1 /* 2 * Copyright 2018 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef DDLTileHelper_DEFINED 9 #define DDLTileHelper_DEFINED 10 11 #include "SkRect.h" 12 #include "SkRefCnt.h" 13 #include "SkSurfaceCharacterization.h" 14 15 class DDLPromiseImageHelper; 16 class SkCanvas; 17 class SkData; 18 class SkDeferredDisplayList; 19 class SkPicture; 20 class SkSurface; 21 class SkSurfaceCharacterization; 22 23 class DDLTileHelper { 24 public: 25 // TileData class encapsulates the information and behavior for a single tile/thread in 26 // a DDL rendering. 27 class TileData { 28 public: 29 TileData(sk_sp<SkSurface>, const SkIRect& clip); 30 31 // This method can be invoked in parallel 32 // In each thread we will reconvert the compressedPictureData into an SkPicture 33 // replacing each image-index with a promise image. 34 void createTileSpecificSKP(SkData* compressedPictureData, 35 const DDLPromiseImageHelper& helper); 36 37 // This method can be invoked in parallel 38 // Create the per-tile DDL from the per-tile SKP 39 void createDDL(); 40 41 // This method operates serially and replays the recorded DDL into the tile surface. 42 void draw(); 43 44 // This method also operates serially and composes the results of replaying the DDL into 45 // the final destination surface. 46 void compose(SkCanvas* dst); 47 48 void reset(); 49 50 private: 51 sk_sp<SkSurface> fSurface; 52 SkSurfaceCharacterization fCharacterization; 53 SkIRect fClip; // in the device space of the dest canvas 54 sk_sp<SkPicture> fReconstitutedPicture; 55 SkTArray<sk_sp<SkImage>> fPromiseImages; // All the promise images in the 56 // reconstituted picture 57 std::unique_ptr<SkDeferredDisplayList> fDisplayList; 58 }; 59 60 DDLTileHelper(SkCanvas* canvas, const SkIRect& viewport, int numDivisions); 61 62 void createSKPPerTile(SkData* compressedPictureData, const DDLPromiseImageHelper& helper); 63 64 void createDDLsInParallel(); 65 66 void drawAllTilesAndFlush(GrContext*, bool flush); 67 68 void composeAllTiles(SkCanvas* dstCanvas); 69 70 void resetAllTiles(); 71 72 private: 73 int fNumDivisions; // number of tiles along a side 74 SkTArray<TileData> fTiles; 75 }; 76 77 #endif 78
