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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_DRAWING_DISPLAY_ITEM_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_PAINT_DRAWING_DISPLAY_ITEM_H_
#include "base/check_op.h"
#include "base/compiler_specific.h"
#include "third_party/blink/renderer/platform/graphics/paint/display_item.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_record.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "ui/gfx/geometry/rect.h"
namespace blink {
// DrawingDisplayItem contains recorded painting operations which can be
// replayed to produce a rastered output.
class PLATFORM_EXPORT DrawingDisplayItem : public DisplayItem {
public:
DISABLE_CFI_PERF
DrawingDisplayItem(DisplayItemClientId client_id,
Type type,
const gfx::Rect& visual_rect,
PaintRecord record,
RasterEffectOutset raster_effect_outset,
PaintInvalidationReason paint_invalidation_reason =
PaintInvalidationReason::kJustCreated);
const PaintRecord& GetPaintRecord() const {
DCHECK(!IsTombstone());
return record_;
}
gfx::Rect RectKnownToBeOpaque() const;
struct BackgroundColorInfo {
SkColor4f color = SkColors::kTransparent;
float area = 0;
bool is_solid_color = false;
};
BackgroundColorInfo BackgroundColor() const;
private:
friend class DisplayItem;
bool EqualsForUnderInvalidationImpl(const DrawingDisplayItem&) const;
#if DCHECK_IS_ON()
void PropertiesAsJSONImpl(JSONObject&) const {}
#endif
// Status of RectKnownToBeOpaque(). kOther means recalculation.
enum class Opaqueness { kOther, kFull, kNone };
Opaqueness GetOpaqueness() const {
return static_cast<Opaqueness>(opaqueness_);
}
void SetOpaqueness(Opaqueness opaqueness) const {
opaqueness_ = static_cast<unsigned>(opaqueness);
DCHECK_EQ(GetOpaqueness(), opaqueness);
}
gfx::Rect CalculateRectKnownToBeOpaque() const;
gfx::Rect CalculateRectKnownToBeOpaqueForRecord(const PaintRecord&) const;
// Improve the visual rect using the paint record. This can improve solid
// color analysis in cases when the painted content was snapped but the
// visual rect was not. Check |ShouldTightenVisualRect| before calling.
static gfx::Rect TightenVisualRect(const gfx::Rect& visual_rect,
const PaintRecord& record);
static bool ShouldTightenVisualRect(const PaintRecord& record) {
// We only have an optimization to tighten the visual rect for a single op.
return record.size() == 1;
}
const PaintRecord record_;
};
// TODO(dcheng): Move this ctor back inline once the clang plugin is fixed.
DISABLE_CFI_PERF
inline DrawingDisplayItem::DrawingDisplayItem(
DisplayItemClientId client_id,
Type type,
const gfx::Rect& visual_rect,
PaintRecord record,
RasterEffectOutset raster_effect_outset,
PaintInvalidationReason paint_invalidation_reason)
: DisplayItem(
client_id,
type,
[&] {
if (ShouldTightenVisualRect(record)) [[unlikely]] {
return TightenVisualRect(visual_rect, record);
}
return visual_rect;
}(),
raster_effect_outset,
paint_invalidation_reason,
/* draws_content*/ !record.empty()),
record_(std::move(record)) {
DCHECK(IsDrawing());
DCHECK_EQ(GetOpaqueness(), Opaqueness::kOther);
}
inline gfx::Rect DrawingDisplayItem::RectKnownToBeOpaque() const {
if (GetOpaqueness() == Opaqueness::kFull)
return VisualRect();
if (GetOpaqueness() == Opaqueness::kNone)
return gfx::Rect();
return CalculateRectKnownToBeOpaque();
}
template <>
struct DowncastTraits<DrawingDisplayItem> {
static bool AllowFrom(const DisplayItem& i) {
return !i.IsTombstone() && i.IsDrawing();
}
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_PAINT_DRAWING_DISPLAY_ITEM_H_
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