From a81c3ca115b6cbc2158caed6d98d27616057804c Mon Sep 17 00:00:00 2001
From: toasterbabe <rollerorbital@gmail.com>
Date: Wed, 23 Aug 2017 17:41:16 +0100
Subject: [PATCH] Update V_DrawCroppedPatch to match V_DrawFixedPatch's fixes.

---
 src/v_video.c | 40 ++++++++++++++++++++++------------------
 1 file changed, 22 insertions(+), 18 deletions(-)

diff --git a/src/v_video.c b/src/v_video.c
index 9858e118f..b0d8fc52b 100644
--- a/src/v_video.c
+++ b/src/v_video.c
@@ -808,28 +808,10 @@ void V_DrawCroppedPatch(fixed_t x, fixed_t y, fixed_t pscale, INT32 scrn, patch_
 		y = FixedMul(y,dupy<<FRACBITS);
 		x >>= FRACBITS;
 		y >>= FRACBITS;
-		desttop += (y*vid.width) + x;
 
 		// Center it if necessary
 		if (!(scrn & V_SCALEPATCHMASK))
 		{
-			if (vid.width != BASEVIDWIDTH * dupx)
-			{
-				// dupx adjustments pretend that screen width is BASEVIDWIDTH * dupx,
-				// so center this imaginary screen
-				if (scrn & V_SNAPTORIGHT)
-					desttop += (vid.width - (BASEVIDWIDTH * dupx));
-				else if (!(scrn & V_SNAPTOLEFT))
-					desttop += (vid.width - (BASEVIDWIDTH * dupx)) / 2;
-			}
-			if (vid.height != BASEVIDHEIGHT * dupy)
-			{
-				// same thing here
-				if (scrn & V_SNAPTOBOTTOM)
-					desttop += (vid.height - (BASEVIDHEIGHT * dupy)) * vid.width;
-				else if (!(scrn & V_SNAPTOTOP))
-					desttop += (vid.height - (BASEVIDHEIGHT * dupy)) * vid.width / 2;
-			}
 			// if it's meant to cover the whole screen, black out the rest
 			if (x == 0 && SHORT(patch->width) == BASEVIDWIDTH && y == 0 && SHORT(patch->height) == BASEVIDHEIGHT)
 			{
@@ -837,7 +819,29 @@ void V_DrawCroppedPatch(fixed_t x, fixed_t y, fixed_t pscale, INT32 scrn, patch_
 				source = (const UINT8 *)(column) + 3;
 				V_DrawFill(0, 0, BASEVIDWIDTH, BASEVIDHEIGHT, (column->topdelta == 0xff ? 31 : source[0]));
 			}
+
+			if (vid.width != BASEVIDWIDTH * dupx)
+			{
+				// dupx adjustments pretend that screen width is BASEVIDWIDTH * dupx,
+				// so center this imaginary screen
+				if (scrn & V_SNAPTORIGHT)
+					x += (vid.width - (BASEVIDWIDTH * dupx));
+				else if (!(scrn & V_SNAPTOLEFT))
+					x += (vid.width - (BASEVIDWIDTH * dupx)) / 2;
+			}
+			if (vid.height != BASEVIDHEIGHT * dupy)
+			{
+				// same thing here
+				if ((scrn & (V_SPLITSCREEN|V_SNAPTOBOTTOM)) == (V_SPLITSCREEN|V_SNAPTOBOTTOM))
+					y += (vid.height/2 - (BASEVIDHEIGHT/2 * dupy));
+				else if (scrn & V_SNAPTOBOTTOM)
+					y += (vid.height - (BASEVIDHEIGHT * dupy));
+				else if (!(scrn & V_SNAPTOTOP))
+					y += (vid.height - (BASEVIDHEIGHT * dupy)) / 2;
+			}
 		}
+
+		desttop += (y*vid.width) + x;
 	}
 
 	for (col = sx<<FRACBITS; (col>>FRACBITS) < SHORT(patch->width) && (col>>FRACBITS) < w; col += colfrac, ++x, desttop++)