[Mesa-dev] [PATCH] swrast: fix readback regression since inversion fix

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

This readback from the frontbuffer with swrast was broken, that bug
just made it more obviously broken, this fixes it by inverting the
sub image gets. Also fixes a few other piglits.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=72327
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=72325

(for 9.2 the patches this depends on were asked to be backported separately
 in an email).
Cc: "9.2" "10.0" mesa-stable at lists.fedoraproject.org
Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 src/mesa/drivers/dri/swrast/swrast.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/swrast/swrast.c b/src/mesa/drivers/dri/swrast/swrast.c
index 73dc5c4..0e1c530 100644
--- a/src/mesa/drivers/dri/swrast/swrast.c
+++ b/src/mesa/drivers/dri/swrast/swrast.c
@@ -402,7 +402,7 @@ swrast_map_renderbuffer(struct gl_context *ctx,
       stride = w * cpp;
       xrb->Base.Buffer = malloc(h * stride);
 
-      sPriv->swrast_loader->getImage(dPriv, x, y, w, h,
+      sPriv->swrast_loader->getImage(dPriv, x, rb->Height - y - h, w, h,
 				     (char *) xrb->Base.Buffer,
 				     dPriv->loaderPrivate);
 
-- 
1.8.3.1