HUD Text API

[zr0n1]

A simple API for adding (debug) text to the game HUD.

@EventListener
private static void renderHudText(HudTextRenderEvent event) {
    // The position will change based on whether the debug HUD is enabled
    event.left.add(new HudTextLine("This text displays regardless of whether the debug HUD is enabled!"));
    if (event.debug) {
        event.left.add(new HudTextLine("This text only displays on the debug HUD!", 0xE0E0E0));
    } else {
        // This will only succeed if the priority exceeds other mods with version text or other mods' version texts are disabled
        event.setVersion(new HudTextLine("StationAPI v2.0-alpha.3"));
        Collections.addAll(event.right,
                new HudTextLine("Hello " + event.minecraft.player.name + "!"),
                new HudTextLine("This line is doubly offset from the last. Perchance.", 0xFFFFFF, 20)
        );
    }
}

[calmilamsy]

Mostly surface-level concerns. The implementation is otherwise very good, and I'm more than happy to merge this once my issues are addressed.

[calmilamsy]

Last concern.

[zr0n1]

done

[mineLdiver]

Surface level review, but I have some big concerns:

1. HudTextLine being instantiated dozens of times each frame.
2. Vanilla debug renderer being completely skipped.

In my opinion, HudTextLine should instead contain a template string and an array of callbacks for formatting, so that it can be instantiated once and always be up-to-date.

For example: Template "Used memory: %d\% (%dMB) of %dMB", the array of callbacks being:

var callbacks = new Supplier[] {
  () -> (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) * 100L / Runtime.getRuntime().maxMemory(),
  () -> (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / 1024L / 1024L,
  () -> Runtime.getRuntime().maxMemory() / 1024L / 1024L
}

This is just a working example, this could be optimized by using a single class with its methods registered as callbacks, so the calculated values could be shared.

Making HudTextLine use callbacks also enables the debug HUD to just be built once instead of each frame.

As for the vanilla lines being completely canceled, I feel like a more surgical approach must be taken where there's a way to cancel each line (maybe by using something like EnumSet<VanillaHudLine> canceled?) and then overwrite the freed space while building the debug HUD. StAPI shouldn't have to render Minecraft's debug if it's unchanged.