 - dstX0) == 0 || (dstY1 - dstY0) == 0) {
return;
}