pdfio1.c

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/*====================================================================*
 -  Copyright (C) 2001 Leptonica.  All rights reserved.
 -
 -  Redistribution and use in source and binary forms, with or without
 -  modification, are permitted provided that the following conditions
 -  are met:
 -  1. Redistributions of source code must retain the above copyright
 -     notice, this list of conditions and the following disclaimer.
 -  2. Redistributions in binary form must reproduce the above
 -     copyright notice, this list of conditions and the following
 -     disclaimer in the documentation and/or other materials
 -     provided with the distribution.
 -
 -  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 -  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 -  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 -  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ANY
 -  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 -  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 -  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 -  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 -  OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 -  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 -  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *====================================================================*/
 
#ifdef HAVE_CONFIG_H
#include <config_auto.h>
#endif  /* HAVE_CONFIG_H */
 
#include <string.h>
#include <math.h>
#include "allheaders.h"
 
/* --------------------------------------------*/
#if  USE_PDFIO   /* defined in environ.h */
 /* --------------------------------------------*/
 
    /* Typical scan resolution in ppi (pixels/inch) */
static const l_int32  DefaultInputRes = 300;
 
/*---------------------------------------------------------------------*
 *    Convert specified image files to pdf (one image file per page)   *
 *---------------------------------------------------------------------*/
l_ok
convertFilesToPdf(const char  *dirname,
                  const char  *substr,
                  l_int32      res,
                  l_float32    scalefactor,
                  l_int32      type,
                  l_int32      quality,
                  const char  *title,
                  const char  *fileout)
{
l_int32  ret;
SARRAY  *sa;
 
    PROCNAME("convertFilesToPdf");
 
    if (!dirname)
        return ERROR_INT("dirname not defined", procName, 1);
    if (!fileout)
        return ERROR_INT("fileout not defined", procName, 1);
 
    if ((sa = getSortedPathnamesInDirectory(dirname, substr, 0, 0)) == NULL)
        return ERROR_INT("sa not made", procName, 1);
    ret = saConvertFilesToPdf(sa, res, scalefactor, type, quality,
                              title, fileout);
    sarrayDestroy(&sa);
    return ret;
}
 
 
l_ok
saConvertFilesToPdf(SARRAY      *sa,
                    l_int32      res,
                    l_float32    scalefactor,
                    l_int32      type,
                    l_int32      quality,
                    const char  *title,
                    const char  *fileout)
{
l_uint8  *data;
l_int32   ret;
size_t    nbytes;
 
    PROCNAME("saConvertFilesToPdf");
 
    if (!sa)
        return ERROR_INT("sa not defined", procName, 1);
 
    ret = saConvertFilesToPdfData(sa, res, scalefactor, type, quality,
                                  title, &data, &nbytes);
    if (ret) {
        if (data) LEPT_FREE(data);
        return ERROR_INT("pdf data not made", procName, 1);
    }
 
    ret = l_binaryWrite(fileout, "w", data, nbytes);
    LEPT_FREE(data);
    if (ret)
        L_ERROR("pdf data not written to file\n", procName);
    return ret;
}
 
 
l_ok
saConvertFilesToPdfData(SARRAY      *sa,
                        l_int32      res,
                        l_float32    scalefactor,
                        l_int32      type,
                        l_int32      quality,
                        const char  *title,
                        l_uint8    **pdata,
                        size_t      *pnbytes)
{
char        *fname;
const char  *pdftitle;
l_uint8     *imdata;
l_int32      i, n, ret, pagetype, npages, scaledres;
size_t       imbytes;
L_BYTEA     *ba;
PIX         *pixs, *pix;
L_PTRA      *pa_data;
 
    PROCNAME("saConvertFilesToPdfData");
 
    if (!pdata)
        return ERROR_INT("&data not defined", procName, 1);
    *pdata = NULL;
    if (!pnbytes)
        return ERROR_INT("&nbytes not defined", procName, 1);
    *pnbytes = 0;
    if (!sa)
        return ERROR_INT("sa not defined", procName, 1);
    if (scalefactor <= 0.0) scalefactor = 1.0;
    if (type != L_JPEG_ENCODE && type != L_G4_ENCODE &&
        type != L_FLATE_ENCODE && type != L_JP2K_ENCODE) {
        type = L_DEFAULT_ENCODE;
    }
 
        /* Generate all the encoded pdf strings */
    n = sarrayGetCount(sa);
    pa_data = ptraCreate(n);
    pdftitle = NULL;
    for (i = 0; i < n; i++) {
        if (i && (i % 10 == 0)) lept_stderr(".. %d ", i);
        fname = sarrayGetString(sa, i, L_NOCOPY);
        if ((pixs = pixRead(fname)) == NULL) {
            L_ERROR("image not readable from file %s\n", procName, fname);
            continue;
        }
        if (!pdftitle)
            pdftitle = (title) ? title : fname;
        if (scalefactor != 1.0)
            pix = pixScale(pixs, scalefactor, scalefactor);
        else
            pix = pixClone(pixs);
        pixDestroy(&pixs);
        scaledres = (l_int32)(res * scalefactor);
 
            /* Select the encoding type */
        if (type != L_DEFAULT_ENCODE) {
            pagetype = type;
        } else if (selectDefaultPdfEncoding(pix, &pagetype) != 0) {
            pixDestroy(&pix);
            L_ERROR("encoding type selection failed for file %s\n",
                    procName, fname);
            continue;
        }
 
        ret = pixConvertToPdfData(pix, pagetype, quality, &imdata, &imbytes,
                                  0, 0, scaledres, pdftitle, NULL, 0);
        pixDestroy(&pix);
        if (ret) {
            LEPT_FREE(imdata);
            L_ERROR("pdf encoding failed for %s\n", procName, fname);
            continue;
        }
        ba = l_byteaInitFromMem(imdata, imbytes);
        LEPT_FREE(imdata);
        ptraAdd(pa_data, ba);
    }
    ptraGetActualCount(pa_data, &npages);
    if (npages == 0) {
        L_ERROR("no pdf files made\n", procName);
        ptraDestroy(&pa_data, FALSE, FALSE);
        return 1;
    }
 
        /* Concatenate them */
    lept_stderr("\nconcatenating ... ");
    ret = ptraConcatenatePdfToData(pa_data, NULL, pdata, pnbytes);
    lept_stderr("done\n");
 
    ptraGetActualCount(pa_data, &npages);  /* recalculate in case it changes */
    for (i = 0; i < npages; i++) {
        ba = (L_BYTEA *)ptraRemove(pa_data, i, L_NO_COMPACTION);
        l_byteaDestroy(&ba);
    }
    ptraDestroy(&pa_data, FALSE, FALSE);
    return ret;
}
 
 
l_ok
selectDefaultPdfEncoding(PIX      *pix,
                         l_int32  *ptype)
{
l_int32   w, h, d, factor, ncolors;
PIXCMAP  *cmap;
 
    PROCNAME("selectDefaultPdfEncoding");
 
    if (!ptype)
        return ERROR_INT("&type not defined", procName, 1);
    *ptype = L_FLATE_ENCODE;  /* default universal encoding */
    if (!pix)
        return ERROR_INT("pix not defined", procName, 1);
    pixGetDimensions(pix, &w, &h, &d);
    cmap = pixGetColormap(pix);
    if (d == 8 && !cmap) {
        factor = L_MAX(1, (l_int32)sqrt((l_float64)(w * h) / 20000.));
        pixNumColors(pix, factor, &ncolors);
        if (ncolors < 20)
            *ptype = L_FLATE_ENCODE;
        else
            *ptype = L_JPEG_ENCODE;
    } else if (d == 1) {
        *ptype = L_G4_ENCODE;
    } else if (cmap || d == 2 || d == 4) {
        *ptype = L_FLATE_ENCODE;
    } else if (d == 8 || d == 32) {
        *ptype = L_JPEG_ENCODE;
    } else {
        return ERROR_INT("type selection failure", procName, 1);
    }
 
    return 0;
}
 
 
/*---------------------------------------------------------------------*
 *          Convert specified image files to pdf without scaling       *
 *---------------------------------------------------------------------*/
l_ok
convertUnscaledFilesToPdf(const char  *dirname,
                          const char  *substr,
                          const char  *title,
                          const char  *fileout)
{
l_int32  ret;
SARRAY  *sa;
 
    PROCNAME("convertUnscaledFilesToPdf");
 
    if (!dirname)
        return ERROR_INT("dirname not defined", procName, 1);
    if (!fileout)
        return ERROR_INT("fileout not defined", procName, 1);
 
    if ((sa = getSortedPathnamesInDirectory(dirname, substr, 0, 0)) == NULL)
        return ERROR_INT("sa not made", procName, 1);
    ret = saConvertUnscaledFilesToPdf(sa, title, fileout);
    sarrayDestroy(&sa);
    return ret;
}
 
 
l_ok
saConvertUnscaledFilesToPdf(SARRAY      *sa,
                            const char  *title,
                            const char  *fileout)
{
l_uint8  *data;
l_int32   ret;
size_t    nbytes;
 
    PROCNAME("saConvertUnscaledFilesToPdf");
 
    if (!sa)
        return ERROR_INT("sa not defined", procName, 1);
 
    ret = saConvertUnscaledFilesToPdfData(sa, title, &data, &nbytes);
    if (ret) {
        if (data) LEPT_FREE(data);
        return ERROR_INT("pdf data not made", procName, 1);
    }
 
    ret = l_binaryWrite(fileout, "w", data, nbytes);
    LEPT_FREE(data);
    if (ret)
        L_ERROR("pdf data not written to file\n", procName);
    return ret;
}
 
 
l_ok
saConvertUnscaledFilesToPdfData(SARRAY      *sa,
                                const char  *title,
                                l_uint8    **pdata,
                                size_t      *pnbytes)
{
char         *fname;
l_uint8      *imdata;
l_int32       i, n, ret, npages;
size_t        imbytes;
L_BYTEA      *ba;
L_PTRA       *pa_data;
 
    PROCNAME("saConvertUnscaledFilesToPdfData");
 
    if (!pdata)
        return ERROR_INT("&data not defined", procName, 1);
    *pdata = NULL;
    if (!pnbytes)
        return ERROR_INT("&nbytes not defined", procName, 1);
    *pnbytes = 0;
    if (!sa)
        return ERROR_INT("sa not defined", procName, 1);
 
        /* Generate all the encoded pdf strings */
    n = sarrayGetCount(sa);
    pa_data = ptraCreate(n);
    for (i = 0; i < n; i++) {
        if (i && (i % 10 == 0)) lept_stderr(".. %d ", i);
        fname = sarrayGetString(sa, i, L_NOCOPY);
 
            /* Generate the pdf data */
        if (convertUnscaledToPdfData(fname, title, &imdata, &imbytes))
            continue;
 
            /* ... and add it to the array of single page data */
        ba = l_byteaInitFromMem(imdata, imbytes);
        if (imdata) LEPT_FREE(imdata);
        ptraAdd(pa_data, ba);
    }
    ptraGetActualCount(pa_data, &npages);
    if (npages == 0) {
        L_ERROR("no pdf files made\n", procName);
        ptraDestroy(&pa_data, FALSE, FALSE);
        return 1;
    }
 
        /* Concatenate to generate a multipage pdf */
    lept_stderr("\nconcatenating ... ");
    ret = ptraConcatenatePdfToData(pa_data, NULL, pdata, pnbytes);
    lept_stderr("done\n");
 
        /* Clean up */
    ptraGetActualCount(pa_data, &npages);  /* maybe failed to read some files */
    for (i = 0; i < npages; i++) {
        ba = (L_BYTEA *)ptraRemove(pa_data, i, L_NO_COMPACTION);
        l_byteaDestroy(&ba);
    }
    ptraDestroy(&pa_data, FALSE, FALSE);
    return ret;
}
 
 
l_ok
convertUnscaledToPdfData(const char  *fname,
                         const char  *title,
                         l_uint8    **pdata,
                         size_t      *pnbytes)
{
const char   *pdftitle = NULL;
char         *tail = NULL;
l_int32       format;
L_COMP_DATA  *cid;
 
    PROCNAME("convertUnscaledToPdfData");
 
    if (!pdata)
        return ERROR_INT("&data not defined", procName, 1);
    *pdata = NULL;
    if (!pnbytes)
        return ERROR_INT("&nbytes not defined", procName, 1);
    *pnbytes = 0;
    if (!fname)
        return ERROR_INT("fname not defined", procName, 1);
 
    findFileFormat(fname, &format);
    if (format == IFF_UNKNOWN) {
        L_WARNING("file %s format is unknown; skip\n", procName, fname);
        return 1;
    }
    if (format == IFF_PS || format == IFF_LPDF) {
        L_WARNING("file %s format is %d; skip\n", procName, fname, format);
        return 1;
    }
 
        /* Generate the image data required for pdf generation, always
         * in binary (not ascii85) coding.  Note that jpeg, jp2k and some
         * png files are not transcoded.  */
    l_generateCIDataForPdf(fname, NULL, 0, &cid);
    if (!cid) {
        L_ERROR("file %s format is %d; unreadable\n", procName, fname, format);
        return 1;
    }
 
        /* If %title == NULL, use the tail of %fname. */
    if (title) {
        pdftitle = title;
    } else {
        splitPathAtDirectory(fname, NULL, &tail);
        pdftitle = tail;
    }
 
        /* Generate the pdf string for this page (image).  This destroys
         * the cid by attaching it to an lpd and destroying the lpd. */
    cidConvertToPdfData(cid, pdftitle, pdata, pnbytes);
    LEPT_FREE(tail);
    return 0;
}
 
 
/*---------------------------------------------------------------------*
 *          Convert multiple images to pdf (one image per page)        *
 *---------------------------------------------------------------------*/
l_ok
pixaConvertToPdf(PIXA        *pixa,
                 l_int32      res,
                 l_float32    scalefactor,
                 l_int32      type,
                 l_int32      quality,
                 const char  *title,
                 const char  *fileout)
{
l_uint8  *data;
l_int32   ret;
size_t    nbytes;
 
    PROCNAME("pixaConvertToPdf");
 
    if (!pixa)
        return ERROR_INT("pixa not defined", procName, 1);
 
    ret = pixaConvertToPdfData(pixa, res, scalefactor, type, quality,
                               title, &data, &nbytes);
    if (ret) {
        LEPT_FREE(data);
        return ERROR_INT("conversion to pdf failed", procName, 1);
    }
 
    ret = l_binaryWrite(fileout, "w", data, nbytes);
    LEPT_FREE(data);
    if (ret)
        L_ERROR("pdf data not written to file\n", procName);
    return ret;
}
 
 
l_ok
pixaConvertToPdfData(PIXA        *pixa,
                     l_int32      res,
                     l_float32    scalefactor,
                     l_int32      type,
                     l_int32      quality,
                     const char  *title,
                     l_uint8    **pdata,
                     size_t      *pnbytes)
{
l_uint8  *imdata;
l_int32   i, n, ret, scaledres, pagetype;
size_t    imbytes;
L_BYTEA  *ba;
PIX      *pixs, *pix;
L_PTRA   *pa_data;
 
    PROCNAME("pixaConvertToPdfData");
 
    if (!pdata)
        return ERROR_INT("&data not defined", procName, 1);
    *pdata = NULL;
    if (!pnbytes)
        return ERROR_INT("&nbytes not defined", procName, 1);
    *pnbytes = 0;
    if (!pixa)
        return ERROR_INT("pixa not defined", procName, 1);
    if (scalefactor <= 0.0) scalefactor = 1.0;
    if (type != L_DEFAULT_ENCODE && type != L_JPEG_ENCODE &&
        type != L_G4_ENCODE && type != L_FLATE_ENCODE &&
        type != L_JP2K_ENCODE) {
        L_WARNING("invalid compression type; using per-page default\n",
                  procName);
        type = L_DEFAULT_ENCODE;
    }
 
        /* Generate all the encoded pdf strings */
    n = pixaGetCount(pixa);
    pa_data = ptraCreate(n);
    for (i = 0; i < n; i++) {
        if ((pixs = pixaGetPix(pixa, i, L_CLONE)) == NULL) {
            L_ERROR("pix[%d] not retrieved\n", procName, i);
            continue;
        }
        if (scalefactor != 1.0)
            pix = pixScale(pixs, scalefactor, scalefactor);
        else
            pix = pixClone(pixs);
        pixDestroy(&pixs);
        scaledres = (l_int32)(res * scalefactor);
 
            /* Select the encoding type */
        if (type != L_DEFAULT_ENCODE) {
            pagetype = type;
        } else if (selectDefaultPdfEncoding(pix, &pagetype) != 0) {
            L_ERROR("encoding type selection failed for pix[%d]\n",
                        procName, i);
            pixDestroy(&pix);
            continue;
        }
 
        ret = pixConvertToPdfData(pix, pagetype, quality, &imdata, &imbytes,
                                  0, 0, scaledres, title, NULL, 0);
        pixDestroy(&pix);
        if (ret) {
            LEPT_FREE(imdata);
            L_ERROR("pdf encoding failed for pix[%d]\n", procName, i);
            continue;
        }
        ba = l_byteaInitFromMem(imdata, imbytes);
        LEPT_FREE(imdata);
        ptraAdd(pa_data, ba);
    }
    ptraGetActualCount(pa_data, &n);
    if (n == 0) {
        L_ERROR("no pdf files made\n", procName);
        ptraDestroy(&pa_data, FALSE, FALSE);
        return 1;
    }
 
        /* Concatenate them */
    ret = ptraConcatenatePdfToData(pa_data, NULL, pdata, pnbytes);
 
    ptraGetActualCount(pa_data, &n);  /* recalculate in case it changes */
    for (i = 0; i < n; i++) {
        ba = (L_BYTEA *)ptraRemove(pa_data, i, L_NO_COMPACTION);
        l_byteaDestroy(&ba);
    }
    ptraDestroy(&pa_data, FALSE, FALSE);
    return ret;
}
 
 
/*---------------------------------------------------------------------*
 *                Single page, multi-image converters                  *
 *---------------------------------------------------------------------*/
l_ok
convertToPdf(const char   *filein,
             l_int32       type,
             l_int32       quality,
             const char   *fileout,
             l_int32       x,
             l_int32       y,
             l_int32       res,
             const char   *title,
             L_PDF_DATA  **plpd,
             l_int32       position)
{
l_uint8  *data;
l_int32   ret;
size_t    nbytes;
 
    PROCNAME("convertToPdf");
 
    if (!filein)
        return ERROR_INT("filein not defined", procName, 1);
    if (!plpd || (position == L_LAST_IMAGE)) {
        if (!fileout)
            return ERROR_INT("fileout not defined", procName, 1);
    }
 
    if (convertToPdfData(filein, type, quality, &data, &nbytes, x, y,
                         res, title, plpd, position))
        return ERROR_INT("pdf data not made", procName, 1);
 
    if (!plpd || (position == L_LAST_IMAGE)) {
        ret = l_binaryWrite(fileout, "w", data, nbytes);
        LEPT_FREE(data);
        if (ret)
            return ERROR_INT("pdf data not written to file", procName, 1);
    }
 
    return 0;
}
 
 
l_ok
convertImageDataToPdf(l_uint8      *imdata,
                      size_t        size,
                      l_int32       type,
                      l_int32       quality,
                      const char   *fileout,
                      l_int32       x,
                      l_int32       y,
                      l_int32       res,
                      const char   *title,
                      L_PDF_DATA  **plpd,
                      l_int32       position)
{
l_int32  ret;
PIX     *pix;
 
    PROCNAME("convertImageDataToPdf");
 
    if (!imdata)
        return ERROR_INT("image data not defined", procName, 1);
    if (!plpd || (position == L_LAST_IMAGE)) {
        if (!fileout)
            return ERROR_INT("fileout not defined", procName, 1);
    }
 
    if ((pix = pixReadMem(imdata, size)) == NULL)
        return ERROR_INT("pix not read", procName, 1);
    if (type != L_JPEG_ENCODE && type != L_G4_ENCODE &&
        type != L_FLATE_ENCODE && type != L_JP2K_ENCODE) {
        selectDefaultPdfEncoding(pix, &type);
    }
    ret = pixConvertToPdf(pix, type, quality, fileout, x, y, res,
                          title, plpd, position);
    pixDestroy(&pix);
    return ret;
}
 
 
l_ok
convertToPdfData(const char   *filein,
                 l_int32       type,
                 l_int32       quality,
                 l_uint8     **pdata,
                 size_t       *pnbytes,
                 l_int32       x,
                 l_int32       y,
                 l_int32       res,
                 const char   *title,
                 L_PDF_DATA  **plpd,
                 l_int32       position)
{
PIX  *pix;
 
    PROCNAME("convertToPdfData");
 
    if (!pdata)
        return ERROR_INT("&data not defined", procName, 1);
    *pdata = NULL;
    if (!pnbytes)
        return ERROR_INT("&nbytes not defined", procName, 1);
    *pnbytes = 0;
    if (!filein)
        return ERROR_INT("filein not defined", procName, 1);
 
    if ((pix = pixRead(filein)) == NULL)
        return ERROR_INT("pix not made", procName, 1);
 
    pixConvertToPdfData(pix, type, quality, pdata, pnbytes,
                        x, y, res, (title) ? title : filein, plpd, position);
    pixDestroy(&pix);
    return 0;
}
 
 
l_ok
convertImageDataToPdfData(l_uint8      *imdata,
                          size_t        size,
                          l_int32       type,
                          l_int32       quality,
                          l_uint8     **pdata,
                          size_t       *pnbytes,
                          l_int32       x,
                          l_int32       y,
                          l_int32       res,
                          const char   *title,
                          L_PDF_DATA  **plpd,
                          l_int32       position)
{
l_int32  ret;
PIX     *pix;
 
    PROCNAME("convertImageDataToPdfData");
 
    if (!pdata)
        return ERROR_INT("&data not defined", procName, 1);
    *pdata = NULL;
    if (!pnbytes)
        return ERROR_INT("&nbytes not defined", procName, 1);
    *pnbytes = 0;
    if (!imdata)
        return ERROR_INT("image data not defined", procName, 1);
    if (plpd) {  /* part of multi-page invocation */
        if (position == L_FIRST_IMAGE)
            *plpd = NULL;
    }
 
    if ((pix = pixReadMem(imdata, size)) == NULL)
        return ERROR_INT("pix not read", procName, 1);
    if (type != L_JPEG_ENCODE && type != L_G4_ENCODE &&
        type != L_FLATE_ENCODE && type != L_JP2K_ENCODE) {
        selectDefaultPdfEncoding(pix, &type);
    }
    ret = pixConvertToPdfData(pix, type, quality, pdata, pnbytes,
                              x, y, res, title, plpd, position);
    pixDestroy(&pix);
    return ret;
}
 
 
l_ok
pixConvertToPdf(PIX          *pix,
                l_int32       type,
                l_int32       quality,
                const char   *fileout,
                l_int32       x,
                l_int32       y,
                l_int32       res,
                const char   *title,
                L_PDF_DATA  **plpd,
                l_int32       position)
{
l_uint8  *data;
l_int32   ret;
size_t    nbytes;
 
    PROCNAME("pixConvertToPdf");
 
    if (!pix)
        return ERROR_INT("pix not defined", procName, 1);
    if (!plpd || (position == L_LAST_IMAGE)) {
        if (!fileout)
            return ERROR_INT("fileout not defined", procName, 1);
    }
 
    if (pixConvertToPdfData(pix, type, quality, &data, &nbytes,
                            x, y, res, title, plpd, position)) {
        LEPT_FREE(data);
        return ERROR_INT("pdf data not made", procName, 1);
    }
 
    if (!plpd || (position == L_LAST_IMAGE)) {
        ret = l_binaryWrite(fileout, "w", data, nbytes);
        LEPT_FREE(data);
        if (ret)
            return ERROR_INT("pdf data not written to file", procName, 1);
    }
    return 0;
}
 
 
l_ok
pixWriteStreamPdf(FILE        *fp,
                  PIX         *pix,
                  l_int32      res,
                  const char  *title)
{
l_uint8  *data;
size_t    nbytes, nbytes_written;
 
    PROCNAME("pixWriteStreamPdf");
 
    if (!fp)
        return ERROR_INT("stream not opened", procName, 1);
    if (!pix)
        return ERROR_INT("pix not defined", procName, 1);
 
    if (pixWriteMemPdf(&data, &nbytes, pix, res, title) != 0) {
        LEPT_FREE(data);
        return ERROR_INT("pdf data not made", procName, 1);
    }
 
    nbytes_written = fwrite(data, 1, nbytes, fp);
    LEPT_FREE(data);
    if (nbytes != nbytes_written)
        return ERROR_INT("failure writing pdf data to stream", procName, 1);
    return 0;
}
 
 
l_ok
pixWriteMemPdf(l_uint8    **pdata,
               size_t      *pnbytes,
               PIX         *pix,
               l_int32      res,
               const char  *title)
{
l_int32  ret, type;
 
    PROCNAME("pixWriteMemPdf");
 
    if (pdata) *pdata = NULL;
    if (pnbytes) *pnbytes = 0;
    if (!pdata || !pnbytes)
        return ERROR_INT("&data or &nbytes not defined", procName, 1);
    if (!pix)
        return ERROR_INT("pix not defined", procName, 1);
 
    selectDefaultPdfEncoding(pix, &type);
    ret = pixConvertToPdfData(pix, type, 75, pdata, pnbytes,
                              0, 0, res, title, NULL, 0);
    if (ret)
        return ERROR_INT("pdf data not made", procName, 1);
    return 0;
}
 
 
/*---------------------------------------------------------------------*
 *            Segmented multi-page, multi-image converter              *
 *---------------------------------------------------------------------*/
l_ok
convertSegmentedFilesToPdf(const char  *dirname,
                           const char  *substr,
                           l_int32      res,
                           l_int32      type,
                           l_int32      thresh,
                           BOXAA       *baa,
                           l_int32      quality,
                           l_float32    scalefactor,
                           const char  *title,
                           const char  *fileout)
{
char     *fname;
l_uint8  *imdata, *data;
l_int32   i, npages, nboxa, nboxes, ret;
size_t    imbytes, databytes;
BOXA     *boxa;
L_BYTEA  *ba;
L_PTRA   *pa_data;
SARRAY   *sa;
 
    PROCNAME("convertSegmentedFilesToPdf");
 
    if (!dirname)
        return ERROR_INT("dirname not defined", procName, 1);
    if (!fileout)
        return ERROR_INT("fileout not defined", procName, 1);
 
    if ((sa = getNumberedPathnamesInDirectory(dirname, substr, 0, 0, 10000))
            == NULL)
        return ERROR_INT("sa not made", procName, 1);
 
    npages = sarrayGetCount(sa);
        /* If necessary, extend the boxaa, which is page-aligned with
         * the image files, to be as large as the set of images. */
    if (baa) {
        nboxa = boxaaGetCount(baa);
        if (nboxa < npages) {
            boxa = boxaCreate(1);
            boxaaExtendWithInit(baa, npages, boxa);
            boxaDestroy(&boxa);
        }
    }
 
        /* Generate and save all the encoded pdf strings */
    pa_data = ptraCreate(npages);
    for (i = 0; i < npages; i++) {
        fname = sarrayGetString(sa, i, L_NOCOPY);
        if (!strcmp(fname, "")) continue;
        boxa = NULL;
        if (baa) {
            boxa = boxaaGetBoxa(baa, i, L_CLONE);
            nboxes = boxaGetCount(boxa);
            if (nboxes == 0)
                boxaDestroy(&boxa);
        }
        ret = convertToPdfDataSegmented(fname, res, type, thresh, boxa,
                                        quality, scalefactor, title,
                                        &imdata, &imbytes);
        boxaDestroy(&boxa);  /* safe; in case nboxes > 0 */
        if (ret) {
            L_ERROR("pdf encoding failed for %s\n", procName, fname);
            continue;
        }
        ba = l_byteaInitFromMem(imdata, imbytes);
        if (imdata) LEPT_FREE(imdata);
        ptraAdd(pa_data, ba);
    }
    sarrayDestroy(&sa);
 
    ptraGetActualCount(pa_data, &npages);
    if (npages == 0) {
        L_ERROR("no pdf files made\n", procName);
        ptraDestroy(&pa_data, FALSE, FALSE);
        return 1;
    }
 
        /* Concatenate */
    ret = ptraConcatenatePdfToData(pa_data, NULL, &data, &databytes);
 
        /* Clean up */
    ptraGetActualCount(pa_data, &npages);  /* recalculate in case it changes */
    for (i = 0; i < npages; i++) {
        ba = (L_BYTEA *)ptraRemove(pa_data, i, L_NO_COMPACTION);
        l_byteaDestroy(&ba);
    }
    ptraDestroy(&pa_data, FALSE, FALSE);
 
    if (ret) {
        if (data) LEPT_FREE(data);
        return ERROR_INT("pdf data not made", procName, 1);
    }
 
    ret = l_binaryWrite(fileout, "w", data, databytes);
    LEPT_FREE(data);
    if (ret)
        L_ERROR("pdf data not written to file\n", procName);
    return ret;
}
 
 
BOXAA *
convertNumberedMasksToBoxaa(const char  *dirname,
                            const char  *substr,
                            l_int32      numpre,
                            l_int32      numpost)
{
char    *fname;
l_int32  i, n;
BOXA    *boxa;
BOXAA   *baa;
PIX     *pix;
SARRAY  *sa;
 
    PROCNAME("convertNumberedMasksToBoxaa");
 
    if (!dirname)
        return (BOXAA *)ERROR_PTR("dirname not defined", procName, NULL);
 
    if ((sa = getNumberedPathnamesInDirectory(dirname, substr, numpre,
                                              numpost, 10000)) == NULL)
        return (BOXAA *)ERROR_PTR("sa not made", procName, NULL);
 
        /* Generate and save all the encoded pdf strings */
    n = sarrayGetCount(sa);
    baa = boxaaCreate(n);
    boxa = boxaCreate(1);
    boxaaInitFull(baa, boxa);
    boxaDestroy(&boxa);
    for (i = 0; i < n; i++) {
        fname = sarrayGetString(sa, i, L_NOCOPY);
        if (!strcmp(fname, "")) continue;
        if ((pix = pixRead(fname)) == NULL) {
            L_WARNING("invalid image on page %d\n", procName, i);
            continue;
        }
        boxa = pixConnComp(pix, NULL, 8);
        boxaaReplaceBoxa(baa, i, boxa);
        pixDestroy(&pix);
    }
 
    sarrayDestroy(&sa);
    return baa;
}
 
 
/*---------------------------------------------------------------------*
 *            Segmented single page, multi-image converters            *
 *---------------------------------------------------------------------*/
l_ok
convertToPdfSegmented(const char  *filein,
                      l_int32      res,
                      l_int32      type,
                      l_int32      thresh,
                      BOXA        *boxa,
                      l_int32      quality,
                      l_float32    scalefactor,
                      const char  *title,
                      const char  *fileout)
{
l_int32  ret;
PIX     *pixs;
 
    PROCNAME("convertToPdfSegmented");
 
    if (!filein)
        return ERROR_INT("filein not defined", procName, 1);
    if (!fileout)
        return ERROR_INT("fileout not defined", procName, 1);
    if (type != L_G4_ENCODE && type != L_JPEG_ENCODE &&
        type != L_FLATE_ENCODE)
        return ERROR_INT("invalid conversion type", procName, 1);
    if (boxa && scalefactor > 1.0) {
        L_WARNING("setting scalefactor to 1.0\n", procName);
        scalefactor = 1.0;
    }
 
    if ((pixs = pixRead(filein)) == NULL)
        return ERROR_INT("pixs not made", procName, 1);
 
    ret = pixConvertToPdfSegmented(pixs, res, type, thresh, boxa, quality,
                                   scalefactor, (title) ? title : filein,
                                   fileout);
    pixDestroy(&pixs);
    return ret;
}
 
 
l_ok
pixConvertToPdfSegmented(PIX         *pixs,
                         l_int32      res,
                         l_int32      type,
                         l_int32      thresh,
                         BOXA        *boxa,
                         l_int32      quality,
                         l_float32    scalefactor,
                         const char  *title,
                         const char  *fileout)
{
l_uint8  *data;
l_int32   ret;
size_t    nbytes;
 
    PROCNAME("pixConvertToPdfSegmented");
 
    if (!pixs)
        return ERROR_INT("pixs not defined", procName, 1);
    if (!fileout)
        return ERROR_INT("fileout not defined", procName, 1);
    if (type != L_G4_ENCODE && type != L_JPEG_ENCODE &&
        type != L_FLATE_ENCODE)
        return ERROR_INT("invalid conversion type", procName, 1);
    if (boxa && scalefactor > 1.0) {
        L_WARNING("setting scalefactor to 1.0\n", procName);
        scalefactor = 1.0;
    }
 
    ret = pixConvertToPdfDataSegmented(pixs, res, type, thresh, boxa, quality,
                                       scalefactor, title, &data, &nbytes);
    if (ret)
        return ERROR_INT("pdf generation failure", procName, 1);
 
    ret = l_binaryWrite(fileout, "w", data, nbytes);
    if (data) LEPT_FREE(data);
    return ret;
}
 
 
l_ok
convertToPdfDataSegmented(const char  *filein,
                          l_int32      res,
                          l_int32      type,
                          l_int32      thresh,
                          BOXA        *boxa,
                          l_int32      quality,
                          l_float32    scalefactor,
                          const char  *title,
                          l_uint8    **pdata,
                          size_t      *pnbytes)
{
l_int32  ret;
PIX     *pixs;
 
    PROCNAME("convertToPdfDataSegmented");
 
    if (!pdata)
        return ERROR_INT("&data not defined", procName, 1);
    *pdata = NULL;
    if (!pnbytes)
        return ERROR_INT("&nbytes not defined", procName, 1);
    *pnbytes = 0;
    if (!filein)
        return ERROR_INT("filein not defined", procName, 1);
    if (type != L_G4_ENCODE && type != L_JPEG_ENCODE &&
        type != L_FLATE_ENCODE)
        return ERROR_INT("invalid conversion type", procName, 1);
    if (boxa && scalefactor > 1.0) {
        L_WARNING("setting scalefactor to 1.0\n", procName);
        scalefactor = 1.0;
    }
 
    if ((pixs = pixRead(filein)) == NULL)
        return ERROR_INT("pixs not made", procName, 1);
 
    ret = pixConvertToPdfDataSegmented(pixs, res, type, thresh, boxa,
                                       quality, scalefactor,
                                       (title) ? title : filein,
                                       pdata, pnbytes);
    pixDestroy(&pixs);
    return ret;
}
 
 
l_ok
pixConvertToPdfDataSegmented(PIX         *pixs,
                             l_int32      res,
                             l_int32      type,
                             l_int32      thresh,
                             BOXA        *boxa,
                             l_int32      quality,
                             l_float32    scalefactor,
                             const char  *title,
                             l_uint8    **pdata,
                             size_t      *pnbytes)
{
l_int32      i, nbox, seq, bx, by, bw, bh, upscale;
l_float32    scale;
BOX         *box, *boxc, *box2;
PIX         *pix, *pixt1, *pixt2, *pixt3, *pixt4, *pixt5, *pixt6;
PIXCMAP     *cmap;
L_PDF_DATA  *lpd;
 
    PROCNAME("pixConvertToPdfDataSegmented");
 
    if (!pdata)
        return ERROR_INT("&data not defined", procName, 1);
    *pdata = NULL;
    if (!pnbytes)
        return ERROR_INT("&nbytes not defined", procName, 1);
    *pnbytes = 0;
    if (!pixs)
        return ERROR_INT("pixs not defined", procName, 1);
    if (type != L_G4_ENCODE && type != L_JPEG_ENCODE &&
        type != L_FLATE_ENCODE)
        return ERROR_INT("invalid conversion type", procName, 1);
    if (boxa && (scalefactor <= 0.0 || scalefactor > 1.0)) {
        L_WARNING("setting scalefactor to 1.0\n", procName);
        scalefactor = 1.0;
    }
 
        /* Adjust scalefactor so that the product with res gives an integer */
    if (res <= 0)
        res = DefaultInputRes;
    scale = (l_float32)((l_int32)(scalefactor * res + 0.5)) / (l_float32)res;
    cmap = pixGetColormap(pixs);
 
        /* Simple case: single image to be encoded */
    if (!boxa || boxaGetCount(boxa) == 0) {
        if (pixGetDepth(pixs) > 1 && type == L_G4_ENCODE) {
            if (cmap)
                pixt1 = pixRemoveColormap(pixs, REMOVE_CMAP_TO_GRAYSCALE);
            else
                pixt1 = pixConvertTo8(pixs, FALSE);
            pixt2 = pixScaleGray2xLIThresh(pixt1, thresh);
            pixConvertToPdfData(pixt2, type, quality, pdata, pnbytes,
                                0, 0, 2 * res, title, NULL, 0);
            pixDestroy(&pixt1);
            pixDestroy(&pixt2);
        } else {
            pixConvertToPdfData(pixs, type, quality, pdata, pnbytes,
                                0, 0, res, title, NULL, 0);
        }
        return 0;
    }
 
        /* Multiple images to be encoded.  If %type == L_G4_ENCODE,
         * jpeg encode a version of pixs that is blanked in the non-image
         * regions, and paint the scaled non-image part onto it through a mask.
         * Otherwise, we must put the non-image part down first and
         * then render all the image regions separately on top of it,
         * at their own resolution. */
    pixt1 = pixSetBlackOrWhiteBoxa(pixs, boxa, L_SET_WHITE);  /* non-image */
    nbox = boxaGetCount(boxa);
    if (type == L_G4_ENCODE) {
        pixt2 = pixCreateTemplate(pixs);  /* only image regions */
        pixSetBlackOrWhite(pixt2, L_SET_WHITE);
        for (i = 0; i < nbox; i++) {
             box = boxaGetBox(boxa, i, L_CLONE);
             pix = pixClipRectangle(pixs, box, &boxc);
             boxGetGeometry(boxc, &bx, &by, &bw, &bh);
             pixRasterop(pixt2, bx, by, bw, bh, PIX_SRC, pix, 0, 0);
             pixDestroy(&pix);
             boxDestroy(&box);
             boxDestroy(&boxc);
        }
        pixt3 = pixRemoveColormap(pixt2, REMOVE_CMAP_BASED_ON_SRC);
        if (pixGetDepth(pixt3) == 1)
            pixt4 = pixScaleToGray(pixt3, scale);
        else
            pixt4 = pixScale(pixt3, scale, scale);
        pixConvertToPdfData(pixt4, L_JPEG_ENCODE, quality, pdata, pnbytes,
                            0, 0, (l_int32)(scale * res), title,
                            &lpd, L_FIRST_IMAGE);
 
        if (pixGetDepth(pixt1) == 1) {
            pixt5 = pixClone(pixt1);
            upscale = 1;
        } else {
            pixt6 = pixConvertTo8(pixt1, 0);
            pixt5 = pixScaleGray2xLIThresh(pixt6, thresh);
            pixDestroy(&pixt6);
            upscale = 2;
        }
        pixConvertToPdfData(pixt5, L_G4_ENCODE, quality, pdata, pnbytes,
                            0, 0, upscale * res, title, &lpd, L_LAST_IMAGE);
        pixDestroy(&pixt2);
        pixDestroy(&pixt3);
        pixDestroy(&pixt4);
        pixDestroy(&pixt5);
    } else {
            /* Put the non-image part down first.  This is the full
               size of the page, so we can use it to find the page
               height in pixels, which is required for determining
               the LL corner of the image relative to the LL corner
               of the page. */
        pixConvertToPdfData(pixt1, type, quality, pdata, pnbytes, 0, 0,
                            res, title, &lpd, L_FIRST_IMAGE);
        for (i = 0; i < nbox; i++) {
            box = boxaGetBox(boxa, i, L_CLONE);
            pixt2 = pixClipRectangle(pixs, box, &boxc);
            pixt3 = pixRemoveColormap(pixt2, REMOVE_CMAP_BASED_ON_SRC);
            if (pixGetDepth(pixt3) == 1)
                pixt4 = pixScaleToGray(pixt3, scale);
            else
                pixt4 = pixScale(pixt3, scale, scale);
            box2 = boxTransform(boxc, 0, 0, scale, scale);
            boxGetGeometry(box2, &bx, &by, NULL, &bh);
            seq = (i == nbox - 1) ? L_LAST_IMAGE : L_NEXT_IMAGE;
            pixConvertToPdfData(pixt4, L_JPEG_ENCODE, quality, pdata, pnbytes,
                                bx, by, (l_int32)(scale * res), title,
                                &lpd, seq);
            pixDestroy(&pixt2);
            pixDestroy(&pixt3);
            pixDestroy(&pixt4);
            boxDestroy(&box);
            boxDestroy(&boxc);
            boxDestroy(&box2);
        }
    }
 
    pixDestroy(&pixt1);
    return 0;
}
 
 
/*---------------------------------------------------------------------*
 *                         Multi-page concatenation                    *
 *---------------------------------------------------------------------*/
l_ok
concatenatePdf(const char  *dirname,
               const char  *substr,
               const char  *fileout)
{
l_int32  ret;
SARRAY  *sa;
 
    PROCNAME("concatenatePdf");
 
    if (!dirname)
        return ERROR_INT("dirname not defined", procName, 1);
    if (!fileout)
        return ERROR_INT("fileout not defined", procName, 1);
 
    if ((sa = getSortedPathnamesInDirectory(dirname, substr, 0, 0)) == NULL)
        return ERROR_INT("sa not made", procName, 1);
    ret = saConcatenatePdf(sa, fileout);
    sarrayDestroy(&sa);
    return ret;
}
 
 
l_ok
saConcatenatePdf(SARRAY      *sa,
                 const char  *fileout)
{
l_uint8  *data;
l_int32   ret;
size_t    nbytes;
 
    PROCNAME("saConcatenatePdf");
 
    if (!sa)
        return ERROR_INT("sa not defined", procName, 1);
    if (!fileout)
        return ERROR_INT("fileout not defined", procName, 1);
 
    ret = saConcatenatePdfToData(sa, &data, &nbytes);
    if (ret)
        return ERROR_INT("pdf data not made", procName, 1);
    ret = l_binaryWrite(fileout, "w", data, nbytes);
    LEPT_FREE(data);
    return ret;
}
 
 
l_ok
ptraConcatenatePdf(L_PTRA      *pa,
                   const char  *fileout)
{
l_uint8  *data;
l_int32   ret;
size_t    nbytes;
 
    PROCNAME("ptraConcatenatePdf");
 
    if (!pa)
        return ERROR_INT("pa not defined", procName, 1);
    if (!fileout)
        return ERROR_INT("fileout not defined", procName, 1);
 
    ret = ptraConcatenatePdfToData(pa, NULL, &data, &nbytes);
    if (ret)
        return ERROR_INT("pdf data not made", procName, 1);
    ret = l_binaryWrite(fileout, "w", data, nbytes);
    LEPT_FREE(data);
    return ret;
}
 
 
l_ok
concatenatePdfToData(const char  *dirname,
                     const char  *substr,
                     l_uint8    **pdata,
                     size_t      *pnbytes)
{
l_int32  ret;
SARRAY  *sa;
 
    PROCNAME("concatenatePdfToData");
 
    if (!pdata)
        return ERROR_INT("&data not defined", procName, 1);
    *pdata = NULL;
    if (!pnbytes)
        return ERROR_INT("&nbytes not defined", procName, 1);
    *pnbytes = 0;
    if (!dirname)
        return ERROR_INT("dirname not defined", procName, 1);
 
    if ((sa = getSortedPathnamesInDirectory(dirname, substr, 0, 0)) == NULL)
        return ERROR_INT("sa not made", procName, 1);
    ret = saConcatenatePdfToData(sa, pdata, pnbytes);
    sarrayDestroy(&sa);
    return ret;
}
 
 
l_ok
saConcatenatePdfToData(SARRAY    *sa,
                       l_uint8  **pdata,
                       size_t    *pnbytes)
{
char     *fname;
l_int32   i, npages, ret;
L_BYTEA  *bas;
L_PTRA   *pa_data;  /* input pdf data for each page */
 
    PROCNAME("saConcatenatePdfToData");
 
    if (!pdata)
        return ERROR_INT("&data not defined", procName, 1);
    *pdata = NULL;
    if (!pnbytes)
        return ERROR_INT("&nbytes not defined", procName, 1);
    *pnbytes = 0;
    if (!sa)
        return ERROR_INT("sa not defined", procName, 1);
 
        /* Read the pdf files into memory */
    if ((npages = sarrayGetCount(sa)) == 0)
        return ERROR_INT("no filenames found", procName, 1);
    pa_data = ptraCreate(npages);
    for (i = 0; i < npages; i++) {
        fname = sarrayGetString(sa, i, L_NOCOPY);
        bas = l_byteaInitFromFile(fname);
        ptraAdd(pa_data, bas);
    }
 
    ret = ptraConcatenatePdfToData(pa_data, sa, pdata, pnbytes);
 
        /* Cleanup: some pages could have been removed */
    ptraGetActualCount(pa_data, &npages);
    for (i = 0; i < npages; i++) {
        bas = (L_BYTEA *)ptraRemove(pa_data, i, L_NO_COMPACTION);
        l_byteaDestroy(&bas);
    }
    ptraDestroy(&pa_data, FALSE, FALSE);
    return ret;
}
 
/* --------------------------------------------*/
#endif  /* USE_PDFIO */
/* --------------------------------------------*/