metal: create renderer

include/panda_qt/main_window.hpp

@@ -129,6 +129,7 @@ class MainWindow : public QMainWindow {
 	// Tracks whether we are using an OpenGL-backed renderer or a Vulkan-backed renderer
 	bool usingGL = false;
 	bool usingVk = false;
+	bool usingMtl = false;
 
 	// Variables to keep track of whether the user is controlling the 3DS analog stick with their keyboard
 	// This is done so when a gamepad is connected, we won't automatically override the 3DS analog stick settings with the gamepad's state

include/renderer.hpp

@@ -17,7 +17,8 @@ enum class RendererType : s8 {
 	Null = 0,
 	OpenGL = 1,
 	Vulkan = 2,
-	Software = 3,
+	Metal = 3,
+	Software = 4,
 };
 
 struct EmulatorConfig;

include/renderer_gl/surface_cache.hpp

@@ -19,8 +19,8 @@ template <typename SurfaceType, size_t capacity, bool evictOnOverflow = false>
 class SurfaceCache {
     // Vanilla std::optional can't hold actual references
     using OptionalRef = std::optional<std::reference_wrapper<SurfaceType>>;
-    static_assert(std::is_same<SurfaceType, ColourBuffer>() || std::is_same<SurfaceType, DepthBuffer>()  ||
-        std::is_same<SurfaceType, Texture>(), "Invalid surface type");
+    //static_assert(std::is_same<SurfaceType, ColourBuffer>() || std::is_same<SurfaceType, DepthBuffer>()  ||
+    //    std::is_same<SurfaceType, Texture>(), "Invalid surface type");
 
     size_t size;
     size_t evictionIndex;

src/core/PICA/gpu.cpp

@@ -15,6 +15,9 @@
 #ifdef PANDA3DS_ENABLE_VULKAN
 #include "renderer_vk/renderer_vk.hpp"
 #endif
+#ifdef PANDA3DS_ENABLE_METAL
+#include "renderer_mtl/renderer_mtl.hpp"
+#endif
 
 constexpr u32 topScreenWidth = 240;
 constexpr u32 topScreenHeight = 400;
@@ -52,6 +55,12 @@ GPU::GPU(Memory& mem, EmulatorConfig& config) : mem(mem), config(config) {
 			renderer.reset(new RendererVK(*this, regs, externalRegs));
 			break;
 		}
+#endif
+#ifdef PANDA3DS_ENABLE_METAL
+		case RendererType::Metal: {
+			renderer.reset(new RendererMTL(*this, regs, externalRegs));
+			break;
+		}
 #endif
 		default: {
 			Helpers::panic("Rendering backend not supported: %s", Renderer::typeToString(config.rendererType));
@@ -365,7 +374,7 @@ PICA::Vertex GPU::getImmediateModeVertex() {
 
 	// Run VS and return vertex data. TODO: Don't hardcode offsets for each attribute
 	shaderUnit.vs.run();
-	
+
 	// Map shader outputs to fixed function properties
 	const u32 totalShaderOutputs = regs[PICA::InternalRegs::ShaderOutputCount] & 7;
 	for (int i = 0; i < totalShaderOutputs; i++) {

src/panda_qt/main_window.cpp

@@ -103,6 +103,7 @@ MainWindow::MainWindow(QApplication* app, QWidget* parent) : QMainWindow(parent)
 		const RendererType rendererType = emu->getConfig().rendererType;
 		usingGL = (rendererType == RendererType::OpenGL || rendererType == RendererType::Software || rendererType == RendererType::Null);
 		usingVk = (rendererType == RendererType::Vulkan);
+		usingMtl = (rendererType == RendererType::Metal);
 
 		if (usingGL) {
 			// Make GL context current for this thread, enable VSync
@@ -113,6 +114,8 @@ MainWindow::MainWindow(QApplication* app, QWidget* parent) : QMainWindow(parent)
 			emu->initGraphicsContext(glContext);
 		} else if (usingVk) {
 			Helpers::panic("Vulkan on Qt is currently WIP, try the SDL frontend instead!");
+		} else if (usingMtl) {
+			Helpers::panic("Metal on Qt currently doesn't work, try the SDL frontend instead!");
 		} else {
 			Helpers::panic("Unsupported graphics backend for Qt frontend!");
 		}
@@ -628,4 +631,4 @@ void MainWindow::setupControllerSensors(SDL_GameController* controller) {
 	if (haveGyro) {
 		SDL_GameControllerSetSensorEnabled(controller, SDL_SENSOR_GYRO, SDL_TRUE);
 	}
-}
+}

src/panda_sdl/frontend_sdl.cpp

@@ -67,6 +67,16 @@ FrontendSDL::FrontendSDL() : keyboardMappings(InputMappings::defaultKeyboardMapp
 	}
 #endif
 
+#ifdef PANDA3DS_ENABLE_METAL
+	if (config.rendererType == RendererType::Metal) {
+		window = SDL_CreateWindow("Alber", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 400, 480, SDL_WINDOW_METAL | SDL_WINDOW_RESIZABLE);
+
+		if (window == nullptr) {
+			Helpers::warn("Window creation failed: %s", SDL_GetError());
+		}
+	}
+#endif
+
 	emu.initGraphicsContext(window);
 }
 
@@ -286,7 +296,7 @@ void FrontendSDL::run() {
 					}
 					break;
 				}
-									
+
 				case SDL_CONTROLLERSENSORUPDATE: {
 					if (event.csensor.sensor == SDL_SENSOR_GYRO) {
 						auto rotation = Gyro::SDL::convertRotation({
@@ -370,4 +380,4 @@ void FrontendSDL::setupControllerSensors(SDL_GameController* controller) {
 	if (haveGyro) {
 		SDL_GameControllerSetSensorEnabled(controller, SDL_SENSOR_GYRO, SDL_TRUE);
 	}
-}
+}

src/renderer.cpp

@@ -17,6 +17,7 @@ std::optional<RendererType> Renderer::typeFromString(std::string inString) {
 		{"null", RendererType::Null},         {"nil", RendererType::Null},      {"none", RendererType::Null},
 		{"gl", RendererType::OpenGL},         {"ogl", RendererType::OpenGL},    {"opengl", RendererType::OpenGL},
 		{"vk", RendererType::Vulkan},         {"vulkan", RendererType::Vulkan}, {"vulcan", RendererType::Vulkan},
+		{"mtl", RendererType::Metal},         {"metal", RendererType::Metal},
 		{"sw", RendererType::Software},       {"soft", RendererType::Software}, {"software", RendererType::Software},
 		{"softrast", RendererType::Software},
 	};
@@ -33,7 +34,8 @@ const char* Renderer::typeToString(RendererType rendererType) {
 		case RendererType::Null: return "null";
 		case RendererType::OpenGL: return "opengl";
 		case RendererType::Vulkan: return "vulkan";
+		case RendererType::Metal: return "metal";
 		case RendererType::Software: return "software";
 		default: return "Invalid";
 	}
-}
+}