radeon: Invert front face winding when rendering to FBO.

[mesa.git] / src / mesa / drivers / dri / r300 / r300_state.c

diff --git a/src/mesa/drivers/dri/r300/r300_state.c b/src/mesa/drivers/dri/r300/r300_state.c
index 4d504d14e36cda7d2636cf1e8232560aee9b8408..12fbf281d991bc4c41b9d0905826ef7d25e1b1e3 100644 (file)
--- a/src/mesa/drivers/dri/r300/r300_state.c
+++ b/src/mesa/drivers/dri/r300/r300_state.c
@@ -434,6 +434,10 @@ static void r300UpdateCulling(GLcontext * ctx)
                break;
        }
 
+       /* Winding is inverted when rendering to FBO */
+       if (ctx->DrawBuffer && ctx->DrawBuffer->Name)
+               val ^= R300_FRONT_FACE_CW;
+
        R300_STATECHANGE(r300, cul);
        r300->hw.cul.cmd[R300_CUL_CULL] = val;
 }