pdfapp.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 "allheaders.h"
 
 
/* --------------------------------------------*/
#if  USE_PDFIO   /* defined in environ.h */
 /* --------------------------------------------*/
 
/*---------------------------------------------------------------------*
 *              Compression of images for prog/compresspdf             *
 *---------------------------------------------------------------------*/
l_ok
compressFilesToPdf(SARRAY      *sa,
                   l_int32      onebit,
                   l_int32      savecolor,
                   l_float32    scalefactor,
                   l_int32      quality,
                   const char  *title,
                   const char  *fileout)
{
char      *fname;
l_int32    n, i, res;
l_int32    maxsmallset = 25;  /* max num images kept uncompressed in array */
l_float32  colorfract;
PIX       *pixs, *pix1, *pix2;
PIXA      *pixa1 = NULL;
PIXAC     *pixac1 = NULL;
 
    if (!sa)
        return ERROR_INT("sa not defined", __func__, 1);
    if (!fileout)
        return ERROR_INT("fileout not defined", __func__, 1);
    if (scalefactor <= 0) scalefactor = 1.0;
    if (quality <= 0) quality = 50;  /* default value */
    if (quality < 25) {
        L_WARNING("quality %d too low; setting to 25\n", __func__, quality);
        quality = 25;
    }
    if (quality > 95) {
        L_WARNING("quality %d too high; setting to 95\n", __func__, quality);
        quality = 95;
    }
    if ((n = sarrayGetCount(sa)) == 0)
        return ERROR_INT("sa is empty", __func__, 1);
 
    if (n <= maxsmallset)
        pixa1 = pixaCreate(n);
    else
        pixac1 = pixacompCreate(n);
    for (i = 0; i < n; i++) {
        if (i == 0)
            lept_stderr("page: ");
        else if (i % 10 == 0)
            lept_stderr("%d . ", i);
        fname = sarrayGetString(sa, i, L_NOCOPY);
        pixs = pixRead(fname);
        if (onebit) {
            if (savecolor) {
                pixColorFraction(pixs, 40, 224, 80, 4, NULL, &colorfract);
                if (colorfract > 0.01)  /* save the color; DCT encoding */
                    pix1 = pixClone(pixs);
                else
                    pix1 = pixConvertTo1(pixs, 180);
            } else {  /* do not save any color; tiffg4 encoding */
                pix1 = pixConvertTo1(pixs, 180);
            }
        } else {  /* default encoding: tiffg4 for 1 bpp; DCT for all else */
            pix1 = pixClone(pixs);
        }
        if (scalefactor == 1.0)
            pix2 = pixClone(pix1);
        else
            pix2 = pixScale(pix1, scalefactor, scalefactor);
        if (n <= maxsmallset) {
            pixaAddPix(pixa1, pix2, L_INSERT);
        } else {
            pixacompAddPix(pixac1, pix2, IFF_DEFAULT);
            pixDestroy(&pix2);
        }
        pixDestroy(&pixs);
        pixDestroy(&pix1);
    }
 
        /* Generate the pdf.  Compute the actual input resolution from
         * the pixel dimensions of the first image.  This will cause each
         * page to be printed to cover an 8.5 x 11 inch sheet of paper. */
    lept_stderr("\nWrite output to %s\n", fileout);
    if (n <= maxsmallset)
        pix1 = pixaGetPix(pixa1, 0, L_CLONE);
    else
        pix1 = pixacompGetPix(pixac1, 0);
    pixInferResolution(pix1, 11.0, &res);
    pixDestroy(&pix1);
    if (strcmp(title, "none") == 0)
        title = NULL;
    if (n <= maxsmallset) {
        pixaConvertToPdf(pixa1, res, 1.0, L_DEFAULT_ENCODE, quality,
                         title, fileout);
        pixaDestroy(&pixa1);
    } else {
        pixacompConvertToPdf(pixac1, res, 1.0, L_DEFAULT_ENCODE, quality,
                             title, fileout);
        pixacompDestroy(&pixac1);
    }
    return 0;
}
 
 
/*---------------------------------------------------------------------*
 *                       Crop images for prog/croppdf                  *
 *---------------------------------------------------------------------*/
l_ok
cropFilesToPdf(SARRAY      *sa,
               l_int32      lr_clear,
               l_int32      tb_clear,
               l_int32      edgeclean,
               l_int32      lr_add,
               l_int32      tb_add,
               l_float32    maxwiden,
               const char  *title,
               const char  *fileout)
{
char      *fname;
l_int32    n, i, res;
l_int32    maxsmallset = 200;  /* max num images kept uncompressed in array */
PIX       *pixs, *pix1;
PIXA      *pixa1 = NULL;
PIXAC     *pixac1 = NULL;
 
    if (!sa)
        return ERROR_INT("sa not defined", __func__, 1);
    if (!fileout)
        return ERROR_INT("fileout not defined", __func__, 1);
    if ((n = sarrayGetCount(sa)) == 0)
        return ERROR_INT("sa is empty", __func__, 1);
 
    if (n <= maxsmallset)
        pixa1 = pixaCreate(n);
    else
        pixac1 = pixacompCreate(n);
    for (i = 0; i < n; i++) {
        if (i == 0)
            lept_stderr("page: ");
        else if (i % 10 == 0)
            lept_stderr("%d . ", i);
        fname = sarrayGetString(sa, i, L_NOCOPY);
        pixs = pixRead(fname);
        pix1 = pixCropImage(pixs, lr_clear, tb_clear, edgeclean,
                            lr_add, tb_add, maxwiden, NULL, NULL);
        if (n <= maxsmallset)
            pixaAddPix(pixa1, pix1, L_INSERT);
        else
            pixacompAddPix(pixac1, pix1, IFF_TIFF_G4);
        pixDestroy(&pixs);
    }
 
        /* Generate the pdf.  Compute the actual input resolution from
         * the pixel dimensions of the first image.  This will cause each
         * page to be printed to cover an 8.5 x 11 inch sheet of paper. */
    lept_stderr("\nWrite output to %s\n", fileout);
    if (n <= maxsmallset)
        pix1 = pixaGetPix(pixa1, 0, L_CLONE);
    else
        pix1 = pixacompGetPix(pixac1, 0);
    pixInferResolution(pix1, 11.0, &res);
    pixDestroy(&pix1);
    if (strcmp(title, "none") == 0)
        title = NULL;
    if (n <= maxsmallset) {
        pixaConvertToPdf(pixa1, res, 1.0, L_G4_ENCODE, 0, title, fileout);
        pixaDestroy(&pixa1);
    } else {
        pixacompConvertToPdf(pixac1, res, 1.0, L_G4_ENCODE, 0, title, fileout);
        pixacompDestroy(&pixac1);
    }
    return 0;
}
 
 
/*---------------------------------------------------------------------*
 *        Cleanup and binarization of images for prog/cleanpdf         *
 *---------------------------------------------------------------------*/
l_ok
cleanTo1bppFilesToPdf(SARRAY      *sa,
                      l_int32      res,
                      l_int32      contrast,
                      l_int32      rotation,
                      l_int32      opensize,
                      const char  *title,
                      const char  *fileout)
{
char      *fname;
l_int32    n, i, scale;
l_int32    maxsmallset = 200;  /* max num images kept uncompressed in array */
PIX       *pixs, *pix1;
PIXA      *pixa1 = NULL;
PIXAC     *pixac1 = NULL;
 
    if (!sa)
        return ERROR_INT("sa not defined", __func__, 1);
    if (!fileout)
        return ERROR_INT("fileout not defined", __func__, 1);
    if (res == 0) res = 300;
    if (res != 300 && res != 600) {
        L_ERROR("invalid res = %d; res must be in {0, 300, 600}\n",
                __func__, res);
        return 1;
    }
    if (contrast < 1 || contrast > 10) {
        L_ERROR("invalid contrast = %d; contrast must be in [1...10]\n",
                __func__, contrast);
        return 1;
    }
    if (rotation < 0 || rotation > 3) {
        L_ERROR("invalid rotation = %d; rotation must be in  {0,1,2,3}\n",
                __func__, rotation);
        return 1;
    }
    if (opensize > 3) {
        L_ERROR("invalid opensize = %d; opensize must be <= 3\n",
                __func__, opensize);
        return 1;
    }
    scale = (res == 300) ? 1 : 2;
    if ((n = sarrayGetCount(sa)) == 0)
        return ERROR_INT("sa is empty", __func__, 1);
 
    if (n <= maxsmallset)
        pixa1 = pixaCreate(n);
    else
        pixac1 = pixacompCreate(n);
    for (i = 0; i < n; i++) {
        if (i == 0)
            lept_stderr("page: ");
        else if (i % 10 == 0)
            lept_stderr("%d . ", i);
        fname = sarrayGetString(sa, i, L_NOCOPY);
        if ((pixs = pixRead(fname)) == NULL) {
            L_ERROR("pixs not read from %s\n", __func__, fname);
            continue;
        }
 
        pix1 = pixCleanImage(pixs, contrast, rotation, scale, opensize);
        if (n <= maxsmallset) {
            pixaAddPix(pixa1, pix1, L_INSERT);
        } else {
            pixacompAddPix(pixac1, pix1, IFF_TIFF_G4);
            pixDestroy(&pix1);
        }
        pixDestroy(&pixs);
    }
 
        /* Generate the pdf.  Compute the actual input resolution from
         * the pixel dimensions of the first image.  This will cause each
         * page to be printed to cover an 8.5 x 11 inch sheet of paper. */
    lept_stderr("Write output to %s\n", fileout);
    if (n <= maxsmallset)
        pix1 = pixaGetPix(pixa1, 0, L_CLONE);
    else
        pix1 = pixacompGetPix(pixac1, 0);
    pixInferResolution(pix1, 11.0, &res);
    pixDestroy(&pix1);
    if (strcmp(title, "none") == 0)
        title = NULL;
 
    if (n <= maxsmallset) {
        pixaConvertToPdf(pixa1, res, 1.0, L_G4_ENCODE, 0, title, fileout);
        pixaDestroy(&pixa1);
    } else {
        pixacompConvertToPdf(pixac1, res, 1.0, L_G4_ENCODE, 0, title, fileout);
        pixacompDestroy(&pixac1);
    }
    return 0;
}
 
/* --------------------------------------------*/
#endif  /* USE_PDFIO */
/* --------------------------------------------*/