From 7faf5ea170f23de3b4a7b9362926490c5b7a97bc Mon Sep 17 00:00:00 2001
From: Silent <zdanio95@gmail.com>
Date: Sun, 10 Nov 2019 22:33:33 +0100
Subject: [PATCH] Clear the UI after async shader compilation

---
 Source/Core/VideoCommon/ShaderCache.cpp | 53 ++++++++++++++-----------
 1 file changed, 30 insertions(+), 23 deletions(-)

diff --git a/Source/Core/VideoCommon/ShaderCache.cpp b/Source/Core/VideoCommon/ShaderCache.cpp
index b5d848238a..35ce392be2 100644
--- a/Source/Core/VideoCommon/ShaderCache.cpp
+++ b/Source/Core/VideoCommon/ShaderCache.cpp
@@ -159,35 +159,42 @@ void ShaderCache::WaitForAsyncCompiler()
 {
   bool running = true;
 
+  constexpr auto update_ui_progress = [](size_t completed, size_t total) {
+    g_renderer->BeginUIFrame();
+
+    const float center_x = ImGui::GetIO().DisplaySize.x * 0.5f;
+    const float center_y = ImGui::GetIO().DisplaySize.y * 0.5f;
+    const float scale = ImGui::GetIO().DisplayFramebufferScale.x;
+
+    ImGui::SetNextWindowSize(ImVec2(400.0f * scale, 50.0f * scale), ImGuiCond_Always);
+    ImGui::SetNextWindowPos(ImVec2(center_x, center_y), ImGuiCond_Always, ImVec2(0.5f, 0.5f));
+    if (ImGui::Begin(Common::GetStringT("Compiling Shaders").c_str(), nullptr,
+                     ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoInputs |
+                         ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoSavedSettings |
+                         ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoNav |
+                         ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoFocusOnAppearing))
+    {
+      ImGui::Text("Compiling shaders: %zu/%zu", completed, total);
+      ImGui::ProgressBar(static_cast<float>(completed) /
+                             static_cast<float>(std::max(total, static_cast<size_t>(1))),
+                         ImVec2(-1.0f, 0.0f), "");
+    }
+    ImGui::End();
+
+    g_renderer->EndUIFrame();
+  };
+
   while (running &&
          (m_async_shader_compiler->HasPendingWork() || m_async_shader_compiler->HasCompletedWork()))
   {
-    running = m_async_shader_compiler->WaitUntilCompletion([](size_t completed, size_t total) {
-      g_renderer->BeginUIFrame();
+    running = m_async_shader_compiler->WaitUntilCompletion(update_ui_progress);
 
-      const float center_x = ImGui::GetIO().DisplaySize.x * 0.5f;
-      const float center_y = ImGui::GetIO().DisplaySize.y * 0.5f;
-      const float scale = ImGui::GetIO().DisplayFramebufferScale.x;
-
-      ImGui::SetNextWindowSize(ImVec2(400.0f * scale, 50.0f * scale), ImGuiCond_Always);
-      ImGui::SetNextWindowPos(ImVec2(center_x, center_y), ImGuiCond_Always, ImVec2(0.5f, 0.5f));
-      if (ImGui::Begin(Common::GetStringT("Compiling Shaders").c_str(), nullptr,
-                       ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoInputs |
-                           ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoSavedSettings |
-                           ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoNav |
-                           ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoFocusOnAppearing))
-      {
-        ImGui::Text("Compiling shaders: %zu/%zu", completed, total);
-        ImGui::ProgressBar(static_cast<float>(completed) /
-                               static_cast<float>(std::max(total, static_cast<size_t>(1))),
-                           ImVec2(-1.0f, 0.0f), "");
-      }
-      ImGui::End();
-
-      g_renderer->EndUIFrame();
-    });
     m_async_shader_compiler->RetrieveWorkItems();
   }
+
+  // Just render nothing to clear the screen
+  g_renderer->BeginUIFrame();
+  g_renderer->EndUIFrame();
 }
 
 template <typename SerializedUidType, typename UidType>