Android: Move screenshot waiting logic to Renderer

Source/Android/jni/MainAndroid.cpp

@@ -484,8 +484,7 @@ JNIEXPORT void JNICALL Java_org_dolphinemu_dolphinemu_NativeLibrary_StopEmulatio
                                                                                   jobject obj)
 {
   std::lock_guard<std::mutex> guard(s_host_identity_lock);
-  Core::SaveScreenShot("thumb");
-  g_renderer->s_screenshot_completed.WaitFor(std::chrono::seconds(2));
+  Core::SaveScreenShot("thumb", true);
   Core::Stop();
   updateMainFrameEvent.Set();  // Kick the waiting event
 }

Source/Core/Core/Core.cpp

@@ -732,19 +732,19 @@ static std::string GenerateScreenshotName()
   return name;
 }
 
-void SaveScreenShot()
+void SaveScreenShot(bool wait_for_completion)
 {
   const bool bPaused = GetState() == State::Paused;
 
   SetState(State::Paused);
 
-  g_renderer->SetScreenshot(GenerateScreenshotName());
+  g_renderer->SaveScreenshot(GenerateScreenshotName(), wait_for_completion);
 
   if (!bPaused)
     SetState(State::Running);
 }
 
-void SaveScreenShot(const std::string& name)
+void SaveScreenShot(const std::string& name, bool wait_for_completion)
 {
   const bool bPaused = GetState() == State::Paused;
 
@@ -752,7 +752,7 @@ void SaveScreenShot(const std::string& name)
 
   std::string filePath = GenerateScreenshotFolderPath() + name + ".png";
 
-  g_renderer->SetScreenshot(filePath);
+  g_renderer->SaveScreenshot(filePath, wait_for_completion);
 
   if (!bPaused)
     SetState(State::Running);

Source/Core/Core/Core.h

@@ -55,8 +55,8 @@ bool IsGPUThread();
 void SetState(State state);
 State GetState();
 
-void SaveScreenShot();
-void SaveScreenShot(const std::string& name);
+void SaveScreenShot(bool wait_for_completion = false);
+void SaveScreenShot(const std::string& name, bool wait_for_completion = false);
 
 void Callback_WiimoteInterruptChannel(int _number, u16 _channelID, const void* _pData, u32 _Size);
 

Source/Core/VideoCommon/RenderBase.cpp

@@ -276,11 +276,20 @@ void Renderer::ConvertStereoRectangle(const TargetRectangle& rc, TargetRectangle
   }
 }
 
-void Renderer::SetScreenshot(const std::string& filename)
+void Renderer::SaveScreenshot(const std::string& filename, bool wait_for_completion)
 {
+  // We must not hold the lock while waiting for the screenshot to complete.
+  {
     std::lock_guard<std::mutex> lk(m_screenshot_lock);
     m_screenshot_name = filename;
     m_screenshot_request.Set();
+  }
+
+  if (wait_for_completion)
+  {
+    // This is currently only used by Android, and it was using a wait time of 2 seconds.
+    m_screenshot_completed.WaitFor(std::chrono::seconds(2));
+  }
 }
 
 // Create On-Screen-Messages
@@ -814,7 +823,7 @@ void Renderer::RunFrameDumps()
 
       // Reset settings
       m_screenshot_name.clear();
-      s_screenshot_completed.Set();
+      m_screenshot_completed.Set();
     }
 
     if (SConfig::GetInstance().m_DumpFrames)

Source/Core/VideoCommon/RenderBase.h

@@ -111,7 +111,7 @@ public:
   float EFBToScaledXf(float x) { return x * ((float)GetTargetWidth() / (float)EFB_WIDTH); }
   float EFBToScaledYf(float y) { return y * ((float)GetTargetHeight() / (float)EFB_HEIGHT); }
   // Random utilities
-  void SetScreenshot(const std::string& filename);
+  void SaveScreenshot(const std::string& filename, bool wait_for_completion);
   void DrawDebugText();
 
   virtual void RenderText(const std::string& text, int left, int top, u32 color) = 0;
@@ -140,8 +140,6 @@ public:
   // Max height/width
   virtual u32 GetMaxTextureSize() = 0;
 
-  Common::Event s_screenshot_completed;
-
   // Final surface changing
   // This is called when the surface is resized (WX) or the window changes (Android).
   virtual void ChangeSurface(void* new_surface_handle) {}
@@ -158,6 +156,7 @@ protected:
   void FinishFrameData();
 
   Common::Flag m_screenshot_request;
+  Common::Event m_screenshot_completed;
   std::mutex m_screenshot_lock;
   std::string m_screenshot_name;