/* 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. */ /******************************************************************************\ * * xyxtract.c - Y-extract - Extracts Y-component from YCC color data * ****************************************************************************** * * Name of Global Jump-Table: * * yXtractTbl * * Items in aXformInfo array passed into setXformSpec: * * xXformInfo[IP_Y_EXTRACT_COLOR_SPACE] tells us something about the color-space * of input data: See the enum IP_Y_EXTRACT_WHICH_SPACE: * IP_Y_EXTRACT_LUM_CHROME = luminance-chrominance, we merely fetch 1st component, * IP_Y_EXTRACT_RGB = input is RGB, * IP_Y_EXTRACT_BGR = input is BGR. * * Capabilities and Limitations: * * Inputs rows of 24-bit color data, and outputs rows of 8-bit gray * consisting of the first component of the color data. * * Default Input Traits, and Output Traits: * * trait default input output * ------------------- --------------------- ------------------------ * iPixelsPerRow * passed into output same as default input * iBitsPerPixel * must be 24 8 * iComponentsPerPixel * must be 3 1 * 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). * * Jan 1998 Mark Overton -- wrote 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 0x1ce5ca7e typedef struct { IP_IMAGE_TRAITS inTraits; /* traits of the input image */ IP_Y_EXTRACT_WHICH_SPACE eInputType; /* type of input data */ 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 */ } YEX_INST, *PYEX_INST; /*****************************************************************************\ * * yXtract_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 yXtract_openXform ( IP_XFORM_HANDLE *pXform) /* out: returned handle */ { PYEX_INST g; INSURE (pXform != NULL); IP_MEM_ALLOC (sizeof(YEX_INST), g); *pXform = g; memset (g, 0, sizeof(YEX_INST)); g->dwValidChk = CHECK_VALUE; return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * yXtract_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 yXtract_setDefaultInputTraits ( IP_XFORM_HANDLE hXform, /* in: handle for xform */ PIP_IMAGE_TRAITS pTraits) /* in: default image traits */ { PYEX_INST g; HANDLE_TO_PTR (hXform, g); /* Insure that values we care about are correct */ INSURE (pTraits->iBitsPerPixel == 24); INSURE (pTraits->iComponentsPerPixel == 3); INSURE (pTraits->iPixelsPerRow > 0); g->inTraits = *pTraits; /* a structure copy */ return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * yXtract_setXformSpec - Provides xform-specific information * \*****************************************************************************/ static WORD yXtract_setXformSpec ( IP_XFORM_HANDLE hXform, /* in: handle for xform */ DWORD_OR_PVOID aXformInfo[]) /* in: xform information */ { PYEX_INST g; HANDLE_TO_PTR (hXform, g); g->eInputType = (IP_Y_EXTRACT_WHICH_SPACE)aXformInfo[IP_Y_EXTRACT_COLOR_SPACE].dword; return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * yXtract_getHeaderBufSize- Returns size of input buf needed to hold header * \*****************************************************************************/ static WORD yXtract_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; } /*****************************************************************************\ * * yXtract_getActualTraits - Parses header, and returns input & output traits * \*****************************************************************************/ static WORD yXtract_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 */ { PYEX_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->inTraits; *pOutTraits = g->inTraits; pOutTraits->iBitsPerPixel = 8; pOutTraits->iComponentsPerPixel = 1; return IP_DONE | IP_READY_FOR_DATA; fatal_error: return IP_FATAL_ERROR; } /****************************************************************************\ * * yXtract_getActualBufSizes - Returns buf sizes needed for remainder of job * \****************************************************************************/ static WORD yXtract_getActualBufSizes ( IP_XFORM_HANDLE hXform, /* in: handle for xform */ PDWORD pdwMinInBufLen, /* out: min input buf size */ PDWORD pdwMinOutBufLen) /* out: min output buf size */ { PYEX_INST g; HANDLE_TO_PTR (hXform, g); *pdwMinInBufLen = 3 * g->inTraits.iPixelsPerRow; *pdwMinOutBufLen = g->inTraits.iPixelsPerRow; return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * yXtract_convert - Converts one row * \*****************************************************************************/ static WORD yXtract_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 */ { PYEX_INST g; int inBytes, outBytes; PBYTE pIn, pOut, pOutAfter; UINT red, grn, blu; HANDLE_TO_PTR (hXform, g); /**** Check if we were told to flush ****/ if (pbInputBuf == NULL) { PRINT (_T("yXtract_convert: Told to flush.\n"), 0, 0); *pdwInputUsed = *pdwOutputUsed = 0; *pdwInputNextPos = g->dwInNextPos; *pdwOutputThisPos = g->dwOutNextPos; return IP_DONE; } /**** Output a Row ****/ outBytes = g->inTraits.iPixelsPerRow; inBytes = 3 * outBytes; INSURE (dwInputAvail >= (DWORD)inBytes ); INSURE (dwOutputAvail >= (DWORD)outBytes); pIn = pbInputBuf; pOut = pbOutputBuf; pOutAfter = pOut + outBytes; switch (g->eInputType) { case IP_Y_EXTRACT_LUM_CHROME: while (pOut < pOutAfter) { *pOut++ = *pIn; pIn += 3; } break; case IP_Y_EXTRACT_RGB: while (pOut < pOutAfter) { red = (UINT)(*pIn++); grn = (UINT)(*pIn++); blu = (UINT)(*pIn++); /* the formula below is: Y = (5*R + 9*G + 2*B) / 16 */ *pOut++ = (BYTE)((((red<<2)+red) + ((grn<<3)+grn) + (blu<<1) + 8) >> 4); } break; case IP_Y_EXTRACT_BGR: while (pOut < pOutAfter) { blu = (UINT)(*pIn++); grn = (UINT)(*pIn++); red = (UINT)(*pIn++); /* the formula below is: Y = (5*R + 9*G + 2*B) / 16 */ *pOut++ = (BYTE)((((red<<2)+red) + ((grn<<3)+grn) + (blu<<1) + 8) >> 4); } break; default: goto fatal_error; } *pdwInputUsed = inBytes; g->dwInNextPos += inBytes; *pdwInputNextPos = g->dwInNextPos; *pdwOutputUsed = outBytes; *pdwOutputThisPos = g->dwOutNextPos; g->dwOutNextPos += outBytes; g->dwRowsDone += 1; return IP_CONSUMED_ROW | IP_PRODUCED_ROW | IP_READY_FOR_DATA; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * yXtract_insertedData - client inserted into our output stream * \*****************************************************************************/ static WORD yXtract_insertedData ( IP_XFORM_HANDLE hXform, DWORD dwNumBytes) { fatalBreakPoint (); return IP_FATAL_ERROR; /* must never be called (can't insert data) */ } /*****************************************************************************\ * * yXtract_newPage - Tells us to flush this page, and start a new page * \*****************************************************************************/ static WORD yXtract_newPage ( IP_XFORM_HANDLE hXform) { PYEX_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; } /*****************************************************************************\ * * yXtract_closeXform - Destroys this instance * \*****************************************************************************/ static WORD yXtract_closeXform (IP_XFORM_HANDLE hXform) { PYEX_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; } /*****************************************************************************\ * * yXtractTbl - Jump-table for encoder * \*****************************************************************************/ IP_XFORM_TBL yXtractTbl = { yXtract_openXform, yXtract_setDefaultInputTraits, yXtract_setXformSpec, yXtract_getHeaderBufSize, yXtract_getActualTraits, yXtract_getActualBufSizes, yXtract_convert, yXtract_newPage, yXtract_insertedData, yXtract_closeXform }; /* End of File */