/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "WebRenderCanvasRenderer.h"

#include "GLContext.h"
#include "GLScreenBuffer.h"
#include "mozilla/layers/CompositorBridgeChild.h"
#include "SharedSurfaceGL.h"
#include "WebRenderBridgeChild.h"
#include "WebRenderLayerManager.h"

namespace mozilla {
namespace layers {

CompositableForwarder*
WebRenderCanvasRenderer::GetForwarder()
{
  return mManager->WrBridge();
}

void
WebRenderCanvasRenderer::Initialize(const CanvasInitializeData& aData)
{
  ShareableCanvasRenderer::Initialize(aData);
}

WebRenderCanvasRendererAsync::~WebRenderCanvasRendererAsync()
{
  Destroy();
}

void
WebRenderCanvasRendererAsync::Initialize(const CanvasInitializeData& aData)
{
  WebRenderCanvasRenderer::Initialize(aData);

  if (mPipelineId.isSome()) {
    mManager->WrBridge()->RemovePipelineIdForCompositable(mPipelineId.ref());
    mPipelineId.reset();
  }
}

bool
WebRenderCanvasRendererAsync::CreateCompositable()
{
  if (!mCanvasClient) {
    TextureFlags flags = TextureFlags::DEFAULT;
    if (mOriginPos == gl::OriginPos::BottomLeft) {
      flags |= TextureFlags::ORIGIN_BOTTOM_LEFT;
    }

    if (!mIsAlphaPremultiplied) {
      flags |= TextureFlags::NON_PREMULTIPLIED;
    }

    mCanvasClient = CanvasClient::CreateCanvasClient(GetCanvasClientType(),
                                                     GetForwarder(),
                                                     flags);
    if (!mCanvasClient) {
      return false;
    }

    mCanvasClient->Connect();
  }

  if (!mPipelineId) {
    // Alloc async image pipeline id.
    mPipelineId = Some(mManager->WrBridge()->GetCompositorBridgeChild()->GetNextPipelineId());
    mManager->WrBridge()->AddPipelineIdForCompositable(mPipelineId.ref(),
                                                       mCanvasClient->GetIPCHandle());
  }

  return true;
}

void
WebRenderCanvasRendererAsync::ClearCachedResources()
{
  if (mPipelineId.isSome()) {
    mManager->WrBridge()->RemovePipelineIdForCompositable(mPipelineId.ref());
    mPipelineId.reset();
  }
}

void
WebRenderCanvasRendererAsync::Destroy()
{
  if (mPipelineId.isSome()) {
    mManager->WrBridge()->RemovePipelineIdForCompositable(mPipelineId.ref());
    mPipelineId.reset();
  }
}

void
WebRenderCanvasRendererAsync::UpdateCompositableClientForEmptyTransaction()
{
  UpdateCompositableClient();
  if (mPipelineId.isSome()) {
    // Notify an update of async image pipeline during empty transaction.
    // During non empty transaction, WebRenderBridgeParent receives OpUpdateAsyncImagePipeline message,
    // but during empty transaction, the message is not sent to WebRenderBridgeParent.
    // Then OpUpdatedAsyncImagePipeline is used to notify the update.
    mManager->WrBridge()->AddWebRenderParentCommand(OpUpdatedAsyncImagePipeline(mPipelineId.ref()));
  }
}

} // namespace layers
} // namespace mozilla