(PECL imagick 2.0.0)
ImagickDraw::setFillAlpha — Sets the opacity to use when drawing using the fill color or fill texture
$opacity
)本函数还未编写文档，仅有参数列表。
Sets the opacity to use when drawing using the fill color or fill texture. Fully opaque is 1.0.
opacity
fill alpha
没有返回值。