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  1. JDK
  2. JDK-8106145

Hand tune the Java and SSE based Shadow filter implementations

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: fx1.0
    • Fix Version/s: fx1.1
    • Component/s: javafx
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      Description

      The Shadow filter is used in many common situations, including a component of the DropShadow and InnerShadow effects and also the PhongLighting effect. Right now any device without hardware (GPU) acceleration will use either a native compiled (SSE enabled) function or a Java method that was written by the automated JSL compiler. The code is surprisingly fast for code that was derived from a Shader source language, but it isn't as fast as it could be by rewriting the inner loops by hand.

      A quick hand-tuning of the inner loops of the Java and SSE backends for Shadow show approximately a 6x improvement in Shadow and DropShadow. Here is a quick table of the results:

                                            radius 10 radius 63
      JSL Java 89 955
      JSL SSE 56 650

      Hand tuned Java 21 150
      Hand tuned SSE 12.5 83

      D3D 5 13

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              Assignee:
              flar Jim Graham
              Reporter:
              flar Jim Graham
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