Lines Matching refs:bg
2619 /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
2621 # define png_composite(composite, fg, alpha, bg) \
2623 + (png_uint_16)(bg)*(png_uint_16)(255 - \
2627 # define png_composite_16(composite, fg, alpha, bg) \
2629 + (png_uint_32)(bg)*(png_uint_32)(65535L - \
2635 # define png_composite(composite, fg, alpha, bg) \
2637 (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
2640 # define png_composite_16(composite, fg, alpha, bg) \
2642 (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \
