mirror of https://github.com/axmolengine/axmol.git
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
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/*
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Copyright 2010 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef GrPlotMgr_DEFINED
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#define GrPlotMgr_DEFINED
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#include "GrTypes.h"
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#include "GrPoint.h"
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class GrPlotMgr : GrNoncopyable {
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public:
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GrPlotMgr(int width, int height) {
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fDim.set(width, height);
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size_t needed = width * height;
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if (needed <= sizeof(fStorage)) {
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fBusy = fStorage;
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} else {
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fBusy = new char[needed];
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}
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this->reset();
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}
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~GrPlotMgr() {
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if (fBusy != fStorage) {
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delete[] fBusy;
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}
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}
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void reset() {
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Gr_bzero(fBusy, fDim.fX * fDim.fY);
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}
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bool newPlot(GrIPoint16* loc) {
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char* busy = fBusy;
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for (int y = 0; y < fDim.fY; y++) {
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for (int x = 0; x < fDim.fX; x++) {
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if (!*busy) {
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*busy = true;
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loc->set(x, y);
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return true;
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}
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busy++;
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}
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}
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return false;
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}
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bool isBusy(int x, int y) const {
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GrAssert((unsigned)x < (unsigned)fDim.fX);
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GrAssert((unsigned)y < (unsigned)fDim.fY);
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return fBusy[y * fDim.fX + x] != 0;
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}
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void freePlot(int x, int y) {
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GrAssert((unsigned)x < (unsigned)fDim.fX);
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GrAssert((unsigned)y < (unsigned)fDim.fY);
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fBusy[y * fDim.fX + x] = false;
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}
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private:
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enum {
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STORAGE = 64
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};
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char fStorage[STORAGE];
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char* fBusy;
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GrIPoint16 fDim;
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};
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#endif
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