RFR: 8346281: [Windows] RenderScale doesn't update to HiDPI changes

[Andy Goryachev]

On Thu, 6 Nov 2025 18:58:15 GMT, Jose Pereda <jpereda at openjdk.org> wrote:

>> modules/javafx.graphics/src/main/native-glass/win/GlassWindow.cpp line 824:
>> 
>>> 822: {
>>> 823:     JNIEnv* env = GetEnv();
>>> 824:     float scale = (float) LOWORD(wParam) / (float) USER_DEFAULT_SCREEN_DPI;
>> 
>> could we simply declare `USER_DEFAULT_SCREEN_DPI` to be a `float`?
>
> No need, I've removed the casting, it wasn't needed.

if you declare this constant as float, you won't have to cast and it won't be converted each time it's used.  saves 0.3 nanoseconds!  :-)

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PR Review Comment: https://git.openjdk.org/jfx/pull/1964#discussion_r2500455779