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CairoContext::clip


(PECL cairo >= 0.1.0)

CairoContext::clip -- cairo_clipEstablishes a new clip region

Beschreibung

Object oriented style (method):

public void CairoContext::clip ( void )

Procedural style:

void cairo_clip ( CairoContext $context )

Establishes a new clip region by intersecting the current clip region with the current path as it would be filled by CairoContext::fill or cairo_fill() and according to the current fill rule (see CairoContext::setFillRule or cairo_set_fill_rule()).

After CairoContext::clip or cairo_clip(), the current path will be cleared from the cairo context.

The current clip region affects all drawing operations by effectively masking out any changes to the surface that are outside the current clip region.

Calling CairoContext::clip or cairo_clip() can only make the clip region smaller, never larger. But the current clip is part of the graphics state, so a temporary restriction of the clip region can be achieved by calling CairoContext::clip or cairo_clip() within a CairoContext::save/ CairoContext::restore or cairo_save()/cairo_restore() pair. The only other means of increasing the size of the clip region is CairoContext::resetClip or procedural cairo_reset_clip().

Parameter-Liste

context

A valid CairoContext object

Rückgabewerte

Es wird kein Wert zurückgegeben.

Beispiele

PHP Code
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$surface = new CairoImageSurface(CairoFormat::ARGB32, 50, 50); $context = new CairoContext($surface); $context->clip();

PHP Code
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$surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 50, 50); $context = cairo_create($surface); cairo_clip($context);

Siehe auch