We now have a blank window again.

.gitmodules

@@ -1,6 +1,6 @@
-[submodule "3rdparty/bgfx"]
-	path = 3rdparty/bgfx
-	url = git@github.com:JoshuaBrookover/bgfx.cmake.git
 [submodule "3rdparty/glfw"]
 	path = 3rdparty/glfw
 	url = git@github.com:glfw/glfw.git
+[submodule "3rdparty/spdlog"]
+	path = 3rdparty/spdlog
+	url = git@github.com:gabime/spdlog.git

3rdparty/CMakeLists.txt

@@ -0,0 +1,4 @@
+set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
+set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
+set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
+add_subdirectory(glfw)

3rdparty/bgfx

@@ -1 +0,0 @@
-Subproject commit 95cb070eb2101d42327fa040c50d9703612b09f4

3rdparty/spdlog

@@ -0,0 +1 @@
+Subproject commit bdfc7d2a5a4ad9cc1cebe1feb7e6fcc703840d71

CMakeLists.txt

@@ -1,7 +1,21 @@
-cmake_minimum_required(VERSION 3.13)
-project(OpenDiablo2)
+cmake_minimum_required(VERSION 3.0)
+
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
+    message(FATAL_ERROR "Do not build in-source. Please remove CMakeCache.txt and the CMakeFiles/ directory. Then build out-of-source.")
+endif()
+
+project(OpenDiablo2 CXX)
+
+include(CTest)
+include(CMakeDependentOption)
 
 set(CMAKE_CXX_STANDARD 17)
+set(OpenGL_GL_PREFERENCE "GLVND")
+
+set_property(GLOBAL PROPERTY USE_FOLDERS ON)
+
+add_subdirectory(3rdparty)
 
-add_subdirectory(OpenDiablo2.Game)
 add_subdirectory(OpenDiablo2.OS)
+add_subdirectory(OpenDiablo2.Graphics)
+add_subdirectory(OpenDiablo2.Game)

OpenDiablo2.Game/CMakeLists.txt

@@ -1,4 +1,25 @@
-add_executable(OpenDiablo2 src/main.cpp)
 
-include_directories(OpenDiablo2 ../OpenDiablo2.OS/include)
-target_link_libraries(OpenDiablo2 OpenDiablo2.OS)
+add_executable(OpenDiablo2
+    src/main.cpp
+    src/D2Engine.cpp
+)
+
+include_directories(OpenDiablo2
+    include
+    ../OpenDiablo2.OS/include
+    ../OpenDiablo2.Graphics/include
+    ../3rdparty/spdlog/include
+)
+target_link_libraries(OpenDiablo2
+    PUBLIC
+        OpenDiablo2.OS
+        OpenDiablo2.Graphics
+)
+
+target_compile_features(OpenDiablo2 PRIVATE cxx_std_17)
+
+if(MSVC)
+    target_compile_options(OpenDiablo2 PRIVATE /W4 /WX)
+else(MSVC)
+    target_compile_options(OpenDiablo2 PRIVATE -Wall -Wextra -pedantic -Werror)
+endif(MSVC)

OpenDiablo2.Game/include/OpenDiablo2.Game/D2Engine.h

@@ -0,0 +1,21 @@
+#ifndef OPENDIABLO2_D2ENGINE_H
+#define OPENDIABLO2_D2ENGINE_H
+
+#include <OpenDiablo2.OS/D2Window.h>
+#include <OpenDiablo2.Graphics/D2Graphics.h>
+
+namespace OpenDiablo2 {
+	namespace Game {
+		class D2Engine {
+		public:
+			D2Engine();
+			void Run();
+		private:
+			OpenDiablo2::OS::D2WindowPtr window;
+			OpenDiablo2::Graphics::D2GraphicsPtr gfx;
+		};
+	}
+}
+
+
+#endif //OPENDIABLO2_D2ENGINE_H

OpenDiablo2.Game/src/D2Engine.cpp

@@ -0,0 +1,21 @@
+#include <OpenDiablo2.Game/D2Engine.h>
+
+
+OpenDiablo2::Game::D2Engine::D2Engine() {
+	window = std::make_unique<OpenDiablo2::OS::D2Window>();
+	gfx = std::make_unique<OpenDiablo2::Graphics::D2Graphics>();
+}
+
+void
+OpenDiablo2::Game::D2Engine::Run() {
+	window->Initialize();
+
+	while (window->WindowStillOpen()) {
+		window->PollEvents();
+		gfx->Clear();
+
+		window->FlipBuffer();
+	}
+
+	window->Finalize();
+}

OpenDiablo2.Game/src/main.cpp

@@ -1,10 +1,18 @@
 #include <memory>
-#include <D2Window.h>
+#include <spdlog/spdlog.h>
+#include <spdlog/sinks/stdout_color_sinks.h>
+#include <OpenDiablo2.Game/D2Engine.h>
 
 int
 main() {
-	auto window = std::make_unique<OpenDiablo2::OS::D2Window>();
-	window->Run();
+	spdlog::set_level(spdlog::level::trace);
+	spdlog::set_pattern("[%^%l%$] %v");
+
+	spdlog::info("OpenDiablo 2 has started");
+
+	auto engine = std::make_unique<OpenDiablo2::Game::D2Engine>();
+	engine->Run();
+
 	return 0;
 }
 

OpenDiablo2.Graphics/CMakeLists.txt

@@ -0,0 +1,23 @@
+project(libOpenDiablo2.Graphics VERSION 0.1 LANGUAGES CXX)
+
+find_package(OpenGL)
+
+include_directories(
+    include
+    ../3rdparty/bgfx/include
+    ../3rdparty/spdlog/include
+    ${OPENGL_INCLUDE_DIRS}
+)
+
+add_library(OpenDiablo2.Graphics SHARED
+    src/D2Graphics.cpp
+)
+
+
+target_link_libraries(OpenDiablo2.Graphics ${OPENGL_LIBRARIES})
+
+if(MSVC)
+    target_compile_options(OpenDiablo2.Graphics PRIVATE /W4 /WX)
+else(MSVC)
+    target_compile_options(OpenDiablo2.Graphics PRIVATE -Wall -Wextra -pedantic -Werror)
+endif(MSVC)

OpenDiablo2.Graphics/include/OpenDiablo2.Graphics/D2Graphics.h

@@ -0,0 +1,21 @@
+#ifndef OPENDIABLO2_D2GRAPHICS_H
+#define OPENDIABLO2_D2GRAPHICS_H
+
+#include <memory>
+
+namespace OpenDiablo2 {
+	namespace Graphics {
+
+		class D2Graphics {
+		public:
+			D2Graphics();
+			void Clear();
+		private:
+		};
+
+		typedef std::unique_ptr<D2Graphics> D2GraphicsPtr;
+
+	}
+}
+
+#endif //OPENDIABLO2_D2GRAPHICS_H

OpenDiablo2.Graphics/src/D2Graphics.cpp

@@ -0,0 +1,18 @@
+#include <OpenDiablo2.Graphics/D2Graphics.h>
+#include <GL/gl.h>
+
+#include "OpenDiablo2.Graphics/D2Graphics.h"
+
+namespace OpenDiablo2 {
+	namespace Graphics {
+
+		D2Graphics::D2Graphics() = default;
+
+		void
+		D2Graphics::Clear() {
+			glClear(GL_COLOR_BUFFER_BIT);
+		}
+
+	}
+}
+

OpenDiablo2.OS/CMakeLists.txt

@@ -1,19 +1,19 @@
 project(libOpenDiablo2.OS VERSION 0.1 LANGUAGES CXX)
 
-set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
-set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
-set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
-add_subdirectory(../3rdparty/glfw build)
-
 include_directories(
     include
     ../3rdparty/glfw/include
+    ../3rdparty/spdlog/include
 )
 
-add_library(OpenDiablo2.OS
+add_library(OpenDiablo2.OS SHARED
     src/D2Window.cpp
 )
 
-target_link_libraries(OpenDiablo2.OS
-    glfw
-)
+target_link_libraries(OpenDiablo2.OS glfw)
+
+if(MSVC)
+    target_compile_options(OpenDiablo2.OS PRIVATE /W4 /WX)
+else(MSVC)
+    target_compile_options(OpenDiablo2.OS PRIVATE -Wall -Wextra -pedantic -Werror)
+endif(MSVC)

OpenDiablo2.OS/include/OpenDiablo2.OS/D2Window.h

@@ -2,23 +2,22 @@
 #define OPENDIABLO2_WINDOW_H
 
 #include <memory>
-#include <GLFW/glfw3.h>
 
 
+class GLFWwindow;
+
 namespace OpenDiablo2 { namespace OS {
 
 class D2Window {
 public:
 	D2Window();
-	void Run();
+	void Initialize();
+	void Finalize();
+	bool WindowStillOpen();
+	void FlipBuffer();
+	void PollEvents();
 private:
 	GLFWwindow* glfwWindow;
-
-	void
-	InitializeWindow();
-
-	void
-	FinalizeWindow();
 };
 
 typedef std::unique_ptr<D2Window> D2WindowPtr;

OpenDiablo2.OS/src/D2Window.cpp

@@ -1,37 +1,52 @@
-#include <D2Window.h>
-#define GLFW_INCLUDE_NONE
+#include <OpenDiablo2.OS/D2Window.h>
+#include <spdlog/spdlog.h>
+#include <GLFW/glfw3.h>
 
 namespace OpenDiablo2 {
 	namespace OS {
 
-		D2Window::D2Window() {
-
-		}
+		D2Window::D2Window() = default;
 
 		void
-		D2Window::Run() {
-			InitializeWindow();
-			while (!glfwWindowShouldClose(glfwWindow)) {
-				glfwPollEvents();
-			}
-			FinalizeWindow();
-		}
+		D2Window::Initialize() {
+			spdlog::debug("Initializing D2Window");
 
-		void
-		D2Window::InitializeWindow() {
+			spdlog::debug("Initializing GLFW");
 			if (!glfwInit()) {
+				spdlog::error("Initializing D2Window");
 				throw std::runtime_error(
 					 "GLFW could not initialize the host window.");
 			}
 
+			spdlog::debug("Creating GLFW window");
 			glfwWindowHint(GLFW_RESIZABLE, 0);
-			glfwWindow = glfwCreateWindow(800, 600, "OpenDiablo 2", NULL, NULL);
+			glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+			glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+			glfwWindow = glfwCreateWindow(800, 600, "OpenDiablo 2", nullptr, nullptr);
 		}
 
 		void
-		D2Window::FinalizeWindow() {
+		D2Window::Finalize() {
+			spdlog::debug("Destroying GLFW window");
 			glfwDestroyWindow(glfwWindow);
+
+			spdlog::debug("Terminating GLFW");
 			glfwTerminate();
 		}
+
+		bool
+		D2Window::WindowStillOpen() {
+			return !glfwWindowShouldClose(glfwWindow);
+		}
+
+		void
+		D2Window::PollEvents() {
+			glfwPollEvents();
+		}
+
+		void
+		D2Window::FlipBuffer() {
+			glfwSwapBuffers(glfwWindow);
+		}
 	}
 }