GLsizei width = 1, height = 1;
	uint8_t data[2] = {128,128};
	GLuint texture_name;

	glEnable(GL_TEXTURE_RECTANGLE_ARB);
	assert(glGetError() == GL_NO_ERROR);

	glGenTextures (1,&texture_name);
	assert(glGetError() == GL_NO_ERROR);

	glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texture_name);
	assert(glGetError() == GL_NO_ERROR);

	glTextureRangeAPPLE(GL_TEXTURE_RECTANGLE_ARB, width * height * 2, (void*)data);
	assert(glGetError() == GL_NO_ERROR);

	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_STORAGE_HINT_APPLE , GL_STORAGE_SHARED_APPLE);
	assert(glGetError() == GL_NO_ERROR);

	glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
	assert(glGetError() == GL_NO_ERROR);

// not sure about code above

	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	assert(glGetError() == GL_NO_ERROR);

	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	assert(glGetError() == GL_NO_ERROR);

	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
	assert(glGetError() == GL_NO_ERROR);

	glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
	assert(glGetError() == GL_NO_ERROR);

	glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
	assert(glGetError() == GL_NO_ERROR);

// end

	glViewport(0, 0,  width,height);
	assert(glGetError() == GL_NO_ERROR);

	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	assert(glGetError() == GL_NO_ERROR);

	glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGB, width, height, 0,
				 GL_YCBCR_422_APPLE,GL_UNSIGNED_SHORT_8_8_APPLE,
				 (void*)data);
	assert(glGetError() == GL_NO_ERROR);

	glTexSubImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, width, height,
					GL_YCBCR_422_APPLE,GL_UNSIGNED_SHORT_8_8_APPLE,
					(void*)data);
	assert(glGetError() == GL_NO_ERROR);