1227125 - Table border rendering artifact when zooming in (border-collapse table layout)

Status: RESOLVED DUPLICATE of bug 410959

(Core :: Layout: Tables, defect)

Description

[John Bunch]

Attachment: Rendering Bug.zip

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0
Build ID: 20151029151421

Steps to reproduce:

Unzip the attached file. Open the folder, Rendering Bug. Double-click Jobs by Owner - StaffMe.net.htm to open in Firefox version 42.0.


Actual results:

At the bottom of the rendered report, below and to both sides of the footer (page numbers), there is a thin black border.


Expected results:

There should be no border around the bottom of the report. Neither Internet Explorer nor Chrome renders this border. Furthermore, the software (an ASP.NET Web page) that rendered the form has been checked, and no border should be drawn around the footer. The ASP.NET platform in use is .NET Framework 4.6, which is up to date at this time.

Comment 1

[Loic]

I don't the see the glitch. Could you attach a screenshot about what you see, please.

Comment 2

[John Bunch]

Attachment: A screenshot of the problem. Note the black border at the bottom of the report.

Comment 3

[John Bunch]

Requested screenshot has been attached.

Comment 4

[Loic]

I'm not able to reproduce it with your testcase and FF42.
Did you test yourself the .htm file in the zip archive instead of the local ASP.net webpage?

Comment 5

[John Bunch]

Yes, I did. I also retested just now as follows:
1. I deleted my original files.
2. I downloaded Rendering Bug.zip from this bug report.
3. I extracted all files from the ZIP file.
4. I went into the Rendering Bug folder just created and opened the .htm file.
5. The report was displayed in Firefox 42.0 for Windows 7 exactly as in the screenshot.

Comment 6

[Simona Badau, Desktop QA]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0
Build ID: 20151125030231

Works fine for me also on Windows 7 and the latest Nightly.

John, could you please let me know if you are still seeing the issue when:
- starting Firefox in safe mode
https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
- starting Firefox with a new profile
https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
- starting Firefox after a reset 
https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems

Comment 7

[Loic]

And a copy of the "graphics" section from about:support too.

Comment 8

[John Bunch]

Starting Firefox with a new profile revealed the problem. In order to display the rendering artifact, it is also necessary to Zoom In by pressing Ctrl-+.

Following is the "graphics" section you requested:

Graphics
Adapter Description	AMD Radeon HD 7470
Adapter Drivers	aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64
Adapter RAM	1024
Asynchronous Pan/Zoom	none
Device ID	0x6778
Direct2D Enabled	true
DirectWrite Enabled	true (6.2.9200.17461)
Driver Date	7-21-2015
Driver Version	15.200.1065.0
GPU #2 Active	false
GPU Accelerated Windows	1/1 Direct3D 11 (OMTC)
Subsys ID	21201028
Supports Hardware H264 Decoding	true
Vendor ID	0x1002
WebGL Renderer	Google Inc. -- ANGLE (AMD Radeon HD 7470 Direct3D11 vs_5_0 ps_5_0)
windowLayerManagerRemote	true
AzureCanvasBackend	direct2d 1.1
AzureContentBackend	direct2d 1.1
AzureFallbackCanvasBackend	cairo
AzureSkiaAccelerated	0

Comment 9

[Simona Badau, Desktop QA]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0
Build ID: 20151202030210
 
After updating to .NET Framework 4.6 - the issue is reproducible for me also when zooming  out --. Used the test case provided in the Description.

Setting the status to NEW.

Comment 10

[Loic]

Attachment: 1227125.htm (reduced testcase)

It's an issue about rendering table border when zooming in.
Surely a dupe.

Comment 11

[Mats Palmgren (inactive)]

See also bug 895096.