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4grayandClaude Fable 5.1
4c6540679d
* perf(workspace): paint the content area's rounded corner instead of clipping it
The `border-radius: 16px 0 0 0` on the scrolling content area made Blink
clip every composited effect inside it (the rail chevrons' and hero
controls' backdrop filters, running transform animations, isolated
groups) through a mask layer synthesized per effect: its shader path
for rounded clips needs four equal radii on macOS and a translation-only
transform between the clip and the effect, and the fallback mask is the
size of the whole clipped area, about 24 MB of tile memory at 2x on a
16" display. Twelve of them put the dashboard at 537-655 MB of tile
memory against Chromium's 512 MB budget ("tile memory limits exceeded",
blank tiles while scrolling).
The scroller now sits in a frame that carries the radius and the shadow
without clipping; the scroller clips to a rectangle and is a stacking
context; a 16px corner piece on the frame paints the notch in the body
colour. Dashboard tile memory (1728x1000 window at 2x, Xtream mock):
idle 537 -> 242 MB, slide switch 598 -> 303 MB, scrolling 655 -> 165 MB;
movie detail 110 -> 89 MB, series detail 187 -> 143 MB. The new
Electron E2E asserts that no element-less drawing layer spans half the
content area (eight did before).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
* test(e2e): identify synthesized clip masks by missing owner node and reasons
A content layer's owner node is also missing when its first paint chunk
belongs to an anonymous box (the rail track and the content scroller
flipped between runs), so the dashboard compositing check now requires
both: no owner node and no compositing reason, which only a synthesized
mask has. It also waits for Blink's layer debug info to be filled after
enabling the LayerTree domain, and asserts that the backdrop-filtered
controls really are composited layers, so the mask check cannot pass
vacuously. Verified under `--disable-gpu` as well: the old scroller
radius still produces seven masks there, the fix none.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>