We really want to remove font-kit from dep tree, so this is the first
step into removing raqote from servo. While vello_cpu is not perfect
replacement, I am confident that we will resolve all issues eventually:
https://github.com/servo/servo/issues/38345 (most important ones already
have PRs).
Reviewable per commit.
Testing: Existing WPT tests.
Try run: https://github.com/sagudev/servo/actions/runs/17138369290
---------
Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
vello_cpu does not have any tests timeouts, because we do not need
download stuff from GPU as all work happens on CPU. So performance wise
it's better then classic vello at least for our usecase. There are some
vello bugs, but I think we will be able to sort them out within
upstream, eventually. Interestingly enough there are no new PASS like
they were with classic vello.
Difference with raqote can be observed here:
https://github.com/sagudev/servo/actions/runs/16549241085/attempts/1#summary-46802486798
## Known vello problems:
- https://github.com/linebender/vello/issues/1119
- https://github.com/linebender/vello/issues/1056
-
`/html/canvas/element/fill-and-stroke-styles/2d.gradient.interpolate.coloralpha.html`
- `kurbo::Cap::Butt` is defect (only visible with big lineWidth)
https://github.com/linebender/vello/issues/1063
- `/html/canvas/element/line-styles/2d.line.cross.html`
- `/html/canvas/element/line-styles/2d.line.miter.acute.html`
- other lack of strong correct problems
(https://github.com/linebender/vello/issues/1063#issuecomment-2998084736):
- `/html/canvas/element/path-objects/2d.path.rect.selfintersect.html`
- `putImageData(getImageData(...), ...)` is lossy (precision problems,
might be due to ImageData being unmultiplied)
-
`/html/canvas/element/pixel-manipulation/2d.imageData.put.unchanged.html`
Testing: Tested using vello_cpu_canvas subsuite
---------
Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
