notices: resvg (pattern rendering, test cases)

The pattern rendering follows resvg's (the tile, its filtering) and
usvg's fix_recursive_patterns; tests/svgs/resvg holds resvg's test
cases. svg.ts's header moves above the imports, so the build keeps it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Lfv41PqHEGbU7SLg5onpG1

Author: matmen

THIRD_PARTY_NOTICES.md

@@ -25,6 +25,7 @@ following projects, under their own licenses. Each derived file says so in its h
 | [Pillow](https://github.com/python-pillow/Pillow) | `src/util/resample.ts` (filter coefficients, box, bilinear and bicubic filters) | MIT-CMU |
 | [HarfBuzz](https://github.com/harfbuzz/harfbuzz) | `src/render/buffer.ts`, `src/render/layout.ts`, `src/render/shape.ts`, `src/render/shapers/*` (OpenType shaping: buffer, GSUB/GPOS, normalization, fallback positioning, the script shapers and syllable grammars), `scripts/unicode.js` (shaping category tables) | Old MIT |
 | [Universal Shaping Engine data](https://github.com/harfbuzz/harfbuzz/tree/main/src/ms-use) by Microsoft | `scripts/ms-use` (category overrides, invalid vowel sequences), the tables generated from them in `src/render/unicode-data.ts` | MIT |
+| [resvg](https://github.com/linebender/resvg) by the Resvg Authors | `src/render/svg.ts` (how patterns are rendered and their reference cycles broken, following resvg and usvg), `tests/svgs/resvg` (test cases with resvg's renderings) | MIT (or Apache-2.0) |
 | [Unicode Character Database](https://www.unicode.org/ucd/) | `src/render/unicode-data.ts` (character properties, generated by `scripts/unicode.js`) | Unicode License v3 |
 
 ## fflate, Fast CRC32 in JavaScript
@@ -489,3 +490,33 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE
 ```
+
+## resvg
+
+```
+Copyright 2017 the Resvg Authors
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+```

src/render/svg.ts

@@ -1,14 +1,17 @@
-import { decode as decodeUTF8 } from '../util/utf8.ts';
-import { PathCommand } from './font.ts';
-
-/**
+/*!
  * SVG renderer supporting a static subset of SVG 1.1/2:
  * shapes, paths, transforms, nested svg/use/symbol, presentation attributes, inline styles and simple
  * <style> sheets (type, class and id selectors), solid colors, linear and radial gradients, patterns, strokes
  * (joins, caps, dashes), opacity, clip paths and luminance masks.
  * Not supported: text, images, filters, markers, animation and scripting.
+ * How patterns are rendered (a tile in device resolution, its filtering) and their reference cycles broken follows
+ * resvg/usvg (https://github.com/linebender/resvg; Copyright 2017 the Resvg Authors, MIT License, see
+ * THIRD_PARTY_NOTICES.md)
  */
 
+import { decode as decodeUTF8 } from '../util/utf8.ts';
+import { PathCommand } from './font.ts';
+
 const UNSUPPORTED = new Set(['text', 'image', 'filter', 'pattern', 'marker', 'foreignObject', 'script', 'style', 'title', 'desc', 'metadata',
     'defs', 'clipPath', 'mask', 'linearGradient', 'radialGradient', 'stop', 'symbol', 'font', 'font-face', 'animate', 'animateTransform', 'animateMotion', 'set']);