[BATIK-924] NegativeArraySizeException in MultipleGradientContextPaint.calculateGradientFractions

• Type: Bug
• Status: Open
• Resolution: Unresolved
• Affects Version/s: 1.7
• Component/s: Utilities
• Environment: Operating System: Windows XP; Platform: PC
• Assignee: Batik Developer's Mailing list
• Reporter: Kirill Grouchnikov
• Created: 09/Oct/09 16:50
• Updated: 12/Oct/09 09:14

Description

Line 359 of org.apache.batik.ext.awt.MultipleGradientContextPaint compares the float value of Imin to 0.0. However, due to float-point limitations, under some conditions this value can be negative - leading to this exception stack trace:

java.lang.NegativeArraySizeException
at org.apache.batik.ext.awt.MultipleGradientPaintContext.calculateSingleArrayGradient(MultipleGradientPaintContext.java:460)
at org.apache.batik.ext.awt.MultipleGradientPaintContext.calculateGradientFractions(MultipleGradientPaintContext.java:378)
at org.apache.batik.ext.awt.MultipleGradientPaintContext.<init>(MultipleGradientPaintContext.java:297)
at org.apache.batik.ext.awt.RadialGradientPaintContext.<init>(RadialGradientPaintContext.java:137)
at org.apache.batik.ext.awt.RadialGradientPaint.createContext(RadialGradientPaint.java:464)
at sun.java2d.pipe.AlphaPaintPipe.startSequence(AlphaPaintPipe.java:65)
at sun.java2d.pipe.DuctusShapeRenderer.renderPath(DuctusShapeRenderer.java:74)
at sun.java2d.pipe.DuctusShapeRenderer.fill(DuctusShapeRenderer.java:49)
at sun.java2d.pipe.ValidatePipe.fill(ValidatePipe.java:142)
at sun.java2d.SunGraphics2D.fill(SunGraphics2D.java:2261)

The negative value is around 1e-07, and can be addressed by changing the condition from (Imin == 0) to (Imin <= 0)

Thanks
Kirill