📄 libmng_filter.c
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}
iS -= 4;
iQ = (mng_uint8)(((iB >> iS) + pData->iLevel0) & 0x0F);
iN = (mng_uint8)((iN << 4) + iQ);
iC--;
if (!iC)
*pRawo++ = iN;
}
if (iC)
*pRawo = (mng_uint8)(iN << iS);
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_G4, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_g8 (mng_datap pData)
{
mng_uint8p pRawi, pRawo;
mng_int32 iX;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_G8, MNG_LC_START)
#endif
pRawi = pData->pWorkrow + pData->iPixelofs;
pRawo = pData->pPrevrow + pData->iPixelofs;
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsamples - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsamples; iX++)
#endif
{
*pRawo++ = (mng_uint8)(((mng_uint16)*pRawi + pData->iLevel0) & 0xFF);
pRawi++;
}
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_G8, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_g16 (mng_datap pData)
{
mng_uint16p pRawi, pRawo;
mng_int32 iX;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_G16, MNG_LC_START)
#endif
pRawi = (mng_uint16p)(pData->pWorkrow + pData->iPixelofs);
pRawo = (mng_uint16p)(pData->pPrevrow + pData->iPixelofs);
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsamples - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsamples; iX++)
#endif
{
*pRawo++ = (mng_uint16)(((mng_uint32)*pRawi + (mng_uint32)pData->iLevel0) & 0xFFFF);
pRawi++;
}
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_G16, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_rgb8 (mng_datap pData)
{
mng_uint8p pRawi, pRawo;
mng_int32 iX;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_RGB8, MNG_LC_START)
#endif
pRawi = pData->pWorkrow + pData->iPixelofs;
pRawo = pData->pPrevrow + pData->iPixelofs;
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsamples - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsamples; iX++)
#endif
{
*(pRawo+1) = (mng_uint8)(((mng_uint16)*(pRawi+1) + pData->iLevel1) & 0xFF);
*pRawo = (mng_uint8)(((mng_uint16)*pRawi + pData->iLevel0 +
(mng_uint16)*(pRawo+1)) & 0xFF);
*(pRawo+2) = (mng_uint8)(((mng_uint16)*(pRawi+2) + pData->iLevel2 +
(mng_uint16)*(pRawo+1)) & 0xFF);
pRawi += 3;
pRawo += 3;
}
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_RGB8, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_rgb16 (mng_datap pData)
{
mng_uint16p pRawi, pRawo;
mng_int32 iX;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_RGB16, MNG_LC_START)
#endif
pRawi = (mng_uint16p)(pData->pWorkrow + pData->iPixelofs);
pRawo = (mng_uint16p)(pData->pPrevrow + pData->iPixelofs);
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsamples - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsamples; iX++)
#endif
{
*(pRawo+1) = (mng_uint16)(((mng_uint32)*(pRawi+1) + (mng_uint32)pData->iLevel1) & 0xFFFF);
*pRawo = (mng_uint16)(((mng_uint32)*pRawi + (mng_uint32)pData->iLevel0 +
(mng_uint32)*(pRawo+1)) & 0xFFFF);
*(pRawo+2) = (mng_uint16)(((mng_uint32)*(pRawi+2) + (mng_uint32)pData->iLevel2 +
(mng_uint32)*(pRawo+1)) & 0xFFFF);
pRawi += 3;
pRawo += 3;
}
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_RGB16, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_idx1 (mng_datap pData)
{
mng_uint8p pRawi, pRawo;
mng_int32 iX;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_IDX1, MNG_LC_START)
#endif
if (pData->iLevel0 & 0x01) /* is it uneven level ? */
{
pRawi = pData->pWorkrow + pData->iPixelofs;
pRawo = pData->pPrevrow + pData->iPixelofs;
/* just invert every bit */
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsize - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsize; iX++)
#endif
*pRawo++ = (mng_uint8)(~(*pRawi++));
}
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_IDX1, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_idx2 (mng_datap pData)
{
mng_uint8p pRawi, pRawo;
mng_int32 iX;
mng_int32 iC, iS;
mng_uint8 iB, iN, iQ;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_IDX2, MNG_LC_START)
#endif
pRawi = pData->pWorkrow + pData->iPixelofs;
pRawo = pData->pPrevrow + pData->iPixelofs;
iC = 0;
iB = 0;
iN = 0;
iS = 0;
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsamples - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsamples; iX++)
#endif
{
if (!iC)
{
iC = 4;
iB = *pRawi++;
iN = 0;
iS = 8;
}
iS -= 2;
iQ = (mng_uint8)(((iB >> iS) + pData->iLevel0) & 0x03);
iN = (mng_uint8)((iN << 2) + iQ);
iC--;
if (!iC)
*pRawo++ = iN;
}
if (iC)
*pRawo = (mng_uint8)(iN << iS);
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_IDX2, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_idx4 (mng_datap pData)
{
mng_uint8p pRawi, pRawo;
mng_int32 iX;
mng_int32 iC, iS;
mng_uint8 iB, iN, iQ;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_IDX4, MNG_LC_START)
#endif
pRawi = pData->pWorkrow + pData->iPixelofs;
pRawo = pData->pPrevrow + pData->iPixelofs;
iC = 0;
iB = 0;
iN = 0;
iS = 0;
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsamples - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsamples; iX++)
#endif
{
if (!iC)
{
iC = 2;
iB = *pRawi++;
iN = 0;
iS = 8;
}
iS -= 4;
iQ = (mng_uint8)(((iB >> iS) + pData->iLevel0) & 0x0F);
iN = (mng_uint8)((iN << 4) + iQ);
iC--;
if (!iC)
*pRawo++ = iN;
}
if (iC)
*pRawo = (mng_uint8)(iN << iS);
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_IDX4, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_idx8 (mng_datap pData)
{
mng_uint8p pRawi, pRawo;
mng_int32 iX;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_IDX8, MNG_LC_START)
#endif
pRawi = pData->pWorkrow + pData->iPixelofs;
pRawo = pData->pPrevrow + pData->iPixelofs;
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsamples - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsamples; iX++)
#endif
{
*pRawo++ = (mng_uint8)(((mng_uint16)*pRawi + pData->iLevel0) & 0xFF);
pRawi++;
}
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_IDX8, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_ga8 (mng_datap pData)
{
mng_uint8p pRawi, pRawo;
mng_int32 iX;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_GA8, MNG_LC_START)
#endif
pRawi = pData->pWorkrow + pData->iPixelofs;
pRawo = pData->pPrevrow + pData->iPixelofs;
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsamples - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsamples; iX++)
#endif
{
*pRawo = (mng_uint8)(((mng_uint16)*pRawi + pData->iLevel0) & 0xFF);
*(pRawo+1) = (mng_uint8)(((mng_uint16)*(pRawi+1) + pData->iLevel1) & 0xFF);
pRawi += 2;
pRawo += 2;
}
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_GA8, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_ga16 (mng_datap pData)
{
mng_uint16p pRawi, pRawo;
mng_int32 iX;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_GA16, MNG_LC_START)
#endif
pRawi = (mng_uint16p)(pData->pWorkrow + pData->iPixelofs);
pRawo = (mng_uint16p)(pData->pPrevrow + pData->iPixelofs);
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsamples - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsamples; iX++)
#endif
{
*pRawo = (mng_uint16)(((mng_uint32)*pRawi + (mng_uint32)pData->iLevel0) & 0xFFFF);
*(pRawo+1) = (mng_uint16)(((mng_uint32)*(pRawi+1) + (mng_uint32)pData->iLevel1) & 0xFFFF);
pRawi += 2;
}
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_GA16, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_rgba8 (mng_datap pData)
{
mng_uint8p pRawi, pRawo;
mng_int32 iX;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_RGBA8, MNG_LC_START)
#endif
pRawi = pData->pWorkrow + pData->iPixelofs;
pRawo = pData->pPrevrow + pData->iPixelofs;
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsamples - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsamples; iX++)
#endif
{
*(pRawo+1) = (mng_uint8)(((mng_uint16)*(pRawi+1) + pData->iLevel1) & 0xFF);
*pRawo = (mng_uint8)(((mng_uint16)*pRawi + pData->iLevel0 +
(mng_uint16)*(pRawo+1)) & 0xFF);
*(pRawo+2) = (mng_uint8)(((mng_uint16)*(pRawi+2) + pData->iLevel2 +
(mng_uint16)*(pRawo+1)) & 0xFF);
*(pRawo+3) = (mng_uint8)(((mng_uint16)*(pRawi+3) + pData->iLevel3) & 0xFF);
pRawi += 4;
pRawo += 4;
}
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_RGBA8, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
mng_retcode mng_differ_rgba16 (mng_datap pData)
{
mng_uint16p pRawi, pRawo;
mng_int32 iX;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_RGBA16, MNG_LC_START)
#endif
pRawi = (mng_uint16p)(pData->pWorkrow + pData->iPixelofs);
pRawo = (mng_uint16p)(pData->pPrevrow + pData->iPixelofs);
#ifdef MNG_DECREMENT_LOOPS
for (iX = pData->iRowsamples - 1; iX >= 0; iX--)
#else
for (iX = 0; iX < pData->iRowsamples; iX++)
#endif
{
*(pRawo+1) = (mng_uint16)(((mng_uint32)*(pRawi+1) + (mng_uint32)pData->iLevel1) & 0xFFFF);
*pRawo = (mng_uint16)(((mng_uint32)*pRawi + (mng_uint32)pData->iLevel0 +
(mng_uint32)*(pRawo+1)) & 0xFFFF);
*(pRawo+2) = (mng_uint16)(((mng_uint32)*(pRawi+2) + (mng_uint32)pData->iLevel2 +
(mng_uint32)*(pRawo+1)) & 0xFFFF);
*(pRawo+3) = (mng_uint16)(((mng_uint32)*(pRawi+3) + (mng_uint32)pData->iLevel3) & 0xFFFF);
pRawi += 4;
pRawo += 4;
}
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (pData, MNG_FN_DIFFER_RGBA16, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
#endif /* FILTER192 */
/* ************************************************************************** */
#endif /* MNG_INCLUDE_FILTERS */
/* ************************************************************************** */
/* * end of file * */
/* ************************************************************************** */
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