[Webkit-unassigned] [Bug 188840] New: webkitgtk+ on ARM doesn't play hardware-accelerated CSS animations

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=188840

            Bug ID: 188840
           Summary: webkitgtk+ on ARM doesn't play hardware-accelerated
                    CSS animations
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: martid0311 at gmail.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 347785

  --> https://bugs.webkit.org/attachment.cgi?id=347785&action=review

Output of glxinfo

Hi,

I'm using WebKitGTK+ on a machine with an ARM CPU. Everything seems to work okay, except that CSS animations which use hardware acceleration (i.e with a 'transform: translateZ(0)' property) just don't run. If I disable hardware acceleration, either by removing translateZ, or by defining WEBKIT_DISABLE_COMPOSITING_MODE=1, the animation plays (albeit choppily). Canvas also doesn't work properly, again unless I disable hardware acceleration.

On my Intel laptop, animations run just fine with hardware acceleration.

The ARM machine uses WebKitGTK+ 2.20.3, compiled from the meta-webkit yocto layer (https://github.com/Igalia/meta-webkit). The hardware is a DART-SD410 from Variscite, running a Snapdragon 410. It's running Linux 4.9.39+linaro. It has a GPU which supports OpenGL, "3.0 Mesa 17.3.8" is the OpenGL version string. Here's the output from glxinfo: https://pastebin.com/mZEMe7Gx. Here's a test page which runs fine with webkitgtk on my Intel laptop, but not with webkitgtk on ARM: https://s.mort.coffee/hwaccel-css (source: https://pastebin.com/2KTALmYW)

Here's a line printed by bitbake when compiling the recipe which includes the build options:
+ cmake -G Ninja -DCMAKE_MAKE_PROGRAM=ninja /data/martin/yocto/build/tmp/work/aarch64-poky-linux/webkitgtk/2.20.3-r0/webkitgtk-2.20.3/ -DCMAKE_INSTALL_PREFIX:PATH=/usr -DCMAKE_INSTALL_BINDIR:PATH=bin -DCMAKE_INSTALL_SBINDIR:PATH=sbin -DCMAKE_INSTALL_LIBEXECDIR:PATH=libexec -DCMAKE_INSTALL_SYSCONFDIR:PATH=/etc -DCMAKE_INSTALL_SHAREDSTATEDIR:PATH=../com -DCMAKE_INSTALL_LOCALSTATEDIR:PATH=/var -DCMAKE_INSTALL_LIBDIR:PATH=lib -DCMAKE_INSTALL_INCLUDEDIR:PATH=include -DCMAKE_INSTALL_DATAROOTDIR:PATH=share -DCMAKE_INSTALL_SO_NO_EXE=0 -DCMAKE_TOOLCHAIN_FILE=/data/martin/yocto/build/tmp/work/aarch64-poky-linux/webkitgtk/2.20.3-r0/toolchain.cmake -DCMAKE_VERBOSE_MAKEFILE=1 -DCMAKE_NO_SYSTEM_FROM_IMPORTED=1 -DPORT=GTK -DCMAKE_BUILD_TYPE=Release -DENABLE_INTROSPECTION=OFF -DENABLE_GTKDOC=OFF -DENABLE_CREDENTIAL_STORAGE=OFF -DENABLE_MINIBROWSER=ON -DENABLE_DRAG_SUPPORT=OFF -DUSE_REDIRECTED_XCOMPOSITE_WINDOW=OFF -DENABLE_SPELLCHECK=OFF -DENABLE_GEOLOCATION=OFF -DENABLE_GLES2=ON -DUSE_GSTREAMER_GL=ON -DENABLE_PLUGIN_PROCESS_GTK2=OFF -DUSE_LIBHYPHEN=OFF -DUSE_LIBNOTIFY=OFF -DUSE_LIBSECRET=OFF -DENABLE_OPENGL=ON -DENABLE_VIDEO=ON -DENABLE_WAYLAND_TARGET=ON -DENABLE_WEB_CRYPTO=ON -DENABLE_WEBGL=ON -DUSE_WOFF2=ON -DENABLE_X11_TARGET=ON -DUSE_LD_GOLD=OFF -Wno-dev

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