From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- gfx/docs/LayersHistory.rst | 63 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 gfx/docs/LayersHistory.rst (limited to 'gfx/docs/LayersHistory.rst') diff --git a/gfx/docs/LayersHistory.rst b/gfx/docs/LayersHistory.rst new file mode 100644 index 0000000000..360df9b37d --- /dev/null +++ b/gfx/docs/LayersHistory.rst @@ -0,0 +1,63 @@ +Layers History +============== + +This is an overview of the major events in the history of our Layers +infrastructure. + +- iPhone released in July 2007 (Built on a toolkit called LayerKit) + +- Core Animation (October 2007) LayerKit was publicly renamed to OS X + 10.5 + +- Webkit CSS 3d transforms (July 2009) + +- Original layers API (March 2010) Introduced the idea of a layer + manager that would composite. One of the first use cases for this was + hardware accelerated YUV conversion for video. + +- Retained layers (July 7 2010 - Bug 564991) This was an important + concept that introduced the idea of persisting the layer content + across paints in gecko controlled buffers instead of just by the OS. + This introduced the concept of buffer rotation to deal with scrolling + instead of using the native scrolling APIs like ScrollWindowEx + +- Layers IPC (July 2010 - Bug 570294) This introduced shadow layers and + edit lists and was originally done for e10s v1 + +- 3D transforms (September 2011 - Bug 505115) + +- OMTC (December 2011 - Bug 711168) This was prototyped on OS X but + shipped first for Fennec + +- Tiling v1 (April 2012 - Bug 739679) Originally done for Fennec. This + was done to avoid situations where we had to do a bunch of work for + scrolling a small amount. i.e. buffer rotation. It allowed us to have + a variety of interesting features like progressive painting and lower + resolution painting. + +- C++ Async pan zoom controller (July 2012 - Bug 750974) The existing + APZ code was in Java for Fennec so this was reimplemented. + +- Streaming WebGL Buffers (February 2013 - Bug 716859) Infrastructure + to allow OMTC WebGL and avoid the need to glFinish() every frame. + +- Compositor API (April 2013 - Bug 825928) The planning for this + started around November 2012. Layers refactoring created a compositor + API that abstracted away the differences between the D3D vs OpenGL. + The main piece of API is DrawQuad. + +- Tiling v2 (Mar 7 2014 - Bug 963073) Tiling for B2G. This work is + mainly porting tiled layers to new textures, implementing + double-buffered tiles and implementing a texture client pool, to be + used by tiled content clients. + + A large motivation for the pool was the very slow performance of + allocating tiles because of the sync messages to the compositor. + + The slow performance of allocating was directly addressed by bug 959089 + which allowed us to allocate gralloc buffers without sync messages to + the compositor thread. + +- B2G WebGL performance (May 2014 - Bug 1006957, 1001417, 1024144) This + work improved the synchronization mechanism between the compositor + and the producer. -- cgit v1.2.3