void Window::Clear() {
	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
	glClear(GL_COLOR_BUFFER_BIT);
}

void Window::Update() {
	glFinish();
	SDL_GL_SwapWindow(m_window);
}

void Texture::Load(const std::string &filename) {
	m_surface = IMG_Load(filename.c_str());

	// Get texture height & width
	m_height = m_surface->h;
	m_width = m_surface->w;

	glGenTextures(1, &m_textureId);
	glBindTexture(GL_TEXTURE_2D, m_textureId);

	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

	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, m_surface->w, m_surface->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_surface->pixels);

	SDL_FreeSurface(m_surface);
}

void Texture::Draw(const float &x, const float &y, bool blend) {

	GLfloat vertexArray[] = { x, y, (float)m_width + x, y, (float)m_width + x, (float)m_height + y, x, (float)m_height + y };
	GLfloat textureVertexArray[] = {0, 1, 1, 1, 1, 0, 0, 0};

	glEnable(GL_TEXTURE_2D);

	glEnable(GL_BLEND);
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

	glEnableClientState(GL_VERTEX_ARRAY);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);

	glBindTexture(GL_TEXTURE_2D, m_textureId);

	glVertexPointer(2, GL_FLOAT, 0, vertexArray);
	glTexCoordPointer(2, GL_FLOAT, 0, textureVertexArray);

	glDrawArrays(GL_QUADS, 0, 4);

	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
	glDisableClientState(GL_VERTEX_ARRAY);

	glDisable(GL_BLEND);

	glDisable(GL_TEXTURE_2D);
}