53dd6646b2
Root element now creates a stacking context unconditionally. Refactored display list builder to correctly bucket stacking participants into three groups (negative/zero/positive z-index) per Appendix E steps 2/6/7. Fixed z-index:0 elements painting at step 7 instead of step 6, and descendant stacking contexts being trapped inside positioned z-index:auto ancestors instead of participating in the parent stacking context. Added StackingBuckets struct, unified step-6 rendering with tree-order merge by node_id, and 7 unit tests for creates_stacking_context(). Added 6 golden tests (213-218) and 4 integration tests asserting paint-order invariants programmatically. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
8 lines
369 B
Plaintext
8 lines
369 B
Plaintext
DisplayList items=6
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SolidRect rect=(8, 8, 300, 200) color=#d3d3d3
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SolidRect rect=(18, 18, 120, 120) color=#ff0000
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SolidRect rect=(28, 28, 80, 80) color=#ffa500
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Text rect=(28, 29.6, 26.220264, 16) text="High" color=#000000 font_size=16
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SolidRect rect=(58, 58, 120, 120) color=#0000ff
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Text rect=(58, 59.6, 20.910425, 16) text="Mid" color=#000000 font_size=16
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