emu_window: Remove global system instance

It was just the one in emu_window_sdl2, but since _gl and _vk inherit
from it, they all needed adjustments.

Leaves just the one auto system& in main().

src/yuzu_cmd/emu_window/emu_window_sdl2.cpp

@@ -16,8 +16,8 @@
 #include "yuzu_cmd/emu_window/emu_window_sdl2.h"
 #include "yuzu_cmd/yuzu_icon.h"
 
-EmuWindow_SDL2::EmuWindow_SDL2(InputCommon::InputSubsystem* input_subsystem_)
-    : input_subsystem{input_subsystem_} {
+EmuWindow_SDL2::EmuWindow_SDL2(InputCommon::InputSubsystem* input_subsystem_, Core::System& system_)
+    : input_subsystem{input_subsystem_}, system{system_} {
     if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) {
         LOG_CRITICAL(Frontend, "Failed to initialize SDL2! Exiting...");
         exit(1);
@@ -218,7 +218,7 @@ void EmuWindow_SDL2::WaitEvent() {
 
     const u32 current_time = SDL_GetTicks();
     if (current_time > last_time + 2000) {
-        const auto results = Core::System::GetInstance().GetAndResetPerfStats();
+        const auto results = system.GetAndResetPerfStats();
         const auto title =
             fmt::format("yuzu {} | {}-{} | FPS: {:.0f} ({:.0f}%)", Common::g_build_fullname,
                         Common::g_scm_branch, Common::g_scm_desc, results.average_game_fps,

src/yuzu_cmd/emu_window/emu_window_sdl2.h

@@ -24,7 +24,7 @@ enum class MouseButton;
 
 class EmuWindow_SDL2 : public Core::Frontend::EmuWindow {
 public:
-    explicit EmuWindow_SDL2(InputCommon::InputSubsystem* input_subsystem);
+    explicit EmuWindow_SDL2(InputCommon::InputSubsystem* input_subsystem, Core::System& system_);
     ~EmuWindow_SDL2();
 
     /// Whether the window is still open, and a close request hasn't yet been sent
@@ -87,4 +87,7 @@ protected:
 
     /// Input subsystem to use with this window.
     InputCommon::InputSubsystem* input_subsystem;
+
+    /// yuzu core instance
+    Core::System& system;
 };

src/yuzu_cmd/emu_window/emu_window_sdl2_gl.cpp

@@ -76,8 +76,9 @@ bool EmuWindow_SDL2_GL::SupportsRequiredGLExtensions() {
     return unsupported_ext.empty();
 }
 
-EmuWindow_SDL2_GL::EmuWindow_SDL2_GL(InputCommon::InputSubsystem* input_subsystem, bool fullscreen)
-    : EmuWindow_SDL2{input_subsystem} {
+EmuWindow_SDL2_GL::EmuWindow_SDL2_GL(InputCommon::InputSubsystem* input_subsystem,
+                                     Core::System& system_, bool fullscreen)
+    : EmuWindow_SDL2{input_subsystem, system_} {
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 4);
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 6);
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_COMPATIBILITY);

src/yuzu_cmd/emu_window/emu_window_sdl2_gl.h

@@ -8,13 +8,18 @@
 #include "core/frontend/emu_window.h"
 #include "yuzu_cmd/emu_window/emu_window_sdl2.h"
 
+namespace Core {
+class System;
+}
+
 namespace InputCommon {
 class InputSubsystem;
 }
 
 class EmuWindow_SDL2_GL final : public EmuWindow_SDL2 {
 public:
-    explicit EmuWindow_SDL2_GL(InputCommon::InputSubsystem* input_subsystem, bool fullscreen);
+    explicit EmuWindow_SDL2_GL(InputCommon::InputSubsystem* input_subsystem, Core::System& system_,
+                               bool fullscreen);
     ~EmuWindow_SDL2_GL();
 
     std::unique_ptr<Core::Frontend::GraphicsContext> CreateSharedContext() const override;

src/yuzu_cmd/emu_window/emu_window_sdl2_vk.cpp

@@ -24,8 +24,9 @@
 #include <SDL.h>
 #include <SDL_syswm.h>
 
-EmuWindow_SDL2_VK::EmuWindow_SDL2_VK(InputCommon::InputSubsystem* input_subsystem, bool fullscreen)
-    : EmuWindow_SDL2{input_subsystem} {
+EmuWindow_SDL2_VK::EmuWindow_SDL2_VK(InputCommon::InputSubsystem* input_subsystem,
+                                     Core::System& system_, bool fullscreen)
+    : EmuWindow_SDL2{input_subsystem, system_} {
     const std::string window_title = fmt::format("yuzu {} | {}-{} (Vulkan)", Common::g_build_name,
                                                  Common::g_scm_branch, Common::g_scm_desc);
     render_window =

src/yuzu_cmd/emu_window/emu_window_sdl2_vk.h

@@ -19,7 +19,8 @@ class InputSubsystem;
 
 class EmuWindow_SDL2_VK final : public EmuWindow_SDL2 {
 public:
-    explicit EmuWindow_SDL2_VK(InputCommon::InputSubsystem* input_subsystem, bool fullscreen);
+    explicit EmuWindow_SDL2_VK(InputCommon::InputSubsystem* input_subsystem, Core::System& system,
+                               bool fullscreen);
     ~EmuWindow_SDL2_VK() override;
 
     std::unique_ptr<Core::Frontend::GraphicsContext> CreateSharedContext() const override;

src/yuzu_cmd/yuzu.cpp

@@ -172,10 +172,10 @@ int main(int argc, char** argv) {
     std::unique_ptr<EmuWindow_SDL2> emu_window;
     switch (Settings::values.renderer_backend.GetValue()) {
     case Settings::RendererBackend::OpenGL:
-        emu_window = std::make_unique<EmuWindow_SDL2_GL>(&input_subsystem, fullscreen);
+        emu_window = std::make_unique<EmuWindow_SDL2_GL>(&input_subsystem, system, fullscreen);
         break;
     case Settings::RendererBackend::Vulkan:
-        emu_window = std::make_unique<EmuWindow_SDL2_VK>(&input_subsystem, fullscreen);
+        emu_window = std::make_unique<EmuWindow_SDL2_VK>(&input_subsystem, system, fullscreen);
         break;
     }