Hi Gary, > > > The setComposite method of anything that extends java.awt. > > > Graphics2D is supposed to do a permisson check if "...this > > > Graphics2D context is drawing to a Component on the display > > > screen and the Composite is a custom object rather than an > > > instance of the AlphaComposite class." The latter is easy > > > to check, but how do I tell whether the context is drawing > > > to a Component on the display screen? > > > > Only one subclass of CairoGraphics2D draws on the screen, I > > think this is ComponentGraphics. > > Ok. Do you know about its subclass, VolatileImageGraphics? VolatileImage doesn't draw on the screen. It draws on a backbuffer (an XImage really). I don't know if that counts as drawing on screen though. Because the backbuffer should be synced with the screen sooner or later. But maybe you try against the JDK (Component.createVolatileImage() gives you a VolatileImage instance). /Roman -- ?Improvement makes straight roads, but the crooked roads, without Improvement, are roads of Genius.? - William Blake -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 191 bytes Desc: Dies ist ein digital signierter Nachrichtenteil Url : http://developer.classpath.org/pipermail/classpath/attachments/20060612/3b521618/attachment.pgp
