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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: | |
21 SaveLayerInfo() : fPicture(NULL), fPaint(NULL) {} | |
22 ~SaveLayerInfo() { SkSafeUnref(fPicture); SkDELETE(fPaint); } | |
23 | |
24 // The picture owning the layer. If the owning picture is the top-most | |
25 // one (i.e., the picture for which this GrAccelData was created) then | |
26 // this pointer is NULL. If it is a nested picture then the pointer | |
27 // is non-NULL and owns a ref on the picture. | |
28 const SkPicture* fPicture; | |
29 // The device space bounds of this layer. | |
30 SkRect fBounds; | |
31 // The pre-matrix begins as the identity and accumulates the transforms | |
32 // of the containing SkPictures (if any). This matrix state has to be | |
33 // part of the initial matrix during replay so that it will be | |
34 // preserved across setMatrix calls. | |
35 SkMatrix fPreMat; | |
36 // The matrix state (in the leaf picture) in which this layer's draws | |
37 // must occur. It will/can be overridden by setMatrix calls in the | |
38 // layer itself. It does not include the translation needed to map the | |
39 // layer's top-left point to the origin (which must be part of the | |
40 // initial matrix). | |
41 SkMatrix fLocalMat; | |
42 // The paint to use on restore. Can be NULL since it is optional. | |
43 const SkPaint* fPaint; | |
44 // The ID of this saveLayer in the picture. 0 is an invalid ID. | |
45 size_t fSaveLayerOpID; | |
46 // The ID of the matching restore in the picture. 0 is an invalid ID. | |
47 size_t fRestoreOpID; | |
48 // True if this saveLayer has at least one other saveLayer nested within
it. | |
49 // False otherwise. | |
50 bool fHasNestedLayers; | |
51 // True if this saveLayer is nested within another. False otherwise. | |
52 bool fIsNested; | |
53 }; | |
54 | |
55 GrAccelData(Key key) : INHERITED(key) { } | |
56 | |
57 virtual ~GrAccelData() { } | |
58 | |
59 SaveLayerInfo& addSaveLayerInfo() { return fSaveLayerInfo.push_back(); } | |
60 | |
61 int numSaveLayers() const { return fSaveLayerInfo.count(); } | |
62 | |
63 const SaveLayerInfo& saveLayerInfo(int index) const { | |
64 SkASSERT(index < fSaveLayerInfo.count()); | |
65 | |
66 return fSaveLayerInfo[index]; | |
67 } | |
68 | |
69 // We may, in the future, need to pass in the GPUDevice in order to | |
70 // incorporate the clip and matrix state into the key | |
71 static SkPicture::AccelData::Key ComputeAccelDataKey(); | |
72 | |
73 private: | |
74 SkTArray<SaveLayerInfo, true> fSaveLayerInfo; | |
75 | |
76 typedef SkPicture::AccelData INHERITED; | |
77 }; | |
78 | |
79 #endif // GrPictureUtils_DEFINED | |
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