[Rev 02] RFR: 8238954: Improve performance of tiled snapshot rendering

[Frederic Thevenet]

On Fri, 13 Mar 2020 17:26:35 GMT, Ambarish Rapte <arapte at openjdk.org> wrote:

>> Frederic Thevenet has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Avoid useless width and height calculation
>
> modules/javafx.graphics/src/main/java/com/sun/javafx/tk/quantum/QuantumToolkit.java line 1576:
> 
>> 1575:                         // Find out it is is possible to divide up the image in tiles of the same size
>> 1576:                         AtomicBoolean exactWidthDivFound = new AtomicBoolean(false);
>> 1577:                         int tileWidth = computeOptimumTileSize(w, maxTextureSize, exactWidthDivFound);
> 
> `exactWidthDivFound` is unused, may be can skip creating a named variable and just pass a unnamed `AtomicBoolean` in
> next call to `computeOptimumTileSize`

I've made a change so that null can be passed to the method if the AtomicBoolean instance is not needed.

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PR: https://git.openjdk.java.net/jfx/pull/112