[OpenJDK 2D-Dev] Request for Review: JDK-8162591 All existing gradient paint implementations have issues with coordinates/sizes larger than Short.MAX_VALUE (exactly) on any Linux systems

[Clemens Eisserer]

Hello,

The cause of JDK-8162591 is Java2D's gradient implementation allowing
for coordinates to be specified using floating point values, whereas
XRender is limited to a 16.16 fixed point format - which can therefor
easily overflow.

This patch checks whether the supplied coordinates can be represented
by XRenders fixed-point format, falling back to software otherwise.

Please find a fist version of the proposed patch at:
http://93.83.133.214/8162591/webrev.01/

Thank you in advance and best regards, Clemens