cull_rect_updater.cc | Explore in Territory

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/renderer/core/paint/cull_rect_updater.h"

#include "base/auto_reset.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/local_frame_view.h"
#include "third_party/blink/renderer/core/frame/pagination_state.h"
#include "third_party/blink/renderer/core/layout/layout_embedded_content.h"
#include "third_party/blink/renderer/core/layout/layout_view.h"
#include "third_party/blink/renderer/core/layout/physical_box_fragment.h"
#include "third_party/blink/renderer/core/paint/fragment_data_iterator.h"
#include "third_party/blink/renderer/core/paint/object_paint_properties.h"
#include "third_party/blink/renderer/core/paint/paint_layer.h"
#include "third_party/blink/renderer/core/paint/paint_layer_paint_order_iterator.h"
#include "third_party/blink/renderer/core/paint/paint_layer_painter.h"
#include "third_party/blink/renderer/core/paint/paint_layer_scrollable_area.h"
#include "third_party/blink/renderer/core/paint/paint_property_tree_builder.h"
#include "third_party/blink/renderer/core/view_transition/view_transition_supplement.h"
#include "third_party/blink/renderer/platform/instrumentation/histogram.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"

namespace blink {

namespace {

float ExpansionRatio(const LayoutObject& object) { … }

FragmentCullRects;
// This is set to non-null when we are updating overridden cull rects for
// special painting. The current cull rects will be saved during the update,
// and will be restored when we exit the OverriddenCullRectScope.
Vector<FragmentCullRects>* g_original_cull_rects = …;

void SetLayerNeedsRepaintOnCullRectChange(PaintLayer& layer) { … }

void SetFragmentCullRect(PaintLayer& layer,
                         FragmentData& fragment,
                         const CullRect& cull_rect) { … }

// Returns true if the contents cull rect changed.
bool SetFragmentContentsCullRect(PaintLayer& layer,
                                 FragmentData& fragment,
                                 const CullRect& contents_cull_rect) { … }

bool ShouldUseInfiniteCullRect(
    const PaintLayer& layer,
    ViewTransitionSupplement* view_transition_supplement,
    bool& subtree_should_use_infinite_cull_rect) { … }

bool HasScrolledEnough(const LayoutObject& object) { … }

}  // anonymous namespace

CullRectUpdater::CullRectUpdater(PaintLayer& starting_layer,
                                 bool disable_expansion)
    : … { … }

void CullRectUpdater::Update() { … }

void CullRectUpdater::UpdateForTesting(const CullRect& input_cull_rect) { … }

void CullRectUpdater::UpdateInternal(const CullRect& input_cull_rect) { … }

// See UpdateForDescendants for how |force_update_self| is propagated.
void CullRectUpdater::UpdateRecursively(const Context& parent_context,
                                        PaintLayer& layer) { … }

// "Children" in |force_update_children| means children in the containing block
// tree. The flag is set by the containing block whose contents cull rect
// changed.
void CullRectUpdater::UpdateForDescendants(const Context& context,
                                           PaintLayer& layer) { … }

bool CullRectUpdater::UpdateForSelf(Context& context, PaintLayer& layer) { … }

CullRect CullRectUpdater::ComputeFragmentCullRect(
    Context& context,
    PaintLayer& layer,
    const FragmentData& fragment,
    const FragmentData& parent_fragment) { … }

CullRect CullRectUpdater::ComputeFragmentContentsCullRect(
    Context& context,
    PaintLayer& layer,
    const FragmentData& fragment,
    const CullRect& cull_rect) { … }

bool CullRectUpdater::ShouldProactivelyUpdate(const Context& context,
                                              const PaintLayer& layer) const { … }

void CullRectUpdater::PaintPropertiesChanged(
    const LayoutObject& object,
    const PaintPropertiesChangeInfo& properties_changed) { … }

bool CullRectUpdater::IsOverridingCullRects() { … }

FragmentCullRects::FragmentCullRects(FragmentData& fragment)
    : … { … }

OverriddenCullRectScope::OverriddenCullRectScope(PaintLayer& starting_layer,
                                                 const CullRect& cull_rect,
                                                 bool disable_expansion) { … }

OverriddenCullRectScope::~OverriddenCullRectScope() { … }

}  // namespace blink
chromium/third_party/blink/renderer/core/paint/cull_rect_updater.cc
