OGL: Reload shader cache when relevant video config changes

Source/Core/VideoBackends/OGL/ProgramShaderCache.cpp

@@ -504,7 +504,44 @@ void ProgramShaderCache::Init()
 
   // Read our shader cache, only if supported and enabled
   if (g_ogl_config.bSupportsGLSLCache && g_ActiveConfig.bShaderCache)
-  {
+    LoadProgramBinaries();
+
+  CreateHeader();
+
+  CurrentProgram = 0;
+  last_entry = nullptr;
+}
+
+void ProgramShaderCache::Reload()
+{
+  const bool use_cache = g_ogl_config.bSupportsGLSLCache && g_ActiveConfig.bShaderCache;
+  if (use_cache)
+    SaveProgramBinaries();
+
+  g_program_disk_cache.Close();
+  DestroyShaders();
+
+  if (use_cache)
+    LoadProgramBinaries();
+
+  CurrentProgram = 0;
+  last_entry = nullptr;
+  last_uid = {};
+}
+
+void ProgramShaderCache::Shutdown()
+{
+  // store all shaders in cache on disk
+  if (g_ogl_config.bSupportsGLSLCache && g_ActiveConfig.bShaderCache)
+    SaveProgramBinaries();
+  g_program_disk_cache.Close();
+
+  DestroyShaders();
+  s_buffer.reset();
+}
+
+void ProgramShaderCache::LoadProgramBinaries()
+{
   GLint Supported;
   glGetIntegerv(GL_NUM_PROGRAM_BINARY_FORMATS, &Supported);
   if (!Supported)
@@ -518,27 +555,19 @@ void ProgramShaderCache::Init()
     if (!File::Exists(File::GetUserPath(D_SHADERCACHE_IDX)))
       File::CreateDir(File::GetUserPath(D_SHADERCACHE_IDX));
 
+    std::string host_part = g_ActiveConfig.GetHostConfigFilename();
     std::string cache_filename =
-          StringFromFormat("%sogl-%s-shaders.cache", File::GetUserPath(D_SHADERCACHE_IDX).c_str(),
-                           SConfig::GetInstance().GetGameID().c_str());
+        StringFromFormat("%sogl-%s-%s-shaders.cache", File::GetUserPath(D_SHADERCACHE_IDX).c_str(),
+                         SConfig::GetInstance().GetGameID().c_str(), host_part.c_str());
 
     ProgramShaderCacheInserter inserter;
     g_program_disk_cache.OpenAndRead(cache_filename, inserter);
   }
   SETSTAT(stats.numPixelShadersAlive, pshaders.size());
-  }
-
-  CreateHeader();
-
-  CurrentProgram = 0;
-  last_entry = nullptr;
 }
 
-void ProgramShaderCache::Shutdown()
+void ProgramShaderCache::SaveProgramBinaries()
 {
-  // store all shaders in cache on disk
-  if (g_ogl_config.bSupportsGLSLCache)
-  {
   for (auto& entry : pshaders)
   {
     // Clear any prior error code
@@ -572,9 +601,10 @@ void ProgramShaderCache::Shutdown()
   }
 
   g_program_disk_cache.Sync();
-    g_program_disk_cache.Close();
-  }
+}
 
+void ProgramShaderCache::DestroyShaders()
+{
   glUseProgram(0);
 
   for (auto& entry : pshaders)
@@ -582,8 +612,6 @@ void ProgramShaderCache::Shutdown()
     entry.second.Destroy();
   }
   pshaders.clear();
-
-  s_buffer.reset();
 }
 
 void ProgramShaderCache::CreateHeader()

Source/Core/VideoBackends/OGL/ProgramShaderCache.h

@@ -72,6 +72,7 @@ public:
   static void UploadConstants();
 
   static void Init();
+  static void Reload();
   static void Shutdown();
   static void CreateHeader();
 
@@ -82,6 +83,10 @@ private:
     void Read(const SHADERUID& key, const u8* value, u32 value_size) override;
   };
 
+  static void LoadProgramBinaries();
+  static void SaveProgramBinaries();
+  static void DestroyShaders();
+
   typedef std::map<SHADERUID, PCacheEntry> PCache;
   static PCache pshaders;
   static PCacheEntry* last_entry;

Source/Core/VideoBackends/OGL/Render.cpp

@@ -688,6 +688,7 @@ Renderer::Renderer()
 
   s_last_stereo_mode = g_ActiveConfig.iStereoMode > 0;
   s_last_xfb_mode = g_ActiveConfig.bUseRealXFB;
+  m_last_host_config_bits = g_ActiveConfig.GetHostConfigBits();
 
   // Handle VSync on/off
   s_vsync = g_ActiveConfig.IsVSync();
@@ -1469,6 +1470,15 @@ void Renderer::SwapImpl(u32 xfbAddr, u32 fbWidth, u32 fbStride, u32 fbHeight,
   UpdateActiveConfig();
   g_texture_cache->OnConfigChanged(g_ActiveConfig);
 
+  // Invalidate shader cache when the host config changes.
+  u32 new_host_config_bits = g_ActiveConfig.GetHostConfigBits();
+  if (new_host_config_bits != m_last_host_config_bits)
+  {
+    OSD::AddMessage("Video config changed, reloading shaders.", OSD::Duration::NORMAL);
+    ProgramShaderCache::Reload();
+    m_last_host_config_bits = new_host_config_bits;
+  }
+
   // For testing zbuffer targets.
   // Renderer::SetZBufferRender();
   // SaveTexture("tex.png", GL_TEXTURE_2D, s_FakeZTarget,

Source/Core/VideoBackends/OGL/Render.h

@@ -148,5 +148,8 @@ private:
   std::array<int, 2> m_last_frame_height = {};
   bool m_last_frame_exported = false;
   AVIDump::Frame m_last_frame_state;
+
+  // last host config state
+  u32 m_last_host_config_bits = 0;
 };
 }