CairoContext::arcNegative
cairo_arc_negative
Adds a negative arc
Description
Object oriented style (method):
public void CairoContext::arcNegative
( float $x
, float $y
, float $radius
, float $angle1
, float $angle2
)
void cairo_arc_negative
( CairoContext $context
, float $x
, float $y
, float $radius
, float $angle1
, float $angle2
)
Parameters
-
context
-
A valid CairoContext object
-
x
-
double x position
-
y
-
double y position
-
radius
-
The radius of the desired negative arc
-
angle1
-
Start angle of the arc
-
angle2
-
End angle of the arc
Return Values
No value is returned.
Examples
Example #1 Object oriented style
<?php
$s = new CairoImageSurface(CairoFormat::ARGB32, 100, 100);
$c = new CairoContext($s);
$c->setSourceRgb(0, 0, 0);
$c->paint();
$c->setLineWidth(1);
$c->setSourceRgb(1, 1, 1);
for ($r = 50; $r > 0; $r -= 10) {
$c->arcNegative(50, 50, $r, 2 * M_PI, 0);
$c->stroke();
$c->fill();
}
$s->writeToPng(dirname(__FILE__) . '/CairoContext__arcNegative.png');
?>
Example #2 Procedural style
<?php
$s = cairo_image_surface_create(CAIRO_SURFACE_TYPE_IMAGE, 100, 100);
$c = cairo_create($s);
cairo_set_source_rgb($c, 0, 0, 0);
cairo_paint($c);
cairo_set_source_rgb($c, 1, 1, 1);
cairo_set_line_width($c, 1);
for ($r = 50; $r > 0; $r -= 10) {
cairo_arc_negative($c, 50, 50, $r, 2 * M_PI, 0);
cairo_stroke($c);
cairo_fill($c);
}
cairo_surface_write_to_png($s, dirname(__FILE__) . '/cairo_arc_negative.png');
?>