private fun load_from_pixels(pixels: Pointer, width, height: Int, format: GLPixelFormat)
	do
		var max_texture_size = glGetIntegerv(gl_MAX_TEXTURE_SIZE, 0)
		if width > max_texture_size then
			error = new Error("Texture width larger than gl_MAX_TEXTURE_SIZE ({max_texture_size}) in {self} at {width}")
			return
		else if height > max_texture_size then
			error = new Error("Texture height larger than gl_MAX_TEXTURE_SIZE ({max_texture_size}) in {self} at {height}")
			return
		end

		# Premultiply alpha?
		if premultiply_alpha and format == gl_RGBA then
			pixels.premultiply_alpha(width, height)
		end

		glPixelStorei(gl_UNPACK_ALIGNEMENT, 1)
		var tex = glGenTextures(1)[0]
		gl_texture = tex

		glBindTexture(gl_TEXTURE_2D, tex)
		glTexImage2D(gl_TEXTURE_2D, 0, format, width, height, 0, format, gl_UNSIGNED_BYTE, pixels)

		glHint(gl_GENERATE_MIPMAP_HINT, gl_NICEST)
		glGenerateMipmap(gl_TEXTURE_2D)
		glTexParameteri(gl_TEXTURE_2D, gl_TEXTURE_MIN_FILTER, gl_LINEAR_MIPMAP_LINEAR)

		glBindTexture(gl_TEXTURE_2D, 0)
	end