Created attachment 698108 [details] screenshot demonstrating wrong rgba-order in firefox Description of problem: My lcd screen has bgr ordering of the pixels. When activating bgr subpixel rendering with the dconf-editor, Gnome applications render fonts correctly but firefox sticks to rgb ordering. (See screenshot.) Version-Release number of selected component (if applicable): Firefox: 18.0.2 How reproducible: always Steps to Reproduce: 1. Use dconf-editor to set the following keys "org.gnome.settings-daemon.plugins.xsettings" "hinting full" "org.gnome.settings-daemon.plugins.xsettings" "antialiasing" "rgba" "org.gnome.settings-daemon.plugins.xsettings" "rgba-order" "bgr" 2. Open firefox and take a screenshot 3. Open the screenshot in the gimp and zoom in to 16x. Actual results: The wrong order can be noticed by the red edges on the left and the blue edges on the right of text, e.g. in the menu bar. Without magnification, this limits the readability of fonts in firefox. Expected results: There should be blue edges on the left and red on the right of text. This can be found in the window title bar where gnome controls the font rendering. Additional info: a screenshot showing firefox and a gtk application with wrong and right ordering, respectively.
Firefox still runs as a GTK2 application...does this settings affect other gtk2 apps? Like Open Office or so?
Anyway, can you test a binary package from upstream? (from mozilla.com)
Sorry for the late feedback. It works properly in openoffice. The upstream firefox packages just uses grayscale font-smoothing. (Two screenshots will be attached.)
Created attachment 704549 [details] Openoffice test Proper bgr font rendering
Created attachment 704550 [details] Test with upstream firefox grayscale font smoothing
I guess it's because org.gnome.settings-daemon.plugins.xsettings is ignored by gtk_init() which comes from gtk2. So we may need to set it by hand untill gtk3 firefox is ready. https://developer.gnome.org/gtk3/unstable/GtkSettings.html#GtkSettings--gtk-xft-rgba
Which system do you run, screen resolution and so? Can you reproduce it in fallback mode too? Which video driver do you have? Because I'm unable to reproduce it on Fedora 18.
Do you have any special settings? Like dpi, font settings/sizes or so?
Anyway, my stock Firefox from Fedora 18 uses grayscale font smoothing (as well as the rest of whole desktop). The "org.gnome.settings-daemon.plugins.xsettings" does not seem to have any effect...only Psi reflects that.
Please reopen if you have the requested data.
This should be fixed upstream in Firefox 22 https://bugzilla.mozilla.org/show_bug.cgi?id=691661
I just tested firefox 22 (the mozilla binary distribution). It also uses grayscale rendering, no matter what the settings in "org.gnome.settings-daemon.plugins.xsettings" are. As opposed to comment 9, other programs adhere to these settings. wrt comment 9, What is Psi? wrt comment 6, I running fedora 18. This is may graphics card: 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 12) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. Device 7635 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 41 Region 0: Memory at fb800000 (64-bit, non-prefetchable) [size=4M] Region 2: Memory at d0000000 (64-bit, prefetchable) [size=256M] Region 4: I/O ports at cc00 [size=8] Expansion ROM at <unassigned> [disabled] Capabilities: <access denied> Kernel driver in use: i915 No special video drivers were installed. I have a Dell UltrSharp screen with bgr order. The screen resolution is 1280x1024. I have no special font settings or dpi.
Try to disable Preferences/Advanced/General/Browsing/Use hardware acceleration when available. Then restart. This could be related to your GPU.
Just tried disabling hardware acceleration. Still no luck. The results remain the same: - The firefox browser that ships with fedora ignores the "rgba-order" setting and always uses "rgb" for this option when "antialiasing" is set to "rgba". - Firefox 22, as downloaded from mozilla.org, also ignores the "antialiasing" setting and always uses "grayscale".
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