CairoContext::clip

cairo_clip

(PECL cairo >= 0.1.0)

CairoContext::clip -- cairo_clip — Establishes a new clip region

Описание

Объектно-ориентированный стиль (method):

public CairoContext::clip ( void ) : void

Процедурный стиль:

cairo_clip ( CairoContext $context ) : void

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().

Список параметров

context: A valid CairoContext object

Возвращаемые значения

Эта функция не возвращает значения после выполнения.

Примеры

Пример #1 Объектно-ориентированный стиль


<?php

$surface = new CairoImageSurface(CairoFormat::ARGB32, 50, 50);

$context = new CairoContext($surface);

$context->clip();

?>

Пример #2 Процедурный стиль


<?php

$surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 50, 50);

$context = cairo_create($surface);

cairo_clip($context);

?>

Смотрите также

CairoContext::resetClip() - The resetClip purpose
cairo_reset_clip() - The resetClip purpose