Question

I want to make an area transparent within an Imagick object with a specific width, height and a top position.

For example I need a transparent area with 30px x 30px from the 15th px to the top but I can’t find a way to do it.

$canvas1 = new Imagick();

$canvas1->newImage(30,60,'black','png');

Please help.

Answer 1

You can set the opacity as follows

$image->setImageOpacity(0.0);

If you set it to 0.0 the image what you have crated will become transparent

for more information you can Set opacity in Imagick

if you want it for a particular area part then you need to change the approach by using GD library functions by doing some what like this

 $img = imagecreatefrompng($imgPath); // load the image
 list($width,$height) = getimagesize($imgPath); // get its size
 $c = imagecolortransparent($img,imagecolorallocate($img,255,1,254)); // create      transparent color, (255,1,254) is a color that won't likely occur in your image
 $border = 10;
 imagefilledrectangle($img, $border, $border, $width-$border, $height-$border, $c); // draw transparent box
 imagepng($img,'after.png'); // save

I Could see a similar requirement which is posted in another forum here