[macOS] Max GUI scale is limited to 3 in fullscreen

[unilock]

I've been using this fork of LWJGL2 with Forge 1.7.10 for a short while.

I've noticed that, in regular windowed mode, the GUI scale (option in Video Settings) can range from 1 to about 5, with 1 being very small and 5 being decently large (thanks to HiDPI). However, in fullscreen mode, the GUI scale can only range from 1 to 3, with 1 and 2 being small, and 3 being slightly larger than 5 in windowed mode (so, probably 6) - slightly too large to play comfortably.

I assume this has something to do with this fork's HiDPI fixes for macOS.

OS: macOS Sequoia 15.5
Java: Azul Zulu JDK 8
Minecraft: Forge 1.7.10

I'm also using Angelica. Its logic for calculating the maximum GUI scale can be found here.

[thecatcore]

Hello, can you try again with build 13? It includes some MacOs related fixes.

[unilock]

Trying with build 14, and now I'm getting a very strange crash upon window creation:

java.lang.NoSuchMethodError: java.nio.ByteBuffer.flip()Ljava/nio/ByteBuffer;
	at org.lwjgl.MemoryUtil.encode(MemoryUtil.java:280)
	at org.lwjgl.MemoryUtil.encode(MemoryUtil.java:238)
	at org.lwjgl.MemoryUtil.encodeUTF8(MemoryUtil.java:211)
	at org.lwjgl.opengl.MacOSXDisplay.setTitle(MacOSXDisplay.java:285)
	at org.lwjgl.opengl.Display.setTitle(Display.java:541)
	at org.lwjgl.opengl.Display.createWindow(Display.java:312)
	at org.lwjgl.opengl.Display.create(Display.java:848)
	at org.lwjgl.opengl.Display.create(Display.java:757)
	at net.minecraftforge.client.ForgeHooksClient.createDisplay(ForgeHooksClient.java:327)
	at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:432)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:878)
	at net.minecraft.client.main.Main.main(SourceFile:148)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:105)
	at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129)
	at org.prismlauncher.EntryPoint.main(EntryPoint.java:70)

Downgrading to build 10 (since 11 and 12 aren't available on the maven) works around this issue.

[thecatcore]

Argh, I'll fix it as soon as possible. Another possible workaround would be to use Java 17+ in this case.

[unilock]

Unfortunately, Forge 1.7.10 is not compatible with Java 17... (and, in this particular instance, I cannot use lwjgl3ify)

[thecatcore]

Hello, can you try again with build 15?

[unilock]

The game does start now, but the GUI scale still only goes up to 3 - however, now this occurs regardless of whether the game is fullscreen. It's as if HiDPI has been completely disabled?

[unilock]

I think this issue is likely related to the following comment on a PR that was merged into this fork: MinecraftMachina#1 (comment)

Apparently, HiDPI being disabled in fullscreen is intentional... is there any way to forcibly enable it regardless?

[thecatcore]

Was about to answer that, you can pass this arg to java args from what I've read:
-Dorg.lwjgl.opengl.Display.enableHighDPI=true

[thecatcore]

Just note that it doesn't seem to be enabled in fullscreen tho.

[thecatcore]

Oh gosh I've just realized I've misread your comment.
Apparently no one truly looked into getting it working properly as mentioned in MinecraftMachina#2.
I don't own Apple hardware and barely know C so I currently have no idea how to fix this issue and it would be quite difficult for me to even debug it.