# Transform model

SVG transform functions are parsed without changing order: `matrix`,
`translate`, `scale`, `rotate` (with optional center), `skewX` and `skewY`.
The inspector shows each selected/ancestor source transform, accumulated matrix,
determinant/invertibility diagnostics and the candidate matrix.

A draft combines translate, origin, rotate, scale and skew. It affects only the
iframe/overlay until Apply. The proposed source and rendering are shown before
one revision-checked transaction; undo restores the exact pre-apply text.

## Bake support

| Element               | Supported result                                                                                            |
| --------------------- | ----------------------------------------------------------------------------------------------------------- |
| `path`                | all segment points transformed; arcs retained for safe conformal cases or converted/disclosed when required |
| `line`                | transformed endpoints, remains `line`                                                                       |
| `polyline`, `polygon` | transformed point list, same element                                                                        |
| `rect`                | remains `rect` for axis-aligned safe cases; otherwise candidate path                                        |
| `circle`              | remains circle under conformal scale; otherwise explicit ellipse/path as required                           |
| `ellipse`             | remains ellipse for safe axis-aligned cases; otherwise path                                                 |

Numbers remain full precision internally and are serialized with stable bounded
precision only at the explicit operation boundary. Invalid/non-finite geometry,
negative radii and unsupported element types fail before patch creation.

## Policies and limits

- Non-conformal transforms with a visible stroke produce a warning; stroke
  width/vector-effect is not silently rewritten.
- General arc conversion is disclosed in the preview.
- Shared gradients, patterns, markers, filters, masks and clips are indexed but
  not cloned or remapped during bake.
- Text transforms remain attributes; text-to-path is not implemented.
- Group flattening and partial multi-child baking are not implemented.
- Consolidation is available through an appended matrix candidate; a full
  editable transform-list UI/decomposition is future work.

Browser rendering, particularly text and filters, is the visual oracle; the
unit suite checks matrix and geometry invariants but does not claim pixel-perfect
equivalence for every renderer.