(PECL gmagick >= Unknown)
Gmagick::newimage — Creates a new image
$width
, int $height
, string $background
[, string $format
] )Creates a new image with the specified background color
widthWidth of the new image
heightHeight of the new image
backgroundThe background color used for this image (as float)
formatImage format.
The Gmagick object on success
错误时抛出 GmagickException。