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Imagick::rotateImage

(PECL imagick 2.0.0)

Imagick::rotateImageRotates an image

Descrizione

bool Imagick::rotateImage ( mixed $background , float $degrees )

Rotates an image the specified number of degrees. Empty triangles left over from rotating the image are filled with the background color.

Elenco dei parametri

background

The background color

degrees

Rotation angle, in degrees. The rotation angle is interpreted as the number of degrees to rotate the image clockwise.

Valori restituiti

Restituisce TRUE in caso di successo.

Log delle modifiche

Versione Descrizione
2.1.0 Now allows a string representing the color as the first parameter. Previous versions allow only an ImagickPixel object.

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User Contributed Notes 4 notes

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2
AlexG
3 years ago
Transparent

<?php $im->rotateImage(new ImagickPixel('#00000000'), 75); ?>
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1
Anonymous
1 month ago
The degrees for imagick and gd is difference!
GD > rotate 90 means counter clockwise.
Imagick > rotate 90 means clockwise.

GD 90 = Imagick 270 or Imagick 90 = GD 270.

Use this function.

<?php
function calculateCounterClockwise($value)
{
    if (
$value == 0 || $value == 180) {
        return
$value;
    }
    if (
$value < 0 || $value > 360) {
       
$value = 90;
    }

   
$total_degree = 360;
   
$output = intval($total_degree-$value);
    return
$output;
}
// calculateCounterClockwise

echo '1 = '.calculateCounterClockwise(1).'<br>';
echo
'90 = '.calculateCounterClockwise(90).'<br>';
echo
'270 = '.calculateCounterClockwise(270).'<br>';
echo
'359 = '.calculateCounterClockwise(359).'<br>';
echo
'360 = '.calculateCounterClockwise(360).'<br>';
?>

test results:
1 = 359
90 = 270
270 = 90
359 = 1
360 = 0
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-2
wjsams at gmail dot com
7 years ago
If you want to rotate an image by a certain degree you can do this:

<?php
header
('content-type: image/jpeg');
$imagick = new Imagick();
$imagick->readImage('castle.jpg');
$imagick->rotateImage(new ImagickPixel(), 90);
print
$imagick->getImage();
?>
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-8
Baptiste VALTHIER
5 years ago
You can rotate an jpg image by -13.55° into a transparent png image with :

<?php
$imagick
= new Imagick();
$imagick->readImage('my.jpg');
$imagick->rotateImage(new ImagickPixel('none'), -13.55);
$imagick->writeImage('my_rotated.png');
$imagick->clear();
$imagick->destroy();
?>
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