Cocoa Port: Fix a whole slew of synchronization issues in the entire client display system, hopefully improving stability.

- Of special note, Metal display views aren't allowed to run on macOS High Sierra because of an assert bug in [id<MTLDevice> newBufferWithBytesNoCopy:length:options:deallocator:] in this particular version of macOS. Note that Metal display views will continue to work with macOS El Capitan and macOS Sierra.

desmume/src/frontend/cocoa/ClientDisplayView.cpp

@@ -72,8 +72,8 @@ void ClientDisplayPresenter::__InstanceInit(const ClientDisplayPresenterProperti
 	
 	_displaySourceSelect[NDSDisplayID_Main]  = ClientDisplaySource_DeterminedByNDS;
 	_displaySourceSelect[NDSDisplayID_Touch] = ClientDisplaySource_DeterminedByNDS;
-	_isSelectedDisplayEnabled[NDSDisplayID_Main]  = true;
+	_isSelectedDisplayEnabled[NDSDisplayID_Main]  = false;
-	_isSelectedDisplayEnabled[NDSDisplayID_Touch] = true;
+	_isSelectedDisplayEnabled[NDSDisplayID_Touch] = false;
 	_selectedSourceForDisplay[NDSDisplayID_Main]  = NDSDisplayID_Main;
 	_selectedSourceForDisplay[NDSDisplayID_Touch] = NDSDisplayID_Touch;
 	
@@ -820,7 +820,7 @@ void ClientDisplayPresenter::LoadDisplays()
 			
 		case ClientDisplaySource_EngineMain:
 		{
-			if ( (this->_emuDisplayInfo.engineID[NDSDisplayID_Main] == GPUEngineID_Main) && (mainDisplaySrc == ClientDisplaySource_EngineMain) )
+			if (this->_emuDisplayInfo.engineID[NDSDisplayID_Main] == GPUEngineID_Main)
 			{
 				this->_selectedSourceForDisplay[NDSDisplayID_Main] = NDSDisplayID_Main;
 				this->_isSelectedDisplayEnabled[NDSDisplayID_Main] = this->_emuDisplayInfo.isDisplayEnabled[NDSDisplayID_Main];
@@ -835,7 +835,7 @@ void ClientDisplayPresenter::LoadDisplays()
 			
 		case ClientDisplaySource_EngineSub:
 		{
-			if ( (this->_emuDisplayInfo.engineID[NDSDisplayID_Main] == GPUEngineID_Sub)  && (mainDisplaySrc == ClientDisplaySource_EngineSub) )
+			if (this->_emuDisplayInfo.engineID[NDSDisplayID_Main] == GPUEngineID_Sub)
 			{
 				this->_selectedSourceForDisplay[NDSDisplayID_Main] = NDSDisplayID_Main;
 				this->_isSelectedDisplayEnabled[NDSDisplayID_Main] = this->_emuDisplayInfo.isDisplayEnabled[NDSDisplayID_Main];
@@ -863,7 +863,7 @@ void ClientDisplayPresenter::LoadDisplays()
 			
 		case ClientDisplaySource_EngineMain:
 		{
-			if ( (this->_emuDisplayInfo.engineID[NDSDisplayID_Touch] == GPUEngineID_Main) && (touchDisplaySrc == ClientDisplaySource_EngineMain) )
+			if (this->_emuDisplayInfo.engineID[NDSDisplayID_Touch] == GPUEngineID_Main)
 			{
 				this->_selectedSourceForDisplay[NDSDisplayID_Touch] = NDSDisplayID_Touch;
 				this->_isSelectedDisplayEnabled[NDSDisplayID_Touch] = this->_emuDisplayInfo.isDisplayEnabled[NDSDisplayID_Touch];
@@ -878,7 +878,7 @@ void ClientDisplayPresenter::LoadDisplays()
 			
 		case ClientDisplaySource_EngineSub:
 		{
-			if ( (this->_emuDisplayInfo.engineID[NDSDisplayID_Touch] == GPUEngineID_Sub)  && (touchDisplaySrc == ClientDisplaySource_EngineSub) )
+			if (this->_emuDisplayInfo.engineID[NDSDisplayID_Touch] == GPUEngineID_Sub)
 			{
 				this->_selectedSourceForDisplay[NDSDisplayID_Touch] = NDSDisplayID_Touch;
 				this->_isSelectedDisplayEnabled[NDSDisplayID_Touch] = this->_emuDisplayInfo.isDisplayEnabled[NDSDisplayID_Touch];
@@ -960,11 +960,6 @@ void ClientDisplayPresenter::CopyFrameToBuffer(uint32_t *dstBuffer)
 	// Do nothing. This is implementation dependent.
 }
 
-void ClientDisplayPresenter::FinishFrameAtIndex(const uint8_t bufferIndex)
-{
-	// Do nothing. This is implementation dependent.
-}
-
 const NDSDisplayInfo& ClientDisplayPresenter::GetEmuDisplayInfo() const
 {
 	return this->_emuDisplayInfo;

desmume/src/frontend/cocoa/ClientDisplayView.h

@@ -301,7 +301,6 @@ public:
 	virtual void LoadDisplays();
 	virtual void ProcessDisplays();
 	virtual void UpdateLayout();
-	virtual void FinishFrameAtIndex(const uint8_t bufferIndex);
 	
 	virtual void CopyFrameToBuffer(uint32_t *dstBuffer);
 	

desmume/src/frontend/cocoa/OGLDisplayOutput.cpp

@@ -4551,6 +4551,9 @@ OGLClientFetchObject::OGLClientFetchObject()
 	pthread_rwlock_init(&_srcCloneRWLock[NDSDisplayID_Main][1],  NULL);
 	pthread_rwlock_init(&_srcCloneRWLock[NDSDisplayID_Touch][1], NULL);
 	
+	pthread_rwlock_init(&_texFetchRWLock[NDSDisplayID_Main],  NULL);
+	pthread_rwlock_init(&_texFetchRWLock[NDSDisplayID_Touch], NULL);
+	
 	_srcNativeCloneMaster = (uint32_t *)malloc_alignedPage(GPU_FRAMEBUFFER_NATIVE_WIDTH * GPU_FRAMEBUFFER_NATIVE_HEIGHT * 2 * 2 * sizeof(uint32_t));
 	_srcNativeClone[NDSDisplayID_Main][0]  = _srcNativeCloneMaster + (GPU_FRAMEBUFFER_NATIVE_WIDTH * GPU_FRAMEBUFFER_NATIVE_HEIGHT * 0);
 	_srcNativeClone[NDSDisplayID_Touch][0] = _srcNativeCloneMaster + (GPU_FRAMEBUFFER_NATIVE_WIDTH * GPU_FRAMEBUFFER_NATIVE_HEIGHT * 1);
@@ -4593,6 +4596,9 @@ OGLClientFetchObject::~OGLClientFetchObject()
 	pthread_rwlock_destroy(&this->_srcCloneRWLock[NDSDisplayID_Touch][0]);
 	pthread_rwlock_destroy(&this->_srcCloneRWLock[NDSDisplayID_Main][1]);
 	pthread_rwlock_destroy(&this->_srcCloneRWLock[NDSDisplayID_Touch][1]);
+	
+	pthread_rwlock_destroy(&this->_texFetchRWLock[NDSDisplayID_Main]);
+	pthread_rwlock_destroy(&this->_texFetchRWLock[NDSDisplayID_Touch]);
 }
 
 OGLContextInfo* OGLClientFetchObject::GetContextInfo() const
@@ -4675,6 +4681,21 @@ void OGLClientFetchObject::FetchNativeDisplayToSrcClone(const NDSDisplayID displ
 	}
 }
 
+void OGLClientFetchObject::FetchTextureWriteLock(const NDSDisplayID displayID)
+{
+	pthread_rwlock_wrlock(&this->_texFetchRWLock[displayID]);
+}
+
+void OGLClientFetchObject::FetchTextureReadLock(const NDSDisplayID displayID)
+{
+	pthread_rwlock_rdlock(&this->_texFetchRWLock[displayID]);
+}
+
+void OGLClientFetchObject::FetchTextureUnlock(const NDSDisplayID displayID)
+{
+	pthread_rwlock_unlock(&this->_texFetchRWLock[displayID]);
+}
+
 void OGLClientFetchObject::Init()
 {
 	glGenTextures(4, &this->_texDisplayFetchNative[0][0]);
@@ -4738,6 +4759,9 @@ void OGLClientFetchObject::Init()
 	
 	glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
 	
+	this->_texFetch[NDSDisplayID_Main]  = this->_texDisplayFetchNative[NDSDisplayID_Main][0];
+	this->_texFetch[NDSDisplayID_Touch] = this->_texDisplayFetchNative[NDSDisplayID_Touch][0];
+	
 	if (this->_contextInfo->IsShaderSupported())
 	{
 		SetupHQnxLUTs_OGL(GL_TEXTURE0 + 1, this->_texLQ2xLUT, this->_texHQ2xLUT, this->_texHQ3xLUT, this->_texHQ4xLUT);
@@ -4751,15 +4775,28 @@ void OGLClientFetchObject::Init()
 
 void OGLClientFetchObject::SetFetchBuffers(const NDSDisplayInfo &currentDisplayInfo)
 {
+	const size_t nativeSize = GPU_FRAMEBUFFER_NATIVE_WIDTH * GPU_FRAMEBUFFER_NATIVE_HEIGHT * currentDisplayInfo.pixelBytes;
+	const size_t customSize = currentDisplayInfo.customWidth * currentDisplayInfo.customHeight * currentDisplayInfo.pixelBytes;
+	
+	this->_fetchDisplayInfo[0] = currentDisplayInfo;
+	this->_fetchDisplayInfo[1] = currentDisplayInfo;
+	
+	this->_fetchDisplayInfo[0].nativeBuffer[NDSDisplayID_Main]  = (u8 *)currentDisplayInfo.masterFramebufferHead;
+	this->_fetchDisplayInfo[0].nativeBuffer[NDSDisplayID_Touch] = (u8 *)currentDisplayInfo.masterFramebufferHead + (nativeSize * 1);
+	this->_fetchDisplayInfo[0].customBuffer[NDSDisplayID_Main]  = (u8 *)currentDisplayInfo.masterFramebufferHead + (nativeSize * 2);
+	this->_fetchDisplayInfo[0].customBuffer[NDSDisplayID_Touch] = (u8 *)currentDisplayInfo.masterFramebufferHead + (nativeSize * 2) + customSize;
+	
+	this->_fetchDisplayInfo[1].nativeBuffer[NDSDisplayID_Main]  = (u8 *)this->_fetchDisplayInfo[0].nativeBuffer[NDSDisplayID_Main]  + currentDisplayInfo.framebufferSize;
+	this->_fetchDisplayInfo[1].nativeBuffer[NDSDisplayID_Touch] = (u8 *)this->_fetchDisplayInfo[0].nativeBuffer[NDSDisplayID_Touch] + currentDisplayInfo.framebufferSize;
+	this->_fetchDisplayInfo[1].customBuffer[NDSDisplayID_Main]  = (u8 *)this->_fetchDisplayInfo[0].customBuffer[NDSDisplayID_Main]  + currentDisplayInfo.framebufferSize;
+	this->_fetchDisplayInfo[1].customBuffer[NDSDisplayID_Touch] = (u8 *)this->_fetchDisplayInfo[0].customBuffer[NDSDisplayID_Touch] + currentDisplayInfo.framebufferSize;
+	
 #ifdef MSB_FIRST
 	this->_fetchColorFormatOGL = (currentDisplayInfo.pixelBytes == 2) ? GL_UNSIGNED_SHORT_1_5_5_5_REV : GL_UNSIGNED_INT_8_8_8_8;
 #else
 	this->_fetchColorFormatOGL = (currentDisplayInfo.pixelBytes == 2) ? GL_UNSIGNED_SHORT_1_5_5_5_REV : GL_UNSIGNED_INT_8_8_8_8_REV;
 #endif
 	
-	const size_t nativeSize = GPU_FRAMEBUFFER_NATIVE_WIDTH * GPU_FRAMEBUFFER_NATIVE_HEIGHT * currentDisplayInfo.pixelBytes;
-	const size_t customSize = currentDisplayInfo.customWidth * currentDisplayInfo.customHeight * currentDisplayInfo.pixelBytes;
-	
 	glFinish();
 	
 	glTextureRangeAPPLE(GL_TEXTURE_RECTANGLE_ARB, currentDisplayInfo.framebufferSize * 2, currentDisplayInfo.masterFramebufferHead);
@@ -4767,35 +4804,35 @@ void OGLClientFetchObject::SetFetchBuffers(const NDSDisplayInfo &currentDisplayI
 	
 	glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texDisplayFetchNative[NDSDisplayID_Main][0]);
 	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_STORAGE_HINT_APPLE, GL_STORAGE_SHARED_APPLE);
-	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, GPU_FRAMEBUFFER_NATIVE_WIDTH, GPU_FRAMEBUFFER_NATIVE_HEIGHT, 0, GL_RGBA, this->_fetchColorFormatOGL, (u8 *)currentDisplayInfo.masterFramebufferHead);
+	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, GPU_FRAMEBUFFER_NATIVE_WIDTH, GPU_FRAMEBUFFER_NATIVE_HEIGHT, 0, GL_RGBA, this->_fetchColorFormatOGL, this->_fetchDisplayInfo[0].nativeBuffer[NDSDisplayID_Main]);
 	
 	glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texDisplayFetchNative[NDSDisplayID_Main][1]);
 	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_STORAGE_HINT_APPLE, GL_STORAGE_SHARED_APPLE);
-	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, GPU_FRAMEBUFFER_NATIVE_WIDTH, GPU_FRAMEBUFFER_NATIVE_HEIGHT, 0, GL_RGBA, this->_fetchColorFormatOGL, (u8 *)currentDisplayInfo.masterFramebufferHead + currentDisplayInfo.framebufferSize);
+	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, GPU_FRAMEBUFFER_NATIVE_WIDTH, GPU_FRAMEBUFFER_NATIVE_HEIGHT, 0, GL_RGBA, this->_fetchColorFormatOGL, this->_fetchDisplayInfo[1].nativeBuffer[NDSDisplayID_Main]);
 	
 	glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texDisplayFetchNative[NDSDisplayID_Touch][0]);
 	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_STORAGE_HINT_APPLE, GL_STORAGE_SHARED_APPLE);
-	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, GPU_FRAMEBUFFER_NATIVE_WIDTH, GPU_FRAMEBUFFER_NATIVE_HEIGHT, 0, GL_RGBA, this->_fetchColorFormatOGL, (u8 *)currentDisplayInfo.masterFramebufferHead + (nativeSize * 1));
+	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, GPU_FRAMEBUFFER_NATIVE_WIDTH, GPU_FRAMEBUFFER_NATIVE_HEIGHT, 0, GL_RGBA, this->_fetchColorFormatOGL, this->_fetchDisplayInfo[0].nativeBuffer[NDSDisplayID_Touch]);
 	
 	glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texDisplayFetchNative[NDSDisplayID_Touch][1]);
 	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_STORAGE_HINT_APPLE, GL_STORAGE_SHARED_APPLE);
-	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, GPU_FRAMEBUFFER_NATIVE_WIDTH, GPU_FRAMEBUFFER_NATIVE_HEIGHT, 0, GL_RGBA, this->_fetchColorFormatOGL, (u8 *)currentDisplayInfo.masterFramebufferHead + (nativeSize * 1) + currentDisplayInfo.framebufferSize);
+	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, GPU_FRAMEBUFFER_NATIVE_WIDTH, GPU_FRAMEBUFFER_NATIVE_HEIGHT, 0, GL_RGBA, this->_fetchColorFormatOGL, this->_fetchDisplayInfo[1].nativeBuffer[NDSDisplayID_Touch]);
 	
 	glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texDisplayFetchCustom[NDSDisplayID_Main][0]);
 	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_STORAGE_HINT_APPLE, GL_STORAGE_SHARED_APPLE);
-	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, currentDisplayInfo.customWidth, currentDisplayInfo.customHeight, 0, GL_RGBA, this->_fetchColorFormatOGL, (u8 *)currentDisplayInfo.masterFramebufferHead + (nativeSize * 2));
+	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, currentDisplayInfo.customWidth, currentDisplayInfo.customHeight, 0, GL_RGBA, this->_fetchColorFormatOGL, this->_fetchDisplayInfo[0].customBuffer[NDSDisplayID_Main]);
 	
 	glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texDisplayFetchCustom[NDSDisplayID_Main][1]);
 	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_STORAGE_HINT_APPLE, GL_STORAGE_SHARED_APPLE);
-	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, currentDisplayInfo.customWidth, currentDisplayInfo.customHeight, 0, GL_RGBA, this->_fetchColorFormatOGL, (u8 *)currentDisplayInfo.masterFramebufferHead + (nativeSize * 2) + currentDisplayInfo.framebufferSize);
+	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, currentDisplayInfo.customWidth, currentDisplayInfo.customHeight, 0, GL_RGBA, this->_fetchColorFormatOGL, this->_fetchDisplayInfo[1].customBuffer[NDSDisplayID_Main]);
 	
 	glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texDisplayFetchCustom[NDSDisplayID_Touch][0]);
 	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_STORAGE_HINT_APPLE, GL_STORAGE_SHARED_APPLE);
-	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, currentDisplayInfo.customWidth, currentDisplayInfo.customHeight, 0, GL_RGBA, this->_fetchColorFormatOGL, (u8 *)currentDisplayInfo.masterFramebufferHead + (nativeSize * 2) + customSize);
+	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, currentDisplayInfo.customWidth, currentDisplayInfo.customHeight, 0, GL_RGBA, this->_fetchColorFormatOGL, this->_fetchDisplayInfo[0].customBuffer[NDSDisplayID_Touch]);
 	
 	glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texDisplayFetchCustom[NDSDisplayID_Touch][1]);
 	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_STORAGE_HINT_APPLE, GL_STORAGE_SHARED_APPLE);
-	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, currentDisplayInfo.customWidth, currentDisplayInfo.customHeight, 0, GL_RGBA, this->_fetchColorFormatOGL, (u8 *)currentDisplayInfo.masterFramebufferHead + (nativeSize * 2) + customSize + currentDisplayInfo.framebufferSize);
+	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, currentDisplayInfo.customWidth, currentDisplayInfo.customHeight, 0, GL_RGBA, this->_fetchColorFormatOGL, this->_fetchDisplayInfo[1].customBuffer[NDSDisplayID_Touch]);
 	
 	glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
 	
@@ -4818,6 +4855,45 @@ void OGLClientFetchObject::SetFetchBuffers(const NDSDisplayInfo &currentDisplayI
 	pthread_rwlock_unlock(&this->_srcCloneRWLock[NDSDisplayID_Touch][1]);
 }
 
+void OGLClientFetchObject::FetchFromBufferIndex(const u8 index)
+{
+	GPUClientFetchObject::FetchFromBufferIndex(index);
+	glFlush();
+	
+	GLuint texFetchMain = 0;
+	GLuint texFetchTouch = 0;
+	const NDSDisplayInfo &currentDisplayInfo = this->GetFetchDisplayInfoForBufferIndex(index);
+	const bool isMainEnabled  = currentDisplayInfo.isDisplayEnabled[NDSDisplayID_Main];
+	const bool isTouchEnabled = currentDisplayInfo.isDisplayEnabled[NDSDisplayID_Touch];
+	
+	if (isMainEnabled)
+	{
+		if (!currentDisplayInfo.didPerformCustomRender[NDSDisplayID_Main])
+		{
+			texFetchMain = this->_texDisplayFetchNative[NDSDisplayID_Main][index];
+		}
+		else
+		{
+			texFetchMain = this->_texDisplayFetchCustom[NDSDisplayID_Main][index];
+		}
+	}
+	
+	if (isTouchEnabled)
+	{
+		if (!currentDisplayInfo.didPerformCustomRender[NDSDisplayID_Touch])
+		{
+			texFetchTouch = this->_texDisplayFetchNative[NDSDisplayID_Touch][index];
+		}
+		else
+		{
+			texFetchTouch = this->_texDisplayFetchCustom[NDSDisplayID_Touch][index];
+		}
+	}
+	
+	this->SetFetchTexture(NDSDisplayID_Main,  texFetchMain);
+	this->SetFetchTexture(NDSDisplayID_Touch, texFetchTouch);
+}
+
 void OGLClientFetchObject::_FetchNativeDisplayByID(const NDSDisplayID displayID, const u8 bufferIndex)
 {
 	pthread_rwlock_wrlock(&this->_srcCloneRWLock[displayID][bufferIndex]);
@@ -4840,6 +4916,16 @@ void OGLClientFetchObject::_FetchCustomDisplayByID(const NDSDisplayID displayID,
 	glTexSubImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, this->_fetchDisplayInfo[bufferIndex].customWidth, this->_fetchDisplayInfo[bufferIndex].customHeight, GL_RGBA, this->_fetchColorFormatOGL, this->_fetchDisplayInfo[bufferIndex].customBuffer[displayID]);
 }
 
+GLuint OGLClientFetchObject::GetFetchTexture(const NDSDisplayID displayID)
+{
+	return this->_texFetch[displayID];
+}
+
+void OGLClientFetchObject::SetFetchTexture(const NDSDisplayID displayID, GLuint texID)
+{
+	this->_texFetch[displayID] = texID;
+}
+
 #pragma mark -
 
 OGLVideoOutput::OGLVideoOutput()
@@ -4854,6 +4940,12 @@ OGLVideoOutput::OGLVideoOutput()
 	_texCPUFilterDstID[NDSDisplayID_Touch] = 0;
 	_fboFrameCopyID = 0;
 	
+	_processedFrameInfo.bufferIndex = 0;
+	_processedFrameInfo.texID[NDSDisplayID_Main]  = 0;
+	_processedFrameInfo.texID[NDSDisplayID_Touch] = 0;
+	_processedFrameInfo.isMainDisplayProcessed = false;
+	_processedFrameInfo.isTouchDisplayProcessed = false;
+	
 	_layerList = new std::vector<OGLVideoLayer *>;
 	_layerList->reserve(8);
 }
@@ -5084,19 +5176,6 @@ void OGLVideoOutput::ProcessDisplays()
 	}
 }
 
-void OGLVideoOutput::FinishFrameAtIndex(const uint8_t bufferIndex)
-{
-	for (size_t i = 0; i < _layerList->size(); i++)
-	{
-		OGLVideoLayer *theLayer = (*_layerList)[i];
-		
-		if (theLayer->IsVisible())
-		{
-			theLayer->FinishOGL(bufferIndex);
-		}
-	}
-}
-
 void OGLVideoOutput::CopyFrameToBuffer(uint32_t *dstBuffer)
 {
 	GLuint texFrameCopyID = 0;
@@ -5149,12 +5228,27 @@ void OGLVideoOutput::RenderFrameOGL(bool isRenderingFlipped)
 	}
 }
 
-void OGLVideoOutput::LockDisplayTextures()
+const OGLProcessedFrameInfo& OGLVideoOutput::GetProcessedFrameInfo()
+{
+	return this->_processedFrameInfo;
+}
+
+void OGLVideoOutput::SetProcessedFrameInfo(const OGLProcessedFrameInfo &processedInfo)
+{
+	this->_processedFrameInfo = processedInfo;
+}
+
+void OGLVideoOutput::WriteLockEmuFramebuffer(const uint8_t bufferIndex)
 {
 	// Do nothing. This is implementation dependent.
 }
 
-void OGLVideoOutput::UnlockDisplayTextures()
+void OGLVideoOutput::ReadLockEmuFramebuffer(const uint8_t bufferIndex)
+{
+	// Do nothing. This is implementation dependent.
+}
+
+void OGLVideoOutput::UnlockEmuFramebuffer(const uint8_t bufferIndex)
 {
 	// Do nothing. This is implementation dependent.
 }
@@ -6568,8 +6662,10 @@ OGLDisplayLayer::OGLDisplayLayer(OGLVideoOutput *oglVO)
 	_displayTexFilter[0] = GL_NEAREST;
 	_displayTexFilter[1] = GL_NEAREST;
 	
-	_texVideoOutputID[0] = 0;
+	pthread_rwlock_init(&_cpuFilterRWLock[NDSDisplayID_Main][0],  NULL);
-	_texVideoOutputID[1] = 0;
+	pthread_rwlock_init(&_cpuFilterRWLock[NDSDisplayID_Touch][0], NULL);
+	pthread_rwlock_init(&_cpuFilterRWLock[NDSDisplayID_Main][1],  NULL);
+	pthread_rwlock_init(&_cpuFilterRWLock[NDSDisplayID_Touch][1], NULL);
 	
 	// Set up VBOs
 	glGenBuffersARB(1, &_vboVertexID);
@@ -6676,6 +6772,11 @@ OGLDisplayLayer::~OGLDisplayLayer()
 		delete this->_shaderFilter[0];
 		delete this->_shaderFilter[1];
 	}
+	
+	pthread_rwlock_destroy(&this->_cpuFilterRWLock[NDSDisplayID_Main][0]);
+	pthread_rwlock_destroy(&this->_cpuFilterRWLock[NDSDisplayID_Touch][0]);
+	pthread_rwlock_destroy(&this->_cpuFilterRWLock[NDSDisplayID_Main][1]);
+	pthread_rwlock_destroy(&this->_cpuFilterRWLock[NDSDisplayID_Touch][1]);
 }
 
 void OGLDisplayLayer::_UpdateRotationScaleOGL()
@@ -7062,110 +7163,237 @@ void OGLDisplayLayer::LoadNativeDisplayByID_OGL(const NDSDisplayID displayID)
 		OGLClientFetchObject &fetchObjMutable = (OGLClientFetchObject &)this->_output->GetFetchObject();
 		VideoFilter *vf = this->_output->GetPixelScalerObject(displayID);
 		
-		fetchObjMutable.CopyFromSrcClone(vf->GetSrcBufferPtr(), displayID, this->_output->GetEmuDisplayInfo().bufferIndex);
+		const uint8_t bufferIndex = fetchObjMutable.GetLastFetchIndex();
-	}
-}
 		
-void OGLDisplayLayer::_ProcessDisplayByID(const NDSDisplayID displayID, GLsizei &inoutWidth, GLsizei &inoutHeight, GLuint &inoutTexID)
+		pthread_rwlock_wrlock(&this->_cpuFilterRWLock[displayID][bufferIndex]);
-{
+		fetchObjMutable.CopyFromSrcClone(vf->GetSrcBufferPtr(), displayID, bufferIndex);
-	VideoFilter *vf = this->_output->GetPixelScalerObject(displayID);
+		pthread_rwlock_unlock(&this->_cpuFilterRWLock[displayID][bufferIndex]);
-	const bool willFilterOnGPU = this->_output->WillFilterOnGPU();
-	const bool useDeposterize = this->_output->GetSourceDeposterize();
-	
-	// Source
-	if (useDeposterize)
-	{
-		// For all shader-based filters, we need to temporarily disable GL_UNPACK_CLIENT_STORAGE_APPLE.
-		// Filtered images are supposed to remain on the GPU for immediate use for further GPU processing,
-		// so using client-backed buffers for filtered images would simply waste memory here.
-		glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_FALSE);
-		inoutTexID = this->_filterDeposterize[displayID]->RunFilterOGL(inoutTexID);
-		glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
-		
-		if ((this->_output->GetPixelScaler() != VideoFilterTypeID_None) && !willFilterOnGPU) // Hybrid CPU/GPU-based path (may cause a performance hit on pixel download)
-		{
-			this->_filterDeposterize[displayID]->DownloadDstBufferOGL(vf->GetSrcBufferPtr(), 0, vf->GetSrcHeight());
-		}
-	}
-	
-	// Pixel scaler
-	if (this->_output->GetPixelScaler() != VideoFilterTypeID_None)
-	{
-		if (willFilterOnGPU)
-		{
-			glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_FALSE);
-			inoutTexID = this->_shaderFilter[displayID]->RunFilterOGL(inoutTexID);
-			glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
-			
-			inoutWidth  = vf->GetDstWidth();
-			inoutHeight = vf->GetDstHeight();
-		}
-		else
-		{
-			uint32_t *texData = vf->RunFilter();
-			inoutTexID = this->_output->GetTexCPUFilterDstID(displayID);
-			glBindTexture(GL_TEXTURE_RECTANGLE_ARB, inoutTexID);
-			glTexSubImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, vf->GetDstWidth(), vf->GetDstHeight(), GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, texData);
-			
-			inoutWidth  = (GLsizei)vf->GetDstWidth();
-			inoutHeight = (GLsizei)vf->GetDstHeight();
-		}
 	}
 }
 
 void OGLDisplayLayer::ProcessOGL()
 {
-	const OGLClientFetchObject &fetchObj = (const OGLClientFetchObject &)this->_output->GetFetchObject();
+	OGLClientFetchObject &fetchObj = (OGLClientFetchObject &)this->_output->GetFetchObject();
+	const uint8_t bufferIndex = fetchObj.GetLastFetchIndex();
 	const NDSDisplayInfo &emuDisplayInfo = this->_output->GetEmuDisplayInfo();
 	const ClientDisplayMode mode = this->_output->GetPresenterProperties().mode;
+	const bool useDeposterize = this->_output->GetSourceDeposterize();
 	const NDSDisplayID selectedDisplaySource[2] = { this->_output->GetSelectedDisplaySourceForDisplay(NDSDisplayID_Main), this->_output->GetSelectedDisplaySourceForDisplay(NDSDisplayID_Touch) };
 	
 	const bool didRenderNative[2] = { !emuDisplayInfo.didPerformCustomRender[selectedDisplaySource[NDSDisplayID_Main]], !emuDisplayInfo.didPerformCustomRender[selectedDisplaySource[NDSDisplayID_Touch]] };
-	GLuint texVideoSourceID[2]	= { (didRenderNative[NDSDisplayID_Main])  ? fetchObj.GetTexNative(selectedDisplaySource[NDSDisplayID_Main],  emuDisplayInfo.bufferIndex) : fetchObj.GetTexCustom(selectedDisplaySource[NDSDisplayID_Main],  emuDisplayInfo.bufferIndex),
+
-								    (didRenderNative[NDSDisplayID_Touch]) ? fetchObj.GetTexNative(selectedDisplaySource[NDSDisplayID_Touch], emuDisplayInfo.bufferIndex) : fetchObj.GetTexCustom(selectedDisplaySource[NDSDisplayID_Touch], emuDisplayInfo.bufferIndex) };
+	GLuint texMain  = (selectedDisplaySource[NDSDisplayID_Main]  == NDSDisplayID_Main)  ? fetchObj.GetFetchTexture(NDSDisplayID_Main)  : fetchObj.GetFetchTexture(NDSDisplayID_Touch);
+	GLuint texTouch = (selectedDisplaySource[NDSDisplayID_Touch] == NDSDisplayID_Touch) ? fetchObj.GetFetchTexture(NDSDisplayID_Touch) : fetchObj.GetFetchTexture(NDSDisplayID_Main);
+	
 	GLsizei width[2]  = { emuDisplayInfo.renderedWidth[selectedDisplaySource[NDSDisplayID_Main]],  emuDisplayInfo.renderedWidth[selectedDisplaySource[NDSDisplayID_Touch]] };
 	GLsizei height[2] = { emuDisplayInfo.renderedHeight[selectedDisplaySource[NDSDisplayID_Main]], emuDisplayInfo.renderedHeight[selectedDisplaySource[NDSDisplayID_Touch]] };
 	
-	if (emuDisplayInfo.pixelBytes != 0)
+	VideoFilter *vfMain  = this->_output->GetPixelScalerObject(NDSDisplayID_Main);
+	VideoFilter *vfTouch = this->_output->GetPixelScalerObject(NDSDisplayID_Touch);
+	
+	bool isDisplayProcessedMain  = false;
+	bool isDisplayProcessedTouch = false;
+	
+	if ( (emuDisplayInfo.pixelBytes != 0) && (useDeposterize || (this->_output->GetPixelScaler() != VideoFilterTypeID_None)) )
 	{
 		// Run the video source filters and the pixel scalers
 		const bool willFilterOnGPU = this->_output->WillFilterOnGPU();
-		const bool useDeposterize = this->_output->GetSourceDeposterize();
+		const bool shouldProcessDisplay[2] = { (didRenderNative[NDSDisplayID_Main]  || !emuDisplayInfo.isCustomSizeRequested) && this->_output->IsSelectedDisplayEnabled(NDSDisplayID_Main)  && (mode == ClientDisplayMode_Main  || mode == ClientDisplayMode_Dual),
-		const bool needProcessDisplay[2] = { (didRenderNative[NDSDisplayID_Main]  || !emuDisplayInfo.isCustomSizeRequested) && this->_output->IsSelectedDisplayEnabled(NDSDisplayID_Main)  && (mode == ClientDisplayMode_Main  || mode == ClientDisplayMode_Dual),
 		                                       (didRenderNative[NDSDisplayID_Touch] || !emuDisplayInfo.isCustomSizeRequested) && this->_output->IsSelectedDisplayEnabled(NDSDisplayID_Touch) && (mode == ClientDisplayMode_Touch || mode == ClientDisplayMode_Dual) && (selectedDisplaySource[NDSDisplayID_Main] != selectedDisplaySource[NDSDisplayID_Touch]) };
-		const bool needsLock = (willFilterOnGPU || useDeposterize) && (needProcessDisplay[NDSDisplayID_Main] || needProcessDisplay[NDSDisplayID_Touch]);
 		
-		if (needsLock)
+		bool texFetchMainNeedsLock  = (useDeposterize || ((this->_output->GetPixelScaler() != VideoFilterTypeID_None) && willFilterOnGPU)) && shouldProcessDisplay[NDSDisplayID_Main];
+		bool texFetchTouchNeedsLock = (useDeposterize || ((this->_output->GetPixelScaler() != VideoFilterTypeID_None) && willFilterOnGPU)) && shouldProcessDisplay[NDSDisplayID_Touch];
+		bool needsFetchBuffersLock = texFetchMainNeedsLock || texFetchTouchNeedsLock;
+		
+		if (needsFetchBuffersLock)
 		{
-			this->_output->LockDisplayTextures();
+			this->_output->ReadLockEmuFramebuffer(bufferIndex);
 		}
 		
-		if (needProcessDisplay[NDSDisplayID_Main])
+		if (useDeposterize)
 		{
-			this->_ProcessDisplayByID(NDSDisplayID_Main,  width[NDSDisplayID_Main],  height[NDSDisplayID_Main],  texVideoSourceID[NDSDisplayID_Main]);
+			if (shouldProcessDisplay[NDSDisplayID_Main])
+			{
+				if (texFetchMainNeedsLock)
+				{
+					fetchObj.FetchTextureReadLock(NDSDisplayID_Main);
 				}
 				
-		if (needProcessDisplay[NDSDisplayID_Touch])
+				// For all shader-based filters, we need to temporarily disable GL_UNPACK_CLIENT_STORAGE_APPLE.
+				// Filtered images are supposed to remain on the GPU for immediate use for further GPU processing,
+				// so using client-backed buffers for filtered images would simply waste memory here.
+				glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_FALSE);
+				texMain = this->_filterDeposterize[NDSDisplayID_Main]->RunFilterOGL(texMain);
+				glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
+				
+				if (texFetchMainNeedsLock)
 				{
-			this->_ProcessDisplayByID(NDSDisplayID_Touch, width[NDSDisplayID_Touch], height[NDSDisplayID_Touch], texVideoSourceID[NDSDisplayID_Touch]);
+					fetchObj.FetchTextureUnlock(NDSDisplayID_Main);
 				}
 				
-		if (needsLock)
+				isDisplayProcessedMain = true;
+				texFetchMainNeedsLock = false;
+				
+				if (selectedDisplaySource[NDSDisplayID_Main] == selectedDisplaySource[NDSDisplayID_Touch])
 				{
-			this->_output->UnlockDisplayTextures();
+					isDisplayProcessedTouch = true;
+					texFetchTouchNeedsLock = false;
+				}
+			}
+			
+			if (shouldProcessDisplay[NDSDisplayID_Touch])
+			{
+				if (texFetchTouchNeedsLock)
+				{
+					fetchObj.FetchTextureReadLock(NDSDisplayID_Touch);
+				}
+				
+				glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_FALSE);
+				texTouch = this->_filterDeposterize[NDSDisplayID_Touch]->RunFilterOGL(texTouch);
+				glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
+				
+				if (texFetchTouchNeedsLock)
+				{
+					fetchObj.FetchTextureUnlock(NDSDisplayID_Touch);
+				}
+				
+				isDisplayProcessedTouch = true;
+				texFetchTouchNeedsLock = false;
+			}
+			
+			if (needsFetchBuffersLock && (!shouldProcessDisplay[NDSDisplayID_Main] || isDisplayProcessedMain) && (!shouldProcessDisplay[NDSDisplayID_Touch] || isDisplayProcessedTouch))
+			{
+				glFinish();
+				needsFetchBuffersLock = false;
+				this->_output->UnlockEmuFramebuffer(bufferIndex);
+			}
+		}
+		
+		// Run the pixel scalers. First attempt on the GPU.
+		if ( (this->_output->GetPixelScaler() != VideoFilterTypeID_None) && willFilterOnGPU )
+		{
+			if (shouldProcessDisplay[NDSDisplayID_Main])
+			{
+				if (texFetchMainNeedsLock)
+				{
+					fetchObj.FetchTextureReadLock(NDSDisplayID_Main);
+				}
+				
+				glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_FALSE);
+				texMain = this->_shaderFilter[NDSDisplayID_Main]->RunFilterOGL(texMain);
+				glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
+				
+				if (texFetchMainNeedsLock)
+				{
+					fetchObj.FetchTextureUnlock(NDSDisplayID_Main);
+				}
+				
+				width[NDSDisplayID_Main]  = (GLsizei)vfMain->GetDstWidth();
+				height[NDSDisplayID_Main] = (GLsizei)vfMain->GetDstHeight();
+				isDisplayProcessedMain = true;
+				texFetchMainNeedsLock = false;
+				
+				if (selectedDisplaySource[NDSDisplayID_Main] == selectedDisplaySource[NDSDisplayID_Touch])
+				{
+					isDisplayProcessedTouch = true;
+					texFetchTouchNeedsLock = false;
+				}
+			}
+			
+			if (shouldProcessDisplay[NDSDisplayID_Touch])
+			{
+				if (texFetchTouchNeedsLock)
+				{
+					fetchObj.FetchTextureReadLock(NDSDisplayID_Touch);
+				}
+				
+				glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_FALSE);
+				texTouch = this->_shaderFilter[NDSDisplayID_Touch]->RunFilterOGL(texTouch);
+				glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
+				
+				if (texFetchTouchNeedsLock)
+				{
+					fetchObj.FetchTextureUnlock(NDSDisplayID_Touch);
+				}
+				
+				width[NDSDisplayID_Touch]  = (GLsizei)vfTouch->GetDstWidth();
+				height[NDSDisplayID_Touch] = (GLsizei)vfTouch->GetDstHeight();
+				isDisplayProcessedTouch = true;
+				texFetchTouchNeedsLock = false;
+			}
+			
+			if (needsFetchBuffersLock && (!shouldProcessDisplay[NDSDisplayID_Main] || isDisplayProcessedMain) && (!shouldProcessDisplay[NDSDisplayID_Touch] || isDisplayProcessedTouch))
+			{
+				glFinish();
+				needsFetchBuffersLock = false;
+				this->_output->UnlockEmuFramebuffer(bufferIndex);
+			}
+		}
+		
+		// If the pixel scaler didn't already run on the GPU, then run the pixel scaler on the CPU.
+		if ( (this->_output->GetPixelScaler() != VideoFilterTypeID_None) && !willFilterOnGPU )
+		{
+			if (useDeposterize)
+			{
+				// Hybrid CPU/GPU-based path (may cause a performance hit on pixel download)
+				if (shouldProcessDisplay[NDSDisplayID_Main])
+				{
+					this->_filterDeposterize[NDSDisplayID_Main]->DownloadDstBufferOGL(vfMain->GetSrcBufferPtr(), 0, vfMain->GetSrcHeight());
+				}
+				
+				if (shouldProcessDisplay[NDSDisplayID_Touch])
+				{
+					this->_filterDeposterize[NDSDisplayID_Touch]->DownloadDstBufferOGL(vfTouch->GetSrcBufferPtr(), 0, vfTouch->GetSrcHeight());
+				}
+			}
+			
+			if (shouldProcessDisplay[NDSDisplayID_Main])
+			{
+				pthread_rwlock_rdlock(&this->_cpuFilterRWLock[NDSDisplayID_Main][bufferIndex]);
+				vfMain->RunFilter();
+				pthread_rwlock_unlock(&this->_cpuFilterRWLock[NDSDisplayID_Main][bufferIndex]);
+			}
+			
+			if (shouldProcessDisplay[NDSDisplayID_Touch])
+			{
+				pthread_rwlock_rdlock(&this->_cpuFilterRWLock[NDSDisplayID_Touch][bufferIndex]);
+				vfTouch->RunFilter();
+				pthread_rwlock_unlock(&this->_cpuFilterRWLock[NDSDisplayID_Touch][bufferIndex]);
+			}
+			
+			if (shouldProcessDisplay[NDSDisplayID_Main])
+			{
+				texMain = this->_output->GetTexCPUFilterDstID(NDSDisplayID_Main);
+				glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texMain);
+				glTexSubImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, vfMain->GetDstWidth(), vfMain->GetDstHeight(), GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, vfMain->GetDstBufferPtr());
+				
+				width[NDSDisplayID_Main]  = (GLsizei)vfMain->GetDstWidth();
+				height[NDSDisplayID_Main] = (GLsizei)vfMain->GetDstHeight();
+				isDisplayProcessedMain = true;
+				
+				if (selectedDisplaySource[NDSDisplayID_Main] == selectedDisplaySource[NDSDisplayID_Touch])
+				{
+					isDisplayProcessedTouch = true;
+				}
+			}
+			
+			if (shouldProcessDisplay[NDSDisplayID_Touch])
+			{
+				texTouch = this->_output->GetTexCPUFilterDstID(NDSDisplayID_Touch);
+				glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texTouch);
+				glTexSubImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, vfTouch->GetDstWidth(), vfTouch->GetDstHeight(), GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, vfTouch->GetDstBufferPtr());
+				
+				width[NDSDisplayID_Touch]  = (GLsizei)vfTouch->GetDstWidth();
+				height[NDSDisplayID_Touch] = (GLsizei)vfTouch->GetDstHeight();
+				isDisplayProcessedTouch = true;
+			}
 		}
 	}
 	
 	// Set the final output texture IDs
-	this->_texVideoOutputID[NDSDisplayID_Main] = texVideoSourceID[NDSDisplayID_Main];
+	if (selectedDisplaySource[NDSDisplayID_Touch] == selectedDisplaySource[NDSDisplayID_Main])
-	
-	if (selectedDisplaySource[NDSDisplayID_Touch] != selectedDisplaySource[NDSDisplayID_Main])
 	{
-		this->_texVideoOutputID[NDSDisplayID_Touch] = texVideoSourceID[NDSDisplayID_Touch];
+		texTouch = texMain;
-	}
-	else
-	{
-		this->_texVideoOutputID[NDSDisplayID_Touch] = texVideoSourceID[NDSDisplayID_Main];
 		width[NDSDisplayID_Touch]  = width[NDSDisplayID_Main];
 		height[NDSDisplayID_Touch] = height[NDSDisplayID_Main];
 	}
@@ -7183,11 +7411,21 @@ void OGLDisplayLayer::ProcessOGL()
 	
 	// OpenGL shader-based filters can modify the viewport, so it needs to be reset here.
 	glViewport(0, 0, this->_output->GetViewportWidth(), this->_output->GetViewportHeight());
+	
+	glFlush();
+	
+	OGLProcessedFrameInfo newFrameInfo;
+	newFrameInfo.bufferIndex = bufferIndex;
+	newFrameInfo.isMainDisplayProcessed  = isDisplayProcessedMain;
+	newFrameInfo.isTouchDisplayProcessed = isDisplayProcessedTouch;
+	newFrameInfo.texID[NDSDisplayID_Main]  = texMain;
+	newFrameInfo.texID[NDSDisplayID_Touch] = texTouch;
+	
+	this->_output->SetProcessedFrameInfo(newFrameInfo);
 }
 
 void OGLDisplayLayer::RenderOGL(bool isRenderingFlipped)
 {
-	const NDSDisplayInfo &emuDisplayInfo = this->_output->GetEmuDisplayInfo();
 	const bool isShaderSupported = this->_output->GetContextInfo()->IsShaderSupported();
 	
 	if (isShaderSupported)
@@ -7227,14 +7465,25 @@ void OGLDisplayLayer::RenderOGL(bool isRenderingFlipped)
 		this->_UpdateRotationScaleOGL();
 	}
 	
-	if (emuDisplayInfo.pixelBytes != 0)
-	{
 	if (this->_needUpdateVertices)
 	{
 		this->_UpdateVerticesOGL();
 	}
 	
-		this->_output->LockDisplayTextures();
+	OGLClientFetchObject &fetchObj = (OGLClientFetchObject &)this->_output->GetFetchObject();
+	const NDSDisplayInfo &emuDisplayInfo = this->_output->GetEmuDisplayInfo();
+	const float backlightIntensity[2] = { emuDisplayInfo.backlightIntensity[NDSDisplayID_Main], emuDisplayInfo.backlightIntensity[NDSDisplayID_Touch] };
+	
+	const OGLProcessedFrameInfo processedInfo = this->_output->GetProcessedFrameInfo();
+	bool texFetchMainNeedsLock  = !processedInfo.isMainDisplayProcessed;
+	bool texFetchTouchNeedsLock = !processedInfo.isTouchDisplayProcessed;
+	const bool needsFetchBuffersLock = texFetchMainNeedsLock || texFetchTouchNeedsLock;
+	
+	if (needsFetchBuffersLock)
+	{
+		this->_output->ReadLockEmuFramebuffer(processedInfo.bufferIndex);
+	}
+	
 	glBindVertexArrayDESMUME(this->_vaoMainStatesID);
 	
 	switch (this->_output->GetPresenterProperties().mode)
@@ -7245,13 +7494,25 @@ void OGLDisplayLayer::RenderOGL(bool isRenderingFlipped)
 			{
 				if (isShaderSupported)
 				{
-						glUniform1f(this->_uniformBacklightIntensity, emuDisplayInfo.backlightIntensity[NDSDisplayID_Main]);
+					glUniform1f(this->_uniformBacklightIntensity, backlightIntensity[NDSDisplayID_Main]);
 				}
 				
-					glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texVideoOutputID[NDSDisplayID_Main]);
+				if (texFetchMainNeedsLock)
+				{
+					fetchObj.FetchTextureWriteLock(NDSDisplayID_Main);
+				}
+				
+				glBindTexture(GL_TEXTURE_RECTANGLE_ARB, processedInfo.texID[NDSDisplayID_Main]);
 				glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, this->_displayTexFilter[NDSDisplayID_Main]);
 				glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, this->_displayTexFilter[NDSDisplayID_Main]);
 				glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+				
+				if (texFetchMainNeedsLock)
+				{
+					glFlush();
+					fetchObj.FetchTextureUnlock(NDSDisplayID_Main);
+					texFetchMainNeedsLock = false;
+				}
 			}
 			break;
 		}
@@ -7262,13 +7523,25 @@ void OGLDisplayLayer::RenderOGL(bool isRenderingFlipped)
 			{
 				if (isShaderSupported)
 				{
-						glUniform1f(this->_uniformBacklightIntensity, emuDisplayInfo.backlightIntensity[NDSDisplayID_Touch]);
+					glUniform1f(this->_uniformBacklightIntensity, backlightIntensity[NDSDisplayID_Touch]);
 				}
 				
-					glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texVideoOutputID[NDSDisplayID_Touch]);
+				if (texFetchTouchNeedsLock)
+				{
+					fetchObj.FetchTextureWriteLock(NDSDisplayID_Touch);
+				}
+				
+				glBindTexture(GL_TEXTURE_RECTANGLE_ARB, processedInfo.texID[NDSDisplayID_Touch]);
 				glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, this->_displayTexFilter[NDSDisplayID_Touch]);
 				glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, this->_displayTexFilter[NDSDisplayID_Touch]);
 				glDrawArrays(GL_TRIANGLE_STRIP, 4, 4);
+				
+				if (texFetchTouchNeedsLock)
+				{
+					glFlush();
+					fetchObj.FetchTextureUnlock(NDSDisplayID_Touch);
+					texFetchTouchNeedsLock = false;
+				}
 			}
 			break;
 		}
@@ -7278,6 +7551,9 @@ void OGLDisplayLayer::RenderOGL(bool isRenderingFlipped)
 			const NDSDisplayID majorDisplayID = (this->_output->GetPresenterProperties().order == ClientDisplayOrder_MainFirst) ? NDSDisplayID_Main : NDSDisplayID_Touch;
 			const size_t majorDisplayVtx = (this->_output->GetPresenterProperties().order == ClientDisplayOrder_MainFirst) ? 8 : 12;
 			
+			bool texFetchMainAlreadyLocked = false;
+			bool texFetchTouchAlreadyLocked = false;
+			
 			switch (this->_output->GetPresenterProperties().layout)
 			{
 				case ClientDisplayLayout_Hybrid_2_1:
@@ -7288,13 +7564,32 @@ void OGLDisplayLayer::RenderOGL(bool isRenderingFlipped)
 					{
 						if (isShaderSupported)
 						{
-								glUniform1f(this->_uniformBacklightIntensity, emuDisplayInfo.backlightIntensity[majorDisplayID]);
+							glUniform1f(this->_uniformBacklightIntensity, backlightIntensity[majorDisplayID]);
 						}
 						
-							glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texVideoOutputID[majorDisplayID]);
+						const bool texFetchMajorNeedsLock = (majorDisplayID == NDSDisplayID_Main) ? texFetchMainNeedsLock : texFetchTouchNeedsLock;
+						
+						if (texFetchMajorNeedsLock)
+						{
+							fetchObj.FetchTextureWriteLock(majorDisplayID);
+						}
+						
+						glBindTexture(GL_TEXTURE_RECTANGLE_ARB, processedInfo.texID[majorDisplayID]);
 						glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, this->_displayTexFilter[majorDisplayID]);
 						glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, this->_displayTexFilter[majorDisplayID]);
 						glDrawArrays(GL_TRIANGLE_STRIP, majorDisplayVtx, 4);
+						
+						if (texFetchMajorNeedsLock)
+						{
+							if (majorDisplayID == NDSDisplayID_Main)
+							{
+								texFetchMainAlreadyLocked = true;
+							}
+							else
+							{
+								texFetchTouchAlreadyLocked = true;
+							}
+						}
 					}
 					break;
 				}
@@ -7307,26 +7602,50 @@ void OGLDisplayLayer::RenderOGL(bool isRenderingFlipped)
 			{
 				if (isShaderSupported)
 				{
-						glUniform1f(this->_uniformBacklightIntensity, emuDisplayInfo.backlightIntensity[NDSDisplayID_Main]);
+					glUniform1f(this->_uniformBacklightIntensity, backlightIntensity[NDSDisplayID_Main]);
 				}
 				
-					glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texVideoOutputID[NDSDisplayID_Main]);
+				if (texFetchMainNeedsLock && !texFetchMainAlreadyLocked)
+				{
+					fetchObj.FetchTextureWriteLock(NDSDisplayID_Main);
+				}
+				
+				glBindTexture(GL_TEXTURE_RECTANGLE_ARB, processedInfo.texID[NDSDisplayID_Main]);
 				glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, this->_displayTexFilter[NDSDisplayID_Main]);
 				glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, this->_displayTexFilter[NDSDisplayID_Main]);
 				glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+				
+				if (texFetchMainNeedsLock)
+				{
+					glFlush();
+					fetchObj.FetchTextureUnlock(NDSDisplayID_Main);
+					texFetchMainNeedsLock = false;
+				}
 			}
 			
 			if (this->_output->IsSelectedDisplayEnabled(NDSDisplayID_Touch))
 			{
 				if (isShaderSupported)
 				{
-						glUniform1f(this->_uniformBacklightIntensity, emuDisplayInfo.backlightIntensity[NDSDisplayID_Touch]);
+					glUniform1f(this->_uniformBacklightIntensity, backlightIntensity[NDSDisplayID_Touch]);
 				}
 				
-					glBindTexture(GL_TEXTURE_RECTANGLE_ARB, this->_texVideoOutputID[NDSDisplayID_Touch]);
+				if (texFetchTouchNeedsLock && !texFetchTouchAlreadyLocked)
+				{
+					fetchObj.FetchTextureWriteLock(NDSDisplayID_Touch);
+				}
+				
+				glBindTexture(GL_TEXTURE_RECTANGLE_ARB, processedInfo.texID[NDSDisplayID_Touch]);
 				glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, this->_displayTexFilter[NDSDisplayID_Touch]);
 				glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, this->_displayTexFilter[NDSDisplayID_Touch]);
 				glDrawArrays(GL_TRIANGLE_STRIP, 4, 4);
+				
+				if (texFetchTouchNeedsLock)
+				{
+					glFlush();
+					fetchObj.FetchTextureUnlock(NDSDisplayID_Touch);
+					texFetchTouchNeedsLock = false;
+				}
 			}
 		}
 			
@@ -7335,16 +7654,9 @@ void OGLDisplayLayer::RenderOGL(bool isRenderingFlipped)
 	}
 	
 	glBindVertexArrayDESMUME(0);
-		this->_output->UnlockDisplayTextures();
-	}
-}
 	
-void OGLDisplayLayer::FinishOGL(const u8 bufferIndex)
+	if (needsFetchBuffersLock)
 	{
-	const OGLClientFetchObject &fetchObj = (const OGLClientFetchObject &)this->_output->GetFetchObject();
+		this->_output->UnlockEmuFramebuffer(processedInfo.bufferIndex);
-	
+	}
-	glFinishObjectAPPLE(GL_TEXTURE_RECTANGLE_ARB, fetchObj.GetTexNative(NDSDisplayID_Main,  bufferIndex));
-	glFinishObjectAPPLE(GL_TEXTURE_RECTANGLE_ARB, fetchObj.GetTexNative(NDSDisplayID_Touch, bufferIndex));
-	glFinishObjectAPPLE(GL_TEXTURE_RECTANGLE_ARB, fetchObj.GetTexCustom(NDSDisplayID_Main,  bufferIndex));
-	glFinishObjectAPPLE(GL_TEXTURE_RECTANGLE_ARB, fetchObj.GetTexCustom(NDSDisplayID_Touch, bufferIndex));
 }

desmume/src/frontend/cocoa/OGLDisplayOutput.h

@@ -49,6 +49,15 @@ enum ShaderSupportTier
 	ShaderSupport_FutureTier	= 6,
 };
 
+struct OGLProcessedFrameInfo
+{
+	uint8_t bufferIndex;
+	GLuint texID[2];
+	bool isMainDisplayProcessed;
+	bool isTouchDisplayProcessed;
+};
+typedef struct OGLProcessedFrameInfo OGLProcessedFrameInfo;
+
 class OGLContextInfo
 {
 protected:
@@ -273,7 +282,6 @@ public:
 	virtual void SetVisibility(const bool visibleState);
 	
 	virtual void RenderOGL(bool isRenderingFlipped) = 0;
-	virtual void FinishOGL(const u8 bufferIndex) {};
 };
 
 class OGLHUDLayer : public OGLVideoLayer
@@ -306,8 +314,7 @@ protected:
 	OGLFilter *_filterDeposterize[2];
 	OGLFilter *_shaderFilter[2];
 	GLint _displayTexFilter[2];
-	
+	pthread_rwlock_t _cpuFilterRWLock[2][2];
-	GLuint _texVideoOutputID[2];
 	
 	GLuint _vaoMainStatesID;
 	GLuint _vboVertexID;
@@ -316,8 +323,6 @@ protected:
 	void _UpdateRotationScaleOGL();
 	void _UpdateVerticesOGL();
 	
-	void _ProcessDisplayByID(const NDSDisplayID displayID, GLsizei &inoutWidth, GLsizei &inoutHeight, GLuint &inoutTexID);
-	
 public:
 	OGLDisplayLayer() {};
 	OGLDisplayLayer(OGLVideoOutput *oglVO);
@@ -328,8 +333,8 @@ public:
 	
 	void LoadNativeDisplayByID_OGL(const NDSDisplayID displayID);
 	void ProcessOGL();
+	
 	virtual void RenderOGL(bool isRenderingFlipped);
-	virtual void FinishOGL(const u8 bufferIndex);
 };
 
 class OGLClientFetchObject : public GPUClientFetchObject
@@ -345,10 +350,13 @@ protected:
 	GLuint _texHQ3xLUT;
 	GLuint _texHQ4xLUT;
 	
+	GLuint _texFetch[2];
+	
 	bool _useDirectToCPUFilterPipeline;
 	uint32_t *_srcNativeCloneMaster;
 	uint32_t *_srcNativeClone[2][2];
 	pthread_rwlock_t _srcCloneRWLock[2][2];
+	pthread_rwlock_t _texFetchRWLock[2];
 	bool _srcCloneNeedsUpdate[2][2];
 	
 	virtual void _FetchNativeDisplayByID(const NDSDisplayID displayID, const u8 bufferIndex);
@@ -372,9 +380,16 @@ public:
 	
 	void CopyFromSrcClone(uint32_t *dstBufferPtr, const NDSDisplayID displayID, const u8 bufferIndex);
 	void FetchNativeDisplayToSrcClone(const NDSDisplayID displayID, const u8 bufferIndex, bool needsLock);
+	void FetchTextureWriteLock(const NDSDisplayID displayID);
+	void FetchTextureReadLock(const NDSDisplayID displayID);
+	void FetchTextureUnlock(const NDSDisplayID displayID);
 	
 	virtual void Init();
 	virtual void SetFetchBuffers(const NDSDisplayInfo &currentDisplayInfo);
+	virtual void FetchFromBufferIndex(const u8 index);
+	
+	virtual GLuint GetFetchTexture(const NDSDisplayID displayID);
+	virtual void SetFetchTexture(const NDSDisplayID displayID, GLuint texID);
 };
 
 class OGLVideoOutput : public ClientDisplay3DPresenter
@@ -389,6 +404,8 @@ protected:
 	GLuint _texCPUFilterDstID[2];
 	GLuint _fboFrameCopyID;
 	
+	OGLProcessedFrameInfo _processedFrameInfo;
+	
 	std::vector<OGLVideoLayer *> *_layerList;
 	
 	void _UpdateViewport();
@@ -428,11 +445,15 @@ public:
 	
 	// Client view interface
 	virtual void ProcessDisplays();
-	virtual void FinishFrameAtIndex(const uint8_t bufferIndex);
+	virtual void CopyFrameToBuffer(uint32_t *dstBuffer);
-	virtual void CopyFrameToBuffer(uint32_t *dstBuffer);;
 	virtual void RenderFrameOGL(bool isRenderingFlipped);
-	virtual void LockDisplayTextures();
+	
-	virtual void UnlockDisplayTextures();
+	virtual const OGLProcessedFrameInfo& GetProcessedFrameInfo();
+	virtual void SetProcessedFrameInfo(const OGLProcessedFrameInfo &processedInfo);
+	
+	virtual void WriteLockEmuFramebuffer(const uint8_t bufferIndex);
+	virtual void ReadLockEmuFramebuffer(const uint8_t bufferIndex);
+	virtual void UnlockEmuFramebuffer(const uint8_t bufferIndex);
 };
 
 extern void (*glBindVertexArrayDESMUME)(GLuint id);

desmume/src/frontend/cocoa/cocoa_GPU.h

@@ -67,7 +67,6 @@ typedef std::map<CGDirectDisplayID, int64_t> DisplayLinkFlushTimeLimitMap;
 - (void) incrementViewsUsingDirectToCPUFiltering;
 - (void) decrementViewsUsingDirectToCPUFiltering;
 - (void) pushVideoDataToAllDisplayViews;
-- (void) finishAllDisplayViewsAtIndex:(const u8)bufferIndex;
 - (void) flushAllDisplaysOnDisplayLink:(CVDisplayLinkRef)displayLink timeStamp:(const CVTimeStamp *)timeStamp;
 
 - (void) displayLinkStartUsingID:(CGDirectDisplayID)displayID;

desmume/src/frontend/cocoa/cocoa_GPU.mm

@@ -166,6 +166,10 @@ public:
 	
 #ifdef ENABLE_APPLE_METAL
 	if (IsOSXVersionSupported(10, 11, 0) && ![[NSUserDefaults standardUserDefaults] boolForKey:@"Debug_DisableMetal"])
+	{
+		// macOS v10.13.0 and v10.13.1 are specifically checked for here, because there are
+		// bugs in these versions of macOS that prevent Metal from working properly.
+		if (!IsOSXVersion(10, 13, 0) && !IsOSXVersion(10, 13, 1))
 		{
 			fetchObject = new MacMetalFetchObject;
 			
@@ -179,6 +183,7 @@ public:
 				GPU->SetWillPostprocessDisplays(false);
 			}
 		}
+	}
 #endif
 	
 	if (fetchObject == NULL)
@@ -189,6 +194,8 @@ public:
 	fetchObject->Init();
 	gpuEvent->SetFetchObject(fetchObject);
 	
+	[self clearWithColor:0x8000];
+	
 	return self;
 }
 
@@ -244,15 +251,16 @@ public:
 
 - (void) setGpuDimensions:(NSSize)theDimensions
 {
-	[[self sharedData] finishAllDisplayViewsAtIndex:0];
-	[[self sharedData] finishAllDisplayViewsAtIndex:1];
-	
 	gpuEvent->Render3DLock();
 	gpuEvent->FramebufferLockWrite();
+	pthread_rwlock_wrlock([[self sharedData] rwlockFramebufferAtIndex:0]);
+	pthread_rwlock_wrlock([[self sharedData] rwlockFramebufferAtIndex:1]);
 	
 	GPU->SetCustomFramebufferSize(theDimensions.width, theDimensions.height);
 	fetchObject->SetFetchBuffers(GPU->GetDisplayInfo());
 	
+	pthread_rwlock_unlock([[self sharedData] rwlockFramebufferAtIndex:1]);
+	pthread_rwlock_unlock([[self sharedData] rwlockFramebufferAtIndex:0]);
 	gpuEvent->FramebufferUnlock();
 	gpuEvent->Render3DUnlock();
 }
@@ -294,15 +302,16 @@ public:
 	}
 	
 	// Change the color format.
-	[[self sharedData] finishAllDisplayViewsAtIndex:0];
-	[[self sharedData] finishAllDisplayViewsAtIndex:1];
-	
 	gpuEvent->Render3DLock();
 	gpuEvent->FramebufferLockWrite();
+	pthread_rwlock_wrlock([[self sharedData] rwlockFramebufferAtIndex:0]);
+	pthread_rwlock_wrlock([[self sharedData] rwlockFramebufferAtIndex:1]);
 	
 	GPU->SetColorFormat((NDSColorFormat)colorFormat);
 	fetchObject->SetFetchBuffers(GPU->GetDisplayInfo());
 	
+	pthread_rwlock_unlock([[self sharedData] rwlockFramebufferAtIndex:1]);
+	pthread_rwlock_unlock([[self sharedData] rwlockFramebufferAtIndex:0]);
 	gpuEvent->FramebufferUnlock();
 	gpuEvent->Render3DUnlock();
 }
@@ -842,8 +851,17 @@ public:
 - (void) clearWithColor:(const uint16_t)colorBGRA5551
 {
 	gpuEvent->FramebufferLockWrite();
+	const u8 bufferIndex = GPU->GetDisplayInfo().bufferIndex;
+	pthread_rwlock_wrlock([[self sharedData] rwlockFramebufferAtIndex:bufferIndex]);
+	
 	GPU->ClearWithColor(colorBGRA5551);
+	
+	pthread_rwlock_unlock([[self sharedData] rwlockFramebufferAtIndex:bufferIndex]);
 	gpuEvent->FramebufferUnlock();
+	
+#if !defined(PORT_VERSION_OPENEMU)
+	[[self sharedData] signalFetchAtIndex:bufferIndex];
+#endif
 }
 
 - (void) respondToPauseState:(BOOL)isPaused
@@ -1022,30 +1040,6 @@ public:
 	}
 }
 
-- (void) finishAllDisplayViewsAtIndex:(const u8)bufferIndex
-{
-	pthread_mutex_t *currentMutex = _mutexOutputList;
-	
-	if (currentMutex != NULL)
-	{
-		pthread_mutex_lock(currentMutex);
-	}
-	
-	for (CocoaDSOutput *cdsOutput in _cdsOutputList)
-	{
-		if ([cdsOutput isKindOfClass:[CocoaDSDisplayVideo class]])
-		{
-			ClientDisplay3DView *cdv = [(CocoaDSDisplayVideo *)cdsOutput clientDisplay3DView];
-			cdv->Get3DPresenter()->FinishFrameAtIndex(bufferIndex);
-		}
-	}
-	
-	if (currentMutex != NULL)
-	{
-		pthread_mutex_unlock(currentMutex);
-	}
-}
-
 - (void) flushAllDisplaysOnDisplayLink:(CVDisplayLinkRef)displayLink timeStamp:(const CVTimeStamp *)timeStamp
 {
 	pthread_mutex_t *currentMutex = _mutexOutputList;
@@ -1189,11 +1183,11 @@ public:
 }
 
 - (void) runFetchLoop
-{
-	do
 {
 	pthread_mutex_lock(&_mutexFetchExecute);
 	
+	do
+	{
 		while (!_isFetchSignalled)
 		{
 			pthread_cond_wait(&_condSignalFetch, &_mutexFetchExecute);
@@ -1202,8 +1196,6 @@ public:
 		
 		GPUFetchObject->FetchFromBufferIndex(_fetchIndex);
 		[self pushVideoDataToAllDisplayViews];
-		
-		pthread_mutex_unlock(&_mutexFetchExecute);
 	} while(true);
 }
 

desmume/src/frontend/cocoa/cocoa_output.mm

@@ -1137,10 +1137,6 @@
 
 - (void) handleReloadReprocessRedraw
 {
-	GPUClientFetchObject &fetchObjMutable = (GPUClientFetchObject &)_cdv->Get3DPresenter()->GetFetchObject();
-	const u8 bufferIndex = fetchObjMutable.GetLastFetchIndex();
-	
-	fetchObjMutable.FetchFromBufferIndex(bufferIndex);
 	_cdv->Get3DPresenter()->LoadDisplays();
 	_cdv->Get3DPresenter()->ProcessDisplays();
 	

desmume/src/frontend/cocoa/userinterface/DisplayViewCALayer.h

@@ -92,7 +92,6 @@ private:
 	void __InstanceInit();
 	
 protected:
-	NSView *_nsView;
 	CALayer<DisplayViewCALayer> *_caLayer;
 	bool _willRenderToCALayer;
 	
@@ -100,9 +99,6 @@ public:
 	MacDisplayLayeredView();
 	MacDisplayLayeredView(ClientDisplay3DPresenter *thePresenter);
 	
-	NSView* GetNSView() const;
-	void SetNSView(NSView *theView);
-	
 	CALayer<DisplayViewCALayer>* GetCALayer() const;
 	
 	bool GetRenderToCALayer() const;

desmume/src/frontend/cocoa/userinterface/DisplayViewCALayer.mm

@@ -52,21 +52,10 @@ MacDisplayLayeredView::MacDisplayLayeredView(ClientDisplay3DPresenter *thePresen
 
 void MacDisplayLayeredView::__InstanceInit()
 {
-	_nsView = nil;
 	_caLayer = nil;
 	_willRenderToCALayer = false;
 }
 
-NSView* MacDisplayLayeredView::GetNSView() const
-{
-	return this->_nsView;
-}
-
-void MacDisplayLayeredView::SetNSView(NSView *theView)
-{
-	this->_nsView = theView;
-}
-
 CALayer<DisplayViewCALayer>* MacDisplayLayeredView::GetCALayer() const
 {
 	return this->_caLayer;

desmume/src/frontend/cocoa/userinterface/DisplayWindowController.mm

@@ -2055,7 +2055,6 @@ static std::unordered_map<NSScreen *, DisplayWindowController *> _screenMap; //
 		if ([(MetalDisplayViewSharedData *)macSharedData device] != nil)
 		{
 			MacMetalDisplayView *macMTLCDV = new MacMetalDisplayView(macSharedData);
-			macMTLCDV->SetNSView(self);
 			macMTLCDV->Init();
 			
 			localLayer = macMTLCDV->GetCALayer();
@@ -2066,7 +2065,6 @@ static std::unordered_map<NSScreen *, DisplayWindowController *> _screenMap; //
 #endif
 	{
 		MacOGLDisplayView *macOGLCDV = new MacOGLDisplayView(macSharedData);
-		macOGLCDV->SetNSView(self);
 		macOGLCDV->Init();
 		
 		localLayer = macOGLCDV->GetCALayer();

desmume/src/frontend/cocoa/userinterface/MacMetalDisplayView.h

@@ -34,6 +34,15 @@ class MacMetalFetchObject;
 class MacMetalDisplayPresenter;
 class MacMetalDisplayView;
 
+struct MetalProcessedFrameInfo
+{
+	uint8_t bufferIndex;
+	id<MTLTexture> tex[2];
+	bool isMainDisplayProcessed;
+	bool isTouchDisplayProcessed;
+};
+typedef struct MetalProcessedFrameInfo MetalProcessedFrameInfo;
+
 struct DisplayViewShaderProperties
 {
 	float width;
@@ -70,22 +79,22 @@ typedef DisplayViewShaderProperties DisplayViewShaderProperties;
 	id<MTLBuffer> _bufMasterBrightMode[2];
 	id<MTLBuffer> _bufMasterBrightIntensity[2];
 	
-	id<MTLTexture> texDisplayFetch16NativeMain;
+	id<MTLTexture> _texDisplayFetch16NativeMain;
-	id<MTLTexture> texDisplayFetch16NativeTouch;
+	id<MTLTexture> _texDisplayFetch16NativeTouch;
-	id<MTLTexture> texDisplayFetch32NativeMain;
+	id<MTLTexture> _texDisplayFetch32NativeMain;
-	id<MTLTexture> texDisplayFetch32NativeTouch;
+	id<MTLTexture> _texDisplayFetch32NativeTouch;
-	id<MTLTexture> texDisplayFetch16CustomMain;
+	id<MTLTexture> _texDisplayPostprocessNativeMain;
-	id<MTLTexture> texDisplayFetch16CustomTouch;
+	id<MTLTexture> _texDisplayPostprocessNativeTouch;
-	id<MTLTexture> texDisplayFetch32CustomMain;
-	id<MTLTexture> texDisplayFetch32CustomTouch;
 	
-	id<MTLTexture> texDisplayPostprocessNativeMain;
+	id<MTLTexture> _texDisplayFetch16CustomMain;
-	id<MTLTexture> texDisplayPostprocessCustomMain;
+	id<MTLTexture> _texDisplayFetch16CustomTouch;
-	id<MTLTexture> texDisplayPostprocessNativeTouch;
+	id<MTLTexture> _texDisplayFetch32CustomMain;
-	id<MTLTexture> texDisplayPostprocessCustomTouch;
+	id<MTLTexture> _texDisplayFetch32CustomTouch;
+	id<MTLTexture> _texDisplayPostprocessCustomMain;
+	id<MTLTexture> _texDisplayPostprocessCustomTouch;
 	
-	id<MTLTexture> texDisplaySrcTargetMain;
+	id<MTLTexture> texFetchMain;
-	id<MTLTexture> texDisplaySrcTargetTouch;
+	id<MTLTexture> texFetchTouch;
 	
 	id<MTLTexture> texLQ2xLUT;
 	id<MTLTexture> texHQ2xLUT;
@@ -93,16 +102,13 @@ typedef DisplayViewShaderProperties DisplayViewShaderProperties;
 	id<MTLTexture> texHQ4xLUT;
 	id<MTLTexture> texCurrentHQnxLUT;
 	
-	MTLSize fetchThreadsPerGroup;
+	MTLSize _fetchThreadsPerGroup;
-	MTLSize fetchThreadGroupsPerGridNative;
+	MTLSize _fetchThreadGroupsPerGridNative;
-	MTLSize fetchThreadGroupsPerGridCustom;
+	MTLSize _fetchThreadGroupsPerGridCustom;
 	MTLSize deposterizeThreadsPerGroup;
 	MTLSize deposterizeThreadGroupsPerGrid;
 	
-	size_t displayFetchNativeBufferSize;
+	uint32_t _isUsingFramebufferDirectly[2][2];
-	size_t displayFetchCustomBufferSize;
-	
-	pthread_mutex_t _mutexFetch;
 }
 
 @property (readonly, nonatomic) id<MTLDevice> device;
@@ -117,22 +123,8 @@ typedef DisplayViewShaderProperties DisplayViewShaderProperties;
 
 @property (readonly, nonatomic) id<MTLBuffer> hudIndexBuffer;
 
-@property (readonly, nonatomic) id<MTLTexture> texDisplayFetch16NativeMain;
+@property (retain) id<MTLTexture> texFetchMain;
-@property (readonly, nonatomic) id<MTLTexture> texDisplayFetch16NativeTouch;
+@property (retain) id<MTLTexture> texFetchTouch;
-@property (readonly, nonatomic) id<MTLTexture> texDisplayFetch32NativeMain;
-@property (readonly, nonatomic) id<MTLTexture> texDisplayFetch32NativeTouch;
-@property (retain) id<MTLTexture> texDisplayFetch16CustomMain;
-@property (retain) id<MTLTexture> texDisplayFetch16CustomTouch;
-@property (retain) id<MTLTexture> texDisplayFetch32CustomMain;
-@property (retain) id<MTLTexture> texDisplayFetch32CustomTouch;
-
-@property (retain) id<MTLTexture> texDisplayPostprocessNativeMain;
-@property (retain) id<MTLTexture> texDisplayPostprocessCustomMain;
-@property (retain) id<MTLTexture> texDisplayPostprocessNativeTouch;
-@property (retain) id<MTLTexture> texDisplayPostprocessCustomTouch;
-
-@property (retain) id<MTLTexture> texDisplaySrcTargetMain;
-@property (retain) id<MTLTexture> texDisplaySrcTargetTouch;
 
 @property (readonly, nonatomic) id<MTLTexture> texLQ2xLUT;
 @property (readonly, nonatomic) id<MTLTexture> texHQ2xLUT;
@@ -140,16 +132,14 @@ typedef DisplayViewShaderProperties DisplayViewShaderProperties;
 @property (readonly, nonatomic) id<MTLTexture> texHQ4xLUT;
 @property (retain) id<MTLTexture> texCurrentHQnxLUT;
 
-@property (assign) size_t displayFetchNativeBufferSize;
-@property (assign) size_t displayFetchCustomBufferSize;
-
-@property (readonly, nonatomic) MTLSize fetchThreadsPerGroup;
-@property (readonly, nonatomic) MTLSize fetchThreadGroupsPerGridNative;
-@property (assign) MTLSize fetchThreadGroupsPerGridCustom;
 @property (readonly, nonatomic) MTLSize deposterizeThreadsPerGroup;
 @property (readonly, nonatomic) MTLSize deposterizeThreadGroupsPerGrid;
 
+- (void) setUsingFramebufferDirectlyAtIndex:(const u8)index displayID:(NDSDisplayID)displayID state:(bool)theState;
+- (bool) isUsingFramebufferDirectlyAtIndex:(const u8)index displayID:(NDSDisplayID)displayID;
+
 - (void) setFetchBuffersWithDisplayInfo:(const NDSDisplayInfo &)dispInfo;
+- (void) setFetchTextureBindingsAtIndex:(const u8)index commandBuffer:(id<MTLCommandBuffer>)cb;
 - (void) fetchFromBufferIndex:(const u8)index;
 - (void) fetchNativeDisplayByID:(const NDSDisplayID)displayID bufferIndex:(const u8)bufferIndex;
 - (void) fetchCustomDisplayByID:(const NDSDisplayID)displayID bufferIndex:(const u8)bufferIndex;
@@ -174,15 +164,14 @@ typedef DisplayViewShaderProperties DisplayViewShaderProperties;
 	id<MTLBuffer> _hudVtxPositionBuffer;
 	id<MTLBuffer> _hudVtxColorBuffer;
 	id<MTLBuffer> _hudTexCoordBuffer;
-	id<MTLBuffer> bufCPUFilterSrcMain;
+	id<MTLBuffer> _bufCPUFilterSrcMain;
-	id<MTLBuffer> bufCPUFilterSrcTouch;
+	id<MTLBuffer> _bufCPUFilterSrcTouch;
 	id<MTLBuffer> bufCPUFilterDstMain;
 	id<MTLBuffer> bufCPUFilterDstTouch;
 	
 	id<MTLTexture> _texDisplaySrcDeposterize[2][2];
 	id<MTLTexture> texDisplayPixelScaleMain;
 	id<MTLTexture> texDisplayPixelScaleTouch;
-	id<MTLTexture> _texDisplayOutput[2];
 	id<MTLTexture> texHUDCharMap;
 	
 	MTLSize _pixelScalerThreadsPerGroup;
@@ -193,28 +182,25 @@ typedef DisplayViewShaderProperties DisplayViewShaderProperties;
 	BOOL needsScreenVerticesUpdate;
 	BOOL needsHUDVerticesUpdate;
 	
-	pthread_mutex_t _mutexDisplayTextureUpdate;
 	pthread_mutex_t _mutexBufferUpdate;
 	bool _needEncodeViewport;
 	MTLViewport _newViewport;
-	bool _willDrawDisplays;
 	bool _willDrawHUD;
 	bool _willDrawHUDInput;
 	size_t _hudStringLength;
 	size_t _hudTouchLineLength;
+		
+	MetalProcessedFrameInfo processedFrameInfo;
 }
 
 @property (readonly, nonatomic) ClientDisplay3DPresenter *cdp;
 @property (assign, nonatomic) MetalDisplayViewSharedData *sharedData;
 @property (readonly, nonatomic) MTLRenderPassColorAttachmentDescriptor *colorAttachment0Desc;
-@property (readonly, nonatomic) pthread_mutex_t *mutexDisplayTextureUpdate;
 @property (readonly, nonatomic) pthread_mutex_t *mutexBufferUpdate;
 @property (retain) id<MTLComputePipelineState> pixelScalePipeline;
 @property (retain) id<MTLRenderPipelineState> outputRGBAPipeline;
 @property (retain) id<MTLRenderPipelineState> outputDrawablePipeline;
 @property (assign) MTLPixelFormat drawableFormat;
-@property (retain) id<MTLBuffer> bufCPUFilterSrcMain;
-@property (retain) id<MTLBuffer> bufCPUFilterSrcTouch;
 @property (retain) id<MTLBuffer> bufCPUFilterDstMain;
 @property (retain) id<MTLBuffer> bufCPUFilterDstTouch;
 @property (retain) id<MTLTexture> texDisplayPixelScaleMain;
@@ -226,6 +212,7 @@ typedef DisplayViewShaderProperties DisplayViewShaderProperties;
 @property (assign) BOOL needsHUDVerticesUpdate;
 @property (assign, nonatomic) VideoFilterTypeID pixelScaler;
 @property (assign, nonatomic) OutputFilterTypeID outputFilter;
+@property (assign) MetalProcessedFrameInfo processedFrameInfo;
 
 - (id) initWithDisplayPresenter:(MacMetalDisplayPresenter *)thePresenter;
 - (id<MTLCommandBuffer>) newCommandBuffer;
@@ -236,7 +223,9 @@ typedef DisplayViewShaderProperties DisplayViewShaderProperties;
 - (void) updateRenderBuffers;
 - (void) renderForCommandBuffer:(id<MTLCommandBuffer>)cb
 			outputPipelineState:(id<MTLRenderPipelineState>)outputPipelineState
-			   hudPipelineState:(id<MTLRenderPipelineState>)hudPipelineState;
+			   hudPipelineState:(id<MTLRenderPipelineState>)hudPipelineState
+				 texDisplayMain:(id<MTLTexture>)texDisplayMain
+				texDisplayTouch:(id<MTLTexture>)texDisplayTouch;
 - (void) renderToBuffer:(uint32_t *)dstBuffer;
 
 @end
@@ -288,6 +277,7 @@ private:
 protected:
 	MacMetalDisplayPresenterObject *_presenterObject;
 	pthread_mutex_t _mutexProcessPtr;
+	pthread_rwlock_t _cpuFilterRWLock[2][2];
 	
 	virtual void _UpdateNormalSize();
 	virtual void _UpdateOrder();
@@ -304,6 +294,7 @@ public:
 	
 	MacMetalDisplayPresenterObject* GetPresenterObject() const;
 	pthread_mutex_t* GetMutexProcessPtr();
+	pthread_rwlock_t* GetCPUFilterRWLock(const NDSDisplayID displayID, const uint8_t bufferIndex);
 	
 	virtual void Init();
 	virtual void SetSharedData(MacClientSharedObject *sharedObject);

desmume/src/frontend/cocoa/userinterface/MacOGLDisplayView.h

@@ -50,6 +50,8 @@ protected:
 	NSOpenGLContext *_nsContext;
 	CGLContextObj _context;
 	
+	OSSpinLock _spinlockTexFetch[2];
+	
 public:
 	void operator delete(void *ptr);
 	MacOGLClientFetchObject();
@@ -60,6 +62,9 @@ public:
 	virtual void Init();
 	virtual void SetFetchBuffers(const NDSDisplayInfo &currentDisplayInfo);
 	virtual void FetchFromBufferIndex(const u8 index);
+	
+	virtual GLuint GetFetchTexture(const NDSDisplayID displayID);
+	virtual void SetFetchTexture(const NDSDisplayID displayID, GLuint texID);
 };
 
 class MacOGLDisplayPresenter : public OGLVideoOutput, public MacDisplayPresenterInterface
@@ -72,6 +77,7 @@ protected:
 	NSOpenGLPixelFormat *_nsPixelFormat;
 	CGLContextObj _context;
 	CGLPixelFormatObj _pixelFormat;
+	OSSpinLock _spinlockProcessedInfo;
 	
 public:
 	void operator delete(void *ptr);
@@ -97,9 +103,13 @@ public:
 	virtual void LoadDisplays();
 	virtual void ProcessDisplays();
 	virtual void CopyFrameToBuffer(uint32_t *dstBuffer);
-	virtual void FinishFrameAtIndex(const uint8_t bufferIndex);
+	
-	virtual void LockDisplayTextures();
+	virtual const OGLProcessedFrameInfo& GetProcessedFrameInfo();
-	virtual void UnlockDisplayTextures();
+	virtual void SetProcessedFrameInfo(const OGLProcessedFrameInfo &processedInfo);
+	
+	virtual void WriteLockEmuFramebuffer(const uint8_t bufferIndex);
+	virtual void ReadLockEmuFramebuffer(const uint8_t bufferIndex);
+	virtual void UnlockEmuFramebuffer(const uint8_t bufferIndex);
 };
 
 class MacOGLDisplayView : public MacDisplayLayeredView

desmume/src/frontend/cocoa/userinterface/MacOGLDisplayView.mm

@@ -62,8 +62,8 @@
 
 - (void)drawInCGLContext:(CGLContextObj)glContext pixelFormat:(CGLPixelFormatObj)pixelFormat forLayerTime:(CFTimeInterval)timeInterval displayTime:(const CVTimeStamp *)timeStamp
 {
-	CGLSetCurrentContext(glContext);
 	CGLLockContext(glContext);
+	CGLSetCurrentContext(glContext);
 	((MacOGLDisplayPresenter *)(_cdv->Get3DPresenter()))->RenderFrameOGL(false);
 	[super drawInCGLContext:glContext pixelFormat:pixelFormat forLayerTime:timeInterval displayTime:timeStamp];
 	CGLUnlockContext(glContext);
@@ -156,6 +156,9 @@ MacOGLClientFetchObject::MacOGLClientFetchObject()
 	CGLSetCurrentContext(prevContext);
 	
 	_clientData = [[MacClientSharedObject alloc] init];
+	
+	_spinlockTexFetch[NDSDisplayID_Main]  = OS_SPINLOCK_INIT;
+	_spinlockTexFetch[NDSDisplayID_Touch] = OS_SPINLOCK_INIT;
 }
 
 NSOpenGLContext* MacOGLClientFetchObject::GetNSContext() const
@@ -195,12 +198,28 @@ void MacOGLClientFetchObject::FetchFromBufferIndex(const u8 index)
 	
 	CGLLockContext(this->_context);
 	CGLSetCurrentContext(this->_context);
-	this->GPUClientFetchObject::FetchFromBufferIndex(index);
+	this->OGLClientFetchObject::FetchFromBufferIndex(index);
 	CGLUnlockContext(this->_context);
 	
 	pthread_rwlock_unlock([sharedViewObject rwlockFramebufferAtIndex:index]);
 }
 
+GLuint MacOGLClientFetchObject::GetFetchTexture(const NDSDisplayID displayID)
+{
+	OSSpinLockLock(&this->_spinlockTexFetch[displayID]);
+	const GLuint texFetchID = this->OGLClientFetchObject::GetFetchTexture(displayID);
+	OSSpinLockUnlock(&this->_spinlockTexFetch[displayID]);
+	
+	return texFetchID;
+}
+
+void MacOGLClientFetchObject::SetFetchTexture(const NDSDisplayID displayID, GLuint texID)
+{
+	OSSpinLockLock(&this->_spinlockTexFetch[displayID]);
+	this->OGLClientFetchObject::SetFetchTexture(displayID, texID);
+	OSSpinLockUnlock(&this->_spinlockTexFetch[displayID]);
+}
+
 #pragma mark -
 
 void MacOGLDisplayPresenter::operator delete(void *ptr)
@@ -275,6 +294,7 @@ void MacOGLDisplayPresenter::__InstanceInit(MacClientSharedObject *sharedObject)
 	
 	_nsContext = nil;
 	_context = nil;
+	_spinlockProcessedInfo = OS_SPINLOCK_INIT;
 	
 	if (sharedObject != nil)
 	{
@@ -394,27 +414,41 @@ void MacOGLDisplayPresenter::CopyFrameToBuffer(uint32_t *dstBuffer)
 	CGLUnlockContext(this->_context);
 }
 
-void MacOGLDisplayPresenter::FinishFrameAtIndex(const uint8_t bufferIndex)
+const OGLProcessedFrameInfo& MacOGLDisplayPresenter::GetProcessedFrameInfo()
 {
-	CGLLockContext(this->_context);
+	OSSpinLockLock(&this->_spinlockProcessedInfo);
-	CGLSetCurrentContext(this->_context);
+	const OGLProcessedFrameInfo &processedInfo = this->OGLVideoOutput::GetProcessedFrameInfo();
-	this->OGLVideoOutput::FinishFrameAtIndex(bufferIndex);
+	OSSpinLockUnlock(&this->_spinlockProcessedInfo);
-	CGLUnlockContext(this->_context);
+	
+	return processedInfo;
 }
 
-void MacOGLDisplayPresenter::LockDisplayTextures()
+void MacOGLDisplayPresenter::SetProcessedFrameInfo(const OGLProcessedFrameInfo &processedInfo)
+{
+	OSSpinLockLock(&this->_spinlockProcessedInfo);
+	this->OGLVideoOutput::SetProcessedFrameInfo(processedInfo);
+	OSSpinLockUnlock(&this->_spinlockProcessedInfo);
+}
+
+void MacOGLDisplayPresenter::WriteLockEmuFramebuffer(const uint8_t bufferIndex)
+{
+	const GPUClientFetchObject &fetchObj = this->GetFetchObject();
+	MacClientSharedObject *sharedViewObject = (MacClientSharedObject *)fetchObj.GetClientData();
+	
+	pthread_rwlock_wrlock([sharedViewObject rwlockFramebufferAtIndex:bufferIndex]);
+}
+
+void MacOGLDisplayPresenter::ReadLockEmuFramebuffer(const uint8_t bufferIndex)
 {
 	const GPUClientFetchObject &fetchObj = this->GetFetchObject();
-	const u8 bufferIndex = this->_emuDisplayInfo.bufferIndex;
 	MacClientSharedObject *sharedViewObject = (MacClientSharedObject *)fetchObj.GetClientData();
 	
 	pthread_rwlock_rdlock([sharedViewObject rwlockFramebufferAtIndex:bufferIndex]);
 }
 
-void MacOGLDisplayPresenter::UnlockDisplayTextures()
+void MacOGLDisplayPresenter::UnlockEmuFramebuffer(const uint8_t bufferIndex)
 {
 	const GPUClientFetchObject &fetchObj = this->GetFetchObject();
-	const u8 bufferIndex = this->_emuDisplayInfo.bufferIndex;
 	MacClientSharedObject *sharedViewObject = (MacClientSharedObject *)fetchObj.GetClientData();
 	
 	pthread_rwlock_unlock([sharedViewObject rwlockFramebufferAtIndex:bufferIndex]);
@@ -460,14 +494,14 @@ bool MacOGLDisplayView::GetViewNeedsFlush()
 
 void MacOGLDisplayView::SetViewNeedsFlush()
 {
-	if (!this->_allowViewUpdates || (this->_presenter == nil) || (this->GetNSView() == nil))
+	if (!this->_allowViewUpdates || (this->_presenter == nil) || (this->_caLayer == nil))
 	{
 		return;
 	}
 	
 	if (this->GetRenderToCALayer())
 	{
-		[[this->GetNSView() layer] setNeedsDisplay];
+		[this->_caLayer setNeedsDisplay];
 	}
 	else
 	{

desmume/src/frontend/cocoa/utilities.c

@@ -119,6 +119,19 @@ bool IsOSXVersionSupported(const unsigned int major, const unsigned int minor, c
 	return result;
 }
 
+bool IsOSXVersion(const unsigned int major, const unsigned int minor, const unsigned int revision)
+{
+	bool result = false;
+	
+	if (!isSystemVersionAlreadyRead)
+	{
+		ReadSystemVersionPListFile();
+	}
+	
+	result = (isSystemVersionAlreadyRead && (OSXVersionMajor == major) && (OSXVersionMinor == minor) && (OSXVersionRevision == revision));
+	return result;
+}
+
 /********************************************************************************************
 	GetNearestPositivePOT()
 

desmume/src/frontend/cocoa/utilities.h

@@ -27,6 +27,7 @@ extern "C"
 #endif
 
 bool IsOSXVersionSupported(const unsigned int major, const unsigned int minor, const unsigned int revision);
+bool IsOSXVersion(const unsigned int major, const unsigned int minor, const unsigned int revision);
 uint32_t GetNearestPositivePOT(uint32_t value);
 
 #ifdef __cplusplus