text-shadow on fixed positioned elements is rendered incorrect

NEW
Unassigned

Status

()

Core
Layout: View Rendering
6 years ago
6 years ago

People

(Reporter: Chris, Unassigned)

Tracking

5 Branch
x86_64
Windows 7
Points:
---

Firefox Tracking Flags

(Not tracked)

Details

Attachments

(2 attachments)

(Reporter)

Description

6 years ago
Created attachment 553697 [details]
A simple testcase for text-shadow and position:fixed

I applied the text-shadow property (using rgba) to an element within a position:fixed wrapper. As soon as the wrapper is modified somehow with javascript (e.g displaying another container which is a child of the wrapper) the shadow is render incorrect.

To reproduce this problem have a look at the attached testcase. The problem still exists in Nightly 8.0a1 (2011-08-15).

Updated

6 years ago
Attachment #553697 - Attachment mime type: text/plain → text/html

Comment 1

6 years ago
Confirmed on 
http://hg.mozilla.org/mozilla-central/rev/8994b8638803
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0a1) Gecko/20110815 Firefox/8.0a1 ID:20110815030738


Disabled HWA  helps
roc, Timothy, could you take a look?  Sounds like layer issues...
Status: UNCONFIRMED → NEW
Component: Layout: Text → Layout: View Rendering
Ever confirmed: true
QA Contact: layout.fonts-and-text → layout.view-rendering
What is the difference that I'm looking for? I can't see it.
Hmm.  Given comment 1, this could be specific to a particular direct3d version (9 or 10) or direct2d...  Chris, Alice0775, what does your about:support say about graphics stuff?
(Reporter)

Comment 5

6 years ago
Created attachment 555969 [details]
Image of the described text-shadow render bug

Timothy: I've attached a image with a before (upper half) and after (lower half) comparison
(Reporter)

Comment 6

6 years ago
about:support

Application Basics

Name: Firefox
Version: 6.0
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) Gecko/20100101 Firefox/6.0

Graphics

Adapter Description: Intel(R) HD Graphics
Vendor ID: 8086
Device ID: 0042
Adapter RAM: Unknown
Adapter Drivers: igdumd64 igd10umd64 igdumdx32 igd10umd32
Driver Version: 8.15.10.2202
Driver Date: 8-25-2010
Direct2D Enabled: true
DirectWrite Enabled: true (6.1.7601.17514)
ClearType Parameters: Gamma: 2200 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 300
WebGL Renderer: Google Inc. -- ANGLE -- OpenGL ES 2.0 (ANGLE 0.0.0.686)
GPU Accelerated Windows: 1/1 Direct3D 10
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