Large Image Export

[Kevin Rushforth]

This is RT-22073 <https://javafx-jira.kenai.com/browse/RT-22073> which 
is currently targeted for 9, but could be moved into 8u20 if there was 
enough demand to fix it. The (rather ugly) app-level workaround is to 
break the operation up into 4Kx4K tiles, and render the tiles in a loop 
specifying the appropriate viewport and translation via ShapshotParams.

-- Kevin



Danno Ferrin wrote:
> While working on a fun project I discovered that the Image Export limits
> the size of the export textures, mostly depending on your graphics stack.
>  Here's one example:
>
> java.lang.RuntimeException: Requested texture dimensions (20581x245)
> require dimensions (0x245) that exceed maximum texture size (16384)
> at com.sun.prism.es2.ES2RTTexture.create(ES2RTTexture.java:220)
> at
> com.sun.prism.es2.ES2ResourceFactory.createRTTexture(ES2ResourceFactory.java:106)
> at
> com.sun.prism.es2.ES2ResourceFactory.createRTTexture(ES2ResourceFactory.java:102)
> at
> com.sun.javafx.tk.quantum.QuantumToolkit$QuantumImage.getRT(QuantumToolkit.java:1210)
> at com.sun.javafx.tk.quantum.QuantumToolkit$18.run(QuantumToolkit.java:1345)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at com.sun.javafx.tk.RenderJob.run(RenderJob.java:58)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at
> com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:129)
>
> This is on a mid-2012 Mac Book Air, and the MacGLConext looks to limit
> dimensions to 2^14.
>
> Is there anything I can do other than making sure my nodes don't get bigger
> than 16K on one side?  I've tried setting a transform on the snapshot and
> zooming it below 16k, but it still gets the same exception with he same
> dimensions.
>
> --Danno
>