GSdx:

- Feal87 found and fixed a problem with shadows in Silent Hill Origins. Might help other games as well.
- Bit better fix for GoW's "wall of fog" problem. Patch originally from ZeroGravity.

Thanks guys :p

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@2647 96395faa-99c1-11dd-bbfe-3dabce05a288

plugins/GSdx/GSState.cpp

@@ -1896,6 +1896,7 @@ struct GSFrameInfo
 	uint32 FBMSK;
 	uint32 TBP0;
 	uint32 TPSM;
+	uint32 TZTST;
 	bool TME;
 };
 
@@ -2290,9 +2291,10 @@ bool GSC_GodOfWar(const GSFrameInfo& fi, int& skip)
 		{
 			skip = 1; // blur
 		}
-	}
-	else
-	{
+		else if(fi.FBP == 0x00000 && fi.FPSM == PSM_PSMCT32 && fi.TPSM == PSM_PSMT8 && ((fi.TZTST == 2 && fi.FBMSK == 0x00FFFFFF) || (fi.TZTST == 1 && fi.FBMSK == 0x00FFFFFF) || (fi.TZTST == 3 && fi.FBMSK == 0xFF000000)))
+		{
+			skip = 1; // wall of fog
+		}
 	}
 
 	return true;
@@ -2482,6 +2484,7 @@ bool GSState::IsBadFrame(int& skip, int UserHacks_SkipDraw)
 	fi.TME = PRIM->TME;
 	fi.TBP0 = m_context->TEX0.TBP0;
 	fi.TPSM = m_context->TEX0.PSM;
+	fi.TZTST = m_context->TEST.ZTST;
 
 	static GetSkipCount map[CRC::TitleCount];
 	static bool inited = false;

plugins/GSdx/GSTextureCache.cpp

@@ -423,9 +423,18 @@ void GSTextureCache::InvalidateLocalMem(const GSOffset* o, const GSVector4i& r)
 			}
 			else
 			{
-				m_dst[RenderTarget].erase(j);
-
-				delete t;
+				if (psm == PSM_PSMT4HH && t->m_TEX0.PSM == PSM_PSMCT32) 
+				{
+					// Silent Hill Origins shadows: Read 8 bit using only the HIGH bits (4 bit) texture as 32 bit.
+					Read(t, r.rintersect(t->m_valid));
+					return;
+				}
+				else
+				{
+					//printf("Trashing render target. We have a %d type texture and we are trying to write into a %d type texture\n", t->m_TEX0.PSM, psm);
+					m_dst[RenderTarget].erase(j);
+					delete t;
+				}
 			}
 		}
 	}