From e29fce6951c70e5c2036e6dfc4ccf0fe38f24f00 Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Sun, 7 Sep 2014 11:52:51 +0300
Subject: [PATCH] Fixed missing transparency on upscaled textures

Textures with diagonal patterns were treated as opaque after resizing
Images upscaled by hqNx were affected mostly by this issue

http://forum.drdteam.org/viewtopic.php?f=24&t=5370
http://zandronum.com/tracker/view.php?id=269
http://zandronum.com/tracker/view.php?id=315
---
 src/gl/textures/gl_texture.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gl/textures/gl_texture.cpp b/src/gl/textures/gl_texture.cpp
index 4f6e999f2..d74314e99 100644
--- a/src/gl/textures/gl_texture.cpp
+++ b/src/gl/textures/gl_texture.cpp
@@ -558,7 +558,7 @@ bool FTexture::SmoothEdges(unsigned char * buffer,int w, int h)
 		l1+=4;
 		for(x=1;x<w-1;x++, l1+=4)
 		{
-			if (l1[MSB]==0 &&  !CHKPIX(-w) && !CHKPIX(-1) && !CHKPIX(1)) CHKPIX(w);
+			if (l1[MSB]==0 &&  !CHKPIX(-w) && !CHKPIX(-1) && !CHKPIX(1) && !CHKPIX(-w-1) && !CHKPIX(-w+1) && !CHKPIX(w-1) && !CHKPIX(w+1)) CHKPIX(w);
 		}
 		if (l1[MSB]==0 && !CHKPIX(-w) && !CHKPIX(-1)) CHKPIX(w);
 		l1+=4;