AD-98's fixed-canvas stretch (73041d70) scales every retained-UI quad at
TextRenderer.AppendQuad, but the live gate reported it JAGGED — text
especially. Cause: dat-font glyph atlases and IconComposer's composited
icons upload nearest (TextureCache.UploadUiTexture's UiNearestRepeat
sampler) — correct at the native 1:1 scale (pixel-exact retail art), but
aliased once magnified 2.4x1.8. Chrome/background art was already fine:
it uploads through GpuSamplerDescription.WorldRepeat (linear) by default.
Retail's own fixed-canvas presentation is a single bilinear-filtered
frame blit, never a per-texture stretch — this closes that gap one step
earlier, at the source texture, without adding RHI surface area.
- TextureCache.GetOrCreateLinearUiTwin: lazily registers a SECOND table
slot for a nearest handle's IGpuTexture, sampled WorldRepeat (linear)
instead of nearest — no re-decode, no re-upload, no extra memory-ledger
bytes. Returns the handle unchanged for anything never registered
nearest (chrome, UiTextureTableHandle.None), so it's a cheap
unconditional probe. Twin slots are released in Dispose without
double-disposing the shared texture.
- TextRenderer.LinearTwinResolver + the DrawSprite chokepoint: swaps a
sprite's texture handle through the resolver only while
CanvasScale != One. At CanvasScale == One the resolver is never even
called — zero overhead on the ordinary in-world/UI path.
- InteractionRetainedUiComposition wires the resolver to TextureCache
right after every UiHost acquisition (the lease can hand back a host
from a prior session against a fresh TextureCache).
- AD-98's register row gets one added sentence recording the fix.
Tests: TextRendererLinearTwinTests pins the renderer-side handle-swap
seam GPU-free (segment handle selection); TextureCacheLinearTwinTests
pins twin creation/reuse/dispose against RecordingGpuDevice. App suite
5097/3 skips (Release, ACDREAM_PROBE_LIVE_MOUNT=1 live-DAT probes
included). Full solution builds clean.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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