Added SDL

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "external/SDL"]
+	path = external/SDL
+	url = https://github.com/spurious/SDL-mirror

CMakeLists.txt

@@ -2,4 +2,5 @@ cmake_minimum_required(VERSION 3.10)
 
 project(FourierAnalyzer)
 
+add_subdirectory(external/SDL)
 add_subdirectory(src)

external/SDL

@@ -0,0 +1 @@
+Subproject commit f606beea77a0ebe9b98f2aa8341b76341982c41c

src/CMakeLists.txt

@@ -4,4 +4,16 @@ add_executable(fourier
 
 target_include_directories(fourier PRIVATE
 	${CMAKE_SOURCE_DIR}/include
-)
+	external/SDL/include
+)
+
+target_link_libraries(fourier PRIVATE
+	SDL2
+	SDL2main
+)
+
+if(WIN32)
+	add_custom_command(TARGET fourier POST_BUILD
+		COMMAND ${CMAKE_COMMAND} -E copy $<TARGET_FILE:SDL2> $<TARGET_FILE_DIR:fourier>
+	)
+endif()

src/main.cpp

@@ -1,8 +1,40 @@
 #include <iostream>
+#include <SDL.h>
 
 int main(int argc, char** argv)
 {
-	std::cout << "Hello, World!" << std::endl;
+	SDL_Window* window;
+	SDL_Renderer* renderer;
+	
+	if (SDL_CreateWindowAndRenderer(800, 800, SDL_WINDOW_SHOWN, &window, &renderer))
+	{
+		std::cerr << "Failed to initialize Window and Renderer" << std::endl;
+		return -1;
+	}
+
+	SDL_Event event;
+	bool isOpen = true;
+	while (isOpen)
+	{
+		while (SDL_PollEvent(&event))
+		{
+			if (event.type == SDL_WINDOWEVENT)
+			{
+				switch (event.window.event)
+				{
+				case SDL_WINDOWEVENT_CLOSE: isOpen = false; break;
+				}
+			}
+		}
+
+		SDL_SetRenderDrawColor(renderer, 20, 40, 210, 255);
+		SDL_RenderClear(renderer);
+
+		SDL_RenderPresent(renderer);
+	}
+	
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(window);
 
 	return 0;
 }