From 4511434446e523a5e2a7383b14846df2b91df8f1 Mon Sep 17 00:00:00 2001
From: Simon Howard
Date: Mon, 18 Apr 2011 22:10:16 +0000
Subject: Add test hack for simulating Porsche Monty's scanline emulation (see
 comment in file).

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 2328
---
 src/i_scale.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'src')

diff --git a/src/i_scale.c b/src/i_scale.c
index 3f7b3a7d..0b702311 100644
--- a/src/i_scale.c
+++ b/src/i_scale.c
@@ -964,6 +964,21 @@ static boolean I_Stretch5x(int x1, int y1, int x2, int y2)
         screenp += dest_pitch; bufp += SCREENWIDTH;
     }
 
+    // test hack for Porsche Monty... scan line simulation:
+    // See here: http://www.doomworld.com/vb/post/962612
+
+    if (M_CheckParm("-scanline") > 0)
+    {
+        screenp = (byte *) dest_buffer + 2 * dest_pitch;
+
+        for (y=0; y<1198; y += 3)
+        {
+            memset(screenp, 0, 1600);
+
+            screenp += dest_pitch * 3;
+        }
+    }
+
     return true;
 }
 
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