196200 2019-03-25 04:02:54 -0700 [Texmap][GStreamer]: Map video frames as early as possible and wait via GL sync meta before using texture ids 2019-06-27 06:46:02 -0700 1 1 1 Unclassified WebKit WebKitGTK WebKit Nightly Build Unspecified Linux REOPENED https://bugs.webkit.org/show_bug.cgi?id=132869 P2 Normal --- 196966 1 vjaquez webkit-unassigned bugs-noreply pnormand zan oldest_to_newest 1520835 0 vjaquez 2019-03-25 04:02:54 -0700 This report is inspired on https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/commit/b5aa304f201d0805de2b33ab97d293654baa12cd?merge_request_iid=156 We should fence [1] the texture to render in its internal GL context, and wait [2] for its rendering in our application GL context, otherwise the GL pipeline could be working on the texture when painting it. 1. https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glFenceSync.xhtml 2. https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glWaitSync.xhtml 1527256 1 vjaquez 2019-04-15 11:02:54 -0700 Well, I guess this enhancement doesn't make much sense since it uses OpenGL API 3.5 while webkitgtk uses 3.0 1546092 2 pnormand 2019-06-19 09:43:27 -0700 Could this be useful for WPE though? 1546466 3 pnormand 2019-06-20 01:20:17 -0700 For EGL there's an equiivalent but it doesn't seem to be supported in GStreamer: https://www.khronos.org/registry/EGL/extensions/KHR/EGL_KHR_fence_sync.txt 1546485 4 vjaquez 2019-06-20 02:48:52 -0700 (In reply to Philippe Normand from comment #3) > For EGL there's an equiivalent but it doesn't seem to be supported in > GStreamer: > > https://www.khronos.org/registry/EGL/extensions/KHR/EGL_KHR_fence_sync.txt If I understand correctly, at least in i915, the implementation is the same for both https://gitlab.freedesktop.org/mesa/mesa/blob/master/src/mesa/drivers/dri/i915/intel_syncobj.c#L30 And in another spec I read that the glFenceSync spec is newer, thus it is expected to cover the EGL usage. 1548467 5 vjaquez 2019-06-27 06:45:40 -0700 Reopening because it's required for other context, specially on EGL.