Gmagick::setimagechanneldepth()
(PECL gmagick >= Unknown)
Sets the depth of a particular image channel
说明
public Gmagick::setimagechanneldepth(int $channel,int $depth): Gmagick
Sets the depth of a particular image channel.
参数
- $channel
Identify which channel to extract: RedChannel, GreenChannel, BlueChannel, OpacityChannel, CyanChannel, MagentaChannel, YellowChannel, BlackChannel.
- $depth
The image depth in bits.
返回值
The Gmagick object on success
错误／异常
错误时抛出GmagickException。