Platform/GFX/2011-August-22

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Minutes:

  • GL layers on X11 (mattwoodrow)
    • Landed, backed out because of a performance regression.
    • texture_from_pixmap - glXBindTexImageEXT is causing huge allocations (Bug 680817).
    • Bas asks: Why are we only noticing this now?
      • Answer: We were more concerned about correctness. Just didn't look.
    • Matt to find some easy way to reproduce this performance regression and send it to Jeff, others for testing.
    • Matt asks: Is there anyone we can contact at nvidia about this?
      • bjacob says yes - we do have various contacts.
  • WebGL conformance test suite upgrade and status (bjacob)
    • Tried to land it twice, and it has bounced.
    • Current status: no oranges in the WebGL test suite itself, but when you run it, you get oranges (mostly timeouts) in subsequent mochitests.
    • Maybe the WebGL mochitest is using too much memory?
    • Other issues: some Linux test slaves seemingly don't have OES_float_textures?! Possibly wrong version of driver?
    • Filed tracking bug for WebGL conformance test failures: bug webgl-conformance
  • mobile fonts (gal)
    • bug 674909 - we are using synthetic bolding on some devices which apparently lack bold fonts for some faces, which makes bold text look terrible
    • some discussion about various options; further discussion to happen on the bug and/or offline
  • Status of Test Pilot font survey (nattokirai)
    • the survey conversion is ready, but Jono's worried about the size of responses (e.g. images) going back to the server
    • We might send images individually rather than in a batch, and we might also send users only a subset of the questions.
    • Only needs Firefox 6. We're still trying to resolve a couple of bugs before it can be used, though.
  • GL Layers on Android (ajuma, benwa)
    • https://wiki.mozilla.org/Platform/GFX/GLLayersOnMobile
    • Patches close to landing:
      • Scrolling - Landed but backed out unnecessarily, now non trivial bit rot
      • Orientation change + black flashes and black screen on resume - waiting for re-review
      • URL Bar + surface resize - r+ and green tryserver, will land tonight
    • Next issues:
      • Profiling
      • Context lost
        • We have some reports of lost contexts, but we don't know of any particular steps to reproduce. Some common ones don't seem to cause a context loss.
        • The Android documentation specifically calls out device sleep, but we haven't been able to reproduce that yet.
      • zooming - Slight black flash + artifacts
        • Sadly, not fixed by BenWa's scrolling patch :(
      • reftest - Tegra board received + setup
      • Need to get initial Talos perf numbers so we know whether we're causing any issues that will get us backed out.
      • Chris Jones also suggests we start getting people to turn on OpenGL-accelerated compositing on their devices and get more bug reports.
    • JP has some links for performance tests, specifically some Labs tools:
  • WebGL Antialiasing (jgilbert)
    • There's still a hard crash in one of the tests on Windows, but only with WGL.
    • Suggestion: only allow antialiasing using ANGLE, and fix WGL later.
    • Bas has a question: how are we selecting the antialiasing mode?
      • jgilbert has a reply: we always use the highest antialiasing mode available. Bas has some concerns that this could hurt on slower hardware.
      • bjacob says that Chrome does 4x multisampling an we should do the same.
    • Should land now, minus WGL, and have a pref to disable AA so that we can easily turn it off.
      • Bas suggests it be an integer between 0 and 8 to control the AA sample rate.
  • Cairo for FF7 (jprmc)
    • Did we find any bugs since last week?
      • No.
    • Everything nommed for beta?
      • Yes.
    • So there continues to be no reason to back out the Cairo update.
  • Azure for FF7 (jprmc)
    • No reason to turn off.
    • Maybe want to transplant the moz-opaque ClearType support changeset on to Aurora, though it's not a high priority.
  • Assorted bugs needing traction/info
    • bug 675383 - regression from GDI_CLASSIC for certain font families; roc, jfkthame, or Bas could look at this. Bas to own making sure jfkthame looks at this.
    • bug 591358 - mattwoodrow to take a look?
    • bug 671428 - does this one need to be pushed to aurora/beta? Yes, and it will be nominated.
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