C++ nsIntRegion::Or方法代码示例

void
LayerManagerComposite::InvalidateDebugOverlay(nsIntRegion& aInvalidRegion, const IntRect& aBounds)
{
  bool drawFps = gfxPrefs::LayersDrawFPS();
  bool drawFrameCounter = gfxPrefs::DrawFrameCounter();
  bool drawFrameColorBars = gfxPrefs::CompositorDrawColorBars();
  bool drawPaintTimes = gfxPrefs::AlwaysPaint();

  if (drawFps || drawFrameCounter) {
    aInvalidRegion.Or(aInvalidRegion, nsIntRect(0, 0, 256, 256));
  }
  if (drawFrameColorBars) {
    aInvalidRegion.Or(aInvalidRegion, nsIntRect(0, 0, 10, aBounds.height));
  }
  if (drawPaintTimes) {
    aInvalidRegion.Or(aInvalidRegion, nsIntRect(PaintCounter::GetPaintRect()));
  }
}

static inline void
AddWrappedRegion(const nsIntRegion& aInput, nsIntRegion& aOutput,
                 const nsIntSize& aSize, const nsIntPoint& aShift)
{
  nsIntRegion tempRegion;
  tempRegion.And(nsIntRect(aShift, aSize), aInput);
  tempRegion.MoveBy(-aShift);
  aOutput.Or(aOutput, tempRegion);
}

static void
AddTransformedRegion(nsIntRegion& aDest, const nsIntRegion& aSource, const Matrix4x4& aTransform)
{
  nsIntRegionRectIterator iter(aSource);
  const IntRect *r;
  while ((r = iter.Next())) {
    aDest.Or(aDest, TransformRect(*r, aTransform));
  }
  aDest.SimplifyOutward(20);
}

void
LayerManagerComposite::ApplyOcclusionCulling(Layer* aLayer, nsIntRegion& aOpaqueRegion)
{
  nsIntRegion localOpaque;
  Matrix transform2d;
  bool isTranslation = false;
  // If aLayer has a simple transform (only an integer translation) then we
  // can easily convert aOpaqueRegion into pre-transform coordinates and include
  // that region.
  if (aLayer->GetLocalTransform().Is2D(&transform2d)) {
    if (transform2d.IsIntegerTranslation()) {
      isTranslation = true;
      localOpaque = aOpaqueRegion;
      localOpaque.MoveBy(-transform2d._31, -transform2d._32);
    }
  }

  // Subtract any areas that we know to be opaque from our
  // visible region.
  LayerComposite *composite = aLayer->AsLayerComposite();
  if (!localOpaque.IsEmpty()) {
    nsIntRegion visible = composite->GetShadowVisibleRegion();
    visible.Sub(visible, localOpaque);
    composite->SetShadowVisibleRegion(visible);
  }

  // Compute occlusions for our descendants (in front-to-back order) and allow them to
  // contribute to localOpaque.
  for (Layer* child = aLayer->GetLastChild(); child; child = child->GetPrevSibling()) {
    ApplyOcclusionCulling(child, localOpaque);
  }

  // If we have a simple transform, then we can add our opaque area into
  // aOpaqueRegion.
  if (isTranslation &&
      !aLayer->HasMaskLayers() &&
      aLayer->GetLocalOpacity() == 1.0f) {
    if (aLayer->GetContentFlags() & Layer::CONTENT_OPAQUE) {
      localOpaque.Or(localOpaque, composite->GetFullyRenderedRegion());
    }
    localOpaque.MoveBy(transform2d._31, transform2d._32);
    const Maybe<ParentLayerIntRect>& clip = aLayer->GetEffectiveClipRect();
    if (clip) {
      localOpaque.And(localOpaque, ParentLayerIntRect::ToUntyped(*clip));
    }
    aOpaqueRegion.Or(aOpaqueRegion, localOpaque);
  }
}

bool
ClientTiledLayerBuffer::ProgressiveUpdate(nsIntRegion& aValidRegion,
                                         nsIntRegion& aInvalidRegion,
                                         const nsIntRegion& aOldValidRegion,
                                         BasicTiledLayerPaintData* aPaintData,
                                         LayerManager::DrawThebesLayerCallback aCallback,
                                         void* aCallbackData)
{
  bool repeat = false;
  bool isBufferChanged = false;
  do {
    // Compute the region that should be updated. Repeat as many times as
    // is required.
    nsIntRegion regionToPaint;
    repeat = ComputeProgressiveUpdateRegion(aInvalidRegion,
                                            aOldValidRegion,
                                            regionToPaint,
                                            aPaintData,
                                            repeat);

    // There's no further work to be done.
    if (regionToPaint.IsEmpty()) {
      break;
    }

    isBufferChanged = true;

    // Keep track of what we're about to refresh.
    aValidRegion.Or(aValidRegion, regionToPaint);

    // aValidRegion may have been altered by InvalidateRegion, but we still
    // want to display stale content until it gets progressively updated.
    // Create a region that includes stale content.
    nsIntRegion validOrStale;
    validOrStale.Or(aValidRegion, aOldValidRegion);

    // Paint the computed region and subtract it from the invalid region.
    PaintThebes(validOrStale, regionToPaint, aCallback, aCallbackData);
    aInvalidRegion.Sub(aInvalidRegion, regionToPaint);
  } while (repeat);

  // Return false if nothing has been drawn, or give what has been drawn
  // to the shadow layer to upload.
  return isBufferChanged;
}

static void
AddRegion(nsIntRegion& aDest, const nsIntRegion& aSource)
{
  aDest.Or(aDest, aSource);
  aDest.SimplifyOutward(20);
}

bool
ClientTiledLayerBuffer::ComputeProgressiveUpdateRegion(const nsIntRegion& aInvalidRegion,
                                                      const nsIntRegion& aOldValidRegion,
                                                      nsIntRegion& aRegionToPaint,
                                                      BasicTiledLayerPaintData* aPaintData,
                                                      bool aIsRepeated)
{
  aRegionToPaint = aInvalidRegion;

  // If the composition bounds rect is empty, we can't make any sensible
  // decision about how to update coherently. In this case, just update
  // everything in one transaction.
  if (aPaintData->mCompositionBounds.IsEmpty()) {
    aPaintData->mPaintFinished = true;
    return false;
  }

  // If this is a low precision buffer, we force progressive updates. The
  // assumption is that the contents is less important, so visual coherency
  // is lower priority than speed.
  bool drawingLowPrecision = IsLowPrecision();

  // Find out if we have any non-stale content to update.
  nsIntRegion staleRegion;
  staleRegion.And(aInvalidRegion, aOldValidRegion);

  // Find out the current view transform to determine which tiles to draw
  // first, and see if we should just abort this paint. Aborting is usually
  // caused by there being an incoming, more relevant paint.
  ParentLayerRect compositionBounds;
  CSSToParentLayerScale zoom;
#if defined(MOZ_WIDGET_ANDROID)
  bool abortPaint = mManager->ProgressiveUpdateCallback(!staleRegion.Contains(aInvalidRegion),
                                                        compositionBounds, zoom,
                                                        !drawingLowPrecision);
#else
  MOZ_ASSERT(mSharedFrameMetricsHelper);

  ContainerLayer* parent = mThebesLayer->AsLayer()->GetParent();

  bool abortPaint =
    mSharedFrameMetricsHelper->UpdateFromCompositorFrameMetrics(
      parent,
      !staleRegion.Contains(aInvalidRegion),
      drawingLowPrecision,
      compositionBounds,
      zoom);
#endif

  if (abortPaint) {
    // We ignore if front-end wants to abort if this is the first,
    // non-low-precision paint, as in that situation, we're about to override
    // front-end's page/viewport metrics.
    if (!aPaintData->mFirstPaint || drawingLowPrecision) {
      PROFILER_LABEL("ContentClient", "Abort painting");
      aRegionToPaint.SetEmpty();
      return aIsRepeated;
    }
  }

  // Transform the screen coordinates into transformed layout device coordinates.
  LayoutDeviceRect transformedCompositionBounds =
    TransformCompositionBounds(compositionBounds, zoom, aPaintData->mScrollOffset,
                               aPaintData->mResolution, aPaintData->mTransformParentLayerToLayout);

  // Paint tiles that have stale content or that intersected with the screen
  // at the time of issuing the draw command in a single transaction first.
  // This is to avoid rendering glitches on animated page content, and when
  // layers change size/shape.
  LayoutDeviceRect coherentUpdateRect =
    transformedCompositionBounds.Intersect(aPaintData->mCompositionBounds);

  nsIntRect roundedCoherentUpdateRect =
    LayoutDeviceIntRect::ToUntyped(RoundedOut(coherentUpdateRect));

  aRegionToPaint.And(aInvalidRegion, roundedCoherentUpdateRect);
  aRegionToPaint.Or(aRegionToPaint, staleRegion);
  bool drawingStale = !aRegionToPaint.IsEmpty();
  if (!drawingStale) {
    aRegionToPaint = aInvalidRegion;
  }

  // Prioritise tiles that are currently visible on the screen.
  bool paintVisible = false;
  if (aRegionToPaint.Intersects(roundedCoherentUpdateRect)) {
    aRegionToPaint.And(aRegionToPaint, roundedCoherentUpdateRect);
    paintVisible = true;
  }

  // Paint area that's visible and overlaps previously valid content to avoid
  // visible glitches in animated elements, such as gifs.
  bool paintInSingleTransaction = paintVisible && (drawingStale || aPaintData->mFirstPaint);

  // The following code decides what order to draw tiles in, based on the
  // current scroll direction of the primary scrollable layer.
  NS_ASSERTION(!aRegionToPaint.IsEmpty(), "Unexpectedly empty paint region!");
  nsIntRect paintBounds = aRegionToPaint.GetBounds();

  int startX, incX, startY, incY;
  int tileLength = GetScaledTileLength();
//.........这里部分代码省略.........