Lines Matching refs:bg
2569 /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
2571 # define png_composite(composite, fg, alpha, bg) \
2574 + (png_uint_16)(bg)*(png_uint_16)(255 \
2578 # define png_composite_16(composite, fg, alpha, bg) \
2581 + (png_uint_32)(bg)*(65535 \
2587 # define png_composite(composite, fg, alpha, bg) \
2589 (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
2592 # define png_composite_16(composite, fg, alpha, bg) \
2594 (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \
