array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'zh', ), 'this' => array ( 0 => 'imagickdraw.setfillalpha.php', 1 => 'ImagickDraw::setFillAlpha', 2 => 'Sets the opacity to use when drawing using the fill color or fill texture', ), 'up' => array ( 0 => 'class.imagickdraw.php', 1 => 'ImagickDraw', ), 'prev' => array ( 0 => 'imagickdraw.setclipunits.php', 1 => 'ImagickDraw::setClipUnits', ), 'next' => array ( 0 => 'imagickdraw.setfillcolor.php', 1 => 'ImagickDraw::setFillColor', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/imagick/imagickdraw/setfillalpha.xml', ), 'history' => array ( ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); contributors($setup); ?>

ImagickDraw::setFillAlpha

(PECL imagick 2, PECL imagick 3)

ImagickDraw::setFillAlphaSets the opacity to use when drawing using the fill color or fill texture

说明

public function ImagickDraw::setFillAlpha(float $alpha): bool
警告

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.

参数

alpha

fill alpha

返回值

没有返回值。

示例

示例 #1 ImagickDraw::setFillAlpha() example

<?php
function setFillAlpha($strokeColor, $fillColor, $backgroundColor) {

    $draw = new \ImagickDraw();

    $draw->setStrokeColor($strokeColor);
    $draw->setFillColor($fillColor);
    $draw->setStrokeOpacity(1);
    $draw->setStrokeWidth(2);
    $draw->rectangle(100, 200, 200, 300);
    @$draw->setFillAlpha(0.4);
    $draw->rectangle(300, 200, 400, 300);

    $imagick = new \Imagick();
    $imagick->newImage(500, 500, $backgroundColor);
    $imagick->setImageFormat("png");
    $imagick->drawImage($draw);

    header("Content-Type: image/png");
    echo $imagick->getImageBlob();
}

?>