This operation computes the component-wise sum, subtraction, or
multiplication (also called"modulation") of two colors and assigns it to
the left operand.
Components that exceed 255 are clamped to 255 and those below 0 are
clamped to 0. For multiplication, are divided
by 255 so that the result is still in the range [0, 255].
Overlolad of the +=, -=, and *=` operators.
This operation computes the component-wise sum, subtraction, or multiplication (also called"modulation") of two colors and assigns it to the left operand. Components that exceed 255 are clamped to 255 and those below 0 are clamped to 0. For multiplication, are divided by 255 so that the result is still in the range [0, 255].