(PECL imagick 2, PECL imagick 3)
Imagick::colorizeImage — 將填滿顏色與影像混合
將填滿顏色與影像中的每個像素混合。
colorizeImagickPixel 物件或包含色彩化色彩的字串
opacityImagickPixel 物件或包含不透明度值的浮點數。 1.0 為完全不透明，0.0 為完全透明。
成功時回傳 true。
發生錯誤時拋出 ImagickException。
| 版本 | 描述 |
|---|---|
| PECL imagick 2.1.0 | 現在允許以字串表示色彩作為第一個參數，並以浮點數表示不透明度值作為第二個參數。先前的版本僅允許 ImagickPixel 物件。 |
範例 1 Imagick::colorizeImage()
<?php
function colorizeImage($imagePath, $color, $opacity) {
$imagick = new \Imagick(realpath($imagePath));
$opacity = $opacity / 255.0;
$opacityColor = new \ImagickPixel("rgba(0, 0, 0, $opacity)");
$imagick->colorizeImage($color, $opacityColor);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>如果您正在尋找用純色填滿影像並保留背景透明度的解決方案，以下是一種方法
<?php
$im = new Imagick('image.png');
$im->setImageAlphaChannel(Imagick::ALPHACHANNEL_EXTRACT);
$im->setImageBackgroundColor('color');
$im->setImageAlphaChannel(Imagick::ALPHACHANNEL_SHAPE);
$im->writeImage('output.png');
$im->destroy();
?>為了改進「php at lfbittencourt dot com」的解決方案，這個解決方案會混合合成的顏色，並將不透明度納入考量。
<?php
class YourImagick extends Imagick
{
public function colorize($color, $alpha = 1, $composite_flag = Imagick::COMPOSITE_COLORIZE)
{
$draw = new ImagickDraw();
$draw->setFillColor($color);
$geometry = $this->getImageGeometry();
$width = $geometry['width'];
$height = $geometry['height'];
$draw->rectangle(0, 0, $width, $height);
$temporary = new Imagick();
$temporary->setBackgroundColor(new ImagickPixel('transparent'));
$temporary->newImage($width, $height, new ImagickPixel('transparent'));
$temporary->setImageFormat('png32');
$temporary->drawImage($draw);
$alphaChannel = $this->clone();
$alphaChannel->setImageAlphaChannel(Imagick::ALPHACHANNEL_EXTRACT);
$alphaChannel->negateImage(false, Imagick::CHANNEL_ALL);
$this->setImageClipMask($alphaChannel);
$clone = $this->clone();
$clone->compositeImage($temporary, $composite_flag, 0, 0);
$clone->setImageOpacity($alpha);
$this->compositeImage($clone, Imagick::COMPOSITE_DEFAULT, 0, 0);
}
}
?>您是否想要具有真實不透明度控制的色彩覆蓋？試試這個
<?php
class YourImagick extends Imagick
{
public function colorize($color, $alpha = 1)
{
$draw = new ImagickDraw();
$draw->setFillColor($color);
if (is_float($alpha)) {
$draw->setFillAlpha($alpha);
}
$geometry = $this->getImageGeometry();
$width = $geometry['width'];
$height = $geometry['height'];
$draw->rectangle(0, 0, $width, $height);
$this->drawImage($draw);
}
}
?>
如何使用
<?php
$imagick = new YourImagick('example.png');
$imagick->colorize('#ffcc00', 0.35);
header('Content-type: image/png');
echo $source;
?>「olav at redwall dot ee」發布的解決方案會在每個非透明形狀的外部添加黑色邊框。
這是我的改進版本
<?php
public function colorize($color, $alpha = 1)
{
$geometry = $this->getImageGeometry();
$width = $geometry['width'];
$height = $geometry['height'];
$draw = new ImagickDraw;
$draw->setFillColor($color);
$draw->rectangle(0, 0, $width, $height);
$temporary = new Imagick;
$temporary->setBackgroundColor(new ImagickPixel('transparent'));
$temporary->newImage($width, $height, new ImagickPixel('transparent'));
$temporary->setImageFormat('png32');
$temporary->drawImage($draw);
$temporary->compositeImage($this, Imagick::COMPOSITE_COPYOPACITY, 0, 0);
$this->setImageArtifact('compose:args', ($alpha * 100) . '%,100%');
$this->compositeImage($temporary, Imagick::COMPOSITE_DISSOLVE, 0, 0);
}
?>最簡單的範例
<?php
$nombre = '001-4-0043.jpg';
$img = new Imagick($nombre);
$img->negateImage(false);
//$pixblu = new ImagickPixel('#000040');
$img->colorizeImage('#0000b0',1.0);
header('content-type: image/jpeg');
echo $img;
?>