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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 "mozilla/layers/LayersMessageUtils.h";
include "mozilla/layers/CanvasTranslator.h";
[MoveOnly] using mozilla::CrossProcessSemaphoreHandle from "mozilla/ipc/CrossProcessSemaphore.h";
using mozilla::layers::TextureType from "mozilla/layers/LayersTypes.h";
[MoveOnly] using mozilla::ipc::SharedMemoryBasic::Handle from "mozilla/ipc/SharedMemoryBasic.h";
namespace mozilla {
namespace layers {
* PCanvas is the IPDL for recorded Canvas drawing.
[NeedsOtherPid, ParentImpl="CanvasTranslator"]
async protocol PCanvas {
* Initialize a CanvasTranslator for a particular TextureType, which
* translates events from a CanvasEventRingBuffer. aReadHandle is the shared
* memory handle for the ring buffer. aReaderSem and aWriterSem are handles
* for the semaphores to handle waiting on either side.
async InitTranslator(TextureType aTextureType, Handle aReadHandle,
CrossProcessSemaphoreHandle aReaderSem,
CrossProcessSemaphoreHandle aWriterSem);
* Used to tell the CanvasTranslator to start translating again after it has
* stopped due to a timeout waiting for events.
async ResumeTranslation();
* Notify that the canvas device used by the translator has changed.
async NotifyDeviceChanged();
* Deactivate remote canvas, which will cause fall back to software.
async Deactivate();
} // layers
} // mozilla