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/*
* Copyright (c) 2008 Valentin Ziegler <valentin@exactcode.de>
* Copyright (c) 2008 Susanne Klaus <susanne@exactcode.de>
* Copyright (c) 2009 Rene Rebe <rene@exactcode.de>
*
* 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; version 2. A copy of the GNU General
* Public License can be found in the file LICENSE.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANT-
* ABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* Alternatively, commercial licensing options are available from the
* copyright holder ExactCODE GmbH Germany.
*/
#include "ps.hh"
#include "Encodings.hh"
#if WITHLIBJPEG == 1
#include "jpeg.hh"
#endif
int PSCodec::readImage (std::istream* stream, Image& image, const std::string& decompress)
{
return false;
}
bool PSCodec::writeImage (std::ostream* stream, Image& image, int quality,
const std::string& compress)
{
const int w = image.w;
const int h = image.h;
// TODO: yres might be different
double dpi = image.resolutionX() ? image.resolutionY() : 72;
double scale = 72 / dpi; //postscript native resolution is 72dpi.
const char* creatorName = "ExactImage";
*stream <<
"%!PS-Adobe-3.0\n"
"%%Creator:" << creatorName << "\n"
"%%DocumentData: Clean7Bit\n"
"%%LanguageLevel: 2\n"
"%%BoundingBox: 0 0 " << scale*(double)w << " " << scale*(double)h << "\n"
"%%EndComments\n"
"%%BeginProlog\n"
"0 dict begin\n"
"%%EndProlog\n"
"%%BeginPage\n"
<< std::endl;
encodeImage (stream, image, scale, quality, compress);
*stream << "%%EndPage\nshowpage\nend" << std::endl;
return true;
}
void PSCodec::encodeImage (std::ostream* stream, Image& image, double scale,
int quality, const std::string& compress)
{
const int w = image.w;
const int h = image.h;
std::string encoding = "ASCII85Decode";
if (!compress.empty())
{
std::string c (compress);
std::transform (c.begin(), c.end(), c.begin(), tolower);
if (c == "encodeascii85")
encoding = "ASCII85Decode";
else if (c == "encodehex")
encoding = "ASCIIHexDecode";
else if (c == "encodejpeg")
encoding = "DCTDecode";
else
std::cerr << "PDFCodec: Unrecognized encoding option '" << compress << "'" << std::endl;
}
const char* decodeName = "Decode [0 1 0 1 0 1]";
const char* deviceName = "DeviceRGB";
if (image.spp == 1) {
deviceName = "DeviceGray";
decodeName = "Decode [0 1]";
}
*stream <<
"/" << deviceName << " setcolorspace\n"
"<<\n"
" /ImageType 1\n"
" /Width " << w << " /Height " << h << "\n"
" /BitsPerComponent " << image.bps << "\n"
" /" << decodeName << "\n"
" /ImageMatrix [\n"
" " << 1.0 / scale << " 0.0\n"
" 0.0 " << -1.0 / scale << "\n"
" 0.0 " << h << "\n"
" ]\n"
" /DataSource currentfile /" << encoding << " filter\n"
">> image"
<< std::endl;
const int bytes = image.stride() * h;
uint8_t* data = image.getRawData();
if (encoding == "ASCII85Decode")
EncodeASCII85(*stream, data, bytes);
else if (encoding == "ASCIIHexDecode")
EncodeHex(*stream, data, bytes);
#if WITHLIBJPEG == 1
else {
JPEGCodec codec;
codec.writeImage (stream, image, quality, compress);
}
#endif
stream->put('\n');
}
PSCodec ps_loader;
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