333 lines
8.4 KiB
C++
333 lines
8.4 KiB
C++
/***************************************************************************
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zbmp.cpp: Z-buffer bitmap class
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Primary Author: ******
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Review Status: REVIEWED - any changes to this file must be reviewed!
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***************************************************************************/
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#include "bren.h"
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ASSERTNAME
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RTCLASS(ZBMP)
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/***************************************************************************
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Create a ZBMP of all 0xff's
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***************************************************************************/
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PZBMP ZBMP::PzbmpNew(long dxp, long dyp)
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{
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AssertIn(dxp, 1, klwMax);
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AssertIn(dyp, 1, klwMax);
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PZBMP pzbmp;
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pzbmp = NewObj ZBMP;
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if (pvNil == pzbmp)
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goto LFail;
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pzbmp->_rc.Set(0, 0, dxp, dyp);
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pzbmp->_cbRow = LwMul(dxp, kcbPixelZbmp);
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pzbmp->_cb = LwMul(dyp, pzbmp->_cbRow);
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if (!FAllocPv((void **)&pzbmp->_prgb, pzbmp->_cb, fmemNil, mprNormal))
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goto LFail;
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FillPb(pzbmp->_prgb, pzbmp->_cb, 0xff);
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AssertPo(pzbmp, 0);
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return pzbmp;
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LFail:
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ReleasePpo(&pzbmp);
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return pvNil;
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}
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/***************************************************************************
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Create a ZBMP from a BPMP. For authoring use only.
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***************************************************************************/
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PZBMP ZBMP::PzbmpNewFromBpmp(BPMP *pbpmp)
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{
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AssertVarMem(pbpmp);
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PZBMP pzbmp;
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pzbmp = PzbmpNew(pbpmp->width, pbpmp->height);
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if (pvNil == pzbmp)
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return pvNil;
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CopyPb(pbpmp->pixels, pzbmp->_prgb, pzbmp->_cb);
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return pzbmp;
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}
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/***************************************************************************
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Chunky resource reader for ZBMP
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***************************************************************************/
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bool ZBMP::FReadZbmp(PCRF pcrf, CTG ctg, CNO cno, PBLCK pblck,
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PBACO *ppbaco, long *pcb)
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{
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AssertPo(pcrf, 0);
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AssertPo(pblck, 0);
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AssertNilOrVarMem(ppbaco);
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AssertVarMem(pcb);
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ZBMP *pzbmp;
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*pcb = pblck->Cb(fTrue); // estimate ZBMP size
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if (pvNil == ppbaco)
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return fTrue;
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if (!pblck->FUnpackData())
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goto LFail;
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*pcb = pblck->Cb();
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pzbmp = PzbmpRead(pblck);
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if (pvNil == pzbmp)
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{
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LFail:
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TrashVar(ppbaco);
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TrashVar(pcb);
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return fFalse;
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}
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AssertPo(pzbmp, 0);
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*ppbaco = pzbmp;
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*pcb = size(ZBMP) + pzbmp->_cb;
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return fTrue;
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}
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/***************************************************************************
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Read a ZBMP from a BLCK.
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***************************************************************************/
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PZBMP ZBMP::PzbmpRead(PBLCK pblck)
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{
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AssertPo(pblck, 0);
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PZBMP pzbmp;
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ZBMPF zbmpf;
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if (!pblck->FUnpackData())
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return pvNil;
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pzbmp = NewObj ZBMP;
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if (pvNil == pzbmp)
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goto LFail;
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if (!pblck->FReadRgb(&zbmpf, size(ZBMPF), 0))
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goto LFail;
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pzbmp->_rc.Set(zbmpf.xpLeft, zbmpf.ypTop, zbmpf.xpLeft + zbmpf.dxp,
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zbmpf.ypTop + zbmpf.dyp);
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pzbmp->_cbRow = LwMul(pzbmp->_rc.Dxp(), kcbPixelZbmp);
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pzbmp->_cb = LwMul(pzbmp->_rc.Dyp(), pzbmp->_cbRow);
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if (pblck->Cb() != size(ZBMPF) + pzbmp->_cb)
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goto LFail;
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if (!FAllocPv((void **)&pzbmp->_prgb, pzbmp->_cb, fmemNil, mprNormal))
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goto LFail;
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if (!pblck->FReadRgb(pzbmp->_prgb, pzbmp->_cb, size(ZBMPF)))
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goto LFail;
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AssertPo(pzbmp, 0);
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return pzbmp;
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LFail:
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Warn("Couldn't load ZBMP");
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ReleasePpo(&pzbmp);
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return pvNil;
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}
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/***************************************************************************
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Destructor
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***************************************************************************/
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ZBMP::~ZBMP(void)
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{
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AssertBaseThis(0);
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FreePpv((void **)&_prgb);
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}
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/***************************************************************************
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Draw the ZBMP into prgbPixels
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***************************************************************************/
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void ZBMP::Draw(byte *prgbPixels, long cbRow, long dyp, long xpRef,
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long ypRef, RC *prcClip, PREGN pregnClip)
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{
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AssertThis(0);
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AssertPvCb(prgbPixels, LwMul(cbRow, dyp));
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AssertNilOrVarMem(prcClip);
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AssertNilOrVarMem(pregnClip);
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long yp;
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long cbRowCopy;
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byte *pbSrc;
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byte *pbDst;
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REGSC regsc;
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RC rcZbmp = _rc;
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RC rcRegnBounds;
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RC rcClippedRegnBounds;
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long xpLeft, xpRight;
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// Translate the zbmp's rc into coordinate system of prgbPixels' rc
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rcZbmp.Offset(xpRef, ypRef);
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if (pvNil == pregnClip)
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{
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if (pvNil == prcClip)
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return;
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if (!rcClippedRegnBounds.FIntersect(&rcZbmp, prcClip))
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return;
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regsc.InitRc(prcClip, &rcClippedRegnBounds);
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}
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else
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{
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if (pregnClip->FEmpty(&rcRegnBounds))
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return;
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if (!rcClippedRegnBounds.FIntersect(&rcZbmp, &rcRegnBounds))
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return;
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if (pvNil != prcClip && !rcClippedRegnBounds.FIntersect(prcClip))
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return;
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regsc.Init(pregnClip, &rcClippedRegnBounds);
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}
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for (yp = rcClippedRegnBounds.ypTop; yp < rcClippedRegnBounds.ypBottom;
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yp++)
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{
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while (regsc.XpCur() < klwMax)
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{
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xpLeft = regsc.XpCur() + rcClippedRegnBounds.xpLeft;
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xpRight = regsc.XpFetch() + rcClippedRegnBounds.xpLeft;
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AssertIn(xpLeft, rcClippedRegnBounds.xpLeft,
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rcClippedRegnBounds.xpRight + 1);
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AssertIn(xpRight, rcClippedRegnBounds.xpLeft,
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rcClippedRegnBounds.xpRight + 1);
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regsc.XpFetch();
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cbRowCopy = LwMul(kcbPixelZbmp, xpRight - xpLeft);
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pbSrc = _prgb + LwMul(yp, _cbRow) + LwMul(kcbPixelZbmp, xpLeft);
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pbDst = prgbPixels + LwMul(yp, cbRow) + LwMul(kcbPixelZbmp,
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xpLeft);
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CopyPb(pbSrc, pbDst, cbRowCopy);
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}
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regsc.ScanNext(1);
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}
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}
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/***************************************************************************
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Draw the ZBMP into prgbPixels, squashing the clip region vertically by
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two (for BWLD's "half mode")
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***************************************************************************/
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void ZBMP::DrawHalf(byte *prgbPixels, long cbRow, long dyp, long xpRef,
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long ypRef, RC *prcClip, PREGN pregnClip)
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{
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AssertThis(0);
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AssertPvCb(prgbPixels, LwMul(cbRow, dyp / 2));
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AssertNilOrVarMem(prcClip);
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AssertNilOrVarMem(pregnClip);
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long yp;
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long cbRowCopy;
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byte *pbSrc;
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byte *pbDst;
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REGSC regsc;
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RC rcZbmp = _rc;
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RC rcRegnBounds;
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RC rcClippedRegnBounds;
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long xpLeft, xpRight;
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rcZbmp.ypBottom *= 2;
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// Translate the zbmp's rc into coordinate system of prgbPixels' rc
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rcZbmp.Offset(xpRef, ypRef);
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if (pvNil == pregnClip)
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{
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if (pvNil == prcClip)
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return;
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if (!rcClippedRegnBounds.FIntersect(&rcZbmp, prcClip))
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return;
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regsc.InitRc(prcClip, &rcClippedRegnBounds);
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}
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else
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{
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if (pregnClip->FEmpty(&rcRegnBounds))
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return;
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if (!rcClippedRegnBounds.FIntersect(&rcZbmp, &rcRegnBounds))
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return;
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if (pvNil != prcClip && !rcClippedRegnBounds.FIntersect(prcClip))
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return;
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regsc.Init(pregnClip, &rcClippedRegnBounds);
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}
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for (yp = rcClippedRegnBounds.ypTop; yp < rcClippedRegnBounds.ypBottom;
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yp += 2)
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{
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while (regsc.XpCur() < klwMax)
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{
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xpLeft = regsc.XpCur() + rcClippedRegnBounds.xpLeft;
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xpRight = regsc.XpFetch() + rcClippedRegnBounds.xpLeft;
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AssertIn(xpLeft, rcClippedRegnBounds.xpLeft,
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rcClippedRegnBounds.xpRight + 1);
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AssertIn(xpRight, rcClippedRegnBounds.xpLeft,
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rcClippedRegnBounds.xpRight + 1);
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regsc.XpFetch();
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cbRowCopy = LwMul(kcbPixelZbmp, xpRight - xpLeft);
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pbSrc = _prgb + LwMul(yp/2, _cbRow) + LwMul(kcbPixelZbmp, xpLeft);
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pbDst = prgbPixels + LwMul(yp/2, cbRow) + LwMul(kcbPixelZbmp,
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xpLeft);
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CopyPb(pbSrc, pbDst, cbRowCopy);
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}
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regsc.ScanNext(2);
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}
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}
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/***************************************************************************
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Write the ZBMP
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***************************************************************************/
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bool ZBMP::FWrite(PCFL pcfl, CTG ctg, CNO *pcno)
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{
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AssertThis(0);
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AssertPo(pcfl, 0);
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AssertVarMem(pcno);
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ZBMPF zbmpf;
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BLCK blck;
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zbmpf.bo = kboCur;
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zbmpf.osk = koskCur;
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zbmpf.xpLeft = (short)_rc.xpLeft;
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zbmpf.ypTop = (short)_rc.ypTop;
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zbmpf.dxp = (short)_rc.Dxp();
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zbmpf.dyp = (short)_rc.Dyp();
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if (!pcfl->FAdd(size(ZBMPF) + _cb, ctg, pcno, &blck))
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return fFalse;
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if (!blck.FWriteRgb(&zbmpf, size(ZBMPF), 0))
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return fFalse;
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if (!blck.FWriteRgb(_prgb, _cb, size(ZBMPF)))
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return fFalse;
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return fTrue;
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}
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#ifdef DEBUG
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/***************************************************************************
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Assert the validity of the ZBMP.
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***************************************************************************/
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void ZBMP::AssertValid(ulong grf)
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{
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ZBMP_PAR::AssertValid(fobjAllocated);
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AssertPvCb(_prgb, _cb);
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Assert(_cbRow == LwMul(_rc.Dxp(), kcbPixelZbmp), "bad _cbRow");
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Assert(_cb == LwMul(_rc.Dyp(), _cbRow), "bad _cb");
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}
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/***************************************************************************
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Mark memory used by the ZBMP
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***************************************************************************/
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void ZBMP::MarkMem(void)
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{
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AssertThis(0);
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ZBMP_PAR::MarkMem();
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MarkPv(_prgb);
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}
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#endif //DEBUG
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