From 3ca7c1fe42f68db32cebf32f0aaf84c6f2c55cb2 Mon Sep 17 00:00:00 2001
From: espes <espes@pequalsnp.com>
Date: Tue, 14 Jul 2015 02:38:24 +1000
Subject: [PATCH] ymax instead of ymin for clip seems to work better

---
 hw/xbox/nv2a.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/hw/xbox/nv2a.c b/hw/xbox/nv2a.c
index 096d8548e2..78bbdf92f4 100644
--- a/hw/xbox/nv2a.c
+++ b/hw/xbox/nv2a.c
@@ -4491,8 +4491,9 @@ static void pgraph_method(NV2AState *d,
         unsigned int ymax = GET_MASK(pg->regs[NV_PGRAPH_CLEARRECTY],
                 NV_PGRAPH_CLEARRECTY_YMAX);
 
-        /* FIXME: Maybe "pg->surface_shape.clip_height-ymax" instead of ymin? */
-        glScissor(xmin, ymin, xmax-xmin+1, ymax-ymin+1);
+        /* FIXME: Should this really be inverted instead of ymin? */
+        glScissor(xmin, pg->surface_shape.clip_height-ymax,
+                  xmax-xmin+1, ymax-ymin+1);
 
         NV2A_DPRINTF("------------------CLEAR 0x%x %d,%d - %d,%d  %x---------------\n",
             parameter, xmin, ymin, xmax, ymax, d->pgraph.regs[NV_PGRAPH_COLORCLEARVALUE]);