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  g2d.getDeviceConfiguration() & BufferStrategy.  (Read 1235 times)
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JGO Knight

Medals: 34

falling into the abyss of reality

« Posted 2004-05-10 14:46:03 »

The following gives erratic results - and I was wondering why (whether it would manifest itself as a bug on platforms other than windows - where GraphicsConfiguration objects don't all use the same ColorModel):-

Frame f = new Frame();
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();
gd.setDisplayMode(new DisplayMode(800,600,32,60));
GraphicsConfiguration gc = ((Graphics2D)f.getBufferStrategy().getDrawGraphics()).getDeviceConfiguration();

sometimes I get :-


othertimes I get :-


I guess pixfmt=0 is the pixelformat for describing the front page of a flipping strategy, I say that because pixfmt=0 is not an option available normally through graphicsDevice.getGraphicsConfigurations().
pixfmt=1 is avaiable through said method, (it is the default GraphicsConfiguration - atleast on my system)
If I use the Frame constructor Frame(GraphicsConfiguration gc), the GC I passed in is the GC i get back from graphics2d.getDeviceConfiguration().

Is it giving indeterminate results, because the front and back buffers in a page flipping strategy have different pixel formats (or atleast, different GraphicsConfiguration objects), and I am randomly geting either the front buffer, or the back buffer. (if this is the case - it seems like a bug in the making :S)


btw, this has little relevance to any app. im writing - I'm just trying to figure out exactly what is happening underneath the bonnet [US: hood] of java2d Cheesy

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Offline trembovetski

Senior Devvie

If only I knew what I'm talking about!

« Reply #1 - Posted 2004-05-13 03:13:45 »

yeah, it's really strange that you're getting random results. I'd expect it to be consistent..
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