Visual evidence: record #1447 line-cap defect

[developer0hye]

Summary

• add a 300 DPI matched title crop comparing native PowerPoint with current office2pdf output
• isolate the native flat title-rule endpoints against office2pdf's rounded endpoints for PPTX open custom-geometry lines render rounded instead of flat caps #1447

Related issue

Documents #1447

Testing

• inspected the full page 8 GT/output renders, the 5% fuzz diff, and the matched title/rule crop at full resolution
• verified the source open custom-geometry line has no cap attribute and therefore uses DrawingML's flat default
• verified compare.jpg is 3000x350 with equal 1500px panels, progressive JPEG quality 86, stripped metadata, and 300 DPI JFIF density
• python3 scripts/check_visual_pr.py evidence validation logic — passed for assets/bugfixes/issue-1447/compare.jpg
• mandatory documentation freshness review: PASS

Visual impact

• No rendered PDF change
• Rendered PDF change or visual evidence added
• Reason: Adds defect evidence for the open line-cap issue; rendering code is unchanged.

Visual audit

• Issue: PPTX open custom-geometry lines render rounded instead of flat caps #1447
• Fixture: PR fix(docx): honor in-cell picture row floors #1407 source PPTX
• Page(s): 8
• Renderer and DPI: pdftoppm, 300 DPI
• Evidence mode: defect
• New follow-up issues found in this audit: None
• Model vision findings: Codex inspected the full GT/output page, 5% diff, and matched title crop at 300 DPI. In the left native panel the teal title rule ends on vertical flat edges, while the right office2pdf panel protrudes into semicircular rounded caps at both ends (PPTX open custom-geometry lines render rounded instead of flat caps #1447). The rule's position, thickness, length, and color otherwise agree at this crop scale. Remaining page-8 differences stay independently tracked as chart-title styling (PPTX chart titles drop rich-text weight and color #1424), legend block placement (PPTX column-chart right legends center 9.2pt too low #1435 and PPTX column-chart right legends are right-fitted 11pt too far left #1436), automatic plot geometry (PPTX column charts use an uncalibrated automatic vertical plot rectangle #1437), and legend-key size (PPTX column-chart right legend keys are 0.56pt too large #1439).
• Compare: assets/bugfixes/issue-1447/compare.jpg

Visual comparison

Compare

Required inspection

• Rendered all evidence at 150 DPI or higher
• Stored progressive JPEG quality 86 assets with metadata stripped
• Used Codex/Claude vision to inspect the full GT/output pages, diff, and matched crops
• Inspected matched region crops at full resolution
• Ran compare_layout.py --audit and dispositioned every large text-instance shift and painted-visibility mismatch
• Ran the 5% fuzz pixel-difference sweep
• Inventoried hairlines and border dash styles
• Inventoried font weight, italic, and underline emphasis

Deviation audit

Check	Result
Page count/order	Matches GT — page 8 is compared in source order
Element presence	Matches GT — the slide title and its rule are present in both panels
Position/size	Remaining: #1435 and #1436 track legend placement, #1437 tracks the plot rectangle, and #1439 tracks legend-key size
Rotation/flip	Matches GT — the title and rule have no differing rotation or flip
Fill	Matches GT — the title and rule colors match; other page fills remain present
Stroke/border	Remaining: #1447 tracks the rounded title-rule caps; its thickness, length, color, and solid dash style otherwise match
Shape outline geometry	Remaining: #1447 tracks the open rule's endpoint geometry and #1439 tracks legend-key square dimensions
Text content	Matches GT — visible page-8 text is unchanged
Font family/weight/style	Remaining: #1424 tracks the chart-title styling; the slide-title emphasis matches GT
Text color	Remaining: #1424 tracks the chart-title color; the slide-title color matches GT
Alignment	Remaining: #1435 and #1436 track legend alignment; the slide title and rule align with GT
Line/paragraph spacing	Matches GT — the title line is unchanged and the legend pitch fix from #1434 remains present
Clipping/overflow	No deviation observed — neither the title nor the rule is clipped

Checklist

• Commits include a Signed-off-by line
• PR scope contains one root cause
• Remaining visual deviations each reference an open issue

[developer0hye]

Closing this evidence-only PR before merge because the #1407 provenance and initial line-cap root-cause claim were incorrect. Issue #1447 remains open with the correction and the evidence branch is retained.