(PECL imagick 2, PECL imagick 3)
Imagick::colorizeImage — 塗りつぶし色と画像を混合する
画像の各ピクセルに、塗りつぶし色を混合します。
colorize色を表す ImagickPixel オブジェクトあるいは文字列。
opacity不透明度を表す ImagickPixel オブジェクトあるいは文字列。 1.0 は完全に不透明、0.0 は完全に透明であることを表します。
成功した場合に true を返します。
エラー時に ImagickException をスローします。
| バージョン | 説明 |
|---|---|
| PECL imagick 2.1.0 | 色を表す文字列を最初のパラメータとして、 不透明度を表す浮動小数点数値を 2 番目のパラメータとして指定できるようになりました。 これまでのバージョンでは ImagickPixel オブジェクトしか指定できませんでした。 |
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 $imagick->getImageBlob();
}
?>If you're looking for a solution to fill the image with a solid color, preserving background transparency, here is one way:<?php$im = new Imagick('image.png');$im->setImageAlphaChannel(Imagick::ALPHACHANNEL_EXTRACT);$im->setImageBackgroundColor('color');$im->setImageAlphaChannel(Imagick::ALPHACHANNEL_SHAPE);$im->writeImage('output.png');$im->destroy();?>To improve upon "php at lfbittencourt dot com"'s solution, this one blends the composited color, and takes opacity into account as well.<?phpclass YourImagick extends Imagick{ public function colorize($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); }}?>Do you want a color overlay with TRUE opacity control? Try this:<?phpclass 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); }}?>How to use:<?php$imagick = new YourImagick('example.png');$imagick->colorize('#ffcc00', 0.35);header('Content-type: image/png');echo $source;?>The solution published by "olav at redwall dot ee " was adding a black surround outside each non-transparent shape.Here is my improved version :<?phppublic function colorize($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);}?>When you're using an image with an alpha channel (for example a transparent png), a value of 1.0 will return a completely transparent image, but a value of 1 works just fine.simplest example<?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;?>