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// Copyright 2016 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 THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_OBJECT_PAINT_INVALIDATOR_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_OBJECT_PAINT_INVALIDATOR_H_
#include "base/auto_reset.h"
#include "base/macros.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/graphics/paint/display_item_client.h"
#include "third_party/blink/renderer/platform/graphics/paint_invalidation_reason.h"
#include "third_party/blink/renderer/platform/instrumentation/tracing/trace_event.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
namespace blink {
class LayoutObject;
struct PaintInvalidatorContext;
class CORE_EXPORT ObjectPaintInvalidator {
STACK_ALLOCATED();
public:
ObjectPaintInvalidator(const LayoutObject& object) : object_(object) {}
// This calls LayoutObject::PaintingLayer() which walks up the tree.
// If possible, use the faster
// PaintInvalidatorContext.painting_layer.SetNeedsRepaint() instead.
void SlowSetPaintingLayerNeedsRepaint();
void SlowSetPaintingLayerNeedsRepaintAndInvalidateDisplayItemClient(
const DisplayItemClient& client,
PaintInvalidationReason reason) {
SlowSetPaintingLayerNeedsRepaint();
InvalidateDisplayItemClient(client, reason);
}
// The caller should ensure the painting layer has been SetNeedsRepaint
// before calling this function.
void InvalidateDisplayItemClient(const DisplayItemClient& client,
PaintInvalidationReason reason) {
#if DCHECK_IS_ON()
// It's caller's responsibility to ensure PaintingLayer's NeedsRepaint is
// set. Don't set the flag here because getting PaintLayer has cost and the
// caller can use various ways (e.g.
// PaintInvalidatinContext::painting_layer) to reduce the cost.
CheckPaintLayerNeedsRepaint();
#endif
TRACE_EVENT_INSTANT2(TRACE_DISABLED_BY_DEFAULT("blink.invalidation"),
"InvalidateDisplayItemClient",
TRACE_EVENT_SCOPE_GLOBAL, "client",
client.DebugName().Utf8(), "reason",
PaintInvalidationReasonToString(reason));
client.Invalidate(reason);
}
void InvalidatePaintIncludingNonCompositingDescendants();
void InvalidatePaintIncludingNonSelfPaintingLayerDescendants();
protected:
#if DCHECK_IS_ON()
void CheckPaintLayerNeedsRepaint();
#endif
const LayoutObject& object_;
};
class ObjectPaintInvalidatorWithContext : public ObjectPaintInvalidator {
public:
ObjectPaintInvalidatorWithContext(const LayoutObject& object,
const PaintInvalidatorContext& context)
: ObjectPaintInvalidator(object), context_(context) {}
void InvalidatePaint() {
InvalidatePaintWithComputedReason(ComputePaintInvalidationReason());
}
PaintInvalidationReason ComputePaintInvalidationReason();
void InvalidatePaintWithComputedReason(PaintInvalidationReason);
private:
PaintInvalidationReason InvalidateSelection(PaintInvalidationReason);
PaintInvalidationReason InvalidatePartialRect(PaintInvalidationReason);
const PaintInvalidatorContext& context_;
};
} // namespace blink
#endif
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