D3D9 software line lists — 2026-10-15

The original CMR3 demo's ordinary Stages selection reached a checked rejection for primitive=2, count=12 on production dc0611212, module 02b41f09…. The retained video remained the main menu; a stage screen or race was not established. No draw payload, shader, FVF, stride, LASTPIXEL or antialias state was retained. This change implements the rejected topology without guessing those settings. The original game has not yet been rerun with this change.

Implementation

lib/d3d9-software-backend.js accepts bounded LINELIST snapshots, validates two source indices per primitive, and sets native topology flag 32. Polygon fill and cull do not apply to standalone lines. Antialiased lines and LINESTRIP remain checked errors; existing vertex/index limits remain in force.

src/09ah-d3d-software.wat clips an ordered pair against the six homogeneous planes and enabled user planes, interpolating the complete vertex payload at each intersection. POSITIONT retains its screen-space path. Each work record keeps three ABI storage slots but only AB owns coverage: the third slot is padding, not a degenerate triangle. Line topology bypasses polygon area and culling. It shares the existing non-AA line coverage, reciprocal-W varying interpolation, depth, shader, alpha, stencil, blend, and scissor operations. LASTPIXEL controls the terminal endpoint of each directed line.

Microsoft's D3D9 rasterization rules specify GDI coverage for non-antialiased lines. Its outline and fill documentation describes LASTPIXEL. Existing wireframe coverage is reused; this work does not claim an independent hardware oracle for every fractional-coordinate tie.

Actual validation

All runtime work was sequential on bx_9ef2wdsw in the independent checkout /home/user/cmr3-software-lines. No game or browser was launched. Existing CMR3 and Kkrieger checkouts and canonical modules were preserved.

• Owner 66708, 12:17:55.697–12:18:33.401 UTC, exit 0: canonical build and test-d3d9-software-backend.js, test-d3d-software-pipeline.js, test-d3d-software-user-clip.js, and test-d3d-software-resumable-setup.js all passed on 579c1eeead52cbf731a65312ff2b31633945fae0.
• Owner 68983, 12:21:02.762–12:21:18.159 UTC, exit 0: expanded backend test passed on 750bc13fd07a59dfed1e49b19533a561ffea1208. This commit changes only the test; production/compiler sources and the canonical module are identical to the first run.
• Three separate mutant checkouts each failed the intended assertion: restoring the old topology guard, ignoring user planes in the line clipper, and copying the original varying instead of interpolating the intersection.
• The line cases exercise indexed/nonindexed pairs, all eight slope octants in both directions, zero length and reversed endpoints, 18 combinations of LASTPIXEL/cull/fill, homogeneous left/near clipping, enabled sixth user plane plus disabled/inside/outside controls, clip-generated color, reciprocal-W interpolation, fixed POSITIONT, scissor, depth rejection, programmed color, additive blend and stencil multiplicity at shared endpoints, and malformed/AA/LINESTRIP refusals without framebuffer writes.

Canonical module: 1,803,537 bytes, SHA-256 937466db3545b9d016fb90dfd8a414eb82653b5ebbf7cc2db7c53d8cc87d49eb. Both runs preserved all 6,512 tracked source hashes; separate local Git-blob verification matches every tested file. The checkout was clean after testing. Runtime postflight at 12:21:42.880 UTC found no node/chrome/chromium/wine survivors. The slot was released to the root agent for Kkrieger.

Evidence and recovery

Local evidence is in scratch/runs/20261015-cmr3-software-lines/, including owner receipts, validate.js, validate-r2.js, extracted logs/source manifests/mutant diffs, and independent Git-blob checks. Archives were copied back and hash verified:

Rebuild the pinned source with bash tools/build.sh; run the four named test files sequentially using Node. The expanded test and mutant recipes are preserved in the second controller. Neither ignored compiled modules nor these run artifacts are backed up by the source commit.

Original-game replay handoff

Replay must wait for a fresh sole-runtime grant after the Kkrieger owner. Use the existing original-game controller and original assets described in docs/cmr3-registered-gameplay-20261015.md; substitute an independently staged checkout containing this production change and the canonical module hash above. Preserve the original 302-file inventory, native 12-file inventory, the genuinely registered 972-entry registry (182940 bytes, SHA-256 7e59a8770cf1c8d180943539247f3bd3dd5990f3e2eb1be91971250d2e9c7a54), and generated profile (316640 bytes, SHA-256 95f1edbc3cb9aa70a374a61b43bd16818636b0190aa841504130bb718c39c2c7). Use ordinary screenshot-informed Escape/Return navigation and a fresh bounded run/evidence directory; do not patch guest state or replay the previous input batches as proof of reaching the same menu. Verify the newly loaded module, record the first remaining renderer error, inspect actual visual progress, and retain source/fixture/module pre/post hashes and terminal cleanup receipt. Passing these renderer tests removes the known rejection; it does not prove race entry, controls, audio, frame rate, or the absence of a subsequent blocker.