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author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2013-01-27 01:03:37 -0600 |
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committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2013-01-27 01:03:37 -0600 |
commit | 2e25fa39cd67cca2472d3eabdb478feb517d72a5 (patch) | |
tree | 63725962f632d152cbf20709191d39f6fc865966 /kfile-plugins/ps/gscreator.cpp | |
parent | 190d88dfc662f3fc466c9d1f53acbbea65f33c49 (diff) | |
download | tdegraphics-2e25fa39cd67cca2472d3eabdb478feb517d72a5.tar.gz tdegraphics-2e25fa39cd67cca2472d3eabdb478feb517d72a5.zip |
Rename a number of libraries and executables to avoid conflicts with KDE4
Diffstat (limited to 'kfile-plugins/ps/gscreator.cpp')
-rw-r--r-- | kfile-plugins/ps/gscreator.cpp | 619 |
1 files changed, 0 insertions, 619 deletions
diff --git a/kfile-plugins/ps/gscreator.cpp b/kfile-plugins/ps/gscreator.cpp deleted file mode 100644 index c664947b..00000000 --- a/kfile-plugins/ps/gscreator.cpp +++ /dev/null @@ -1,619 +0,0 @@ -/* This file is part of the KDE libraries - Copyright (C) 2001 Malte Starostik <malte@kde.org> - - Handling of EPS previews Copyright (C) 2003 Philipp Hullmann <phull@gmx.de> - - 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. -*/ - -/* This function gets a path of a DVI, EPS, PS or PDF file and - produces a PNG-Thumbnail which is stored as a TQImage - - The program works as follows - - 1. Test if file is a DVI file - - 2. Create a child process (1), in which the - file is to be changed into a PNG - - 3. Child-process (1) : - - 4. If file is DVI continue with 6 - - 5. If file is no DVI continue with 9 - - 6. Create another child process (2), in which the DVI is - turned into PS using dvips - - 7. Parent process (2) : - Turn the recently created PS file into a PNG file using gs - - 8. continue with 10 - - 9. Turn the PS,PDF or EPS file into a PNG file using gs - - 10. Parent process (1) - store data in a TQImage -*/ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - - -#include <assert.h> -#include <ctype.h> -#include <stdlib.h> -#include <stdio.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 <kdemacros.h> - -#include <tqcolor.h> -#include <tqfile.h> -#include <tqimage.h> -#include <tqregexp.h> - - -#include "gscreator.h" -#include "dscparse_adapter.h" -#include "dscparse.h" - -extern "C" -{ - KDE_EXPORT ThumbCreator *new_creator() - { - return new GSCreator; - } -} - -// This PS snippet will be prepended to the actual file so that only -// the first page is output. -static const char *psprolog = - "%!PS-Adobe-3.0\n" - "/.showpage.orig /showpage load def\n" - "/.showpage.firstonly {\n" - " .showpage.orig\n" - " quit\n" - "} def\n" - "/showpage { .showpage.firstonly } def\n"; - -// This is the code recommended by Adobe tech note 5002 for including -// EPS files. -static const char *epsprolog = - "%!PS-Adobe-3.0\n" - "userdict begin /pagelevel save def /showpage { } def\n" - "0 setgray 0 setlinecap 1 setlinewidth 0 setlinejoin 10 setmiterlimit\n" - "[ ] 0 setdash newpath false setoverprint false setstrokeadjust\n"; - -static const char * gsargs_ps[] = { - "gs", - "-sDEVICE=png16m", - "-sOutputFile=-", - "-dSAFER", - "-dPARANOIDSAFER", - "-dNOPAUSE", - "-dFirstPage=1", - "-dLastPage=1", - "-q", - "-", - 0, // file name - "-c", - "showpage", - "-c", - "quit", - 0 -}; - -static const char * gsargs_eps[] = { - "gs", - "-sDEVICE=png16m", - "-sOutputFile=-", - "-dSAFER", - "-dPARANOIDSAFER", - "-dNOPAUSE", - 0, // page size - 0, // resolution - "-q", - "-", - 0, // file name - "-c", - "pagelevel", - "-c", - "restore", - "-c", - "end", - "-c", - "showpage", - "-c", - "quit", - 0 -}; - -static const char *dvipsargs[] = { - "dvips", - "-n", - "1", - "-q", - "-o", - "-", - 0, // file name - 0 -}; - -static bool correctDVI(const TQString& filename); - - -namespace { - bool got_sig_term = false; - void handle_sigterm( int ) { - got_sig_term = true; - } -} - - -bool GSCreator::create(const TQString &path, int width, int height, TQImage &img) -{ -// The code in the loop (when testing whether got_sig_term got set) -// should read some variation of: -// parentJob()->wasKilled() -// -// Unfortunatelly, that's currently impossible without breaking BIC. -// So we need to catch the signal ourselves. -// Otherwise, on certain funny PS files (for example -// http://www.tjhsst.edu/~Eedanaher/pslife/life.ps ) -// gs would run forever after we were dead. -// #### Reconsider for KDE 4 ### -// (24/12/03 - luis_pedro) -// - typedef void ( *sighandler_t )( int ); - // according to linux's "man signal" the above typedef is a gnu extension - sighandler_t oldhandler = signal( SIGTERM, handle_sigterm ); - - int input[2]; - int output[2]; - int dvipipe[2]; - - TQByteArray data(1024); - - bool ok = false; - - // Test if file is DVI - bool no_dvi =!correctDVI(path); - - if (pipe(input) == -1) { - return false; - } - if (pipe(output) == -1) { - close(input[0]); - close(input[1]); - return false; - } - - KDSC dsc; - endComments = false; - dsc.setCommentHandler(this); - - if (no_dvi) - { - FILE* fp = fopen(TQFile::encodeName(path), "r"); - if (fp == 0) return false; - - char buf[4096]; - int count; - while ((count = fread(buf, sizeof(char), 4096, fp)) != 0 - && !endComments) { - dsc.scanData(buf, count); - } - fclose(fp); - - if (dsc.pjl() || dsc.ctrld()) { - // this file is a mess. - return false; - } - } - - const bool is_encapsulated = no_dvi && - (path.find(TQRegExp("\\.epsi?$", false, false)) > 0) && - (dsc.bbox()->width() > 0) && (dsc.bbox()->height() > 0) && - (dsc.page_count() <= 1); - - char translation[64] = ""; - char pagesize[32] = ""; - char resopt[32] = ""; - std::auto_ptr<KDSCBBOX> bbox = dsc.bbox(); - if (is_encapsulated) { - // GhostScript's rendering at the extremely low resolutions - // required for thumbnails leaves something to be desired. To - // get nicer images, we render to four times the required - // resolution and let TQImage scale the result. - const int hres = (width * 72) / bbox->width(); - const int vres = (height * 72) / bbox->height(); - const int resolution = (hres > vres ? vres : hres) * 4; - const int gswidth = ((bbox->urx() - bbox->llx()) * resolution) / 72; - const int gsheight = ((bbox->ury() - bbox->lly()) * resolution) / 72; - - snprintf(pagesize, 31, "-g%ix%i", gswidth, gsheight); - snprintf(resopt, 31, "-r%i", resolution); - snprintf(translation, 63, - " 0 %i sub 0 %i sub translate\n", bbox->llx(), - bbox->lly()); - } - - const CDSC_PREVIEW_TYPE previewType = - static_cast<CDSC_PREVIEW_TYPE>(dsc.preview()); - - switch (previewType) { - case CDSC_TIFF: - case CDSC_WMF: - case CDSC_PICT: - // FIXME: these should take precedence, since they can hold - // color previews, which EPSI can't (or can it?). - break; - case CDSC_EPSI: - { - const int xscale = bbox->width() / width; - const int yscale = bbox->height() / height; - const int scale = xscale < yscale ? xscale : yscale; - if (getEPSIPreview(path, - dsc.beginpreview(), - dsc.endpreview(), - img, - bbox->width() / scale, - bbox->height() / scale)) - return true; - // If the preview extraction routine fails, gs is used to - // create a thumbnail. - } - break; - case CDSC_NOPREVIEW: - default: - // need to run ghostscript in these cases - break; - } - - pid_t pid = fork(); - if (pid == 0) { - // Child process (1) - - // close(STDERR_FILENO); - - // find first zero entry in gsargs and put the filename - // or - (stdin) there, if DVI - const char **gsargs = gsargs_ps; - const char **arg = gsargs; - - if (no_dvi && is_encapsulated) { - gsargs = gsargs_eps; - arg = gsargs; - - // find first zero entry and put page size there - while (*arg) ++arg; - *arg = pagesize; - - // find second zero entry and put resolution there - while (*arg) ++arg; - *arg = resopt; - } - - // find next zero entry and put the filename there - TQCString fname = TQFile::encodeName( path ); - while (*arg) - ++arg; - if( no_dvi ) - *arg = fname.data(); - else - *arg = "-"; - - // find first zero entry in dvipsargs and put the filename there - arg = dvipsargs; - while (*arg) - ++arg; - *arg = fname.data(); - - if( !no_dvi ){ - pipe(dvipipe); - pid_t pid_two = fork(); - if( pid_two == 0 ){ - // Child process (2), reopen stdout on the pipe "dvipipe" and exec dvips - - close(input[0]); - close(input[1]); - close(output[0]); - close(output[1]); - close(dvipipe[0]); - - dup2( dvipipe[1], STDOUT_FILENO); - - execvp(dvipsargs[0], const_cast<char *const *>(dvipsargs)); - exit(1); - } - else if(pid_two != -1){ - close(input[1]); - close(output[0]); - close(dvipipe[1]); - - dup2( dvipipe[0], STDIN_FILENO); - dup2( output[1], STDOUT_FILENO); - - execvp(gsargs[0], const_cast<char *const *>(gsargs)); - exit(1); - } - else{ - // fork() (2) failed, close these - close(dvipipe[0]); - close(dvipipe[1]); - } - - } - else if( no_dvi ){ - // Reopen stdin/stdout on the pipes and exec gs - close(input[1]); - close(output[0]); - - dup2(input[0], STDIN_FILENO); - dup2(output[1], STDOUT_FILENO); - - execvp(gsargs[0], const_cast<char *const *>(gsargs)); - exit(1); - } - } - else if (pid != -1) { - // Parent process, write first-page-only-hack (the hack is not - // used if DVI) and read the png output - close(input[0]); - close(output[1]); - const char *prolog; - if (is_encapsulated) - prolog = epsprolog; - else - prolog = psprolog; - int count = write(input[1], prolog, strlen(prolog)); - if (is_encapsulated) - write(input[1], translation, strlen(translation)); - - close(input[1]); - if (count == static_cast<int>(strlen(prolog))) { - 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; - - got_sig_term = false; - if (select(output[0] + 1, &fds, 0, 0, &tv) <= 0) { - if ( ( errno == EINTR || errno == EAGAIN ) && !got_sig_term ) continue; - break; // error, timeout or master wants us to quit (SIGTERM) - } - if (FD_ISSET(output[0], &fds)) { - count = read(output[0], data.data() + offset, 1024); - if (count == -1) - break; - else - if (count) // prepare for next block - { - offset += count; - data.resize(offset + 1024); - } - else // got all data - { - data.resize(offset); - ok = true; - } - } - } - } - if (!ok) // error or timeout, gs probably didn't exit yet - { - kill(pid, SIGTERM); - } - - int status = 0; - if (waitpid(pid, &status, 0) != pid || (status != 0 && status != 256) ) - ok = false; - } - else { - // fork() (1) failed, close these - close(input[0]); - close(input[1]); - close(output[1]); - } - close(output[0]); - - int l = img.loadFromData( data ); - - if ( got_sig_term && - oldhandler != SIG_ERR && - oldhandler != SIG_DFL && - oldhandler != SIG_IGN ) { - oldhandler( SIGTERM ); // propagate the signal. Other things might rely on it - } - if ( oldhandler != SIG_ERR ) signal( SIGTERM, oldhandler ); - - return ok && l; -} - -ThumbCreator::Flags GSCreator::flags() const -{ - return static_cast<Flags>(DrawFrame); -} - -void GSCreator::comment(Name name) -{ - switch (name) { - case EndPreview: - case BeginProlog: - case Page: - endComments = true; - break; - - default: - break; - } -} - -// Quick function to check if the filename corresponds to a valid DVI -// file. Returns true if <filename> is a DVI file, false otherwise. - -static bool correctDVI(const TQString& filename) -{ - TQFile f(filename); - if (!f.open(IO_ReadOnly)) - return FALSE; - - unsigned char test[4]; - if ( f.readBlock( (char *)test,2)<2 || test[0] != 247 || test[1] != 2 ) - return FALSE; - - int n = f.size(); - if ( n < 134 ) // Too short for a dvi file - return FALSE; - f.at( n-4 ); - - unsigned char trailer[4] = { 0xdf,0xdf,0xdf,0xdf }; - - if ( f.readBlock( (char *)test, 4 )<4 || strncmp( (char *)test, (char*) trailer, 4 ) ) - return FALSE; - // We suppose now that the dvi file is complete and OK - return TRUE; -} - -bool GSCreator::getEPSIPreview(const TQString &path, long start, long - end, TQImage &outimg, int imgwidth, int imgheight) -{ - FILE *fp; - fp = fopen(TQFile::encodeName(path), "r"); - if (fp == 0) return false; - - const long previewsize = end - start + 1; - - char *buf = (char *) malloc(previewsize); - fseek(fp, start, SEEK_SET); - int count = fread(buf, sizeof(char), previewsize - 1, fp); - fclose(fp); - buf[previewsize - 1] = 0; - if (count != previewsize - 1) - { - free(buf); - return false; - } - - TQString previewstr = TQString::fromLatin1(buf); - free(buf); - - int offset = 0; - while ((offset < previewsize) && !(previewstr[offset].isDigit())) offset++; - int digits = 0; - while ((offset + digits < previewsize) && previewstr[offset + digits].isDigit()) digits++; - int width = previewstr.mid(offset, digits).toInt(); - offset += digits + 1; - while ((offset < previewsize) && !(previewstr[offset].isDigit())) offset++; - digits = 0; - while ((offset + digits < previewsize) && previewstr[offset + digits].isDigit()) digits++; - int height = previewstr.mid(offset, digits).toInt(); - offset += digits + 1; - while ((offset < previewsize) && !(previewstr[offset].isDigit())) offset++; - digits = 0; - while ((offset + digits < previewsize) && previewstr[offset + digits].isDigit()) digits++; - int depth = previewstr.mid(offset, digits).toInt(); - - // skip over the rest of the BeginPreview comment - while ((offset < previewsize) && - previewstr[offset] != '\n' && - previewstr[offset] != '\r') offset++; - while ((offset < previewsize) && previewstr[offset] != '%') offset++; - - unsigned int imagedepth; - switch (depth) { - case 1: - case 2: - case 4: - case 8: - imagedepth = 8; - break; - case 12: // valid, but not (yet) supported - default: // illegal value - return false; - } - - unsigned int colors = (1U << depth); - TQImage img(width, height, imagedepth, colors); - img.setAlphaBuffer(false); - - if (imagedepth <= 8) { - for (unsigned int gray = 0; gray < colors; gray++) { - unsigned int grayvalue = (255U * (colors - 1 - gray)) / - (colors - 1); - img.setColor(gray, tqRgb(grayvalue, grayvalue, grayvalue)); - } - } - - const unsigned int bits_per_scan_line = width * depth; - unsigned int bytes_per_scan_line = bits_per_scan_line / 8; - if (bits_per_scan_line % 8) bytes_per_scan_line++; - const unsigned int bindatabytes = height * bytes_per_scan_line; - TQMemArray<unsigned char> bindata(bindatabytes); - - for (unsigned int i = 0; i < bindatabytes; i++) { - if (offset >= previewsize) - return false; - - while (!isxdigit(previewstr[offset].latin1()) && - offset < previewsize) - offset++; - - bool ok = false; - bindata[i] = static_cast<unsigned char>(previewstr.mid(offset, 2).toUInt(&ok, 16)); - if (!ok) - return false; - - offset += 2; - } - - for (int scanline = 0; scanline < height; scanline++) { - unsigned char *scanlineptr = img.scanLine(scanline); - - for (int pixelindex = 0; pixelindex < width; pixelindex++) { - unsigned char pixelvalue = 0; - const unsigned int bitoffset = - scanline * bytes_per_scan_line * 8U + pixelindex * depth; - for (int depthindex = 0; depthindex < depth; - depthindex++) { - const unsigned int byteindex = (bitoffset + depthindex) / 8U; - const unsigned int bitindex = - 7 - ((bitoffset + depthindex) % 8U); - const unsigned char bitvalue = - (bindata[byteindex] & static_cast<unsigned char>(1U << bitindex)) >> bitindex; - pixelvalue |= (bitvalue << depthindex); - } - scanlineptr[pixelindex] = pixelvalue; - } - } - - outimg = img.convertDepth(32).smoothScale(imgwidth, imgheight); - - return true; -} |