CairoContext::hasCurrentPoint
cairo_has_current_point
(PECL cairo >= 0.1.0)
CairoContext::hasCurrentPoint -- cairo_has_current_point — The hasCurrentPoint purpose
说明
面向对象风格 (method):
public CairoContext::hasCurrentPoint
( void
) : bool
过程化风格:
Returns whether a current point is defined on the current path. See CairoContext::getCurrentPoint() for details on the current point.
返回值
Whether a current point is defined
范例
Example #1 面向对象风格
<?php
$s = new CairoImageSurface(CairoFormat::ARGB32, 100, 100);
$c = new CairoContext($s);
var_dump($c->hasCurrentPoint());
$c->moveTo(10, 10);
var_dump($c->hasCurrentPoint());
?>
以上例程会输出：
bool(false) bool(true)
Example #2 过程化风格
<?php
$s = cairo_image_surface_create(CAIRO_SURFACE_TYPE_IMAGE, 100, 100);
$c = cairo_create($s);
var_dump(cairo_has_current_point($c));
cairo_move_to($c, 10, 10);
var_dump(cairo_has_current_point($c));
?>
以上例程会输出：
bool(false) bool(true)