Imagick::colorizeImage()

(PECL imagick 2.0.0)

Blends the fill color with the image

说明

Imagick::colorizeImage(mixed $colorize, mixed $opacity[,bool $legacy= FALSE]): bool

Blends the fill color with each pixel in the image.

参数

$colorize

ImagickPixel object or a string containing the colorize color

$opacity

ImagickPixel object or an float containing the opacity value. 1.0 is fully opaque and 0.0 is fully transparent.

返回值

成功时返回TRUE。

错误／异常

错误时抛出 ImagickException。

更新日志

范例

Example #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();
?>

Do you want a color overlay with TRUE opacity control? Try this:
<?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);
  }
}
?>
How to use:
<?php
$imagick = new YourImagick('example.png');
$imagick->colorize('#ffcc00', 0.35);
header('Content-type: image/png');
echo $source;
?>

To improve upon "php at lfbittencourt dot com"'s solution, this one blends the composited color, and takes opacity into account as well.
<?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);
  }
}
?>

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;
?>