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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.
#include "third_party/blink/renderer/core/paint/frame_painter.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_core.h"
#include "third_party/blink/renderer/core/execution_context/agent.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/layout/layout_embedded_content.h"
#include "third_party/blink/renderer/core/layout/layout_view.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/core/paint/paint_layer.h"
#include "third_party/blink/renderer/core/paint/paint_layer_painter.h"
#include "third_party/blink/renderer/core/paint/timing/frame_paint_timing.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context.h"
#include "third_party/blink/renderer/platform/graphics/paint/drawing_recorder.h"
#include "third_party/blink/renderer/platform/graphics/paint/scoped_display_item_fragment.h"
namespace blink {
bool FramePainter::in_paint_contents_ = false;
void FramePainter::Paint(GraphicsContext& context, PaintFlags paint_flags) {
Document* document = GetFrameView().GetFrame().GetDocument();
if (GetFrameView().ShouldThrottleRendering() || !document->IsActive())
return;
ENTER_EMBEDDER_STATE(document->GetAgent().isolate(),
&GetFrameView().GetFrame(), BlinkState::PAINT);
LayoutView* layout_view = GetFrameView().GetLayoutView();
if (!layout_view) {
DLOG(ERROR) << "called FramePainter::paint with nil layoutObject";
return;
}
// TODO(crbug.com/590856): It's still broken when we choose not to crash when
// the check fails.
if (!GetFrameView().CheckDoesNotNeedLayout())
return;
// TODO(pdr): The following should check that the lifecycle is
// DocumentLifecycle::kInPaint but drag images currently violate this.
DCHECK_GE(document->Lifecycle().GetState(),
DocumentLifecycle::kPrePaintClean);
FramePaintTiming frame_paint_timing(context, &GetFrameView().GetFrame());
bool is_top_level_painter = !in_paint_contents_;
in_paint_contents_ = true;
FontCachePurgePreventer font_cache_purge_preventer;
ScopedDisplayItemFragment display_item_fragment(context, 0u);
PaintLayer* root_layer = layout_view->Layer();
#if DCHECK_IS_ON()
layout_view->AssertSubtreeIsLaidOut();
LayoutObject::SetLayoutNeededForbiddenScope forbid_set_needs_layout(
root_layer->GetLayoutObject());
#endif
PaintLayerPainter layer_painter(*root_layer);
layer_painter.Paint(context, paint_flags);
// Regions may have changed as a result of the visibility/z-index of element
// changing.
if (document->DraggableRegionsDirty()) {
GetFrameView().UpdateDocumentDraggableRegions();
}
if (is_top_level_painter) {
// Everything that happens after paintContents completions is considered
// to be part of the next frame.
in_paint_contents_ = false;
}
}
const LocalFrameView& FramePainter::GetFrameView() {
DCHECK(frame_view_);
return *frame_view_;
}
} // namespace blink
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