RFR: 8350479: SW pipeline should use default pipeline in Glass [v2]

[Marius Hanl]

On Thu, 14 Aug 2025 07:26:04 GMT, Jayathirth D V <jdv at openjdk.org> wrote:

>> We have Metal pipeline also now in macOS apart from OpenGL pipeline for accelerated hardware pipelines.
>> 
>> Currently when Software pipeline is used we continue to use OpenGL(ES2) pipeline on glass side, which is the default hardware pipeline in macOS. If we want to switch to Metal pipeline as default hardware pipeline in prism, we should be able to use Metal pipeline in glass also when software pipeline is used. For this to happen we need to set some information when SWPipeline is getting initialized and pass that information to glass.
>> 
>> This PR adds new flag `useMTLInGlass` in device details when SWPipeline is getting initialized and then passes it to glass code. When SWPipeline is used, based on this flag we will use appropriate hardware pipeline in glass.
>> 
>> Patch is tested when useMTLInGlass is set to true/false and then using -Dprism.order=es2/mtl/sw and it picks proper GlassView/Layer.
>
> Jayathirth D V has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Pick default pipeline from PrismSettings

modules/javafx.graphics/src/main/java/com/sun/prism/impl/PrismSettings.java line 209:

> 207:         // macDefaultPipeline flag will be used to determine whether to
> 208:         // use es2/mtl pipeline in glass, when sw pipeline is used in prism
> 209:         macDefaultPipeline = macDefaultOrderArr[0];

Since this is a platform independent file, should we name this property in a generic way (even if it is only used for MacOS)?
Something like `defaultPipeline?`

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PR Review Comment: https://git.openjdk.org/jfx/pull/1868#discussion_r2278848018