gecko-dev/gfx/layers/ipc/PImageBridge.ipdl

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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 http://mozilla.org/MPL/2.0/. */
include LayersSurfaces;
include LayersMessages;
include protocol PGrallocBuffer;
include protocol PCompositable;
include protocol PTexture;
include ProtocolTypes;
include "mozilla/GfxMessageUtils.h";
using struct mozilla::layers::TextureInfo from "mozilla/layers/CompositorTypes.h";
namespace mozilla {
namespace layers {
/**
* The PImageBridge protocol is used to allow isolated threads or processes to push
* frames directly to the compositor thread/process without relying on the main thread
* which might be too busy dealing with content script.
*/
intr protocol PImageBridge
{
manages PCompositable;
manages PGrallocBuffer;
manages PTexture;
parent:
sync Update(CompositableOperation[] ops) returns (EditReply[] reply);
async UpdateNoSwap(CompositableOperation[] ops);
// Allocates a gralloc buffer that may not suitable to use with
// gfxImageSurface but allows hardware decoder to write to the
// buffer directly. The format is a enum defined in
// system/graphics.h and the usage is the GraphicBuffer usage
// flag. See GraphicBuffer.h and gralloc.h.
sync PGrallocBuffer(IntSize size, uint32_t format, uint32_t usage)
returns (MaybeMagicGrallocBufferHandle handle);
// First step of the destruction sequence. This puts all the ImageContainerParents
// in a state in which they can't send asynchronous messages to their child
// counterpart so as to not race with the upcomming __delete__ message.
// In the child side, the __delete__ messages are not sent right after Stop,
// they are scheduled in the ImageBridgeChild's message queue in order to ensure
// that all the messages from the parent side have been received and processed
// before sending __delete__.
sync Stop();
sync PCompositable(TextureInfo aInfo) returns (uint64_t id);
async PTexture(SurfaceDescriptor aSharedData, uint32_t aTextureFlags);
};
} // namespace
} // namespace