Function main

example.cpp:24–169

#undef main

int main(int argc, char* argv[])
{
	bool run = true;
	srand(time(NULL));

	// init sdl2
	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_AUDIO) < 0) {
		printf("Failed to initialize SDL2\n");
		return 0;
	}

	SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
	Uint32 windowFlags = SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI;

	// create the window
	int wndWidth = 1200, wndHeight = 800;
	SDL_Window* wnd = SDL_CreateWindow("File Dialog", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, wndWidth, wndHeight, windowFlags);
	
	// create the GL context
	SDL_GLContext glContext = SDL_GL_CreateContext(wnd);
	SDL_GL_MakeCurrent(wnd, glContext);
	glEnable(GL_DEPTH_TEST);
	glEnable(GL_STENCIL_TEST);

	// init glew
	glewExperimental = true;
	if (glewInit() != GLEW_OK) {
		printf("Failed to initialize GLEW\n");
		return 0;
	}

	// imgui
	ImGui::CreateContext();
	ImGuiIO& io = ImGui::GetIO(); (void)io;
	ImGui::StyleColorsLight();

	ImGui_ImplSDL2_InitForOpenGL(wnd, glContext);
	ImGui_ImplOpenGL3_Init();

	// ImFileDialog requires you to set the CreateTexture and DeleteTexture
	ifd::FileDialog::Instance().CreateTexture = [](uint8_t* data, int w, int h, char fmt) -> void* {
		GLuint tex;

		glGenTextures(1, &tex);
		glBindTexture(GL_TEXTURE_2D, tex);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, (fmt == 0) ? GL_BGRA : GL_RGBA, GL_UNSIGNED_BYTE, data);
		glGenerateMipmap(GL_TEXTURE_2D);
		glBindTexture(GL_TEXTURE_2D, 0);

		return (void*)tex;
	};