From: Alex Deucher <alexdeucher@gmail.com>
Date: Wed, 16 Dec 2009 21:18:22 +0000 (-0500)
Subject: r600: Invert front face winding when rendering to FBO
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=20ee275974a58cd221031d522ad58a9548af2a31;p=mesa.git

r600: Invert front face winding when rendering to FBO

fixes fdo bug 25679

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
---

diff --git a/src/mesa/drivers/dri/r600/r700_state.c b/src/mesa/drivers/dri/r600/r700_state.c
index 244a016e07e..e763d2803c7 100644
--- a/src/mesa/drivers/dri/r600/r700_state.c
+++ b/src/mesa/drivers/dri/r600/r700_state.c
@@ -655,6 +655,10 @@ static void r700UpdateCulling(GLcontext * ctx)
             CLEARbit(r700->PA_SU_SC_MODE_CNTL.u32All, FACE_bit); /* default: ccw */
             break;
     }
+
+    /* Winding is inverted when rendering to FBO */
+    if (ctx->DrawBuffer && ctx->DrawBuffer->Name)
+	    r700->PA_SU_SC_MODE_CNTL.u32All ^= FACE_bit;
 }
 
 static void r700UpdateLineStipple(GLcontext * ctx)