void CopyPBufferToImage(int width, int height)
{
	// Copy the contents of the framebuffer - which in our case is our pixel buffer -
	// to our bitmap image (dummy target) in local system memory. Notice that we also need
	// to invert the pbuffer's pixel data since OpenGL by default orients the
	// bitmap image bottom up. Our Windows DIB wrapper expects images to be
	// top down in orientation.

	static BYTE *pixels = new BYTE[width * height * 4];
	memset(pixels, 0, width * height * 4);

	glPixelStorei(GL_PACK_ALIGNMENT, 1);
	glReadPixels(0, 0, width, height, GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);

	for (int i = 0; i < height; ++i)
	{
		memcpy(&m_img.pPixels[m_img.pitch * i],
			&pixels[((height - 1) - i) * (width * 4)],
			width * 4);
	}
}