(PECL gmagick >= Unknown)
Gmagick::getimagechanneldepth — Gets the depth for a particular image channel
$channel_type
) : intGets the depth for a particular image channel.
锟剿猴拷锟斤拷没锟叫诧拷锟斤拷锟斤拷
Depth of image channel
锟斤拷锟斤拷时锟阶筹拷 GmagickException锟斤拷