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