(PECL cairo >= 0.1.0)
CairoContext::arcNegative -- cairo_arc_negative — Adds a negative arc
Object oriented style (method):
Procedural style:
Adds a circular arc of the given radius to the current path. The arc is centered at (x , y ), begins at angle1 and proceeds in the direction of decreasing angles to end at angle2 . If angle2 is greater than angle1 it will be progressively decreased by 2*M_PI until it is less than angle1 . See CairoContext::arc or cairo_arc() for more details. This function differs only in the direction of the arc between the two angles.
A valid CairoContext object
double x position
double y position
The radius of the desired negative arc
Start angle of the arc
End angle of the arc
No value is returned.
Example #1 Object oriented style
<?php
// Creates the CairoSurface
$surface = new CairoImageSurface(CairoFormat::ARGB32, 50, 50);
// Get the cairo context
$context = new CairoContext($surface);
// Appends the arc
$context->arcNegative(0, 0, 1, 0, 2 * M_PI);
?>
Example #2 Procedural style
<?php
// Creates the CairoSurface
$surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 50, 50);
// Get the cairo context
$context = cairo_create($surface);
// Appends the arc
cairo_arc_negative($context, 0, 0, 1, 0, 2 * M_PI);
?>