1 2 /* 3 * Copyright 2010 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 11 #ifndef GrPlotMgr_DEFINED 12 #define GrPlotMgr_DEFINED 13 14 #include "GrTypes.h" 15 #include "GrPoint.h" 16 17 class GrPlotMgr : GrNoncopyable { 18 public: GrPlotMgr(int width,int height)19 GrPlotMgr(int width, int height) { 20 fDim.set(width, height); 21 size_t needed = width * height; 22 if (needed <= sizeof(fStorage)) { 23 fBusy = fStorage; 24 } else { 25 fBusy = new char[needed]; 26 } 27 this->reset(); 28 } 29 ~GrPlotMgr()30 ~GrPlotMgr() { 31 if (fBusy != fStorage) { 32 delete[] fBusy; 33 } 34 } 35 reset()36 void reset() { 37 Gr_bzero(fBusy, fDim.fX * fDim.fY); 38 } 39 newPlot(GrIPoint16 * loc)40 bool newPlot(GrIPoint16* loc) { 41 char* busy = fBusy; 42 for (int y = 0; y < fDim.fY; y++) { 43 for (int x = 0; x < fDim.fX; x++) { 44 if (!*busy) { 45 *busy = true; 46 loc->set(x, y); 47 return true; 48 } 49 busy++; 50 } 51 } 52 return false; 53 } 54 isBusy(int x,int y)55 bool isBusy(int x, int y) const { 56 GrAssert((unsigned)x < (unsigned)fDim.fX); 57 GrAssert((unsigned)y < (unsigned)fDim.fY); 58 return fBusy[y * fDim.fX + x] != 0; 59 } 60 freePlot(int x,int y)61 void freePlot(int x, int y) { 62 GrAssert((unsigned)x < (unsigned)fDim.fX); 63 GrAssert((unsigned)y < (unsigned)fDim.fY); 64 fBusy[y * fDim.fX + x] = false; 65 } 66 67 private: 68 enum { 69 STORAGE = 64 70 }; 71 char fStorage[STORAGE]; 72 char* fBusy; 73 GrIPoint16 fDim; 74 }; 75 76 #endif 77 78