/* -*- 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 "ImageClient.h"
#include <stdint.h>                     // for uint32_t
#include "ImageContainer.h"             // for Image, PlanarYCbCrImage, etc
#include "ImageTypes.h"                 // for ImageFormat::PLANAR_YCBCR, etc
#include "GLImages.h"                   // for SurfaceTextureImage::Data, etc
#include "gfx2DGlue.h"                  // for ImageFormatToSurfaceFormat
#include "gfxPlatform.h"                // for gfxPlatform
#include "mozilla/Assertions.h"         // for MOZ_ASSERT, etc
#include "mozilla/RefPtr.h"             // for RefPtr, already_AddRefed
#include "mozilla/gfx/BaseSize.h"       // for BaseSize
#include "mozilla/gfx/Point.h"          // for IntSize
#include "mozilla/gfx/Types.h"          // for SurfaceFormat, etc
#include "mozilla/layers/CompositableClient.h"  // for CompositableClient
#include "mozilla/layers/CompositableForwarder.h"
#include "mozilla/layers/CompositorTypes.h"  // for CompositableType, etc
#include "mozilla/layers/ISurfaceAllocator.h"
#include "mozilla/layers/LayersSurfaces.h"  // for SurfaceDescriptor, etc
#include "mozilla/layers/ShadowLayers.h"  // for ShadowLayerForwarder
#include "mozilla/layers/SharedPlanarYCbCrImage.h"
#include "mozilla/layers/SharedRGBImage.h"
#include "mozilla/layers/TextureClient.h"  // for TextureClient, etc
#include "mozilla/layers/TextureClientOGL.h"  // for SurfaceTextureClient
#include "mozilla/mozalloc.h"           // for operator delete, etc
#include "nsAutoPtr.h"                  // for nsRefPtr
#include "nsCOMPtr.h"                   // for already_AddRefed
#include "nsDebug.h"                    // for NS_WARNING, NS_ASSERTION
#include "nsISupportsImpl.h"            // for Image::Release, etc
#include "nsRect.h"                     // for mozilla::gfx::IntRect
#include "mozilla/gfx/2D.h"
#ifdef MOZ_WIDGET_GONK
#include "GrallocImages.h"
#endif

namespace mozilla {
namespace layers {

using namespace mozilla::gfx;

/* static */ already_AddRefed<ImageClient>
ImageClient::CreateImageClient(CompositableType aCompositableHostType,
                               CompositableForwarder* aForwarder,
                               TextureFlags aFlags)
{
  RefPtr<ImageClient> result = nullptr;
  switch (aCompositableHostType) {
  case CompositableType::IMAGE:
    result = new ImageClientSingle(aForwarder, aFlags, CompositableType::IMAGE);
    break;
  case CompositableType::IMAGE_BRIDGE:
    result = new ImageClientBridge(aForwarder, aFlags);
    break;
  case CompositableType::UNKNOWN:
    result = nullptr;
    break;
#ifdef MOZ_WIDGET_GONK
  case CompositableType::IMAGE_OVERLAY:
    result = new ImageClientOverlay(aForwarder, aFlags);
    break;
#endif
  default:
    MOZ_CRASH("unhandled program type");
  }

  NS_ASSERTION(result, "Failed to create ImageClient");

  return result.forget();
}

void
ImageClient::RemoveTexture(TextureClient* aTexture)
{
  RemoveTextureWithWaiter(aTexture);
}

void
ImageClient::RemoveTextureWithWaiter(TextureClient* aTexture,
                                     AsyncTransactionWaiter* aAsyncTransactionWaiter)
{
#ifdef MOZ_WIDGET_GONK
  if (aAsyncTransactionWaiter ||
      GetForwarder()->IsImageBridgeChild()) {
    RefPtr<AsyncTransactionTracker> request =
      new RemoveTextureFromCompositableTracker(aAsyncTransactionWaiter);
    // Hold TextureClient until the transaction complete to postpone
    // the TextureClient recycle/delete.
    request->SetTextureClient(aTexture);
    GetForwarder()->RemoveTextureFromCompositableAsync(request, this, aTexture);
    return;
  }
#endif

  GetForwarder()->RemoveTextureFromCompositable(this, aTexture);
}

ImageClientSingle::ImageClientSingle(CompositableForwarder* aFwd,
                                     TextureFlags aFlags,
                                     CompositableType aType)
  : ImageClient(aFwd, aFlags, aType)
{
}

TextureInfo ImageClientSingle::GetTextureInfo() const
{
  return TextureInfo(CompositableType::IMAGE);
}

void
ImageClientSingle::FlushAllImages(bool aExceptFront,
                                  AsyncTransactionWaiter* aAsyncTransactionWaiter)
{
  if (!aExceptFront && mFrontBuffer) {
    RemoveTextureWithWaiter(mFrontBuffer, aAsyncTransactionWaiter);
    mFrontBuffer = nullptr;
  }
}

bool
ImageClientSingle::UpdateImage(ImageContainer* aContainer, uint32_t aContentFlags)
{
  nsAutoTArray<ImageContainer::OwningImage,4> images;
  uint32_t generationCounter;
  aContainer->GetCurrentImages(&images, &generationCounter);

  if (mLastUpdateGenerationCounter == generationCounter) {
    return true;
  }
  mLastUpdateGenerationCounter = generationCounter;

  Image* image = images[0].mImage;
  // Don't try to update to an invalid image. We return true because the caller
  // would attempt to recreate the ImageClient otherwise, and that isn't going
  // to help.
  if (!image->IsValid()) {
    return true;
  }

  RefPtr<TextureClient> texture = image->GetTextureClient(this);

  AutoRemoveTexture autoRemoveTexture(this);
  if (texture != mFrontBuffer) {
    autoRemoveTexture.mTexture = mFrontBuffer;
    mFrontBuffer = nullptr;
  }

  if (!texture) {
    // Slow path, we should not be hitting it very often and if we do it means
    // we are using an Image class that is not backed by textureClient and we
    // should fix it.
    if (image->GetFormat() == ImageFormat::PLANAR_YCBCR) {
      PlanarYCbCrImage* ycbcr = static_cast<PlanarYCbCrImage*>(image);
      const PlanarYCbCrData* data = ycbcr->GetData();
      if (!data) {
        return false;
      }
      texture = TextureClient::CreateForYCbCr(GetForwarder(),
        data->mYSize, data->mCbCrSize, data->mStereoMode,
        TextureFlags::DEFAULT | mTextureFlags
      );
      if (!texture || !texture->Lock(OpenMode::OPEN_WRITE_ONLY)) {
        return false;
      }
      bool status = texture->AsTextureClientYCbCr()->UpdateYCbCr(*data);
      MOZ_ASSERT(status);

      texture->Unlock();
      if (!status) {
        return false;
      }

    } else if (image->GetFormat() == ImageFormat::SURFACE_TEXTURE ||
               image->GetFormat() == ImageFormat::EGLIMAGE) {
      gfx::IntSize size = image->GetSize();

      if (image->GetFormat() == ImageFormat::EGLIMAGE) {
        EGLImageImage* typedImage = static_cast<EGLImageImage*>(image);
        texture = new EGLImageTextureClient(GetForwarder(),
                                            mTextureFlags,
                                            typedImage,
                                            size);
#ifdef MOZ_WIDGET_ANDROID
      } else if (image->GetFormat() == ImageFormat::SURFACE_TEXTURE) {
        SurfaceTextureImage* typedImage = static_cast<SurfaceTextureImage*>(image);
        const SurfaceTextureImage::Data* data = typedImage->GetData();
        texture = new SurfaceTextureClient(GetForwarder(), mTextureFlags,
                                           data->mSurfTex, size,
                                           data->mOriginPos);
#endif
      } else {
        MOZ_ASSERT(false, "Bad ImageFormat.");
      }
    } else {
      RefPtr<gfx::SourceSurface> surface = image->GetAsSourceSurface();
      MOZ_ASSERT(surface);
      texture = CreateTextureClientForDrawing(surface->GetFormat(), image->GetSize(),
                                              gfx::BackendType::NONE, mTextureFlags);
      if (!texture) {
        return false;
      }

      MOZ_ASSERT(texture->CanExposeDrawTarget());

      if (!texture->Lock(OpenMode::OPEN_WRITE_ONLY)) {
        return false;
      }

      {
        // We must not keep a reference to the DrawTarget after it has been unlocked.
        DrawTarget* dt = texture->BorrowDrawTarget();
        if (!dt) {
          gfxWarning() << "ImageClientSingle::UpdateImage failed in BorrowDrawTarget";
          return false;
        }
        MOZ_ASSERT(surface.get());
        dt->CopySurface(surface, IntRect(IntPoint(), surface->GetSize()), IntPoint());
      }

      texture->Unlock();
    }
  }
  if (!texture || !AddTextureClient(texture)) {
    return false;
  }

  mFrontBuffer = texture;
  IntRect pictureRect = image->GetPictureRect();
  GetForwarder()->UseTexture(this, texture, &pictureRect);

  aContainer->NotifyPaintedImage(image);
  texture->SyncWithObject(GetForwarder()->GetSyncObject());

  return true;
}

bool
ImageClientSingle::AddTextureClient(TextureClient* aTexture)
{
  MOZ_ASSERT((mTextureFlags & aTexture->GetFlags()) == mTextureFlags);
  return CompositableClient::AddTextureClient(aTexture);
}

void
ImageClientSingle::OnDetach()
{
  mFrontBuffer = nullptr;
}

ImageClient::ImageClient(CompositableForwarder* aFwd, TextureFlags aFlags,
                         CompositableType aType)
: CompositableClient(aFwd, aFlags)
, mLayer(nullptr)
, mType(aType)
, mLastUpdateGenerationCounter(0)
{}

ImageClientBridge::ImageClientBridge(CompositableForwarder* aFwd,
                                     TextureFlags aFlags)
: ImageClient(aFwd, aFlags, CompositableType::IMAGE_BRIDGE)
, mAsyncContainerID(0)
{
}

bool
ImageClientBridge::UpdateImage(ImageContainer* aContainer, uint32_t aContentFlags)
{
  if (!GetForwarder() || !mLayer) {
    return false;
  }
  if (mAsyncContainerID == aContainer->GetAsyncContainerID()) {
    return true;
  }
  mAsyncContainerID = aContainer->GetAsyncContainerID();
  static_cast<ShadowLayerForwarder*>(GetForwarder())->AttachAsyncCompositable(mAsyncContainerID, mLayer);
  AutoLockImage autoLock(aContainer);
  aContainer->NotifyPaintedImage(autoLock.GetImage());
  return true;
}

already_AddRefed<Image>
ImageClientSingle::CreateImage(ImageFormat aFormat)
{
  nsRefPtr<Image> img;
  switch (aFormat) {
    case ImageFormat::PLANAR_YCBCR:
      img = new SharedPlanarYCbCrImage(this);
      return img.forget();
    case ImageFormat::SHARED_RGB:
      img = new SharedRGBImage(this);
      return img.forget();
#ifdef MOZ_WIDGET_GONK
    case ImageFormat::GRALLOC_PLANAR_YCBCR:
      img = new GrallocImage();
      return img.forget();
#endif
    default:
      return nullptr;
  }
}

#ifdef MOZ_WIDGET_GONK
ImageClientOverlay::ImageClientOverlay(CompositableForwarder* aFwd,
                                       TextureFlags aFlags)
  : ImageClient(aFwd, aFlags, CompositableType::IMAGE_OVERLAY)
{
}

bool
ImageClientOverlay::UpdateImage(ImageContainer* aContainer, uint32_t aContentFlags)
{
  AutoLockImage autoLock(aContainer);

  Image *image = autoLock.GetImage();
  if (!image) {
    return false;
  }

  if (mLastUpdateGenerationCounter == (uint32_t)image->GetSerial()) {
    return true;
  }
  mLastUpdateGenerationCounter = (uint32_t)image->GetSerial();

  AutoRemoveTexture autoRemoveTexture(this);
  if (image->GetFormat() == ImageFormat::OVERLAY_IMAGE) {
    OverlayImage* overlayImage = static_cast<OverlayImage*>(image);
    uint32_t overlayId = overlayImage->GetOverlayId();
    gfx::IntSize size = overlayImage->GetSize();

    OverlaySource source;
    source.handle() = OverlayHandle(overlayId);
    source.size() = size;
    GetForwarder()->UseOverlaySource(this, source, image->GetPictureRect());
  }
  return true;
}

already_AddRefed<Image>
ImageClientOverlay::CreateImage(ImageFormat aFormat)
{
  nsRefPtr<Image> img;
  switch (aFormat) {
    case ImageFormat::OVERLAY_IMAGE:
      img = new OverlayImage();
      return img.forget();
    default:
      return nullptr;
  }
}

#endif
} // namespace layers
} // namespace mozilla