// Rotates the hue of each pixel of the image. angle is a double in the range
// -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees
void RotateHue(double angle);
// Rotates the hue of each pixel of the image. angle is a double in the range
// -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees
void RotateHue(double angle);