Ejemplo n.º 1
0
bool
DeprecatedContentHostSingleBuffered::UpdateThebes(const ThebesBufferData& aData,
                                        const nsIntRegion& aUpdated,
                                        const nsIntRegion& aOldValidRegionBack,
                                        nsIntRegion* aUpdatedRegionBack)
{
  aUpdatedRegionBack->SetEmpty();

  if (!mDeprecatedTextureHost && !mNewFrontHost) {
    mInitialised = false;
    return true;
  }

  if (mNewFrontHost) {
    DestroyFrontHost();
    mDeprecatedTextureHost = mNewFrontHost;
    mNewFrontHost = nullptr;
    if (mNewFrontHostOnWhite) {
      mDeprecatedTextureHostOnWhite = mNewFrontHostOnWhite;
      mNewFrontHostOnWhite = nullptr;
    }
  }

  MOZ_ASSERT(mDeprecatedTextureHost);
  MOZ_ASSERT(!mNewFrontHostOnWhite, "New white host without a new black?");

  // updated is in screen coordinates. Convert it to buffer coordinates.
  nsIntRegion destRegion(aUpdated);
  destRegion.MoveBy(-aData.rect().TopLeft());

  // Correct for rotation
  destRegion.MoveBy(aData.rotation());

  IntSize size = aData.rect().Size().ToIntSize();
  nsIntRect destBounds = destRegion.GetBounds();
  destRegion.MoveBy((destBounds.x >= size.width) ? -size.width : 0,
                    (destBounds.y >= size.height) ? -size.height : 0);

  // We can get arbitrary bad regions from an untrusted client,
  // which we need to be resilient to. See bug 967330.
  if((destBounds.x % size.width) + destBounds.width > size.width ||
     (destBounds.y % size.height) + destBounds.height > size.height)
  {
    NS_ERROR("updated region lies across rotation boundaries!");
    return false;
  }

  mDeprecatedTextureHost->Update(*mDeprecatedTextureHost->LockSurfaceDescriptor(), &destRegion);
  if (mDeprecatedTextureHostOnWhite) {
    mDeprecatedTextureHostOnWhite->Update(*mDeprecatedTextureHostOnWhite->LockSurfaceDescriptor(), &destRegion);
  }
  mInitialised = true;

  mBufferRect = aData.rect();
  mBufferRotation = aData.rotation();

  return true;
}
Ejemplo n.º 2
0
bool
DeprecatedContentHostDoubleBuffered::UpdateThebes(const ThebesBufferData& aData,
                                        const nsIntRegion& aUpdated,
                                        const nsIntRegion& aOldValidRegionBack,
                                        nsIntRegion* aUpdatedRegionBack)
{
  if (!mDeprecatedTextureHost && !mNewFrontHost) {
    mInitialised = false;

    *aUpdatedRegionBack = aUpdated;
    return true;
  }

  if (mNewFrontHost) {
    DestroyFrontHost();
    mDeprecatedTextureHost = mNewFrontHost;
    mNewFrontHost = nullptr;
    if (mNewFrontHostOnWhite) {
      mDeprecatedTextureHostOnWhite = mNewFrontHostOnWhite;
      mNewFrontHostOnWhite = nullptr;
    }
  }

  MOZ_ASSERT(mDeprecatedTextureHost);
  MOZ_ASSERT(!mNewFrontHostOnWhite, "New white host without a new black?");
  MOZ_ASSERT(mBackHost);

  RefPtr<DeprecatedTextureHost> oldFront = mDeprecatedTextureHost;
  mDeprecatedTextureHost = mBackHost;
  mBackHost = oldFront;

  oldFront = mDeprecatedTextureHostOnWhite;
  mDeprecatedTextureHostOnWhite = mBackHostOnWhite;
  mBackHostOnWhite = oldFront;

  mDeprecatedTextureHost->Update(*mDeprecatedTextureHost->LockSurfaceDescriptor());
  if (mDeprecatedTextureHostOnWhite) {
    mDeprecatedTextureHostOnWhite->Update(*mDeprecatedTextureHostOnWhite->LockSurfaceDescriptor());
  }
  mInitialised = true;

  mBufferRect = aData.rect();
  mBufferRotation = aData.rotation();

  *aUpdatedRegionBack = aUpdated;

  // Save the current valid region of our front buffer, because if
  // we're double buffering, it's going to be the valid region for the
  // next back buffer sent back to the renderer.
  //
  // NB: we rely here on the fact that mValidRegion is initialized to
  // empty, and that the first time Swap() is called we don't have a
  // valid front buffer that we're going to return to content.
  mValidRegionForNextBackBuffer = aOldValidRegionBack;

  return true;
}
Ejemplo n.º 3
0
void
DeprecatedContentHostSingleBuffered::UpdateThebes(const ThebesBufferData& aData,
                                        const nsIntRegion& aUpdated,
                                        const nsIntRegion& aOldValidRegionBack,
                                        nsIntRegion* aUpdatedRegionBack)
{
  aUpdatedRegionBack->SetEmpty();

  if (!mDeprecatedTextureHost && !mNewFrontHost) {
    mInitialised = false;
    return;
  }

  if (mNewFrontHost) {
    DestroyFrontHost();
    mDeprecatedTextureHost = mNewFrontHost;
    mNewFrontHost = nullptr;
    if (mNewFrontHostOnWhite) {
      mDeprecatedTextureHostOnWhite = mNewFrontHostOnWhite;
      mNewFrontHostOnWhite = nullptr;
    }
  }

  MOZ_ASSERT(mDeprecatedTextureHost);
  MOZ_ASSERT(!mNewFrontHostOnWhite, "New white host without a new black?");

  // updated is in screen coordinates. Convert it to buffer coordinates.
  nsIntRegion destRegion(aUpdated);
  destRegion.MoveBy(-aData.rect().TopLeft());

  // Correct for rotation
  destRegion.MoveBy(aData.rotation());

  gfxIntSize size = aData.rect().Size();
  nsIntRect destBounds = destRegion.GetBounds();
  destRegion.MoveBy((destBounds.x >= size.width) ? -size.width : 0,
                    (destBounds.y >= size.height) ? -size.height : 0);

  // There's code to make sure that updated regions don't cross rotation
  // boundaries, so assert here that this is the case
  MOZ_ASSERT((destBounds.x % size.width) + destBounds.width <= size.width,
               "updated region lies across rotation boundaries!");
  MOZ_ASSERT((destBounds.y % size.height) + destBounds.height <= size.height,
               "updated region lies across rotation boundaries!");

  mDeprecatedTextureHost->Update(*mDeprecatedTextureHost->LockSurfaceDescriptor(), &destRegion);
  if (mDeprecatedTextureHostOnWhite) {
    mDeprecatedTextureHostOnWhite->Update(*mDeprecatedTextureHostOnWhite->LockSurfaceDescriptor(), &destRegion);
  }
  mInitialised = true;

  mBufferRect = aData.rect();
  mBufferRotation = aData.rotation();
}
Ejemplo n.º 4
0
bool
ContentHostSingleBuffered::UpdateThebes(const ThebesBufferData& aData,
                                        const nsIntRegion& aUpdated,
                                        const nsIntRegion& aOldValidRegionBack,
                                        nsIntRegion* aUpdatedRegionBack)
{
  aUpdatedRegionBack->SetEmpty();

  if (!mTextureHost) {
    mInitialised = false;
    return true; // FIXME should we return false? Returning true for now
  }              // to preserve existing behavior of NOT causing IPC errors.

  // updated is in screen coordinates. Convert it to buffer coordinates.
  nsIntRegion destRegion(aUpdated);
  destRegion.MoveBy(-aData.rect().TopLeft());

  // Correct for rotation
  destRegion.MoveBy(aData.rotation());

  IntSize size = aData.rect().Size().ToIntSize();
  nsIntRect destBounds = destRegion.GetBounds();
  destRegion.MoveBy((destBounds.x >= size.width) ? -size.width : 0,
                    (destBounds.y >= size.height) ? -size.height : 0);

  // We can get arbitrary bad regions from an untrusted client,
  // which we need to be resilient to. See bug 967330.
  if((destBounds.x % size.width) + destBounds.width > size.width ||
     (destBounds.y % size.height) + destBounds.height > size.height)
  {
    NS_ERROR("updated region lies across rotation boundaries!");
    return false;
  }

  mTextureHost->Updated(&destRegion);
  if (mTextureHostOnWhite) {
    mTextureHostOnWhite->Updated(&destRegion);
  }
  mInitialised = true;

  mBufferRect = aData.rect();
  mBufferRotation = aData.rotation();

  return true;
}
Ejemplo n.º 5
0
void
ContentHostSingleBuffered::UpdateThebes(const ThebesBufferData& aData,
                                        const nsIntRegion& aUpdated,
                                        const nsIntRegion& aOldValidRegionBack,
                                        nsIntRegion* aUpdatedRegionBack)
{
  aUpdatedRegionBack->SetEmpty();

  if (!mTextureHost) {
    mInitialised = false;
    return;
  }

  // updated is in screen coordinates. Convert it to buffer coordinates.
  nsIntRegion destRegion(aUpdated);
  destRegion.MoveBy(-aData.rect().TopLeft());

  // Correct for rotation
  destRegion.MoveBy(aData.rotation());

  gfxIntSize size = aData.rect().Size();
  nsIntRect destBounds = destRegion.GetBounds();
  destRegion.MoveBy((destBounds.x >= size.width) ? -size.width : 0,
                    (destBounds.y >= size.height) ? -size.height : 0);

  // There's code to make sure that updated regions don't cross rotation
  // boundaries, so assert here that this is the case
  MOZ_ASSERT((destBounds.x % size.width) + destBounds.width <= size.width,
               "updated region lies across rotation boundaries!");
  MOZ_ASSERT((destBounds.y % size.height) + destBounds.height <= size.height,
               "updated region lies across rotation boundaries!");

  mTextureHost->Updated(&destRegion);
  if (mTextureHostOnWhite) {
    mTextureHostOnWhite->Updated(&destRegion);
  }
  mInitialised = true;

  mBufferRect = aData.rect();
  mBufferRotation = aData.rotation();
}
Ejemplo n.º 6
0
bool
ContentHostDoubleBuffered::UpdateThebes(const ThebesBufferData& aData,
                                        const nsIntRegion& aUpdated,
                                        const nsIntRegion& aOldValidRegionBack,
                                        nsIntRegion* aUpdatedRegionBack)
{
  if (!mTextureHost) {
    mInitialised = false;

    *aUpdatedRegionBack = aUpdated;
    return true;
  }

  // We don't need to calculate an update region because we assume that if we
  // are using double buffering then we have render-to-texture and thus no
  // upload to do.
  mTextureHost->Updated();
  if (mTextureHostOnWhite) {
    mTextureHostOnWhite->Updated();
  }
  mInitialised = true;

  mBufferRect = aData.rect();
  mBufferRotation = aData.rotation();

  *aUpdatedRegionBack = aUpdated;

  // Save the current valid region of our front buffer, because if
  // we're double buffering, it's going to be the valid region for the
  // next back buffer sent back to the renderer.
  //
  // NB: we rely here on the fact that mValidRegion is initialized to
  // empty, and that the first time Swap() is called we don't have a
  // valid front buffer that we're going to return to content.
  mValidRegionForNextBackBuffer = aOldValidRegionBack;

  return true;
}
Ejemplo n.º 7
0
bool
ContentHostSingleBuffered::UpdateThebes(const ThebesBufferData& aData,
                                        const nsIntRegion& aUpdated,
                                        const nsIntRegion& aOldValidRegionBack,
                                        nsIntRegion* aUpdatedRegionBack)
{
  aUpdatedRegionBack->SetEmpty();

  if (!mTextureHost) {
    mInitialised = false;
    return true; // FIXME should we return false? Returning true for now
  }              // to preserve existing behavior of NOT causing IPC errors.

  // updated is in screen coordinates. Convert it to buffer coordinates.
  nsIntRegion destRegion(aUpdated);
  destRegion.MoveBy(-aData.rect().TopLeft());

  if (!aData.rect().Contains(aUpdated.GetBounds()) ||
      aData.rotation().x > aData.rect().width ||
      aData.rotation().y > aData.rect().height) {
    NS_ERROR("Invalid update data");
    return false;
  }

  // destRegion is now in logical coordinates relative to the buffer, but we
  // need to account for rotation. We do that by moving the region to the
  // rotation offset and then wrapping any pixels that extend off the
  // bottom/right edges.

  // Shift to the rotation point
  destRegion.MoveBy(aData.rotation());

  nsIntSize bufferSize = aData.rect().Size();

  // Select only the pixels that are still within the buffer.
  nsIntRegion finalRegion;
  finalRegion.And(nsIntRect(nsIntPoint(), bufferSize), destRegion);

  // For each of the overlap areas (right, bottom-right, bottom), select those
  // pixels and wrap them around to the opposite edge of the buffer rect.
  AddWrappedRegion(destRegion, finalRegion, bufferSize, nsIntPoint(aData.rect().width, 0));
  AddWrappedRegion(destRegion, finalRegion, bufferSize, nsIntPoint(aData.rect().width, aData.rect().height));
  AddWrappedRegion(destRegion, finalRegion, bufferSize, nsIntPoint(0, aData.rect().height));

  MOZ_ASSERT(nsIntRect(0, 0, aData.rect().width, aData.rect().height).Contains(finalRegion.GetBounds()));

  mTextureHost->Updated(&finalRegion);
  if (mTextureHostOnWhite) {
    mTextureHostOnWhite->Updated(&finalRegion);
  }
  mInitialised = true;

  mBufferRect = aData.rect();
  mBufferRotation = aData.rotation();

  return true;
}