gpu: Report renderer errors with exceptions

Instead of using a two step initialization to report errors, initialize
the GPU renderer and rasterizer on the constructor and report errors
through std::runtime_error.

src/video_core/engines/fermi_2d.cpp

@@ -18,8 +18,8 @@ Fermi2D::Fermi2D() {
 
 Fermi2D::~Fermi2D() = default;
 
-void Fermi2D::BindRasterizer(VideoCore::RasterizerInterface& rasterizer_) {
-    rasterizer = &rasterizer_;
+void Fermi2D::BindRasterizer(VideoCore::RasterizerInterface* rasterizer_) {
+    rasterizer = rasterizer_;
 }
 
 void Fermi2D::CallMethod(u32 method, u32 method_argument, bool is_last_call) {

src/video_core/engines/fermi_2d.h

@@ -38,7 +38,7 @@ public:
     ~Fermi2D();
 
     /// Binds a rasterizer to this engine.
-    void BindRasterizer(VideoCore::RasterizerInterface& rasterizer);
+    void BindRasterizer(VideoCore::RasterizerInterface* rasterizer);
 
     /// Write the value to the register identified by method.
     void CallMethod(u32 method, u32 method_argument, bool is_last_call) override;

src/video_core/engines/kepler_compute.cpp

@@ -21,8 +21,8 @@ KeplerCompute::KeplerCompute(Core::System& system_, MemoryManager& memory_manage
 
 KeplerCompute::~KeplerCompute() = default;
 
-void KeplerCompute::BindRasterizer(VideoCore::RasterizerInterface& rasterizer_) {
-    rasterizer = &rasterizer_;
+void KeplerCompute::BindRasterizer(VideoCore::RasterizerInterface* rasterizer_) {
+    rasterizer = rasterizer_;
 }
 
 void KeplerCompute::CallMethod(u32 method, u32 method_argument, bool is_last_call) {

src/video_core/engines/kepler_compute.h

@@ -46,7 +46,7 @@ public:
     ~KeplerCompute();
 
     /// Binds a rasterizer to this engine.
-    void BindRasterizer(VideoCore::RasterizerInterface& rasterizer);
+    void BindRasterizer(VideoCore::RasterizerInterface* rasterizer);
 
     static constexpr std::size_t NumConstBuffers = 8;
 

src/video_core/engines/maxwell_3d.cpp

@@ -30,8 +30,8 @@ Maxwell3D::Maxwell3D(Core::System& system_, MemoryManager& memory_manager_)
 
 Maxwell3D::~Maxwell3D() = default;
 
-void Maxwell3D::BindRasterizer(VideoCore::RasterizerInterface& rasterizer_) {
-    rasterizer = &rasterizer_;
+void Maxwell3D::BindRasterizer(VideoCore::RasterizerInterface* rasterizer_) {
+    rasterizer = rasterizer_;
 }
 
 void Maxwell3D::InitializeRegisterDefaults() {

src/video_core/engines/maxwell_3d.h

@@ -55,7 +55,7 @@ public:
     ~Maxwell3D();
 
     /// Binds a rasterizer to this engine.
-    void BindRasterizer(VideoCore::RasterizerInterface& rasterizer);
+    void BindRasterizer(VideoCore::RasterizerInterface* rasterizer);
 
     /// Register structure of the Maxwell3D engine.
     /// TODO(Subv): This structure will need to be made bigger as more registers are discovered.