(PECL cairo >= 0.1.0)
CairoContext::clipExtents -- cairo_clip_extents — Computes the area inside the current clip
面向对象风格 (method):
过程化风格:
Computes a bounding box in user coordinates covering the area inside the current clip.
contextA valid CairoContext object
An array containing the (float)x1, (float)y1, (float)x2, (float)y2, coordinates covering the area inside the current clip
Example #1 面向对象风格
<?php
$surface = new CairoImageSurface(CairoFormat::ARGB32, 50, 50);
$context = new CairoContext($surface);
var_dump($context->clipExtents());
?>
以上例程的输出类似于：
array(4) {
[0]=>
float(0)
[1]=>
float(0)
[2]=>
float(50)
[3]=>
float(50)
}
Example #2 过程化风格
<?php
$surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 50, 50);
$context = cairo_create($surface);
var_dump(cairo_clip_extents($context));
?>
以上例程的输出类似于：
array(4) {
[0]=>
float(0)
[1]=>
float(0)
[2]=>
float(50)
[3]=>
float(50)
}