Added fix for mozbz#1634213

firefox.spec

@@ -118,7 +118,7 @@ ExcludeArch: s390x
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
 Version:        76.0.1
-Release:        5%{?nss_tag}%{?dist}
+Release:        6%{?nss_tag}%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Source0:        https://archive.mozilla.org/pub/firefox/releases/%{version}%{?pre_version}/source/firefox-%{version}%{?pre_version}.source.tar.xz
@@ -199,6 +199,7 @@ Patch585:        firefox-vaapi-extra-frames.patch
 Patch586:        mozilla-1619882-1.patch
 Patch587:        mozilla-1619882-2.patch
 Patch588:        mozilla-1619882-3.patch
+Patch589:        mozilla-1634213.patch
 
 # PGO/LTO patches
 Patch600:        pgo.patch
@@ -415,6 +416,7 @@ This package contains results of tests executed during build.
 %patch586 -p1 -b .mozilla-1619882-1
 %patch587 -p1 -b .mozilla-1619882-2
 %patch588 -p1 -b .mozilla-1619882-3
+%patch589 -p1 -b .mozilla-1634213
 
 # PGO patches
 %patch600 -p1 -b .pgo
@@ -989,6 +991,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
+* Mon May 25 2020 Martin Stransky <stransky@redhat.com> - 76.0.1-6
+- Added fix for mozbz#1634213
+
 * Mon May 25 2020 Martin Stransky <stransky@redhat.com> - 76.0.1-5
 - Added fix for mozbz#1619882 - video flickering when va-api is used.
 

mozilla-1634213.patch

@@ -0,0 +1,96 @@
+diff --git a/gfx/gl/GLScreenBuffer.cpp b/gfx/gl/GLScreenBuffer.cpp
+--- a/gfx/gl/GLScreenBuffer.cpp
++++ b/gfx/gl/GLScreenBuffer.cpp
+@@ -88,10 +88,14 @@
+ #if defined(XP_MACOSX)
+     factory = SurfaceFactory_IOSurface::Create(gl, caps, ipcChannel, flags);
+ #elif defined(MOZ_WAYLAND)
+-    if (gl->GetContextType() == GLContextType::EGL) {
+-      if (gfxPlatformGtk::GetPlatform()->UseWaylandDMABufWebGL()) {
+-        factory =
+-            MakeUnique<SurfaceFactory_DMABUF>(gl, caps, ipcChannel, flags);
++    if (gl->GetContextType() == GLContextType::EGL &&
++        gfxPlatformGtk::GetPlatform()->UseWaylandDMABufWebGL()) {
++      auto DMABUFFactory =
++          MakeUnique<SurfaceFactory_DMABUF>(gl, caps, ipcChannel, flags);
++      if (DMABUFFactory && DMABUFFactory->CanCreateSurface()) {
++        factory = std::move(DMABUFFactory);
++      } else {
++        gfxPlatformGtk::GetPlatform()->DisableWaylandDMABufWebGL();
+       }
+     }
+ #elif defined(MOZ_X11)
+diff --git a/gfx/gl/SharedSurfaceDMABUF.h b/gfx/gl/SharedSurfaceDMABUF.h
+--- a/gfx/gl/SharedSurfaceDMABUF.h
++++ b/gfx/gl/SharedSurfaceDMABUF.h
+@@ -71,6 +71,11 @@
+     bool hasAlpha = mReadCaps.alpha;
+     return SharedSurface_DMABUF::Create(mGL, mFormats, size, hasAlpha);
+   }
++
++  bool CanCreateSurface() {
++    UniquePtr<SharedSurface> test = CreateShared(gfx::IntSize(1, 1));
++    return test != nullptr;
++  }
+ };
+ 
+ }  // namespace gl
+diff --git a/gfx/thebes/gfxPlatformGtk.h b/gfx/thebes/gfxPlatformGtk.h
+--- a/gfx/thebes/gfxPlatformGtk.h
++++ b/gfx/thebes/gfxPlatformGtk.h
+@@ -88,7 +88,8 @@
+ 
+ #ifdef MOZ_WAYLAND
+   bool UseWaylandDMABufTextures();
+-  bool UseWaylandDMABufWebGL();
++  bool UseWaylandDMABufWebGL() { return mUseWebGLDmabufBackend; }
++  void DisableWaylandDMABufWebGL() { mUseWebGLDmabufBackend = false; }
+   bool UseWaylandHardwareVideoDecoding();
+ #endif
+ 
+@@ -110,6 +111,9 @@
+ #ifdef MOZ_X11
+   Display* mCompositorDisplay;
+ #endif
++#ifdef MOZ_WAYLAND
++  bool mUseWebGLDmabufBackend;
++#endif
+ };
+ 
+ #endif /* GFX_PLATFORM_GTK_H */
+diff --git a/gfx/thebes/gfxPlatformGtk.cpp b/gfx/thebes/gfxPlatformGtk.cpp
+--- a/gfx/thebes/gfxPlatformGtk.cpp
++++ b/gfx/thebes/gfxPlatformGtk.cpp
+@@ -116,6 +116,9 @@
+ 
+   Factory::ReleaseFTLibrary(gPlatformFTLibrary);
+   gPlatformFTLibrary = nullptr;
++
++  mUseWebGLDmabufBackend =
++      IsWaylandDisplay() && nsWaylandDisplay::IsDMABufWebGLEnabled();
+ }
+ 
+ void gfxPlatformGtk::FlushContentDrawing() {
+@@ -725,9 +728,6 @@
+ bool gfxPlatformGtk::UseWaylandDMABufTextures() {
+   return IsWaylandDisplay() && nsWaylandDisplay::IsDMABufTexturesEnabled();
+ }
+-bool gfxPlatformGtk::UseWaylandDMABufWebGL() {
+-  return IsWaylandDisplay() && nsWaylandDisplay::IsDMABufWebGLEnabled();
+-}
+ bool gfxPlatformGtk::UseWaylandHardwareVideoDecoding() {
+   return IsWaylandDisplay() && nsWaylandDisplay::IsDMABufVAAPIEnabled() &&
+          gfxPlatform::CanUseHardwareVideoDecoding();
+diff --git a/modules/libpref/init/StaticPrefList.yaml b/modules/libpref/init/StaticPrefList.yaml
+--- a/modules/libpref/init/StaticPrefList.yaml
++++ b/modules/libpref/init/StaticPrefList.yaml
+@@ -9111,7 +9111,7 @@
+ # Use DMABuf backend for WebGL on Wayland.
+ - name: widget.wayland-dmabuf-webgl.enabled
+   type: RelaxedAtomicBool
+-  value: false
++  value: true
+   mirror: always
+ 
+ # Use VA-API for video playback on Wayland.
+