LBR04PacketRGB    413 coders/png.c           LBR04PacketRGB((pixelpacket)); \
LBR04PacketRGB   8926 coders/png.c           LBR04PacketRGB(image->background_color);
LBR04PacketRGB   8963 coders/png.c               LBR04PacketRGB(image->colormap[i]);