/* libhpojip -- HP OfficeJet image-processing library. */ /* Copyright (C) 1995-2002 HP Company * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * is provided AS IS, WITHOUT ANY WARRANTY; without even the implied * warranty of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, and * NON-INFRINGEMENT. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, * MA 02111-1307, USA. * * In addition, as a special exception, HP Company * gives permission to link the code of this program with any * version of the OpenSSL library which is distributed under a * license identical to that listed in the included LICENSE.OpenSSL * file, and distribute linked combinations including the two. * You must obey the GNU General Public License in all respects * for all of the code used other than OpenSSL. If you modify * this file, you may extend this exception to your version of the * file, but you are not obligated to do so. If you do not wish to * do so, delete this exception statement from your version. */ /* Original author: Mark Overton and others. * * Ported to Linux by David Paschal. */ /******************************************************************************\ * * xsaturation.c - Changes the saturation of color data * ****************************************************************************** * * Name of Global Jump-Table: * * saturationTbl * * Items in aXformInfo array passed into setXformSpec: * * aXformInfo[IP_SATURATION_FACTOR] = saturation factor, in 24.8 fixed point (8 bits of frac) * * A conceptual value of 1.0 (aXformInfo[0] = 256) means no change in * saturation. 2.0 doubles it; 0.5 cuts it in half. 0.0 eliminates all * color, outputting RGB grayscale. * * Capabilities and Limitations: * * The incoming data can be 24-bit color or 48-bit color. * The pixels are assumed to be RGB. * * Default Input Traits, and Output Traits: * * trait default input output * ------------------- --------------------- ------------------------ * iPixelsPerRow * passed into output same as default input * iBitsPerPixel * passed into output same as default input * iComponentsPerPixel passed into output same as default input * lHorizDPI passed into output same as default input * lVertDPI passed into output same as default input * lNumRows passed into output same as default input * iNumPages passed into output same as default input * iPageNum passed into output same as default input * * Above, a "*" by an item indicates it must be valid (not negative). * * Feb 2000 Mark Overton -- wrote original code * \******************************************************************************/ #include "hpip.h" #include "ipdefs.h" #include "string.h" /* for memset and memcpy */ #if 0 #include "stdio.h" #include #define PRINT(msg,arg1,arg2) \ _ftprintf(stderr, msg, (int)arg1, (int)arg2) #else #define PRINT(msg,arg1,arg2) #endif #define CHECK_VALUE 0x4ba1dace typedef struct { IP_IMAGE_TRAITS traits; /* traits of the input and output image */ DWORD dwSatFac; /* desired saturation factor */ DWORD dwBytesPerRow; /* # of bytes in each row */ DWORD dwRowsDone; /* number of rows converted so far */ DWORD dwInNextPos; /* file pos for subsequent input */ DWORD dwOutNextPos; /* file pos for subsequent output */ DWORD dwValidChk; /* struct validity check value */ } SAT_INST, *PSAT_INST; /*****************************************************************************\ * * saturation_openXform - Creates a new instance of the transformer * ***************************************************************************** * * This returns a handle for the new instance to be passed into * all subsequent calls. * * Return value: IP_DONE=success; IP_FATAL_ERROR=misc error. * \*****************************************************************************/ static WORD saturation_openXform ( IP_XFORM_HANDLE *pXform) /* out: returned handle */ { PSAT_INST g; INSURE (pXform != NULL); IP_MEM_ALLOC (sizeof(SAT_INST), g); *pXform = g; memset (g, 0, sizeof(SAT_INST)); g->dwValidChk = CHECK_VALUE; return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * saturation_setDefaultInputTraits - Specifies default input image traits * ***************************************************************************** * * The header of the file-type handled by the transform probably does * not include *all* the image traits we'd like to know. Those not * specified in the file-header are filled in from info provided by * this routine. * * Return value: IP_DONE=success; IP_FATAL_ERROR=misc error. * \*****************************************************************************/ static WORD saturation_setDefaultInputTraits ( IP_XFORM_HANDLE hXform, /* in: handle for xform */ PIP_IMAGE_TRAITS pTraits) /* in: default image traits */ { PSAT_INST g; HANDLE_TO_PTR (hXform, g); /* insure that traits we care about are known */ INSURE (pTraits->iPixelsPerRow>0 && (pTraits->iBitsPerPixel==24 || pTraits->iBitsPerPixel==48)); g->traits = *pTraits; /* a structure copy */ g->dwBytesPerRow = (g->traits.iPixelsPerRow*g->traits.iBitsPerPixel + 7) / 8; return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * saturation_setXformSpec - Provides xform-specific information * \*****************************************************************************/ static WORD saturation_setXformSpec ( IP_XFORM_HANDLE hXform, /* in: handle for xform */ DWORD_OR_PVOID aXformInfo[]) /* in: xform information */ { PSAT_INST g; HANDLE_TO_PTR (hXform, g); g->dwSatFac = aXformInfo[IP_SATURATION_FACTOR].dword; return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * saturation_getHeaderBufSize- Returns size of input buf needed to hold header * \*****************************************************************************/ static WORD saturation_getHeaderBufSize ( IP_XFORM_HANDLE hXform, /* in: handle for xform */ DWORD *pdwInBufLen) /* out: buf size for parsing header */ { /* since input is raw pixels, there is no header, so set it to zero */ *pdwInBufLen = 0; return IP_DONE; } /*****************************************************************************\ * * saturation_getActualTraits - Parses header, and returns input & output traits * \*****************************************************************************/ static WORD saturation_getActualTraits ( IP_XFORM_HANDLE hXform, /* in: handle for xform */ DWORD dwInputAvail, /* in: # avail bytes in input buf */ PBYTE pbInputBuf, /* in: ptr to input buffer */ PDWORD pdwInputUsed, /* out: # bytes used from input buf */ PDWORD pdwInputNextPos,/* out: file-pos to read from next */ PIP_IMAGE_TRAITS pIntraits, /* out: input image traits */ PIP_IMAGE_TRAITS pOutTraits) /* out: output image traits */ { PSAT_INST g; HANDLE_TO_PTR (hXform, g); /* Since there is no header, we'll report no usage of input */ *pdwInputUsed = 0; *pdwInputNextPos = 0; *pIntraits = g->traits; /* structure copies */ *pOutTraits = g->traits; return IP_DONE | IP_READY_FOR_DATA; fatal_error: return IP_FATAL_ERROR; } /****************************************************************************\ * * saturation_getActualBufSizes - Returns buf sizes needed for remainder of job * \****************************************************************************/ static WORD saturation_getActualBufSizes ( IP_XFORM_HANDLE hXform, /* in: handle for xform */ PDWORD pdwMinInBufLen, /* out: min input buf size */ PDWORD pdwMinOutBufLen) /* out: min output buf size */ { PSAT_INST g; HANDLE_TO_PTR (hXform, g); *pdwMinInBufLen = *pdwMinOutBufLen = g->dwBytesPerRow; return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * saturation_convert - Converts one row * \*****************************************************************************/ static WORD saturation_convert ( IP_XFORM_HANDLE hXform, DWORD dwInputAvail, /* in: # avail bytes in in-buf */ PBYTE pbInputBuf, /* in: ptr to in-buffer */ PDWORD pdwInputUsed, /* out: # bytes used from in-buf */ PDWORD pdwInputNextPos, /* out: file-pos to read from next */ DWORD dwOutputAvail, /* in: # avail bytes in out-buf */ PBYTE pbOutputBuf, /* in: ptr to out-buffer */ PDWORD pdwOutputUsed, /* out: # bytes written in out-buf */ PDWORD pdwOutputThisPos) /* out: file-pos to write the data */ { PSAT_INST g; int nBytes; PBYTE pIn, pOut, pOutAfter; int l, rv, gv, bv; HANDLE_TO_PTR (hXform, g); /**** Check if we were told to flush ****/ if (pbInputBuf == NULL) { PRINT (_T("saturation_convert: Told to flush.\n"), 0, 0); *pdwInputUsed = *pdwOutputUsed = 0; *pdwInputNextPos = g->dwInNextPos; *pdwOutputThisPos = g->dwOutNextPos; return IP_DONE; } /**** Output a Row ****/ nBytes = g->dwBytesPerRow; INSURE (dwInputAvail >= (DWORD)nBytes ); INSURE (dwOutputAvail >= (DWORD)nBytes); pIn = pbInputBuf; pOut = pbOutputBuf; pOutAfter = pOut + nBytes; if (g->traits.iBitsPerPixel == 24) { /* 24-bit color in RGB */ while (pOut < pOutAfter) { rv = *pIn++; gv = *pIn++; bv = *pIn++; l = NTSC_LUMINANCE (rv,gv,bv); rv = l + (((rv-l)*(int)g->dwSatFac + (1<<7)) >> 8); gv = l + (((gv-l)*(int)g->dwSatFac + (1<<7)) >> 8); bv = l + (((bv-l)*(int)g->dwSatFac + (1<<7)) >> 8); if (rv > 255) rv = 255; else if (rv < 0) rv = 0; if (gv > 255) gv = 255; else if (gv < 0) gv = 0; if (bv > 255) bv = 255; else if (bv < 0) bv = 0; *pOut++ = (BYTE)rv; *pOut++ = (BYTE)gv; *pOut++ = (BYTE)bv; } } else { /* 48 bits/pixel */ PWORD src = (PWORD)pIn; PWORD dst = (PWORD)pOut; PWORD dstAfter = (PWORD)pOutAfter; while (dst < dstAfter) { rv = (unsigned)(*src++); gv = (unsigned)(*src++); bv = (unsigned)(*src++); l = NTSC_LUMINANCE (rv,gv,bv); rv = l + (((rv-l)*(int)g->dwSatFac + (1<<7)) >> 8); gv = l + (((gv-l)*(int)g->dwSatFac + (1<<7)) >> 8); bv = l + (((bv-l)*(int)g->dwSatFac + (1<<7)) >> 8); if (rv > 65535) rv = 65535; else if (rv < 0) rv = 0; if (gv > 65535) gv = 65535; else if (gv < 0) gv = 0; if (bv > 65535) bv = 65535; else if (bv < 0) bv = 0; *dst++ = (WORD)rv; *dst++ = (WORD)gv; *dst++ = (WORD)bv; } } *pdwInputUsed = nBytes; g->dwInNextPos += nBytes; *pdwInputNextPos = g->dwInNextPos; *pdwOutputUsed = nBytes; *pdwOutputThisPos = g->dwOutNextPos; g->dwOutNextPos += nBytes; g->dwRowsDone += 1; return IP_CONSUMED_ROW | IP_PRODUCED_ROW | IP_READY_FOR_DATA; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * saturation_insertedData - client inserted into our output stream * \*****************************************************************************/ static WORD saturation_insertedData ( IP_XFORM_HANDLE hXform, DWORD dwNumBytes) { fatalBreakPoint (); return IP_FATAL_ERROR; /* must never be called (can't insert data) */ } /*****************************************************************************\ * * saturation_newPage - Tells us to flush this page, and start a new page * \*****************************************************************************/ static WORD saturation_newPage ( IP_XFORM_HANDLE hXform) { PSAT_INST g; HANDLE_TO_PTR (hXform, g); /* todo: return fatal error if convert is called again? */ return IP_DONE; /* can't insert page-breaks, so ignore this call */ fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * saturation_closeXform - Destroys this instance * \*****************************************************************************/ static WORD saturation_closeXform (IP_XFORM_HANDLE hXform) { PSAT_INST g; HANDLE_TO_PTR (hXform, g); g->dwValidChk = 0; IP_MEM_FREE (g); /* free memory for the instance */ return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * saturationTbl - Jump-table for transform driver * \*****************************************************************************/ IP_XFORM_TBL saturationTbl = { saturation_openXform, saturation_setDefaultInputTraits, saturation_setXformSpec, saturation_getHeaderBufSize, saturation_getActualTraits, saturation_getActualBufSizes, saturation_convert, saturation_newPage, saturation_insertedData, saturation_closeXform }; /* End of File */