(No version information available, might only be in SVN)
Imagick::setImageAlphaChannel — Sets image alpha channel
$mode
)
Activate or deactivate image alpha channel. The mode
is one of the Imagick::ALPHACHANNEL_* constants.
此方法在Imagick基于ImageMagick 6.3.8以上版本编译时可用。
mode
One of the Imagick::ALPHACHANNEL_* constants
成功时返回 TRUE .
错误时抛出 ImagickException .