Function GetCompChanLen

DevIL/src-IL/src/il_psd.cpp:528–561

ILuint *GetCompChanLen(PSDHEAD *Head)
{
	ILushort	*RleTable;
	ILuint		*ChanLen, c, i, j;

	RleTable = (ILushort*)ialloc(Head->Height * ChannelNum * sizeof(ILushort));
	ChanLen = (ILuint*)ialloc(ChannelNum * sizeof(ILuint));
	if (RleTable == NULL || ChanLen == NULL) {
		return NULL;
	}

	if (iread(RleTable, sizeof(ILushort), Head->Height * ChannelNum) != Head->Height * ChannelNum) {
		ifree(RleTable);
		ifree(ChanLen);
		return NULL;
	}
#ifdef __LITTLE_ENDIAN__
	for (i = 0; i < Head->Height * ChannelNum; i++) {
		iSwapUShort(&RleTable[i]);
	}
#endif

	imemclear(ChanLen, ChannelNum * sizeof(ILuint));
	for (c = 0; c < ChannelNum; c++) {
		j = c * Head->Height;
		for (i = 0; i < Head->Height; i++) {
			ChanLen[c] += RleTable[i + j];
		}
	}

	ifree(RleTable);

	return ChanLen;
}