CAIROFILLRULE(3) 1 CAIROFILLRULE(3)The CairoFillRule classINTRODUCTION
A CairoFillRule is used to select how paths are filled. For both fill rules, whether or not a point is included in the fill is determined
by taking a ray from that point to infinity and looking at intersections with the path. The ray can be in any direction, as long as it
doesn't pass through the end point of a segment or have a tricky intersection such as intersecting tangent to the path. (Note that filling
is not actually implemented in this way. This is just a description of the rule that is applied.)
The default fill rule is CairoFillRule::WINDING.
CLASS SYNOPSIS
CairoFillRule
CairoFillRule
Constants
o const integer$CairoFillRule::WINDING0
o const integer$CairoFillRule::EVEN_ODD1
PREDEFINED CONSTANTS
o CairoFillRule::WINDING -If the path crosses the ray from left-to-right, counts +1. If the path crosses the ray from right to left,
counts -1. (Left and right are determined from the perspective of looking along the ray from the starting point.) If the total
count is non-zero, the point will be filled.
o CairoFillRule::EVEN_ODD -Counts the total number of intersections, without regard to the orientation of the contour. If the total
number of intersections is odd, the point will be filled.
PHP Documentation Group CAIROFILLRULE(3)
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CAIRO_FILL(3) 1 CAIRO_FILL(3)CairoContext::fill - Fills the current path
Object oriented style (method):
SYNOPSIS
public void CairoContext::fill (void )
DESCRIPTION
Procedural style:
void cairo_fill (CairoContext $context)
A drawing operator that fills the current path according to the current CairoFillRule, (each sub-path is implicitly closed before being
filled). After CairoContext::fill or cairo_fill(3), the current path will be cleared from the CairoContext.
PARAMETERS
o $context
- A valid CairoContext object created with CairoContext::__construct or cairo_create(3)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->setSourceRgb(1, 1, 1);
$c->rectangle(0, 0, 50, 50);
$c->fill();
$c->setSourceRgb(0, 1, 0);
$c->rectangle(50, 50, 50, 50);
$c->fill();
$s->writeToPng(dirname(__FILE__) . '/cairo_fill.png');
?>
The above example will output something similar to:
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($c, 1, 1, 1);
cairo_rectangle($c, 0, 0, 50, 50);
cairo_fill($c);
cairo_set_source_rgb($c, 0, 1, 0);
cairo_rectangle($c, 50, 50, 50, 50);
cairo_fill($c);
cairo_surface_write_to_png($s, dirname(__FILE__) . '/cairo_fill.png');
?>
The above example will output something similar to:
SEE ALSO
CairoContext::setFillRule, ContextContext::fillPreserve, CairoFillRule.
PHP Documentation Group CAIRO_FILL(3)
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