CairoContext::clipExtents

cairo_clip_extents

(PECL cairo >= 0.1.0)

CairoContext::clipExtents -- cairo_clip_extentsComputes the area inside the current clip

说明

面向对象风格 (method):

public CairoContext::clipExtents ( void ) : array

过程化风格:

cairo_clip_extents ( CairoContext $context ) : array

Computes a bounding box in user coordinates covering the area inside the current clip.

参数

context

A valid CairoContext object

返回值

An array containing the (float)x1, (float)y1, (float)x2, (float)y2, coordinates covering the area inside the current clip

范例

Example #1 面向对象风格

<?php

$surface 
= new CairoImageSurface(CairoFormat::ARGB325050);

$context = new CairoContext($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_ARGB325050);

$context cairo_create($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)
}

参见