<AWT Dev> Fwd: creating images using native code

Alan Snyder javalists at cbfiddle.com
Tue Aug 18 16:48:55 UTC 2015

Is this the right place to ask this question?

Unless my concerns are misguided, is seems that a public API is needed to replace uses of the internal API.


> Begin forwarded message:
> From: Alan Snyder <javalists at cbfiddle.com>
> Subject: <AWT Dev> creating images using native code
> Date: August 11, 2015 at 5:36:55 PM PDT
> To: awt-dev at openjdk.java.net
> I am currently creating images with data provided by native code by capturing the data in an int array then using that array to construct a DataBufferInt which is used to create a WritableRaster which is used to create a BufferedImage.
> That seems to work fine, except that looking at the code it appears that the buffer is considered untrackable, which sounds like a bad thing. Does that in fact prevent caching the image in a GPU, for example?
> If so, is there a good way to create a cacheable image?
> The solutions I have found so far all wind up processing the pixels one at a time at some point, as far as I can tell, which should not be necessary.
> I’m wondering why there is no way to simply declare that the buffer will not change in the future.
>  Alan

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