Gmagick::modulateimage()
(PECL gmagick >= Unknown)
Control the brightness, saturation, and hue
说明
public Gmagick::modulateimage(float $brightness,float $saturation,float $hue): Gmagick
Lets you control the brightness, saturation, and hue of an image. Hue is the percentage of absolute rotation from the current position. For example 50 results in a counter-clockwise rotation of 90 degrees, 150 results in a clockwise rotation of 90 degrees, with 0 and 200 both resulting in a rotation of 180 degrees.
参数
- $brightness
The percent change in brighness(-100 thru +100).
- $saturation
The percent change in saturation(-100 thru +100)
- $hue
The percent change in hue(-100 thru +100)
返回值
The Gmagick object on success
错误/异常
错误时抛出GmagickException。