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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "config.h"
      6 #include "platform/graphics/CompositingReasons.h"
      7 
      8 #include "wtf/StdLibExtras.h"
      9 
     10 namespace blink {
     11 
     12 const CompositingReasonStringMap kCompositingReasonStringMap[] = {
     13     { CompositingReasonNone,
     14         "Unknown",
     15         "No reason given" },
     16     { CompositingReason3DTransform,
     17         "transform3D",
     18         "Has a 3d transform" },
     19     { CompositingReasonVideo,
     20         "video",
     21         "Is an accelerated video" },
     22     { CompositingReasonCanvas,
     23         "canvas",
     24         "Is an accelerated canvas" },
     25     { CompositingReasonPlugin,
     26         "plugin",
     27         "Is an accelerated plugin" },
     28     { CompositingReasonIFrame,
     29         "iFrame",
     30         "Is an accelerated iFrame" },
     31     { CompositingReasonBackfaceVisibilityHidden,
     32         "backfaceVisibilityHidden",
     33         "Has backface-visibility: hidden" },
     34     { CompositingReasonActiveAnimation,
     35         "activeAnimation",
     36         "Has an active accelerated animation or transition" },
     37     { CompositingReasonTransitionProperty,
     38         "transitionProperty",
     39         "Has an acceleratable transition property (active or inactive)" },
     40     { CompositingReasonPositionFixed,
     41         "positionFixed",
     42         "Is fixed position" },
     43     { CompositingReasonOverflowScrollingTouch,
     44         "overflowScrollingTouch",
     45         "Is a scrollable overflow element" },
     46     { CompositingReasonOverflowScrollingParent,
     47         "overflowScrollingParent",
     48         "Scroll parent is not an ancestor" },
     49     { CompositingReasonOutOfFlowClipping,
     50         "outOfFlowClipping",
     51         "Has clipping ancestor" },
     52     { CompositingReasonVideoOverlay,
     53         "videoOverlay",
     54         "Is overlay controls for video" },
     55     { CompositingReasonWillChangeCompositingHint,
     56         "willChange",
     57         "Has a will-change compositing hint" },
     58     { CompositingReasonAssumedOverlap,
     59         "assumedOverlap",
     60         "Might overlap other composited content" },
     61     { CompositingReasonOverlap,
     62         "overlap",
     63         "Overlaps other composited content" },
     64     { CompositingReasonNegativeZIndexChildren,
     65         "negativeZIndexChildren",
     66         "Parent with composited negative z-index content" },
     67     { CompositingReasonScrollsWithRespectToSquashingLayer,
     68         "scrollsWithRespectToSquashingLayer",
     69         "Cannot be squashed since this layer scrolls with respect to the squashing layer" },
     70     { CompositingReasonSquashingSparsityExceeded,
     71         "squashingSparsityExceeded",
     72         "Cannot be squashed as the squashing layer would become too sparse" },
     73     { CompositingReasonSquashingClippingContainerMismatch,
     74         "squashingClippingContainerMismatch",
     75         "Cannot be squashed because this layer has a different clipping container than the squashing layer" },
     76     { CompositingReasonSquashingOpacityAncestorMismatch,
     77         "squashingOpacityAncestorMismatch",
     78         "Cannot be squashed because this layer has a different opacity ancestor than the squashing layer" },
     79     { CompositingReasonSquashingTransformAncestorMismatch,
     80         "squashingTransformAncestorMismatch",
     81         "Cannot be squashed because this layer has a different transform ancestor than the squashing layer" },
     82     { CompositingReasonSquashingFilterMismatch,
     83         "squashingFilterAncestorMismatch",
     84         "Cannot be squashed because this layer has a different filter ancestor than the squashing layer, or this layer has a filter" },
     85     { CompositingReasonSquashingWouldBreakPaintOrder,
     86         "squashingWouldBreakPaintOrder",
     87         "Cannot be squashed without breaking paint order" },
     88     { CompositingReasonSquashingVideoIsDisallowed,
     89         "squashingVideoIsDisallowed",
     90         "Squashing video is not supported" },
     91     { CompositingReasonSquashedLayerClipsCompositingDescendants,
     92         "squashedLayerClipsCompositingDescendants",
     93         "Squashing a layer that clips composited descendants is not supported." },
     94     { CompositingReasonSquashingRenderPartIsDisallowed,
     95         "squashingRenderPartIsDisallowed",
     96         "Squashing a frame, iframe or plugin is not supported." },
     97     { CompositingReasonSquashingReflectionIsDisallowed,
     98         "squashingReflectionDisallowed",
     99         "Squashing a element with a reflection is not supported." },
    100     { CompositingReasonSquashingBlendingIsDisallowed,
    101         "squashingBlendingDisallowed",
    102         "Squashing a layer with blending is not supported." },
    103     { CompositingReasonTransformWithCompositedDescendants,
    104         "transformWithCompositedDescendants",
    105         "Has a transform that needs to be known by compositor because of composited descendants" },
    106     { CompositingReasonOpacityWithCompositedDescendants,
    107         "opacityWithCompositedDescendants",
    108         "Has opacity that needs to be applied by compositor because of composited descendants" },
    109     { CompositingReasonMaskWithCompositedDescendants,
    110         "maskWithCompositedDescendants",
    111         "Has a mask that needs to be known by compositor because of composited descendants" },
    112     { CompositingReasonReflectionWithCompositedDescendants,
    113         "reflectionWithCompositedDescendants",
    114         "Has a reflection that needs to be known by compositor because of composited descendants" },
    115     { CompositingReasonFilterWithCompositedDescendants,
    116         "filterWithCompositedDescendants",
    117         "Has a filter effect that needs to be known by compositor because of composited descendants" },
    118     { CompositingReasonBlendingWithCompositedDescendants,
    119         "blendingWithCompositedDescendants",
    120         "Has a blenidng effect that needs to be known by compositor because of composited descendants" },
    121     { CompositingReasonClipsCompositingDescendants,
    122         "clipsCompositingDescendants",
    123         "Has a clip that needs to be known by compositor because of composited descendants" },
    124     { CompositingReasonPerspectiveWith3DDescendants,
    125         "perspectiveWith3DDescendants",
    126         "Has a perspective transform that needs to be known by compositor because of 3d descendants" },
    127     { CompositingReasonPreserve3DWith3DDescendants,
    128         "preserve3DWith3DDescendants",
    129         "Has a preserves-3d property that needs to be known by compositor because of 3d descendants" },
    130     { CompositingReasonReflectionOfCompositedParent,
    131         "reflectionOfCompositedParent",
    132         "Is a reflection of a composited layer" },
    133     { CompositingReasonIsolateCompositedDescendants,
    134         "isolateCompositedDescendants",
    135         "Should isolate descendants to apply a blend effect" },
    136     { CompositingReasonRoot,
    137         "root",
    138         "Is the root layer" },
    139     { CompositingReasonLayerForAncestorClip,
    140         "layerForAncestorClip",
    141         "Secondary layer, applies a clip due to a sibling in the compositing tree" },
    142     { CompositingReasonLayerForDescendantClip,
    143         "layerForDescendantClip",
    144         "Secondary layer, to clip descendants of the owning layer" },
    145     { CompositingReasonLayerForPerspective,
    146         "layerForPerspective",
    147         "Secondary layer, to house the perspective transform for all descendants" },
    148     { CompositingReasonLayerForHorizontalScrollbar,
    149         "layerForHorizontalScrollbar",
    150         "Secondary layer, the horizontal scrollbar layer" },
    151     { CompositingReasonLayerForVerticalScrollbar,
    152         "layerForVerticalScrollbar",
    153         "Secondary layer, the vertical scrollbar layer" },
    154     { CompositingReasonLayerForOverflowControlsHost,
    155         "layerForOverflowControlsHost",
    156         "Secondary layer, the overflow controls host layer" },
    157     { CompositingReasonLayerForScrollCorner,
    158         "layerForScrollCorner",
    159         "Secondary layer, the scroll corner layer" },
    160     { CompositingReasonLayerForScrollingContents,
    161         "layerForScrollingContents",
    162         "Secondary layer, to house contents that can be scrolled" },
    163     { CompositingReasonLayerForScrollingContainer,
    164         "layerForScrollingContainer",
    165         "Secondary layer, used to position the scolling contents while scrolling" },
    166     { CompositingReasonLayerForSquashingContents,
    167         "layerForSquashingContents",
    168         "Secondary layer, home for a group of squashable content" },
    169     { CompositingReasonLayerForSquashingContainer,
    170         "layerForSquashingContainer",
    171         "Secondary layer, no-op layer to place the squashing layer correctly in the composited layer tree" },
    172     { CompositingReasonLayerForForeground,
    173         "layerForForeground",
    174         "Secondary layer, to contain any normal flow and positive z-index contents on top of a negative z-index layer" },
    175     { CompositingReasonLayerForBackground,
    176         "layerForBackground",
    177         "Secondary layer, to contain acceleratable background content" },
    178     { CompositingReasonLayerForMask,
    179         "layerForMask",
    180         "Secondary layer, to contain the mask contents" },
    181     { CompositingReasonLayerForClippingMask,
    182         "layerForClippingMask",
    183         "Secondary layer, for clipping mask" },
    184     { CompositingReasonLayerForScrollingBlockSelection,
    185         "layerForScrollingBlockSelection",
    186         "Secondary layer, to house block selection gaps for composited scrolling with no scrolling contents" },
    187     { CompositingReasonInlineTransform,
    188         "inlineTransform",
    189         "Has an inline transform, which causes subsequent layers to assume overlap" },
    190 };
    191 
    192 size_t kNumberOfCompositingReasons = WTF_ARRAY_LENGTH(kCompositingReasonStringMap);
    193 
    194 } // namespace blink
    195