[OpenJDK 2D-Dev] request for review: xrender pipeline ignores center-coordinates of RadialGradient

Andrew Brygin andrew.brygin at oracle.com
Tue Oct 22 16:19:25 UTC 2013

Hello Clemens,

  I have played with the tests, and Java2D demo,
  and the fix looks fine to me.


On 10/20/2013 9:55 PM, Clemens Eisserer wrote:
> Hi,
> Ok, this starts to become embarrassing ... sorry for the review
> request spam recently.
> I was stressed that my changes would be submitted too late, so I
> submitted as soon as I had a fix for an isolated issue.
> During extensive testing I've found a few other issues within the
> xrender pipeline paint support.
> Please review the latest (and from my side last) revision of the
> patch: http://cr.openjdk.java.net/~ceisserer/fix13/webrev.03/
> Additional changes/fixes compared to webrev.02 are:
> 1. The xrender pipeline "accelerated" LinearRGB color model gradients,
> although xrender (from what I found out) only supports sRGB. The
> pipeline now falls back to software loops when a LinearRGB gradient is
> requested. (Test:
> http://cr.openjdk.java.net/~ceisserer/fix13/LinearColorSpaceGradientTest.java
> )
> 2. An AffineTransform can be specified when creating a linear or
> radial gradient paint.
> This transform was not applied correctly. The fix makes use of the
> same mechanisms introduced for TexturePaint's transform support
> introduced in webrev.02 and does away with special transform handling
> previously performed at gradient construction time. (Test:
> http://cr.openjdk.java.net/~ceisserer/fix13/GradientTransformTest.java
> )
> 3. The interpolation value set for a TexturePaint at creation time was
> never changed.
> Therefore, switching to bilinear interpolation is ignored in case the
> TexturePaint was created with the rendering hint set to nearest
> neighbour.
> There is already is a mechanism for re-validating source-surface
> properties, so this has been extended to revalidate the interpolation
> setting too. This issue is also present in the OpenGL pipeline (didn't
> test d3d). (Test:
> http://cr.openjdk.java.net/~ceisserer/fix13/TexturePaintInterpolationTest.java
> )
> Thanks, Clemens

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