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[PHP][Imagick] Conserve image transparency while masking

I work on imagick (PHP) and I want to apply a mask on an image. Basically, it works fine. But it doesn't work as expected when it has to deal with transparency on the main image. Let me explain it.

Source image (SD)

Source image

Mask Image (TPL)

Mask image

Result image :( (DEST)

Result image :(

Expected result

Expected result

As you can see on the images the transparency of the source is not on the result...

So, here is my code : 

$sd = 'tiger.png';
$tpl = 'tpl.png';
$dest = 'tiger_cut.png';

$base = new Imagick($sd);
$mask = new Imagick($tpl);

$base->compositeImage($mask, Imagick::COMPOSITE_COPYOPACITY, 0, 0, Imagick::CHANNEL_ALPHA);
$base->writeImage($dest);

I tried several options on compositeImage() but... couldn't find the right one(s).

Thanks in advance for your help :)

Solution

  • Here is the solution :

    $sd = 'tiger.png';
$tpl = 'tpl.png';
$dest = 'tiger_cut.png';

$base = new Imagick($sd);
$mask = new Imagick($tpl);

$base->compositeImage($mask, Imagick::COMPOSITE_DSTIN, 0, 0, Imagick::CHANNEL_ALPHA);
$base->writeImage($dest);