Add visual regression CI with SwiftShader#2
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- GitHub Actions workflow with 3 jobs: 1. Compare committed D3D11 vs Vulkan reference PNGs (no GPU) 2. Build CaptureVulkan + render with SwiftShader, compare against D3D11 3. Staleness check: warn if Vulkan source changed without reference update - Reference PNGs for 21 test cases (D3D11 + Vulkan, 4 frames each) - compare_reference.py: CI-friendly orchestrator for image comparison - update_reference.py: developer tool to refresh reference images - compare_images.py: added PNG reading support (pure stdlib) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
GitHub Actions windows-latest has VS 2022 Enterprise, not Community. Use vswhere.exe to find the VS installation dynamically, with hardcoded paths as fallback. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The Vulkan property sheet (GFx_Renderer_Vulkan.props) uses $(VK_SDK_PATH) for include/lib paths, but CI only set VULKAN_SDK. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Added -SkipD3D11 flag to build_tests.ps1. CI only needs CaptureVulkan for SwiftShader rendering — D3D11 libs aren't available on the runner. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The SwiftShader job rebuilds Vulkan from source and compares live captures against D3D11 references, making the staleness heuristic redundant. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The SwiftShader capture job builds from source and compares live renders against D3D11 references — no need for a separate static PNG comparison. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
Test plan
compare-referencesjob passes with committed PNGsswiftshader-capturejob builds CaptureVulkan and renders correctlystaleness-checkwarns when Vulkan source changes without reference updateworkflow_dispatchtrigger🤖 Generated with Claude Code