source/libs/poppler/poppler-src/goo/NetPBMWriter.cc

   1 //========================================================================
   2 //
   3 // NetPBMWriter.h
   4 //
   5 // Copyright 1998-2003 Glyph & Cog, LLC
   6 //
   7 //========================================================================
   8 //
   9 //========================================================================
  10 //
  11 // Modified under the Poppler project - http://poppler.freedesktop.org
  12 //
  13 // All changes made under the Poppler project to this file are licensed
  14 // under GPL version 2 or later
  15 //
  16 // Copyright (C) 2005, 2007, 2011 Albert Astals Cid <aacid@kde.org>
  17 // Copyright (C) 2006 Rainer Keller <class321@gmx.de>
  18 // Copyright (C) 2008 Timothy Lee <timothy.lee@siriushk.com>
  19 // Copyright (C) 2008 Vasile Gaburici <gaburici@cs.umd.edu>
  20 // Copyright (C) 2009 Carlos Garcia Campos <carlosgc@gnome.org>
  21 // Copyright (C) 2009 William Bader <williambader@hotmail.com>
  22 // Copyright (C) 2010 Jakob Voss <jakob.voss@gbv.de>
  23 // Copyright (C) 2012, 2013 Adrian Johnson <ajohnson@redneon.com>
  24 // Copyright (C) 2013 Thomas Fischer <fischer@unix-ag.uni-kl.de>
  25 //
  26 // To see a description of the changes please see the Changelog file that
  27 // came with your tarball or type make ChangeLog if you are building from git
  28 //
  29 //========================================================================
  30
  31 #include "poppler-config.h"
  32
  33 #include "NetPBMWriter.h"
  34
  35 // Writer for the NetPBM formats (PBM and PPM)
  36 // This format is documented at:
  37 //   http://netpbm.sourceforge.net/doc/pbm.html
  38 //   http://netpbm.sourceforge.net/doc/ppm.html
  39
  40 NetPBMWriter::NetPBMWriter(Format formatA) : format(formatA)
  41 {
  42 }
  43
  44 bool NetPBMWriter::init(FILE *f, int widthA, int heightA, int hDPI, int vDPI)
  45 {
  46   file = f;
  47   width = widthA;
  48   if (format == MONOCHROME) {
  49     fprintf(file, "P4\n");
  50     fprintf(file, "%d %d\n", widthA, heightA);
  51   } else {
  52     fprintf(file, "P6\n");
  53     fprintf(file, "%d %d\n", widthA, heightA);
  54     fprintf(file, "255\n");
  55   }
  56   return true;
  57 }
  58
  59 bool NetPBMWriter::writePointers(unsigned char **rowPointers, int rowCount)
  60 {
  61   for (int i = 0; i < rowCount; i++)
  62     writeRow(&rowPointers[i]);
  63   return true;
  64 }
  65
  66 bool NetPBMWriter::writeRow(unsigned char **row)
  67 {
  68   if (format == MONOCHROME) {
  69     // PBM uses 0 = white, 1 = black so we need to invert the colors
  70     int size = (width + 7)/8;
  71     for (int i = 0; i < size; i++)
  72       fputc((*row)[i] ^ 0xff, file);
  73   } else {
  74     fwrite(*row, 1, width*3, file);
  75   }
  76   return true;
  77 }
  78
  79
  80 bool NetPBMWriter::close()
  81 {
  82   return true;
  83 }
  84