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-rw-r--r--src/mesa/swrast/s_readpix.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c
index 9e80908ba1f..6171b3440e6 100644
--- a/src/mesa/swrast/s_readpix.c
+++ b/src/mesa/swrast/s_readpix.c
@@ -507,6 +507,9 @@ _swrast_ReadPixels( GLcontext *ctx,
/* Do all needed clipping here, so that we can forget about it later */
clippedPacking = *packing;
+ if (clippedPacking.RowLength == 0) {
+ clippedPacking.RowLength = width;
+ }
if (!_mesa_clip_readpixels(ctx, &x, &y, &width, &height,
&clippedPacking.SkipPixels,
&clippedPacking.SkipRows)) {