/* This file is part of the KDE libraries Copyright (C) 2001 Malte Starostik <malte@kde.org> Copyright (C) 2001 Leon Bottou <leon@bottou.org> This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <assert.h> #include <stdlib.h> #include <unistd.h> #include <signal.h> #ifdef HAVE_SYS_SELECT_H #include <sys/select.h> #endif #include <sys/time.h> #include <sys/wait.h> #include <fcntl.h> #include <errno.h> #include <tqfile.h> #include <tqimage.h> #include <kdemacros.h> #include "djvucreator.h" extern "C" { KDE_EXPORT ThumbCreator *new_creator() { return new DjVuCreator; } } bool DjVuCreator::create(const TQString &path, int width, int height, TQImage &img) { int output[2]; TQByteArray data(1024); bool ok = false; if (pipe(output) == -1) return false; const char* argv[8]; TQCString sizearg, fnamearg; sizearg.sprintf("%dx%d", width, height); fnamearg = TQFile::encodeName( path ); argv[0] = "ddjvu"; argv[1] = "-page"; argv[2] = "1"; argv[3] = "-size"; argv[4] = sizearg.data(); argv[5] = fnamearg.data(); argv[6] = 0; pid_t pid = fork(); if (pid == 0) { close(output[0]); dup2(output[1], STDOUT_FILENO); execvp(argv[0], const_cast<char *const *>(argv)); exit(1); } else if (pid >= 0) { close(output[1]); int offset = 0; while (!ok) { fd_set fds; FD_ZERO(&fds); FD_SET(output[0], &fds); struct timeval tv; tv.tv_sec = 20; tv.tv_usec = 0; if (select(output[0] + 1, &fds, 0, 0, &tv) <= 0) { if (errno == EINTR || errno == EAGAIN) continue; break; // error or timeout } if (FD_ISSET(output[0], &fds)) { int count = read(output[0], data.data() + offset, 1024); if (count == -1) break; if (count) // prepare for next block { offset += count; data.resize(offset + 1024); } else // got all data { data.resize(offset); ok = true; } } } if (!ok) kill(pid, SIGTERM); int status = 0; if (waitpid(pid, &status, 0) != pid || (status != 0 && status != 256) ) ok = false; } else { close(output[1]); } close(output[0]); int l = img.loadFromData( data ); return ok && l; } ThumbCreator::Flags DjVuCreator::flags() const { return static_cast<Flags>(DrawFrame); }