add window context

CMakeLists.txt

@@ -22,5 +22,13 @@ FetchContent_Declare(
 	FIND_PACKAGE_ARGS
 )
 
+# TODO: compile with all rendering backends and select one at runtime
+set(QUARK_RENDERING_BACKEND "OPENGL" CACHE STRING "Rendering backend to use during engine compilation")
+set_property(CACHE QUARK_RENDERING_BACKEND PROPERTY STRINGS OPENGL VULKAN)
+
+if (${QUARK_RENDERING_BACKEND} STREQUAL "VULKAN")
+	find_package(Vulkan REQUIRED)
+endif()
+
 add_subdirectory(quark)
 add_subdirectory(sandbox)

quark/CMakeLists.txt

@@ -16,6 +16,8 @@ target_sources(quark
 	src/platform/linux/LinuxWindow.cpp
 	src/platform/linux/LinuxInput.cpp
 
+	src/platform/opengl/OpenGLContext.cpp
+
 	src/quark/imgui/ImGuiLayer.cpp
 
 	PUBLIC FILE_SET HEADERS
@@ -38,7 +40,11 @@ target_sources(quark
 	src/quark/events/KeyEvent.hpp
 	src/quark/events/MouseEvent.hpp
 
+	src/platform/opengl/OpenGLContext.hpp
+
 	src/quark/imgui/ImGuiLayer.hpp
+
+	src/quark/photon/RenderingContext.hpp
 )
 
 target_include_directories(quark INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/src)
@@ -54,7 +60,6 @@ target_compile_definitions(quark
 
 target_link_libraries(quark
 	PRIVATE
-	glad
 	glfw
 
 	PUBLIC
@@ -63,6 +68,13 @@ target_link_libraries(quark
 	glm
 )
 
+if (${QUARK_RENDERING_BACKEND} STREQUAL "OPENGL") 
+	target_link_libraries(quark PRIVATE glad)
+elseif (${QUARK_RENDERING_BACKEND} STREQUAL "VULKAN")
+	target_link_libraries(quark PRIVATE Vulkan::Vulkan)
+endif()
+
+
 include(GNUInstallDirs)
 install(
 	TARGETS quark

quark/src/platform/linux/LinuxWindow.cpp

@@ -1,4 +1,7 @@
 #include "LinuxWindow.hpp"
+
+#include "platform/opengl/OpenGLContext.hpp"
+
 #include "quark/Core.hpp"
 #include "quark/Logger.hpp"
 #include "quark/events/ApplicationEvent.hpp"
@@ -6,7 +9,6 @@
 #include "quark/events/MouseEvent.hpp"
 
 #include <GLFW/glfw3.h>
-#include <glad/gl.h>
 
 namespace qk {
 	static bool GLFWInitialized = false;
@@ -32,6 +34,7 @@ namespace qk {
 		data.width = config.width;
 		data.height = config.height;
 
+
 		QK_CORE_INFO("Creating window {0} ({1}x{2})", data.title, data.width, data.height);
 
 		if (!GLFWInitialized) {
@@ -47,12 +50,9 @@ namespace qk {
 		glfwWindowHintString(GLFW_X11_CLASS_NAME, "testclass");
 
 		window = glfwCreateWindow((int)config.width, (int)config.height, config.title.c_str(), nullptr, nullptr);
-		glfwMakeContextCurrent(window);
 
-		int version = gladLoadGL(glfwGetProcAddress);
-		QK_CORE_ASSERT(version, "Failed to load OpenGL");
-
-		QK_CORE_INFO("Loaded OpenGL {0}.{1}", GLAD_VERSION_MAJOR(version), GLAD_VERSION_MINOR(version));
+		context = std::make_unique<OpenGLContext>(window);
+		context->Init();
 
 		glfwSetWindowUserPointer(window, &data);
 
@@ -145,7 +145,7 @@ namespace qk {
 
 	void LinuxWindow::OnUpdate() {
 		glfwPollEvents();
-		glfwSwapBuffers(window);
+		context->SwapBuffers();
 	}
 
 	constexpr void LinuxWindow::SetVSync(bool enabled) {

quark/src/platform/linux/LinuxWindow.hpp

@@ -2,7 +2,9 @@
 
 #include <GLFW/glfw3.h>
 #include <any>
+#include <memory>
 #include "quark/Window.hpp"
+#include "quark/photon/RenderingContext.hpp"
 
 namespace qk {
 	class LinuxWindow :
@@ -33,6 +35,7 @@ namespace qk {
 
 	private:
 		GLFWwindow* window;
+		std::unique_ptr<RenderingContext> context;
 
 		struct WindowData {
 			std::string title;

quark/src/platform/opengl/OpenGLContext.cpp

@@ -0,0 +1,27 @@
+#include "OpenGLContext.hpp"
+#include "quark/Core.hpp"
+
+#include <GLFW/glfw3.h>
+#include <glad/gl.h>
+
+namespace qk {
+	OpenGLContext::OpenGLContext(GLFWwindow* window) :
+		window(window)
+	{
+		
+	}
+
+	void OpenGLContext::Init() {
+		glfwMakeContextCurrent(window);
+
+		int version = gladLoadGL(glfwGetProcAddress);
+		QK_CORE_ASSERT(version, "Failed to load OpenGL");
+
+		QK_CORE_INFO("Set up OpenGL context: {0}.{1}", GLAD_VERSION_MAJOR(version), GLAD_VERSION_MINOR(version));
+
+	}
+
+	void OpenGLContext::SwapBuffers() {
+		glfwSwapBuffers(window);	
+	}
+}

quark/src/platform/opengl/OpenGLContext.hpp

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "quark/photon/RenderingContext.hpp"
+
+struct GLFWwindow;
+
+namespace qk {
+	class OpenGLContext :
+		public RenderingContext
+	{
+	public:
+		OpenGLContext(GLFWwindow* window);
+
+		virtual void Init() override;
+		virtual void SwapBuffers() override;
+
+	private:
+		GLFWwindow* window;
+	};
+}

quark/src/quark/Application.cpp

@@ -39,7 +39,7 @@ namespace qk {
 	}
 
 	void Application::OnEvent(Event& e) {
-		QK_CORE_TRACE(e);
+		// QK_CORE_TRACE(e);
 
 		EventDispatcher dispatcher(e);
 		dispatcher.Dispatch<WindowCloseEvent>(std::bind(&Application::OnWindowClose, this, std::placeholders::_1));

quark/src/quark/imgui/ImGuiLayer.cpp

@@ -1,7 +1,6 @@
 #include "ImGuiLayer.hpp"
 
 // TODO: Remove these, these are temporary
-#include <glad/gl.h>
 #include <GLFW/glfw3.h>
 
 #include <imgui.h>

quark/src/quark/photon/RenderingContext.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+namespace qk {
+	class RenderingContext {
+	public:
+		virtual ~RenderingContext() { }
+
+		virtual void Init() = 0;
+		virtual void SwapBuffers() = 0;
+	};
+}

quark/vendor/CMakeLists.txt

@@ -2,18 +2,15 @@
 # GLAD
 ########################
 
-add_library(glad
-	glad/src/gl.c
-)
+if (${QUARK_RENDERING_BACKEND} STREQUAL "OPENGL")
+	add_library(glad
+		glad/src/gl.c
+	)
 
-target_include_directories(glad
-	PUBLIC glad/include
-)
-
-set_property(
-	TARGET glad
-	PROPERTY POSITION_INDEPENDENT_CODE ON
-)
+	target_include_directories(glad
+		PUBLIC glad/include
+	)
+endif()
 
 ########################
 # ImGui
@@ -27,19 +24,19 @@ add_library(imgui
 	imgui/imgui_demo.cpp
 
 	# TODO: this is shit
-	imgui/backends/imgui_impl_opengl3.cpp
 	imgui/backends/imgui_impl_glfw.cpp
 )
 
+if (${QUARK_RENDERING_BACKEND} STREQUAL "OPENGL")
+	target_sources(imgui PRIVATE imgui/backends/imgui_impl_opengl3.cpp)
+elseif (${QUARK_RENDERING_BACKEND} STREQUAL "VULKAN")
+	target_sources(imgui PRIVATE imgui/backends/imgui_impl_vulkan.cpp)
+endif()
+
 target_include_directories(imgui
 	PUBLIC imgui
 )
 
-set_property(
-	TARGET imgui
-	PROPERTY POSITION_INDEPENDENT_CODE ON
-)
-
 ########################
 # GLM
 ########################

sandbox/src/Application.cpp

@@ -30,7 +30,7 @@ public:
 	}
 
 	void OnEvent(qk::Event& event) override {
-		QK_TRACE(event);
+		// QK_TRACE(event);
 	}
 };