Disable Vsync while holding tab to disable the frame limit, and allow…

… toggling vsync while emulation is running in OGL.

D3D9 still doesn't support changing vsync while emulation is running.

Fixes issue 6111.

Source/Core/Core/Src/Core.cpp

@@ -104,6 +104,7 @@ static bool g_requestRefreshInfo = false;
 static int g_pauseAndLockDepth = 0;
 
 SCoreStartupParameter g_CoreStartupParameter;
+bool isTabPressed = false;
 
 std::string GetStateFileName() { return g_stateFileName; }
 void SetStateFileName(std::string val) { g_stateFileName = val; }
@@ -603,9 +604,13 @@ void VideoThrottle()
 	u32 TargetVPS = (SConfig::GetInstance().m_Framelimit > 2) ?
 		(SConfig::GetInstance().m_Framelimit - 1) * 5 : VideoInterface::TargetRefreshRate;
 
+	if (Host_GetKeyState('\t'))
+		isTabPressed = true;
+
 	// Disable the frame-limiter when the throttle (Tab) key is held down. Audio throttle: m_Framelimit = 2
 	if (SConfig::GetInstance().m_Framelimit && SConfig::GetInstance().m_Framelimit != 2 && !Host_GetKeyState('\t'))
 	{
+		isTabPressed = false;
 		u32 frametime = ((SConfig::GetInstance().b_UseFPS)? Common::AtomicLoad(DrawnFrame) : DrawnVideo) * 1000 / TargetVPS;
 
 		u32 timeDifference = (u32)Timer.GetTimeDifference();

Source/Core/Core/Src/Core.h

@@ -38,6 +38,8 @@ namespace Core
 // TODO: kill, use SConfig instead
 extern SCoreStartupParameter g_CoreStartupParameter;
 
+extern bool isTabPressed;
+
 void Callback_VideoCopiedToXFB(bool video_update);
 
 enum EState

Source/Core/VideoCommon/Src/VideoConfig.cpp

@@ -22,6 +22,7 @@
 #include "VideoConfig.h"
 #include "VideoCommon.h"
 #include "FileUtil.h"
+#include "Core.h"
 
 VideoConfig g_Config;
 VideoConfig g_ActiveConfig;
@@ -292,3 +293,8 @@ void VideoConfig::GameIniSave(const char* default_ini, const char* game_ini)
 
 	iniFile.Save(game_ini);
 }
+
+bool VideoConfig::IsVSync()
+{
+	return Core::isTabPressed ? false : bVSync;
+}

Source/Core/VideoCommon/Src/VideoConfig.h

@@ -67,6 +67,7 @@ struct VideoConfig
 	void Save(const char *ini_file);
 	void GameIniSave(const char* default_ini, const char* game_ini);
 	void UpdateProjectionHack();
+	bool IsVSync();
 
 	// General
 	bool bVSync;

Source/Plugins/Plugin_VideoDX11/Src/D3DBase.cpp

@@ -520,7 +520,7 @@ void EndFrame()
 void Present()
 {
 	// TODO: Is 1 the correct value for vsyncing?
-	swapchain->Present((UINT)g_ActiveConfig.bVSync, 0);
+	swapchain->Present((UINT)g_ActiveConfig.IsVSync(), 0);
 }
 
 }  // namespace D3D

Source/Plugins/Plugin_VideoDX9/Src/D3DBase.cpp

@@ -223,7 +223,7 @@ void InitPP(int adapter, int f, int aa_mode, D3DPRESENT_PARAMETERS *pp)
 		yres = pp->BackBufferHeight = client.bottom - client.top;
 	}
 	pp->SwapEffect = D3DSWAPEFFECT_DISCARD;
-	pp->PresentationInterval = g_Config.bVSync ? D3DPRESENT_INTERVAL_DEFAULT : D3DPRESENT_INTERVAL_IMMEDIATE;
+	pp->PresentationInterval = g_Config.IsVSync() ? D3DPRESENT_INTERVAL_DEFAULT : D3DPRESENT_INTERVAL_IMMEDIATE;
 	pp->Windowed = !g_Config.b3DVision;
 }
 

Source/Plugins/Plugin_VideoOGL/Src/Render.cpp

@@ -314,7 +314,7 @@ Renderer::Renderer()
 	s_backbuffer_height = (int)GLInterface->GetBackBufferHeight();
 
 	// Handle VSync on/off
-	int swapInterval = g_ActiveConfig.bVSync ? 1 : 0;
+	int swapInterval = g_ActiveConfig.IsVSync() ? 1 : 0;
 	GLInterface->SwapInterval(swapInterval);
 
 	// check the max texture width and height
@@ -1307,6 +1307,8 @@ void Renderer::Swap(u32 xfbAddr, FieldType field, u32 fbWidth, u32 fbHeight,cons
 
 	GL_REPORT_ERRORD();
 
+	GLInterface->SwapInterval(g_ActiveConfig.IsVSync() ? 1 : 0);
+
 	// Clean out old stuff from caches. It's not worth it to clean out the shader caches.
 	DLCache::ProgressiveCleanup();
 	TextureCache::Cleanup();