Microsoft-3D-Movie-Maker/kauai/SRC/PIC.CPP

/* Copyright (c) Microsoft Corporation.
   Licensed under the MIT License. */

/***************************************************************************
	Author: ShonK
	Project: Kauai
	Reviewed:
	Copyright (c) Microsoft Corporation

	Common OS-independent picture routines.

***************************************************************************/
#include "frame.h"
ASSERTNAME


RTCLASS(PIC)


/***************************************************************************
	Static method to create a new PIC based on the given HPIC with
	bounding rectangle *prc. If this fails, it is the callers responsibility
	to free the hpic. If it succeeds, the ppic returned owns the hpic.
***************************************************************************/
PPIC PIC::PpicNew(HPIC hpic, RC *prc)
{
	Assert(hpic != hNil, "nil hpic");
	AssertVarMem(prc);
	PPIC ppic;

	if (pvNil == (ppic = NewObj PIC))
		return pvNil;

	ppic->_hpic = hpic;
	ppic->_rc = *prc;
	AssertPo(ppic, 0);
	return ppic;
}


/***************************************************************************
	Get the natural rectangle for the picture.
***************************************************************************/
void PIC::GetRc(RC *prc)
{
	AssertThis(0);
	*prc = _rc;
}


/***************************************************************************
	Add the picture to the chunky file. The OS specific representation
	will be a child of the chunk and have the given chid value.
***************************************************************************/
bool PIC::FAddToCfl(PCFL pcfl, CTG ctg, CNO *pcno, CHID chid)
{
	AssertThis(0);
	AssertPo(pcfl, 0);
	AssertVarMem(pcno);
	BLCK blck;
	CNO cnoKid;
	long cb;

	if (!pcfl->FAdd(0, ctg, pcno))
		return fFalse;
	cb = CbOnFile();
	if (!pcfl->FAddChild(ctg, *pcno, chid, cb, kctgPictNative, &cnoKid, &blck) ||
			!FWrite(&blck))
		{
		pcfl->Delete(ctg, *pcno);
		TrashVar(pcno);
		return fFalse;
		}
	return fTrue;
}


/***************************************************************************
	Put the picture as the given ctg and cno in the chunky file. The
	OS specific representation will be a child of the chunk and have the
	given chid value.
***************************************************************************/
bool PIC::FPutInCfl(PCFL pcfl, CTG ctg, CNO cno, CHID chid)
{
	AssertThis(0);
	AssertPo(pcfl, 0);
	bool fDelOnFail;
	long ikid;
	KID kid;
	BLCK blck;
	CNO cnoKid;
	long cb;

	fDelOnFail = !pcfl->FFind(ctg, cno);
	if (!pcfl->FPut(0, ctg, cno))
		goto LFail;
	cb = CbOnFile();
	if (!pcfl->FAddChild(ctg, cno, chid, cb, kctgPictNative, &cnoKid, &blck))
		goto LFail;
	if (!FWrite(&blck))
		{
		if (!fDelOnFail)
			pcfl->DeleteChild(ctg, cno, kctgPictNative, cnoKid, chid);
LFail:
		if (fDelOnFail)
			pcfl->Delete(ctg, cno);
		return fFalse;
		}

	//delete all other reps with the same ctg and chid
	for (ikid = pcfl->Ckid(ctg, cno); ikid-- > 0; )
		{
		AssertDo(pcfl->FGetKid(ctg, cno, ikid, &kid), 0);
		if (kid.cki.ctg == kctgPictNative && kid.chid == chid && kid.cki.cno != cnoKid)
			pcfl->DeleteChild(ctg, cno, kid.cki.ctg, kid.cki.cno, kid.chid);
		}
	return fTrue;
}


#ifdef DEBUG
/***************************************************************************
	Assert the validity of a PIC.
***************************************************************************/
void PIC::AssertValid(ulong grf)
{
	PIC_PAR::AssertValid(0);
	Assert(_hpic != hNil, "bad hpic");
}
#endif //DEBUG


/***************************************************************************
	A PFNRPO to read PIC 0 from a GRAF chunk.
***************************************************************************/
bool FReadMainPic(PCFL pcfl, CTG ctg, CNO cno, PBLCK pblck,
	PBACO *ppbaco, long *pcb)
{
	PPIC ppic;

	if (pvNil == ppbaco)
		{
		//REVIEW shonk: get a better estimate of the real size -
		*pcb = 1;
		return fTrue;
		}

	if (pvNil == (ppic = PIC::PpicFetch(pcfl, ctg, cno)))
		{
		TrashVar(pcb);
		TrashVar(ppbaco);
		return fFalse;
		}

	*pcb = ppic->CbOnFile();
	*ppbaco = ppic;
	return fTrue;
}