(PECL gmagick >= Unknown)
Gmagick::setsize — Sets the size of the Gmagick object
Sets the size of the Gmagick object. Set it before you read a raw image format such as Gmagick::COLORSPACE_RGB,
Gmagick::COLORSPACE_GRAY, or Gmagick::COLORSPACE_CMYK.
columnsThe width in pixels.
rowsThe height in pixels.
The Gmagick object.
錯誤時(shí)拋出 GmagickException。