Issue
I've tried to translate it, but doesn't work, doesn't anyone know what the wrong is ?
ImageMagick
convert source.jpg \( -size 640x480 xc:white -size 200x200
xc:black -geometry +200+100 -compose over -composite \)
+geometry -alpha off -compose copy_opacity -composite result.png
PHP code with Imagick I tried, but didn't work:
//Open your image and get its dimensions
$image = new Imagick('source.png');
$height = $image->getImageHeight();
$width = $image->getImageWidth();
//Create a new transparent image of the same size
$mask = new Imagick();
$mask->newImage($width, $height, new ImagickPixel('white'));
//Draw onto the new image the areas you want to be transparent in the original
$draw = new ImagickDraw();
$draw->setFillColor('black');
$draw->rectangle($x, $y, $x + 200, $y + 200);
$mask->drawImage( $draw );
//Composite the images
$image->compositeImage($mask, Imagick::COMPOSITE_COPYOPACITY, 0, 0, Imagick::CHANNEL_ALPHA);
$image->setImageFormat('png');
$image->writeImage("~/images/result.png");
Original Question:
How to make specified area of an image transparent with Imagick?
Another trying
$width = 256;
$height = 256;
$x = 50;
$y = 100;
$fooWidth = 100;
$fooHeight = 60;
$image = new Imagick();
$image->newImage($width, $height, new ImagickPixel('yellow'));
//Create a new transparent image of the same size
$mask = new Imagick();
$mask->newImage($width, $height, new ImagickPixel('white'));
$mask->setImageFormat('png');
//Draw onto the new image the areas you want to be transparent in the original
$draw = new ImagickDraw();
$draw->setFillColor('black');
$draw->rectangle($x, $y, $x + $fooWidth, $y + $fooHeight);
$mask->drawImage($draw);
//Composite the images
$image->compositeImage($mask, Imagick::COMPOSITE_COPYOPACITY, 0, 0);
$image->setImageFormat('png');
$image->writeImage($path);
COMPOSITE_COPYOPACITY
looks doesn't work:
Solution
try turning alpha off at the end when you create the mask. This works fine for me:
convert -size 500x500 xc:yellow \( -size 500x500 xc:white -fill black -draw "rectangle 100,100 300,300" -alpha off \) -compose copy_opacity -composite result.png
See http://us3.php.net/manual/en/imagick.setimagematte.php where the example adds
$mask->setImageMatte(false);
After the draw command and before the compositeImage() command
Answered By - fmw42 Answer Checked By - Gilberto Lyons (PHPFixing Admin)
0 Comments:
Post a Comment
Note: Only a member of this blog may post a comment.