VideoCommon: rewrite frame skipping code

Source/Core/VideoCommon/Fifo.cpp

@@ -19,7 +19,7 @@
 #include "VideoCommon/PixelEngine.h"
 #include "VideoCommon/VideoConfig.h"
 
-volatile bool g_bSkipCurrentFrame = false;
+bool g_bSkipCurrentFrame = false;
 
 namespace
 {
@@ -173,7 +173,7 @@ void RunGpuLoop()
 
 				ReadDataFromFifo(uData, 32);
 
-				cyclesExecuted = OpcodeDecoder_Run(g_bSkipCurrentFrame, GetVideoBufferEndPtr());
+				cyclesExecuted = OpcodeDecoder_Run(GetVideoBufferEndPtr());
 
 				if (Core::g_CoreStartupParameter.bSyncGPU && Common::AtomicLoad(CommandProcessor::VITicks) > cyclesExecuted)
 					Common::AtomicAdd(CommandProcessor::VITicks, -(s32)cyclesExecuted);
@@ -235,7 +235,7 @@ void RunGpu()
 		FPURoundMode::SaveSIMDState();
 		FPURoundMode::LoadDefaultSIMDState();
 		ReadDataFromFifo(uData, 32);
-		OpcodeDecoder_Run(g_bSkipCurrentFrame, GetVideoBufferEndPtr());
+		OpcodeDecoder_Run(GetVideoBufferEndPtr());
 		FPURoundMode::LoadSIMDState();
 
 		//DEBUG_LOG(COMMANDPROCESSOR, "Fifo wraps to base");

Source/Core/VideoCommon/Fifo.h

@@ -11,7 +11,7 @@ class PointerWrap;
 
 #define FIFO_SIZE (2*1024*1024)
 
-extern volatile bool g_bSkipCurrentFrame;
+extern bool g_bSkipCurrentFrame;
 
 
 void Fifo_Init();

Source/Core/VideoCommon/OpcodeDecoding.cpp

@@ -91,7 +91,7 @@ static u32 InterpretDisplayList(u32 address, u32 size)
 		Statistics::SwapDL();
 
 		u8 *end = g_pVideoData + size;
-		cycles = OpcodeDecoder_Run(false, end);
+		cycles = OpcodeDecoder_Run(end);
 		INCSTAT(stats.thisFrame.numDListsCalled);
 
 		// un-swap
@@ -146,7 +146,7 @@ static void UnknownOpcode(u8 cmd_byte, void *buffer, bool preprocess)
 	}
 }
 
-static u32 Decode(u8* end, bool skipped_frame)
+static u32 Decode(u8* end)
 {
 	u8 *opcodeStart = g_pVideoData;
 	if (g_pVideoData == end)
@@ -221,9 +221,6 @@ static u32 Decode(u8* end, bool skipped_frame)
 				return 0;
 			u32 address = DataReadU32();
 			u32 count = DataReadU32();
-			if (skipped_frame)
-				cycles = 45; // xxx
-			else
 			cycles = 6 + InterpretDisplayList(address, count);
 		}
 		break;
@@ -261,20 +258,13 @@ static u32 Decode(u8* end, bool skipped_frame)
 				return 0;
 			u16 numVertices = DataReadU16();
 
-			if (skipped_frame)
-			{
-				size_t size = numVertices * VertexLoaderManager::GetVertexSize(cmd_byte & GX_VAT_MASK);
-				if ((size_t) (end - g_pVideoData) < size)
-					return 0;
-				DataSkip((u32)size);
-			}
-			else
-			{
 			if (!VertexLoaderManager::RunVertices(
 				cmd_byte & GX_VAT_MASK,   // Vertex loader index (0 - 7)
 				(cmd_byte & GX_PRIMITIVE_MASK) >> GX_PRIMITIVE_SHIFT,
 				numVertices,
-					end - g_pVideoData))
+				end - g_pVideoData,
+				g_bSkipCurrentFrame))
+			{
 				return 0;
 			}
 		}
@@ -311,13 +301,13 @@ void OpcodeDecoder_Shutdown()
 {
 }
 
-u32 OpcodeDecoder_Run(bool skipped_frame, u8* end)
+u32 OpcodeDecoder_Run(u8* end)
 {
 	u32 totalCycles = 0;
 	while (true)
 	{
 		u8* old = g_pVideoData;
-		u32 cycles = Decode(end, skipped_frame);
+		u32 cycles = Decode(end);
 		if (cycles == 0)
 		{
 			g_pVideoData = old;

Source/Core/VideoCommon/OpcodeDecoding.h

@@ -38,4 +38,4 @@ extern bool g_bRecordFifoData;
 
 void OpcodeDecoder_Init();
 void OpcodeDecoder_Shutdown();
-u32 OpcodeDecoder_Run(bool skipped_frame, u8* end);
+u32 OpcodeDecoder_Run(u8* end);

Source/Core/VideoCommon/RenderBase.cpp

@@ -65,7 +65,6 @@ TargetRectangle Renderer::target_rc;
 
 int Renderer::s_LastEFBScale;
 
-bool Renderer::s_skipSwap;
 bool Renderer::XFBWrited;
 
 PEControl::PixelFormat Renderer::prev_efb_format = PEControl::INVALID_FMT;
@@ -113,8 +112,6 @@ void Renderer::RenderToXFB(u32 xfbAddr, const EFBRectangle& sourceRc, u32 fbWidt
 	if (!fbWidth || !fbHeight)
 		return;
 
-	s_skipSwap = g_bSkipCurrentFrame;
-
 	VideoFifo_CheckEFBAccess();
 	VideoFifo_CheckSwapRequestAt(xfbAddr, fbWidth, fbHeight);
 	XFBWrited = true;

Source/Core/VideoCommon/RenderBase.h

@@ -152,7 +152,6 @@ protected:
 	// can probably eliminate this static var
 	static int s_LastEFBScale;
 
-	static bool s_skipSwap;
 	static bool XFBWrited;
 
 	FPSCounter m_fps_counter;

Source/Core/VideoCommon/VertexLoaderManager.cpp

@@ -151,7 +151,7 @@ static VertexLoaderCacheItem RefreshLoader(int vtx_attr_group)
 	return s_VertexLoaders[vtx_attr_group];
 }
 
-bool RunVertices(int vtx_attr_group, int primitive, int count, size_t buf_size)
+bool RunVertices(int vtx_attr_group, int primitive, int count, size_t buf_size, bool skip_drawing)
 {
 	if (!count)
 		return true;
@@ -161,7 +161,7 @@ bool RunVertices(int vtx_attr_group, int primitive, int count, size_t buf_size)
 	if (buf_size < size)
 		return false;
 
-	if (bpmem.genMode.cullmode == GenMode::CULL_ALL && primitive < 5)
+	if (skip_drawing || (bpmem.genMode.cullmode == GenMode::CULL_ALL && primitive < 5))
 	{
 		// if cull mode is CULL_ALL, ignore triangles and quads
 		DataSkip((u32)size);

Source/Core/VideoCommon/VertexLoaderManager.h

@@ -18,7 +18,7 @@ namespace VertexLoaderManager
 
 	int GetVertexSize(int vtx_attr_group);
 	// Returns false if buf_size is insufficient.
-	bool RunVertices(int vtx_attr_group, int primitive, int count, size_t buf_size);
+	bool RunVertices(int vtx_attr_group, int primitive, int count, size_t buf_size, bool skip_drawing = false);
 
 	// For debugging
 	void AppendListToString(std::string *dest);