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comparison: gfx/skia/trunk/src/gpu/GrPlotMgr.h
gfx/skia/trunk/src/gpu/GrPlotMgr.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:9ae7c88b11d1 |
|---|---|
| 1 /* | |
| 2 * Copyright 2010 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 GrPlotMgr_DEFINED | |
| 9 #define GrPlotMgr_DEFINED | |
| 10 | |
| 11 #include "GrTypes.h" | |
| 12 #include "GrPoint.h" | |
| 13 #include "SkTypes.h" | |
| 14 | |
| 15 class GrPlotMgr : public SkNoncopyable { | |
| 16 public: | |
| 17 GrPlotMgr(int width, int height) { | |
| 18 fDim.set(width, height); | |
| 19 size_t needed = width * height; | |
| 20 if (needed <= sizeof(fStorage)) { | |
| 21 fBusy = fStorage; | |
| 22 } else { | |
| 23 fBusy = SkNEW_ARRAY(char, needed); | |
| 24 } | |
| 25 this->reset(); | |
| 26 } | |
| 27 | |
| 28 ~GrPlotMgr() { | |
| 29 if (fBusy != fStorage) { | |
| 30 delete[] fBusy; | |
| 31 } | |
| 32 } | |
| 33 | |
| 34 void reset() { | |
| 35 sk_bzero(fBusy, fDim.fX * fDim.fY); | |
| 36 } | |
| 37 | |
| 38 bool newPlot(GrIPoint16* loc) { | |
| 39 char* busy = fBusy; | |
| 40 for (int y = 0; y < fDim.fY; y++) { | |
| 41 for (int x = 0; x < fDim.fX; x++) { | |
| 42 if (!*busy) { | |
| 43 *busy = true; | |
| 44 loc->set(x, y); | |
| 45 return true; | |
| 46 } | |
| 47 busy++; | |
| 48 } | |
| 49 } | |
| 50 return false; | |
| 51 } | |
| 52 | |
| 53 bool isBusy(int x, int y) const { | |
| 54 SkASSERT((unsigned)x < (unsigned)fDim.fX); | |
| 55 SkASSERT((unsigned)y < (unsigned)fDim.fY); | |
| 56 return fBusy[y * fDim.fX + x] != 0; | |
| 57 } | |
| 58 | |
| 59 void freePlot(int x, int y) { | |
| 60 SkASSERT((unsigned)x < (unsigned)fDim.fX); | |
| 61 SkASSERT((unsigned)y < (unsigned)fDim.fY); | |
| 62 fBusy[y * fDim.fX + x] = false; | |
| 63 } | |
| 64 | |
| 65 private: | |
| 66 enum { | |
| 67 STORAGE = 64 | |
| 68 }; | |
| 69 char fStorage[STORAGE]; | |
| 70 char* fBusy; | |
| 71 GrIPoint16 fDim; | |
| 72 }; | |
| 73 | |
| 74 #endif |
