Frameskipping! Complete with GUI! Even my most naive approach resulted in great speeds, even with graphic-intensive games such as Pikmin.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3949 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/VideoCommon/Src/Fifo.cpp

@@ -24,6 +24,7 @@
 
 #include "Fifo.h"
 
+volatile bool g_bSkipCurrentFrame = false;
 
 extern u8* g_pVideoData;
 
@@ -77,6 +78,10 @@ u8* FAKE_GetFifoEndPtr()
 	return &videoBuffer[size];
 }
 
+void Fifo_SetRendering(bool bEnabled) {
+	g_bSkipCurrentFrame = !bEnabled;
+}
+
 // Executed from another thread, no the graphics thread!
 // Basically, all it does is set a flag so that the loop will eventually exit, then
 // waits for the event to be set, which happens when the loop does exit.

Source/Core/VideoCommon/Src/Fifo.h

@@ -25,6 +25,8 @@
 
 #define FIFO_SIZE (1024*1024)
 
+extern volatile bool g_bSkipCurrentFrame;
+
 void Fifo_Init();
 void Fifo_Shutdown();
 
@@ -37,6 +39,8 @@ void Fifo_ExitLoopNonBlocking();
 
 void Fifo_DoState(PointerWrap &f);
 
+void Fifo_SetRendering(bool bEnabled);
+
 // Implemented by the Video Plugin
 void VideoFifo_CheckSwapRequest();
 void VideoFifo_CheckSwapRequestAt(u32 xfbAddr, u32 fbWidth, u32 fbHeight);

Source/Core/VideoCommon/Src/OpcodeDecoding.cpp

@@ -197,6 +197,7 @@ bool FifoCommandRunnable()
 static void Decode()
 {
     int Cmd = DataReadU8();
+
     switch(Cmd)
     {
     case GX_NOP:
@@ -268,6 +269,7 @@ static void Decode()
         {
             // load vertices (use computed vertex size from FifoCommandRunnable above)
 			u16 numVertices = DataReadU16();
+
 			VertexLoaderManager::RunVertices(
 				Cmd & GX_VAT_MASK,   // Vertex loader index (0 - 7)
 				(Cmd & GX_PRIMITIVE_MASK) >> GX_PRIMITIVE_SHIFT,

Source/Core/VideoCommon/Src/VertexLoaderManager.cpp

@@ -115,6 +115,7 @@ void RunVertices(int vtx_attr_group, int primitive, int count)
 {
 	if (!count)
 		return;
+
 	RefreshLoader(vtx_attr_group);
 	g_VertexLoaders[vtx_attr_group]->RunVertices(vtx_attr_group, primitive, count);
 }