(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.
context
A 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)
}