1153957 - [e10s] Text rendered with grayscale instead of sub-pixel anti-aliasing

Status: RESOLVED DUPLICATE of bug 1172014

(Core :: Graphics: Text, defect)

Description

[Alice0775 White]

Attachment: screenshot (400% zoomed comparison between e10s and non-e10s)

This happens with newly created profile.

Steps to reproduce:
1. Open http://www.reddit.com/r/DaystromInstitute/ in e10s
2. Open http://www.reddit.com/r/DaystromInstitute/ in non-e10s
3. Compere them

Actual Result:
Text rendered with grayscale AA on e10s browser
Text rendered with sub-pixel AA on non-e10s browser

Expected Results:
Text should render with sub-pixel AA on e10s browser

Comment 1

[Alice0775 White]

Graphics
--------

Adapter Description: AMD Radeon HD 6450
Adapter Drivers: aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64
Adapter RAM: 1024
Asynchronous Pan/Zoom: none
ClearType Parameters: Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 200
Device ID: 0x6779
Direct2D Enabled: true
DirectWrite Enabled: true (6.2.9200.16571)
Driver Date: 11-20-2014
Driver Version: 14.501.1003.0
GPU #2 Active: false
GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC)
Subsys ID: 23111787
Vendor ID: 0x1002
WebGL Renderer: Google Inc. -- ANGLE (AMD Radeon HD 6450 Direct3D11 vs_5_0 ps_5_0)
windowLayerManagerRemote: true
AzureCanvasBackend: direct2d 1.1
AzureContentBackend: direct2d 1.1
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0

Comment 2

[Alice0775 White]

Attachment: testcase html

Comment 3

[Alice0775 White]

Pushlog:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=4d6d69f0f499&tochange=d0fc7202b4cb

Comment 4

[Alice0775 White]

Via local build,
Last Good: 9de7f61c40cc
First Bad: 10e5dd951795

Triggered by: 10e5dd951795	Markus Stange — Bug 1148855 - Rework how display items are assigned to PaintedLayers and make it work the same way with and without APZ. r=roc

Comment 5

[Markus Stange [:mstange]]

Alice, can you still reproduce this? I was going to look at it today but both the testcase and the original page don't show the problem (anymore?) for me.
I think I tested this when you filed the bug originally and was able to reproduce it at the time. So maybe something has landed in the meantime that has fixed it.

Comment 6

[Alice0775 White]

I tested with latest Nightly.
But, I can still reproduce the problem on both original page and the testcase.
Enable e10s(default): Grayscale AA
Disable e10s(from option and restart): Sub-pixel AA


https://hg.mozilla.org/mozilla-central/rev/c6bbf8f1b02b
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0 ID:20150526030202

Comment 7

[Markus Stange [:mstange]]

All right, thanks!

Comment 8

[George Wright (:gw280) (needinfo me!)]

We think this may be fixed by bug 1172014. That patch hasn't landed yet, but we should re-test this when it lands.

Comment 9

[Brad Lassey [:blassey] (use needinfo?)]

Markus, any update here?

Comment 10

[Markus Stange [:mstange]]

Nope, still haven't been able to reproduce this on OS X. That makes it very likely that it will indeed be fixed by bug 1172014.

Comment 11

[Brad Lassey [:blassey] (use needinfo?)]

Markus, any update?

Comment 12

[Markus Stange [:mstange]]

I'm not working on this because I'm quite certain that this is bug 1172014.

Unassigning myself and duping over to bug 1172014.