(PECL cairo >= 0.1.0)
CairoImageSurface::getFormat — Get the image format
Retrieves the image format, as one of the CairoFormat defined
此函数没有参数。
One of the CairoFormat enums
Example #1 CairoImageSurface::getFormat() example
<?php
$surface = new CairoImageSurface(CairoFormat::ARGB32, 50, 50);
var_dump($surface->getFormat()); // 0
$surface2 = new CairoImageSurface(CairoFormat::A8, 50, 50);
var_dump($surface2->getFormat()); // 2
?>
以上例程的输出类似于：
int(0) int(2)