Merge NativeUpdate and NativeRender, we always call them together.

Common/System/NativeApp.h

@@ -49,21 +49,16 @@ void NativeSetRestarting();
 // Retrieve current restarting flag.
 bool NativeIsRestarting();
 
-// Called ~sixty times a second, delivers the current input state.
-// Main thread.
-void NativeUpdate();
-
-// Delivers touch events "instantly", without waiting for the next frame so that NativeUpdate can deliver.
-// Useful for triggering audio events, saving a few ms.
-// If you don't care about touch latency, just do a no-op implementation of this.
-// time is not yet implemented. finger can be from 0 to 7, inclusive.
+// Delivers touch/key/axis events "instantly", without waiting for the next frame so that NativeFrame can deliver.
+// Some systems like UI will buffer these events internally but at least in gameplay we can get the minimum possible
+// input latency - assuming your main loop is architected properly (NativeFrame called from a different thread than input event handling).
 void NativeTouch(const TouchInput &touch);
 bool NativeKey(const KeyInput &key);
 void NativeAxis(const AxisInput &axis);
 
-// Called when it's time to render. If the device can keep up, this
-// will also be called sixty times per second. Main thread.
-void NativeRender(GraphicsContext *graphicsContext);
+// Called when it's process a frame, including rendering. If the device can keep up, this
+// will be called sixty times per second. Main thread.
+void NativeFrame(GraphicsContext *graphicsContext);
 
 // This should render num_samples 44khz stereo samples.
 // Try not to make too many assumptions on the granularity

Common/System/Request.h

@@ -29,7 +29,7 @@ public:
 	void PostSystemSuccess(int requestId, const char *responseString, int responseValue = 0);
 	void PostSystemFailure(int requestId);
 
-	// This must be called every frame from the beginning of NativeUpdate().
+	// This must be called every frame from the beginning of NativeFrame().
 	// This will call the callback of any finished requests.
 	void ProcessRequests();
 

Core/Core.cpp

@@ -210,8 +210,7 @@ void UpdateRunLoop() {
 		sleep_ms(16);
 		return;
 	}
-	NativeUpdate();
-	NativeRender(graphicsContext);
+	NativeFrame(graphicsContext);
 }
 
 void KeepScreenAwake() {
@@ -325,7 +324,7 @@ void Core_ProcessStepping() {
 }
 
 // Many platforms, like Android, do not call this function but handle things on their own.
-// Instead they simply call NativeRender and NativeUpdate directly.
+// Instead they simply call NativeFrame directly.
 bool Core_Run(GraphicsContext *ctx) {
 	System_Notify(SystemNotification::DISASSEMBLY);
 	while (true) {

UI/NativeApp.cpp

@@ -151,6 +151,8 @@
 
 #include <Core/HLE/Plugins.h>
 
+void HandleGlobalMessage(const std::string &msg, const std::string &value);
+
 ScreenManager *g_screenManager;
 std::string config_filename;
 
@@ -1047,14 +1049,43 @@ void RenderOverlays(UIContext *dc, void *userdata) {
 	}
 }
 
-void NativeRender(GraphicsContext *graphicsContext) {
+void NativeFrame(GraphicsContext *graphicsContext) {
+	PROFILE_END_FRAME();
+
+	std::vector<PendingMessage> toProcess;
+	{
+		std::lock_guard<std::mutex> lock(pendingMutex);
+		toProcess = std::move(pendingMessages);
+		pendingMessages.clear();
+	}
+
+	for (const auto &item : toProcess) {
+		HandleGlobalMessage(item.msg, item.value);
+		g_screenManager->sendMessage(item.msg.c_str(), item.value.c_str());
+	}
+
+	g_requestManager.ProcessRequests();
+
+	// it's ok to call this redundantly with DoFrame from EmuScreen
+	Achievements::Idle();
+
+	g_DownloadManager.Update();
+	g_screenManager->update();
+
+	g_Discord.Update();
+	g_BackgroundAudio.Play();
+
+	g_OSD.Update();
+
+	UI::SetSoundEnabled(g_Config.bUISound);
+
 	_dbg_assert_(graphicsContext != nullptr);
 	_dbg_assert_(g_screenManager != nullptr);
 
 	g_GameManager.Update();
 
 	if (GetUIState() != UISTATE_INGAME) {
-		// Note: We do this from NativeRender so that the graphics context is
+		// Note: We do this from NativeFrame so that the graphics context is
 		// guaranteed valid, to be safe - g_gameInfoCache messes around with textures.
 		g_BackgroundAudio.Update();
 	}
@@ -1206,37 +1237,6 @@ void HandleGlobalMessage(const std::string &msg, const std::string &value) {
 	}
 }
 
-void NativeUpdate() {
-	PROFILE_END_FRAME();
-
-	std::vector<PendingMessage> toProcess;
-	{
-		std::lock_guard<std::mutex> lock(pendingMutex);
-		toProcess = std::move(pendingMessages);
-		pendingMessages.clear();
-	}
-
-	for (const auto &item : toProcess) {
-		HandleGlobalMessage(item.msg, item.value);
-		g_screenManager->sendMessage(item.msg.c_str(), item.value.c_str());
-	}
-
-	g_requestManager.ProcessRequests();
-
-	// it's ok to call this redundantly with DoFrame from EmuScreen
-	Achievements::Idle();
-
-	g_DownloadManager.Update();
-	g_screenManager->update();
-
-	g_Discord.Update();
-	g_BackgroundAudio.Play();
-
-	g_OSD.Update();
-
-	UI::SetSoundEnabled(g_Config.bUISound);
-}
-
 bool NativeIsAtTopLevel() {
 	// This might need some synchronization?
 	if (!g_screenManager) {

UWP/PPSSPP_UWPMain.cpp

@@ -165,7 +165,6 @@ void PPSSPP_UWPMain::CreateWindowSizeDependentResources() {
 // Returns true if the frame was rendered and is ready to be displayed.
 bool PPSSPP_UWPMain::Render() {
 	ctx_->GetDrawContext()->HandleEvent(Draw::Event::PRESENTED, 0, 0, nullptr, nullptr);
-	NativeUpdate();
 
 	static bool hasSetThreadName = false;
 	if (!hasSetThreadName) {
@@ -212,7 +211,7 @@ bool PPSSPP_UWPMain::Render() {
 
 	context->RSSetViewports(1, &viewport);
 
-	NativeRender(ctx_.get());
+	NativeFrame(ctx_.get());
 	return true;
 }
 

android/jni/app-android.cpp

@@ -1121,8 +1121,7 @@ extern "C" void JNICALL Java_org_ppsspp_ppsspp_NativeApp_sendRequestResult(JNIEn
 
 void LockedNativeUpdateRender() {
 	std::lock_guard<std::mutex> renderGuard(renderLock);
-	NativeUpdate();
-	NativeRender(graphicsContext);
+	NativeFrame(graphicsContext);
 }
 
 void UpdateRunLoopAndroid(JNIEnv *env) {

headless/Headless.cpp

@@ -94,8 +94,7 @@ public:
 };
 
 // Temporary hacks around annoying linking errors.
-void NativeUpdate() { }
-void NativeRender(GraphicsContext *graphicsContext) { }
+void NativeFrame(GraphicsContext *graphicsContext) { }
 void NativeResized() { }
 
 std::string System_GetProperty(SystemProperty prop) { return ""; }

ios/ViewController.mm

@@ -238,8 +238,7 @@ extern float g_safeInsetBottom;
 
 		INFO_LOG(SYSTEM, "Emulation thread starting\n");
 		while (threadEnabled) {
-			NativeUpdate();
-			NativeRender(graphicsContext);
+			NativeFrame(graphicsContext);
 		}
 
 

libretro/libretro.cpp

@@ -1704,8 +1704,7 @@ void System_Notify(SystemNotification notification) {
 }
 bool System_MakeRequest(SystemRequestType type, int requestId, const std::string &param1, const std::string &param2, int param3) { return false; }
 void System_PostUIMessage(const std::string &message, const std::string &param) {}
-void NativeUpdate() {}
-void NativeRender(GraphicsContext *graphicsContext) {}
+void NativeFrame(GraphicsContext *graphicsContext) {}
 void NativeResized() {}
 
 void System_Toast(const char *str) {}

unittest/JitHarness.cpp

@@ -37,8 +37,7 @@
 #include "Core/HLE/HLE.h"
 
 // Temporary hacks around annoying linking errors.  Copied from Headless.
-void NativeUpdate() { }
-void NativeRender(GraphicsContext *graphicsContext) { }
+void NativeFrame(GraphicsContext *graphicsContext) { }
 void NativeResized() { }
 
 bool System_MakeRequest(SystemRequestType type, int requestId, const std::string &param1, const std::string &param2, int param3) { return false; }