(PECL imagick 2.0.0)

Imagick::setImageMatteSets the image matte channel


bool Imagick::setImageMatte ( bool $matte )

Sets the image matte channel. Этот метод доступен, если Imagick был скомпилирован с версией ImageMagick 6.2.9 или старше.

Список параметров


True activates the matte channel and false disables it.

Возвращаемые значения

В случае успешной работы возвращает TRUE.

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User Contributed Notes 1 note

martin at psinas dot com
6 years ago
I found this method is needed when creating a font / image mask, and needs to be set to false otherwise the mask won't take effect. Here is an example:


// Create objects
$image = new Imagick('myImage.png');
$watermark = new Imagick();
$mask = new Imagick();
$draw = new ImagickDraw();

// Define dimensions
$width = $image->getImageWidth();
$height = $image->getImageHeight();

// Create some palettes
$watermark->newImage($width, $height, new ImagickPixel('grey30'));
$mask->newImage($width, $height, new ImagickPixel('black'));

// Watermark text
$text = 'Copyright';

// Set font properties

// Position text

// Draw text on the watermark palette
$watermark->annotateImage($draw, 10, 12, 0, $text);

// Draw text on the mask palette
$mask->annotateImage($draw, 11, 13, 0, $text);
$mask->annotateImage($draw, 10, 12, 0, $text);
$mask->annotateImage($draw, 9, 11, 0, $text);

// This is apparently needed for the mask to work

// Apply mask to watermark
$watermark->compositeImage($mask, Imagick::COMPOSITE_COPYOPACITY, 0, 0);

// Overlay watermark on image
$image->compositeImage($watermark, Imagick::COMPOSITE_DISSOLVE, 0, 0);

// Set output image format

// Output the new image
header('Content-type: image/png');

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