Hello Jan,
this is interesting. It looks very much like bug
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4445611
which was supposedly fixed in 1.4.
Could you extract and send over a simplified test that reproduces
the error?
Thanks,
Dmitri
On Fri, Feb 17, 2006 at 11:04:57AM +0100, "Jan B?senberg (INCORS GmbH)" wrote:
> I have run into an issue with some code that is a bit difficult for me
> to understand (because it was programmed by someone else who did not
> like commenting very much). Maybe someone can push me in the right
> direction to get a better understanding of this issue.
>
> In the code a custom composite is set for a Graphics2D object using the
> setComposite(...) method. After the drawImage(...) method gets called I
> see this InternalError:
>
> Exception in thread "AWT-EventQueue-0" java.lang.InternalError: Cannot
> construct general op for MaskBlit(...) Any CompositeContext
> at
> sun.java2d.loops.GraphicsPrimitive.setupGeneralBinaryOp(GraphicsPrimitive.java:476)
> at sun.java2d.loops.MaskBlit.makePrimitive(MaskBlit.java:115)
> at
> sun.java2d.loops.GraphicsPrimitiveMgr.locate(GraphicsPrimitiveMgr.java:142)
> at sun.java2d.loops.MaskBlit.locate(MaskBlit.java:43)
> at sun.java2d.loops.MaskBlit.getFromCache(MaskBlit.java:56)
> at sun.java2d.pipe.DrawImage.renderImageXform(DrawImage.java:428)
> at sun.java2d.pipe.DrawImage.transformImage(DrawImage.java:251)
> at sun.java2d.pipe.DrawImage.scaleImage(DrawImage.java:715)
> at sun.java2d.pipe.DrawImage.scaleImage(DrawImage.java:1012)
> at sun.java2d.pipe.ValidatePipe.scaleImage(ValidatePipe.java:201)
> at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3057)
> at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3006)
> at (our code)
>
>
> The Error occurs with JRE 1.6 b72 (and a bunch of previous releases).
> With JRE 1.5 this error did not occur, but a black rectangle gets
> painted. This is probably not the desired effect, either, but as I said,
> I have difficulties in understanding what exactly is happening.
>
> Is this InternalError a known bug? Do you think it is caused by our code
> (maybe in the custom composite) or is this rather a bug in the JDK? Any
> help is appreciated.
>
>
> Thanks
>
> Jan
>
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