Fixed polygon offset with reversed viewport depth range.

diff --git a/src/mesa/drivers/dri/savage/savage_xmesa.c b/src/mesa/drivers/dri/savage/savage_xmesa.c
index c2eb8d10b17145f7328a95039ade8c51dd363a47..98142889339b5c702f549b16bad5f8e130745b65 100644 (file)
--- a/src/mesa/drivers/dri/savage/savage_xmesa.c
+++ b/src/mesa/drivers/dri/savage/savage_xmesa.c
@@ -394,6 +394,9 @@ savageCreateContext( const __GLcontextModes *mesaVis,
    ctx->Const.MaxLineWidthAA = 3.0;
    ctx->Const.LineWidthGranularity = 1.0;
 #endif
+   /* This is needed to get polygon offset right with reversed depth range
+    * (see savageCalcViewport). Not sure if it has any other side effects. */
+   ctx->MRD *= -1.0;
    
    /* Dri stuff
     */