Read pixels that have been painted on a Canvas?

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Cameron Fitzhugh - 30 Oct 2006 01:22 GMT

I've been painting on a Canvas using the Graphics object returned by
getGraphics(). I would like to save an area on the Canvas and later write
it back to the Canvas. I've been looking for some way to create a
BufferedImage using the pixels from a Graphics object, but no luck.

How do I obtain the pixels from an area on a Canvas?

Thanks,
Cameron

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Knute Johnson - 30 Oct 2006 03:27 GMT

> I've been painting on a Canvas using the Graphics object returned by
> getGraphics(). I would like to save an area on the Canvas and later write
[quoted text clipped - 5 lines]
> Thanks,
> Cameron

Draw them on the BufferedImage first, then draw the BufferedImage onto
the Canvas.

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Knute Johnson
email s/nospam/knute/

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Josh Falter - 30 Oct 2006 16:34 GMT

There's always the classic java.awt.Robot createScreenCapture() or
getPixelColor()

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Andrew Thompson - 30 Oct 2006 17:24 GMT

> There's always the classic java.awt.Robot createScreenCapture() or
> getPixelColor()

Your definition of 'always' does not include
sandboxed applications and applets?

Andrew T.

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Read pixels that have been painted on a Canvas?

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