struct pix_context_t
{
    /* Destination */
    pixman_format_code_t	dst_format;
    int				dst_width;
    int				dst_height;
    int				dst_stride;
    uint32_t *			dst_bits;

    /* Src */
    pix_image_t *		src;

    /* Mask */
    pix_image_t *		mask;
};