/* 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. */ /******************************************************************************\ * * xfakemono.c - Simulates grayscale or bilevel in 24-bit data. * ****************************************************************************** * * Name of Global Jump-Table: * * fakeMonoTbl * * Items in aXformInfo array passed into setXformSpec: * * aXformInfo[IP_FAKE_MONO_BPP] = 8 or 1, to simulate grayscale or mono * * Capabilities and Limitations: * * The input and output image are 24-bits per pixel. But the output image * will *appear* to be grayscale if aXformInfo[0] == 8, or bilevel if it == 1. * * Default Input Traits, and Output Traits: * * trait default input output * ------------------- --------------------- ------------------------ * iPixelsPerRow * passed into output same as default input * iBitsPerPixel * must be 24 24 * iComponentsPerPixel * must be 3 3 * 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). * \******************************************************************************/ // Use the #define below if this transform will exist in a dll outside of the // image pipeline. This will allow the functions to be exported. // #define EXPORT_TRANFORM 1 #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 #ifdef EXPORT_TRANSFORM #define FUNC_STATUS __declspec (dllexport) #else #define FUNC_STATUS static #endif typedef struct { IP_IMAGE_TRAITS traits; /* traits of the input and output image */ int iFakeDPI; /* dpi to fake (8 or 1) */ 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 */ } FMON_INST, *PFMON_INST; /*****************************************************************************\ * * fakeMono_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. * \*****************************************************************************/ FUNC_STATUS WORD fakeMono_openXform ( IP_XFORM_HANDLE *pXform) /* out: returned handle */ { PFMON_INST g; INSURE (pXform != NULL); IP_MEM_ALLOC (sizeof(FMON_INST), g); *pXform = g; memset (g, 0, sizeof(FMON_INST)); g->dwValidChk = CHECK_VALUE; g->iFakeDPI = 8; return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * fakeMono_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. * \*****************************************************************************/ FUNC_STATUS WORD fakeMono_setDefaultInputTraits ( IP_XFORM_HANDLE hXform, /* in: handle for xform */ PIP_IMAGE_TRAITS pTraits) /* in: default image traits */ { PFMON_INST g; HANDLE_TO_PTR (hXform, g); /* insure that traits we care about are known */ INSURE (pTraits->iPixelsPerRow > 0 && pTraits->iBitsPerPixel == 24 && pTraits->iComponentsPerPixel == 3); 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; } /*****************************************************************************\ * * fakeMono_setXformSpec - Provides xform-specific information * \*****************************************************************************/ FUNC_STATUS WORD fakeMono_setXformSpec ( IP_XFORM_HANDLE hXform, /* in: handle for xform */ DWORD_OR_PVOID aXformInfo[]) /* in: xform information */ { PFMON_INST g; HANDLE_TO_PTR (hXform, g); g->iFakeDPI = aXformInfo[IP_FAKE_MONO_BPP].dword; INSURE (g->iFakeDPI==1 || g->iFakeDPI==8); return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * fakeMono_getHeaderBufSize- Returns size of input buf needed to hold header * \*****************************************************************************/ FUNC_STATUS WORD fakeMono_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; } /*****************************************************************************\ * * fakeMono_getActualTraits - Parses header, and returns input & output traits * \*****************************************************************************/ FUNC_STATUS WORD fakeMono_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 */ { PFMON_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; } /****************************************************************************\ * * fakeMono_getActualBufSizes - Returns buf sizes needed for remainder of job * \****************************************************************************/ FUNC_STATUS WORD fakeMono_getActualBufSizes ( IP_XFORM_HANDLE hXform, /* in: handle for xform */ PDWORD pdwMinInBufLen, /* out: min input buf size */ PDWORD pdwMinOutBufLen) /* out: min output buf size */ { PFMON_INST g; HANDLE_TO_PTR (hXform, g); *pdwMinInBufLen = *pdwMinOutBufLen = g->dwBytesPerRow; return IP_DONE; fatal_error: return IP_FATAL_ERROR; } /*****************************************************************************\ * * fakeMono_convert - Converts one row * \*****************************************************************************/ FUNC_STATUS WORD fakeMono_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 */ { PFMON_INST g; int nBytes; PBYTE pIn, pInAfter, pOut; unsigned rv, gv, bv; int gray; HANDLE_TO_PTR (hXform, g); /**** Check if we were told to flush ****/ if (pbInputBuf == NULL) { PRINT (_T("fakeMono_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; pInAfter = pIn + nBytes; if (g->iFakeDPI == 1) { // faking bi-level while (pIn < pInAfter) { rv = *pIn++; gv = *pIn++; bv = *pIn++; gray = NTSC_LUMINANCE (rv, gv, bv); gray = (gray >= 128) ? 255 : 0; *pOut++ = (BYTE)gray; *pOut++ = (BYTE)gray; *pOut++ = (BYTE)gray; } } else { // faking grayscale while (pIn < pInAfter) { rv = *pIn++; gv = *pIn++; bv = *pIn++; gray = NTSC_LUMINANCE (rv, gv, bv); *pOut++ = (BYTE)gray; *pOut++ = (BYTE)gray; *pOut++ = (BYTE)gray; } } *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; } /*****************************************************************************\ * * fakeMono_insertedData - client inserted into our output stream * \*****************************************************************************/ FUNC_STATUS WORD fakeMono_insertedData ( IP_XFORM_HANDLE hXform, DWORD dwNumBytes) { fatalBreakPoint (); return IP_FATAL_ERROR; /* must never be called (can't insert data) */ } /*****************************************************************************\ * * fakeMono_newPage - Tells us to flush this page, and start a new page * \*****************************************************************************/ FUNC_STATUS WORD fakeMono_newPage ( IP_XFORM_HANDLE hXform) { PFMON_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; } /*****************************************************************************\ * * fakeMono_closeXform - Destroys this instance * \*****************************************************************************/ FUNC_STATUS WORD fakeMono_closeXform (IP_XFORM_HANDLE hXform) { PFMON_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; } /*****************************************************************************\ * * fakeMonoTbl - Jump-table for transform driver * \*****************************************************************************/ #ifdef EXPORT_TRANSFORM __declspec (dllexport) #endif IP_XFORM_TBL fakeMonoTbl = { fakeMono_openXform, fakeMono_setDefaultInputTraits, fakeMono_setXformSpec, fakeMono_getHeaderBufSize, fakeMono_getActualTraits, fakeMono_getActualBufSizes, fakeMono_convert, fakeMono_newPage, fakeMono_insertedData, fakeMono_closeXform }; /* End of File */ /*****************************************************************************\ * * ipGetXformTable - Returns pointer to the jump table * \*****************************************************************************/ #ifdef EXPORT_TRANSFORM EXPORT(WORD) ipGetXformTable (LPIP_XFORM_TBL pXform) { WORD wRet = IP_DONE; if (pXform) *pXform = clrmapTbl; else wRet = IP_FATAL_ERROR; return wRet; } #endif