GlynnTucker.Cache 0.1.1 (Default branch)

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gtk2::gdk::pixbuf::draw::cache

Gtk2::Gdk::Pixbuf::Draw::Cache(3pm)			User Contributed Perl Documentation		       Gtk2::Gdk::Pixbuf::Draw::Cache(3pm)

NAME

       Gtk2::Gdk::Pixbuf::Draw::Cache -  Cache for drawing scaled pixbufs

DESCRIPTION

       Gtk2::Gdk::Pixbuf::Draw::Cache provides a cache that should be used by the Gtk2::ImageView::Tool when redrawing the Gtk2::ImageView.

HIERARCHY

	 Glib::Boxed
	 +----Gtk2::Gdk::Pixbuf::Draw::Cache

METHODS

   cache = Gtk2::Gdk::Pixbuf::Draw::Cache->new
       Returns a new pixbuf draw cache.

   $cache->draw ($opts, $drawable)
       o   $opts (Gtk2::Gdk::Pixbuf::Draw::Opts)

       o   $drawable (Gtk2::Gdk::Drawable)

       Redraws the area specified in the pixbuf draw options in an efficient way by using caching.

       cache : a GdkPixbufDrawCache
       opts : the Gtk2::Gdk::Pixbuf::Draw::Opts to use in this draw
       drawable : a GdkDrawable to draw on

   $cache->free
       Deallocates a pixbuf draw cache and all its data.

   $cache->invalidate
       Force the pixbuf draw cache to scale the pixbuf at the next draw.

       Gtk2::Gdk::Pixbuf::Draw::Cache tries to minimize the number of scale operations needed by caching the last drawn pixbuf. It would be
       inefficient to check the individual pixels inside the pixbuf so it assumes that if the memory address of the pixbuf has not changed, then
       the cache is good to use.

       However, when the image data is modified, this assumtion breaks, which is why this method must be used to tell draw cache about it.

   method = Gtk2::Gdk::Pixbuf::Draw::Cache->get_method ($old, $new)
       o   $old (Gtk2::Gdk::Pixbuf::Draw::Opts)

       o   $new (Gtk2::Gdk::Pixbuf::Draw::Opts)

       Gets the fastest method to draw the specified draw options. old is assumed to be the last PixbufDrawOpts used and new is the one to use
       this time.

ENUMS AND FLAGS

   enum Gtk2::Gdk::Pixbuf::Draw::Method
       o   'scale' / 'GDK_PIXBUF_DRAW_METHOD_SCALE'

       o   'contains' / 'GDK_PIXBUF_DRAW_METHOD_CONTAINS'

       o   'scroll' / 'GDK_PIXBUF_DRAW_METHOD_SCROLL'

SEE ALSO

       Gtk2::ImageView, Glib::Boxed

COPYRIGHT

       Copyright (C) 2007 by Jeffrey Ratcliffe.

       This software is licensed under the GPL-3; see Gtk2::ImageView for a full notice.

perl v5.14.2							    2011-11-16				       Gtk2::Gdk::Pixbuf::Draw::Cache(3pm)

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