From: Michel Dänzer <michel@tungstengraphics.com>
Date: Wed, 17 Oct 2007 16:28:03 +0000 (+0200)
Subject: Don't call the driver clear hook when the effective scissor rectangle is empty.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=86b81ef5aa14a2fa7be6e5c319c00324028a1761;p=mesa.git

Don't call the driver clear hook when the effective scissor rectangle is empty.
---

diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c
index cbbe3e8698b..d9c18bfaafc 100644
--- a/src/mesa/main/buffers.c
+++ b/src/mesa/main/buffers.c
@@ -140,7 +140,9 @@ _mesa_Clear( GLbitfield mask )
       return;
    }
 
-   if (ctx->DrawBuffer->Width == 0 || ctx->DrawBuffer->Height == 0)
+   if (ctx->DrawBuffer->Width == 0 || ctx->DrawBuffer->Height == 0 ||
+       ctx->DrawBuffer->_Xmin >= ctx->DrawBuffer->_Xmax ||
+       ctx->DrawBuffer->_Ymin >= ctx->DrawBuffer->_Ymax)
       return;
 
    if (ctx->RenderMode == GL_RENDER) {