Improve error report from Init() functions

Add error popup when citra initialization failed

src/video_core/renderer_base.h

@@ -38,7 +38,7 @@ public:
     virtual void SetWindow(EmuWindow* window) = 0;
 
     /// Initialize the renderer
-    virtual void Init() = 0;
+    virtual bool Init() = 0;
 
     /// Shutdown the renderer
     virtual void ShutDown() = 0;

src/video_core/renderer_opengl/renderer_opengl.cpp

@@ -445,7 +445,7 @@ static void DebugHandler(GLenum source, GLenum type, GLuint id, GLenum severity,
 }
 
 /// Initialize the renderer
-void RendererOpenGL::Init() {
+bool RendererOpenGL::Init() {
     render_window->MakeCurrent();
 
     // TODO: Make frontends initialize this, so they can use gladLoadGLLoader with their own loaders
@@ -462,9 +462,15 @@ void RendererOpenGL::Init() {
     LOG_INFO(Render_OpenGL, "GL_VERSION: %s", glGetString(GL_VERSION));
     LOG_INFO(Render_OpenGL, "GL_VENDOR: %s", glGetString(GL_VENDOR));
     LOG_INFO(Render_OpenGL, "GL_RENDERER: %s", glGetString(GL_RENDERER));
+    if (!GLAD_GL_VERSION_3_3) {
+        return false;
+    }
+
     InitOpenGLObjects();
 
     RefreshRasterizerSetting();
+
+    return true;
 }
 
 /// Shutdown the renderer

src/video_core/renderer_opengl/renderer_opengl.h

@@ -31,7 +31,7 @@ public:
     void SetWindow(EmuWindow* window) override;
 
     /// Initialize the renderer
-    void Init() override;
+    bool Init() override;
 
     /// Shutdown the renderer
     void ShutDown() override;

src/video_core/video_core.cpp

@@ -28,15 +28,19 @@ std::atomic<bool> g_hw_renderer_enabled;
 std::atomic<bool> g_shader_jit_enabled;
 
 /// Initialize the video core
-void Init(EmuWindow* emu_window) {
+bool Init(EmuWindow* emu_window) {
     Pica::Init();
 
     g_emu_window = emu_window;
     g_renderer = Common::make_unique<RendererOpenGL>();
     g_renderer->SetWindow(g_emu_window);
-    g_renderer->Init();
-
-    LOG_DEBUG(Render, "initialized OK");
+    if (g_renderer->Init()) {
+        LOG_DEBUG(Render, "initialized OK");
+    } else {
+        LOG_ERROR(Render, "initialization failed !");
+        return false;
+    }
+    return true;
 }
 
 /// Shutdown the video core

src/video_core/video_core.h

@@ -41,7 +41,7 @@ extern std::atomic<bool> g_shader_jit_enabled;
 void Start();
 
 /// Initialize the video core
-void Init(EmuWindow* emu_window);
+bool Init(EmuWindow* emu_window);
 
 /// Shutdown the video core
 void Shutdown();