1191680 - Vertical parts of outlined glyphs

Status: UNCONFIRMED

(Core :: SVG, defect)

Description

[ThomasW]

Attachment: broken-outlined-glyphs.svg

At some zoom levels, some vertical strokes of letters n and f outlined as paths are omitted on Firefox 39.0 and 42.0a1 (Nightly).

I didn't experience this on Windows, just Linux (Ubuntu 14.04).  Other browsers/image viewers seem to have no problems with this situation.

Comment 1

[ThomasW]

Attachment: Screenshot of faulty rendering

Comment 2

[Loic]

Did it use to work in the previous versions of Firefox?

Comment 3

[ThomasW]

I have no idea, just noticed this now. I guess I'd have to set up a VM with an old version to try.

Comment 4

[ThomasW]

O.K., here's some more info. I tried Firefox in both Unity and LXDE deskotp environments on Ubuntu 14.04 as well as with --safe-mode.  I get the faulty behavior there.

I also tried in a Lubuntu 14.04 VirtualBox VM and rendering was as expected for both Firefox 39 and 40.  Maybe this has something to do with the graphics card/driver, so here are the respective outputs of lshw -c video:


Faulty rendering:

  *-display               
       description: VGA compatible controller
       product: 2nd Generation Core Processor Family Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:46 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:5000(size=64)


Correct rendering:

  *-display UNCLAIMED     
       description: VGA compatible controller
       product: VirtualBox Graphics Adapter
       vendor: InnoTek Systemberatung GmbH
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 00
       width: 32 bits
       clock: 33MHz
       capabilities: vga_controller bus_master
       configuration: latency=0
       resources: memory:e0000000-e0ffffff


Anything else I can do to narrow down the problem?

Comment 5

[Loic]

Could you type about:support in the locatin bar and copy here the section "graphics".

Comment 6

[ThomasW]

Adapter Description               Intel Open Source Technology Center -- 
                                  Mesa DRI Intel(R) Sandybridge Mobile
Asynchronous Pan/Zoom             none
Device ID                         Mesa DRI Intel(R) Sandybridge Mobile
Driver Version                    3.0 Mesa 10.1.3
GPU Accelerated Windows           0/1 Basic (OMTC)
Supports Hardware H264 Decoding   false
Vendor ID                         Intel Open Source Technology Center
WebGL Renderer                    Intel Open Source Technology Center -- 
                                  Mesa DRI Intel(R) Sandybridge Mobile
windowLayerManagerRemote          true
AzureCanvasBackend                cairo
AzureContentBackend               cairo
AzureFallbackCanvasBackend        none
AzureSkiaAccelerated              0