This reverts commit 5fe4b6faeb.
Reason for revert: relanding with guards
Original change's description:
> Revert "[skottie] Fix text-on-path tracking"
>
> This reverts commit ca973cbea0.
>
> Reason for revert: g3 image diffs
>
> Original change's description:
> > [skottie] Fix text-on-path tracking
> >
> > Tracking and line spacing computations require knowledge of cumulative
> > values for the whole line => we need two passes:
> >
> > 1) compute cumulative values
> > 2) compute per-fragment position adjustments
> >
> > Currently, #1 is implemented in the main onSync() loop (as we iterate
> > to compute fragment props) and #2 is post-applied via adjustLineProps(),
> > after the main loop.
> >
> > The problem is adjustLineProps() is executed after positioning glyphs on
> > path, and tracking is not taken into account for path positioning
> > (instead it moves glyphs horizontally, unrelated to the path).
> >
> > To fix this, we need tracking adjustments to be applied before
> > positioning on path (which is performed in fragmentMatrix()).
> >
> > - move the cumulative tracking computation to a dedicate lambda
> > (compute_linewide_props)
> > - move the fragment position adjustments to the main onSync() loop
> > (that way they participate in path positioning)
> > - to avoid executing the first pass unnecessarily, add flags to detect
> > the presence of tracking and line spacing animators.
> >
> >
> > Change-Id: Ieef2afb53ffe14177eba0ef41dc5c71149cab070
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/518696
> > Reviewed-by: Ben Wagner <bungeman@google.com>
> > Commit-Queue: Florin Malita <fmalita@chromium.org>
> > Commit-Queue: Florin Malita <fmalita@google.com>
>
> Change-Id: Ia99fbb3d7d98eb6a59ff00d796bcc05bc6db63a3
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/519597
> Auto-Submit: Florin Malita <fmalita@google.com>
> Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Change-Id: Ia39602178099d7fa016997f02e1bdf705b16bb2e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/519598
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Florin Malita <fmalita@google.com>
This reverts commit ca973cbea0.
Reason for revert: g3 image diffs
Original change's description:
> [skottie] Fix text-on-path tracking
>
> Tracking and line spacing computations require knowledge of cumulative
> values for the whole line => we need two passes:
>
> 1) compute cumulative values
> 2) compute per-fragment position adjustments
>
> Currently, #1 is implemented in the main onSync() loop (as we iterate
> to compute fragment props) and #2 is post-applied via adjustLineProps(),
> after the main loop.
>
> The problem is adjustLineProps() is executed after positioning glyphs on
> path, and tracking is not taken into account for path positioning
> (instead it moves glyphs horizontally, unrelated to the path).
>
> To fix this, we need tracking adjustments to be applied before
> positioning on path (which is performed in fragmentMatrix()).
>
> - move the cumulative tracking computation to a dedicate lambda
> (compute_linewide_props)
> - move the fragment position adjustments to the main onSync() loop
> (that way they participate in path positioning)
> - to avoid executing the first pass unnecessarily, add flags to detect
> the presence of tracking and line spacing animators.
>
>
> Change-Id: Ieef2afb53ffe14177eba0ef41dc5c71149cab070
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/518696
> Reviewed-by: Ben Wagner <bungeman@google.com>
> Commit-Queue: Florin Malita <fmalita@chromium.org>
> Commit-Queue: Florin Malita <fmalita@google.com>
Change-Id: Ia99fbb3d7d98eb6a59ff00d796bcc05bc6db63a3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/519597
Auto-Submit: Florin Malita <fmalita@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Tracking and line spacing computations require knowledge of cumulative
values for the whole line => we need two passes:
1) compute cumulative values
2) compute per-fragment position adjustments
Currently, #1 is implemented in the main onSync() loop (as we iterate
to compute fragment props) and #2 is post-applied via adjustLineProps(),
after the main loop.
The problem is adjustLineProps() is executed after positioning glyphs on
path, and tracking is not taken into account for path positioning
(instead it moves glyphs horizontally, unrelated to the path).
To fix this, we need tracking adjustments to be applied before
positioning on path (which is performed in fragmentMatrix()).
- move the cumulative tracking computation to a dedicate lambda
(compute_linewide_props)
- move the fragment position adjustments to the main onSync() loop
(that way they participate in path positioning)
- to avoid executing the first pass unnecessarily, add flags to detect
the presence of tracking and line spacing animators.
Change-Id: Ieef2afb53ffe14177eba0ef41dc5c71149cab070
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/518696
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@google.com>
