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 75
