/*************************************************************************** * 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 #include #include #include #include #include #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("File error. The specified file '%1' does not exist.").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("File error. The specified file '%1' could not be loaded.").arg(filename), i18n("File Error")); else KMessageBox::detailedError( parentWidget, i18n("File error. The specified file '%1' could not be loaded.").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"