- PHP 手册
- 函数参考
- 图像生成和处理
- Cairo
- CairoContext
CairoContext::getCurrentPoint
cairo_get_current_point
(PECL cairo >= 0.1.0)
CairoContext::getCurrentPoint -- cairo_get_current_point — The getCurrentPoint purpose
说明
面向对象风格
public CairoContext::getCurrentPoint ( void ) : array过程化风格
cairo_get_current_point ( CairoContext$context
) : array
Gets the current point of the current path, which is conceptually the final point reached by the path so far.
The current point is returned in the user-space coordinate system. If there is no defined current point or if cr is in an error status, x and y will both be set to 0.0. It is possible to check this in advance with CairoContext::hasCurrentPoint().
Most path construction functions alter the current point. See the following for details on how they affect the current point: CairoContext::newPath(), CairoContext::newSubPath(), CairoContext::appendPath(), CairoContext::closePath(), CairoContext::moveTo(), CairoContext::lineTo(), CairoContext::curveTo(), CairoContext::relMoveTo(), CairoContext::relLineTo(), CairoContext::relCurveTo(), CairoContext::arc(), CairoContext::arcNegative(), CairoContext::rectangle(), CairoContext::textPath(), CairoContext::glyphPath().
Some functions use and alter the current point but do not otherwise change current path: CairoContext::showText().
Some functions unset the current path and as a result, current point: CairoContext::fill(), CairoContext::stroke().
参数
-
context -
A valid CairoContext object.
返回值
An array containing the x (index 0) and y (index 1) coordinates of the current point.
范例
Example #1 面向对象风格
<?php
$s = new CairoImageSurface(CairoFormat::ARGB32, 100, 100);
$c = new CairoContext($s);
$c->moveTo(10, 10);
var_dump($c->getCurrentPoint());
?>
以上例程的输出类似于：
array(2) {
[0]=>
float(10)
[1]=>
float(10)
}
Example #2 过程化风格
<?php
$s = cairo_image_surface_create(CAIRO_SURFACE_TYPE_IMAGE, 100, 100);
$c = cairo_create($s);
cairo_move_to($c, 10, 10);
var_dump(cairo_get_current_point($c));
?>
以上例程的输出类似于：
array(2) {
[0]=>
float(10)
[1]=>
float(10)
}
参见
- CairoContext::moveTo() - The moveTo purpose
- CairoContext::hasCurrentPoint() - The hasCurrentPoint purpose
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/cairocontext.getcurrentpoint.php