forked from mirrors/gecko-dev
a9e57a5534
Differential Revision: https://phabricator.services.mozilla.com/D50014 --HG-- extra : moz-landing-system : lando
91 lines
3.4 KiB
C++
91 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_LayerAnimationInfo_h
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#define mozilla_LayerAnimationInfo_h
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#include "nsChangeHint.h"
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#include "nsCSSPropertyID.h"
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#include "nsCSSPropertyIDSet.h"
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#include "nsDisplayItemTypes.h" // For nsDisplayItem::Type
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#include "mozilla/Array.h"
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namespace mozilla {
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struct LayerAnimationInfo {
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// Returns the corresponding display item type for |aProperty| when it is
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// animated on the compositor.
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// Returns DisplayItemType::TYPE_ZERO if |aProperty| cannot be animated on the
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// compositor.
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static DisplayItemType GetDisplayItemTypeForProperty(
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nsCSSPropertyID aProperty);
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// Returns the corresponding CSS properties for |aDisplayItemType|.
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//
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// This function works only for display items tied to CSS properties that can
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// be animated on the compositor.
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static inline const nsCSSPropertyIDSet& GetCSSPropertiesFor(
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DisplayItemType aDisplayItemType) {
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static const nsCSSPropertyIDSet transformProperties =
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nsCSSPropertyIDSet::TransformLikeProperties();
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static const nsCSSPropertyIDSet opacityProperties =
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nsCSSPropertyIDSet{eCSSProperty_opacity};
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static const nsCSSPropertyIDSet backgroundColorProperties =
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nsCSSPropertyIDSet{eCSSProperty_background_color};
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static const nsCSSPropertyIDSet empty = nsCSSPropertyIDSet();
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switch (aDisplayItemType) {
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case DisplayItemType::TYPE_BACKGROUND_COLOR:
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return backgroundColorProperties;
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case DisplayItemType::TYPE_OPACITY:
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return opacityProperties;
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case DisplayItemType::TYPE_TRANSFORM:
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return transformProperties;
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default:
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MOZ_ASSERT_UNREACHABLE(
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"Should not be called for display item types "
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"that are not able to have animations on the "
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"compositor");
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return empty;
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}
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}
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// Returns the appropriate change hint for updating the display item for
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// |aDisplayItemType|.
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//
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// This function works only for display items tied to CSS properties that can
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// be animated on the compositor.
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static inline nsChangeHint GetChangeHintFor(
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DisplayItemType aDisplayItemType) {
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switch (aDisplayItemType) {
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case DisplayItemType::TYPE_BACKGROUND_COLOR:
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return nsChangeHint_RepaintFrame;
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case DisplayItemType::TYPE_OPACITY:
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return nsChangeHint_UpdateOpacityLayer;
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case DisplayItemType::TYPE_TRANSFORM:
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return nsChangeHint_UpdateTransformLayer;
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default:
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MOZ_ASSERT_UNREACHABLE(
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"Should not be called for display item types "
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"that are not able to have animations on the "
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"compositor");
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return nsChangeHint(0);
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}
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}
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// An array of DisplayItemType corresponding to the display item that we can
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// animate on the compositor.
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//
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// This is used to look up the appropriate change hint in cases when
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// animations need updating but no other change hint is generated.
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static const Array<DisplayItemType,
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nsCSSPropertyIDSet::CompositorAnimatableDisplayItemCount()>
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sDisplayItemTypes;
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};
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} // namespace mozilla
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#endif /* !defined(mozilla_LayerAnimationInfo_h) */
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