Check if BP and XF changes actually change values before flushing

1 files changed, 48 insertions, 17 deletions

diff --git a/Source/Core/VideoCommon/Src/XFStructs.cpp b/Source/Core/VideoCommon/Src/XFStructs.cpp
index ec3975cb07..d879c83652 100644
--- a/Source/Core/VideoCommon/Src/XFStructs.cpp
+++ b/Source/Core/VideoCommon/Src/XFStructs.cpp
@@ -121,12 +121,18 @@ void XFRegWritten(int transferSize, u32 baseAddress, u32 *pData)
 		case XFMEM_SETVIEWPORT+3:
 		case XFMEM_SETVIEWPORT+4:
 		case XFMEM_SETVIEWPORT+5:
-			VertexManager::Flush();
-			VertexShaderManager::SetViewportChanged();
-			PixelShaderManager::SetViewportChanged();
+			{
+				u8 size = std::min(transferSize, 6 * 4);
+				if (memcmp((u32*)&xfregs + (address - 0x1000), pData + dataIndex, size))
+				{
+					VertexManager::Flush();
+					VertexShaderManager::SetViewportChanged();
+					PixelShaderManager::SetViewportChanged();
+				}
 
-			nextAddress = XFMEM_SETVIEWPORT + 6;
-			break;
+				nextAddress = XFMEM_SETVIEWPORT + 6;
+				break;
+			}
 
 		case XFMEM_SETPROJECTION:
 		case XFMEM_SETPROJECTION+1:
@@ -135,11 +141,17 @@ void XFRegWritten(int transferSize, u32 baseAddress, u32 *pData)
 		case XFMEM_SETPROJECTION+4:
 		case XFMEM_SETPROJECTION+5:
 		case XFMEM_SETPROJECTION+6:
-			VertexManager::Flush();			
-			VertexShaderManager::SetProjectionChanged();
+			{
+				u8 size = std::min(transferSize, 7 * 4);
+				if (memcmp((u32*)&xfregs + (address - 0x1000), pData + dataIndex, size))
+				{
+					VertexManager::Flush();
+					VertexShaderManager::SetProjectionChanged();
+				}
 
-			nextAddress = XFMEM_SETPROJECTION + 7;
-			break;
+				nextAddress = XFMEM_SETPROJECTION + 7;
+				break;
+			}
 
         case XFMEM_SETNUMTEXGENS: // GXSetNumTexGens
 			if (xfregs.numTexGen.numTexGens != (newValue & 15))
@@ -154,10 +166,16 @@ void XFRegWritten(int transferSize, u32 baseAddress, u32 *pData)
 		case XFMEM_SETTEXMTXINFO+5:
 		case XFMEM_SETTEXMTXINFO+6:
 		case XFMEM_SETTEXMTXINFO+7:
-			VertexManager::Flush();
+			{
+				u8 size = std::min(transferSize, 8 * 4);
+				if (memcmp((u32*)&xfregs + (address - 0x1000), pData + dataIndex, size))
+				{
+					VertexManager::Flush();
+				}
 
-			nextAddress = XFMEM_SETTEXMTXINFO + 8;
-			break;
+				nextAddress = XFMEM_SETTEXMTXINFO + 8;
+				break;
+			}
 
 		case XFMEM_SETPOSMTXINFO:
 		case XFMEM_SETPOSMTXINFO+1:
@@ -167,10 +185,16 @@ void XFRegWritten(int transferSize, u32 baseAddress, u32 *pData)
 		case XFMEM_SETPOSMTXINFO+5:
 		case XFMEM_SETPOSMTXINFO+6:
 		case XFMEM_SETPOSMTXINFO+7:
-			VertexManager::Flush();
+			{
+				u8 size = std::min(transferSize, 8 * 4);
+				if (memcmp((u32*)&xfregs + (address - 0x1000), pData + dataIndex, size))
+				{
+					VertexManager::Flush();
+				}
 
-			nextAddress = XFMEM_SETPOSMTXINFO + 8;
-			break;
+				nextAddress = XFMEM_SETPOSMTXINFO + 8;
+				break;
+			}
 
 		// --------------
 		// Unknown Regs
@@ -240,8 +264,15 @@ void LoadXFReg(u32 transferSize, u32 baseAddress, u32 *pData)
 			transferSize = 0;
 		}
 		
-		XFMemWritten(xfMemTransferSize, xfMemBase);
-		memcpy_gc(&xfmem[xfMemBase], pData, xfMemTransferSize * 4);
+		for (u32 i = 0; i < xfMemTransferSize; ++i)
+		{
+			if (((u32*)&xfmem[xfMemBase])[i] != pData[i])
+			{
+				XFMemWritten(xfMemTransferSize, xfMemBase);
+				memcpy_gc(&xfmem[xfMemBase], pData, xfMemTransferSize * 4);
+				break;
+			}
+		}
 
 		pData += xfMemTransferSize;
 	}