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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_PAINT_INVALIDATION_REASON_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_PAINT_INVALIDATION_REASON_H_
#include <stdint.h>
#include <iosfwd>
#include "third_party/blink/renderer/platform/platform_export.h"
namespace blink {
// Reasons of paint invalidation and raster invalidation. A paint invalidation
// reason (<= kLayoutMax) is set in renderer/core (mostly layout and paint)
// on a DisplayItemClient to indicate it will paint differently from the
// previous painted result. During raster invalidation, we use paint
// invalidation reasons as raster invalidation reasons for display items,
// and raster invalidation reasons (> kLayoutMax) for changes such as
// reordering of display item and paint chunks.
enum class PaintInvalidationReason : uint8_t {
kNone,
// This is used for mere size change of LayoutBox that can be invalidated for
// the changed part instead of the whole box.
kIncremental,
// Hit test changes do not require raster invalidation.
kHitTest,
kNonFullMax = kHitTest,
// Non-layout full paint invalidation reasons.
kStyle,
kOutline,
kImage,
kBackplate,
kBackground,
kSelection,
kCaret,
kNonLayoutMax = kCaret,
// Full paint invalidation reasons related to layout changes.
kLayout,
kAppeared,
kDisappeared,
// Scroll bars, scroll corner, etc.
kScrollControl,
// The object is invalidated as a part of a subtree full invalidation (forced
// by LayoutObject::SetSubtreeShouldDoFullPaintInvalidation()).
kSubtree,
kSVGResource,
// TODO(wangxianzhu): This should probably be a non-layout reason.
kDocumentMarker,
kLayoutMax = kDocumentMarker,
// The following are not used for paint invalidation, but for raster
// invalidation only.
// The initial PaintInvalidationReason of a DisplayItemClient.
kJustCreated,
kReordered,
kChunkAppeared,
kChunkDisappeared,
kChunkUncacheable,
kChunkReordered,
kPaintProperty,
// For tracking of direct raster invalidation of full composited layers. The
// invalidation may be implicit, e.g. when a layer is created.
kFullLayer,
// This needs to be the last reason because DisplayItemClient::Invalidate()
// requires this reason to override other reasons.
kUncacheable,
kMax = kUncacheable,
};
PLATFORM_EXPORT const char* PaintInvalidationReasonToString(
PaintInvalidationReason);
inline constexpr bool IsFullPaintInvalidationReason(
PaintInvalidationReason reason) {
return reason > PaintInvalidationReason::kNonFullMax;
}
inline constexpr bool IsNonLayoutFullPaintInvalidationReason(
PaintInvalidationReason reason) {
return reason > PaintInvalidationReason::kNonFullMax &&
reason <= PaintInvalidationReason::kNonLayoutMax;
}
inline constexpr bool IsLayoutFullPaintInvalidationReason(
PaintInvalidationReason reason) {
return reason > PaintInvalidationReason::kNonLayoutMax &&
reason <= PaintInvalidationReason::kLayoutMax;
}
inline constexpr bool IsLayoutPaintInvalidationReason(
PaintInvalidationReason reason) {
return reason == PaintInvalidationReason::kIncremental ||
IsLayoutFullPaintInvalidationReason(reason);
}
PLATFORM_EXPORT std::ostream& operator<<(std::ostream&,
PaintInvalidationReason);
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_PAINT_INVALIDATION_REASON_H_
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