mirror of
https://invent.kde.org/graphics/okular
synced 2024-11-05 18:34:53 +00:00
6623fcd4d8
Fix only in KDE > 4.5. BUG: 228551 svn path=/trunk/KDE/kdegraphics/okular/; revision=1107836
357 lines
11 KiB
C++
357 lines
11 KiB
C++
// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; c-brace-offset: 0; -*-
|
|
//
|
|
// ghostscript_interface
|
|
//
|
|
// Part of KDVI - A framework for multipage text/gfx viewers
|
|
//
|
|
// (C) 2004 Stefan Kebekus
|
|
// Distributed under the GPL
|
|
|
|
#include <config.h>
|
|
|
|
#include "psgs.h"
|
|
#include "psheader.cpp"
|
|
#include "dviFile.h"
|
|
#include "kvs_debug.h"
|
|
#include "pageNumber.h"
|
|
|
|
#include <klocale.h>
|
|
#include <kmessagebox.h>
|
|
#include <kprocess.h>
|
|
#include <ktemporaryfile.h>
|
|
#include <kurl.h>
|
|
|
|
#include <QDir>
|
|
#include <QPainter>
|
|
#include <QPixmap>
|
|
#include <QTextStream>
|
|
#include <QTimer>
|
|
|
|
//#define DEBUG_PSGS
|
|
|
|
//extern char psheader[];
|
|
|
|
pageInfo::pageInfo(const QString& _PostScriptString) {
|
|
PostScriptString = new QString(_PostScriptString);
|
|
background = Qt::white;
|
|
permanentBackground = Qt::white;
|
|
}
|
|
|
|
|
|
pageInfo::~pageInfo() {
|
|
if (PostScriptString != 0L)
|
|
delete PostScriptString;
|
|
}
|
|
|
|
|
|
// ======================================================
|
|
|
|
ghostscript_interface::ghostscript_interface() {
|
|
|
|
PostScriptHeaderString = new QString();
|
|
|
|
knownDevices.append("png16m");
|
|
knownDevices.append("jpeg");
|
|
knownDevices.append("pnn");
|
|
knownDevices.append("pnnraw");
|
|
gsDevice = knownDevices.begin();
|
|
}
|
|
|
|
ghostscript_interface::~ghostscript_interface() {
|
|
if (PostScriptHeaderString != 0L)
|
|
delete PostScriptHeaderString;
|
|
qDeleteAll(pageList);
|
|
}
|
|
|
|
|
|
void ghostscript_interface::setPostScript(const PageNumber& page, const QString& PostScript) {
|
|
#ifdef DEBUG_PSGS
|
|
kDebug(kvs::dvi) << "ghostscript_interface::setPostScript( " << page << ", ... )";
|
|
#endif
|
|
|
|
if (pageList.value(page) == 0) {
|
|
pageInfo *info = new pageInfo(PostScript);
|
|
// Check if dict is big enough
|
|
if (pageList.count() > pageList.capacity() -2)
|
|
pageList.reserve(pageList.capacity()*2);
|
|
pageList.insert(page, info);
|
|
} else
|
|
*(pageList.value(page)->PostScriptString) = PostScript;
|
|
}
|
|
|
|
|
|
void ghostscript_interface::setIncludePath(const QString &_includePath) {
|
|
if (_includePath.isEmpty())
|
|
includePath = "*"; // Allow all files
|
|
else
|
|
includePath = _includePath+"/*";
|
|
}
|
|
|
|
|
|
void ghostscript_interface::setBackgroundColor(const PageNumber& page, const QColor& background_color, bool permanent) {
|
|
#ifdef DEBUG_PSGS
|
|
kDebug(kvs::dvi) << "ghostscript_interface::setBackgroundColor( " << page << ", " << background_color << " )";
|
|
#endif
|
|
|
|
if (pageList.value(page) == 0) {
|
|
pageInfo *info = new pageInfo(QString::null); //krazy:exclude=nullstrassign for old broken gcc
|
|
info->background = background_color;
|
|
if (permanent)
|
|
info->permanentBackground = background_color;
|
|
// Check if dict is big enough
|
|
if (pageList.count() > pageList.capacity() -2)
|
|
pageList.reserve(pageList.capacity()*2);
|
|
pageList.insert(page, info);
|
|
} else {
|
|
pageList.value(page)->background = background_color;
|
|
if (permanent)
|
|
pageList.value(page)->permanentBackground = background_color;
|
|
}
|
|
}
|
|
|
|
void ghostscript_interface::restoreBackgroundColor(const PageNumber& page)
|
|
{
|
|
#ifdef DEBUG_PSGS
|
|
kDebug(kvs::dvi) << "ghostscript_interface::restoreBackgroundColor( " << page << " )";
|
|
#endif
|
|
if (pageList.value(page) == 0)
|
|
return;
|
|
|
|
pageInfo *info = pageList.value(page);
|
|
info->background = info->permanentBackground;
|
|
}
|
|
|
|
// Returns the background color for a certain page. This color is
|
|
// always guaranteed to be valid
|
|
|
|
QColor ghostscript_interface::getBackgroundColor(const PageNumber& page) const {
|
|
#ifdef DEBUG_PSGS
|
|
kDebug(kvs::dvi) << "ghostscript_interface::getBackgroundColor( " << page << " )";
|
|
#endif
|
|
|
|
if (pageList.value(page) == 0)
|
|
return Qt::white;
|
|
else
|
|
return pageList.value(page)->background;
|
|
}
|
|
|
|
|
|
void ghostscript_interface::clear() {
|
|
PostScriptHeaderString->truncate(0);
|
|
|
|
// Deletes all items, removes temporary files, etc.
|
|
qDeleteAll(pageList);
|
|
pageList.clear();
|
|
}
|
|
|
|
|
|
void ghostscript_interface::gs_generate_graphics_file(const PageNumber& page, const QString& filename, long magnification) {
|
|
#ifdef DEBUG_PSGS
|
|
kDebug(kvs::dvi) << "ghostscript_interface::gs_generate_graphics_file( " << page << ", " << filename << " )";
|
|
#endif
|
|
|
|
if (knownDevices.isEmpty()) {
|
|
kError(kvs::dvi) << "No known devices found" << endl;
|
|
return;
|
|
}
|
|
|
|
pageInfo *info = pageList.value(page);
|
|
|
|
// Generate a PNG-file
|
|
// Step 1: Write the PostScriptString to a File
|
|
KTemporaryFile PSfile;
|
|
PSfile.setAutoRemove(false);
|
|
PSfile.setSuffix(".ps");
|
|
PSfile.open();
|
|
const QString PSfileName = PSfile.fileName();
|
|
|
|
QTextStream os(&PSfile);
|
|
os << "%!PS-Adobe-2.0\n"
|
|
<< "%%Creator: kdvi\n"
|
|
<< "%%Title: KDVI temporary PostScript\n"
|
|
<< "%%Pages: 1\n"
|
|
<< "%%PageOrder: Ascend\n"
|
|
// HSize and VSize in 1/72 inch
|
|
<< "%%BoundingBox: 0 0 "
|
|
<< (qint32)(72*(pixel_page_w/resolution)) << ' '
|
|
<< (qint32)(72*(pixel_page_h/resolution)) << '\n'
|
|
<< "%%EndComments\n"
|
|
<< "%!\n"
|
|
<< psheader
|
|
<< "TeXDict begin "
|
|
// HSize in (1/(65781.76*72))inch
|
|
<< (qint32)(72*65781*(pixel_page_w/resolution)) << ' '
|
|
// VSize in (1/(65781.76*72))inch
|
|
<< (qint32)(72*65781*(pixel_page_h/resolution)) << ' '
|
|
// Magnification
|
|
<< (qint32)(magnification)
|
|
// dpi and vdpi
|
|
<< " 300 300"
|
|
// Name
|
|
<< " (test.dvi)"
|
|
<< " @start end\n"
|
|
<< "TeXDict begin\n"
|
|
// Start page
|
|
<< "1 0 bop 0 0 a \n";
|
|
|
|
if (!PostScriptHeaderString->toLatin1().isNull())
|
|
os << PostScriptHeaderString->toLatin1();
|
|
|
|
if (info->background != Qt::white) {
|
|
QString colorCommand = QString("gsave %1 %2 %3 setrgbcolor clippath fill grestore\n").
|
|
arg(info->background.red()/255.0).
|
|
arg(info->background.green()/255.0).
|
|
arg(info->background.blue()/255.0);
|
|
os << colorCommand.toLatin1();
|
|
}
|
|
|
|
if (!info->PostScriptString->isNull())
|
|
os << *(info->PostScriptString);
|
|
|
|
os << "end\n"
|
|
<< "showpage \n";
|
|
|
|
PSfile.close();
|
|
|
|
// Step 2: Call GS with the File
|
|
QFile::remove(filename.toAscii());
|
|
KProcess proc;
|
|
proc.setOutputChannelMode(KProcess::SeparateChannels);
|
|
QStringList argus;
|
|
argus << "gs";
|
|
argus << "-dSAFER" << "-dPARANOIDSAFER" << "-dDELAYSAFER" << "-dNOPAUSE" << "-dBATCH";
|
|
argus << QString("-sDEVICE=%1").arg(*gsDevice);
|
|
argus << QString("-sOutputFile=%1").arg(filename);
|
|
argus << QString("-sExtraIncludePath=%1").arg(includePath);
|
|
argus << QString("-g%1x%2").arg(pixel_page_w).arg(pixel_page_h); // page size in pixels
|
|
argus << QString("-r%1").arg(resolution); // resolution in dpi
|
|
argus << "-dTextAlphaBits=4 -dGraphicsAlphaBits=2"; // Antialiasing
|
|
argus << "-c" << "<< /PermitFileReading [ ExtraIncludePath ] /PermitFileWriting [] /PermitFileControl [] >> setuserparams .locksafe";
|
|
argus << "-f" << PSfileName;
|
|
|
|
#ifdef DEBUG_PSGS
|
|
kDebug(kvs::dvi) << argus.join(" ");
|
|
#endif
|
|
|
|
proc << argus;
|
|
int res = proc.execute();
|
|
|
|
if ( res ) {
|
|
// Starting ghostscript did not work.
|
|
// TODO: Issue error message, switch PS support off.
|
|
kError(kvs::dvi) << "ghostview could not be started" << endl;
|
|
}
|
|
|
|
PSfile.remove();
|
|
|
|
// Check if gs has indeed produced a file.
|
|
if (QFile::exists(filename) == false) {
|
|
kError(kvs::dvi) << "GS did not produce output." << endl;
|
|
|
|
// No. Check is the reason is that the device is not compiled into
|
|
// ghostscript. If so, try again with another device.
|
|
QString GSoutput;
|
|
proc.setReadChannel(QProcess::StandardOutput);
|
|
while(proc.canReadLine()) {
|
|
GSoutput = QString::fromLocal8Bit(proc.readLine());
|
|
if (GSoutput.contains("Unknown device")) {
|
|
kDebug(kvs::dvi) << QString("The version of ghostview installed on this computer does not support "
|
|
"the '%1' ghostview device driver.").arg(*gsDevice) << endl;
|
|
knownDevices.erase(gsDevice);
|
|
gsDevice = knownDevices.begin();
|
|
if (knownDevices.isEmpty())
|
|
// TODO: show a requestor of some sort.
|
|
#if 0
|
|
KMessageBox::detailedError(0,
|
|
i18n("<qt>The version of Ghostview that is installed on this computer does not contain "
|
|
"any of the Ghostview device drivers that are known to Okular. PostScript "
|
|
"support has therefore been turned off in Okular.</qt>"),
|
|
i18n("<qt><p>The Ghostview program, which Okular uses internally to display the "
|
|
"PostScript graphics that is included in this DVI file, is generally able to "
|
|
"write its output in a variety of formats. The sub-programs that Ghostview uses "
|
|
"for these tasks are called 'device drivers'; there is one device driver for "
|
|
"each format that Ghostview is able to write. Different versions of Ghostview "
|
|
"often have different sets of device drivers available. It seems that the "
|
|
"version of Ghostview that is installed on this computer does not contain "
|
|
"<strong>any</strong> of the device drivers that are known to Okular.</p>"
|
|
"<p>It seems unlikely that a regular installation of Ghostview would not contain "
|
|
"these drivers. This error may therefore point to a serious misconfiguration of "
|
|
"the Ghostview installation on your computer.</p>"
|
|
"<p>If you want to fix the problems with Ghostview, you can use the command "
|
|
"<strong>gs --help</strong> to display the list of device drivers contained in "
|
|
"Ghostview. Among others, Okular can use the 'png256', 'jpeg' and 'pnm' "
|
|
"drivers. Note that Okular needs to be restarted to re-enable PostScript support."
|
|
"</p></qt>"));
|
|
#else
|
|
{}
|
|
#endif
|
|
else {
|
|
kDebug(kvs::dvi) << QString("Okular will now try to use the '%1' device driver.").arg(*gsDevice);
|
|
gs_generate_graphics_file(page, filename, magnification);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void ghostscript_interface::graphics(const PageNumber& page, double dpi, long magnification, QPainter* paint) {
|
|
#ifdef DEBUG_PSGS
|
|
kDebug(kvs::dvi) << "ghostscript_interface::graphics( " << page << ", " << dpi << ", ... ) called.";
|
|
#endif
|
|
|
|
if (paint == 0) {
|
|
kError(kvs::dvi) << "ghostscript_interface::graphics(PageNumber page, double dpi, long magnification, QPainter *paint) called with paint == 0" << endl;
|
|
return;
|
|
}
|
|
|
|
resolution = dpi;
|
|
|
|
pixel_page_w = paint->viewport().width();
|
|
pixel_page_h = paint->viewport().height();
|
|
|
|
pageInfo *info = pageList.value(page);
|
|
|
|
// No PostScript? Then return immediately.
|
|
if ((info == 0) || (info->PostScriptString->isEmpty())) {
|
|
#ifdef DEBUG_PSGS
|
|
kDebug(kvs::dvi) << "No PostScript found. Not drawing anything.";
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
QTemporaryFile gfxFile;
|
|
gfxFile.open();
|
|
const QString gfxFileName = gfxFile.fileName();
|
|
// We are want the filename, not the file.
|
|
gfxFile.close();
|
|
|
|
gs_generate_graphics_file(page, gfxFileName, magnification);
|
|
|
|
QImage MemoryCopy(gfxFileName);
|
|
paint->drawImage(0, 0, MemoryCopy);
|
|
return;
|
|
}
|
|
|
|
|
|
QString ghostscript_interface::locateEPSfile(const QString &filename, const KUrl &base)
|
|
{
|
|
// If the base URL indicates that the DVI file is local, try to find
|
|
// the graphics file in the directory where the DVI file resides
|
|
if (base.isLocalFile()) {
|
|
QString path = base.path(); // -> "/bar/foo.dvi"
|
|
QFileInfo fi1(path);
|
|
QFileInfo fi2(fi1.dir(),filename);
|
|
if (fi2.exists())
|
|
return fi2.absoluteFilePath();
|
|
}
|
|
|
|
// Otherwise, use kpsewhich to find the eps file.
|
|
KProcess proc;
|
|
proc << "kpsewhich" << filename;
|
|
proc.execute();
|
|
return QString::fromLocal8Bit(proc.readLine().trimmed());
|
|
}
|
|
|
|
#include "psgs.moc"
|