From c741895e45968b50114a1b6ec0307503bce59783 Mon Sep 17 00:00:00 2001
From: Chris Xiong <chirs241097@gmail.com>
Date: Sat, 3 Feb 2018 23:43:31 +0800
Subject: Fixed texture locking for sure this time.

---
 smelt/sdl/gfx_sdl.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'smelt/sdl')

diff --git a/smelt/sdl/gfx_sdl.cpp b/smelt/sdl/gfx_sdl.cpp
index ae50db2..875f103 100644
--- a/smelt/sdl/gfx_sdl.cpp
+++ b/smelt/sdl/gfx_sdl.cpp
@@ -538,11 +538,12 @@ void SMELT_IMPL::smTexutreUnlock(SMTEX tex)
 	if(!ptex->locpx)return;
 	if(!ptex->roloc)
 	{
-		DWORD *src=ptex->locpx,*dst=ptex->px+((ptex->locy*ptex->rw)+ptex->locx);
-		for(int i=0;i<ptex->loch;++i)//TODO: flip it...
+		DWORD *src=ptex->locpx+ptex->locw*(ptex->loch-1),
+			*dst=ptex->px+(((ptex->rh-ptex->locy-1)*ptex->rw)+ptex->locx);
+		for(int i=0;i<ptex->loch;++i)
 		{
 			memcpy(dst,src,ptex->locw*sizeof(DWORD));
-			dst+=ptex->rw;src+=ptex->locw;
+			dst-=ptex->rw;src-=ptex->locw;
 		}
 		if(ptex->lost)configTexture(ptex,ptex->rw,ptex->rh,ptex->px);
 		else
-- 
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