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Apply root SVG transform after the viewBox mapping - #1085
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A `transform` on the outermost `svg` element is applied in the SVG viewport coordinate system, i.e. after the viewBox-to-viewport mapping, matching Chromium, Firefox and Inkscape. Combine it with the viewBox transform in `convert_doc` (wrapping it) and skip it in `convert_group` for the root `svg`. Fixes linebender#899 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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viewBox mapping
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Fixes #899.
Problem
A
transformon the outermost<svg>combined with aviewBoxrendereddifferently from Chromium/Firefox/Inkscape. resvg applied the transform inside
the viewBox space, clipping content into the corner.
Fix
The
transformon the outermost<svg>is a CSS transform in the SVG viewportcoordinate system, i.e. applied after the viewBox-to-viewport mapping. Combine
it with the viewBox transform in
convert_docso it wraps the viewBox mapping,and skip it in
convert_groupfor the root<svg>to avoid applying it twice.Testing
root_svg_transform_with_viewboxandnested_svg_transform_still_applies.resvgrender tests pass.Generated by Claude
Note: I accidentally closed the original PR (#1068) by deleting my fork, which auto-closed it. This reopens the same change — the branch and commits are unchanged.