/* -*- 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 "CanvasLayerMLGPU.h"

#include "composite/CompositableHost.h"  // for CompositableHost

#include "gfx2DGlue.h"                  // for ToFilter

#include "gfxEnv.h"                     // for gfxEnv, etc

#include "mozilla/gfx/Matrix.h"         // for Matrix4x4

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

#include "mozilla/gfx/Rect.h"           // for Rect

#include "mozilla/layers/Compositor.h"  // for Compositor

#include "mozilla/layers/Effects.h"     // for EffectChain

#include "mozilla/layers/ImageHost.h"

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

#include "nsAString.h"

#include "mozilla/RefPtr.h"                   // for nsRefPtr

#include "MaskOperation.h"

#include "nsISupportsImpl.h"            // for MOZ_COUNT_CTOR, etc

#include "nsString.h"                   // for nsAutoCString

namespace mozilla {

namespace layers {

using namespace mozilla::gfx;

CanvasLayerMLGPU::CanvasLayerMLGPU(LayerManagerMLGPU* aManager)

  : CanvasLayer(aManager, nullptr)

  , TexturedLayerMLGPU(aManager)

{

}

CanvasLayerMLGPU::~CanvasLayerMLGPU()

{

  CleanupResources();

}

Layer*

CanvasLayerMLGPU::GetLayer()

{

  return this;

}

gfx::SamplingFilter

CanvasLayerMLGPU::GetSamplingFilter()

{

  gfx::SamplingFilter filter = mSamplingFilter;

#ifdef ANDROID

  // Bug 691354

  // Using the LINEAR filter we get unexplained artifacts.

  // Use NEAREST when no scaling is required.

  Matrix matrix;

  bool is2D = GetEffectiveTransform().Is2D(&matrix);

  if (is2D && !ThebesMatrix(matrix).HasNonTranslationOrFlip()) {

    filter = SamplingFilter::POINT;

  }

#endif

  return filter;

}

void

CanvasLayerMLGPU::PrintInfo(std::stringstream& aStream, const char* aPrefix)

{

  CanvasLayer::PrintInfo(aStream, aPrefix);

  aStream << "\n";

  if (mHost && mHost->IsAttached()) {

    nsAutoCString pfx(aPrefix);

    pfx += "  ";

    mHost->PrintInfo(aStream, pfx.get());

  }

}

void

CanvasLayerMLGPU::CleanupResources()

{

  if (mHost) {

    mHost->Detach(this);

  }

  mTexture = nullptr;

  mBigImageTexture = nullptr;

  mHost = nullptr;

}

void

CanvasLayerMLGPU::Disconnect()

{

  CleanupResources();

}

void

CanvasLayerMLGPU::ClearCachedResources()

{

  CleanupResources();

}

void

CanvasLayerMLGPU::SetRenderRegion(LayerIntRegion&& aRegion)

{

  aRegion.AndWith(LayerIntRect::FromUnknownRect(mPictureRect));

  LayerMLGPU::SetRenderRegion(std::move(aRegion));

}

} // namespace layers

} // namespace mozilla