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Imagick::setImageAlphaChannel

(No version information available, might only be in Git)

Imagick::setImageAlphaChannelSets image alpha channel

Descrição

Imagick::setImageAlphaChannel ( int $mode ) : bool

Activate or deactivate image alpha channel. The mode is one of the Imagick::ALPHACHANNEL_* constants. Este método está disponível se o PHP foi compilado com o ImageMagick versão 6.3.8 ou superior.

Parâmetros

mode

One of the Imagick::ALPHACHANNEL_* constants

Valor Retornado

Retorna TRUE no sucesso.

Erros

Lança ImagickException em caso de erro.

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simonjjarrett at gmail dot com
6 months ago
If you're having trouble with white backgrounds turning black when converting PDFs to other formats, you need to use this function with Imagick::ALPHACHANNEL_REMOVE as the parameter (this is not currently on the constants page, but it exists in PHP 7.2) to remove the alpha channel.

<?php
$im
->setImageAlphaChannel(Imagick::ALPHACHANNEL_REMOVE );
?>
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