Bug 1021564 - Invalidate filtered frames when they move in certain ways. r=roc

layout/base/nsDisplayList.cpp

@@ -25,6 +25,7 @@
 #include "gfxMatrix.h"
 #include "gfxPrefs.h"
 #include "nsSVGIntegrationUtils.h"
+#include "nsSVGUtils.h"
 #include "nsLayoutUtils.h"
 #include "nsIScrollableFrame.h"
 #include "nsIFrameInlines.h"
@@ -5249,6 +5250,40 @@ bool nsDisplaySVGEffects::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem
   return true;
 }
 
+gfxRect
+nsDisplaySVGEffects::BBoxInUserSpace() const
+{
+  return nsSVGUtils::GetBBox(mFrame);
+}
+
+gfxPoint
+nsDisplaySVGEffects::UserSpaceOffset() const
+{
+  return nsSVGUtils::FrameSpaceInCSSPxToUserSpaceOffset(mFrame);
+}
+
+void
+nsDisplaySVGEffects::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
+                                               const nsDisplayItemGeometry* aGeometry,
+                                               nsRegion* aInvalidRegion)
+{
+  const nsDisplaySVGEffectsGeometry* geometry =
+    static_cast<const nsDisplaySVGEffectsGeometry*>(aGeometry);
+  bool snap;
+  nsRect bounds = GetBounds(aBuilder, &snap);
+  if (geometry->mFrameOffsetToReferenceFrame != ToReferenceFrame() ||
+      geometry->mUserSpaceOffset != UserSpaceOffset() ||
+      !geometry->mBBox.IsEqualInterior(BBoxInUserSpace())) {
+    // Filter and mask output can depend on the location of the frame's user
+    // space and on the frame's BBox. We need to invalidate if either of these
+    // change relative to the reference frame.
+    // Invalidations from our inactive layer manager are not enough to catch
+    // some of these cases because filters can produce output even if there's
+    // nothing in the filter input.
+    aInvalidRegion->Or(bounds, geometry->mBounds);
+  }
+}
+
 #ifdef MOZ_DUMP_PAINTING
 void
 nsDisplaySVGEffects::PrintEffects(nsACString& aTo)

layout/base/nsDisplayList.h

@@ -3132,13 +3132,17 @@ public:
   virtual already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
                                              LayerManager* aManager,
                                              const ContainerLayerParameters& aContainerParameters) MOZ_OVERRIDE;
-  
+
+  gfxRect BBoxInUserSpace() const;
+  gfxPoint UserSpaceOffset() const;
+
+  virtual nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) MOZ_OVERRIDE
+  {
+    return new nsDisplaySVGEffectsGeometry(this, aBuilder);
+  }
   virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
                                          const nsDisplayItemGeometry* aGeometry,
-                                         nsRegion* aInvalidRegion) MOZ_OVERRIDE
-  {
-    // We don't need to compute an invalidation region since we have LayerTreeInvalidation
-  }
+                                         nsRegion* aInvalidRegion) MOZ_OVERRIDE;
 
   void PaintAsLayer(nsDisplayListBuilder* aBuilder,
                     nsRenderingContext* aCtx,

layout/base/nsDisplayListInvalidation.cpp

@@ -95,3 +95,16 @@ nsDisplayBoxShadowInnerGeometry::MoveBy(const nsPoint& aOffset)
   mPaddingRect.MoveBy(aOffset);
 }
 
+nsDisplaySVGEffectsGeometry::nsDisplaySVGEffectsGeometry(nsDisplaySVGEffects* aItem, nsDisplayListBuilder* aBuilder)
+  : nsDisplayItemGeometry(aItem, aBuilder)
+  , mBBox(aItem->BBoxInUserSpace())
+  , mUserSpaceOffset(aItem->UserSpaceOffset())
+  , mFrameOffsetToReferenceFrame(aItem->ToReferenceFrame())
+{}
+
+void
+nsDisplaySVGEffectsGeometry::MoveBy(const nsPoint& aOffset)
+{
+  mBounds.MoveBy(aOffset);
+  mFrameOffsetToReferenceFrame += aOffset;
+}

layout/base/nsDisplayListInvalidation.h

@@ -9,11 +9,13 @@
 #include "mozilla/Attributes.h"
 #include "nsRect.h"
 #include "nsColor.h"
+#include "gfxRect.h"
 
 class nsDisplayItem;
 class nsDisplayListBuilder;
 class nsDisplayBackgroundImage;
 class nsDisplayThemedBackground;
+class nsDisplaySVGEffects;
 
 /**
  * This stores the geometry of an nsDisplayItem, and the area
@@ -130,4 +132,16 @@ public:
   nscolor mColor;
 };
 
+class nsDisplaySVGEffectsGeometry : public nsDisplayItemGeometry
+{
+public:
+  nsDisplaySVGEffectsGeometry(nsDisplaySVGEffects* aItem, nsDisplayListBuilder* aBuilder);
+
+  virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
+
+  gfxRect mBBox;
+  gfxPoint mUserSpaceOffset;
+  nsPoint mFrameOffsetToReferenceFrame;
+};
+
 #endif /*NSDISPLAYLISTINVALIDATION_H_*/

layout/reftests/bugs/1021564-1.html

@@ -0,0 +1,46 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!DOCTYPE html>
+<html lang="en" class="reftest-wait">
+<meta charset="utf-8">
+<title>When the filtered element's BBox relative to the page changes, the filtered element needs to be invalidated</title>
+
+<style>
+
+#spacer {
+  height: 100px;
+}
+
+#filtered {
+  width: 100px;
+  height: 100px;
+  background-color: lime;
+  filter: url(#filter);
+}
+
+</style>
+
+<svg height="0">
+  <defs>
+    <filter id="filter" filterUnits="objectBoundingBox"
+            x="0%" y="0%" width="100%" height="100%"
+            color-interpolation-filters="sRGB">
+      <feMerge><feMergeNode/></feMerge>
+    </filter>
+  </defs>
+</svg>
+
+<div id="spacer"></div>
+
+<div id="filtered"></div>
+
+<script>
+
+window.addEventListener("MozReftestInvalidate", function () {
+  document.getElementById("spacer").style.height = "50px";
+  document.documentElement.removeAttribute("class");
+});
+
+</script>

layout/reftests/bugs/1021564-2.html

@@ -0,0 +1,45 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!DOCTYPE html>
+<html lang="en" class="reftest-wait">
+<meta charset="utf-8">
+<title>When the filtered element's BBox relative to the page changes, the filtered element needs to be invalidated</title>
+
+<style>
+
+#spacer {
+  height: 100px;
+}
+
+#filtered {
+  width: 100px;
+  height: 100px;
+  filter: url(#filter);
+}
+
+</style>
+
+<svg height="0">
+  <defs>
+    <filter id="filter" filterUnits="objectBoundingBox"
+            x="0%" y="0%" width="100%" height="100%"
+            color-interpolation-filters="sRGB">
+      <feFlood flood-color="lime"/>
+    </filter>
+  </defs>
+</svg>
+
+<div id="spacer"></div>
+
+<div id="filtered"></div>
+
+<script>
+
+window.addEventListener("MozReftestInvalidate", function () {
+  document.getElementById("spacer").style.height = "50px";
+  document.documentElement.removeAttribute("class");
+});
+
+</script>

layout/reftests/bugs/1021564-3.html

@@ -0,0 +1,46 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!DOCTYPE html>
+<html lang="en" class="reftest-wait">
+<meta charset="utf-8">
+<title>When the filtered element's BBox relative to the page changes, the filtered element needs to be invalidated</title>
+
+<style>
+
+#spacer {
+  height: 100px;
+}
+
+#filtered {
+  width: 100px;
+  height: 100px;
+  background-color: lime;
+  filter: url(#filter);
+}
+
+</style>
+
+<svg height="0">
+  <defs>
+    <filter id="filter" filterUnits="userSpaceOnUse"
+            x="0" y="0" width="100" height="100"
+            color-interpolation-filters="sRGB">
+      <feMerge><feMergeNode/></feMerge>
+    </filter>
+  </defs>
+</svg>
+
+<div id="spacer"></div>
+
+<div id="filtered"></div>
+
+<script>
+
+window.addEventListener("MozReftestInvalidate", function () {
+  document.getElementById("spacer").style.height = "50px";
+  document.documentElement.removeAttribute("class");
+});
+
+</script>

layout/reftests/bugs/1021564-4.html

@@ -0,0 +1,45 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!DOCTYPE html>
+<html lang="en" class="reftest-wait">
+<meta charset="utf-8">
+<title>When the filtered element's BBox relative to the page changes, the filtered element needs to be invalidated</title>
+
+<style>
+
+#spacer {
+  height: 100px;
+}
+
+#filtered {
+  width: 100px;
+  height: 100px;
+  filter: url(#filter);
+}
+
+</style>
+
+<svg height="0">
+  <defs>
+    <filter id="filter" filterUnits="userSpaceOnUse"
+            x="0" y="0" width="100" height="100"
+            color-interpolation-filters="sRGB">
+      <feFlood flood-color="lime"/>
+    </filter>
+  </defs>
+</svg>
+
+<div id="spacer"></div>
+
+<div id="filtered"></div>
+
+<script>
+
+window.addEventListener("MozReftestInvalidate", function () {
+  document.getElementById("spacer").style.height = "50px";
+  document.documentElement.removeAttribute("class");
+});
+
+</script>

layout/reftests/bugs/1021564-ref.html

@@ -0,0 +1,28 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!DOCTYPE html>
+<html lang="en">
+<meta charset="utf-8">
+<title>When the filtered element's BBox relative to the page changes, the filtered element needs to be invalidated</title>
+
+<style>
+
+#spacer {
+  height: 50px;
+}
+
+#filtered {
+  width: 100px;
+  height: 100px;
+  background-color: lime;
+}
+
+</style>
+
+<svg height="0"></svg>
+
+<div id="spacer"></div>
+
+<div id="filtered"></div>

layout/reftests/bugs/reftest.list

@@ -1812,6 +1812,10 @@ fuzzy-if(/^Windows\x20NT\x206\.2/.test(http.oscpu),1,24) == 991046-1.html 991046
 pref(layout.css.overflow-clip-box.enabled,true) == 992447.html 992447-ref.html
 pref(layout.css.sticky.enabled,true) == 1005405-1.html 1005405-1-ref.html
 pref(layout.css.will-change.enabled,true) == 1018522-1.html 1018522-1-ref.html
+== 1021564-1.html 1021564-ref.html
+== 1021564-2.html 1021564-ref.html
+== 1021564-3.html 1021564-ref.html
+== 1021564-4.html 1021564-ref.html
 pref(browser.display.use_document_fonts,0) == 1022481-1.html 1022481-1-ref.html
 == 1022612-1.html 1022612-1-ref.html
 == 1024473-1.html 1024473-1-ref.html