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Racing Milestone 9 — feature-complete Linux OPENGL33

Result

Milestone 9 completed on 2026-09-03. The Linux OPENGL33 reference port is feature-complete against the canonical XNA 4 source and the unchanged authentic XNA Game Studio 4 content products. The final source audit maps all 58 original C# files, the real Debug and Release executables complete the full screen/race lifecycle, and no modern-repository, GLB, loose-asset or sample-local framework substitute participates.

This is a runtime qualification result, not permission to redistribute the Microsoft content. The separate release gate remains blocked until a canonical license grant is available.

Current-head requalification — 2026-10-03

The complete Release gate was rebuilt and rerun from clean current trees at cna-samples start head 90c3437b6, CNA dfc6a019334eb260e9af9c80f10e9c297154e5bb and Sharp Runtime db86514c5bb86a5886d8015b8e2916d49be04ae8. Physics produced 753 passing records, Track/Replay produced 79, the GPU harness passed 144/144, and DrivableScene, ScreenFlow, MenuScreens, DesktopRuntime, DeviceReset and the 7,200-frame RaceReturn all passed. DesktopRuntime wrote a nonempty JPEG screenshot. The source/authentic-product audit still passes 325/325 and 358/358 and still emits REDISTRIBUTION_STATUS=BLOCKED_MISSING_CANONICAL_LICENSE.

Current CNA deliberately reproduces genuine XNA4-wide x87-style matrix/vector dot products. The native probes now pin those XNA-profile trajectories and transformed guard/column vertices, while the FNA/.NET 8 comparison retains exact records around that measured arithmetic boundary. Current pointer-returning Effect collection elements are dereferenced mechanically throughout the game and harness. Evidence is under evidence/cna-opengl33/current-20261003/release/ in the stable artifact root.

Frozen revisions

  • cna-samples before Milestone 9: 753e73c;
  • CNA before the Milestone 9 storage repair: 056e57d47;
  • CNA after the repair: 822d3b960;
  • sharp-runtime before the repair: 6baf0925;
  • sharp-runtime after the repair: c419f477;
  • meta-gl: 20c8b2dc5bb80e32706784066db9fd9e15b3f46a;
  • EasyGL: deda7a426c3c166c0e03a4790f1ede610e2e46fb;
  • renderer/profile: CNA OPENGL33, HiDef, Mesa llvmpipe OpenGL 4.5 core.

Source closure

The source-to-source audit is retained in racing_source_audit.md. Milestone 9 restored the remaining desktop behaviors found by that audit:

  • ScreenshotCapturer is an XNA GameComponent, detects PrintScreen, preserves the original sparse screenshot-number search and writes a real JPEG through XNA storage;
  • Log preserves isolated Log.txt, the two-MiB rotation rule, original session header, timestamped entries, immediate flush and Debug console output;
  • the F1 and gamepad LeftShoulder+Y Debug FPS toggles, one-second counters and monotonically decreasing Model.MaxViewDistance tiers are active;
  • the Release-only render exception budget uses the original post-increment boundary;
  • the dormant LineManager3D source branch retains both color overloads, the 4,096-line cap, cross-frame collection reuse and the authentic LineRendering3D effect; the GPU harness proves visible world-space lines;
  • a real DeviceReset caused by applying the original 640x480 option rebuilds shadow, glow and menu render targets before the next complete frame.

LineManager3D has no world-space producer in the selected original game source; the only original BaseGame.DrawLine call sites are the 2D highscore separators. The 3D class is retained and tested rather than inventing a new product use.

Upstream repair

The new log exposed an actual sharp-runtime host-integration bug: desktop IsolatedStorage used current_path()/.cna_isolated_storage, and Android carried an unrelated hard-coded application identity. That made a correct XNA-style Log write into whichever build or repository directory launched the game.

Sharp-runtime commit c419f477 adds a thread-safe host override to its internal StoragePaths service. CNA commit 822d3b960 connects StorageDevice::SetAppNameEXT to that service, selecting <CNA per-user application root>/.cna_isolated_storage. Racing still calls the normal System::IO::IsolatedStorage API and contains no path workaround.

Regression evidence:

  • sharp-runtime full build: zero errors and warnings, maximum two jobs;
  • sharp-runtime complete component gate: 17,939/17,939 across 40 executables;
  • focused sharp StoragePathsTests: 3/3;
  • CNA CnaStorageTests: 10/10, including exact application-root correlation;
  • Racing desktop probe: Log.txt exists in the scoped root and contains the original session header plus a flushed entry;
  • no .cna_isolated_storage directory is left in cna-samples.

Qualification

All Racing compilation used at most eight jobs. The sharp-runtime gate used its stricter permanent maximum of two.

  • cumulative Debug and ASan/UBSan OPENGL33 harness: 151/151 in both builds;
  • the real RacingGame_cna_samples product executable links cleanly in Debug, ASan/UBSan and Release (the probes use the same RacingGameApplication owner);
  • post-source-audit base harness rerun: 144/144 in Debug, ASan/UBSan and Release;
  • Debug and ASan/UBSan physics oracle: 753 records, maximum camera difference 16 ULP;
  • Debug and ASan/UBSan Track/Replay oracle: 79/79 records;
  • complete drivable scene, settings, screen flow, menu screens, natural race return, desktop runtime and device reset: PASS in Debug and ASan/UBSan;
  • Release versions of every preceding probe: PASS; Release harness 144/144;
  • natural 7,200-frame race completion and return to menu: PASS in Debug, ASan/UBSan and Release;
  • FNA/CNA static-scene comparison: normalized RMSE 0.002230, 99.0503% of channels within two, maximum channel delta 19;
  • LeakSanitizer classification: 100,956 bytes in 449 allocations, with every allocation stack wholly rooted in external libGLX_mesa; no Racing, CNA or sharp-runtime frame;
  • Release 7,200-frame llvmpipe run: 2:53.66 wall clock, 705,908 KiB maximum RSS, zero swaps, exit 0;
  • source manifest: 325/325 hash-verified;
  • authentic XNA build manifest: 358/358 hash-verified, including 339 XNBs and 17 copied/XACT products;
  • git diff --check: PASS.

Desktop OpenGL does not expose the Direct3D-style lost-device event as a normal runtime condition. Milestone 9 therefore tests CNA's real reset route and resource recreation without adding a fake production LoseDevice API.

Release boundary

The canonical snapshot contains no LICENSE, EULA, COPYING or RTF grant and retains the notice Microsoft Corporation; All rights reserved. The exact inventory and packaging rule are in racing_release_gate.md. No canonical content asset is committed to cna-samples.

Next milestone

Milestone 10 owns Windows OPENGL33 build, packaging and runtime qualification. Linux completion does not imply Windows, Android or Web support.