RFR: 8261620: Running metal with API validation crashes immediately

Fri Feb 12 08:08:45 UTC 2021

On Fri, 12 Feb 2021 07:55:27 GMT, Ajit Ghaisas <aghaisas at openjdk.org> wrote:

> Root cause : Trying to copy backbuffer-texture to frontbuffer-texture after accommodating for Insets causes some overflow which is detected only with Metal API validation.
> 
> Fix : Adjusted texture size to be copied to accommodate insets.

This patch resolves API validation error captured at : https://github.com/openjdk/jdk/pull/2403#discussion_r574820559
I have verified running J2DDemo, SwingSet2 and Font2DTest.

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PR: https://git.openjdk.java.net/lanai/pull/184