From 4b3f77c926f7d72e5a1583028cff248d11c030d2 Mon Sep 17 00:00:00 2001
From: TomW <TomW@localhost>
Date: Mon, 25 Aug 2014 15:22:51 +0100
Subject: [PATCH] Fixed Z range on ViRGE S3D, fixes Grim Fandango.

---
 src/vid_s3_virge.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/vid_s3_virge.c b/src/vid_s3_virge.c
index 69247ae..ebafeb2 100644
--- a/src/vid_s3_virge.c
+++ b/src/vid_s3_virge.c
@@ -2330,7 +2330,7 @@ static void tri(virge_t *virge, s3d_t *s3d_tri, s3d_state_t *state, int yc, int3
         {
                 int x  = (state->x1 + ((1 << 20) - 1)) >> 20;
                 int xe = (state->x2 + ((1 << 20) - 1)) >> 20;
-                uint32_t z = state->base_z;
+                uint32_t z = (state->base_z > 0) ? (state->base_z << 1) : 0;
                 if (x_dir < 0)
                 {
                         x--;
@@ -2419,7 +2419,7 @@ static void tri(virge_t *virge, s3d_t *s3d_tri, s3d_state_t *state, int yc, int3
                         for (; x != xe; x = (x + x_dir) & 0xfff)
                         {
                                 int update = 1;
-                                int16_t src_z;
+                                uint16_t src_z;
                                 _x = x; _y = state->y;
 
                                 if (use_z)