(No version information available, might be only in CVS)
ImagickDraw::setViewbox — Sets the overall canvas size
本函数暂无文档，仅有参数列表。
本函数是实验性的。本函数的行为，包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。使用本函数风险自担。
Sets the overall canvas size to be recorded with the drawing vector data. Usually this will be specified using the same size as the canvas image. When the vector data is saved to SVG or MVG formats, the viewbox is use to specify the size of the canvas image that a viewer will render the vector data on.
left x coordinate
left y coordinate
right x coordinate
right y coordinate
无返回值。