From 41bf9def805cc832fed9d7efa02b6d1a71b9f170 Mon Sep 17 00:00:00 2001
From: Major Cooke <paul.growney22@gmail.com>
Date: Tue, 11 Oct 2016 20:15:46 -0500
Subject: [PATCH] GZDoom compatibility for PSPF_FLIP.

---
 src/gl/scene/gl_weapon.cpp | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/src/gl/scene/gl_weapon.cpp b/src/gl/scene/gl_weapon.cpp
index cfa5c05d71..a2a12f947d 100644
--- a/src/gl/scene/gl_weapon.cpp
+++ b/src/gl/scene/gl_weapon.cpp
@@ -129,19 +129,20 @@ void FGLRenderer::DrawPSprite (player_t * player,DPSprite *psp, float sx, float
 	y1 = viewwindowy + vh / 2 - (ftexturemid * scale);
 	y2 = y1 + (r.height * scale) + 1;
 
-	if (!mirror)
+	if (!(mirror) != !(psp->Flags & PSPF_FLIP))
 	{
-		fU1=tex->GetSpriteUL();
-		fV1=tex->GetSpriteVT();
-		fU2=tex->GetSpriteUR();
-		fV2=tex->GetSpriteVB();
+		fU2 = tex->GetSpriteUL();
+		fV1 = tex->GetSpriteVT();
+		fU1 = tex->GetSpriteUR();
+		fV2 = tex->GetSpriteVB();
 	}
 	else
 	{
-		fU2=tex->GetSpriteUL();
-		fV1=tex->GetSpriteVT();
-		fU1=tex->GetSpriteUR();
-		fV2=tex->GetSpriteVB();
+		fU1 = tex->GetSpriteUL();
+		fV1 = tex->GetSpriteVT();
+		fU2 = tex->GetSpriteUR();
+		fV2 = tex->GetSpriteVB();
+		
 	}
 
 	if (tex->GetTransparent() || OverrideShader != -1)