1 files changed, 91 insertions, 0 deletions
diff --git a/core/src/Entrypoint/main.cpp b/core/src/Entrypoint/main.cpp
new file mode 100644
index 0000000..3adf757
--- /dev/null
+++ b/core/src/Entrypoint/main.cpp
@@ -0,0 +1,91 @@
+#include "Entrypoint/Common.hpp"
+#include "Entrypoint/DirectX11.hpp"
+#include "Entrypoint/DirectX12.hpp"
+#include "Entrypoint/Metal.hpp"
+#include "Entrypoint/OpenGL2.hpp"
+#include "Entrypoint/OpenGL3.hpp"
+#include "Entrypoint/Vulkan.hpp"
+
+#include <glad/glad.h>
+
+#include <GLFW/glfw3.h>
+#include <imgui.h>
+#include <argparse/argparse.hpp>
+#include <iostream>
+#include <memory>
+#include <string>
+
+using namespace std::literals::string_literals;
+
+int main(int argc, char* argv[]) {
+	argparse::ArgumentParser parser;
+	parser.add_argument("--rendering-backend")
+		.help("Which rendering backend to use. If equals 'default', the preferred API for each platform will be used")
+		.default_value("default"s);
+
+	try {
+		parser.parse_args(argc, argv);
+	} catch (const std::runtime_error& error) {
+		std::cout << error.what() << '\n';
+		std::cout << parser;
+		return -1;
+	}
+
+	std::unique_ptr<RenderingBackend> backend;
+	auto backendOption = parser.get<std::string>("--rendering-backend");
+	if (backendOption == "default") {
+		// TODO better api selection mechanism, use lower tier if higher tier is unavilable instead of bailing
+#if PLATFORM_WIN32
+#	if IMGUI_INCLUDE_DX12_BACKEND
+		backend = std::make_unique<DirectX12Backend>();
+#	elif IMGUI_INCLUDE_DX11_BACKEND
+		backend = std::make_unique<DirectX11Backend>();
+#	elif IMGUI_INCLUDE_VULKAN_BACKEND
+		backend = std::make_unique<VulkanBackend>();
+#	elif IMGUI_INCLUDE_OPENGL3_BACKEND
+		backend = std::make_unique<OpenGL3Backend>();
+#	elif IMGUI_INCLUDE_OPENGL2_BACKEND
+		backend = std::make_unique<OpenGL2Backend>();
+#	endif
+#elif PLATFORM_MACOS
+		backend = std::make_unique<MetalBackend>();
+#elif PLATFORM_LINUX
+#	if IMGUI_INCLUDE_VULKAN_BACKEND
+		backend = std::make_unique<VulkanBackend>();
+// #	elif IMGUI_INCLUDE_OPENGL3_BACKEND
+// 		backend = std::make_unique<OpenGL3Backend>();
+#	elif IMGUI_INCLUDE_OPENGL2_BACKEND
+		backend = std::make_unique<OpenGL2Backend>();
+#	endif
+#endif
+	} else if (backendOption == "opengl2") {
+		backend = std::make_unique<OpenGL2Backend>();
+	} else if (backendOption == "opengl3") {
+		backend = std::make_unique<OpenGL3Backend>();
+	} else if (backendOption == "vulkan") {
+		backend = std::make_unique<VulkanBackend>();
+	} else if (backendOption == "dx11") {
+		backend = std::make_unique<DirectX11Backend>();
+	} else if (backendOption == "dx12") {
+		backend = std::make_unique<DirectX12Backend>();
+	} else if (backendOption == "metal") {
+		backend = std::make_unique<MetalBackend>();
+	} else {
+		std::cout << "Unknown backend '" << backendOption << "'.\n";
+		return -1;
+	}
+
+	auto& io = ImGui::GetIO();
+	io.Fonts->AddFontFromFileTTF("fonts/NotoSansSC-Regular.otf", 18, nullptr, io.Fonts->GetGlyphRangesChineseSimplifiedCommon());
+
+	auto window = backend->GetWindow();
+	bool showDemo = true;
+	while (!glfwWindowShouldClose(window)) {
+		backend->BeginFrame();
+		if (showDemo)
+			ImGui::ShowDemoWindow(&showDemo);
+		backend->EndFrame();
+	}
+
+	return 0;
+}