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 bool CairoContext::hasCurrentPoint ( void )

过程化风格:

bool cairo_has_current_point ( CairoContext $context )

Returns whether a current point is defined on the current path. See CairoContext::getCurrentPoint() for details on the current point.

参数

context: A valid CairoContext object.

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)

参见

CairoContext::getCurrentPoint() - The getCurrentPoint purpose