TPEGFX/2017-Q1

GFX Topics(from high to low priority)

• gfx Stability
• Quantum Rendering
• Canvas 2D perf(google sheet/streaming)
• DisplayList(layout related work)
• Paint correctness(buglist)
• Any layout works, ex: perf/CSS properties

Goal

Ethan Lin

• nsDisplayBorder conversion
  • Enable more border properties (radius, color)
  • Testing
    • Turn on pref for some reftest
  • Debug Tool
    • Identify which layer is converted layer (not PaintedLayer)
• DisplayItem conversion perf
  • Simplify properties conversion
    • gfx:Rect -> WRRect -> WrRect
  • memory usage/memory copy/IPC cost when there are lots of displayitems
  • Convert other items
• Import ContentClient to WebRenderPaintedLayer
  • Import SingleTiledContentClient first
  • Rotation Buffer - Need to push two sub rect to WR

Jerry Shih

• WR external image
  • update compositable, textureHost and textureSource for new WR thread model(WR render and WR backend are not at IPC receiver thread)
  • handle shmem in WR(upload to gl texture in WR)
  • support subimage for wr add_image api
  • support GL_IOSurface ( https://github.com/servo/webrender/issues/642 )
• WR software backend
  • TBD
• Performance and memory usage comparison
  • compare the current gecko and the WR with all WRImageLayer for gallery-like page.

Morris Tseng

• Canvas support
  • Using CanvasClient for canvas
  • Share MacIOSurface
    • WebRender need handle TextureRect in shader. (texture coordinate, shader code...etc)
  • Share ANGLE surface
    • Need to investigate how to translate DXGI to angle gl texture.
  • Handle y-flip
  • Handle surface format (e.g RGBA and RGBX)

• Convert nsDisplayBullet
  • Create BulletLayer
  • Send Bullet attributes to webrender
  • Quote from https://public.etherpad-mozilla.org/p/wr-plan#lineNumber=185
    • Supports disc, circle, square, disclosure triangle and image.
    • disc, circle and square are drawn as glyphs -> text item
    • disclosure triangle is a triange path that is filled -> path item
    • image -> image item

Peter Chang

• OMTA
  • dispatch animation/animationdata
  • Works in compositor side
    • save animation data based on related div(or containerlayer)
    • sampling animation during composition
    • replay framedata to WR with new animation
    • Add support to Webrender(opacity and scaling)
  • Support OMTA testing flow

   The followings related to testing of OMTA
   nsDOMWindowUtils::GetOMTAStyle()
   SetTestSampleTime()
   LeaveTestMode()

open qusetion

Ethan

 disable fallback for reftest
 share the same mapping between c++/rust by code generator

 evaluate displayitem conversion performance/memory usage

Morris

 how to support image layer more efficiently(similar to jerry's question?)

Jerry

 image resource lifetime problem

peter

omta always repaint all pixel in WR