Frontend/GPU: Refactor context management

Changes the GraphicsContext to be managed by the GPU core. This
eliminates the need for the frontends to fool around with tricky
MakeCurrent/DoneCurrent calls that are dependent on the settings (such
as async gpu option).

This also refactors out the need to use QWidget::fromWindowContainer as
that caused issues with focus and input handling. Now we use a regular
QWidget and just access the native windowHandle() directly.

Another change is removing the debug tool setting in FrameMailbox.
Instead of trying to block the frontend until a new frame is ready, the
core will now take over presentation and draw directly to the window if
the renderer detects that its hooked by NSight or RenderDoc

Lastly, since it was in the way, I removed ScopeAcquireWindowContext and
replaced it with a simple subclass in GraphicsContext that achieves the
same result

5 files changed, 2 insertions, 29 deletions

diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp b/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp
index c0d373477..ee61179a0 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp
@@ -148,14 +148,6 @@ EmuWindow_SDL2_GL::~EmuWindow_SDL2_GL() {
     SDL_GL_DeleteContext(window_context);
 }
 
-void EmuWindow_SDL2_GL::MakeCurrent() {
-    core_context->MakeCurrent();
-}
-
-void EmuWindow_SDL2_GL::DoneCurrent() {
-    core_context->DoneCurrent();
-}
-
 void EmuWindow_SDL2_GL::RetrieveVulkanHandlers(void* get_instance_proc_addr, void* instance,
                                                void* surface) const {
     // Should not have been called from OpenGL
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.h b/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.h
index b80669ff0..e092021d7 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.h
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2_gl.h
@@ -13,8 +13,6 @@ public:
     explicit EmuWindow_SDL2_GL(Core::System& system, bool fullscreen);
     ~EmuWindow_SDL2_GL();
 
-    void MakeCurrent() override;
-    void DoneCurrent() override;
     void Present() override;
 
     /// Ignored in OpenGL
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp b/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp
index abcc58165..46d053f04 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp
@@ -111,14 +111,6 @@ EmuWindow_SDL2_VK::~EmuWindow_SDL2_VK() {
     vkDestroyInstance(vk_instance, nullptr);
 }
 
-void EmuWindow_SDL2_VK::MakeCurrent() {
-    // Unused on Vulkan
-}
-
-void EmuWindow_SDL2_VK::DoneCurrent() {
-    // Unused on Vulkan
-}
-
 void EmuWindow_SDL2_VK::RetrieveVulkanHandlers(void* get_instance_proc_addr, void* instance,
                                                void* surface) const {
     const auto instance_proc_addr = vkGetInstanceProcAddr;
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.h b/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.h
index 1eb8c0868..3dd1f3f61 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.h
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2_vk.h
@@ -13,8 +13,6 @@ public:
     explicit EmuWindow_SDL2_VK(Core::System& system, bool fullscreen);
     ~EmuWindow_SDL2_VK();
 
-    void MakeCurrent() override;
-    void DoneCurrent() override;
     void Present() override;
     void RetrieveVulkanHandlers(void* get_instance_proc_addr, void* instance,
                                 void* surface) const override;
diff --git a/src/yuzu_cmd/yuzu.cpp b/src/yuzu_cmd/yuzu.cpp
index babf4c3a4..e5db7d819 100644
--- a/src/yuzu_cmd/yuzu.cpp
+++ b/src/yuzu_cmd/yuzu.cpp
@@ -232,15 +232,8 @@ int main(int argc, char** argv) {
 
     system.Renderer().Rasterizer().LoadDiskResources();
 
-    // Acquire render context for duration of the thread if this is the rendering thread
-    if (!Settings::values.use_asynchronous_gpu_emulation) {
-        emu_window->MakeCurrent();
-    }
-    SCOPE_EXIT({
-        if (!Settings::values.use_asynchronous_gpu_emulation) {
-            emu_window->DoneCurrent();
-        }
-    });
+    // Core is loaded, start the GPU (makes the GPU contexts current to this thread)
+    system.GPU().Start();
 
     std::thread render_thread([&emu_window] { emu_window->Present(); });
     while (emu_window->IsOpen()) {