C++ DrawTarget::CopySurface方法代碼示例

TextureClient*
CairoImage::GetTextureClient(CompositableClient *aClient)
{
  if (!aClient) {
    return nullptr;
  }

  CompositableForwarder* forwarder = aClient->GetForwarder();
  RefPtr<TextureClient> textureClient = mTextureClients.Get(forwarder->GetSerial());
  if (textureClient) {
    return textureClient;
  }

  RefPtr<SourceSurface> surface = GetAsSourceSurface();
  MOZ_ASSERT(surface);
  if (!surface) {
    return nullptr;
  }

  // gfx::BackendType::NONE means default to content backend
  textureClient = aClient->CreateTextureClientForDrawing(surface->GetFormat(),
                                                         surface->GetSize(),
                                                         gfx::BackendType::NONE,
                                                         TextureFlags::DEFAULT);
  if (!textureClient) {
    return nullptr;
  }
  MOZ_ASSERT(textureClient->CanExposeDrawTarget());
  if (!textureClient->Lock(OpenMode::OPEN_WRITE_ONLY)) {
    return nullptr;
  }

  TextureClientAutoUnlock autoUnolck(textureClient);
  {
    // We must not keep a reference to the DrawTarget after it has been unlocked.
    DrawTarget* dt = textureClient->BorrowDrawTarget();
    if (!dt) {
      return nullptr;
    }
    dt->CopySurface(surface, IntRect(IntPoint(), surface->GetSize()), IntPoint());
  }

  mTextureClients.Put(forwarder->GetSerial(), textureClient);
  return textureClient;
}

//.........這裏部分代碼省略.........
      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) {
          return false;
        }

        TextureClientAutoLock autoLock(texture, OpenMode::OPEN_WRITE_ONLY);
        if (!autoLock.Succeeded()) {
          return false;
        }

        bool status = UpdateYCbCrTextureClient(texture, *data);
        MOZ_ASSERT(status);
        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 = image->AsEGLImageImage();
          texture = EGLImageTextureData::CreateTextureClient(
            typedImage, size, GetForwarder(), mTextureFlags);
#ifdef MOZ_WIDGET_ANDROID
        } else if (image->GetFormat() == ImageFormat::SURFACE_TEXTURE) {
          SurfaceTextureImage* typedImage = image->AsSurfaceTextureImage();
          texture = AndroidSurfaceTextureData::CreateTextureClient(
            typedImage->GetSurfaceTexture(), size, typedImage->GetOriginPos(),
            GetForwarder(), mTextureFlags
          );
#endif
        } else {
          MOZ_ASSERT(false, "Bad ImageFormat.");
        }
      } else {
        RefPtr<gfx::SourceSurface> surface = image->GetAsSourceSurface();
        MOZ_ASSERT(surface);
        texture = CreateTextureClientForDrawing(surface->GetFormat(), image->GetSize(),
                                                BackendSelector::Content, 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;
    }


    CompositableForwarder::TimedTextureClient* t = textures.AppendElement();
    t->mTextureClient = texture;
    t->mTimeStamp = img.mTimeStamp;
    t->mPictureRect = image->GetPictureRect();
    t->mFrameID = img.mFrameID;
    t->mProducerID = img.mProducerID;

    Buffer* newBuf = newBuffers.AppendElement();
    newBuf->mImageSerial = image->GetSerial();
    newBuf->mTextureClient = texture;

    texture->SyncWithObject(GetForwarder()->GetSyncObject());
  }

  GetForwarder()->UseTextures(this, textures);

  for (auto& b : mBuffers) {
    RemoveTexture(b.mTextureClient);
  }
  mBuffers.SwapElements(newBuffers);

  return true;
}

/* static */ already_AddRefed<TextureClient>
ImageClient::CreateTextureClientForImage(Image* aImage, KnowsCompositor* aForwarder)
{
  RefPtr<TextureClient> texture;
  if (aImage->GetFormat() == ImageFormat::PLANAR_YCBCR) {
    PlanarYCbCrImage* ycbcr = static_cast<PlanarYCbCrImage*>(aImage);
    const PlanarYCbCrData* data = ycbcr->GetData();
    if (!data) {
      return nullptr;
    }
    texture = TextureClient::CreateForYCbCr(aForwarder,
                                            data->mYSize, data->mYStride,
                                            data->mCbCrSize, data->mCbCrStride,
                                            data->mStereoMode,
                                            data->mColorDepth,
                                            data->mYUVColorSpace,
                                            TextureFlags::DEFAULT);
    if (!texture) {
      return nullptr;
    }

    TextureClientAutoLock autoLock(texture, OpenMode::OPEN_WRITE_ONLY);
    if (!autoLock.Succeeded()) {
      return nullptr;
    }

    bool status = UpdateYCbCrTextureClient(texture, *data);
    MOZ_ASSERT(status);
    if (!status) {
      return nullptr;
    }
#ifdef MOZ_WIDGET_ANDROID
  } else if (aImage->GetFormat() == ImageFormat::SURFACE_TEXTURE) {
    gfx::IntSize size = aImage->GetSize();
    SurfaceTextureImage* typedImage = aImage->AsSurfaceTextureImage();
    texture = AndroidSurfaceTextureData::CreateTextureClient(
      typedImage->GetHandle(), size, typedImage->GetContinuous(), typedImage->GetOriginPos(),
      aForwarder->GetTextureForwarder(), TextureFlags::DEFAULT);
#endif
  } else {
    RefPtr<gfx::SourceSurface> surface = aImage->GetAsSourceSurface();
    MOZ_ASSERT(surface);
    texture = TextureClient::CreateForDrawing(aForwarder, surface->GetFormat(), aImage->GetSize(),
                                              BackendSelector::Content, TextureFlags::DEFAULT);
    if (!texture) {
      return nullptr;
    }

    MOZ_ASSERT(texture->CanExposeDrawTarget());

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

    {
      // 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 nullptr;
      }
      MOZ_ASSERT(surface.get());
      dt->CopySurface(surface, IntRect(IntPoint(), surface->GetSize()), IntPoint());
    }

    texture->Unlock();
  }
  return texture.forget();
}

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

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

  // 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;
  }

  if (mLastPaintedImageSerial == image->GetSerial()) {
    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());
      }
//.........這裏部分代碼省略.........

TextureClient*
CairoImage::GetTextureClient(CompositableClient *aClient)
{
  if (!aClient) {
    return nullptr;
  }

  CompositableForwarder* forwarder = aClient->GetForwarder();
  RefPtr<TextureClient> textureClient = mTextureClients.Get(forwarder->GetSerial());
  if (textureClient) {
    return textureClient;
  }

  RefPtr<SourceSurface> surface = GetAsSourceSurface();
  MOZ_ASSERT(surface);
  if (!surface) {
    return nullptr;
  }


// XXX windows' TextureClients do not hold ISurfaceAllocator,
// recycler does not work on windows.
#ifndef XP_WIN

// XXX only gonk ensure when TextureClient is recycled,
// TextureHost is not used by CompositableHost.
#ifdef MOZ_WIDGET_GONK
  RefPtr<TextureClientRecycleAllocator> recycler =
    aClient->GetTextureClientRecycler();
  if (recycler) {
    textureClient =
      recycler->CreateOrRecycleForDrawing(surface->GetFormat(),
                                          surface->GetSize(),
                                          gfx::BackendType::NONE,
                                          aClient->GetTextureFlags());
  }
#endif

#endif
  if (!textureClient) {
    // gfx::BackendType::NONE means default to content backend
    textureClient = aClient->CreateTextureClientForDrawing(surface->GetFormat(),
                                                           surface->GetSize(),
                                                           gfx::BackendType::NONE,
                                                           TextureFlags::DEFAULT);
  }
  if (!textureClient) {
    return nullptr;
  }
  MOZ_ASSERT(textureClient->CanExposeDrawTarget());
  if (!textureClient->Lock(OpenMode::OPEN_WRITE_ONLY)) {
    return nullptr;
  }

  TextureClientAutoUnlock autoUnolck(textureClient);
  {
    // We must not keep a reference to the DrawTarget after it has been unlocked.
    DrawTarget* dt = textureClient->BorrowDrawTarget();
    if (!dt) {
      return nullptr;
    }
    dt->CopySurface(surface, IntRect(IntPoint(), surface->GetSize()), IntPoint());
  }

  mTextureClients.Put(forwarder->GetSerial(), textureClient);
  return textureClient;
}

//.........這裏部分代碼省略.........
    }

    if (!mFrontBuffer->Lock(OpenMode::OPEN_WRITE_ONLY)) {
      mFrontBuffer = nullptr;
      return false;
    }
    bool status = mFrontBuffer->AsTextureClientYCbCr()->UpdateYCbCr(*data);
    mFrontBuffer->Unlock();

    if (bufferCreated) {
      if (!AddTextureClient(mFrontBuffer)) {
        mFrontBuffer = nullptr;
        return false;
      }
    }

    if (status) {
      GetForwarder()->UpdatedTexture(this, mFrontBuffer, nullptr);
      GetForwarder()->UseTexture(this, mFrontBuffer);
    } else {
      MOZ_ASSERT(false);
      return false;
    }

  } else if (image->GetFormat() == ImageFormat::SHARED_TEXTURE) {
    SharedTextureImage* sharedImage = static_cast<SharedTextureImage*>(image);
    const SharedTextureImage::Data *data = sharedImage->GetData();
    gfx::IntSize size = gfx::IntSize(image->GetSize().width, image->GetSize().height);

    if (mFrontBuffer) {
      autoRemoveTexture.mTexture = mFrontBuffer;
      mFrontBuffer = nullptr;
    }

    RefPtr<SharedTextureClientOGL> buffer = new SharedTextureClientOGL(mTextureFlags);
    buffer->InitWith(data->mHandle, size, data->mShareType, data->mInverted);
    mFrontBuffer = buffer;
    if (!AddTextureClient(mFrontBuffer)) {
      mFrontBuffer = nullptr;
      return false;
    }

    GetForwarder()->UseTexture(this, mFrontBuffer);
  } else {
    RefPtr<gfx::SourceSurface> surface = image->GetAsSourceSurface();
    MOZ_ASSERT(surface);

    gfx::IntSize size = image->GetSize();

    if (mFrontBuffer &&
        (mFrontBuffer->IsImmutable() || mFrontBuffer->GetSize() != size)) {
      autoRemoveTexture.mTexture = mFrontBuffer;
      mFrontBuffer = nullptr;
    }

    bool bufferCreated = false;
    if (!mFrontBuffer) {
      gfxImageFormat format
        = gfxPlatform::GetPlatform()->OptimalFormatForContent(gfx::ContentForFormat(surface->GetFormat()));
      mFrontBuffer = CreateTextureClientForDrawing(gfx::ImageFormatToSurfaceFormat(format), size,
                                                   gfx::BackendType::NONE, mTextureFlags);
      if (!mFrontBuffer) {
        return false;
      }
      MOZ_ASSERT(mFrontBuffer->CanExposeDrawTarget());
      bufferCreated = true;
    }

    if (!mFrontBuffer->Lock(OpenMode::OPEN_WRITE_ONLY)) {
      mFrontBuffer = nullptr;
      return false;
    }

    {
      // We must not keep a reference to the DrawTarget after it has been unlocked.
      DrawTarget* dt = mFrontBuffer->BorrowDrawTarget();
      MOZ_ASSERT(surface.get());
      dt->CopySurface(surface, IntRect(IntPoint(), surface->GetSize()), IntPoint());
    }

    mFrontBuffer->Unlock();

    if (bufferCreated) {
      if (!AddTextureClient(mFrontBuffer)) {
        mFrontBuffer = nullptr;
        return false;
      }
    }

    GetForwarder()->UpdatedTexture(this, mFrontBuffer, nullptr);
    GetForwarder()->UseTexture(this, mFrontBuffer);
  }

  UpdatePictureRect(image->GetPictureRect());

  mLastPaintedImageSerial = image->GetSerial();
  aContainer->NotifyPaintedImage(image);
  *aIsSwapped = true;
  return true;
}