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/*
* Copyright (C) 2011-2014 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "IntPointHash.h"
#include "IntRect.h"
#include "PlatformCALayerClient.h"
#include "Timer.h"
#include <wtf/Deque.h>
#include <wtf/HashCountedSet.h>
#include <wtf/HashMap.h>
#include <wtf/Ref.h>
#if USE(CG)
typedef struct CGContext *CGContextRef;
#endif
namespace WebCore {
class GraphicsContext;
class PlatformCALayer;
class TileController;
class TileGrid : public PlatformCALayerClient {
WTF_MAKE_NONCOPYABLE(TileGrid);
WTF_MAKE_FAST_ALLOCATED;
public:
explicit TileGrid(TileController&);
~TileGrid();
#if USE(CA)
PlatformCALayer& containerLayer() { return m_containerLayer; }
#endif
void setIsZoomedOutTileGrid(bool);
void setScale(float);
float scale() const { return m_scale; }
void setNeedsDisplay();
void setNeedsDisplayInRect(const IntRect&);
void dropTilesInRect(const IntRect&);
void updateTileLayerProperties();
bool prepopulateRect(const FloatRect&);
enum ValidationPolicyFlag : uint8_t {
PruneSecondaryTiles = 1 << 0,
UnparentAllTiles = 1 << 1
};
void revalidateTiles(OptionSet<ValidationPolicyFlag> = { });
bool tilesWouldChangeForCoverageRect(const FloatRect&) const;
IntRect tileCoverageRect() const;
IntRect extent() const;
IntSize tileSize() const { return m_tileSize; }
double retainedTileBackingStoreMemory() const;
unsigned blankPixelCount() const;
#if USE(CG)
void drawTileMapContents(CGContextRef, CGRect layerBounds) const;
#endif
#if PLATFORM(IOS_FAMILY)
unsigned numberOfUnparentedTiles() const { return m_cohortList.size(); }
void removeUnparentedTilesNow();
#endif
using TileIndex = IntPoint;
using TileCohort = unsigned;
static constexpr TileCohort visibleTileCohort = std::numeric_limits<TileCohort>::max();
struct TileInfo {
RefPtr<PlatformCALayer> layer;
TileCohort cohort { visibleTileCohort };
bool hasStaleContent { false };
};
private:
void setTileNeedsDisplayInRect(const TileIndex&, TileInfo&, const IntRect& repaintRectInTileCoords, const IntRect& coverageRectInTileCoords);
IntRect rectForTileIndex(const TileIndex&) const;
bool getTileIndexRangeForRect(const IntRect&, TileIndex& topLeft, TileIndex& bottomRight) const;
enum class CoverageType { PrimaryTiles, SecondaryTiles };
IntRect ensureTilesForRect(const FloatRect&, CoverageType);
struct TileCohortInfo {
TileCohort cohort;
MonotonicTime creationTime;
TileCohortInfo(TileCohort inCohort, MonotonicTime inTime)
: cohort(inCohort)
, creationTime(inTime)
{ }
Seconds timeUntilExpiration();
};
void removeAllTiles();
void removeAllSecondaryTiles();
void removeTilesInCohort(TileCohort);
void scheduleCohortRemoval();
void cohortRemovalTimerFired();
TileCohort nextTileCohort() const;
void startedNewCohort(TileCohort);
TileCohort newestTileCohort() const;
TileCohort oldestTileCohort() const;
void removeTiles(const Vector<TileGrid::TileIndex>& toRemove);
// PlatformCALayerClient
void platformCALayerPaintContents(PlatformCALayer*, GraphicsContext&, const FloatRect&, GraphicsLayerPaintBehavior) override;
bool platformCALayerShowDebugBorders() const override;
bool platformCALayerShowRepaintCounter(PlatformCALayer*) const override;
int platformCALayerRepaintCount(PlatformCALayer*) const override;
int platformCALayerIncrementRepaintCount(PlatformCALayer*) override;
bool platformCALayerContentsOpaque() const override;
bool platformCALayerDrawsContent() const override { return true; }
float platformCALayerDeviceScaleFactor() const override;
bool isUsingDisplayListDrawing(PlatformCALayer*) const override;
TileController& m_controller;
#if USE(CA)
Ref<PlatformCALayer> m_containerLayer;
#endif
HashMap<TileIndex, TileInfo> m_tiles;
IntRect m_primaryTileCoverageRect;
Vector<FloatRect> m_secondaryTileCoverageRects;
Deque<TileCohortInfo> m_cohortList;
Timer m_cohortRemovalTimer;
HashCountedSet<PlatformCALayer*> m_tileRepaintCounts;
IntSize m_tileSize;
float m_scale { 1 };
};
}