From: Felix Kuehling <fxkuehl@gmx.de>
Date: Sat, 22 Jan 2005 00:52:31 +0000 (+0000)
Subject: Fixed polygon offset with reversed viewport depth range.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f4cafc8d13ed196388bfb27edeccdf3a67cec046;p=mesa.git

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 c2eb8d10b17..98142889339 100644
--- 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
     */