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60 lines
1.7 KiB
Plaintext
60 lines
1.7 KiB
Plaintext
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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include protocol PBrowser;
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include protocol PLayers;
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using mozilla::layers::LayersBackend;
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namespace mozilla {
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namespace layout {
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/**
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* PRenderFrame (in the layout sense of "frame") represents one web
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* "page". It's used to graft content processes' layer trees into
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* chrome's rendering path. The lifetime of a PRenderFrame is tied to
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* its PresShell in the child process.
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*
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* The child process conceptually "owns" a PRenderFrame, because it
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* only makes sense wrt documents loaded by the child.
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*/
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sync protocol PRenderFrame
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{
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manager PBrowser;
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manages PLayers;
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parent:
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/**
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* Shadow layer trees can be grafted into the parent's in one of
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* two ways
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* - direct shadow tree: updates are sent to parent
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* - indirect: the parent holds a reference (ID) to a shadow tree
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* that's managed by the compositor. During composition, the
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* shadow tree is looked up and grafted appropriately
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*
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* |id| is set to 0 in the "direct" case, and to a whole number
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* in the "indirect" case.
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*/
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async PLayers();
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async NotifyCompositorTransaction();
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async __delete__();
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state EMPTY_OR_DIRECT_COMPOSITOR:
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recv PLayers goto HAVE_CONTENT;
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recv NotifyCompositorTransaction goto EMPTY_OR_DIRECT_COMPOSITOR;
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recv __delete__;
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state HAVE_CONTENT:
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recv NotifyCompositorTransaction goto HAVE_CONTENT;
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recv __delete__;
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};
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} // namespace layout
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} // namespace mozilla
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