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

[Jayathirth D V]

On Fri, 15 Aug 2025 15:19:42 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> 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?`
>
> Since `macDefaultOrderArr` is already mac-specific, I'm not sure how much this helps without also refactoring the rest of the logic.
> 
> One possibility would be to move the if-then-else block up (before the check for the `"prism.order"` system property) and then assign the default pipeline after the tryOrder is assigned. I'll leave it up to Jay as whether he wants to do this.

if-then-else block requires "order" value to determine whether use is explicitly setting any value.

In case where user is explicitly setting `-Dprism.order=sw`, tryOrderArr will have only "sw" value. So we need macOS prism default order values outside of the if-then-else block.

Since we need this mac specific default order values, i think its okay to keep this mac specific flag.
I would like to keep the code as it is.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1868#discussion_r2281512492