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/*
* Copyright (C) 2010, Pino Toscano <[email protected]>
* Copyright (C) 2017, 2019, Albert Astals Cid <[email protected]>
*
* 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, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <poppler-document.h>
#include <poppler-image.h>
#include <poppler-page.h>
#include <poppler-page-renderer.h>
#include <cstdlib>
#include <iostream>
#include <memory>
#include "parseargs.h"
bool show_help = false;
bool show_formats = false;
char out_filename[4096];
int doc_page = 0;
static const ArgDesc the_args[] = { { "-f", argFlag, &show_formats, 0, "show supported output image formats" },
{ "--page", argInt, &doc_page, 0, "select page to render" },
{ "-o", argString, &out_filename, sizeof(out_filename), "output filename for the resulting PNG image" },
{ "-h", argFlag, &show_help, 0, "print usage information" },
{ "--help", argFlag, &show_help, 0, "print usage information" },
{ nullptr, argFlag, nullptr, 0, nullptr } };
static void error(const std::string &msg)
{
std::cerr << "Error: " << msg << std::endl;
std::cerr << "Exiting..." << std::endl;
exit(1);
}
int main(int argc, char *argv[])
{
if (!parseArgs(the_args, &argc, argv) || (argc < 2 && !show_formats) || show_help) {
printUsage(argv[0], "DOCUMENT", the_args);
exit(1);
}
if (show_formats) {
const std::vector<std::string> formats = poppler::image::supported_image_formats();
std::cout << "Supported image formats:" << std::endl;
for (const std::string &format : formats) {
std::cout << " " << format << std::endl;
}
exit(0);
}
if (!out_filename[0]) {
error("missing output filename (-o)");
}
if (!poppler::page_renderer::can_render()) {
error("renderer compiled without Splash support");
}
const std::string file_name(argv[1]);
std::unique_ptr<poppler::document> doc(poppler::document::load_from_file(file_name));
if (!doc.get()) {
error("loading error");
}
if (doc->is_locked()) {
error("encrypted document");
}
if (doc_page < 0 || doc_page >= doc->pages()) {
error("specified page number out of page count");
}
std::unique_ptr<poppler::page> p(doc->create_page(doc_page));
if (!p.get()) {
error("NULL page");
}
poppler::page_renderer pr;
pr.set_render_hint(poppler::page_renderer::antialiasing, true);
pr.set_render_hint(poppler::page_renderer::text_antialiasing, true);
poppler::image img = pr.render_page(p.get());
if (!img.is_valid()) {
error("rendering failed");
}
if (!img.save(out_filename, "png")) {
error("saving to file failed");
}
return 0;
}
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