forked from unom/punktfunk
enricobuehlerandClaude Fable 5
e92a0aaa00
Two [GPU]-class defects from design/pf-zerocopy-sweep-handoff.md; the code is compile- and unit-verified, the visual halves still owe on-glass time. - blend_ref reused a fence and command buffer after a wait timeout: on TIMEOUT it reset a fence that still had a pending signal and re-recorded a command buffer the GPU might still be executing — reached exactly in the contended case the CPU-synced path exists for (no timeline export + visible cursor + a >1 s GPU stall). A failed wait now drains the device before the reset (the VkBridge::import_linear precedent), and free_slots quiesces unconditionally instead of only when a timeline exists, so teardown after a timed-out sync blend no longer frees objects an outstanding submission references. (C1) - cursor_blend.comp anchored NV12 chroma blocks to the cursor's oy, not the surface chroma grid: for odd oy every UV sample averaged luma rows one below the rows it covers (a one-row colour fringe on the cursor's edges, ~half of all cursor positions) and the cursor's last row's chroma was never written. Block rows now anchor to the chroma grid the same way spans anchor to the word grid — y0 = floor(oy/2)*2, per-row cy guards for the straddle block — and blend_geometry counts blocks from the same anchor (one extra block when oy is odd; covered by new tests, including negative oy). cursor_blend.spv rebuilt (glslangValidator, spirv-val clean, drift gate passes). (C6) Owed on-glass: a stalled-GPU cursor session for C1; an odd-oy cursor colour check for C6 (subtle fringe on the cursor's top/bottom edge). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>