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Diffstat (limited to 'src/extension/internal/pdfinput/pdf-input.cpp')
| -rw-r--r-- | src/extension/internal/pdfinput/pdf-input.cpp | 861 |
1 files changed, 861 insertions, 0 deletions
diff --git a/src/extension/internal/pdfinput/pdf-input.cpp b/src/extension/internal/pdfinput/pdf-input.cpp new file mode 100644 index 0000000..302af06 --- /dev/null +++ b/src/extension/internal/pdfinput/pdf-input.cpp @@ -0,0 +1,861 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Native PDF import using libpoppler. + * + * Authors: + * miklos erdelyi + * Abhishek Sharma + * + * Copyright (C) 2007 Authors + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + * + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" // only include where actually required! +#endif + +#include "pdf-input.h" + +#ifdef HAVE_POPPLER +#include <poppler/Catalog.h> +#include <poppler/ErrorCodes.h> +#include <poppler/FontInfo.h> +#include <poppler/GfxFont.h> +#include <poppler/GlobalParams.h> +#include <poppler/OptionalContent.h> +#include <poppler/PDFDoc.h> +#include <poppler/Page.h> +#include <poppler/goo/GooString.h> + +#ifdef HAVE_POPPLER_CAIRO +#include <poppler/glib/poppler.h> +#include <poppler/glib/poppler-document.h> +#include <poppler/glib/poppler-page.h> +#endif + +#include <gdkmm/general.h> +#include <glibmm/convert.h> +#include <glibmm/i18n.h> +#include <glibmm/miscutils.h> +#include <gtk/gtk.h> +#include <gtkmm/checkbutton.h> +#include <gtkmm/comboboxtext.h> +#include <gtkmm/drawingarea.h> +#include <gtkmm/frame.h> +#include <gtkmm/radiobutton.h> +#include <gtkmm/scale.h> +#include <utility> + +#include "document-undo.h" +#include "extension/input.h" +#include "extension/system.h" +#include "inkscape.h" +#include "object/sp-root.h" +#include "pdf-parser.h" +#include "ui/builder-utils.h" +#include "ui/dialog-events.h" +#include "ui/widget/frame.h" +#include "ui/widget/spinbutton.h" +#include "util/parse-int-range.h" +#include "util/units.h" + +using namespace Inkscape::UI; + +namespace { + +void sanitize_page_number(int &page_num, const int num_pages) { + if (page_num < 1 || page_num > num_pages) { + std::cerr << "Inkscape::Extension::Internal::PdfInput::open: Bad page number " + << page_num + << ". Import first page instead." + << std::endl; + page_num = 1; + } +} + +} + +namespace Inkscape { +namespace Extension { +namespace Internal { + +class FontModelColumns : public Gtk::TreeModel::ColumnRecord +{ +public: + FontModelColumns() + { + add(id); + add(family); + add(style); + add(weight); + add(stretch); + add(proc_label); + add(proc_id); + add(icon); + add(em); + } + ~FontModelColumns() override = default; + Gtk::TreeModelColumn<int> id; + Gtk::TreeModelColumn<Glib::ustring> family; + Gtk::TreeModelColumn<Glib::ustring> style; + Gtk::TreeModelColumn<Glib::ustring> weight; + Gtk::TreeModelColumn<Glib::ustring> stretch; + Gtk::TreeModelColumn<Glib::ustring> proc_label; + Gtk::TreeModelColumn<int> proc_id; + Gtk::TreeModelColumn<Glib::ustring> icon; + Gtk::TreeModelColumn<bool> em; +}; + +/** + * \brief The PDF import dialog + * FIXME: Probably this should be placed into src/ui/dialog + */ + +PdfImportDialog::PdfImportDialog(std::shared_ptr<PDFDoc> doc, const gchar * /*uri*/) + : _pdf_doc(std::move(doc)) + , _builder(UI::create_builder("extension-pdfinput.glade")) + , _page_numbers(UI::get_widget<Gtk::Entry>(_builder, "page-numbers")) + , _preview_area(UI::get_widget<Gtk::DrawingArea>(_builder, "preview-area")) + , _embed_images(UI::get_widget<Gtk::CheckButton>(_builder, "embed-images")) + , _mesh_slider(UI::get_widget<Gtk::Scale>(_builder, "mesh-slider")) + , _mesh_label(UI::get_widget<Gtk::Label>(_builder, "mesh-label")) + , _next_page(UI::get_widget<Gtk::Button>(_builder, "next-page")) + , _prev_page(UI::get_widget<Gtk::Button>(_builder, "prev-page")) + , _current_page(UI::get_widget<Gtk::Label>(_builder, "current-page")) + , _font_model(UI::get_object<Gtk::ListStore>(_builder, "font-list")) + , _font_col(new FontModelColumns()) +{ + assert(_pdf_doc); + + _setFonts(getPdfFonts(_pdf_doc)); + + auto okbutton = Gtk::manage(new Gtk::Button(_("_OK"), true)); + + get_content_area()->set_homogeneous(false); + get_content_area()->set_spacing(0); + + get_content_area()->pack_start(UI::get_widget<Gtk::Box>(_builder, "content")); + + this->set_title(_("PDF Import Settings")); + this->set_modal(true); + sp_transientize(GTK_WIDGET(this->gobj())); //Make transient + this->property_window_position().set_value(Gtk::WIN_POS_NONE); + this->set_resizable(true); + this->property_destroy_with_parent().set_value(false); + + this->add_action_widget(*Gtk::manage(new Gtk::Button(_("_Cancel"), true)), -6); + this->add_action_widget(*okbutton, -5); + + this->show_all(); + + _render_thumb = false; + + // Connect signals + _next_page.signal_clicked().connect([=] { _setPreviewPage(_preview_page + 1); }); + _prev_page.signal_clicked().connect([=] { _setPreviewPage(_preview_page - 1); }); + _preview_area.signal_draw().connect(sigc::mem_fun(*this, &PdfImportDialog::_onDraw)); + _page_numbers.signal_changed().connect(sigc::mem_fun(*this, &PdfImportDialog::_onPageNumberChanged)); + _mesh_slider.get_adjustment()->signal_value_changed().connect( + sigc::mem_fun(*this, &PdfImportDialog::_onPrecisionChanged)); + +#ifdef HAVE_POPPLER_CAIRO + _render_thumb = true; + + // Disable the page selector when there's only one page + _total_pages = _pdf_doc->getCatalog()->getNumPages(); + _page_numbers.set_sensitive(_total_pages > 1); + + // Create PopplerDocument + std::string filename = _pdf_doc->getFileName()->getCString(); + if (!Glib::path_is_absolute(filename)) { + filename = Glib::build_filename(Glib::get_current_dir(),filename); + } + Glib::ustring full_uri = Glib::filename_to_uri(filename); + + if (!full_uri.empty()) { + _poppler_doc = poppler_document_new_from_file(full_uri.c_str(), NULL, NULL); + } +#endif + + // Set default preview size + _preview_width = 200; + _preview_height = 300; + + // Init preview + _thumb_data = nullptr; + _current_pages = "all"; + _setPreviewPage(1); + + okbutton->set_can_focus(); + okbutton->set_can_default(); + set_default(*okbutton); + set_focus(*okbutton); + + auto &font_strat = UI::get_object_raw<Gtk::CellRendererCombo>(_builder, "cell-strat"); + font_strat.signal_changed().connect([=](const Glib::ustring &path, const Gtk::TreeModel::iterator &source) { + if (auto target = _font_model->get_iter(path)) { + (*target)[_font_col->proc_id] = int((*source)[_font_col->id]); + (*target)[_font_col->proc_label] = Glib::ustring((*source)[_font_col->family]); + } + }); + + auto &font_render = UI::get_widget<Gtk::ComboBox>(_builder, "font-rendering"); + font_render.signal_changed().connect(sigc::mem_fun(*this, &PdfImportDialog::_fontRenderChanged)); + _fontRenderChanged(); +} + +PdfImportDialog::~PdfImportDialog() { +#ifdef HAVE_POPPLER_CAIRO + if (_cairo_surface) { + cairo_surface_destroy(_cairo_surface); + } + if (_poppler_doc) { + g_object_unref(G_OBJECT(_poppler_doc)); + } +#endif + if (_thumb_data) { + gfree(_thumb_data); + } +} + +bool PdfImportDialog::showDialog() { + show(); + gint b = run(); + hide(); + if ( b == Gtk::RESPONSE_OK ) { + return TRUE; + } else { + return FALSE; + } +} + +std::string PdfImportDialog::getSelectedPages() { + if (_page_numbers.get_sensitive()) { + return _current_pages; + } + return "all"; +} + +PdfImportType PdfImportDialog::getImportMethod() +{ + auto &import_type = UI::get_widget<Gtk::Notebook>(_builder, "import-type"); + return (PdfImportType)import_type.get_current_page(); +} + +/** + * \brief Retrieves the current settings into a repr which SvgBuilder will use + * for determining the behaviour desired by the user + */ +void PdfImportDialog::getImportSettings(Inkscape::XML::Node *prefs) { + prefs->setAttribute("selectedPages", _current_pages); + + auto &clip_to = UI::get_widget<Gtk::ComboBox>(_builder, "clip-to"); + + prefs->setAttribute("cropTo", clip_to.get_active_id()); + prefs->setAttributeSvgDouble("approximationPrecision", _mesh_slider.get_value()); + prefs->setAttributeBoolean("embedImages", _embed_images.get_active()); +} + +/** + * \brief Redisplay the comment on the current approximation precision setting + * Evenly divides the interval of possible values between the available labels. + */ +void PdfImportDialog::_onPrecisionChanged() { + static Glib::ustring labels[] = { + Glib::ustring(C_("PDF input precision", "rough")), Glib::ustring(C_("PDF input precision", "medium")), + Glib::ustring(C_("PDF input precision", "fine")), Glib::ustring(C_("PDF input precision", "very fine"))}; + + auto adj = _mesh_slider.get_adjustment(); + double min = adj->get_lower(); + double value = adj->get_value() - min; + double max = adj->get_upper() - min; + double interval_len = max / (double)(sizeof(labels) / sizeof(labels[0])); + int comment_idx = (int)floor(value / interval_len); + _mesh_label.set_label(labels[comment_idx]); +} + +void PdfImportDialog::_onPageNumberChanged() +{ + _current_pages = _page_numbers.get_text(); + auto nums = parseIntRange(_current_pages, 1, _total_pages); + if (!nums.empty()) { + _setPreviewPage(*nums.begin()); + } +} + +/** + * Set a full list of all fonts in use for the whole PDF document. + */ +void PdfImportDialog::_setFonts(const FontList &fonts) +{ + _font_model->clear(); + _font_list = fonts; + + // Find all fonts on this one page + /*std::set<int> found; + FontInfoScanner page_scanner(_pdf_doc.get(), page-1); + for (const FontInfo *font : page_scanner.scan(page)) { + found.insert(font->getRef().num); + delete font; + }*/ + + // Now add all fonts and mark the ones from this page + for (auto pair : *fonts) { + auto font = pair.first; + auto &data = pair.second; + auto row = *_font_model->append(); + + row[_font_col->id] = font->getID()->num; + row[_font_col->em] = false; + row[_font_col->family] = data.family; + row[_font_col->style] = data.style; + row[_font_col->weight] = data.weight; + row[_font_col->stretch] = data.stretch; + // row[_font_col->pages] = data.pages; + + if (font->isCIDFont()) { + row[_font_col->icon] = Glib::ustring("text-convert-to-regular"); + } else { + row[_font_col->icon] = Glib::ustring(data.found ? "on" : "off-outline"); + } + } +} + +void PdfImportDialog::_fontRenderChanged() +{ + auto &font_render = UI::get_widget<Gtk::ComboBox>(_builder, "font-rendering"); + FontStrategy choice = (FontStrategy)std::stoi(font_render.get_active_id().c_str()); + setFontStrategies(SvgBuilder::autoFontStrategies(choice, _font_list)); +} + +/** + * Saves each decided font strategy to the Svg Builder object. + */ +FontStrategies PdfImportDialog::getFontStrategies() +{ + FontStrategies fs; + for (auto child : _font_model->children()) { + auto value = (FontFallback) int(child[_font_col->proc_id]); + fs[child[_font_col->id]] = value; + } + return fs; +} + +/** + * Update the font strats. + */ +void PdfImportDialog::setFontStrategies(const FontStrategies &fs) +{ + for (auto child : _font_model->children()) { + auto value = fs.at(child[_font_col->id]); + child[_font_col->proc_id] = (int)value; + switch (value) { + case FontFallback::AS_SHAPES: + child[_font_col->proc_label] = _("Convert to paths"); + break; + case FontFallback::AS_TEXT: + child[_font_col->proc_label] = _("Keep original font name"); + break; + case FontFallback::AS_SUB: + child[_font_col->proc_label] = _("Replace by closest-named installed font"); + break; + case FontFallback::DELETE_TEXT: + child[_font_col->proc_label] = _("Delete text"); + break; + } + } +} + +#ifdef HAVE_POPPLER_CAIRO +/** + * \brief Copies image data from a Cairo surface to a pixbuf + * + * Borrowed from libpoppler, from the file poppler-page.cc + * Copyright (C) 2005, Red Hat, Inc. + * + */ +static void copy_cairo_surface_to_pixbuf (cairo_surface_t *surface, + unsigned char *data, + GdkPixbuf *pixbuf) +{ + int cairo_width, cairo_height, cairo_rowstride; + unsigned char *pixbuf_data, *dst, *cairo_data; + int pixbuf_rowstride, pixbuf_n_channels; + unsigned int *src; + int x, y; + + cairo_width = cairo_image_surface_get_width (surface); + cairo_height = cairo_image_surface_get_height (surface); + cairo_rowstride = cairo_width * 4; + cairo_data = data; + + pixbuf_data = gdk_pixbuf_get_pixels (pixbuf); + pixbuf_rowstride = gdk_pixbuf_get_rowstride (pixbuf); + pixbuf_n_channels = gdk_pixbuf_get_n_channels (pixbuf); + + if (cairo_width > gdk_pixbuf_get_width (pixbuf)) + cairo_width = gdk_pixbuf_get_width (pixbuf); + if (cairo_height > gdk_pixbuf_get_height (pixbuf)) + cairo_height = gdk_pixbuf_get_height (pixbuf); + for (y = 0; y < cairo_height; y++) + { + src = reinterpret_cast<unsigned int *>(cairo_data + y * cairo_rowstride); + dst = pixbuf_data + y * pixbuf_rowstride; + for (x = 0; x < cairo_width; x++) + { + dst[0] = (*src >> 16) & 0xff; + dst[1] = (*src >> 8) & 0xff; + dst[2] = (*src >> 0) & 0xff; + if (pixbuf_n_channels == 4) + dst[3] = (*src >> 24) & 0xff; + dst += pixbuf_n_channels; + src++; + } + } +} + +#endif + +bool PdfImportDialog::_onDraw(const Cairo::RefPtr<Cairo::Context>& cr) { + // Check if we have a thumbnail at all + if (!_thumb_data) { + return true; + } + + // Create the pixbuf for the thumbnail + Glib::RefPtr<Gdk::Pixbuf> thumb; + + if (_render_thumb) { + thumb = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true, + 8, _thumb_width, _thumb_height); + } else { + thumb = Gdk::Pixbuf::create_from_data(_thumb_data, Gdk::COLORSPACE_RGB, + false, 8, _thumb_width, _thumb_height, _thumb_rowstride); + } + if (!thumb) { + return true; + } + + // Set background to white + if (_render_thumb) { + thumb->fill(0xffffffff); + Gdk::Cairo::set_source_pixbuf(cr, thumb, 0, 0); + cr->paint(); + } +#ifdef HAVE_POPPLER_CAIRO + // Copy the thumbnail image from the Cairo surface + if (_render_thumb) { + copy_cairo_surface_to_pixbuf(_cairo_surface, _thumb_data, thumb->gobj()); + } +#endif + + Gdk::Cairo::set_source_pixbuf(cr, thumb, 0, _render_thumb ? 0 : 20); + cr->paint(); + return true; +} + +/** + * \brief Renders the given page's thumbnail using Cairo + */ +void PdfImportDialog::_setPreviewPage(int page) { + _previewed_page = _pdf_doc->getCatalog()->getPage(page); + g_return_if_fail(_previewed_page); + + // Update the UI to select a different page + _preview_page = page; + _next_page.set_sensitive(page < _total_pages); + _prev_page.set_sensitive(page > 1); + std::ostringstream example; + example << page << " / " << _total_pages; + _current_page.set_label(example.str()); + + // Update the font list with per-page highlighting + // XXX Update this psuedo code with real code + /*for (auto iter : _font_model->children()) { + std::unorderd_list<int> *pages = row[_font_col->pages]; + row[_font_col->em] = bool(page in pages); + }*/ + + // Try to get a thumbnail from the PDF if possible + if (!_render_thumb) { + if (_thumb_data) { + gfree(_thumb_data); + _thumb_data = nullptr; + } + if (!_previewed_page->loadThumb(&_thumb_data, + &_thumb_width, &_thumb_height, &_thumb_rowstride)) { + return; + } + // Redraw preview area + _preview_area.set_size_request(_thumb_width, _thumb_height + 20); + _preview_area.queue_draw(); + return; + } +#ifdef HAVE_POPPLER_CAIRO + // Get page size by accounting for rotation + double width, height; + int rotate = _previewed_page->getRotate(); + if ( rotate == 90 || rotate == 270 ) { + height = _previewed_page->getCropWidth(); + width = _previewed_page->getCropHeight(); + } else { + width = _previewed_page->getCropWidth(); + height = _previewed_page->getCropHeight(); + } + // Calculate the needed scaling for the page + double scale_x = (double)_preview_width / width; + double scale_y = (double)_preview_height / height; + double scale_factor = ( scale_x > scale_y ) ? scale_y : scale_x; + // Create new Cairo surface + _thumb_width = (int)ceil( width * scale_factor ); + _thumb_height = (int)ceil( height * scale_factor ); + _thumb_rowstride = _thumb_width * 4; + if (_thumb_data) { + gfree(_thumb_data); + } + _thumb_data = reinterpret_cast<unsigned char *>(gmalloc(_thumb_rowstride * _thumb_height)); + if (_cairo_surface) { + cairo_surface_destroy(_cairo_surface); + } + _cairo_surface = cairo_image_surface_create_for_data(_thumb_data, + CAIRO_FORMAT_ARGB32, _thumb_width, _thumb_height, _thumb_rowstride); + cairo_t *cr = cairo_create(_cairo_surface); + cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0); // Set fill color to white + cairo_paint(cr); // Clear it + cairo_scale(cr, scale_factor, scale_factor); // Use Cairo for resizing the image + // Render page + if (_poppler_doc != NULL) { + PopplerPage *poppler_page = poppler_document_get_page(_poppler_doc, page-1); + poppler_page_render(poppler_page, cr); + g_object_unref(G_OBJECT(poppler_page)); + } + // Clean up + cairo_destroy(cr); + // Redraw preview area + _preview_area.set_size_request(_preview_width, _preview_height); + _preview_area.queue_draw(); +#endif +} + +//////////////////////////////////////////////////////////////////////////////// + +#ifdef HAVE_POPPLER_CAIRO +/// helper method +static cairo_status_t + _write_ustring_cb(void *closure, const unsigned char *data, unsigned int length) +{ + Glib::ustring* stream = static_cast<Glib::ustring*>(closure); + stream->append(reinterpret_cast<const char*>(data), length); + + return CAIRO_STATUS_SUCCESS; +} +#endif + +/** + * Parses the selected page of the given PDF document using PdfParser. + */ +SPDocument * +PdfInput::open(::Inkscape::Extension::Input * /*mod*/, const gchar * uri) { + + // Initialize the globalParams variable for poppler + if (!globalParams) { + globalParams = _POPPLER_NEW_GLOBAL_PARAMS(); + } + + + // Open the file using poppler + // PDFDoc is from poppler. PDFDoc is used for preview and for native import. + std::shared_ptr<PDFDoc> pdf_doc; + + // poppler does not use glib g_open. So on win32 we must use unicode call. code was copied from + // glib gstdio.c + pdf_doc = _POPPLER_MAKE_SHARED_PDFDOC(uri); // TODO: Could ask for password + + if (!pdf_doc->isOk()) { + int error = pdf_doc->getErrorCode(); + if (error == errEncrypted) { + g_message("Document is encrypted."); + } else if (error == errOpenFile) { + g_message("couldn't open the PDF file."); + } else if (error == errBadCatalog) { + g_message("couldn't read the page catalog."); + } else if (error == errDamaged) { + g_message("PDF file was damaged and couldn't be repaired."); + } else if (error == errHighlightFile) { + g_message("nonexistent or invalid highlight file."); + } else if (error == errBadPrinter) { + g_message("invalid printer."); + } else if (error == errPrinting) { + g_message("Error during printing."); + } else if (error == errPermission) { + g_message("PDF file does not allow that operation."); + } else if (error == errBadPageNum) { + g_message("invalid page number."); + } else if (error == errFileIO) { + g_message("file IO error."); + } else { + g_message("Failed to load document from data (error %d)", error); + } + + return nullptr; + } + + + std::unique_ptr<PdfImportDialog> dlg; + if (INKSCAPE.use_gui()) { + dlg = std::make_unique<PdfImportDialog>(pdf_doc, uri); + if (!dlg->showDialog()) { + throw Input::open_cancelled(); + } + } + + // Get options + std::string page_nums = "1"; + PdfImportType import_method = PdfImportType::PDF_IMPORT_INTERNAL; + FontStrategies font_strats; + if (dlg) { + page_nums = dlg->getSelectedPages(); + import_method = dlg->getImportMethod(); + font_strats = dlg->getFontStrategies(); + } else { + page_nums = INKSCAPE.get_pages(); + auto strat = (FontStrategy)INKSCAPE.get_pdf_font_strategy(); + font_strats = SvgBuilder::autoFontStrategies(strat, getPdfFonts(pdf_doc)); +#ifdef HAVE_POPPLER_CAIRO + import_method = (PdfImportType)INKSCAPE.get_pdf_poppler(); +#endif + } + // Both poppler and poppler+cairo can get page num info from poppler. + auto pages = parseIntRange(page_nums, 1, pdf_doc->getCatalog()->getNumPages()); + if (pages.empty()) { + g_warning("No pages selected, getting first page only."); + pages.insert(1); + } + + // Create Inkscape document from file + SPDocument *doc = nullptr; + bool saved = false; + if (import_method == PdfImportType::PDF_IMPORT_INTERNAL) { + // Create document + doc = SPDocument::createNewDoc(nullptr, true, true); + saved = DocumentUndo::getUndoSensitive(doc); + DocumentUndo::setUndoSensitive(doc, false); // No need to undo in this temporary document + + // Create builder + gchar *docname = g_path_get_basename(uri); + gchar *dot = g_strrstr(docname, "."); + if (dot) { + *dot = 0; + } + SvgBuilder *builder = new SvgBuilder(doc, docname, pdf_doc->getXRef()); + builder->setFontStrategies(font_strats); + + // Get preferences + Inkscape::XML::Node *prefs = builder->getPreferences(); + if (dlg) + dlg->getImportSettings(prefs); + + for (auto p : pages) { + // And then add each of the pages + add_builder_page(pdf_doc, builder, doc, p); + } + + delete builder; + g_free(docname); +#ifdef HAVE_POPPLER_CAIRO + } else if (import_method == PdfImportType::PDF_IMPORT_CAIRO) { + // the poppler import + + std::string full_path = uri; + if (!Glib::path_is_absolute(uri)) { + full_path = Glib::build_filename(Glib::get_current_dir(),uri); + } + Glib::ustring full_uri = Glib::filename_to_uri(full_path); + + GError *error = NULL; + /// @todo handle password + /// @todo check if win32 unicode needs special attention + PopplerDocument* document = poppler_document_new_from_file(full_uri.c_str(), NULL, &error); + + if(error != NULL) { + std::cerr << "PDFInput::open: error opening document: " << full_uri.raw() << std::endl; + g_error_free (error); + return nullptr; + } + + int page_num = *pages.begin(); + if (PopplerPage* page = poppler_document_get_page(document, page_num - 1)) { + double width, height; + poppler_page_get_size(page, &width, &height); + + Glib::ustring output; + cairo_surface_t* surface = cairo_svg_surface_create_for_stream(Inkscape::Extension::Internal::_write_ustring_cb, + &output, width, height); + + // Reset back to PT for cairo 1.17.6 and above which sets to UNIT_USER + cairo_svg_surface_set_document_unit(surface, CAIRO_SVG_UNIT_PT); + + // This magical function results in more fine-grain fallbacks. In particular, a mesh + // gradient won't necessarily result in the whole PDF being rasterized. Of course, SVG + // 1.2 never made it as a standard, but hey, we'll take what we can get. This trick was + // found by examining the 'pdftocairo' code. + cairo_svg_surface_restrict_to_version( surface, CAIRO_SVG_VERSION_1_2 ); + + cairo_t* cr = cairo_create(surface); + + poppler_page_render_for_printing(page, cr); + cairo_show_page(cr); + + cairo_destroy(cr); + cairo_surface_destroy(surface); + + doc = SPDocument::createNewDocFromMem(output.c_str(), output.length(), TRUE); + + g_object_unref(G_OBJECT(page)); + } else if (document) { + std::cerr << "PDFInput::open: error opening page " << page_num << " of document: " << full_uri.raw() << std::endl; + } + g_object_unref(G_OBJECT(document)); + + if (!doc) { + return nullptr; + } + + saved = DocumentUndo::getUndoSensitive(doc); + DocumentUndo::setUndoSensitive(doc, false); // No need to undo in this temporary document +#endif + } + + // Set viewBox if it doesn't exist + if (!doc->getRoot()->viewBox_set) { + doc->setViewBox(Geom::Rect::from_xywh(0, 0, doc->getWidth().value(doc->getDisplayUnit()), doc->getHeight().value(doc->getDisplayUnit()))); + } + + // Restore undo + DocumentUndo::setUndoSensitive(doc, saved); + + return doc; +} + +/** + * Parses the selected page object of the given PDF document using PdfParser. + */ +void +PdfInput::add_builder_page(std::shared_ptr<PDFDoc>pdf_doc, SvgBuilder *builder, SPDocument *doc, int page_num) +{ + Inkscape::XML::Node *prefs = builder->getPreferences(); + + // Check page exists + Catalog *catalog = pdf_doc->getCatalog(); + sanitize_page_number(page_num, catalog->getNumPages()); + Page *page = catalog->getPage(page_num); + if (!page) { + std::cerr << "PDFInput::open: error opening page " << page_num << std::endl; + return; + } + + // Apply crop settings + _POPPLER_CONST PDFRectangle *clipToBox = nullptr; + + switch (prefs->getAttributeInt("cropTo", -1)) { + case 0: // Media box + clipToBox = page->getMediaBox(); + break; + case 1: // Crop box + clipToBox = page->getCropBox(); + break; + case 2: // Trim box + clipToBox = page->getTrimBox(); + break; + case 3: // Bleed box + clipToBox = page->getBleedBox(); + break; + case 4: // Art box + clipToBox = page->getArtBox(); + break; + default: + break; + } + + // Create parser (extension/internal/pdfinput/pdf-parser.h) + PdfParser *pdf_parser = new PdfParser(pdf_doc, builder, page, clipToBox); + + // Set up approximation precision for parser. Used for converting Mesh Gradients into tiles. + double color_delta = prefs->getAttributeDouble("approximationPrecision", 2.0); + if ( color_delta <= 0.0 ) { + color_delta = 1.0 / 2.0; + } else { + color_delta = 1.0 / color_delta; + } + for ( int i = 1 ; i <= pdfNumShadingTypes ; i++ ) { + pdf_parser->setApproximationPrecision(i, color_delta, 6); + } + + // Parse the document structure +#if defined(POPPLER_NEW_OBJECT_API) + Object obj = page->getContents(); +#else + Object obj; + page->getContents(&obj); +#endif + if (!obj.isNull()) { + pdf_parser->parse(&obj); + } + + // Cleanup +#if !defined(POPPLER_NEW_OBJECT_API) + obj.free(); +#endif + delete pdf_parser; +} + +#include "../clear-n_.h" + +void PdfInput::init() { + /* PDF in */ + // clang-format off + Inkscape::Extension::build_from_mem( + "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n" + "<name>" N_("PDF Input") "</name>\n" + "<id>org.inkscape.input.pdf</id>\n" + "<input>\n" + "<extension>.pdf</extension>\n" + "<mimetype>application/pdf</mimetype>\n" + "<filetypename>" N_("Portable Document Format (*.pdf)") "</filetypename>\n" + "<filetypetooltip>" N_("Portable Document Format") "</filetypetooltip>\n" + "</input>\n" + "</inkscape-extension>", new PdfInput()); + // clang-format on + + /* AI in */ + // clang-format off + Inkscape::Extension::build_from_mem( + "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n" + "<name>" N_("AI Input") "</name>\n" + "<id>org.inkscape.input.ai</id>\n" + "<input>\n" + "<extension>.ai</extension>\n" + "<mimetype>image/x-adobe-illustrator</mimetype>\n" + "<filetypename>" N_("Adobe Illustrator 9.0 and above (*.ai)") "</filetypename>\n" + "<filetypetooltip>" N_("Open files saved in Adobe Illustrator 9.0 and newer versions") "</filetypetooltip>\n" + "</input>\n" + "</inkscape-extension>", new PdfInput()); + // clang-format on +} // init + +} } } /* namespace Inkscape, Extension, Implementation */ + +#endif /* HAVE_POPPLER */ + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 : |