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/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrPlotMgr_DEFINED
#define GrPlotMgr_DEFINED
#include "GrTypes.h"
#include "SkTypes.h"
class GrPlotMgr : SkNoncopyable {
public:
GrPlotMgr(int width, int height) {
fDim.set(width, height);
size_t needed = width * height;
if (needed <= sizeof(fStorage)) {
fBusy = fStorage;
} else {
fBusy = SkNEW_ARRAY(char, needed);
}
this->reset();
}
~GrPlotMgr() {
if (fBusy != fStorage) {
delete[] fBusy;
}
}
void reset() {
sk_bzero(fBusy, fDim.fX * fDim.fY);
}
bool newPlot(SkIPoint16* loc) {
char* busy = fBusy;
for (int y = 0; y < fDim.fY; y++) {
for (int x = 0; x < fDim.fX; x++) {
if (!*busy) {
*busy = true;
loc->set(x, y);
return true;
}
busy++;
}
}
return false;
}
bool isBusy(int x, int y) const {
SkASSERT((unsigned)x < (unsigned)fDim.fX);
SkASSERT((unsigned)y < (unsigned)fDim.fY);
return fBusy[y * fDim.fX + x] != 0;
}
void freePlot(int x, int y) {
SkASSERT((unsigned)x < (unsigned)fDim.fX);
SkASSERT((unsigned)y < (unsigned)fDim.fY);
fBusy[y * fDim.fX + x] = false;
}
private:
enum {
STORAGE = 64
};
char fStorage[STORAGE];
char* fBusy;
SkIPoint16 fDim;
};
#endif
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