1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/gpu/GrPlotMgr.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,74 @@
1.4 +/*
1.5 + * Copyright 2010 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef GrPlotMgr_DEFINED
1.12 +#define GrPlotMgr_DEFINED
1.13 +
1.14 +#include "GrTypes.h"
1.15 +#include "GrPoint.h"
1.16 +#include "SkTypes.h"
1.17 +
1.18 +class GrPlotMgr : public SkNoncopyable {
1.19 +public:
1.20 + GrPlotMgr(int width, int height) {
1.21 + fDim.set(width, height);
1.22 + size_t needed = width * height;
1.23 + if (needed <= sizeof(fStorage)) {
1.24 + fBusy = fStorage;
1.25 + } else {
1.26 + fBusy = SkNEW_ARRAY(char, needed);
1.27 + }
1.28 + this->reset();
1.29 + }
1.30 +
1.31 + ~GrPlotMgr() {
1.32 + if (fBusy != fStorage) {
1.33 + delete[] fBusy;
1.34 + }
1.35 + }
1.36 +
1.37 + void reset() {
1.38 + sk_bzero(fBusy, fDim.fX * fDim.fY);
1.39 + }
1.40 +
1.41 + bool newPlot(GrIPoint16* loc) {
1.42 + char* busy = fBusy;
1.43 + for (int y = 0; y < fDim.fY; y++) {
1.44 + for (int x = 0; x < fDim.fX; x++) {
1.45 + if (!*busy) {
1.46 + *busy = true;
1.47 + loc->set(x, y);
1.48 + return true;
1.49 + }
1.50 + busy++;
1.51 + }
1.52 + }
1.53 + return false;
1.54 + }
1.55 +
1.56 + bool isBusy(int x, int y) const {
1.57 + SkASSERT((unsigned)x < (unsigned)fDim.fX);
1.58 + SkASSERT((unsigned)y < (unsigned)fDim.fY);
1.59 + return fBusy[y * fDim.fX + x] != 0;
1.60 + }
1.61 +
1.62 + void freePlot(int x, int y) {
1.63 + SkASSERT((unsigned)x < (unsigned)fDim.fX);
1.64 + SkASSERT((unsigned)y < (unsigned)fDim.fY);
1.65 + fBusy[y * fDim.fX + x] = false;
1.66 + }
1.67 +
1.68 +private:
1.69 + enum {
1.70 + STORAGE = 64
1.71 + };
1.72 + char fStorage[STORAGE];
1.73 + char* fBusy;
1.74 + GrIPoint16 fDim;
1.75 +};
1.76 +
1.77 +#endif
