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(PECL gmagick >= Unknown)
Gmagick::setimageunits — Sets the image units of resolution.
$resolution
)Sets the image units of resolution.
resolution
The image units of resolution : Undefinedresolution, PixelsPerInchResolution, or PixelsPerCentimeterResolution.
The Gmagick object on success.
错误时抛出 GmagickException。