78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
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/*
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* Copyright 2018 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef DDLTileHelper_DEFINED
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#define DDLTileHelper_DEFINED
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#include "SkRect.h"
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#include "SkRefCnt.h"
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#include "SkSurfaceCharacterization.h"
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class DDLPromiseImageHelper;
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class SkCanvas;
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class SkData;
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class SkDeferredDisplayList;
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class SkPicture;
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class SkSurface;
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class SkSurfaceCharacterization;
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class DDLTileHelper {
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public:
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// TileData class encapsulates the information and behavior for a single tile/thread in
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// a DDL rendering.
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class TileData {
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public:
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TileData(sk_sp<SkSurface>, const SkIRect& clip);
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// This method can be invoked in parallel
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// In each thread we will reconvert the compressedPictureData into an SkPicture
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// replacing each image-index with a promise image.
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void createTileSpecificSKP(SkData* compressedPictureData,
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const DDLPromiseImageHelper& helper);
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// This method can be invoked in parallel
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// Create the per-tile DDL from the per-tile SKP
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void createDDL();
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// This method operates serially and replays the recorded DDL into the tile surface.
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void draw();
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// This method also operates serially and composes the results of replaying the DDL into
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// the final destination surface.
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void compose(SkCanvas* dst);
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void reset();
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private:
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sk_sp<SkSurface> fSurface;
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SkSurfaceCharacterization fCharacterization;
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SkIRect fClip; // in the device space of the dest canvas
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sk_sp<SkPicture> fReconstitutedPicture;
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SkTArray<sk_sp<SkImage>> fPromiseImages; // All the promise images in the
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// reconstituted picture
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std::unique_ptr<SkDeferredDisplayList> fDisplayList;
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};
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DDLTileHelper(SkCanvas* canvas, const SkIRect& viewport, int numDivisions);
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void createSKPPerTile(SkData* compressedPictureData, const DDLPromiseImageHelper& helper);
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void createDDLsInParallel();
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void drawAllTilesAndFlush(GrContext*, bool flush);
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void composeAllTiles(SkCanvas* dstCanvas);
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void resetAllTiles();
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private:
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int fNumDivisions; // number of tiles along a side
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SkTArray<TileData> fTiles;
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};
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#endif
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