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 GrPictureUtils_DEFINED 9 #define GrPictureUtils_DEFINED 10 11 #include "SkPicture.h" 12 #include "SkTArray.h" 13 14 // This class encapsulates the GPU-backend-specific acceleration data 15 // for a single SkPicture 16 class GrAccelData : public SkPicture::AccelData { 17 public: 18 // Information about a given saveLayer in an SkPicture 19 class SaveLayerInfo { 20 public: SaveLayerInfo()21 SaveLayerInfo() : fPicture(NULL), fPaint(NULL) {} ~SaveLayerInfo()22 ~SaveLayerInfo() { SkSafeUnref(fPicture); SkDELETE(fPaint); } 23 24 // True if the SaveLayerInfo is valid. False if 'fOffset' is 25 // invalid (due to a non-invertible CTM). 26 // TODO: remove fValid 27 bool fValid; 28 // The picture owning the layer. If the owning picture is the top-most 29 // one (i.e., the picture for which this GrAccelData was created) then 30 // this pointer is NULL. If it is a nested picture then the pointer 31 // is non-NULL and owns a ref on the picture. 32 const SkPicture* fPicture; 33 // The size of the saveLayer 34 SkISize fSize; 35 // The matrix state in which this layer's draws must occur. It does not 36 // include the translation needed to map the layer's top-left point to the origin. 37 SkMatrix fOriginXform; 38 // The offset that needs to be passed to drawBitmap to correctly 39 // position the pre-rendered layer. It is in device space. 40 SkIPoint fOffset; 41 // The paint to use on restore. Can be NULL since it is optional. 42 const SkPaint* fPaint; 43 // The ID of this saveLayer in the picture. 0 is an invalid ID. 44 size_t fSaveLayerOpID; 45 // The ID of the matching restore in the picture. 0 is an invalid ID. 46 size_t fRestoreOpID; 47 // True if this saveLayer has at least one other saveLayer nested within it. 48 // False otherwise. 49 bool fHasNestedLayers; 50 // True if this saveLayer is nested within another. False otherwise. 51 bool fIsNested; 52 }; 53 GrAccelData(Key key)54 GrAccelData(Key key) : INHERITED(key) { } 55 ~GrAccelData()56 virtual ~GrAccelData() { } 57 addSaveLayerInfo()58 SaveLayerInfo& addSaveLayerInfo() { return fSaveLayerInfo.push_back(); } 59 numSaveLayers()60 int numSaveLayers() const { return fSaveLayerInfo.count(); } 61 saveLayerInfo(int index)62 const SaveLayerInfo& saveLayerInfo(int index) const { 63 SkASSERT(index < fSaveLayerInfo.count()); 64 65 return fSaveLayerInfo[index]; 66 } 67 68 // We may, in the future, need to pass in the GPUDevice in order to 69 // incorporate the clip and matrix state into the key 70 static SkPicture::AccelData::Key ComputeAccelDataKey(); 71 72 private: 73 SkTArray<SaveLayerInfo, true> fSaveLayerInfo; 74 75 typedef SkPicture::AccelData INHERITED; 76 }; 77 78 const GrAccelData* GPUOptimize(const SkPicture* pict); 79 80 #endif // GrPictureUtils_DEFINED 81