Imagick
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Imagick::paintTransparentImage

(PECL imagick 2.0.0)

Imagick::paintTransparentImageChanges any pixel that matches color with the color defined by fill

说明

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

Changes any pixel that matches color with the color defined by fill.

参数

target

Change this target color to specified opacity value within the image.

alpha

The level of transparency: 1.0 is fully opaque and 0.0 is fully transparent.

fuzz

The fuzz member of image defines how much tolerance is acceptable to consider two colors as the same.

返回值

成功时返回 TRUE

错误/异常

错误时抛出 ImagickException。

更新日志

版本 说明
2.1.0 Now allows a string representing the color as the first parameter. Previous versions allow only an ImagickPixel object.


Imagick
PHP 手册