The Tor Browser / file comparison
comparison: gfx/skia/trunk/include/utils/SkPictureUtils.h
gfx/skia/trunk/include/utils/SkPictureUtils.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:89f5f87de538 |
|---|---|
| 1 /* | |
| 2 * Copyright 2012 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 SkPictureUtils_DEFINED | |
| 9 #define SkPictureUtils_DEFINED | |
| 10 | |
| 11 #include "SkPicture.h" | |
| 12 #include "SkTDArray.h" | |
| 13 | |
| 14 class SkData; | |
| 15 struct SkRect; | |
| 16 | |
| 17 class SK_API SkPictureUtils { | |
| 18 public: | |
| 19 /** | |
| 20 * Given a rectangular visible "window" into the picture, return an array | |
| 21 * of SkPixelRefs that might intersect that area. To keep the call fast, | |
| 22 * the returned list is not guaranteed to be exact, so it may miss some, | |
| 23 * and it may return false positives. | |
| 24 * | |
| 25 * The pixelrefs returned in the SkData are already owned by the picture, | |
| 26 * so the returned pointers are only valid while the picture is in scope | |
| 27 * and remains unchanged. | |
| 28 */ | |
| 29 static SkData* GatherPixelRefs(SkPicture* pict, const SkRect& area); | |
| 30 | |
| 31 /** | |
| 32 * SkPixelRefContainer provides a base class for more elaborate pixel ref | |
| 33 * query structures (e.g., rtrees, quad-trees, etc.) | |
| 34 */ | |
| 35 class SkPixelRefContainer : public SkRefCnt { | |
| 36 public: | |
| 37 virtual void add(SkPixelRef* pr, const SkRect& rect) = 0; | |
| 38 | |
| 39 // The returned array may contain duplicates | |
| 40 virtual void query(const SkRect& queryRect, SkTDArray<SkPixelRef*> *result) = 0; | |
| 41 | |
| 42 private: | |
| 43 typedef SkRefCnt INHERITED; | |
| 44 }; | |
| 45 | |
| 46 // Simple query structure that just stores a linked list of pixel refs | |
| 47 // and rects. | |
| 48 class SkPixelRefsAndRectsList : public SkPixelRefContainer { | |
| 49 public: | |
| 50 virtual void add(SkPixelRef* pr, const SkRect& rect) SK_OVERRIDE { | |
| 51 PixelRefAndRect *dst = fArray.append(); | |
| 52 | |
| 53 dst->fPixelRef = pr; | |
| 54 dst->fRect = rect; | |
| 55 } | |
| 56 | |
| 57 virtual void query(const SkRect& queryRect, SkTDArray<SkPixelRef*> *result) SK_OVERRIDE { | |
| 58 for (int i = 0; i < fArray.count(); ++i) { | |
| 59 if (SkRect::Intersects(fArray[i].fRect, queryRect)) { | |
| 60 *result->append() = fArray[i].fPixelRef; | |
| 61 } | |
| 62 } | |
| 63 } | |
| 64 | |
| 65 private: | |
| 66 struct PixelRefAndRect { | |
| 67 SkPixelRef* fPixelRef; | |
| 68 SkRect fRect; | |
| 69 }; | |
| 70 | |
| 71 SkTDArray<PixelRefAndRect> fArray; | |
| 72 | |
| 73 typedef SkPixelRefContainer INHERITED; | |
| 74 }; | |
| 75 | |
| 76 /** | |
| 77 * Fill the provided pixel ref container with the picture's pixel ref | |
| 78 * and rect information. | |
| 79 */ | |
| 80 static void GatherPixelRefsAndRects(SkPicture* pict, SkPixelRefContainer* prCont); | |
| 81 }; | |
| 82 | |
| 83 #endif |
