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Platform/GFX/APZ

486 bytes added, 08:55, 22 October 2013
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== AsyncPanZoomControllers ==
Inside the APZ module, every scrollable layer has an [https://mxr.mozilla.org/mozilla-central/source/gfx/layers/ipc/AsyncPanZoomController .h AsyncPanZoomController] (APZC). Scrollable layers roughly correspond to the root document, documents in iframes, and overflow:scroll divs. See [[Platform/GFX/OffMainThreadCompositing|OMTC]] for more information about layers. The APZCs are arranged in a tree whose structure reflects the structure of the layer tree containing the layers that they correspond to, except that the APZC tree only has nodes for scrollable layers, while the layer tree has nodes for all layers. The APZC tree is managed by a class called [https://mxr.mozilla.org/mozilla-central/source/gfx/layers/composite/APZCTreeManager.h APZCTreeManager].
== Main APZ projects on the horizon ==
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