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/***************************************************************************
* Copyright (C) 2005 by Stefan Kebekus *
* kebekus@kde.org *
* *
* 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 of the License, 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 <config.h>
#include <kmessagebox.h>
#include <kdebug.h>
#include <klocale.h>
#include <tqfileinfo.h>
#include <tqpainter.h>
#include "documentWidget.h"
#include "faxrenderer.h"
#include "faxmultipage.h"
//#define KF_DEBUG
FaxRenderer::FaxRenderer(TQWidget* par)
: DocumentRenderer(par)
{
#ifdef KF_DEBUG
kdError() << "FaxRenderer( parent=" << par << " )" << endl;
#endif
}
FaxRenderer::~FaxRenderer()
{
#ifdef KF_DEBUG
kdDebug() << "~FaxRenderer" << endl;
#endif
// Wait for all access to this documentRenderer to finish
mutex.lock();
mutex.unlock();
}
void FaxRenderer::drawPage(double resolution, RenderedDocumentPage* page)
{
#ifdef KF_DEBUG
kdDebug() << "FaxRenderer::drawPage(documentPage*) called, page number " << page->getPageNumber() << endl;
#endif
// Paranoid safety checks
if (page == 0) {
kdError() << "FaxRenderer::drawPage(documentPage*) called with argument == 0" << endl;
return;
}
if (page->getPageNumber() == 0) {
kdError() << "FaxRenderer::drawPage(documentPage*) called for a documentPage with page number 0" << endl;
return;
}
// Wait for all access to this documentRenderer to finish
mutex.lock();
// more paranoid safety checks
if (page->getPageNumber() > numPages) {
kdError() << "FaxRenderer::drawPage(documentPage*) called for a documentPage with page number " << page->getPageNumber()
<< " but the current fax file has only " << numPages << " pages." << endl;
mutex.unlock();
return;
}
TQImage img = fax.page(page->getPageNumber() - 1);
SimplePageSize psize = pageSizes[page->getPageNumber() - 1];
if (psize.isValid()) {
TQPainter *foreGroundPaint = page->getPainter();
if (foreGroundPaint != 0) {
// Compute an image for the page.
// WARNING: It may be tempting to compute the image size in
// pixel, using page->height() and page->width(). DON'T DO
// THAT. KViewShell uses transformations e.g. to rotate the
// page, and sets the argument 'resolution' accordingly. Similar
// problems occur if KViewShell required a shrunken version of
// the page, e.g. to print multiple pages on one sheet of paper.
int width_in_pixel = tqRound(resolution * psize.width().getLength_in_inch());
int height_in_pixel = tqRound(resolution * psize.height().getLength_in_inch());
img = img.smoothScale(width_in_pixel, height_in_pixel);
foreGroundPaint->drawImage(0, 0, img);
page->returnPainter(foreGroundPaint);
}
} else
kdError() << "FaxRenderer::drawPage() called, but page size for page " << page->getPageNumber() << " is invalid." << endl;
// To indicate that the page was drawn, we set the appropriate flas in the page structure
page->isEmpty = false;
mutex.unlock();
}
bool FaxRenderer::setFile(const TQString &fname, const KURL &)
{
#ifdef KF_DEBUG
kdDebug() << "FaxRenderer::setFile(" << fname << ") called" << endl;
#endif
// Wait for all access to this documentRenderer to finish
mutex.lock();
// If fname is the empty string, then this means: "close".
if (fname.isEmpty()) {
kdDebug() << "FaxRenderer::setFile( ... ) called with empty filename. Closing the file." << endl;
mutex.unlock();
return true;
}
// Paranoid saftey checks: make sure the file actually exists, and
// that it is a file, not a directory. Otherwise, show an error
// message and exit..
TQFileInfo fi(fname);
TQString filename = fi.absFilePath();
if (!fi.exists() || fi.isDir()) {
KMessageBox::error( parentWidget,
i18n("<qt><strong>File error.</strong> The specified file '%1' does not exist.</qt>").arg(filename),
i18n("File Error"));
// the return value 'false' indicates that this operation was not successful.
mutex.unlock();
return false;
}
// Now we assume that the file is fine and load the file into the
// fax member. We abort on error and give an error message.
bool ok = fax.loadImage(filename);
// It can happen that fax.loadImage() returns with 'ok == true', but
// still the file could NOT be loaded. This happens, e.g. for TIFF
// file that do NOT contain FAX, but other image formats. We handle
// that case here also.
if ( (!ok) || (fax.numPages() == 0)) {
// Unfortunately, it can happen that fax.loadImage() fails WITHOUT
// leaving an error message in fax.errorString(). We try to handle
// this case gracefully.
if (fax.errorString().isEmpty())
KMessageBox::error( parentWidget,
i18n("<qt><strong>File error.</strong> The specified file '%1' could not be loaded.</qt>").arg(filename),
i18n("File Error"));
else
KMessageBox::detailedError( parentWidget,
i18n("<qt><strong>File error.</strong> The specified file '%1' could not be loaded.</qt>").arg(filename),
fax.errorString(),
i18n("File Error"));
clear();
mutex.unlock();
return false;
}
// Set the number of pages page sizes
numPages = fax.numPages();
// Set the page size for the first page in the pageSizes array.
// The rest of the page sizes will be calculated on demand by the drawPage function.
pageSizes.resize(numPages);
Length w,h;
if (numPages != 0) {
for(TQ_UINT16 pg=0; pg < numPages; pg++) {
TQSize pageSize = fax.page_size(pg);
TQPoint dpi = fax.page_dpi(pg);
double dpix = dpi.x();
double dpiy = dpi.y();
if (dpix*dpiy < 1.0) {
kdError() << "File invalid resolutions, dpi x = " << dpix << ", dpi y = " << dpiy << ". This information will be ignored and 75 DPI assumed." << endl;
dpix = dpiy = 75.0;
}
w.setLength_in_inch(pageSize.width() / dpix);
h.setLength_in_inch(pageSize.height() / dpiy);
pageSizes[pg].setPageSize(w, h);
}
}
// the return value 'true' indicates that this operation was not successful.
mutex.unlock();
return true;
}
#include "faxrenderer.moc"
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