RFR: 8278595: Provide more information when a pipeline can't be used

[Kevin Rushforth]

On Mon, 13 Dec 2021 11:00:02 GMT, Johan Vos <jvos at openjdk.org> wrote:

> This PR provides at least some basic information when a pipeline can't be used. 
> There are a number of reasons why a candidate pipeline can't be used, and this PR makes it clear at which point the pipeline fails. 
> 
> The changes are only applied in case `prism.verbose` is already set to `true`, so there is no unwanted logging.

Looks fine. I left one minor comment about an extra blank line. You can fix it or not. I'll re-approve  if you do.

modules/javafx.graphics/src/main/java/com/sun/prism/es2/ES2Pipeline.java line 75:

> 73:         creator = Thread.currentThread();
> 74: 
> 75: 

Minor: extra blank line not needed.

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Marked as reviewed by kcr (Lead).

PR: https://git.openjdk.java.net/jfx/pull/693