Window Resize Fix (Iris & Distant Horizons)

Minecraft 26.1 – 26.2 support. One file covers 26.1, 26.1.1, 26.1.2 and 26.2 on NeoForge.

The two depth-buffer defects this mod exists for are still present in Iris 1.11.2 and 1.11.3 — read out of their compiled code, unchanged from Iris 1.8.14 three minor versions ago:

• RenderTargets.resizeIfNeeded takes a new depth texture only when a version counter moves, and never compares the texture it is being handed.
• DHCompatInternal.reconnectDHTextures is guarded by a texture id that does not change when only the attachment was replaced — so the Distant Horizons framebuffers, which Iris's own resize walk stomps, never get their depth back.

Both fixes are ported. A third fix from the 1.21.1 builds is deliberately not here: it detached a stale depth/stencil attachment that Iris left behind when it alternated between two attachment points based on a format cache keyed by texture id. On 26.x that method has no branch and no cache — it always attaches to GL_DEPTH_ATTACHMENT, and the format travels on the GpuTexture. The defect is gone upstream, so shipping the fix would cost work on every attachment in exchange for nothing.

New: each fix now reports two counters in the log — whether its hook ran at all, and whether it actually had to act. A hook that never runs is a different problem from a fix that was never needed, and the log now tells them apart. Each fix also has its own switch in config/irisscalefix.properties, re-read while the game is running.

Tested in game on Minecraft 26.2 / NeoForge 26.2.0.75 with Iris 1.11.2, Distant Horizons 3.2.0-b, RenderScale 1.4.0-alpha.4 and BSL 10.1.3. On 26.1.x every injection point and the render-target accessor are verified against that version's own Iris build and client jar, but it has not been played there.

Minecraft 1.21.1 users: stay on 1.3.1. The two are not interchangeable.