Bug 1295094 - Part 11. Implement nsDisplayFilter. r=mstange

MozReview-Commit-ID: 1V6dxJsejsi

--HG--
extra : rebase_source : 713cf1375c950644cda8dafa96b7227d9ebf2c89

layout/base/nsDisplayItemTypesList.h

@@ -52,6 +52,7 @@ DECLARE_DISPLAY_ITEM_TYPE(SELECTION_OVERLAY)
 DECLARE_DISPLAY_ITEM_TYPE(SOLID_COLOR)
 DECLARE_DISPLAY_ITEM_TYPE(SUBDOCUMENT)
 DECLARE_DISPLAY_ITEM_TYPE(MASK)
+DECLARE_DISPLAY_ITEM_TYPE(FILTER)
 DECLARE_DISPLAY_ITEM_TYPE(SVG_GLYPHS)
 DECLARE_DISPLAY_ITEM_TYPE(SVG_OUTER_SVG)
 DECLARE_DISPLAY_ITEM_TYPE(SVG_PATH_GEOMETRY)

layout/base/nsDisplayList.cpp

@@ -6677,22 +6677,6 @@ nsDisplaySVGEffects::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect
   }
 }
 
-bool nsDisplaySVGEffects::ComputeVisibility(nsDisplayListBuilder* aBuilder,
-                                              nsRegion* aVisibleRegion) {
-  nsPoint offset = ToReferenceFrame();
-  nsRect dirtyRect =
-    nsSVGIntegrationUtils::GetRequiredSourceForInvalidArea(mFrame,
-                                                           mVisibleRect - offset) +
-    offset;
-
-  // Our children may be made translucent or arbitrarily deformed so we should
-  // not allow them to subtract area from aVisibleRegion.
-  nsRegion childrenVisible(dirtyRect);
-  nsRect r = dirtyRect.Intersect(mList.GetBounds(aBuilder));
-  mList.ComputeVisibilityForSublist(aBuilder, &childrenVisible, r);
-  return true;
-}
-
 gfxRect
 nsDisplaySVGEffects::BBoxInUserSpace() const
 {
@@ -6826,6 +6810,16 @@ nsDisplayMask::GetLayerState(nsDisplayListBuilder* aBuilder,
   return LAYER_SVG_EFFECTS;
 }
 
+bool nsDisplayMask::ComputeVisibility(nsDisplayListBuilder* aBuilder,
+                                              nsRegion* aVisibleRegion) {
+  // Our children may be made translucent or arbitrarily deformed so we should
+  // not allow them to subtract area from aVisibleRegion.
+  nsRegion childrenVisible(mVisibleRect);
+  nsRect r = mVisibleRect.Intersect(mList.GetBounds(aBuilder));
+  mList.ComputeVisibilityForSublist(aBuilder, &childrenVisible, r);
+  return true;
+}
+
 void
 nsDisplayMask::PaintAsLayer(nsDisplayListBuilder* aBuilder,
                             nsRenderingContext* aCtx,
@@ -6885,3 +6879,140 @@ nsDisplayMask::PrintEffects(nsACString& aTo)
 }
 #endif
 
+nsDisplayFilter::nsDisplayFilter(nsDisplayListBuilder* aBuilder,
+                                         nsIFrame* aFrame, nsDisplayList* aList,
+                                         bool aOpacityItemCreated)
+  : nsDisplaySVGEffects(aBuilder, aFrame, aList, aOpacityItemCreated)
+{
+  MOZ_COUNT_CTOR(nsDisplayFilter);
+}
+
+#ifdef NS_BUILD_REFCNT_LOGGING
+nsDisplayFilter::~nsDisplayFilter()
+{
+  MOZ_COUNT_DTOR(nsDisplayFilter);
+}
+#endif
+
+already_AddRefed<Layer>
+nsDisplayFilter::BuildLayer(nsDisplayListBuilder* aBuilder,
+                           LayerManager* aManager,
+                           const ContainerLayerParameters& aContainerParameters)
+{
+  if (!ValidateSVGFrame()) {
+    return nullptr;
+  }
+
+  if (mFrame->StyleEffects()->mOpacity == 0.0f && !mOpacityItemCreated) {
+    return nullptr;
+  }
+
+  nsIFrame* firstFrame =
+    nsLayoutUtils::FirstContinuationOrIBSplitSibling(mFrame);
+  nsSVGEffects::EffectProperties effectProperties =
+    nsSVGEffects::GetEffectProperties(firstFrame);
+
+  ContainerLayerParameters newContainerParameters = aContainerParameters;
+  if (effectProperties.HasValidFilter()) {
+    newContainerParameters.mDisableSubpixelAntialiasingInDescendants = true;
+  }
+
+  RefPtr<ContainerLayer> container = aManager->GetLayerBuilder()->
+    BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList,
+                           newContainerParameters, nullptr);
+
+  return container.forget();
+}
+
+bool nsDisplayFilter::TryMerge(nsDisplayItem* aItem)
+{
+  if (aItem->GetType() != TYPE_FILTER) {
+    return false;
+  }
+
+  // items for the same content element should be merged into a single
+  // compositing group.
+  // aItem->Frame() returns non-null because it's nsDisplayFilter
+  if (aItem->Frame()->GetContent() != mFrame->GetContent()) {
+    return false;
+  }
+  if (aItem->GetClip() != GetClip()) {
+    return false;
+  }
+  if (aItem->ScrollClip() != ScrollClip()) {
+    return false;
+  }
+
+  nsDisplayFilter* other = static_cast<nsDisplayFilter*>(aItem);
+  MergeFromTrackingMergedFrames(other);
+  mEffectsBounds.UnionRect(mEffectsBounds,
+    other->mEffectsBounds + other->mFrame->GetOffsetTo(mFrame));
+
+  return true;
+}
+
+LayerState
+nsDisplayFilter::GetLayerState(nsDisplayListBuilder* aBuilder,
+                               LayerManager* aManager,
+                               const ContainerLayerParameters& aParameters)
+{
+  return LAYER_SVG_EFFECTS;
+}
+
+bool nsDisplayFilter::ComputeVisibility(nsDisplayListBuilder* aBuilder,
+                                              nsRegion* aVisibleRegion) {
+  nsPoint offset = ToReferenceFrame();
+  nsRect dirtyRect =
+    nsSVGIntegrationUtils::GetRequiredSourceForInvalidArea(mFrame,
+                                                           mVisibleRect - offset) +
+    offset;
+
+  // Our children may be made translucent or arbitrarily deformed so we should
+  // not allow them to subtract area from aVisibleRegion.
+  nsRegion childrenVisible(dirtyRect);
+  nsRect r = dirtyRect.Intersect(mList.GetBounds(aBuilder));
+  mList.ComputeVisibilityForSublist(aBuilder, &childrenVisible, r);
+  return true;
+}
+
+void
+nsDisplayFilter::PaintAsLayer(nsDisplayListBuilder* aBuilder,
+                              nsRenderingContext* aCtx,
+                              LayerManager* aManager)
+{
+  nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize());
+  nsSVGIntegrationUtils::PaintFramesParams params(*aCtx->ThebesContext(),
+                                                  mFrame,  mVisibleRect,
+                                                  borderArea, aBuilder,
+                                                  aManager, mOpacityItemCreated);
+
+  image::DrawResult result =
+    nsSVGIntegrationUtils::PaintFilter(params);
+
+  nsDisplaySVGEffectsGeometry::UpdateDrawResult(this, result);
+}
+
+#ifdef MOZ_DUMP_PAINTING
+void
+nsDisplayFilter::PrintEffects(nsACString& aTo)
+{
+  nsIFrame* firstFrame =
+    nsLayoutUtils::FirstContinuationOrIBSplitSibling(mFrame);
+  nsSVGEffects::EffectProperties effectProperties =
+    nsSVGEffects::GetEffectProperties(firstFrame);
+  bool first = true;
+  aTo += " effects=(";
+  if (mFrame->StyleEffects()->mOpacity != 1.0f) {
+    first = false;
+    aTo += nsPrintfCString("opacity(%f)", mFrame->StyleEffects()->mOpacity);
+  }
+  if (effectProperties.HasValidFilter()) {
+    if (!first) {
+      aTo += ", ";
+    }
+    aTo += "filter";
+    first = false;
+  }
+  aTo += ")";
+}
+#endif

layout/base/nsDisplayList.h

@@ -3801,8 +3801,6 @@ public:
     return mEffectsBounds + ToReferenceFrame();
   }
 
-  virtual bool ComputeVisibility(nsDisplayListBuilder* aBuilder,
-                                 nsRegion* aVisibleRegion) override;
   virtual bool ShouldFlattenAway(nsDisplayListBuilder* aBuilder) override {
     return false;
   }
@@ -3817,7 +3815,6 @@ public:
   virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
                                          const nsDisplayItemGeometry* aGeometry,
                                          nsRegion* aInvalidRegion) override;
-
 protected:
   bool ValidateSVGFrame();
 
@@ -3850,6 +3847,37 @@ public:
                                    LayerManager* aManager,
                                    const ContainerLayerParameters& aParameters) override;
 
+  virtual bool ComputeVisibility(nsDisplayListBuilder* aBuilder,
+                                 nsRegion* aVisibleRegion) override;
+#ifdef MOZ_DUMP_PAINTING
+  void PrintEffects(nsACString& aTo);
+#endif
+
+  void PaintAsLayer(nsDisplayListBuilder* aBuilder,
+                    nsRenderingContext* aCtx,
+                    LayerManager* aManager);
+};
+
+class nsDisplayFilter : public nsDisplaySVGEffects {
+public:
+  nsDisplayFilter(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
+                      nsDisplayList* aList, bool aOpacityItemCreated);
+#ifdef NS_BUILD_REFCNT_LOGGING
+  virtual ~nsDisplayFilter();
+#endif
+
+  NS_DISPLAY_DECL_NAME("Filter", TYPE_FILTER)
+
+  virtual bool TryMerge(nsDisplayItem* aItem) override;
+  virtual already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
+                                             LayerManager* aManager,
+                                             const ContainerLayerParameters& aContainerParameters) override;
+  virtual LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
+                                   LayerManager* aManager,
+                                   const ContainerLayerParameters& aParameters) override;
+
+  virtual bool ComputeVisibility(nsDisplayListBuilder* aBuilder,
+                                 nsRegion* aVisibleRegion) override;
 #ifdef MOZ_DUMP_PAINTING
   void PrintEffects(nsACString& aTo);
 #endif

layout/base/nsLayoutDebugger.cpp

@@ -201,6 +201,12 @@ PrintDisplayItemTo(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem,
     (static_cast<nsDisplayMask*>(aItem))->PrintEffects(str);
     aStream << str.get();
   }
+
+  if (aItem->GetType() == nsDisplayItem::TYPE_FILTER) {
+    nsCString str;
+    (static_cast<nsDisplayFilter*>(aItem))->PrintEffects(str);
+    aStream << str.get();
+  }
 #endif
   aStream << "\n";
 #ifdef MOZ_DUMP_PAINTING