Method initialize

keyboard/src/graphics.cpp:124–223

}

int window::initialize(int windowWidth, int windowHeight, bool fullScreen){
	this->windowWidth = windowWidth;
	this->windowHeight = windowHeight;
	//init SDL
	SDL_Init(SDL_INIT_VIDEO);
	//init window var
	window = NULL;
	//create OpenGL context
	glContext = NULL;

	shader = new shader_h();

	//request OpenGL ES 3.0
	SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);

	//force usage of GLES backend
	SDL_SetHint(SDL_HINT_OPENGL_ES_DRIVER, "1");

	//double buffering
	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);

	//create window
	int fullscreenVal = SDL_WINDOW_FULLSCREEN;
	if (!fullScreen){
		fullscreenVal = 0;
	}
	
	window = SDL_CreateWindow("Keyboard", SDL_WINDOWPOS_CENTERED, 
			SDL_WINDOWPOS_CENTERED, windowWidth, windowHeight, SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN | fullscreenVal);
	//disable mouse
	SDL_ShowCursor(SDL_DISABLE);
	
	//create context
	glContext = SDL_GL_CreateContext(window);


	//load the texture shader program
	textureShaderProgram = loadShaderProgram("src/shaders/texture.vert", "src/shaders/texture.frag");
	if (!textureShaderProgram){
		return -1;
	}
	//load the color shader program
	colorShaderProgram = loadShaderProgram("src/shaders/colorShape.vert", "src/shaders/colorShape.frag");
	if (!colorShaderProgram){
		return -1;
	}
	//load the text shader program
	textShaderProgram = loadShaderProgram("src/shaders/text.vert", "src/shaders/text.frag");
	if (!textShaderProgram){
		return -1;
	}

	//GLint textureSamplerUniformLocation to set which texture unit to use later
	textureSamplerUniformLocation = glGetUniformLocation(textureShaderProgram, "textureSampler");
	if (textureSamplerUniformLocation < 0){
		SDL_Log("Could not get textureSampler's location");