/* -*- 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 "BasicLayersImpl.h"            // for FillRectWithMask, etc

#include "ImageContainer.h"             // for AutoLockImage, etc

#include "ImageLayers.h"                // for ImageLayer

#include "Layers.h"                     // for Layer (ptr only), etc

#include "basic/BasicImplData.h"        // for BasicImplData

#include "basic/BasicLayers.h"          // for BasicLayerManager

#include "mozilla/mozalloc.h"           // for operator new

#include "nsCOMPtr.h"                   // for already_AddRefed

#include "nsDebug.h"                    // for NS_ASSERTION

#include "nsISupportsImpl.h"            // for gfxPattern::Release, etc

#include "nsRect.h"                     // for mozilla::gfx::IntRect

#include "nsRegion.h"                   // for nsIntRegion

#include "mozilla/gfx/Point.h"          // for IntSize

using namespace mozilla::gfx;

namespace mozilla {

namespace layers {

class BasicImageLayer : public ImageLayer, public BasicImplData {

public:

  explicit BasicImageLayer(BasicLayerManager* aLayerManager) :

    ImageLayer(aLayerManager, static_cast<BasicImplData*>(this)),

    mSize(-1, -1)

  {

    MOZ_COUNT_CTOR(BasicImageLayer);

  }

protected:

  ~BasicImageLayer() override

  {

    MOZ_COUNT_DTOR(BasicImageLayer);

  }

public:

  void SetVisibleRegion(const LayerIntRegion& aRegion) override

  {

    NS_ASSERTION(BasicManager()->InConstruction(),

                 "Can only set properties in construction phase");

    ImageLayer::SetVisibleRegion(aRegion);

  }

  void Paint(DrawTarget* aDT,

             const gfx::Point& aDeviceOffset,

             Layer* aMaskLayer) override;

  already_AddRefed<SourceSurface> GetAsSourceSurface() override;

protected:

  BasicLayerManager* BasicManager()

  {

    return static_cast<BasicLayerManager*>(mManager);

  }

  gfx::IntSize mSize;

};

void

BasicImageLayer::Paint(DrawTarget* aDT,

                       const gfx::Point& aDeviceOffset,

                       Layer* aMaskLayer)

{

  if (IsHidden() || !mContainer) {

    return;

  }

  RefPtr<ImageFactory> originalIF = mContainer->GetImageFactory();

  mContainer->SetImageFactory(mManager->IsCompositingCheap() ? nullptr : BasicManager()->GetImageFactory());

  AutoLockImage autoLock(mContainer);

  Image *image = autoLock.GetImage(BasicManager()->GetCompositionTime());

  if (!image) {

    mContainer->SetImageFactory(originalIF);

    return;

  }

  RefPtr<gfx::SourceSurface> surface = image->GetAsSourceSurface();

  if (!surface || !surface->IsValid()) {

    mContainer->SetImageFactory(originalIF);

    return;

  }

  gfx::IntSize size = mSize = surface->GetSize();

  FillRectWithMask(aDT, aDeviceOffset, Rect(0, 0, size.width, size.height),

                   surface, mSamplingFilter,

                   DrawOptions(GetEffectiveOpacity(), GetEffectiveOperator(this)),

                   aMaskLayer);

  mContainer->SetImageFactory(originalIF);

}

already_AddRefed<SourceSurface>

BasicImageLayer::GetAsSourceSurface()

{

  if (!mContainer) {

    return nullptr;

  }

  AutoLockImage lockImage(mContainer);

  Image* image = lockImage.GetImage();

  if (!image) {

    return nullptr;

  }

  return image->GetAsSourceSurface();

}

already_AddRefed<ImageLayer>

BasicLayerManager::CreateImageLayer()

{

  NS_ASSERTION(InConstruction(), "Only allowed in construction phase");

  RefPtr<ImageLayer> layer = new BasicImageLayer(this);

  return layer.forget();

}

} // namespace layers

} // namespace mozilla