1 /* 2 * Copyright 2014 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 SkLayerInfo_DEFINED 9 #define SkLayerInfo_DEFINED 10 11 #include "SkBigPicture.h" 12 #include "SkTArray.h" 13 14 // This class stores information about the saveLayer/restore pairs found 15 // within an SkPicture. It is used by Ganesh to perform layer hoisting. 16 class SkLayerInfo : public SkBigPicture::AccelData { 17 public: 18 // Information about a given saveLayer/restore block in an SkPicture 19 class BlockInfo { 20 public: BlockInfo()21 BlockInfo() : fPicture(nullptr), fPaint(nullptr), fKey(nullptr), fKeySize(0) {} ~BlockInfo()22 ~BlockInfo() { 23 SkSafeUnref(fPicture); 24 delete fPaint; 25 delete[] fKey; 26 } 27 28 // The picture owning the layer. If the owning picture is the top-most 29 // one (i.e., the picture for which this SkLayerInfo was created) then 30 // this pointer is nullptr. If it is a nested picture then the pointer 31 // is non-nullptr and owns a ref on the picture. 32 const SkPicture* fPicture; 33 // The device space bounds of this layer. 34 SkRect fBounds; 35 // If not-empty, the optional bounds parameter passed in to the saveLayer 36 // call. 37 SkRect fSrcBounds; 38 // The pre-matrix begins as the identity and accumulates the transforms 39 // of the containing SkPictures (if any). This matrix state has to be 40 // part of the initial matrix during replay so that it will be 41 // preserved across setMatrix calls. 42 SkMatrix fPreMat; 43 // The matrix state (in the leaf picture) in which this layer's draws 44 // must occur. It will/can be overridden by setMatrix calls in the 45 // layer itself. It does not include the translation needed to map the 46 // layer's top-left point to the origin (which must be part of the 47 // initial matrix). 48 SkMatrix fLocalMat; 49 // The paint to use on restore. Can be nullptr since it is optional. 50 const SkPaint* fPaint; 51 // The index of this saveLayer in the picture. 52 size_t fSaveLayerOpID; 53 // The index of the matching restore in the picture. 54 size_t fRestoreOpID; 55 // True if this saveLayer has at least one other saveLayer nested within it. 56 // False otherwise. 57 bool fHasNestedLayers; 58 // True if this saveLayer is nested within another. False otherwise. 59 bool fIsNested; 60 // The variable length key for this saveLayer block. It stores the 61 // thread of drawPicture and saveLayer operation indices that lead to this 62 // saveLayer (including its own op index). The BlockInfo owns this memory. 63 int* fKey; 64 int fKeySize; // # of ints 65 }; 66 SkLayerInfo()67 SkLayerInfo() {} 68 addBlock()69 BlockInfo& addBlock() { return fBlocks.push_back(); } 70 numBlocks()71 int numBlocks() const { return fBlocks.count(); } 72 block(int index)73 const BlockInfo& block(int index) const { 74 SkASSERT(index < fBlocks.count()); 75 76 return fBlocks[index]; 77 } 78 79 private: 80 SkTArray<BlockInfo, true> fBlocks; 81 82 typedef SkBigPicture::AccelData INHERITED; 83 }; 84 85 #endif // SkLayerInfo_DEFINED 86