1207583 - Font smoothing breaks after scrolling

Status: RESOLVED DUPLICATE of bug 1122916

(Core :: Graphics: Text, defect)

Description

[Andriy Yurchuk]

Attachment: Font after scrolling

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:44.0) Gecko/20100101 Firefox/44.0
Build ID: 20150923030230

Steps to reproduce:

1. Load https://github.com/bramstein/fontloader/blob/master/Gruntfile.js (note how the font the code is printed with looks like)
2. Scroll the page with a touchpad (note how the code font looks like after that)

Application Basics
------------------
Name: Firefox
Version: 44.0a1
Build ID: 20150923030230
Update Channel: nightly
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:44.0) Gecko/20100101 Firefox/44.0
Multiprocess Windows: 1/1 (default: true)
Safe Mode: false

Graphics
--------
Asynchronous Pan/Zoom: wheel input enabled
Device ID: 0x0a26
GPU Accelerated Windows: 1/1 OpenGL (OMTC)
Supports Hardware H264 Decoding: No;
Vendor ID: 0x8086
WebGL Renderer: Intel Inc. -- Intel HD Graphics 5000 OpenGL Engine
windowLayerManagerRemote: true
AzureCanvasBackend: skia
AzureContentBackend: quartz
AzureFallbackCanvasBackend: none
AzureSkiaAccelerated: 0



Actual results:

After touchpad scrolling the font looses its smoothness. This only seems to happen with monospace font and only when scrolling is done with a touchpad (if you scroll the page with a down arrow keyboard key the font stays the same).



Expected results:

The font retains its smoothness after scrolling.

Comment 1

[Andriy Yurchuk]

Attachment: Font before scrolling