Closed Bug 1841532 Opened 1 year ago Closed 1 year ago

The shadow don't follow mouse movement on a codepen demo (https://codepen.io/andybarefoot/pen/rXqMQe)

Categories

(Core :: Web Painting, defect)

Product:
Core
Component:
Web Painting
Platform:
Desktop
Windows 10
Type:
defect

Tracking

()

Status:
RESOLVED DUPLICATE of bug 1581457
Tracking Flags:
Tracking Status
firefox117 --- affected

People

(Reporter: alice0775, Unassigned)

Details

(Keywords: nightly-community)

Chrome works as expected.

Steps to reproduce:

  1. Open a codepen demo ( https://codepen.io/andybarefoot/pen/rXqMQe )
  2. Turn on Full Page View from codepens toolbar Change View button
  3. Move the mouse pointer in a circular motion over the content.

Actual Results:
The rectangle shadow don't follow the mouse movement.

Expected Results:
The rectangle shadow should follow the mouse movement.

Summary: The shadow don't followed mouse movement on a codepen demo (https://codepen.io/andybarefoot/pen/rXqMQe) → The shadow don't follow mouse movement on a codepen demo (https://codepen.io/andybarefoot/pen/rXqMQe)
Component: DOM: Events → Layout

I can reproduce, though the rendering seems to update when I alt-tab (i.e. switch windows), or if I click-and-drag (e.g. to select text).

Seems like an invalidation/repaint bug of some sort. Likely a bug in our Web Painting code rather than in Layout. The thing that's changing is the perspective-origin CSS property.

Searching bugzilla, it looks like this is exactly what's described in bug 1581457. Sadly a kinda-old bug, it seems.

Status: NEW → RESOLVED
Closed: 1 year ago
Component: Layout → Web Painting
Duplicate of bug: 1581457
Resolution: --- → DUPLICATE
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