Visual evidence: record #1437 column plot rectangle defect

[developer0hye]

Summary

• add a 300 DPI matched wide-chart crop comparing native PowerPoint with current office2pdf output
• isolate the automatic column-chart vertical plot rectangle that makes the tallest bar 34.268pt too short for issue PPTX column charts use an uncalibrated automatic vertical plot rectangle #1437

Related issue

Documents #1437

Testing

• inspected the full page 8 GT/output renders, 5% fuzz diff, and the matched wide-chart crop
• measured native tallest-bar top/baseline/height at 302.793pt, 463.965pt, and 161.172pt versus output 323.456pt, 450.360pt, and 126.904pt
• verified compare.jpg is 6800x1200 with equal 3400px panels, progressive JPEG quality 86, stripped metadata, and 300 DPI JFIF density
• 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 automatic plot-rectangle issue; rendering code is unchanged.

Visual audit

• Issue: PPTX column charts use an uncalibrated automatic vertical plot rectangle #1437
• 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: PPTX multi-entry right legends use a fixed 14pt row pitch #1434, PPTX column-chart right legends center 9.2pt too low #1435, PPTX column-chart right legends are right-fitted 11pt too far left #1436, PPTX column-chart right legend keys are 0.56pt too large #1439
• Model vision findings: The output plot on the right starts 20.663pt lower and ends 13.605pt higher than the native plot on the left, shortening the bar extent by 34.268pt (PPTX column charts use an uncalibrated automatic vertical plot rectangle #1437). The same crop exposes independently tracked legend row pitch, vertical center, horizontal placement, and key-size defects (PPTX multi-entry right legends use a fixed 14pt row pitch #1434-PPTX column-chart right legends are right-fitted 11pt too far left #1436, PPTX column-chart right legend keys are 0.56pt too large #1439), plus the chart-title style difference PPTX chart titles drop rich-text weight and color #1424. The slide-title rule and bar fills match; remaining gridline displacement follows the plot rectangle.
• Compare: assets/bugfixes/issue-1437/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 compare_layout.py --audit and dispositioned every large text-instance shift
• 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: compared page 8 in source order
Element presence	Matches GT: all chart series and legend entries are present
Position/size	Remaining: #1435, #1436, #1437, #1439
Rotation/flip	No deviation observed
Fill	Matches GT
Stroke/border	Remaining: #1437 gridline positions follow the plot rectangle
Shape outline geometry	Remaining: #1437, #1439
Text content	Matches GT
Font family/weight/style	Remaining: #1424
Text color	Remaining: #1424
Alignment	Remaining: #1435, #1436
Line/paragraph spacing	Remaining: #1434
Clipping/overflow	No deviation observed

Checklist

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