The subsequent DirectX9 motion/background report exposed another reset and projection path; see DIRECTX9_FULLSCREEN_FOLLOWUP.md for its repair and tests.
The authorized follow-up repairs CNA's Vulkan/Canvas scaling and DirectX9 device-loss
recovery. CNA commit: 6f6100cd35df, based on a62c40b09e86.
No Mobile Eggbert or SharpRuntime source was changed during this repair.
Vulkan now retains the logical SpriteBatch projection separately from the physical presentation viewport. Canvas applies presentation scaling, centered letterboxing, viewport clipping and matching input-coordinate transforms. Custom viewports, user transforms, deferred batches and offscreen render targets are covered by pixel checks.
DirectX9 checks and recovers the device before entering Game.Draw. Update continues while Draw waits for restoration. A failed fullscreen Reset is retried against current drawable dimensions, and native reset invalidates the cached blend/depth states so they are reapplied.
- Linux Vulkan
- Web Canvas, with matching JS/WASM/data files
- Windows DirectX9
These three variants were rebuilt with the repair. The other nineteen variants retain the earlier build verification in BUILD_RENDERERS.md.
All graphical tests used CNA's private Weston/Xwayland runner. Chrome used a dedicated profile and Wine a dedicated prefix.
- Vulkan and browser Canvas: 11 presentation assertions each, including custom viewport clipping, Immediate transforms, independent deferred projections and RenderTarget2D isolation.
- Canvas host unit tests: 19/19 pass, including Letterbox/input and Stretch/HiDPI cases.
- Existing Vulkan presentation-mode and 3D viewport-subregion probes: both pass.
- DirectX9 recovery probe: Update continues while lost Draw is skipped; explicit restoration resumes drawing. A deliberately held backbuffer makes fullscreen Reset fail; releasing it restores drawing. Native AlphaBlend/depth settings are checked after reset.
- Actual Vulkan game at 1600 x 900: correctly enlarged 1500 x 900 image with 50-pixel side bars.
- Actual Canvas page Fullscreen at 1920 x 1024: correctly centered 1707 x 1024 image, with Resize canvas both checked and unchecked; exiting restores 800 x 480.
- Actual DirectX9 F11 under Wine: process remains alive and image fills the private fullscreen surface. The private Vulkan F11 display changes to 800 x 480; larger-size scaling was verified independently by resizing and pixel probes.
The Wine backbuffer warning still appears; its reference owner remains unconfirmed. The recovery defects are repaired and tested without claiming the warning itself was eliminated. Web F11 is excluded by the game's existing InputPad code; this repair covers the page's Fullscreen button. OpenGLES rendering and the earlier alpha-content discrepancy are deferred.
- CNA task and implementation details
- Native regression results
- Canvas browser pixel checks
- DirectX9 deterministic recovery
- Vulkan resized image
- Canvas fullscreen image
- DirectX9 fullscreen image
Build logs are linux-vulkan-final-build.log, canvas-final-build.log and
directx9-final-build.log in build/logs/fullscreen-fixed/. Full CNA-root CTest was not run;
the probes use the consumer's toolchains and freshly built CNA libraries.