From 9fbb8a8201a1d6c784e7a29e58f338e2058888f3 Mon Sep 17 00:00:00 2001
From: mittorn <mittorn@sibmail.com>
Date: Thu, 4 Apr 2019 10:51:11 +0700
Subject: [PATCH] ref_soft: Add alpha test for brushes to all rendermodes

---
 r_scan.c | 32 ++++++++++++++++++++++----------
 1 file changed, 22 insertions(+), 10 deletions(-)

diff --git a/r_scan.c b/r_scan.c
index 18a72ac9..c0e7838b 100644
--- a/r_scan.c
+++ b/r_scan.c
@@ -1090,9 +1090,12 @@ void D_BlendSpans16 (espan_t *pspan, int alpha)
 
 							btemp = *(pbase + (s >> 16) + (t >> 16) * cachewidth);
 
-							if( alpha != 7 )
-								btemp = BLEND_ALPHA( alpha, btemp, *pdest);
-							*pdest = btemp;
+							if( btemp != TRANSPARENT_COLOR )
+							{
+								if( alpha != 7 )
+									btemp = BLEND_ALPHA( alpha, btemp, *pdest);
+								*pdest = btemp;
+							}
 							//*pz    = izi >> 16;
 						}
 						pdest++;
@@ -1128,9 +1131,12 @@ void D_BlendSpans16 (espan_t *pspan, int alpha)
 
 							btemp = *(pbase + idiths + iditht * cachewidth);
 
-							if( alpha != 7 )
-								btemp = BLEND_ALPHA( alpha, btemp, *pdest);
-							*pdest = btemp;
+							if( btemp != TRANSPARENT_COLOR )
+							{
+								if( alpha != 7 )
+									btemp = BLEND_ALPHA( alpha, btemp, *pdest);
+								*pdest = btemp;
+							}
 							//*pz    = izi >> 16;
 						}
 						pdest++;
@@ -1286,8 +1292,11 @@ void D_AddSpans16 (espan_t *pspan)
 
 							btemp = *(pbase + (s >> 16) + (t >> 16) * cachewidth);
 
-							btemp = BLEND_ADD( btemp, *pdest);
-							*pdest = btemp;
+							if( btemp != TRANSPARENT_COLOR )
+							{
+								btemp = BLEND_ADD( btemp, *pdest);
+								*pdest = btemp;
+							}
 							//*pz    = izi >> 16;
 						}
 						pdest++;
@@ -1323,8 +1332,11 @@ void D_AddSpans16 (espan_t *pspan)
 
 							btemp = *(pbase + idiths + iditht * cachewidth);
 
-							btemp = BLEND_ADD( btemp, *pdest);
-							*pdest = btemp;
+							if( btemp != TRANSPARENT_COLOR )
+							{
+								btemp = BLEND_ADD( btemp, *pdest);
+								*pdest = btemp;
+							}
 							//*pz    = izi >> 16;
 						}
 						pdest++;