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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
include protocol PCanvasManager;
include protocol PCompositorBridge;
include LayersSurfaces;
include "mozilla/GfxMessageUtils.h";
include "mozilla/layers/WebRenderMessageUtils.h";
using mozilla::TimeDuration from "mozilla/TimeStamp.h";
using mozilla::CSSToLayoutDeviceScale from "Units.h";
using mozilla::gfx::IntSize from "mozilla/gfx/2D.h";
[MoveOnly] using mozilla::ipc::SharedMemoryBasic::Handle from "mozilla/ipc/SharedMemoryBasic.h";
using mozilla::layers::CompositorOptions from "mozilla/layers/LayersMessageUtils.h";
using mozilla::wr::ExternalImageId from "mozilla/webrender/WebRenderTypes.h";
using mozilla::wr::MemoryReport from "mozilla/webrender/WebRenderTypes.h";
using mozilla::wr::WebRenderError from "mozilla/webrender/WebRenderTypes.h";
using mozilla::layers::SharedSurfacesMemoryReport from "mozilla/layers/SharedSurfacesMemoryReport.h";
namespace mozilla {
namespace layers {
struct WidgetCompositorOptions {
CSSToLayoutDeviceScale scale;
TimeDuration vsyncRate;
CompositorOptions options;
bool useExternalSurfaceSize;
IntSize surfaceSize;
uint64_t innerWindowId;
struct ContentCompositorOptions {
struct SameProcessWidgetCompositorOptions {
union CompositorBridgeOptions {
* The PCompositorManager protocol is the top-level protocol between the
* compositor thread and the creators of compositors. It exists in the
* following conditions:
* - One PCompositorManager between the GPU process and each content process.
* If the GPU/UI processes are combined, there is one PCompositorManager
* between the combined GPU/UI process and each content process.
* - One PCompositorManager between the GPU process and the UI process. If
* they are combined, there is still one PCompositorManager, but both the
* child and parent live in the same process.
* The intention for this protocol is to facilitate communication with the
* compositor thread for compositor data that is only shared once, rather than
* per PCompositorBridge instance.
[NeedsOtherPid, ParentProc=compositor, ChildProc=anydom]
sync protocol PCompositorManager
manages PCompositorBridge;
* There are three variants of a PCompositorBridge protocol, each of which can
* only be created by certain processes and configurations:
* - A "content" PCompositorBridge is requested by each content process,
* representing the drawable area for Web content.
* - A "widget" PCompositorBridge is requested by the UI process for each
* "top level browser window" for chrome and such.
* - A "same process widget" PCompositorBridge is requested by the combined
* GPU/UI process for each "top level browser window" as above.
* See gfx/layers/ipc/PCompositorBridge.ipdl for more details.
async PCompositorBridge(CompositorBridgeOptions options);
async AddSharedSurface(ExternalImageId aId, SurfaceDescriptorShared aDesc);
async RemoveSharedSurface(ExternalImageId aId);
async ReportSharedSurfacesMemory() returns (SharedSurfacesMemoryReport aReport);
async NotifyMemoryPressure();
async ReportMemory() returns (MemoryReport aReport);
async InitCanvasManager(Endpoint<PCanvasManagerParent> endpoint);
async NotifyWebRenderError(WebRenderError error);
} // layers
} // mozilla