Disallow squashing for layers with reflections

Source/platform/graphics/CompositingReasons.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CompositingReasons_h
 #define CompositingReasons_h
 
 #include "wtf/MathExtras.h"
 #include <stdint.h>
 
@@ skipping 25 matching lines @@
 const uint64_t CompositingReasonNegativeZIndexChildren                   = UINT64_C(1) << 17;
 const uint64_t CompositingReasonScrollsWithRespectToSquashingLayer       = UINT64_C(1) << 18;
 const uint64_t CompositingReasonSquashingSparsityExceeded                = UINT64_C(1) << 19;
 const uint64_t CompositingReasonSquashingClippingContainerMismatch       = UINT64_C(1) << 20;
 const uint64_t CompositingReasonSquashingOpacityAncestorMismatch         = UINT64_C(1) << 21;
 const uint64_t CompositingReasonSquashingTransformAncestorMismatch       = UINT64_C(1) << 22;
 const uint64_t CompositingReasonSquashingFilterAncestorMismatch          = UINT64_C(1) << 23;
 const uint64_t CompositingReasonSquashingWouldBreakPaintOrder            = UINT64_C(1) << 24;
 const uint64_t CompositingReasonSquashingVideoIsDisallowed               = UINT64_C(1) << 25;
 const uint64_t CompositingReasonSquashedLayerClipsCompositingDescendants = UINT64_C(1) << 26;
-const uint64_t CompositedReasonSquashingRenderPart                       = UINT64_C(1) << 27;
+const uint64_t CompositingReasonSquashingRenderPartIsDisallowed          = UINT64_C(1) << 27;
+const uint64_t CompositingReasonSquashingReflectionIsDisallowed          = UINT64_C(1) << 28;
 
 // Subtree reasons that require knowing what the status of your subtree is before knowing the answer
-const uint64_t CompositingReasonTransformWithCompositedDescendants       = UINT64_C(1) << 28;
-const uint64_t CompositingReasonOpacityWithCompositedDescendants         = UINT64_C(1) << 29;
-const uint64_t CompositingReasonMaskWithCompositedDescendants            = UINT64_C(1) << 30;
-const uint64_t CompositingReasonReflectionWithCompositedDescendants      = UINT64_C(1) << 31;
-const uint64_t CompositingReasonFilterWithCompositedDescendants          = UINT64_C(1) << 32;
-const uint64_t CompositingReasonBlendingWithCompositedDescendants        = UINT64_C(1) << 33;
-const uint64_t CompositingReasonClipsCompositingDescendants              = UINT64_C(1) << 34;
-const uint64_t CompositingReasonPerspectiveWith3DDescendants             = UINT64_C(1) << 35;
-const uint64_t CompositingReasonPreserve3DWith3DDescendants              = UINT64_C(1) << 36;
-const uint64_t CompositingReasonReflectionOfCompositedParent             = UINT64_C(1) << 37;
-const uint64_t CompositingReasonIsolateCompositedDescendants             = UINT64_C(1) << 38;
+const uint64_t CompositingReasonTransformWithCompositedDescendants       = UINT64_C(1) << 29;
+const uint64_t CompositingReasonOpacityWithCompositedDescendants         = UINT64_C(1) << 30;
+const uint64_t CompositingReasonMaskWithCompositedDescendants            = UINT64_C(1) << 31;
+const uint64_t CompositingReasonReflectionWithCompositedDescendants      = UINT64_C(1) << 32;
+const uint64_t CompositingReasonFilterWithCompositedDescendants          = UINT64_C(1) << 33;
+const uint64_t CompositingReasonBlendingWithCompositedDescendants        = UINT64_C(1) << 34;
+const uint64_t CompositingReasonClipsCompositingDescendants              = UINT64_C(1) << 35;
+const uint64_t CompositingReasonPerspectiveWith3DDescendants             = UINT64_C(1) << 36;
+const uint64_t CompositingReasonPreserve3DWith3DDescendants              = UINT64_C(1) << 37;
+const uint64_t CompositingReasonReflectionOfCompositedParent             = UINT64_C(1) << 38;
+const uint64_t CompositingReasonIsolateCompositedDescendants             = UINT64_C(1) << 39;
 
 // The root layer is a special case that may be forced to be a layer, but also it needs to be
 // a layer if anything else in the subtree is composited.
-const uint64_t CompositingReasonRoot                                     = UINT64_C(1) << 39;
+const uint64_t CompositingReasonRoot                                     = UINT64_C(1) << 40;
 
 // CompositedLayerMapping internal hierarchy reasons
-const uint64_t CompositingReasonLayerForAncestorClip                     = UINT64_C(1) << 40;
-const uint64_t CompositingReasonLayerForDescendantClip                   = UINT64_C(1) << 41;
-const uint64_t CompositingReasonLayerForPerspective                      = UINT64_C(1) << 42;
-const uint64_t CompositingReasonLayerForHorizontalScrollbar              = UINT64_C(1) << 43;
-const uint64_t CompositingReasonLayerForVerticalScrollbar                = UINT64_C(1) << 44;
-const uint64_t CompositingReasonLayerForScrollCorner                     = UINT64_C(1) << 45;
-const uint64_t CompositingReasonLayerForScrollingContents                = UINT64_C(1) << 46;
-const uint64_t CompositingReasonLayerForScrollingContainer               = UINT64_C(1) << 47;
-const uint64_t CompositingReasonLayerForSquashingContents                = UINT64_C(1) << 48;
-const uint64_t CompositingReasonLayerForSquashingContainer               = UINT64_C(1) << 49;
-const uint64_t CompositingReasonLayerForForeground                       = UINT64_C(1) << 50;
-const uint64_t CompositingReasonLayerForBackground                       = UINT64_C(1) << 51;
-const uint64_t CompositingReasonLayerForMask                             = UINT64_C(1) << 52;
-const uint64_t CompositingReasonLayerForClippingMask                     = UINT64_C(1) << 53;
-const uint64_t CompositingReasonLayerForScrollingBlockSelection          = UINT64_C(1) << 54;
+const uint64_t CompositingReasonLayerForAncestorClip                     = UINT64_C(1) << 41;
+const uint64_t CompositingReasonLayerForDescendantClip                   = UINT64_C(1) << 42;
+const uint64_t CompositingReasonLayerForPerspective                      = UINT64_C(1) << 43;
+const uint64_t CompositingReasonLayerForHorizontalScrollbar              = UINT64_C(1) << 44;
+const uint64_t CompositingReasonLayerForVerticalScrollbar                = UINT64_C(1) << 45;
+const uint64_t CompositingReasonLayerForScrollCorner                     = UINT64_C(1) << 46;
+const uint64_t CompositingReasonLayerForScrollingContents                = UINT64_C(1) << 47;
+const uint64_t CompositingReasonLayerForScrollingContainer               = UINT64_C(1) << 48;
+const uint64_t CompositingReasonLayerForSquashingContents                = UINT64_C(1) << 49;
+const uint64_t CompositingReasonLayerForSquashingContainer               = UINT64_C(1) << 50;
+const uint64_t CompositingReasonLayerForForeground                       = UINT64_C(1) << 51;
+const uint64_t CompositingReasonLayerForBackground                       = UINT64_C(1) << 52;
+const uint64_t CompositingReasonLayerForMask                             = UINT64_C(1) << 53;
+const uint64_t CompositingReasonLayerForClippingMask                     = UINT64_C(1) << 54;
+const uint64_t CompositingReasonLayerForScrollingBlockSelection          = UINT64_C(1) << 55;
 
 // Various combinations of compositing reasons are defined here also, for more intutive and faster bitwise logic.
 const uint64_t CompositingReasonComboAllDirectReasons =
     CompositingReason3DTransform
     | CompositingReasonVideo
     | CompositingReasonCanvas
     | CompositingReasonPlugin
     | CompositingReasonIFrame
     | CompositingReasonBackfaceVisibilityHidden
     | CompositingReasonActiveAnimation
@@ skipping 40 matching lines @@
     | CompositingReasonNegativeZIndexChildren
     | CompositingReasonScrollsWithRespectToSquashingLayer
     | CompositingReasonSquashingSparsityExceeded
     | CompositingReasonSquashingClippingContainerMismatch
     | CompositingReasonSquashingOpacityAncestorMismatch
     | CompositingReasonSquashingTransformAncestorMismatch
     | CompositingReasonSquashingFilterAncestorMismatch
     | CompositingReasonSquashingWouldBreakPaintOrder
     | CompositingReasonSquashingVideoIsDisallowed
     | CompositingReasonSquashedLayerClipsCompositingDescendants
-    | CompositedReasonSquashingRenderPart
+    | CompositingReasonSquashingRenderPartIsDisallowed
+    | CompositingReasonSquashingReflectionIsDisallowed
     | CompositingReasonTransformWithCompositedDescendants
     | CompositingReasonOpacityWithCompositedDescendants
     | CompositingReasonMaskWithCompositedDescendants
     | CompositingReasonFilterWithCompositedDescendants
     | CompositingReasonBlendingWithCompositedDescendants
     | CompositingReasonIsolateCompositedDescendants
     | CompositingReasonPreserve3DWith3DDescendants; // preserve-3d has to create backing store to ensure that 3d-transformed elements intersect.
 
 const uint64_t CompositingReasonComboSquashableReasons =
     CompositingReasonOverlap
@@ skipping 49 matching lines @@
         "Has an active accelerated animation or transition" },
     { CompositingReasonTransitionProperty,
         "transitionProperty",
         "Has an acceleratable transition property (active or inactive)" },
     { CompositingReasonFilters,
         "filters",
         "Has an accelerated filter" },
     { CompositingReasonPositionFixed,
         "positionFixed",
         "Is fixed position" },
-    { 0, 0, 0 }, // Available.
     { CompositingReasonOverflowScrollingTouch,
         "overflowScrollingTouch",
         "Is a scrollable overflow element" },
     { CompositingReasonOverflowScrollingParent,
         "overflowScrollingParent",
         "Scroll parent is not an ancestor" },
     { CompositingReasonOutOfFlowClipping,
         "outOfFlowClipping",
         "Has clipping ancestor" },
     { CompositingReasonVideoOverlay,
         "videoOverlay",
         "Is overlay controls for video" },
     { CompositingReasonWillChangeCompositingHint,
         "willChange",
         "Has a will-change compositing hint" },
-    { 0, 0, 0 }, // Available.
     { CompositingReasonAssumedOverlap,
         "assumedOverlap",
         "Might overlap other composited content" },
     { CompositingReasonOverlap,
         "overlap",
         "Overlaps other composited content" },
     { CompositingReasonNegativeZIndexChildren,
         "negativeZIndexChildren",
         "Parent with composited negative z-index content" },
     { CompositingReasonScrollsWithRespectToSquashingLayer,
@@ skipping 16 matching lines @@
         "Cannot be squashed because this layer has a different filter ancestor than the squashing layer" },
     { CompositingReasonSquashingWouldBreakPaintOrder,
         "squashingWouldBreakPaintOrder",
         "Cannot be squashed without breaking paint order" },
     { CompositingReasonSquashingVideoIsDisallowed,
         "squashingVideoIsDisallowed",
         "Squashing video is not supported" },
     { CompositingReasonSquashedLayerClipsCompositingDescendants,
         "squashedLayerClipsCompositingDescendants",
         "Squashing a layer that clips composited descendants is not supported." },
-    { CompositedReasonSquashingRenderPart,
-        "sompositedReasonSquashingRenderPart",
+    { CompositingReasonSquashingRenderPartIsDisallowed,
+        "squashingRenderPartIsDisallowed",
         "Squashing a frame, iframe or plugin is not supported." },
+    { CompositingReasonSquashingReflectionIsDisallowed,
+        "squashingReflectionDisallowed",
+        "Squashing a element with a reflection is not supported." },
     { CompositingReasonTransformWithCompositedDescendants,
         "transformWithCompositedDescendants",
         "Has a transform that needs to be known by compositor because of composited descendants" },
     { CompositingReasonOpacityWithCompositedDescendants,
         "opacityWithCompositedDescendants",
         "Has opacity that needs to be applied by compositor because of composited descendants" },
     { CompositingReasonMaskWithCompositedDescendants,
         "maskWithCompositedDescendants",
         "Has a mask that needs to be known by compositor because of composited descendants" },
     { CompositingReasonReflectionWithCompositedDescendants,
@@ skipping 66 matching lines @@
         "layerForClippingMask",
         "Secondary layer, for clipping mask" },
     { CompositingReasonLayerForScrollingBlockSelection,
         "layerForScrollingBlockSelection",
         "Secondary layer, to house block selection gaps for composited scrolling with no scrolling contents" },
 };
 
 } // namespace WebCore
 
 #endif // CompositingReasons_h