brightness_for
return brightness_for(color.red, color.green, color.blue);
if (brightness_for((r), (g), (b)) \
> brightness_for(_p.data8[2], _p.data8[1], _p.data8[0])) { \
if (brightness_for((r), (g), (b)) \
> brightness_for(_p.data8[2], _p.data8[1], _p.data8[0])) { \
if (brightness_for((r), (g), (b)) \
> brightness_for(_p.data8[2], _p.data8[1], _p.data8[0])) { \
if (brightness_for((r), (g), (b)) \
< brightness_for(_p.data8[2], _p.data8[1], _p.data8[0])) { \
if (brightness_for((r), (g), (b)) \
< brightness_for(_p.data8[2], _p.data8[1], _p.data8[0])) { \
if (brightness_for((r), (g), (b)) \
< brightness_for(_p.data8[2], _p.data8[1], _p.data8[0])) { \