Must be set after setStrokeColor().
Values between 0 (invisible) and 1.
(PECL imagick 2, PECL imagick 3)
ImagickDraw::setStrokeAlpha — Specifies the opacity of stroked object outlines
本函数还未编写文档，仅有参数列表。
Specifies the opacity of stroked object outlines.
opacityopacity
没有返回值。
示例 #1 ImagickDraw::setStrokeAlpha() example
<?php
function setStrokeAlpha($strokeColor, $fillColor, $backgroundColor) {
$draw = new \ImagickDraw();
$draw->setStrokeColor($strokeColor);
$draw->setFillColor($fillColor);
$draw->setStrokeWidth(4);
$draw->line(100, 100, 400, 145);
$draw->rectangle(100, 200, 225, 350);
$draw->setStrokeOpacity(0.1);
$draw->line(100, 120, 400, 165);
$draw->rectangle(275, 200, 400, 350);
$image = new \Imagick();
$image->newImage(500, 400, $backgroundColor);
$image->setImageFormat("png");
$image->drawImage($draw);
header("Content-Type: image/png");
echo $image->getImageBlob();
}
?>