Imagick::setInterlaceScheme
This function returns true on success but setting the iterator to an invalid index throws an exception instead of returning false:
Fatal error: Uncaught exception 'ImagickException' with message 'Unable to set iterator index'
This can happen when counting images inside a gif file, because the iterator count starts at zero and not one. If you count the number of images in a gif file be sure to use iterator 0 for the first image, like this:
<?php
$image = new Imagick('simple.gif');
$image->setIteratorIndex(0);
?>
Imagick::setIteratorIndex
(PECL imagick 2.0.0)
Imagick::setIteratorIndex — Set the iterator position
Descrição
bool Imagick::setIteratorIndex
( int $index
)
Set the iterator to the position in the image list specified with the index parameter. Este método esta disponível apenas se Imagick foi compilado com ImageMagick versão 6.2.9 ou mais nova.
Parâmetros
- index
-
The position to set the iterator to
Valor Retornado
Retorna TRUE em sucesso.
Exemplos
Exemplo #1 Using Imagick::setIteratorIndex():
Create images, set and get the iterator index
<?php
$im = new Imagick();
$im->newImage(100, 100, new ImagickPixel("red"));
$im->newImage(100, 100, new ImagickPixel("green"));
$im->newImage(100, 100, new ImagickPixel("blue"));
$im->setIteratorIndex(1);
echo $im->getIteratorIndex();
?>
Veja Também
- Imagick::getIteratorIndex() - Gets the index of the current active image
- Imagick::getImageIndex() - Gets the index of the current active image
- Imagick::setImageIndex() - Set the iterator position
User Contributed Notes
Imagick::setIteratorIndex
Imagick::setIteratorIndex
wilcobeekhuizen at gmail dot com
14-Mar-2011 07:06
14-Mar-2011 07:06