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Gtk2::Gdk::Pixbuf::DraUseraContributed Perl DGtk2::Gdk::Pixbuf::Draw::Cache(3)

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

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

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

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

       Returns

       a new Gtk2::Gdk::Pixbuf::Draw::Cache

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

       ·   $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)
       ·   $old (Gtk2::Gdk::Pixbuf::Draw::Opts)

       ·   $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.

       old : the last draw options used
       new : the current draw options

       Returns

       the best draw method to use to draw

ENUMS AND FLAGS
   enum Gtk2::Gdk::Pixbuf::Draw::Method
       ·   'scale' / 'GDK_PIXBUF_DRAW_METHOD_SCALE'

       ·   'contains' / 'GDK_PIXBUF_DRAW_METHOD_CONTAINS'

       ·   '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 v5.14.1			  2011-06-21 Gtk2::Gdk::Pixbuf::Draw::Cache(3)

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