2 * Copyright 2014 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #ifndef GrPictureUtils_DEFINED
9 #define GrPictureUtils_DEFINED
11 #include "SkPicture.h"
12 #include "SkTDArray.h"
14 // This class encapsulates the GPU-backend-specific acceleration data
15 // for a single SkPicture
16 class GPUAccelData : public SkPicture::AccelData {
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).
24 // The size of the saveLayer
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.
29 // The offset that needs to be passed to drawBitmap to correctly
30 // position the pre-rendered layer.
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.
39 // True if this saveLayer has at least one other saveLayer nested within it.
41 bool fHasNestedLayers;
42 // True if this saveLayer is nested within another. False otherwise.
46 GPUAccelData(Key key) : INHERITED(key) { }
48 virtual ~GPUAccelData() {
49 for (int i = 0; i < fSaveLayerInfo.count(); ++i) {
50 SkDELETE(fSaveLayerInfo[i].fPaint);
54 void addSaveLayerInfo(const SaveLayerInfo& info) {
55 SkASSERT(info.fSaveLayerOpID < info.fRestoreOpID);
56 *fSaveLayerInfo.push() = info;
59 int numSaveLayers() const { return fSaveLayerInfo.count(); }
61 const SaveLayerInfo& saveLayerInfo(int index) const {
62 SkASSERT(index < fSaveLayerInfo.count());
64 return fSaveLayerInfo[index];
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();
72 SkTDArray<SaveLayerInfo> fSaveLayerInfo;
75 typedef SkPicture::AccelData INHERITED;
78 void GatherGPUInfo(SkPicture* pict, GPUAccelData* accelData);
80 #endif // GrPictureUtils_DEFINED