Use the source stride for framebuffer blit.

src/D3D9/Direct3DDevice9.cpp

@@ -1831,14 +1831,15 @@ namespace D3D9
 
 			static void (__cdecl *blitFunction)(void *dst, void *src);
 			static sw::Routine *blitRoutine;
-			static sw::BlitState blitState = {0};
+			static sw::BlitState blitState = {};
 
 			sw::BlitState update;
 			update.width = sourceDescription.Width;
 			update.height = sourceDescription.Height;
 			update.sourceFormat = sw::FORMAT_A8R8G8B8;
+			update.sourceStride = source->getExternalPitchB();
 			update.destFormat = sw::FORMAT_A8R8G8B8;
-			update.stride = dest->getExternalPitchB();
+			update.destStride = dest->getExternalPitchB();
 			update.cursorHeight = 0;
 			update.cursorWidth = 0;
 

src/Main/FrameBuffer.cpp

@@ -119,8 +119,9 @@ namespace sw
 		updateState.width = width;
 		updateState.height = height;
 		updateState.destFormat = format;
+		updateState.destStride = stride;
 		updateState.sourceFormat = sourceFormat;
-		updateState.stride = topLeftOrigin ? (int)sourceStride : -(int)sourceStride;
+		updateState.sourceStride = topLeftOrigin ? (int)sourceStride : -(int)sourceStride;
 		updateState.cursorWidth = cursor.width;
 		updateState.cursorHeight = cursor.height;
 
@@ -169,11 +170,10 @@ namespace sw
 	{
 		const int width = state.width;
 		const int height = state.height;
-		const int width2 = (state.width + 1) & ~1;
 		const int dBytes = Surface::bytes(state.destFormat);
-		const int dStride = state.stride;
+		const int dStride = state.destStride;
 		const int sBytes = Surface::bytes(state.sourceFormat);
-		const int sStride = topLeftOrigin ? (sBytes * width2) : -(sBytes * width2);
+		const int sStride = state.sourceStride;
 
 		Function<Void(Pointer<Byte>, Pointer<Byte>, Pointer<Byte>)> function;
 		{

src/Main/FrameBuffer.hpp

@@ -29,7 +29,8 @@ namespace sw
 		int height;
 		Format destFormat;
 		Format sourceFormat;
-		int stride;
+		int destStride;
+		int sourceStride;
 		int cursorWidth;
 		int cursorHeight;
 	};