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  • Imagick::transparentPaintImage()

    (No version information available, might only be in Git)

    Paints pixels transparent

    说明

    Imagick::transparentPaintImage(mixed $target,float $alpha,float $fuzz,bool $invert): bool

    Paints pixels matching the target color transparent.此方法在Imagick基于ImageMagick 6.3.8以上版本编译时可用。

    参数

    $target

    The target color to paint

    $alpha

    透明级别:1.0 是完全不透明,0.0 是完全透明。

    $fuzz

    The amount of fuzz. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color.

    $invert

    If TRUE paints any pixel that does not match the target color.

    返回值

    成功时返回TRUE

    范例

    Example #1 Imagick::transparentPaintImage()

    <?php
    function transparentPaintImage($color, $alpha, $fuzz) {
        $imagick = new \Imagick(realpath("images/BlueScreen.jpg"));
        //Need to be in a format that supports transparency
        $imagick->setimageformat('png');
        $imagick->transparentPaintImage(
            $color, $alpha, $fuzz * \Imagick::getQuantum(), false
        );
        //Not required, but helps tidy up left over pixels
        $imagick->despeckleimage();
        header("Content-Type: image/png");
        echo $imagick->getImageBlob();
    }
    ?>