From cca66b9ec4e494c1d919bff0f71a820d8afab1fa Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:24:48 +0200 Subject: Adding upstream version 1.2.2. Signed-off-by: Daniel Baumann --- src/extension/internal/pdfinput/pdf-input.cpp | 1003 ++++++ src/extension/internal/pdfinput/pdf-input.h | 170 + src/extension/internal/pdfinput/pdf-parser.cpp | 3368 ++++++++++++++++++++ src/extension/internal/pdfinput/pdf-parser.h | 356 +++ .../internal/pdfinput/poppler-transition-api.h | 95 + src/extension/internal/pdfinput/svg-builder.cpp | 1983 ++++++++++++ src/extension/internal/pdfinput/svg-builder.h | 257 ++ 7 files changed, 7232 insertions(+) create mode 100644 src/extension/internal/pdfinput/pdf-input.cpp create mode 100644 src/extension/internal/pdfinput/pdf-input.h create mode 100644 src/extension/internal/pdfinput/pdf-parser.cpp create mode 100644 src/extension/internal/pdfinput/pdf-parser.h create mode 100644 src/extension/internal/pdfinput/poppler-transition-api.h create mode 100644 src/extension/internal/pdfinput/svg-builder.cpp create mode 100644 src/extension/internal/pdfinput/svg-builder.h (limited to 'src/extension/internal/pdfinput') diff --git a/src/extension/internal/pdfinput/pdf-input.cpp b/src/extension/internal/pdfinput/pdf-input.cpp new file mode 100644 index 0000000..cdf2237 --- /dev/null +++ b/src/extension/internal/pdfinput/pdf-input.cpp @@ -0,0 +1,1003 @@ +// 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 +#include +#include +#include +#include +#include + +#ifdef HAVE_POPPLER_CAIRO +#include +#include +#include +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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/dialog-events.h" +#include "ui/widget/frame.h" +#include "ui/widget/spinbutton.h" +#include "util/units.h" + + + +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 { + +/** + * \brief The PDF import dialog + * FIXME: Probably this should be placed into src/ui/dialog + */ + +static const gchar * crop_setting_choices[] = { + //TRANSLATORS: The following are document crop settings for PDF import + // more info: http://www.acrobatusers.com/tech_corners/javascript_corner/tips/2006/page_bounds/ + N_("media box"), + N_("crop box"), + N_("trim box"), + N_("bleed box"), + N_("art box") +}; + +PdfImportDialog::PdfImportDialog(std::shared_ptr doc, const gchar */*uri*/) + : _pdf_doc(std::move(doc)) +{ + assert(_pdf_doc); +#ifdef HAVE_POPPLER_CAIRO + _poppler_doc = NULL; +#endif // HAVE_POPPLER_CAIRO + cancelbutton = Gtk::manage(new Gtk::Button(_("_Cancel"), true)); + okbutton = Gtk::manage(new Gtk::Button(_("_OK"), true)); + _labelSelect = Gtk::manage(new class Gtk::Label(_("Select page:"))); + + // All Pages + _pageAllPages = Gtk::manage(new class Gtk::CheckButton(_("All"))); + + // Page number + auto _pageNumberSpin_adj = Gtk::Adjustment::create(1, 1, _pdf_doc->getNumPages(), 1, 10, 0); + _pageNumberSpin = Gtk::manage(new Inkscape::UI::Widget::SpinButton(_pageNumberSpin_adj, 1, 1)); + _pageNumberSpin->set_sensitive(false); + _labelTotalPages = Gtk::manage(new class Gtk::Label()); + hbox2 = Gtk::manage(new class Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 0)); + + // Disable the page selector when there's only one page + int num_pages = _pdf_doc->getCatalog()->getNumPages(); + if ( num_pages == 1 ) { + _pageAllPages->set_sensitive(false); + } else { + // Display total number of pages + gchar *label_text = g_strdup_printf(_("out of %i"), num_pages); + _labelTotalPages->set_label(label_text); + g_free(label_text); + } + + // Crop settings + _cropCheck = Gtk::manage(new class Gtk::CheckButton(_("Clip to:"))); + _cropTypeCombo = Gtk::manage(new class Gtk::ComboBoxText()); + int num_crop_choices = sizeof(crop_setting_choices) / sizeof(crop_setting_choices[0]); + for ( int i = 0 ; i < num_crop_choices ; i++ ) { + _cropTypeCombo->append(_(crop_setting_choices[i])); + } + _cropTypeCombo->set_active_text(_(crop_setting_choices[0])); + _cropTypeCombo->set_sensitive(false); + + hbox3 = Gtk::manage(new class Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 4)); + vbox2 = Gtk::manage(new class Gtk::Box(Gtk::ORIENTATION_VERTICAL, 4)); + _pageSettingsFrame = Gtk::manage(new class Inkscape::UI::Widget::Frame(_("Page settings"))); + _labelPrecision = Gtk::manage(new class Gtk::Label(_("Precision of approximating gradient meshes:"))); + _labelPrecisionWarning = Gtk::manage(new class Gtk::Label(_("Note: setting the precision too high may result in a large SVG file and slow performance."))); + _labelPrecisionWarning->set_max_width_chars(50); + +#ifdef HAVE_POPPLER_CAIRO + Gtk::RadioButton::Group group; + _importViaPoppler = Gtk::manage(new class Gtk::RadioButton(group,_("Poppler/Cairo import"))); + _labelViaPoppler = Gtk::manage(new class Gtk::Label(_("Import via external library. Text consists of groups containing cloned glyphs where each glyph is a path. Images are stored internally. Meshes cause entire document to be rendered as a raster image."))); + _labelViaPoppler->set_max_width_chars(50); + _importViaInternal = Gtk::manage(new class Gtk::RadioButton(group,_("Internal import"))); + _labelViaInternal = Gtk::manage(new class Gtk::Label(_("Import via internal (Poppler derived) library. Text is stored as text but white space is missing. Meshes are converted to tiles, the number depends on the precision set below."))); + _labelViaInternal->set_max_width_chars(50); +#endif + + _fallbackPrecisionSlider_adj = Gtk::Adjustment::create(2, 1, 256, 1, 10, 10); + _fallbackPrecisionSlider = Gtk::manage(new class Gtk::Scale(_fallbackPrecisionSlider_adj)); + _fallbackPrecisionSlider->set_value(2.0); + _labelPrecisionComment = Gtk::manage(new class Gtk::Label(_("rough"))); + hbox6 = Gtk::manage(new class Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 4)); + + // Text options + // _labelText = Gtk::manage(new class Gtk::Label(_("Text handling:"))); + // _textHandlingCombo = Gtk::manage(new class Gtk::ComboBoxText()); + // _textHandlingCombo->append(_("Import text as text")); + // _textHandlingCombo->set_active_text(_("Import text as text")); + // hbox5 = Gtk::manage(new class Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 4)); + + // Font option + _localFontsCheck = Gtk::manage(new class Gtk::CheckButton(_("Replace PDF fonts by closest-named installed fonts"))); + + _embedImagesCheck = Gtk::manage(new class Gtk::CheckButton(_("Embed images"))); + vbox3 = Gtk::manage(new class Gtk::Box(Gtk::ORIENTATION_VERTICAL, 4)); + _importSettingsFrame = Gtk::manage(new class Inkscape::UI::Widget::Frame(_("Import settings"))); + vbox1 = Gtk::manage(new class Gtk::Box(Gtk::ORIENTATION_VERTICAL, 4)); + _previewArea = Gtk::manage(new class Gtk::DrawingArea()); + hbox1 = Gtk::manage(new class Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 4)); + cancelbutton->set_can_focus(); + cancelbutton->set_can_default(); + cancelbutton->set_relief(Gtk::RELIEF_NORMAL); + okbutton->set_can_focus(); + okbutton->set_can_default(); + okbutton->set_relief(Gtk::RELIEF_NORMAL); + + _labelSelect->set_xalign(0.5); + _labelSelect->set_yalign(0.5); + _labelTotalPages->set_xalign(0.5); + _labelTotalPages->set_yalign(0.5); + _labelPrecision->set_xalign(0.0); + _labelPrecision->set_yalign(0.5); + _labelPrecisionWarning->set_xalign(0.0); + _labelPrecisionWarning->set_yalign(0.5); + _labelPrecisionComment->set_xalign(0.5); + _labelPrecisionComment->set_yalign(0.5); + + _labelSelect->set_margin_start(4); + _labelSelect->set_margin_end(4); + _labelTotalPages->set_margin_start(4); + _labelTotalPages->set_margin_end(4); + _labelPrecision->set_margin_start(4); + _labelPrecision->set_margin_end(4); + _labelPrecisionWarning->set_margin_start(4); + _labelPrecisionWarning->set_margin_end(4); + _labelPrecisionComment->set_margin_start(4); + _labelPrecisionComment->set_margin_end(4); + + _labelSelect->set_justify(Gtk::JUSTIFY_LEFT); + _labelSelect->set_line_wrap(false); + _labelSelect->set_use_markup(false); + _labelSelect->set_selectable(false); + _pageAllPages->set_can_focus(); + _pageAllPages->set_relief(Gtk::RELIEF_NORMAL); + _pageAllPages->set_mode(true); + _pageAllPages->set_active(true); + _pageNumberSpin->set_can_focus(); + _pageNumberSpin->set_update_policy(Gtk::UPDATE_ALWAYS); + _pageNumberSpin->set_numeric(true); + _pageNumberSpin->set_digits(0); + _pageNumberSpin->set_wrap(false); + _labelTotalPages->set_justify(Gtk::JUSTIFY_LEFT); + _labelTotalPages->set_line_wrap(false); + _labelTotalPages->set_use_markup(false); + _labelTotalPages->set_selectable(false); + hbox2->pack_start(*_pageAllPages, Gtk::PACK_SHRINK, 4); + hbox2->pack_start(*_labelSelect, Gtk::PACK_SHRINK, 4); + hbox2->pack_start(*_pageNumberSpin, Gtk::PACK_SHRINK, 4); + hbox2->pack_start(*_labelTotalPages, Gtk::PACK_SHRINK, 4); + _cropCheck->set_can_focus(); + _cropCheck->set_relief(Gtk::RELIEF_NORMAL); + _cropCheck->set_mode(true); + _cropCheck->set_active(false); + _cropTypeCombo->set_border_width(1); + hbox3->pack_start(*_cropCheck, Gtk::PACK_SHRINK, 4); + hbox3->pack_start(*_cropTypeCombo, Gtk::PACK_SHRINK, 0); + vbox2->pack_start(*hbox2); + vbox2->pack_start(*hbox3); + _pageSettingsFrame->add(*vbox2); + _pageSettingsFrame->set_border_width(4); + _labelPrecision->set_justify(Gtk::JUSTIFY_LEFT); + _labelPrecision->set_line_wrap(true); + _labelPrecision->set_use_markup(false); + _labelPrecision->set_selectable(false); + _labelPrecisionWarning->set_justify(Gtk::JUSTIFY_LEFT); + _labelPrecisionWarning->set_line_wrap(true); + _labelPrecisionWarning->set_use_markup(true); + _labelPrecisionWarning->set_selectable(false); + +#ifdef HAVE_POPPLER_CAIRO + _importViaPoppler->set_can_focus(); + _importViaPoppler->set_relief(Gtk::RELIEF_NORMAL); + _importViaPoppler->set_mode(true); + _importViaPoppler->set_active(false); + _importViaInternal->set_can_focus(); + _importViaInternal->set_relief(Gtk::RELIEF_NORMAL); + _importViaInternal->set_mode(true); + _importViaInternal->set_active(true); + _labelViaPoppler->set_line_wrap(true); + _labelViaInternal->set_line_wrap(true); + _labelViaPoppler->set_xalign(0); + _labelViaInternal->set_xalign(0); +#endif + + _fallbackPrecisionSlider->set_size_request(180,-1); + _fallbackPrecisionSlider->set_can_focus(); + _fallbackPrecisionSlider->set_inverted(false); + _fallbackPrecisionSlider->set_digits(1); + _fallbackPrecisionSlider->set_draw_value(true); + _fallbackPrecisionSlider->set_value_pos(Gtk::POS_TOP); + _labelPrecisionComment->set_size_request(90,-1); + _labelPrecisionComment->set_justify(Gtk::JUSTIFY_LEFT); + _labelPrecisionComment->set_line_wrap(false); + _labelPrecisionComment->set_use_markup(false); + _labelPrecisionComment->set_selectable(false); + hbox6->pack_start(*_fallbackPrecisionSlider, Gtk::PACK_SHRINK, 4); + hbox6->pack_start(*_labelPrecisionComment, Gtk::PACK_SHRINK, 0); + // _labelText->set_alignment(0.5,0.5); + // _labelText->set_padding(4,0); + // _labelText->set_justify(Gtk::JUSTIFY_LEFT); + // _labelText->set_line_wrap(false); + // _labelText->set_use_markup(false); + // _labelText->set_selectable(false); + // hbox5->pack_start(*_labelText, Gtk::PACK_SHRINK, 0); + // hbox5->pack_start(*_textHandlingCombo, Gtk::PACK_SHRINK, 0); + _localFontsCheck->set_can_focus(); + _localFontsCheck->set_relief(Gtk::RELIEF_NORMAL); + _localFontsCheck->set_mode(true); + _localFontsCheck->set_active(true); + _embedImagesCheck->set_can_focus(); + _embedImagesCheck->set_relief(Gtk::RELIEF_NORMAL); + _embedImagesCheck->set_mode(true); + _embedImagesCheck->set_active(true); +#ifdef HAVE_POPPLER_CAIRO + vbox3->pack_start(*_importViaPoppler, Gtk::PACK_SHRINK, 0); + vbox3->pack_start(*_labelViaPoppler, Gtk::PACK_SHRINK, 0); + vbox3->pack_start(*_importViaInternal, Gtk::PACK_SHRINK, 0); + vbox3->pack_start(*_labelViaInternal, Gtk::PACK_SHRINK, 0); +#endif + vbox3->pack_start(*_localFontsCheck, Gtk::PACK_SHRINK, 0); + vbox3->pack_start(*_embedImagesCheck, Gtk::PACK_SHRINK, 0); + vbox3->pack_start(*_labelPrecision, Gtk::PACK_SHRINK, 0); + vbox3->pack_start(*hbox6, Gtk::PACK_SHRINK, 0); + vbox3->pack_start(*_labelPrecisionWarning, Gtk::PACK_SHRINK, 0); + // vbox3->pack_start(*hbox5, Gtk::PACK_SHRINK, 4); + _importSettingsFrame->add(*vbox3); + _importSettingsFrame->set_border_width(4); + vbox1->pack_start(*_pageSettingsFrame, Gtk::PACK_SHRINK, 0); + vbox1->pack_start(*_importSettingsFrame, Gtk::PACK_SHRINK, 0); + hbox1->pack_start(*vbox1); + hbox1->pack_start(*_previewArea, Gtk::PACK_SHRINK, 4); + + get_content_area()->set_homogeneous(false); + get_content_area()->set_spacing(0); + get_content_area()->pack_start(*hbox1); + + 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(*cancelbutton, -6); + this->add_action_widget(*okbutton, -5); + + this->show_all(); + + // Connect signals + _previewArea->signal_draw().connect(sigc::mem_fun(*this, &PdfImportDialog::_onDraw)); + _pageAllPages->signal_toggled().connect(sigc::mem_fun(*this, &PdfImportDialog::_onToggleAllPages)); + _pageNumberSpin_adj->signal_value_changed().connect(sigc::mem_fun(*this, &PdfImportDialog::_onPageNumberChanged)); + _cropCheck->signal_toggled().connect(sigc::mem_fun(*this, &PdfImportDialog::_onToggleCropping)); + _fallbackPrecisionSlider_adj->signal_value_changed().connect(sigc::mem_fun(*this, &PdfImportDialog::_onPrecisionChanged)); +#ifdef HAVE_POPPLER_CAIRO + _importViaPoppler->signal_toggled().connect(sigc::mem_fun(*this, &PdfImportDialog::_onToggleImport)); +#endif + + _render_thumb = false; +#ifdef HAVE_POPPLER_CAIRO + _cairo_surface = NULL; + _render_thumb = true; + + // 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); + } + + // Set sensitivity of some widgets based on selected import type. + _onToggleImport(); +#endif + + // Set default preview size + _preview_width = 200; + _preview_height = 300; + + // Init preview + _thumb_data = nullptr; + _pageNumberSpin_adj->set_value(1.0); + _current_page = -1; + _setPreviewPage(1); + + set_default (*okbutton); + set_focus (*okbutton); +} + +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; + } +} + +int PdfImportDialog::getSelectedPage() { + return _current_page; +} + +bool PdfImportDialog::getImportMethod() { +#ifdef HAVE_POPPLER_CAIRO + return _importViaPoppler->get_active(); +#else + return false; +#endif +} + +/** + * \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->setAttributeSvgDouble("selectedPage", (double)_current_page); + if (_cropCheck->get_active()) { + Glib::ustring current_choice = _cropTypeCombo->get_active_text(); + int num_crop_choices = sizeof(crop_setting_choices) / sizeof(crop_setting_choices[0]); + int i = 0; + for ( ; i < num_crop_choices ; i++ ) { + if ( current_choice == _(crop_setting_choices[i]) ) { + break; + } + } + prefs->setAttributeSvgDouble("cropTo", (double)i); + } else { + prefs->setAttributeSvgDouble("cropTo", -1.0); + } + prefs->setAttributeSvgDouble("approximationPrecision", _fallbackPrecisionSlider->get_value()); + if (_localFontsCheck->get_active()) { + prefs->setAttribute("localFonts", "1"); + } else { + prefs->setAttribute("localFonts", "0"); + } + if (_embedImagesCheck->get_active()) { + prefs->setAttribute("embedImages", "1"); + } else { + prefs->setAttribute("embedImages", "0"); + } +#ifdef HAVE_POPPLER_CAIRO + if (_importViaPoppler->get_active()) { + prefs->setAttribute("importviapoppler", "1"); + } else { + prefs->setAttribute("importviapoppler", "0"); + } +#endif +} + +/** + * \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 precision_comments[] = { + 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")) + }; + + double min = _fallbackPrecisionSlider_adj->get_lower(); + double max = _fallbackPrecisionSlider_adj->get_upper(); + int num_intervals = sizeof(precision_comments) / sizeof(precision_comments[0]); + double interval_len = ( max - min ) / (double)num_intervals; + double value = _fallbackPrecisionSlider_adj->get_value(); + int comment_idx = (int)floor( ( value - min ) / interval_len ); + _labelPrecisionComment->set_label(precision_comments[comment_idx]); +} + +void PdfImportDialog::_onToggleAllPages() { + if (_pageAllPages->get_active()) { + _pageNumberSpin->set_sensitive(false); + _current_page = -1; + _setPreviewPage(1); + } else { + _pageNumberSpin->set_sensitive(true); + _onPageNumberChanged(); + } +} + +void PdfImportDialog::_onToggleCropping() { + _cropTypeCombo->set_sensitive(_cropCheck->get_active()); +} + +void PdfImportDialog::_onPageNumberChanged() { + int page = _pageNumberSpin->get_value_as_int(); + _current_page = CLAMP(page, 1, _pdf_doc->getCatalog()->getNumPages()); + _setPreviewPage(_current_page); +} + +#ifdef HAVE_POPPLER_CAIRO +void PdfImportDialog::_onToggleImport() { + if( _importViaPoppler->get_active() ) { + hbox3->set_sensitive(false); + _localFontsCheck->set_sensitive(false); + _embedImagesCheck->set_sensitive(false); + hbox6->set_sensitive(false); + _pageAllPages->set_sensitive(false); + _pageAllPages->set_active(false); + } else { + hbox3->set_sensitive(); + _localFontsCheck->set_sensitive(); + _embedImagesCheck->set_sensitive(); + hbox6->set_sensitive(); + _pageAllPages->set_sensitive(true); + _pageAllPages->set_active(true); + } +} +#endif + + +#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(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& cr) { + // Check if we have a thumbnail at all + if (!_thumb_data) { + return true; + } + + // Create the pixbuf for the thumbnail + Glib::RefPtr 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); + // 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 + _previewArea->set_size_request(_thumb_width, _thumb_height + 20); + _previewArea->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(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 + _previewArea->set_size_request(_preview_width, _preview_height); + _previewArea->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(closure); + stream->append(reinterpret_cast(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 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 dlg; + if (INKSCAPE.use_gui()) { + dlg = std::make_unique(pdf_doc, uri); + if (!dlg->showDialog()) { + throw Input::open_cancelled(); + } + } + + // Get options + int page_num = 1; + bool is_importvia_poppler = false; + if (dlg) { + page_num = dlg->getSelectedPage(); +#ifdef HAVE_POPPLER_CAIRO + is_importvia_poppler = dlg->getImportMethod(); + // printf("PDF import via %s.\n", is_importvia_poppler ? "poppler" : "native"); +#endif + } else { + page_num = INKSCAPE.get_pdf_page(); +#ifdef HAVE_POPPLER_CAIRO + is_importvia_poppler = INKSCAPE.get_pdf_poppler(); +#endif + } + + // Create Inkscape document from file + SPDocument *doc = nullptr; + bool saved = false; + if(!is_importvia_poppler) + { + // 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()); + + // Get preferences + Inkscape::XML::Node *prefs = builder->getPreferences(); + if (dlg) + dlg->getImportSettings(prefs); + + if (page_num > 0) { + add_builder_page(pdf_doc, builder, doc, page_num); + } else { + // Multi page (open all pages) + Catalog *catalog = pdf_doc->getCatalog(); + for (int p = 1; p <= catalog->getNumPages(); p++) { + // Incriment the page building here. + builder->pushPage(); + // And then add each of the pages + add_builder_page(pdf_doc, builder, doc, p); + } + } + + delete builder; + g_free(docname); + } + else + { +#ifdef HAVE_POPPLER_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); + PopplerPage* page = nullptr; + + if(error != NULL) { + std::cerr << "PDFInput::open: error opening document: " << full_uri << std::endl; + g_error_free (error); + } + + if (document) { + int const num_pages = poppler_document_get_n_pages(document); + sanitize_page_number(page_num, num_pages); + page = poppler_document_get_page(document, page_num - 1); + } + + if (page) { + 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); + } else if (document) { + std::cerr << "PDFInput::open: error opening page " << page_num << " of document: " << full_uri << std::endl; + } + + // Cleanup + if (document) { + g_object_unref(G_OBJECT(document)); + if (page) { + g_object_unref(G_OBJECT(page)); + } + } + + 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_ptrpdf_doc, SvgBuilder *builder, SPDocument *doc, int page_num) +{ + // native importer + Catalog *catalog = pdf_doc->getCatalog(); + + int const num_pages = catalog->getNumPages(); + Inkscape::XML::Node *prefs = builder->getPreferences(); + + // Check page exists + sanitize_page_number(page_num, num_pages); + 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; + double crop_setting = prefs->getAttributeDouble("cropTo", -1.0); + + if (crop_setting >= 0.0) { // Do page clipping + int crop_choice = (int)crop_setting; + switch (crop_choice) { + case 0: // Media box + clipToBox = page->getMediaBox(); + break; + case 1: // Crop box + clipToBox = page->getCropBox(); + break; + case 2: // Bleed box + clipToBox = page->getBleedBox(); + break; + case 3: // Trim box + clipToBox = page->getTrimBox(); + 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->getXRef(), builder, page_num-1, page->getRotate(), + page->getResourceDict(), page->getCropBox(), 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( + "\n" + "" N_("PDF Input") "\n" + "org.inkscape.input.pdf\n" + "\n" + ".pdf\n" + "application/pdf\n" + "" N_("Portable Document Format (*.pdf)") "\n" + "" N_("Portable Document Format") "\n" + "\n" + "", new PdfInput()); + // clang-format on + + /* AI in */ + // clang-format off + Inkscape::Extension::build_from_mem( + "\n" + "" N_("AI Input") "\n" + "org.inkscape.input.ai\n" + "\n" + ".ai\n" + "image/x-adobe-illustrator\n" + "" N_("Adobe Illustrator 9.0 and above (*.ai)") "\n" + "" N_("Open files saved in Adobe Illustrator 9.0 and newer versions") "\n" + "\n" + "", 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 : diff --git a/src/extension/internal/pdfinput/pdf-input.h b/src/extension/internal/pdfinput/pdf-input.h new file mode 100644 index 0000000..fd97277 --- /dev/null +++ b/src/extension/internal/pdfinput/pdf-input.h @@ -0,0 +1,170 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#ifndef SEEN_EXTENSION_INTERNAL_PDFINPUT_H +#define SEEN_EXTENSION_INTERNAL_PDFINPUT_H + +/* + * Authors: + * miklos erdelyi + * + * 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 + +#ifdef HAVE_POPPLER +#include "poppler-transition-api.h" + +#include + +#include "../../implementation/implementation.h" +#include "svg-builder.h" + +#ifdef HAVE_POPPLER_CAIRO +struct _PopplerDocument; +typedef struct _PopplerDocument PopplerDocument; +#endif + +struct _GdkEventExpose; +typedef _GdkEventExpose GdkEventExpose; + +class Page; +class PDFDoc; + +namespace Gtk { + class Button; + class CheckButton; + class ComboBoxText; + class DrawingArea; + class Frame; + class Scale; + class RadioButton; + class Box; + class Label; +} + +namespace Inkscape { + +namespace UI { +namespace Widget { + class SpinButton; + class Frame; +} +} + +namespace Extension { +namespace Internal { + +/** + * PDF import using libpoppler. + */ +class PdfImportDialog : public Gtk::Dialog +{ +public: + PdfImportDialog(std::shared_ptr doc, const gchar *uri); + ~PdfImportDialog() override; + + bool showDialog(); + int getSelectedPage(); + bool getImportMethod(); + void getImportSettings(Inkscape::XML::Node *prefs); + +private: + void _setPreviewPage(int page); + + // Signal handlers + bool _onDraw(const Cairo::RefPtr& cr); + void _onPageNumberChanged(); + void _onToggleAllPages(); + void _onToggleCropping(); + void _onPrecisionChanged(); +#ifdef HAVE_POPPLER_CAIRO + void _onToggleImport(); +#endif + + class Gtk::Button * cancelbutton; + class Gtk::Button * okbutton; + class Gtk::Label * _labelSelect; + class Gtk::CheckButton *_pageAllPages; + class Inkscape::UI::Widget::SpinButton * _pageNumberSpin; + class Gtk::Label * _labelTotalPages; + class Gtk::Box * hbox2; + class Gtk::CheckButton * _cropCheck; + class Gtk::ComboBoxText * _cropTypeCombo; + class Gtk::Box * hbox3; + class Gtk::Box * vbox2; + class Inkscape::UI::Widget::Frame * _pageSettingsFrame; + class Gtk::Label * _labelPrecision; + class Gtk::Label * _labelPrecisionWarning; +#ifdef HAVE_POPPLER_CAIRO + class Gtk::RadioButton * _importViaPoppler; // Use poppler_cairo importing + class Gtk::Label * _labelViaPoppler; + class Gtk::RadioButton * _importViaInternal; // Use native (poppler based) importing + class Gtk::Label * _labelViaInternal; +#endif + Gtk::Scale * _fallbackPrecisionSlider; + Glib::RefPtr _fallbackPrecisionSlider_adj; + class Gtk::Label * _labelPrecisionComment; + class Gtk::Box * hbox6; +#if 0 + class Gtk::Label * _labelText; + class Gtk::ComboBoxText * _textHandlingCombo; + class Gtk::Box * hbox5; +#endif + class Gtk::CheckButton * _localFontsCheck; + class Gtk::CheckButton * _embedImagesCheck; + class Gtk::Box * vbox3; + class Inkscape::UI::Widget::Frame * _importSettingsFrame; + class Gtk::Box * vbox1; + class Gtk::DrawingArea * _previewArea; + class Gtk::Box * hbox1; + + std::shared_ptr _pdf_doc; // Document to be imported + int _current_page; // Current selected page + Page *_previewed_page; // Currently previewed page + unsigned char *_thumb_data; // Thumbnail image data + int _thumb_width, _thumb_height; // Thumbnail size + int _thumb_rowstride; + int _preview_width, _preview_height; // Size of the preview area + bool _render_thumb; // Whether we can/shall render thumbnails +#ifdef HAVE_POPPLER_CAIRO + cairo_surface_t *_cairo_surface; + PopplerDocument *_poppler_doc; +#endif +}; + + +class PdfInput: public Inkscape::Extension::Implementation::Implementation { + PdfInput () = default;; +public: + SPDocument *open( Inkscape::Extension::Input *mod, + const gchar *uri ) override; + static void init( ); +private: + void add_builder_page( + std::shared_ptr pdf_doc, + SvgBuilder *builder, SPDocument *doc, + int page_num); +}; + +} // namespace Implementation +} // namespace Extension +} // namespace Inkscape + +#endif // HAVE_POPPLER + +#endif // SEEN_EXTENSION_INTERNAL_PDFINPUT_H + +/* + 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 : diff --git a/src/extension/internal/pdfinput/pdf-parser.cpp b/src/extension/internal/pdfinput/pdf-parser.cpp new file mode 100644 index 0000000..d32a7fa --- /dev/null +++ b/src/extension/internal/pdfinput/pdf-parser.cpp @@ -0,0 +1,3368 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * PDF parsing using libpoppler. + *//* + * Authors: + * Derived from poppler's Gfx.cc, which was derived from Xpdf by 1996-2003 Glyph & Cog, LLC + * Jon A. Cruz + * + * Copyright (C) 2018 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 + +#ifdef HAVE_POPPLER + +#ifdef USE_GCC_PRAGMAS +#pragma implementation +#endif + +#include +#include +#include +#include +#include + +#include "svg-builder.h" +#include "Gfx.h" +#include "pdf-parser.h" +#include "util/units.h" +#include "poppler-transition-api.h" + +#include "glib/poppler-features.h" +#include "goo/gmem.h" +#include "goo/GooString.h" +#include "GlobalParams.h" +#include "CharTypes.h" +#include "Object.h" +#include "Array.h" +#include "Dict.h" +#include "Stream.h" +#include "Lexer.h" +#include "Parser.h" +#include "GfxFont.h" +#include "GfxState.h" +#include "OutputDev.h" +#include "Page.h" +#include "Annot.h" +#include "Error.h" + +// the MSVC math.h doesn't define this +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + +//------------------------------------------------------------------------ +// constants +//------------------------------------------------------------------------ + +// Default max delta allowed in any color component for a shading fill. +#define defaultShadingColorDelta (dblToCol( 1 / 2.0 )) + +// Default max recursive depth for a shading fill. +#define defaultShadingMaxDepth 6 + +// Max number of operators kept in the history list. +#define maxOperatorHistoryDepth 16 + +//------------------------------------------------------------------------ +// Operator table +//------------------------------------------------------------------------ + +PdfOperator PdfParser::opTab[] = { + {"\"", 3, {tchkNum, tchkNum, tchkString}, + &PdfParser::opMoveSetShowText}, + {"'", 1, {tchkString}, + &PdfParser::opMoveShowText}, + {"B", 0, {tchkNone}, + &PdfParser::opFillStroke}, + {"B*", 0, {tchkNone}, + &PdfParser::opEOFillStroke}, + {"BDC", 2, {tchkName, tchkProps}, + &PdfParser::opBeginMarkedContent}, + {"BI", 0, {tchkNone}, + &PdfParser::opBeginImage}, + {"BMC", 1, {tchkName}, + &PdfParser::opBeginMarkedContent}, + {"BT", 0, {tchkNone}, + &PdfParser::opBeginText}, + {"BX", 0, {tchkNone}, + &PdfParser::opBeginIgnoreUndef}, + {"CS", 1, {tchkName}, + &PdfParser::opSetStrokeColorSpace}, + {"DP", 2, {tchkName, tchkProps}, + &PdfParser::opMarkPoint}, + {"Do", 1, {tchkName}, + &PdfParser::opXObject}, + {"EI", 0, {tchkNone}, + &PdfParser::opEndImage}, + {"EMC", 0, {tchkNone}, + &PdfParser::opEndMarkedContent}, + {"ET", 0, {tchkNone}, + &PdfParser::opEndText}, + {"EX", 0, {tchkNone}, + &PdfParser::opEndIgnoreUndef}, + {"F", 0, {tchkNone}, + &PdfParser::opFill}, + {"G", 1, {tchkNum}, + &PdfParser::opSetStrokeGray}, + {"ID", 0, {tchkNone}, + &PdfParser::opImageData}, + {"J", 1, {tchkInt}, + &PdfParser::opSetLineCap}, + {"K", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, + &PdfParser::opSetStrokeCMYKColor}, + {"M", 1, {tchkNum}, + &PdfParser::opSetMiterLimit}, + {"MP", 1, {tchkName}, + &PdfParser::opMarkPoint}, + {"Q", 0, {tchkNone}, + &PdfParser::opRestore}, + {"RG", 3, {tchkNum, tchkNum, tchkNum}, + &PdfParser::opSetStrokeRGBColor}, + {"S", 0, {tchkNone}, + &PdfParser::opStroke}, + {"SC", -4, {tchkNum, tchkNum, tchkNum, tchkNum}, + &PdfParser::opSetStrokeColor}, + {"SCN", -33, {tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN,}, + &PdfParser::opSetStrokeColorN}, + {"T*", 0, {tchkNone}, + &PdfParser::opTextNextLine}, + {"TD", 2, {tchkNum, tchkNum}, + &PdfParser::opTextMoveSet}, + {"TJ", 1, {tchkArray}, + &PdfParser::opShowSpaceText}, + {"TL", 1, {tchkNum}, + &PdfParser::opSetTextLeading}, + {"Tc", 1, {tchkNum}, + &PdfParser::opSetCharSpacing}, + {"Td", 2, {tchkNum, tchkNum}, + &PdfParser::opTextMove}, + {"Tf", 2, {tchkName, tchkNum}, + &PdfParser::opSetFont}, + {"Tj", 1, {tchkString}, + &PdfParser::opShowText}, + {"Tm", 6, {tchkNum, tchkNum, tchkNum, tchkNum, + tchkNum, tchkNum}, + &PdfParser::opSetTextMatrix}, + {"Tr", 1, {tchkInt}, + &PdfParser::opSetTextRender}, + {"Ts", 1, {tchkNum}, + &PdfParser::opSetTextRise}, + {"Tw", 1, {tchkNum}, + &PdfParser::opSetWordSpacing}, + {"Tz", 1, {tchkNum}, + &PdfParser::opSetHorizScaling}, + {"W", 0, {tchkNone}, + &PdfParser::opClip}, + {"W*", 0, {tchkNone}, + &PdfParser::opEOClip}, + {"b", 0, {tchkNone}, + &PdfParser::opCloseFillStroke}, + {"b*", 0, {tchkNone}, + &PdfParser::opCloseEOFillStroke}, + {"c", 6, {tchkNum, tchkNum, tchkNum, tchkNum, + tchkNum, tchkNum}, + &PdfParser::opCurveTo}, + {"cm", 6, {tchkNum, tchkNum, tchkNum, tchkNum, + tchkNum, tchkNum}, + &PdfParser::opConcat}, + {"cs", 1, {tchkName}, + &PdfParser::opSetFillColorSpace}, + {"d", 2, {tchkArray, tchkNum}, + &PdfParser::opSetDash}, + {"d0", 2, {tchkNum, tchkNum}, + &PdfParser::opSetCharWidth}, + {"d1", 6, {tchkNum, tchkNum, tchkNum, tchkNum, + tchkNum, tchkNum}, + &PdfParser::opSetCacheDevice}, + {"f", 0, {tchkNone}, + &PdfParser::opFill}, + {"f*", 0, {tchkNone}, + &PdfParser::opEOFill}, + {"g", 1, {tchkNum}, + &PdfParser::opSetFillGray}, + {"gs", 1, {tchkName}, + &PdfParser::opSetExtGState}, + {"h", 0, {tchkNone}, + &PdfParser::opClosePath}, + {"i", 1, {tchkNum}, + &PdfParser::opSetFlat}, + {"j", 1, {tchkInt}, + &PdfParser::opSetLineJoin}, + {"k", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, + &PdfParser::opSetFillCMYKColor}, + {"l", 2, {tchkNum, tchkNum}, + &PdfParser::opLineTo}, + {"m", 2, {tchkNum, tchkNum}, + &PdfParser::opMoveTo}, + {"n", 0, {tchkNone}, + &PdfParser::opEndPath}, + {"q", 0, {tchkNone}, + &PdfParser::opSave}, + {"re", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, + &PdfParser::opRectangle}, + {"rg", 3, {tchkNum, tchkNum, tchkNum}, + &PdfParser::opSetFillRGBColor}, + {"ri", 1, {tchkName}, + &PdfParser::opSetRenderingIntent}, + {"s", 0, {tchkNone}, + &PdfParser::opCloseStroke}, + {"sc", -4, {tchkNum, tchkNum, tchkNum, tchkNum}, + &PdfParser::opSetFillColor}, + {"scn", -33, {tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN, tchkSCN, tchkSCN, tchkSCN, + tchkSCN,}, + &PdfParser::opSetFillColorN}, + {"sh", 1, {tchkName}, + &PdfParser::opShFill}, + {"v", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, + &PdfParser::opCurveTo1}, + {"w", 1, {tchkNum}, + &PdfParser::opSetLineWidth}, + {"y", 4, {tchkNum, tchkNum, tchkNum, tchkNum}, + &PdfParser::opCurveTo2} +}; + +#define numOps (sizeof(opTab) / sizeof(PdfOperator)) + +namespace { + +GfxPatch blankPatch() +{ + GfxPatch patch; + memset(&patch, 0, sizeof(patch)); // quick-n-dirty + return patch; +} + +} // namespace + +//------------------------------------------------------------------------ +// ClipHistoryEntry +//------------------------------------------------------------------------ + +class ClipHistoryEntry { +public: + + ClipHistoryEntry(GfxPath *clipPath = nullptr, GfxClipType clipType = clipNormal); + virtual ~ClipHistoryEntry(); + + // Manipulate clip path stack + ClipHistoryEntry *save(); + ClipHistoryEntry *restore(); + GBool hasSaves() { return saved != nullptr; } + void setClip(_POPPLER_CONST_83 GfxPath *newClipPath, GfxClipType newClipType = clipNormal); + GfxPath *getClipPath() { return clipPath; } + GfxClipType getClipType() { return clipType; } + +private: + + ClipHistoryEntry *saved; // next clip path on stack + + GfxPath *clipPath; // used as the path to be filled for an 'sh' operator + GfxClipType clipType; + + ClipHistoryEntry(ClipHistoryEntry *other); +}; + +//------------------------------------------------------------------------ +// PdfParser +//------------------------------------------------------------------------ + +PdfParser::PdfParser(XRef *xrefA, + Inkscape::Extension::Internal::SvgBuilder *builderA, + int /*pageNum*/, + int rotate, + Dict *resDict, + _POPPLER_CONST PDFRectangle *box, + _POPPLER_CONST PDFRectangle *cropBox) : + xref(xrefA), + builder(builderA), + subPage(gFalse), + printCommands(false), + res(new GfxResources(xref, resDict, nullptr)), // start the resource stack + state(new GfxState(72.0, 72.0, box, rotate, gTrue)), + fontChanged(gFalse), + clip(clipNone), + ignoreUndef(0), + baseMatrix(), + formDepth(0), + parser(nullptr), + colorDeltas(), + maxDepths(), + clipHistory(new ClipHistoryEntry()), + operatorHistory(nullptr) +{ + setDefaultApproximationPrecision(); + builder->setDocumentSize(Inkscape::Util::Quantity::convert(state->getPageWidth(), "pt", "px"), + Inkscape::Util::Quantity::convert(state->getPageHeight(), "pt", "px")); + + const double *ctm = state->getCTM(); + double scaledCTM[6]; + for (int i = 0; i < 6; ++i) { + baseMatrix[i] = ctm[i]; + scaledCTM[i] = Inkscape::Util::Quantity::convert(ctm[i], "pt", "px"); + } + saveState(); + builder->setTransform((double*)&scaledCTM); + formDepth = 0; + + // set crop box + if (cropBox) { + if (printCommands) + printf("cropBox: %f %f %f %f\n", cropBox->x1, cropBox->y1, cropBox->x2, cropBox->y2); + // do not clip if it's not needed + if (cropBox->x1 != 0.0 || cropBox->y1 != 0.0 || + cropBox->x2 != state->getPageWidth() || cropBox->y2 != state->getPageHeight()) { + + state->moveTo(cropBox->x1, cropBox->y1); + state->lineTo(cropBox->x2, cropBox->y1); + state->lineTo(cropBox->x2, cropBox->y2); + state->lineTo(cropBox->x1, cropBox->y2); + state->closePath(); + state->clip(); + clipHistory->setClip(state->getPath(), clipNormal); + builder->setClipPath(state); + state->clearPath(); + } + } + pushOperator("startPage"); +} + +PdfParser::PdfParser(XRef *xrefA, + Inkscape::Extension::Internal::SvgBuilder *builderA, + Dict *resDict, + _POPPLER_CONST PDFRectangle *box) : + xref(xrefA), + builder(builderA), + subPage(gTrue), + printCommands(false), + res(new GfxResources(xref, resDict, nullptr)), // start the resource stack + state(new GfxState(72, 72, box, 0, gFalse)), + fontChanged(gFalse), + clip(clipNone), + ignoreUndef(0), + baseMatrix(), + formDepth(0), + parser(nullptr), + colorDeltas(), + maxDepths(), + clipHistory(new ClipHistoryEntry()), + operatorHistory(nullptr) +{ + setDefaultApproximationPrecision(); + + for (int i = 0; i < 6; ++i) { + baseMatrix[i] = state->getCTM()[i]; + } + formDepth = 0; +} + +PdfParser::~PdfParser() { + while(operatorHistory) { + OpHistoryEntry *tmp = operatorHistory->next; + delete operatorHistory; + operatorHistory = tmp; + } + + while (state && state->hasSaves()) { + restoreState(); + } + + if (!subPage) { + //out->endPage(); + } + + while (res) { + popResources(); + } + + if (state) { + delete state; + state = nullptr; + } + + if (clipHistory) { + delete clipHistory; + clipHistory = nullptr; + } +} + +void PdfParser::parse(Object *obj, GBool topLevel) { + Object obj2; + + if (obj->isArray()) { + for (int i = 0; i < obj->arrayGetLength(); ++i) { + _POPPLER_CALL_ARGS(obj2, obj->arrayGet, i); + if (!obj2.isStream()) { + error(errInternal, -1, "Weird page contents"); + _POPPLER_FREE(obj2); + return; + } + _POPPLER_FREE(obj2); + } + } else if (!obj->isStream()) { + error(errInternal, -1, "Weird page contents"); + return; + } + parser = new _POPPLER_NEW_PARSER(xref, obj); + go(topLevel); + delete parser; + parser = nullptr; +} + +void PdfParser::go(GBool /*topLevel*/) +{ + Object obj; + Object args[maxArgs]; + + // scan a sequence of objects + int numArgs = 0; + _POPPLER_CALL(obj, parser->getObj); + while (!obj.isEOF()) { + + // got a command - execute it + if (obj.isCmd()) { + if (printCommands) { + obj.print(stdout); + for (int i = 0; i < numArgs; ++i) { + printf(" "); + args[i].print(stdout); + } + printf("\n"); + fflush(stdout); + } + + // Run the operation + execOp(&obj, args, numArgs); + +#if !defined(POPPLER_NEW_OBJECT_API) + _POPPLER_FREE(obj); + for (int i = 0; i < numArgs; ++i) + _POPPLER_FREE(args[i]); +#endif + numArgs = 0; + + // got an argument - save it + } else if (numArgs < maxArgs) { + args[numArgs++] = std::move(obj); + + // too many arguments - something is wrong + } else { + error(errSyntaxError, getPos(), "Too many args in content stream"); + if (printCommands) { + printf("throwing away arg: "); + obj.print(stdout); + printf("\n"); + fflush(stdout); + } + _POPPLER_FREE(obj); + } + + // grab the next object + _POPPLER_CALL(obj, parser->getObj); + } + _POPPLER_FREE(obj); + + // args at end with no command + if (numArgs > 0) { + error(errSyntaxError, getPos(), "Leftover args in content stream"); + if (printCommands) { + printf("%d leftovers:", numArgs); + for (int i = 0; i < numArgs; ++i) { + printf(" "); + args[i].print(stdout); + } + printf("\n"); + fflush(stdout); + } +#if !defined(POPPLER_NEW_OBJECT_API) + for (int i = 0; i < numArgs; ++i) + _POPPLER_FREE(args[i]); +#endif + } +} + +void PdfParser::pushOperator(const char *name) +{ + OpHistoryEntry *newEntry = new OpHistoryEntry; + newEntry->name = name; + newEntry->state = nullptr; + newEntry->depth = (operatorHistory != nullptr ? (operatorHistory->depth+1) : 0); + newEntry->next = operatorHistory; + operatorHistory = newEntry; + + // Truncate list if needed + if (operatorHistory->depth > maxOperatorHistoryDepth) { + OpHistoryEntry *curr = operatorHistory; + OpHistoryEntry *prev = nullptr; + while (curr && curr->next != nullptr) { + curr->depth--; + prev = curr; + curr = curr->next; + } + if (prev) { + if (curr->state != nullptr) + delete curr->state; + delete curr; + prev->next = nullptr; + } + } +} + +const char *PdfParser::getPreviousOperator(unsigned int look_back) { + OpHistoryEntry *prev = nullptr; + if (operatorHistory != nullptr && look_back > 0) { + prev = operatorHistory->next; + while (--look_back > 0 && prev != nullptr) { + prev = prev->next; + } + } + if (prev != nullptr) { + return prev->name; + } else { + return ""; + } +} + +void PdfParser::execOp(Object *cmd, Object args[], int numArgs) { + PdfOperator *op; + const char *name; + Object *argPtr; + int i; + + // find operator + name = cmd->getCmd(); + if (!(op = findOp(name))) { + if (ignoreUndef == 0) + error(errSyntaxError, getPos(), "Unknown operator '{0:s}'", name); + return; + } + + // type check args + argPtr = args; + if (op->numArgs >= 0) { + if (numArgs < op->numArgs) { + error(errSyntaxError, getPos(), "Too few ({0:d}) args to '{1:d}' operator", numArgs, name); + return; + } + if (numArgs > op->numArgs) { +#if 0 + error(errSyntaxError, getPos(), "Too many ({0:d}) args to '{1:s}' operator", numArgs, name); +#endif + argPtr += numArgs - op->numArgs; + numArgs = op->numArgs; + } + } else { + if (numArgs > -op->numArgs) { + error(errSyntaxError, getPos(), "Too many ({0:d}) args to '{1:s}' operator", + numArgs, name); + return; + } + } + for (i = 0; i < numArgs; ++i) { + if (!checkArg(&argPtr[i], op->tchk[i])) { + error(errSyntaxError, getPos(), "Arg #{0:d} to '{1:s}' operator is wrong type ({2:s})", + i, name, argPtr[i].getTypeName()); + return; + } + } + + // add to history + pushOperator((char*)&op->name); + + // do it + (this->*op->func)(argPtr, numArgs); +} + +PdfOperator* PdfParser::findOp(const char *name) { + int a = -1; + int b = numOps; + int cmp = -1; + // invariant: opTab[a] < name < opTab[b] + while (b - a > 1) { + const int m = (a + b) / 2; + cmp = strcmp(opTab[m].name, name); + if (cmp < 0) + a = m; + else if (cmp > 0) + b = m; + else + a = b = m; + } + if (cmp != 0) + return nullptr; + return &opTab[a]; +} + +GBool PdfParser::checkArg(Object *arg, TchkType type) { + switch (type) { + case tchkBool: return arg->isBool(); + case tchkInt: return arg->isInt(); + case tchkNum: return arg->isNum(); + case tchkString: return arg->isString(); + case tchkName: return arg->isName(); + case tchkArray: return arg->isArray(); + case tchkProps: return arg->isDict() || arg->isName(); + case tchkSCN: return arg->isNum() || arg->isName(); + case tchkNone: return gFalse; + } + return gFalse; +} + +int PdfParser::getPos() { + return parser ? parser->getPos() : -1; +} + +//------------------------------------------------------------------------ +// graphics state operators +//------------------------------------------------------------------------ + +void PdfParser::opSave(Object /*args*/[], int /*numArgs*/) +{ + saveState(); +} + +void PdfParser::opRestore(Object /*args*/[], int /*numArgs*/) +{ + restoreState(); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opConcat(Object args[], int /*numArgs*/) +{ + state->concatCTM(args[0].getNum(), args[1].getNum(), + args[2].getNum(), args[3].getNum(), + args[4].getNum(), args[5].getNum()); + const char *prevOp = getPreviousOperator(); + double a0 = args[0].getNum(); + double a1 = args[1].getNum(); + double a2 = args[2].getNum(); + double a3 = args[3].getNum(); + double a4 = args[4].getNum(); + double a5 = args[5].getNum(); + if (!strcmp(prevOp, "q")) { + builder->setTransform(a0, a1, a2, a3, a4, a5); + } else if (!strcmp(prevOp, "cm") || !strcmp(prevOp, "startPage")) { + // multiply it with the previous transform + double otherMatrix[6]; + if (!builder->getTransform(otherMatrix)) { // invalid transform + // construct identity matrix + otherMatrix[0] = otherMatrix[3] = 1.0; + otherMatrix[1] = otherMatrix[2] = otherMatrix[4] = otherMatrix[5] = 0.0; + } + double c0 = a0*otherMatrix[0] + a1*otherMatrix[2]; + double c1 = a0*otherMatrix[1] + a1*otherMatrix[3]; + double c2 = a2*otherMatrix[0] + a3*otherMatrix[2]; + double c3 = a2*otherMatrix[1] + a3*otherMatrix[3]; + double c4 = a4*otherMatrix[0] + a5*otherMatrix[2] + otherMatrix[4]; + double c5 = a4*otherMatrix[1] + a5*otherMatrix[3] + otherMatrix[5]; + builder->setTransform(c0, c1, c2, c3, c4, c5); + } else { + builder->pushGroup(); + builder->setTransform(a0, a1, a2, a3, a4, a5); + } + fontChanged = gTrue; +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetDash(Object args[], int /*numArgs*/) +{ + double *dash = nullptr; + + Array *a = args[0].getArray(); + int length = a->getLength(); + if (length != 0) { + dash = (double *)gmallocn(length, sizeof(double)); + for (int i = 0; i < length; ++i) { + Object obj; + dash[i] = _POPPLER_CALL_ARGS_DEREF(obj, a->get, i).getNum(); + _POPPLER_FREE(obj); + } + } +#if POPPLER_CHECK_VERSION(22, 9, 0) + state->setLineDash(std::vector (dash, dash + length), args[1].getNum()); +#else + state->setLineDash(dash, length, args[1].getNum()); +#endif + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetFlat(Object args[], int /*numArgs*/) +{ + state->setFlatness((int)args[0].getNum()); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetLineJoin(Object args[], int /*numArgs*/) +{ + state->setLineJoin(args[0].getInt()); + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetLineCap(Object args[], int /*numArgs*/) +{ + state->setLineCap(args[0].getInt()); + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetMiterLimit(Object args[], int /*numArgs*/) +{ + state->setMiterLimit(args[0].getNum()); + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetLineWidth(Object args[], int /*numArgs*/) +{ + state->setLineWidth(args[0].getNum()); + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetExtGState(Object args[], int /*numArgs*/) +{ + Object obj1, obj2, obj3, obj4, obj5; + Function *funcs[4] = {nullptr, nullptr, nullptr, nullptr}; + GfxColor backdropColor; + GBool haveBackdropColor = gFalse; + GBool alpha = gFalse; + + _POPPLER_CALL_ARGS(obj1, res->lookupGState, args[0].getName()); + if (obj1.isNull()) { + return; + } + if (!obj1.isDict()) { + error(errSyntaxError, getPos(), "ExtGState '{0:s}' is wrong type"), args[0].getName(); + _POPPLER_FREE(obj1); + return; + } + if (printCommands) { + printf(" gfx state dict: "); + obj1.print(); + printf("\n"); + } + + // transparency support: blend mode, fill/stroke opacity + if (!_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "BM").isNull()) { + GfxBlendMode mode = gfxBlendNormal; + if (state->parseBlendMode(&obj2, &mode)) { + state->setBlendMode(mode); + } else { + error(errSyntaxError, getPos(), "Invalid blend mode in ExtGState"); + } + } + _POPPLER_FREE(obj2); + if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "ca").isNum()) { + state->setFillOpacity(obj2.getNum()); + } + _POPPLER_FREE(obj2); + if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "CA").isNum()) { + state->setStrokeOpacity(obj2.getNum()); + } + _POPPLER_FREE(obj2); + + // fill/stroke overprint + GBool haveFillOP = gFalse; + if ((haveFillOP = _POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "op").isBool())) { + state->setFillOverprint(obj2.getBool()); + } + _POPPLER_FREE(obj2); + if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "OP").isBool()) { + state->setStrokeOverprint(obj2.getBool()); + if (!haveFillOP) { + state->setFillOverprint(obj2.getBool()); + } + } + _POPPLER_FREE(obj2); + + // stroke adjust + if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "SA").isBool()) { + state->setStrokeAdjust(obj2.getBool()); + } + _POPPLER_FREE(obj2); + + // transfer function + if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "TR2").isNull()) { + _POPPLER_FREE(obj2); + _POPPLER_CALL_ARGS(obj2, obj1.dictLookup, "TR"); + } + if (obj2.isName(const_cast("Default")) || + obj2.isName(const_cast("Identity"))) { + funcs[0] = funcs[1] = funcs[2] = funcs[3] = nullptr; + state->setTransfer(funcs); + } else if (obj2.isArray() && obj2.arrayGetLength() == 4) { + int pos = 4; + for (int i = 0; i < 4; ++i) { + _POPPLER_CALL_ARGS(obj3, obj2.arrayGet, i); + funcs[i] = Function::parse(&obj3); + _POPPLER_FREE(obj3); + if (!funcs[i]) { + pos = i; + break; + } + } + if (pos == 4) { + state->setTransfer(funcs); + } + } else if (obj2.isName() || obj2.isDict() || obj2.isStream()) { + if ((funcs[0] = Function::parse(&obj2))) { + funcs[1] = funcs[2] = funcs[3] = nullptr; + state->setTransfer(funcs); + } + } else if (!obj2.isNull()) { + error(errSyntaxError, getPos(), "Invalid transfer function in ExtGState"); + } + _POPPLER_FREE(obj2); + + // soft mask + if (!_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "SMask").isNull()) { + if (obj2.isName(const_cast("None"))) { + builder->clearSoftMask(state); + } else if (obj2.isDict()) { + if (_POPPLER_CALL_ARGS_DEREF(obj3, obj2.dictLookup, "S").isName("Alpha")) { + alpha = gTrue; + } else { // "Luminosity" + alpha = gFalse; + } + _POPPLER_FREE(obj3); + funcs[0] = nullptr; + if (!_POPPLER_CALL_ARGS_DEREF(obj3, obj2.dictLookup, "TR").isNull()) { + funcs[0] = Function::parse(&obj3); + if (funcs[0]->getInputSize() != 1 || + funcs[0]->getOutputSize() != 1) { + error(errSyntaxError, getPos(), "Invalid transfer function in soft mask in ExtGState"); + delete funcs[0]; + funcs[0] = nullptr; + } + } + _POPPLER_FREE(obj3); + if ((haveBackdropColor = _POPPLER_CALL_ARGS_DEREF(obj3, obj2.dictLookup, "BC").isArray())) { + for (int & i : backdropColor.c) { + i = 0; + } + for (int i = 0; i < obj3.arrayGetLength() && i < gfxColorMaxComps; ++i) { + _POPPLER_CALL_ARGS(obj4, obj3.arrayGet, i); + if (obj4.isNum()) { + backdropColor.c[i] = dblToCol(obj4.getNum()); + } + _POPPLER_FREE(obj4); + } + } + _POPPLER_FREE(obj3); + if (_POPPLER_CALL_ARGS_DEREF(obj3, obj2.dictLookup, "G").isStream()) { + if (_POPPLER_CALL_ARGS_DEREF(obj4, obj3.streamGetDict()->lookup, "Group").isDict()) { + GfxColorSpace *blendingColorSpace = nullptr; + GBool isolated = gFalse; + GBool knockout = gFalse; + if (!_POPPLER_CALL_ARGS_DEREF(obj5, obj4.dictLookup, "CS").isNull()) { + blendingColorSpace = GfxColorSpace::parse(nullptr, &obj5, nullptr, state); + } + _POPPLER_FREE(obj5); + if (_POPPLER_CALL_ARGS_DEREF(obj5, obj4.dictLookup, "I").isBool()) { + isolated = obj5.getBool(); + } + _POPPLER_FREE(obj5); + if (_POPPLER_CALL_ARGS_DEREF(obj5, obj4.dictLookup, "K").isBool()) { + knockout = obj5.getBool(); + } + _POPPLER_FREE(obj5); + if (!haveBackdropColor) { + if (blendingColorSpace) { + blendingColorSpace->getDefaultColor(&backdropColor); + } else { + //~ need to get the parent or default color space (?) + for (int & i : backdropColor.c) { + i = 0; + } + } + } + doSoftMask(&obj3, alpha, blendingColorSpace, + isolated, knockout, funcs[0], &backdropColor); + if (funcs[0]) { + delete funcs[0]; + } + } else { + error(errSyntaxError, getPos(), "Invalid soft mask in ExtGState - missing group"); + } + _POPPLER_FREE(obj4); + } else { + error(errSyntaxError, getPos(), "Invalid soft mask in ExtGState - missing group"); + } + _POPPLER_FREE(obj3); + } else if (!obj2.isNull()) { + error(errSyntaxError, getPos(), "Invalid soft mask in ExtGState"); + } + } + _POPPLER_FREE(obj2); + + _POPPLER_FREE(obj1); +} + +void PdfParser::doSoftMask(Object *str, GBool alpha, + GfxColorSpace *blendingColorSpace, + GBool isolated, GBool knockout, + Function *transferFunc, GfxColor *backdropColor) { + Dict *dict, *resDict; + double m[6], bbox[4]; + Object obj1, obj2; + int i; + + // check for excessive recursion + if (formDepth > 20) { + return; + } + + // get stream dict + dict = str->streamGetDict(); + + // check form type + _POPPLER_CALL_ARGS(obj1, dict->lookup, "FormType"); + if (!(obj1.isNull() || (obj1.isInt() && obj1.getInt() == 1))) { + error(errSyntaxError, getPos(), "Unknown form type"); + } + _POPPLER_FREE(obj1); + + // get bounding box + _POPPLER_CALL_ARGS(obj1, dict->lookup, "BBox"); + if (!obj1.isArray()) { + _POPPLER_FREE(obj1); + error(errSyntaxError, getPos(), "Bad form bounding box"); + return; + } + for (i = 0; i < 4; ++i) { + _POPPLER_CALL_ARGS(obj2, obj1.arrayGet, i); + bbox[i] = obj2.getNum(); + _POPPLER_FREE(obj2); + } + _POPPLER_FREE(obj1); + + // get matrix + _POPPLER_CALL_ARGS(obj1, dict->lookup, "Matrix"); + if (obj1.isArray()) { + for (i = 0; i < 6; ++i) { + _POPPLER_CALL_ARGS(obj2, obj1.arrayGet, i); + m[i] = obj2.getNum(); + _POPPLER_FREE(obj2); + } + } else { + m[0] = 1; m[1] = 0; + m[2] = 0; m[3] = 1; + m[4] = 0; m[5] = 0; + } + _POPPLER_FREE(obj1); + + // get resources + _POPPLER_CALL_ARGS(obj1, dict->lookup, "Resources"); + resDict = obj1.isDict() ? obj1.getDict() : (Dict *)nullptr; + + // draw it + ++formDepth; + doForm1(str, resDict, m, bbox, gTrue, gTrue, + blendingColorSpace, isolated, knockout, + alpha, transferFunc, backdropColor); + --formDepth; + + if (blendingColorSpace) { + delete blendingColorSpace; + } + _POPPLER_FREE(obj1); +} + +void PdfParser::opSetRenderingIntent(Object /*args*/[], int /*numArgs*/) +{ +} + +//------------------------------------------------------------------------ +// color operators +//------------------------------------------------------------------------ + +/** + * Get a newly allocated color space instance by CS operation argument. + * + * Maintains a cache for named color spaces to avoid expensive re-parsing. + */ +GfxColorSpace *PdfParser::lookupColorSpaceCopy(Object &arg) +{ + assert(!arg.isNull()); + + char const *name = arg.isName() ? arg.getName() : nullptr; + GfxColorSpace *colorSpace = nullptr; + + if (name && (colorSpace = colorSpacesCache[name].get())) { + return colorSpace->copy(); + } + + Object *argPtr = &arg; + Object obj; + + if (name) { + _POPPLER_CALL_ARGS(obj, res->lookupColorSpace, name); + if (!obj.isNull()) { + argPtr = &obj; + } + } + + colorSpace = GfxColorSpace::parse(res, argPtr, nullptr, state); + + _POPPLER_FREE(obj); + + if (name && colorSpace) { + colorSpacesCache[name].reset(colorSpace->copy()); + } + + return colorSpace; +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetFillGray(Object args[], int /*numArgs*/) +{ + GfxColor color; + + state->setFillPattern(nullptr); + state->setFillColorSpace(new GfxDeviceGrayColorSpace()); + color.c[0] = dblToCol(args[0].getNum()); + state->setFillColor(&color); + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetStrokeGray(Object args[], int /*numArgs*/) +{ + GfxColor color; + + state->setStrokePattern(nullptr); + state->setStrokeColorSpace(new GfxDeviceGrayColorSpace()); + color.c[0] = dblToCol(args[0].getNum()); + state->setStrokeColor(&color); + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetFillCMYKColor(Object args[], int /*numArgs*/) +{ + GfxColor color; + int i; + + state->setFillPattern(nullptr); + state->setFillColorSpace(new GfxDeviceCMYKColorSpace()); + for (i = 0; i < 4; ++i) { + color.c[i] = dblToCol(args[i].getNum()); + } + state->setFillColor(&color); + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetStrokeCMYKColor(Object args[], int /*numArgs*/) +{ + GfxColor color; + + state->setStrokePattern(nullptr); + state->setStrokeColorSpace(new GfxDeviceCMYKColorSpace()); + for (int i = 0; i < 4; ++i) { + color.c[i] = dblToCol(args[i].getNum()); + } + state->setStrokeColor(&color); + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetFillRGBColor(Object args[], int /*numArgs*/) +{ + GfxColor color; + + state->setFillPattern(nullptr); + state->setFillColorSpace(new GfxDeviceRGBColorSpace()); + for (int i = 0; i < 3; ++i) { + color.c[i] = dblToCol(args[i].getNum()); + } + state->setFillColor(&color); + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetStrokeRGBColor(Object args[], int /*numArgs*/) { + GfxColor color; + + state->setStrokePattern(nullptr); + state->setStrokeColorSpace(new GfxDeviceRGBColorSpace()); + for (int i = 0; i < 3; ++i) { + color.c[i] = dblToCol(args[i].getNum()); + } + state->setStrokeColor(&color); + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetFillColorSpace(Object args[], int numArgs) +{ + assert(numArgs >= 1); + GfxColorSpace *colorSpace = lookupColorSpaceCopy(args[0]); + + state->setFillPattern(nullptr); + + if (colorSpace) { + GfxColor color; + state->setFillColorSpace(colorSpace); + colorSpace->getDefaultColor(&color); + state->setFillColor(&color); + builder->updateStyle(state); + } else { + error(errSyntaxError, getPos(), "Bad color space (fill)"); + } +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetStrokeColorSpace(Object args[], int numArgs) +{ + assert(numArgs >= 1); + GfxColorSpace *colorSpace = lookupColorSpaceCopy(args[0]); + + state->setStrokePattern(nullptr); + + if (colorSpace) { + GfxColor color; + state->setStrokeColorSpace(colorSpace); + colorSpace->getDefaultColor(&color); + state->setStrokeColor(&color); + builder->updateStyle(state); + } else { + error(errSyntaxError, getPos(), "Bad color space (stroke)"); + } +} + +void PdfParser::opSetFillColor(Object args[], int numArgs) { + GfxColor color; + int i; + + if (numArgs != state->getFillColorSpace()->getNComps()) { + error(errSyntaxError, getPos(), "Incorrect number of arguments in 'sc' command"); + return; + } + state->setFillPattern(nullptr); + for (i = 0; i < numArgs; ++i) { + color.c[i] = dblToCol(args[i].getNum()); + } + state->setFillColor(&color); + builder->updateStyle(state); +} + +void PdfParser::opSetStrokeColor(Object args[], int numArgs) { + GfxColor color; + int i; + + if (numArgs != state->getStrokeColorSpace()->getNComps()) { + error(errSyntaxError, getPos(), "Incorrect number of arguments in 'SC' command"); + return; + } + state->setStrokePattern(nullptr); + for (i = 0; i < numArgs; ++i) { + color.c[i] = dblToCol(args[i].getNum()); + } + state->setStrokeColor(&color); + builder->updateStyle(state); +} + +void PdfParser::opSetFillColorN(Object args[], int numArgs) { + GfxColor color; + int i; + + if (state->getFillColorSpace()->getMode() == csPattern) { + if (numArgs > 1) { + if (!((GfxPatternColorSpace *)state->getFillColorSpace())->getUnder() || + numArgs - 1 != ((GfxPatternColorSpace *)state->getFillColorSpace()) + ->getUnder()->getNComps()) { + error(errSyntaxError, getPos(), "Incorrect number of arguments in 'scn' command"); + return; + } + for (i = 0; i < numArgs - 1 && i < gfxColorMaxComps; ++i) { + if (args[i].isNum()) { + color.c[i] = dblToCol(args[i].getNum()); + } + } + state->setFillColor(&color); + builder->updateStyle(state); + } + GfxPattern *pattern; + if (args[numArgs-1].isName() && + (pattern = res->lookupPattern(args[numArgs-1].getName(), nullptr, state))) { + state->setFillPattern(pattern); + builder->updateStyle(state); + } + + } else { + if (numArgs != state->getFillColorSpace()->getNComps()) { + error(errSyntaxError, getPos(), "Incorrect number of arguments in 'scn' command"); + return; + } + state->setFillPattern(nullptr); + for (i = 0; i < numArgs && i < gfxColorMaxComps; ++i) { + if (args[i].isNum()) { + color.c[i] = dblToCol(args[i].getNum()); + } + } + state->setFillColor(&color); + builder->updateStyle(state); + } +} + +void PdfParser::opSetStrokeColorN(Object args[], int numArgs) { + GfxColor color; + int i; + + if (state->getStrokeColorSpace()->getMode() == csPattern) { + if (numArgs > 1) { + if (!((GfxPatternColorSpace *)state->getStrokeColorSpace()) + ->getUnder() || + numArgs - 1 != ((GfxPatternColorSpace *)state->getStrokeColorSpace()) + ->getUnder()->getNComps()) { + error(errSyntaxError, getPos(), "Incorrect number of arguments in 'SCN' command"); + return; + } + for (i = 0; i < numArgs - 1 && i < gfxColorMaxComps; ++i) { + if (args[i].isNum()) { + color.c[i] = dblToCol(args[i].getNum()); + } + } + state->setStrokeColor(&color); + builder->updateStyle(state); + } + GfxPattern *pattern; + if (args[numArgs-1].isName() && + (pattern = res->lookupPattern(args[numArgs-1].getName(), nullptr, state))) { + state->setStrokePattern(pattern); + builder->updateStyle(state); + } + + } else { + if (numArgs != state->getStrokeColorSpace()->getNComps()) { + error(errSyntaxError, getPos(), "Incorrect number of arguments in 'SCN' command"); + return; + } + state->setStrokePattern(nullptr); + for (i = 0; i < numArgs && i < gfxColorMaxComps; ++i) { + if (args[i].isNum()) { + color.c[i] = dblToCol(args[i].getNum()); + } + } + state->setStrokeColor(&color); + builder->updateStyle(state); + } +} + +//------------------------------------------------------------------------ +// path segment operators +//------------------------------------------------------------------------ + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opMoveTo(Object args[], int /*numArgs*/) +{ + state->moveTo(args[0].getNum(), args[1].getNum()); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opLineTo(Object args[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + error(errSyntaxError, getPos(), "No current point in lineto"); + return; + } + state->lineTo(args[0].getNum(), args[1].getNum()); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opCurveTo(Object args[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + error(errSyntaxError, getPos(), "No current point in curveto"); + return; + } + double x1 = args[0].getNum(); + double y1 = args[1].getNum(); + double x2 = args[2].getNum(); + double y2 = args[3].getNum(); + double x3 = args[4].getNum(); + double y3 = args[5].getNum(); + state->curveTo(x1, y1, x2, y2, x3, y3); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opCurveTo1(Object args[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + error(errSyntaxError, getPos(), "No current point in curveto1"); + return; + } + double x1 = state->getCurX(); + double y1 = state->getCurY(); + double x2 = args[0].getNum(); + double y2 = args[1].getNum(); + double x3 = args[2].getNum(); + double y3 = args[3].getNum(); + state->curveTo(x1, y1, x2, y2, x3, y3); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opCurveTo2(Object args[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + error(errSyntaxError, getPos(), "No current point in curveto2"); + return; + } + double x1 = args[0].getNum(); + double y1 = args[1].getNum(); + double x2 = args[2].getNum(); + double y2 = args[3].getNum(); + double x3 = x2; + double y3 = y2; + state->curveTo(x1, y1, x2, y2, x3, y3); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opRectangle(Object args[], int /*numArgs*/) +{ + double x = args[0].getNum(); + double y = args[1].getNum(); + double w = args[2].getNum(); + double h = args[3].getNum(); + state->moveTo(x, y); + state->lineTo(x + w, y); + state->lineTo(x + w, y + h); + state->lineTo(x, y + h); + state->closePath(); +} + +void PdfParser::opClosePath(Object /*args*/[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + error(errSyntaxError, getPos(), "No current point in closepath"); + return; + } + state->closePath(); +} + +//------------------------------------------------------------------------ +// path painting operators +//------------------------------------------------------------------------ + +void PdfParser::opEndPath(Object /*args*/[], int /*numArgs*/) +{ + doEndPath(); +} + +void PdfParser::opStroke(Object /*args*/[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + //error(getPos(), const_cast("No path in stroke")); + return; + } + if (state->isPath()) { + if (state->getStrokeColorSpace()->getMode() == csPattern && + !builder->isPatternTypeSupported(state->getStrokePattern())) { + doPatternStrokeFallback(); + } else { + builder->addPath(state, false, true); + } + } + doEndPath(); +} + +void PdfParser::opCloseStroke(Object * /*args[]*/, int /*numArgs*/) { + if (!state->isCurPt()) { + //error(getPos(), const_cast("No path in closepath/stroke")); + return; + } + state->closePath(); + if (state->isPath()) { + if (state->getStrokeColorSpace()->getMode() == csPattern && + !builder->isPatternTypeSupported(state->getStrokePattern())) { + doPatternStrokeFallback(); + } else { + builder->addPath(state, false, true); + } + } + doEndPath(); +} + +void PdfParser::opFill(Object /*args*/[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + //error(getPos(), const_cast("No path in fill")); + return; + } + if (state->isPath()) { + if (state->getFillColorSpace()->getMode() == csPattern && + !builder->isPatternTypeSupported(state->getFillPattern())) { + doPatternFillFallback(gFalse); + } else { + builder->addPath(state, true, false); + } + } + doEndPath(); +} + +void PdfParser::opEOFill(Object /*args*/[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + //error(getPos(), const_cast("No path in eofill")); + return; + } + if (state->isPath()) { + if (state->getFillColorSpace()->getMode() == csPattern && + !builder->isPatternTypeSupported(state->getFillPattern())) { + doPatternFillFallback(gTrue); + } else { + builder->addPath(state, true, false, true); + } + } + doEndPath(); +} + +void PdfParser::opFillStroke(Object /*args*/[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + //error(getPos(), const_cast("No path in fill/stroke")); + return; + } + if (state->isPath()) { + doFillAndStroke(gFalse); + } else { + builder->addPath(state, true, true); + } + doEndPath(); +} + +void PdfParser::opCloseFillStroke(Object /*args*/[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + //error(getPos(), const_cast("No path in closepath/fill/stroke")); + return; + } + if (state->isPath()) { + state->closePath(); + doFillAndStroke(gFalse); + } + doEndPath(); +} + +void PdfParser::opEOFillStroke(Object /*args*/[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + //error(getPos(), const_cast("No path in eofill/stroke")); + return; + } + if (state->isPath()) { + doFillAndStroke(gTrue); + } + doEndPath(); +} + +void PdfParser::opCloseEOFillStroke(Object /*args*/[], int /*numArgs*/) +{ + if (!state->isCurPt()) { + //error(getPos(), const_cast("No path in closepath/eofill/stroke")); + return; + } + if (state->isPath()) { + state->closePath(); + doFillAndStroke(gTrue); + } + doEndPath(); +} + +void PdfParser::doFillAndStroke(GBool eoFill) { + GBool fillOk = gTrue, strokeOk = gTrue; + if (state->getFillColorSpace()->getMode() == csPattern && + !builder->isPatternTypeSupported(state->getFillPattern())) { + fillOk = gFalse; + } + if (state->getStrokeColorSpace()->getMode() == csPattern && + !builder->isPatternTypeSupported(state->getStrokePattern())) { + strokeOk = gFalse; + } + if (fillOk && strokeOk) { + builder->addPath(state, true, true, eoFill); + } else { + doPatternFillFallback(eoFill); + doPatternStrokeFallback(); + } +} + +void PdfParser::doPatternFillFallback(GBool eoFill) { + GfxPattern *pattern; + + if (!(pattern = state->getFillPattern())) { + return; + } + switch (pattern->getType()) { + case 1: + break; + case 2: + doShadingPatternFillFallback(static_cast(pattern), gFalse, eoFill); + break; + default: + error(errUnimplemented, getPos(), "Unimplemented pattern type (%d) in fill", + pattern->getType()); + break; + } +} + +void PdfParser::doPatternStrokeFallback() { + GfxPattern *pattern; + + if (!(pattern = state->getStrokePattern())) { + return; + } + switch (pattern->getType()) { + case 1: + break; + case 2: + doShadingPatternFillFallback(static_cast(pattern), gTrue, gFalse); + break; + default: + error(errUnimplemented, getPos(), "Unimplemented pattern type ({0:d}) in stroke", + pattern->getType()); + break; + } +} + +void PdfParser::doShadingPatternFillFallback(GfxShadingPattern *sPat, + GBool stroke, GBool eoFill) { + GfxShading *shading; + GfxPath *savedPath; + const double *ctm, *btm, *ptm; + double m[6], ictm[6], m1[6]; + double xMin, yMin, xMax, yMax; + double det; + + shading = sPat->getShading(); + + // save current graphics state + savedPath = state->getPath()->copy(); + saveState(); + + // clip to bbox + if (false ){//shading->getHasBBox()) { + shading->getBBox(&xMin, &yMin, &xMax, &yMax); + state->moveTo(xMin, yMin); + state->lineTo(xMax, yMin); + state->lineTo(xMax, yMax); + state->lineTo(xMin, yMax); + state->closePath(); + state->clip(); + //builder->clip(state); + state->setPath(savedPath->copy()); + } + + // clip to current path + if (stroke) { + state->clipToStrokePath(); + //out->clipToStrokePath(state); + } else { + state->clip(); + if (eoFill) { + builder->setClipPath(state, true); + } else { + builder->setClipPath(state); + } + } + + // set the color space + state->setFillColorSpace(shading->getColorSpace()->copy()); + + // background color fill + if (shading->getHasBackground()) { + state->setFillColor(shading->getBackground()); + builder->addPath(state, true, false); + } + state->clearPath(); + + // construct a (pattern space) -> (current space) transform matrix + ctm = state->getCTM(); + btm = baseMatrix; + ptm = sPat->getMatrix(); + // iCTM = invert CTM + det = 1 / (ctm[0] * ctm[3] - ctm[1] * ctm[2]); + ictm[0] = ctm[3] * det; + ictm[1] = -ctm[1] * det; + ictm[2] = -ctm[2] * det; + ictm[3] = ctm[0] * det; + ictm[4] = (ctm[2] * ctm[5] - ctm[3] * ctm[4]) * det; + ictm[5] = (ctm[1] * ctm[4] - ctm[0] * ctm[5]) * det; + // m1 = PTM * BTM = PTM * base transform matrix + m1[0] = ptm[0] * btm[0] + ptm[1] * btm[2]; + m1[1] = ptm[0] * btm[1] + ptm[1] * btm[3]; + m1[2] = ptm[2] * btm[0] + ptm[3] * btm[2]; + m1[3] = ptm[2] * btm[1] + ptm[3] * btm[3]; + m1[4] = ptm[4] * btm[0] + ptm[5] * btm[2] + btm[4]; + m1[5] = ptm[4] * btm[1] + ptm[5] * btm[3] + btm[5]; + // m = m1 * iCTM = (PTM * BTM) * (iCTM) + m[0] = m1[0] * ictm[0] + m1[1] * ictm[2]; + m[1] = m1[0] * ictm[1] + m1[1] * ictm[3]; + m[2] = m1[2] * ictm[0] + m1[3] * ictm[2]; + m[3] = m1[2] * ictm[1] + m1[3] * ictm[3]; + m[4] = m1[4] * ictm[0] + m1[5] * ictm[2] + ictm[4]; + m[5] = m1[4] * ictm[1] + m1[5] * ictm[3] + ictm[5]; + + // set the new matrix + state->concatCTM(m[0], m[1], m[2], m[3], m[4], m[5]); + builder->setTransform(m[0], m[1], m[2], m[3], m[4], m[5]); + + // do shading type-specific operations + switch (shading->getType()) { + case 1: + doFunctionShFill(static_cast(shading)); + break; + case 2: + case 3: + // no need to implement these + break; + case 4: + case 5: + doGouraudTriangleShFill(static_cast(shading)); + break; + case 6: + case 7: + doPatchMeshShFill(static_cast(shading)); + break; + } + + // restore graphics state + restoreState(); + state->setPath(savedPath); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opShFill(Object args[], int /*numArgs*/) +{ + GfxShading *shading = nullptr; + GfxPath *savedPath = nullptr; + double xMin, yMin, xMax, yMax; + double xTemp, yTemp; + double gradientTransform[6]; + double *matrix = nullptr; + GBool savedState = gFalse; + + if (!(shading = res->lookupShading(args[0].getName(), nullptr, state))) { + return; + } + + // save current graphics state + if (shading->getType() != 2 && shading->getType() != 3) { + savedPath = state->getPath()->copy(); + saveState(); + savedState = gTrue; + } else { // get gradient transform if possible + // check proper operator sequence + // first there should be one W(*) and then one 'cm' somewhere before 'sh' + GBool seenClip, seenConcat; + seenClip = (clipHistory->getClipPath() != nullptr); + seenConcat = gFalse; + int i = 1; + while (i <= maxOperatorHistoryDepth) { + const char *opName = getPreviousOperator(i); + if (!strcmp(opName, "cm")) { + if (seenConcat) { // more than one 'cm' + break; + } else { + seenConcat = gTrue; + } + } + i++; + } + + if (seenConcat && seenClip) { + if (builder->getTransform(gradientTransform)) { + matrix = (double*)&gradientTransform; + builder->setTransform(1.0, 0.0, 0.0, 1.0, 0.0, 0.0); // remove transform + } + } + } + + // clip to bbox + if (shading->getHasBBox()) { + shading->getBBox(&xMin, &yMin, &xMax, &yMax); + if (matrix != nullptr) { + xTemp = matrix[0]*xMin + matrix[2]*yMin + matrix[4]; + yTemp = matrix[1]*xMin + matrix[3]*yMin + matrix[5]; + state->moveTo(xTemp, yTemp); + xTemp = matrix[0]*xMax + matrix[2]*yMin + matrix[4]; + yTemp = matrix[1]*xMax + matrix[3]*yMin + matrix[5]; + state->lineTo(xTemp, yTemp); + xTemp = matrix[0]*xMax + matrix[2]*yMax + matrix[4]; + yTemp = matrix[1]*xMax + matrix[3]*yMax + matrix[5]; + state->lineTo(xTemp, yTemp); + xTemp = matrix[0]*xMin + matrix[2]*yMax + matrix[4]; + yTemp = matrix[1]*xMin + matrix[3]*yMax + matrix[5]; + state->lineTo(xTemp, yTemp); + } + else { + state->moveTo(xMin, yMin); + state->lineTo(xMax, yMin); + state->lineTo(xMax, yMax); + state->lineTo(xMin, yMax); + } + state->closePath(); + state->clip(); + if (savedState) + builder->setClipPath(state); + else + builder->clip(state); + state->clearPath(); + } + + // set the color space + if (savedState) + state->setFillColorSpace(shading->getColorSpace()->copy()); + + // do shading type-specific operations + switch (shading->getType()) { + case 1: + doFunctionShFill(static_cast(shading)); + break; + case 2: + case 3: + if (clipHistory->getClipPath()) { + builder->addShadedFill(shading, matrix, clipHistory->getClipPath(), + clipHistory->getClipType() == clipEO ? true : false); + } + break; + case 4: + case 5: + doGouraudTriangleShFill(static_cast(shading)); + break; + case 6: + case 7: + doPatchMeshShFill(static_cast(shading)); + break; + } + + // restore graphics state + if (savedState) { + restoreState(); + state->setPath(savedPath); + } + + delete shading; +} + +void PdfParser::doFunctionShFill(GfxFunctionShading *shading) { + double x0, y0, x1, y1; + GfxColor colors[4]; + + shading->getDomain(&x0, &y0, &x1, &y1); + shading->getColor(x0, y0, &colors[0]); + shading->getColor(x0, y1, &colors[1]); + shading->getColor(x1, y0, &colors[2]); + shading->getColor(x1, y1, &colors[3]); + doFunctionShFill1(shading, x0, y0, x1, y1, colors, 0); +} + +void PdfParser::doFunctionShFill1(GfxFunctionShading *shading, + double x0, double y0, + double x1, double y1, + GfxColor *colors, int depth) { + GfxColor fillColor; + GfxColor color0M, color1M, colorM0, colorM1, colorMM; + GfxColor colors2[4]; + double functionColorDelta = colorDeltas[pdfFunctionShading-1]; + const double *matrix; + double xM, yM; + int nComps, i, j; + + nComps = shading->getColorSpace()->getNComps(); + matrix = shading->getMatrix(); + + // compare the four corner colors + for (i = 0; i < 4; ++i) { + for (j = 0; j < nComps; ++j) { + if (abs(colors[i].c[j] - colors[(i+1)&3].c[j]) > functionColorDelta) { + break; + } + } + if (j < nComps) { + break; + } + } + + // center of the rectangle + xM = 0.5 * (x0 + x1); + yM = 0.5 * (y0 + y1); + + // the four corner colors are close (or we hit the recursive limit) + // -- fill the rectangle; but require at least one subdivision + // (depth==0) to avoid problems when the four outer corners of the + // shaded region are the same color + if ((i == 4 && depth > 0) || depth == maxDepths[pdfFunctionShading-1]) { + + // use the center color + shading->getColor(xM, yM, &fillColor); + state->setFillColor(&fillColor); + + // fill the rectangle + state->moveTo(x0 * matrix[0] + y0 * matrix[2] + matrix[4], + x0 * matrix[1] + y0 * matrix[3] + matrix[5]); + state->lineTo(x1 * matrix[0] + y0 * matrix[2] + matrix[4], + x1 * matrix[1] + y0 * matrix[3] + matrix[5]); + state->lineTo(x1 * matrix[0] + y1 * matrix[2] + matrix[4], + x1 * matrix[1] + y1 * matrix[3] + matrix[5]); + state->lineTo(x0 * matrix[0] + y1 * matrix[2] + matrix[4], + x0 * matrix[1] + y1 * matrix[3] + matrix[5]); + state->closePath(); + builder->addPath(state, true, false); + state->clearPath(); + + // the four corner colors are not close enough -- subdivide the + // rectangle + } else { + + // colors[0] colorM0 colors[2] + // (x0,y0) (xM,y0) (x1,y0) + // +----------+----------+ + // | | | + // | UL | UR | + // color0M | colorMM | color1M + // (x0,yM) +----------+----------+ (x1,yM) + // | (xM,yM) | + // | LL | LR | + // | | | + // +----------+----------+ + // colors[1] colorM1 colors[3] + // (x0,y1) (xM,y1) (x1,y1) + + shading->getColor(x0, yM, &color0M); + shading->getColor(x1, yM, &color1M); + shading->getColor(xM, y0, &colorM0); + shading->getColor(xM, y1, &colorM1); + shading->getColor(xM, yM, &colorMM); + + // upper-left sub-rectangle + colors2[0] = colors[0]; + colors2[1] = color0M; + colors2[2] = colorM0; + colors2[3] = colorMM; + doFunctionShFill1(shading, x0, y0, xM, yM, colors2, depth + 1); + + // lower-left sub-rectangle + colors2[0] = color0M; + colors2[1] = colors[1]; + colors2[2] = colorMM; + colors2[3] = colorM1; + doFunctionShFill1(shading, x0, yM, xM, y1, colors2, depth + 1); + + // upper-right sub-rectangle + colors2[0] = colorM0; + colors2[1] = colorMM; + colors2[2] = colors[2]; + colors2[3] = color1M; + doFunctionShFill1(shading, xM, y0, x1, yM, colors2, depth + 1); + + // lower-right sub-rectangle + colors2[0] = colorMM; + colors2[1] = colorM1; + colors2[2] = color1M; + colors2[3] = colors[3]; + doFunctionShFill1(shading, xM, yM, x1, y1, colors2, depth + 1); + } +} + +void PdfParser::doGouraudTriangleShFill(GfxGouraudTriangleShading *shading) { + double x0, y0, x1, y1, x2, y2; + GfxColor color0, color1, color2; + int i; + + for (i = 0; i < shading->getNTriangles(); ++i) { + shading->getTriangle(i, &x0, &y0, &color0, + &x1, &y1, &color1, + &x2, &y2, &color2); + gouraudFillTriangle(x0, y0, &color0, x1, y1, &color1, x2, y2, &color2, + shading->getColorSpace()->getNComps(), 0); + } +} + +void PdfParser::gouraudFillTriangle(double x0, double y0, GfxColor *color0, + double x1, double y1, GfxColor *color1, + double x2, double y2, GfxColor *color2, + int nComps, int depth) { + double x01, y01, x12, y12, x20, y20; + double gouraudColorDelta = colorDeltas[pdfGouraudTriangleShading-1]; + GfxColor color01, color12, color20; + int i; + + for (i = 0; i < nComps; ++i) { + if (abs(color0->c[i] - color1->c[i]) > gouraudColorDelta || + abs(color1->c[i] - color2->c[i]) > gouraudColorDelta) { + break; + } + } + if (i == nComps || depth == maxDepths[pdfGouraudTriangleShading-1]) { + state->setFillColor(color0); + state->moveTo(x0, y0); + state->lineTo(x1, y1); + state->lineTo(x2, y2); + state->closePath(); + builder->addPath(state, true, false); + state->clearPath(); + } else { + x01 = 0.5 * (x0 + x1); + y01 = 0.5 * (y0 + y1); + x12 = 0.5 * (x1 + x2); + y12 = 0.5 * (y1 + y2); + x20 = 0.5 * (x2 + x0); + y20 = 0.5 * (y2 + y0); + //~ if the shading has a Function, this should interpolate on the + //~ function parameter, not on the color components + for (i = 0; i < nComps; ++i) { + color01.c[i] = (color0->c[i] + color1->c[i]) / 2; + color12.c[i] = (color1->c[i] + color2->c[i]) / 2; + color20.c[i] = (color2->c[i] + color0->c[i]) / 2; + } + gouraudFillTriangle(x0, y0, color0, x01, y01, &color01, + x20, y20, &color20, nComps, depth + 1); + gouraudFillTriangle(x01, y01, &color01, x1, y1, color1, + x12, y12, &color12, nComps, depth + 1); + gouraudFillTriangle(x01, y01, &color01, x12, y12, &color12, + x20, y20, &color20, nComps, depth + 1); + gouraudFillTriangle(x20, y20, &color20, x12, y12, &color12, + x2, y2, color2, nComps, depth + 1); + } +} + +void PdfParser::doPatchMeshShFill(GfxPatchMeshShading *shading) { + int start, i; + + if (shading->getNPatches() > 128) { + start = 3; + } else if (shading->getNPatches() > 64) { + start = 2; + } else if (shading->getNPatches() > 16) { + start = 1; + } else { + start = 0; + } + for (i = 0; i < shading->getNPatches(); ++i) { + fillPatch(shading->getPatch(i), shading->getColorSpace()->getNComps(), + start); + } +} + +void PdfParser::fillPatch(_POPPLER_CONST GfxPatch *patch, int nComps, int depth) { + GfxPatch patch00 = blankPatch(); + GfxPatch patch01 = blankPatch(); + GfxPatch patch10 = blankPatch(); + GfxPatch patch11 = blankPatch(); + GfxColor color = {{0}}; + double xx[4][8]; + double yy[4][8]; + double xxm; + double yym; + double patchColorDelta = colorDeltas[pdfPatchMeshShading - 1]; + + int i; + + for (i = 0; i < nComps; ++i) { + if (std::abs(patch->color[0][0].c[i] - patch->color[0][1].c[i]) + > patchColorDelta || + std::abs(patch->color[0][1].c[i] - patch->color[1][1].c[i]) + > patchColorDelta || + std::abs(patch->color[1][1].c[i] - patch->color[1][0].c[i]) + > patchColorDelta || + std::abs(patch->color[1][0].c[i] - patch->color[0][0].c[i]) + > patchColorDelta) { + break; + } + color.c[i] = GfxColorComp(patch->color[0][0].c[i]); + } + if (i == nComps || depth == maxDepths[pdfPatchMeshShading-1]) { + state->setFillColor(&color); + state->moveTo(patch->x[0][0], patch->y[0][0]); + state->curveTo(patch->x[0][1], patch->y[0][1], + patch->x[0][2], patch->y[0][2], + patch->x[0][3], patch->y[0][3]); + state->curveTo(patch->x[1][3], patch->y[1][3], + patch->x[2][3], patch->y[2][3], + patch->x[3][3], patch->y[3][3]); + state->curveTo(patch->x[3][2], patch->y[3][2], + patch->x[3][1], patch->y[3][1], + patch->x[3][0], patch->y[3][0]); + state->curveTo(patch->x[2][0], patch->y[2][0], + patch->x[1][0], patch->y[1][0], + patch->x[0][0], patch->y[0][0]); + state->closePath(); + builder->addPath(state, true, false); + state->clearPath(); + } else { + for (i = 0; i < 4; ++i) { + xx[i][0] = patch->x[i][0]; + yy[i][0] = patch->y[i][0]; + xx[i][1] = 0.5 * (patch->x[i][0] + patch->x[i][1]); + yy[i][1] = 0.5 * (patch->y[i][0] + patch->y[i][1]); + xxm = 0.5 * (patch->x[i][1] + patch->x[i][2]); + yym = 0.5 * (patch->y[i][1] + patch->y[i][2]); + xx[i][6] = 0.5 * (patch->x[i][2] + patch->x[i][3]); + yy[i][6] = 0.5 * (patch->y[i][2] + patch->y[i][3]); + xx[i][2] = 0.5 * (xx[i][1] + xxm); + yy[i][2] = 0.5 * (yy[i][1] + yym); + xx[i][5] = 0.5 * (xxm + xx[i][6]); + yy[i][5] = 0.5 * (yym + yy[i][6]); + xx[i][3] = xx[i][4] = 0.5 * (xx[i][2] + xx[i][5]); + yy[i][3] = yy[i][4] = 0.5 * (yy[i][2] + yy[i][5]); + xx[i][7] = patch->x[i][3]; + yy[i][7] = patch->y[i][3]; + } + for (i = 0; i < 4; ++i) { + patch00.x[0][i] = xx[0][i]; + patch00.y[0][i] = yy[0][i]; + patch00.x[1][i] = 0.5 * (xx[0][i] + xx[1][i]); + patch00.y[1][i] = 0.5 * (yy[0][i] + yy[1][i]); + xxm = 0.5 * (xx[1][i] + xx[2][i]); + yym = 0.5 * (yy[1][i] + yy[2][i]); + patch10.x[2][i] = 0.5 * (xx[2][i] + xx[3][i]); + patch10.y[2][i] = 0.5 * (yy[2][i] + yy[3][i]); + patch00.x[2][i] = 0.5 * (patch00.x[1][i] + xxm); + patch00.y[2][i] = 0.5 * (patch00.y[1][i] + yym); + patch10.x[1][i] = 0.5 * (xxm + patch10.x[2][i]); + patch10.y[1][i] = 0.5 * (yym + patch10.y[2][i]); + patch00.x[3][i] = 0.5 * (patch00.x[2][i] + patch10.x[1][i]); + patch00.y[3][i] = 0.5 * (patch00.y[2][i] + patch10.y[1][i]); + patch10.x[0][i] = patch00.x[3][i]; + patch10.y[0][i] = patch00.y[3][i]; + patch10.x[3][i] = xx[3][i]; + patch10.y[3][i] = yy[3][i]; + } + for (i = 4; i < 8; ++i) { + patch01.x[0][i-4] = xx[0][i]; + patch01.y[0][i-4] = yy[0][i]; + patch01.x[1][i-4] = 0.5 * (xx[0][i] + xx[1][i]); + patch01.y[1][i-4] = 0.5 * (yy[0][i] + yy[1][i]); + xxm = 0.5 * (xx[1][i] + xx[2][i]); + yym = 0.5 * (yy[1][i] + yy[2][i]); + patch11.x[2][i-4] = 0.5 * (xx[2][i] + xx[3][i]); + patch11.y[2][i-4] = 0.5 * (yy[2][i] + yy[3][i]); + patch01.x[2][i-4] = 0.5 * (patch01.x[1][i-4] + xxm); + patch01.y[2][i-4] = 0.5 * (patch01.y[1][i-4] + yym); + patch11.x[1][i-4] = 0.5 * (xxm + patch11.x[2][i-4]); + patch11.y[1][i-4] = 0.5 * (yym + patch11.y[2][i-4]); + patch01.x[3][i-4] = 0.5 * (patch01.x[2][i-4] + patch11.x[1][i-4]); + patch01.y[3][i-4] = 0.5 * (patch01.y[2][i-4] + patch11.y[1][i-4]); + patch11.x[0][i-4] = patch01.x[3][i-4]; + patch11.y[0][i-4] = patch01.y[3][i-4]; + patch11.x[3][i-4] = xx[3][i]; + patch11.y[3][i-4] = yy[3][i]; + } + //~ if the shading has a Function, this should interpolate on the + //~ function parameter, not on the color components + for (i = 0; i < nComps; ++i) { + patch00.color[0][0].c[i] = patch->color[0][0].c[i]; + patch00.color[0][1].c[i] = (patch->color[0][0].c[i] + + patch->color[0][1].c[i]) / 2; + patch01.color[0][0].c[i] = patch00.color[0][1].c[i]; + patch01.color[0][1].c[i] = patch->color[0][1].c[i]; + patch01.color[1][1].c[i] = (patch->color[0][1].c[i] + + patch->color[1][1].c[i]) / 2; + patch11.color[0][1].c[i] = patch01.color[1][1].c[i]; + patch11.color[1][1].c[i] = patch->color[1][1].c[i]; + patch11.color[1][0].c[i] = (patch->color[1][1].c[i] + + patch->color[1][0].c[i]) / 2; + patch10.color[1][1].c[i] = patch11.color[1][0].c[i]; + patch10.color[1][0].c[i] = patch->color[1][0].c[i]; + patch10.color[0][0].c[i] = (patch->color[1][0].c[i] + + patch->color[0][0].c[i]) / 2; + patch00.color[1][0].c[i] = patch10.color[0][0].c[i]; + patch00.color[1][1].c[i] = (patch00.color[1][0].c[i] + + patch01.color[1][1].c[i]) / 2; + patch01.color[1][0].c[i] = patch00.color[1][1].c[i]; + patch11.color[0][0].c[i] = patch00.color[1][1].c[i]; + patch10.color[0][1].c[i] = patch00.color[1][1].c[i]; + } + fillPatch(&patch00, nComps, depth + 1); + fillPatch(&patch10, nComps, depth + 1); + fillPatch(&patch01, nComps, depth + 1); + fillPatch(&patch11, nComps, depth + 1); + } +} + +void PdfParser::doEndPath() { + if (state->isCurPt() && clip != clipNone) { + state->clip(); + if (clip == clipNormal) { + clipHistory->setClip(state->getPath(), clipNormal); + builder->clip(state); + } else { + clipHistory->setClip(state->getPath(), clipEO); + builder->clip(state, true); + } + } + clip = clipNone; + state->clearPath(); +} + +//------------------------------------------------------------------------ +// path clipping operators +//------------------------------------------------------------------------ + +void PdfParser::opClip(Object /*args*/[], int /*numArgs*/) +{ + clip = clipNormal; +} + +void PdfParser::opEOClip(Object /*args*/[], int /*numArgs*/) +{ + clip = clipEO; +} + +//------------------------------------------------------------------------ +// text object operators +//------------------------------------------------------------------------ + +void PdfParser::opBeginText(Object /*args*/[], int /*numArgs*/) +{ + state->setTextMat(1, 0, 0, 1, 0, 0); + state->textMoveTo(0, 0); + builder->updateTextPosition(0.0, 0.0); + fontChanged = gTrue; + builder->beginTextObject(state); +} + +void PdfParser::opEndText(Object /*args*/[], int /*numArgs*/) +{ + builder->endTextObject(state); +} + +//------------------------------------------------------------------------ +// text state operators +//------------------------------------------------------------------------ + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetCharSpacing(Object args[], int /*numArgs*/) +{ + state->setCharSpace(args[0].getNum()); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetFont(Object args[], int /*numArgs*/) +{ + auto font = res->lookupFont(args[0].getName()); + + if (!font) { + // unsetting the font (drawing no text) is better than using the + // previous one and drawing random glyphs from it + state->setFont(nullptr, args[1].getNum()); + fontChanged = gTrue; + return; + } + if (printCommands) { + printf(" font: tag=%s name='%s' %g\n", +#if POPPLER_CHECK_VERSION(21,11,0) + font->getTag().c_str(), +#else + font->getTag()->getCString(), +#endif + font->getName() ? font->getName()->getCString() : "???", + args[1].getNum()); + fflush(stdout); + } + +#if !POPPLER_CHECK_VERSION(22, 4, 0) + font->incRefCnt(); +#endif + state->setFont(font, args[1].getNum()); + fontChanged = gTrue; +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetTextLeading(Object args[], int /*numArgs*/) +{ + state->setLeading(args[0].getNum()); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetTextRender(Object args[], int /*numArgs*/) +{ + state->setRender(args[0].getInt()); + builder->updateStyle(state); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetTextRise(Object args[], int /*numArgs*/) +{ + state->setRise(args[0].getNum()); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetWordSpacing(Object args[], int /*numArgs*/) +{ + state->setWordSpace(args[0].getNum()); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetHorizScaling(Object args[], int /*numArgs*/) +{ + state->setHorizScaling(args[0].getNum()); + builder->updateTextMatrix(state); + fontChanged = gTrue; +} + +//------------------------------------------------------------------------ +// text positioning operators +//------------------------------------------------------------------------ + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opTextMove(Object args[], int /*numArgs*/) +{ + double tx, ty; + + tx = state->getLineX() + args[0].getNum(); + ty = state->getLineY() + args[1].getNum(); + state->textMoveTo(tx, ty); + builder->updateTextPosition(tx, ty); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opTextMoveSet(Object args[], int /*numArgs*/) +{ + double tx, ty; + + tx = state->getLineX() + args[0].getNum(); + ty = args[1].getNum(); + state->setLeading(-ty); + ty += state->getLineY(); + state->textMoveTo(tx, ty); + builder->updateTextPosition(tx, ty); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opSetTextMatrix(Object args[], int /*numArgs*/) +{ + state->setTextMat(args[0].getNum(), args[1].getNum(), + args[2].getNum(), args[3].getNum(), + args[4].getNum(), args[5].getNum()); + state->textMoveTo(0, 0); + builder->updateTextMatrix(state); + builder->updateTextPosition(0.0, 0.0); + fontChanged = gTrue; +} + +void PdfParser::opTextNextLine(Object /*args*/[], int /*numArgs*/) +{ + double tx, ty; + + tx = state->getLineX(); + ty = state->getLineY() - state->getLeading(); + state->textMoveTo(tx, ty); + builder->updateTextPosition(tx, ty); +} + +//------------------------------------------------------------------------ +// text string operators +//------------------------------------------------------------------------ + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opShowText(Object args[], int /*numArgs*/) +{ + if (!state->getFont()) { + error(errSyntaxError, getPos(), "No font in show"); + return; + } + if (fontChanged) { + builder->updateFont(state); + fontChanged = gFalse; + } + doShowText(args[0].getString()); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opMoveShowText(Object args[], int /*numArgs*/) +{ + double tx = 0; + double ty = 0; + + if (!state->getFont()) { + error(errSyntaxError, getPos(), "No font in move/show"); + return; + } + if (fontChanged) { + builder->updateFont(state); + fontChanged = gFalse; + } + tx = state->getLineX(); + ty = state->getLineY() - state->getLeading(); + state->textMoveTo(tx, ty); + builder->updateTextPosition(tx, ty); + doShowText(args[0].getString()); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opMoveSetShowText(Object args[], int /*numArgs*/) +{ + double tx = 0; + double ty = 0; + + if (!state->getFont()) { + error(errSyntaxError, getPos(), "No font in move/set/show"); + return; + } + if (fontChanged) { + builder->updateFont(state); + fontChanged = gFalse; + } + state->setWordSpace(args[0].getNum()); + state->setCharSpace(args[1].getNum()); + tx = state->getLineX(); + ty = state->getLineY() - state->getLeading(); + state->textMoveTo(tx, ty); + builder->updateTextPosition(tx, ty); + doShowText(args[2].getString()); +} + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opShowSpaceText(Object args[], int /*numArgs*/) +{ + Array *a = nullptr; + Object obj; + int wMode = 0; + + if (!state->getFont()) { + error(errSyntaxError, getPos(), "No font in show/space"); + return; + } + if (fontChanged) { + builder->updateFont(state); + fontChanged = gFalse; + } + wMode = state->getFont()->getWMode(); + a = args[0].getArray(); + for (int i = 0; i < a->getLength(); ++i) { + _POPPLER_CALL_ARGS(obj, a->get, i); + if (obj.isNum()) { + // this uses the absolute value of the font size to match + // Acrobat's behavior + if (wMode) { + state->textShift(0, -obj.getNum() * 0.001 * + fabs(state->getFontSize())); + } else { + state->textShift(-obj.getNum() * 0.001 * + fabs(state->getFontSize()), 0); + } + builder->updateTextShift(state, obj.getNum()); + } else if (obj.isString()) { + doShowText(obj.getString()); + } else { + error(errSyntaxError, getPos(), "Element of show/space array must be number or string"); + } + _POPPLER_FREE(obj); + } +} + +#if POPPLER_CHECK_VERSION(0,64,0) +void PdfParser::doShowText(const GooString *s) { +#else +void PdfParser::doShowText(GooString *s) { +#endif + int wMode; + double riseX, riseY; + CharCode code; + Unicode _POPPLER_CONST_82 *u = nullptr; + double x, y, dx, dy, tdx, tdy; + double originX, originY, tOriginX, tOriginY; + double oldCTM[6], newCTM[6]; + const double *mat; + Object charProc; + Dict *resDict; + Parser *oldParser; +#if POPPLER_CHECK_VERSION(0,64,0) + const char *p; +#else + char *p; +#endif + int len, n, uLen; + + auto font = state->getFont(); + wMode = font->getWMode(); + + builder->beginString(state); + + // handle a Type 3 char + if (font->getType() == fontType3 && false) {//out->interpretType3Chars()) { + mat = state->getCTM(); + for (int i = 0; i < 6; ++i) { + oldCTM[i] = mat[i]; + } + mat = state->getTextMat(); + newCTM[0] = mat[0] * oldCTM[0] + mat[1] * oldCTM[2]; + newCTM[1] = mat[0] * oldCTM[1] + mat[1] * oldCTM[3]; + newCTM[2] = mat[2] * oldCTM[0] + mat[3] * oldCTM[2]; + newCTM[3] = mat[2] * oldCTM[1] + mat[3] * oldCTM[3]; + mat = font->getFontMatrix(); + newCTM[0] = mat[0] * newCTM[0] + mat[1] * newCTM[2]; + newCTM[1] = mat[0] * newCTM[1] + mat[1] * newCTM[3]; + newCTM[2] = mat[2] * newCTM[0] + mat[3] * newCTM[2]; + newCTM[3] = mat[2] * newCTM[1] + mat[3] * newCTM[3]; + newCTM[0] *= state->getFontSize(); + newCTM[1] *= state->getFontSize(); + newCTM[2] *= state->getFontSize(); + newCTM[3] *= state->getFontSize(); + newCTM[0] *= state->getHorizScaling(); + newCTM[2] *= state->getHorizScaling(); + state->textTransformDelta(0, state->getRise(), &riseX, &riseY); + double curX = state->getCurX(); + double curY = state->getCurY(); + double lineX = state->getLineX(); + double lineY = state->getLineY(); + oldParser = parser; + p = s->getCString(); + len = s->getLength(); + while (len > 0) { + n = font->getNextChar(p, len, &code, + &u, &uLen, /* TODO: This looks like a memory leak for u. */ + &dx, &dy, &originX, &originY); + dx = dx * state->getFontSize() + state->getCharSpace(); + if (n == 1 && *p == ' ') { + dx += state->getWordSpace(); + } + dx *= state->getHorizScaling(); + dy *= state->getFontSize(); + state->textTransformDelta(dx, dy, &tdx, &tdy); + state->transform(curX + riseX, curY + riseY, &x, &y); + saveState(); + state->setCTM(newCTM[0], newCTM[1], newCTM[2], newCTM[3], x, y); + //~ the CTM concat values here are wrong (but never used) + //out->updateCTM(state, 1, 0, 0, 1, 0, 0); + if (false){ /*!out->beginType3Char(state, curX + riseX, curY + riseY, tdx, tdy, + code, u, uLen)) {*/ + _POPPLER_CALL_ARGS(charProc, _POPPLER_FONTPTR_TO_GFX8(font)->getCharProc, code); + if (resDict = _POPPLER_FONTPTR_TO_GFX8(font)->getResources()) { + pushResources(resDict); + } + if (charProc.isStream()) { + //parse(&charProc, gFalse); // TODO: parse into SVG font + } else { + error(errSyntaxError, getPos(), "Missing or bad Type3 CharProc entry"); + } + //out->endType3Char(state); + if (resDict) { + popResources(); + } + _POPPLER_FREE(charProc); + } + restoreState(); + // GfxState::restore() does *not* restore the current position, + // so we deal with it here using (curX, curY) and (lineX, lineY) + curX += tdx; + curY += tdy; + state->moveTo(curX, curY); + state->textSetPos(lineX, lineY); + p += n; + len -= n; + } + parser = oldParser; + + } else { + state->textTransformDelta(0, state->getRise(), &riseX, &riseY); + p = s->getCString(); + len = s->getLength(); + while (len > 0) { + n = font->getNextChar(p, len, &code, + &u, &uLen, /* TODO: This looks like a memory leak for u. */ + &dx, &dy, &originX, &originY); + + if (wMode) { + dx *= state->getFontSize(); + dy = dy * state->getFontSize() + state->getCharSpace(); + if (n == 1 && *p == ' ') { + dy += state->getWordSpace(); + } + } else { + dx = dx * state->getFontSize() + state->getCharSpace(); + if (n == 1 && *p == ' ') { + dx += state->getWordSpace(); + } + dx *= state->getHorizScaling(); + dy *= state->getFontSize(); + } + state->textTransformDelta(dx, dy, &tdx, &tdy); + originX *= state->getFontSize(); + originY *= state->getFontSize(); + state->textTransformDelta(originX, originY, &tOriginX, &tOriginY); + builder->addChar(state, state->getCurX() + riseX, state->getCurY() + riseY, + dx, dy, tOriginX, tOriginY, code, n, u, uLen); + state->shift(tdx, tdy); + p += n; + len -= n; + } + } + + builder->endString(state); +} + + +//------------------------------------------------------------------------ +// XObject operators +//------------------------------------------------------------------------ + +// TODO not good that numArgs is ignored but args[] is used: +void PdfParser::opXObject(Object args[], int /*numArgs*/) +{ + Object obj1, obj2, obj3, refObj; + +#if POPPLER_CHECK_VERSION(0,64,0) + const char *name = args[0].getName(); +#else + char *name = args[0].getName(); +#endif + _POPPLER_CALL_ARGS(obj1, res->lookupXObject, name); + if (obj1.isNull()) { + return; + } + if (!obj1.isStream()) { + error(errSyntaxError, getPos(), "XObject '{0:s}' is wrong type", name); + _POPPLER_FREE(obj1); + return; + } + _POPPLER_CALL_ARGS(obj2, obj1.streamGetDict()->lookup, "Subtype"); + if (obj2.isName(const_cast("Image"))) { + _POPPLER_CALL_ARGS(refObj, res->lookupXObjectNF, name); + doImage(&refObj, obj1.getStream(), gFalse); + _POPPLER_FREE(refObj); + } else if (obj2.isName(const_cast("Form"))) { + doForm(&obj1); + } else if (obj2.isName(const_cast("PS"))) { + _POPPLER_CALL_ARGS(obj3, obj1.streamGetDict()->lookup, "Level1"); +/* out->psXObject(obj1.getStream(), + obj3.isStream() ? obj3.getStream() : (Stream *)NULL);*/ + } else if (obj2.isName()) { + error(errSyntaxError, getPos(), "Unknown XObject subtype '{0:s}'", obj2.getName()); + } else { + error(errSyntaxError, getPos(), "XObject subtype is missing or wrong type"); + } + _POPPLER_FREE(obj2); + _POPPLER_FREE(obj1); +} + +void PdfParser::doImage(Object * /*ref*/, Stream *str, GBool inlineImg) +{ + Dict *dict; + int width, height; + int bits; + GBool interpolate; + StreamColorSpaceMode csMode; + GBool mask; + GBool invert; + Object maskObj, smaskObj; + GBool haveColorKeyMask, haveExplicitMask, haveSoftMask; + GBool maskInvert; + GBool maskInterpolate; + Object obj1, obj2; + + // get info from the stream + bits = 0; + csMode = streamCSNone; + str->getImageParams(&bits, &csMode); + + // get stream dict + dict = str->getDict(); + + // get size + _POPPLER_CALL_ARGS(obj1, dict->lookup, "Width"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, dict->lookup, "W"); + } + if (obj1.isInt()){ + width = obj1.getInt(); + } + else if (obj1.isReal()) { + width = (int)obj1.getReal(); + } + else { + goto err2; + } + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, dict->lookup, "Height"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, dict->lookup, "H"); + } + if (obj1.isInt()) { + height = obj1.getInt(); + } + else if (obj1.isReal()){ + height = static_cast(obj1.getReal()); + } + else { + goto err2; + } + _POPPLER_FREE(obj1); + + // image interpolation + _POPPLER_CALL_ARGS(obj1, dict->lookup, "Interpolate"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, dict->lookup, "I"); + } + if (obj1.isBool()) + interpolate = obj1.getBool(); + else + interpolate = gFalse; + _POPPLER_FREE(obj1); + maskInterpolate = gFalse; + + // image or mask? + _POPPLER_CALL_ARGS(obj1, dict->lookup, "ImageMask"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, dict->lookup, "IM"); + } + mask = gFalse; + if (obj1.isBool()) { + mask = obj1.getBool(); + } + else if (!obj1.isNull()) { + goto err2; + } + _POPPLER_FREE(obj1); + + // bit depth + if (bits == 0) { + _POPPLER_CALL_ARGS(obj1, dict->lookup, "BitsPerComponent"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, dict->lookup, "BPC"); + } + if (obj1.isInt()) { + bits = obj1.getInt(); + } else if (mask) { + bits = 1; + } else { + goto err2; + } + _POPPLER_FREE(obj1); + } + + // display a mask + if (mask) { + // check for inverted mask + if (bits != 1) { + goto err1; + } + invert = gFalse; + _POPPLER_CALL_ARGS(obj1, dict->lookup, "Decode"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, dict->lookup, "D"); + } + if (obj1.isArray()) { + _POPPLER_CALL_ARGS(obj2, obj1.arrayGet, 0); + if (obj2.isInt() && obj2.getInt() == 1) { + invert = gTrue; + } + _POPPLER_FREE(obj2); + } else if (!obj1.isNull()) { + goto err2; + } + _POPPLER_FREE(obj1); + + // draw it + builder->addImageMask(state, str, width, height, invert, interpolate); + + } else { + // get color space and color map + GfxColorSpace *colorSpace; + _POPPLER_CALL_ARGS(obj1, dict->lookup, "ColorSpace"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, dict->lookup, "CS"); + } + if (!obj1.isNull()) { + colorSpace = lookupColorSpaceCopy(obj1); + } else if (csMode == streamCSDeviceGray) { + colorSpace = new GfxDeviceGrayColorSpace(); + } else if (csMode == streamCSDeviceRGB) { + colorSpace = new GfxDeviceRGBColorSpace(); + } else if (csMode == streamCSDeviceCMYK) { + colorSpace = new GfxDeviceCMYKColorSpace(); + } else { + colorSpace = nullptr; + } + _POPPLER_FREE(obj1); + if (!colorSpace) { + goto err1; + } + _POPPLER_CALL_ARGS(obj1, dict->lookup, "Decode"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, dict->lookup, "D"); + } + GfxImageColorMap *colorMap = new GfxImageColorMap(bits, &obj1, colorSpace); + _POPPLER_FREE(obj1); + if (!colorMap->isOk()) { + delete colorMap; + goto err1; + } + + // get the mask + int maskColors[2*gfxColorMaxComps]; + haveColorKeyMask = haveExplicitMask = haveSoftMask = gFalse; + Stream *maskStr = nullptr; + int maskWidth = 0; + int maskHeight = 0; + maskInvert = gFalse; + GfxImageColorMap *maskColorMap = nullptr; + _POPPLER_CALL_ARGS(maskObj, dict->lookup, "Mask"); + _POPPLER_CALL_ARGS(smaskObj, dict->lookup, "SMask"); + Dict* maskDict; + if (smaskObj.isStream()) { + // soft mask + if (inlineImg) { + goto err1; + } + maskStr = smaskObj.getStream(); + maskDict = smaskObj.streamGetDict(); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Width"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "W"); + } + if (!obj1.isInt()) { + goto err2; + } + maskWidth = obj1.getInt(); + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Height"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "H"); + } + if (!obj1.isInt()) { + goto err2; + } + maskHeight = obj1.getInt(); + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "BitsPerComponent"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "BPC"); + } + if (!obj1.isInt()) { + goto err2; + } + int maskBits = obj1.getInt(); + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Interpolate"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "I"); + } + if (obj1.isBool()) + maskInterpolate = obj1.getBool(); + else + maskInterpolate = gFalse; + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "ColorSpace"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "CS"); + } + GfxColorSpace *maskColorSpace = lookupColorSpaceCopy(obj1); + _POPPLER_FREE(obj1); + if (!maskColorSpace || maskColorSpace->getMode() != csDeviceGray) { + goto err1; + } + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Decode"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "D"); + } + maskColorMap = new GfxImageColorMap(maskBits, &obj1, maskColorSpace); + _POPPLER_FREE(obj1); + if (!maskColorMap->isOk()) { + delete maskColorMap; + goto err1; + } + //~ handle the Matte entry + haveSoftMask = gTrue; + } else if (maskObj.isArray()) { + // color key mask + int i; + for (i = 0; i < maskObj.arrayGetLength() && i < 2*gfxColorMaxComps; ++i) { + _POPPLER_CALL_ARGS(obj1, maskObj.arrayGet, i); + maskColors[i] = obj1.getInt(); + _POPPLER_FREE(obj1); + } + haveColorKeyMask = gTrue; + } else if (maskObj.isStream()) { + // explicit mask + if (inlineImg) { + goto err1; + } + maskStr = maskObj.getStream(); + maskDict = maskObj.streamGetDict(); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Width"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "W"); + } + if (!obj1.isInt()) { + goto err2; + } + maskWidth = obj1.getInt(); + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Height"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "H"); + } + if (!obj1.isInt()) { + goto err2; + } + maskHeight = obj1.getInt(); + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "ImageMask"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "IM"); + } + if (!obj1.isBool() || !obj1.getBool()) { + goto err2; + } + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Interpolate"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "I"); + } + if (obj1.isBool()) + maskInterpolate = obj1.getBool(); + else + maskInterpolate = gFalse; + _POPPLER_FREE(obj1); + maskInvert = gFalse; + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "Decode"); + if (obj1.isNull()) { + _POPPLER_FREE(obj1); + _POPPLER_CALL_ARGS(obj1, maskDict->lookup, "D"); + } + if (obj1.isArray()) { + _POPPLER_CALL_ARGS(obj2, obj1.arrayGet, 0); + if (obj2.isInt() && obj2.getInt() == 1) { + maskInvert = gTrue; + } + _POPPLER_FREE(obj2); + } else if (!obj1.isNull()) { + goto err2; + } + _POPPLER_FREE(obj1); + haveExplicitMask = gTrue; + } + + // draw it + if (haveSoftMask) { + builder->addSoftMaskedImage(state, str, width, height, colorMap, interpolate, + maskStr, maskWidth, maskHeight, maskColorMap, maskInterpolate); + delete maskColorMap; + } else if (haveExplicitMask) { + builder->addMaskedImage(state, str, width, height, colorMap, interpolate, + maskStr, maskWidth, maskHeight, maskInvert, maskInterpolate); + } else { + builder->addImage(state, str, width, height, colorMap, interpolate, + haveColorKeyMask ? maskColors : static_cast(nullptr)); + } + delete colorMap; + + _POPPLER_FREE(maskObj); + _POPPLER_FREE(smaskObj); + } + + return; + + err2: + _POPPLER_FREE(obj1); + err1: + error(errSyntaxError, getPos(), "Bad image parameters"); +} + +void PdfParser::doForm(Object *str) { + Dict *dict; + GBool transpGroup, isolated, knockout; + GfxColorSpace *blendingColorSpace; + Object matrixObj, bboxObj; + double m[6], bbox[4]; + Object resObj; + Dict *resDict; + Object obj1, obj2, obj3; + int i; + + // check for excessive recursion + if (formDepth > 20) { + return; + } + + // get stream dict + dict = str->streamGetDict(); + + // check form type + _POPPLER_CALL_ARGS(obj1, dict->lookup, "FormType"); + if (!(obj1.isNull() || (obj1.isInt() && obj1.getInt() == 1))) { + error(errSyntaxError, getPos(), "Unknown form type"); + } + _POPPLER_FREE(obj1); + + // get bounding box + _POPPLER_CALL_ARGS(bboxObj, dict->lookup, "BBox"); + if (!bboxObj.isArray()) { + _POPPLER_FREE(bboxObj); + error(errSyntaxError, getPos(), "Bad form bounding box"); + return; + } + for (i = 0; i < 4; ++i) { + _POPPLER_CALL_ARGS(obj1, bboxObj.arrayGet, i); + bbox[i] = obj1.getNum(); + _POPPLER_FREE(obj1); + } + _POPPLER_FREE(bboxObj); + + // get matrix + _POPPLER_CALL_ARGS(matrixObj, dict->lookup, "Matrix"); + if (matrixObj.isArray()) { + for (i = 0; i < 6; ++i) { + _POPPLER_CALL_ARGS(obj1, matrixObj.arrayGet, i); + m[i] = obj1.getNum(); + _POPPLER_FREE(obj1); + } + } else { + m[0] = 1; m[1] = 0; + m[2] = 0; m[3] = 1; + m[4] = 0; m[5] = 0; + } + _POPPLER_FREE(matrixObj); + + // get resources + _POPPLER_CALL_ARGS(resObj, dict->lookup, "Resources"); + resDict = resObj.isDict() ? resObj.getDict() : (Dict *)nullptr; + + // check for a transparency group + transpGroup = isolated = knockout = gFalse; + blendingColorSpace = nullptr; + if (_POPPLER_CALL_ARGS_DEREF(obj1, dict->lookup, "Group").isDict()) { + if (_POPPLER_CALL_ARGS_DEREF(obj2, obj1.dictLookup, "S").isName("Transparency")) { + transpGroup = gTrue; + if (!_POPPLER_CALL_ARGS_DEREF(obj3, obj1.dictLookup, "CS").isNull()) { + blendingColorSpace = GfxColorSpace::parse(nullptr, &obj3, nullptr, state); + } + _POPPLER_FREE(obj3); + if (_POPPLER_CALL_ARGS_DEREF(obj3, obj1.dictLookup, "I").isBool()) { + isolated = obj3.getBool(); + } + _POPPLER_FREE(obj3); + if (_POPPLER_CALL_ARGS_DEREF(obj3, obj1.dictLookup, "K").isBool()) { + knockout = obj3.getBool(); + } + _POPPLER_FREE(obj3); + } + _POPPLER_FREE(obj2); + } + _POPPLER_FREE(obj1); + + // draw it + ++formDepth; + doForm1(str, resDict, m, bbox, + transpGroup, gFalse, blendingColorSpace, isolated, knockout); + --formDepth; + + if (blendingColorSpace) { + delete blendingColorSpace; + } + _POPPLER_FREE(resObj); +} + +void PdfParser::doForm1(Object *str, Dict *resDict, double *matrix, double *bbox, + GBool transpGroup, GBool softMask, + GfxColorSpace *blendingColorSpace, + GBool isolated, GBool knockout, + GBool alpha, Function *transferFunc, + GfxColor *backdropColor) { + Parser *oldParser; + double oldBaseMatrix[6]; + int i; + + // push new resources on stack + pushResources(resDict); + + // save current graphics state + saveState(); + + // kill any pre-existing path + state->clearPath(); + + if (softMask || transpGroup) { + builder->clearSoftMask(state); + builder->pushTransparencyGroup(state, bbox, blendingColorSpace, + isolated, knockout, softMask); + } + + // save current parser + oldParser = parser; + + // set form transformation matrix + state->concatCTM(matrix[0], matrix[1], matrix[2], + matrix[3], matrix[4], matrix[5]); + builder->setTransform(matrix[0], matrix[1], matrix[2], + matrix[3], matrix[4], matrix[5]); + + // set form bounding box + state->moveTo(bbox[0], bbox[1]); + state->lineTo(bbox[2], bbox[1]); + state->lineTo(bbox[2], bbox[3]); + state->lineTo(bbox[0], bbox[3]); + state->closePath(); + state->clip(); + clipHistory->setClip(state->getPath()); + builder->clip(state); + state->clearPath(); + + if (softMask || transpGroup) { + if (state->getBlendMode() != gfxBlendNormal) { + state->setBlendMode(gfxBlendNormal); + } + if (state->getFillOpacity() != 1) { + builder->setGroupOpacity(state->getFillOpacity()); + state->setFillOpacity(1); + } + if (state->getStrokeOpacity() != 1) { + state->setStrokeOpacity(1); + } + } + + // set new base matrix + for (i = 0; i < 6; ++i) { + oldBaseMatrix[i] = baseMatrix[i]; + baseMatrix[i] = state->getCTM()[i]; + } + + // draw the form + parse(str, gFalse); + + // restore base matrix + for (i = 0; i < 6; ++i) { + baseMatrix[i] = oldBaseMatrix[i]; + } + + // restore parser + parser = oldParser; + + if (softMask || transpGroup) { + builder->popTransparencyGroup(state); + } + + // restore graphics state + restoreState(); + + // pop resource stack + popResources(); + + if (softMask) { + builder->setSoftMask(state, bbox, alpha, transferFunc, backdropColor); + } else if (transpGroup) { + builder->paintTransparencyGroup(state, bbox); + } + + return; +} + +//------------------------------------------------------------------------ +// in-line image operators +//------------------------------------------------------------------------ + +void PdfParser::opBeginImage(Object /*args*/[], int /*numArgs*/) +{ + // build dict/stream + Stream *str = buildImageStream(); + + // display the image + if (str) { + doImage(nullptr, str, gTrue); + + // skip 'EI' tag + int c1 = str->getUndecodedStream()->getChar(); + int c2 = str->getUndecodedStream()->getChar(); + while (!(c1 == 'E' && c2 == 'I') && c2 != EOF) { + c1 = c2; + c2 = str->getUndecodedStream()->getChar(); + } + delete str; + } +} + +Stream *PdfParser::buildImageStream() { + Object dict; + Object obj; + Stream *str; + + // build dictionary +#if defined(POPPLER_NEW_OBJECT_API) + dict = Object(new Dict(xref)); +#else + dict.initDict(xref); +#endif + _POPPLER_CALL(obj, parser->getObj); + while (!obj.isCmd(const_cast("ID")) && !obj.isEOF()) { + if (!obj.isName()) { + error(errSyntaxError, getPos(), "Inline image dictionary key must be a name object"); + _POPPLER_FREE(obj); + } else { + Object obj2; + _POPPLER_CALL(obj2, parser->getObj); + if (obj2.isEOF() || obj2.isError()) { + _POPPLER_FREE(obj); + break; + } + _POPPLER_DICTADD(dict, obj.getName(), obj2); + _POPPLER_FREE(obj); + _POPPLER_FREE(obj2); + } + _POPPLER_CALL(obj, parser->getObj); + } + if (obj.isEOF()) { + error(errSyntaxError, getPos(), "End of file in inline image"); + _POPPLER_FREE(obj); + _POPPLER_FREE(dict); + return nullptr; + } + _POPPLER_FREE(obj); + + // make stream +#if defined(POPPLER_NEW_OBJECT_API) + str = new EmbedStream(parser->getStream(), dict.copy(), gFalse, 0); + str = str->addFilters(dict.getDict()); +#else + str = new EmbedStream(parser->getStream(), &dict, gFalse, 0); + str = str->addFilters(&dict); +#endif + + return str; +} + +void PdfParser::opImageData(Object /*args*/[], int /*numArgs*/) +{ + error(errInternal, getPos(), "Internal: got 'ID' operator"); +} + +void PdfParser::opEndImage(Object /*args*/[], int /*numArgs*/) +{ + error(errInternal, getPos(), "Internal: got 'EI' operator"); +} + +//------------------------------------------------------------------------ +// type 3 font operators +//------------------------------------------------------------------------ + +void PdfParser::opSetCharWidth(Object /*args*/[], int /*numArgs*/) +{ +} + +void PdfParser::opSetCacheDevice(Object /*args*/[], int /*numArgs*/) +{ +} + +//------------------------------------------------------------------------ +// compatibility operators +//------------------------------------------------------------------------ + +void PdfParser::opBeginIgnoreUndef(Object /*args*/[], int /*numArgs*/) +{ + ++ignoreUndef; +} + +void PdfParser::opEndIgnoreUndef(Object /*args*/[], int /*numArgs*/) +{ + if (ignoreUndef > 0) + --ignoreUndef; +} + +//------------------------------------------------------------------------ +// marked content operators +//------------------------------------------------------------------------ + +void PdfParser::opBeginMarkedContent(Object args[], int numArgs) { + if (printCommands) { + printf(" marked content: %s ", args[0].getName()); + if (numArgs == 2) + args[2].print(stdout); + printf("\n"); + fflush(stdout); + } + + if(numArgs == 2) { + //out->beginMarkedContent(args[0].getName(),args[1].getDict()); + } else { + //out->beginMarkedContent(args[0].getName()); + } +} + +void PdfParser::opEndMarkedContent(Object /*args*/[], int /*numArgs*/) +{ + //out->endMarkedContent(); +} + +void PdfParser::opMarkPoint(Object args[], int numArgs) { + if (printCommands) { + printf(" mark point: %s ", args[0].getName()); + if (numArgs == 2) + args[2].print(stdout); + printf("\n"); + fflush(stdout); + } + + if(numArgs == 2) { + //out->markPoint(args[0].getName(),args[1].getDict()); + } else { + //out->markPoint(args[0].getName()); + } + +} + +//------------------------------------------------------------------------ +// misc +//------------------------------------------------------------------------ + +void PdfParser::saveState() { + bool is_radial = false; + + GfxPattern *pattern = state->getFillPattern(); + if (pattern != nullptr) + if (pattern->getType() == 2 ) { + GfxShadingPattern *shading_pattern = static_cast(pattern); + GfxShading *shading = shading_pattern->getShading(); + if (shading->getType() == 3) + is_radial = true; + } + + builder->saveState(); + if (is_radial) + state->save(); // nasty hack to prevent GfxRadialShading from getting corrupted during copy operation + else + state = state->save(); // see LP Bug 919176 comment 8 + clipHistory = clipHistory->save(); +} + +void PdfParser::restoreState() { + clipHistory = clipHistory->restore(); + state = state->restore(); + builder->restoreState(); +} + +void PdfParser::pushResources(Dict *resDict) { + res = new GfxResources(xref, resDict, res); +} + +void PdfParser::popResources() { + GfxResources *resPtr; + + resPtr = res->getNext(); + delete res; + res = resPtr; +} + +void PdfParser::setDefaultApproximationPrecision() { + for (int i = 1; i <= pdfNumShadingTypes; ++i) { + setApproximationPrecision(i, defaultShadingColorDelta, defaultShadingMaxDepth); + } +} + +void PdfParser::setApproximationPrecision(int shadingType, double colorDelta, + int maxDepth) { + + if (shadingType > pdfNumShadingTypes || shadingType < 1) { + return; + } + colorDeltas[shadingType-1] = dblToCol(colorDelta); + maxDepths[shadingType-1] = maxDepth; +} + +//------------------------------------------------------------------------ +// ClipHistoryEntry +//------------------------------------------------------------------------ + +ClipHistoryEntry::ClipHistoryEntry(GfxPath *clipPathA, GfxClipType clipTypeA) : + saved(nullptr), + clipPath((clipPathA) ? clipPathA->copy() : nullptr), + clipType(clipTypeA) +{ +} + +ClipHistoryEntry::~ClipHistoryEntry() +{ + if (clipPath) { + delete clipPath; + clipPath = nullptr; + } +} + +void ClipHistoryEntry::setClip(_POPPLER_CONST_83 GfxPath *clipPathA, GfxClipType clipTypeA) { + // Free previous clip path + if (clipPath) { + delete clipPath; + } + if (clipPathA) { + clipPath = clipPathA->copy(); + clipType = clipTypeA; + } else { + clipPath = nullptr; + clipType = clipNormal; + } +} + +ClipHistoryEntry *ClipHistoryEntry::save() { + ClipHistoryEntry *newEntry = new ClipHistoryEntry(this); + newEntry->saved = this; + + return newEntry; +} + +ClipHistoryEntry *ClipHistoryEntry::restore() { + ClipHistoryEntry *oldEntry; + + if (saved) { + oldEntry = saved; + saved = nullptr; + delete this; // TODO really should avoid deleting from inside. + } else { + oldEntry = this; + } + + return oldEntry; +} + +ClipHistoryEntry::ClipHistoryEntry(ClipHistoryEntry *other) { + if (other->clipPath) { + this->clipPath = other->clipPath->copy(); + this->clipType = other->clipType; + } else { + this->clipPath = nullptr; + this->clipType = clipNormal; + } + saved = nullptr; +} + +#endif /* HAVE_POPPLER */ diff --git a/src/extension/internal/pdfinput/pdf-parser.h b/src/extension/internal/pdfinput/pdf-parser.h new file mode 100644 index 0000000..b92c415 --- /dev/null +++ b/src/extension/internal/pdfinput/pdf-parser.h @@ -0,0 +1,356 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * PDF parsing using libpoppler. + *//* + * Authors: + * see git history + * + * Derived from Gfx.h from poppler (?) which derives from Xpdf, Copyright 1996-2003 Glyph & Cog, LLC, which is under GPL2+. + * + * Copyright (C) 2018 Authors + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#ifndef PDF_PARSER_H +#define PDF_PARSER_H + +#ifdef HAVE_CONFIG_H +# include "config.h" // only include where actually required! +#endif + +#ifdef HAVE_POPPLER +#include "poppler-transition-api.h" + +#ifdef USE_GCC_PRAGMAS +#pragma interface +#endif + +namespace Inkscape { + namespace Extension { + namespace Internal { + class SvgBuilder; + } + } +} + +// TODO clean up and remove using: +using Inkscape::Extension::Internal::SvgBuilder; + +#include "glib/poppler-features.h" +#include "Object.h" + +#include +#include +#include + +class GooString; +class XRef; +class Array; +class Stream; +class Parser; +class Dict; +class Function; +class OutputDev; +class GfxFontDict; +class GfxFont; +class GfxPattern; +class GfxTilingPattern; +class GfxShadingPattern; +class GfxShading; +class GfxFunctionShading; +class GfxAxialShading; +class GfxRadialShading; +class GfxGouraudTriangleShading; +class GfxPatchMeshShading; +struct GfxPatch; +class GfxState; +struct GfxColor; +class GfxColorSpace; +class Gfx; +class GfxResources; +class PDFRectangle; +class AnnotBorderStyle; + +class PdfParser; + +class ClipHistoryEntry; + +//------------------------------------------------------------------------ + +#ifndef GFX_H +enum GfxClipType { + clipNone, + clipNormal, + clipEO +}; + +enum TchkType { + tchkBool, // boolean + tchkInt, // integer + tchkNum, // number (integer or real) + tchkString, // string + tchkName, // name + tchkArray, // array + tchkProps, // properties (dictionary or name) + tchkSCN, // scn/SCN args (number of name) + tchkNone // used to avoid empty initializer lists +}; +#endif /* GFX_H */ + +#define maxOperatorArgs 33 + +struct PdfOperator { + char name[4]; + int numArgs; + TchkType tchk[maxOperatorArgs]; + void (PdfParser::*func)(Object args[], int numArgs); +}; + +#undef maxOperatorArgs + +struct OpHistoryEntry { + const char *name; // operator's name + GfxState *state; // saved state, NULL if none + GBool executed; // whether the operator has been executed + + OpHistoryEntry *next; // next entry on stack + unsigned depth; // total number of entries descending from this +}; + +//------------------------------------------------------------------------ +// PdfParser +//------------------------------------------------------------------------ + +//------------------------------------------------------------------------ +// constants +//------------------------------------------------------------------------ + +#define pdfFunctionShading 1 +#define pdfAxialShading 2 +#define pdfRadialShading 3 +#define pdfGouraudTriangleShading 4 +#define pdfPatchMeshShading 5 +#define pdfNumShadingTypes 5 + + + +/** + * PDF parsing module using libpoppler's facilities. + */ +class PdfParser { +public: + + // Constructor for regular output. + PdfParser(XRef *xrefA, SvgBuilder *builderA, int pageNum, int rotate, + Dict *resDict, + _POPPLER_CONST PDFRectangle *box, + _POPPLER_CONST PDFRectangle *cropBox); + + // Constructor for a sub-page object. + PdfParser(XRef *xrefA, Inkscape::Extension::Internal::SvgBuilder *builderA, + Dict *resDict, + _POPPLER_CONST PDFRectangle *box); + + virtual ~PdfParser(); + + // Interpret a stream or array of streams. + void parse(Object *obj, GBool topLevel = gTrue); + + // Save graphics state. + void saveState(); + + // Restore graphics state. + void restoreState(); + + // Get the current graphics state object. + GfxState *getState() { return state; } + + // Set the precision of approximation for specific shading fills. + void setApproximationPrecision(int shadingType, double colorDelta, int maxDepth); + +private: + + XRef *xref; // the xref table for this PDF file + SvgBuilder *builder; // SVG generator + GBool subPage; // is this a sub-page object? + GBool printCommands; // print the drawing commands (for debugging) + GfxResources *res; // resource stack + + GfxState *state; // current graphics state + GBool fontChanged; // set if font or text matrix has changed + GfxClipType clip; // do a clip? + int ignoreUndef; // current BX/EX nesting level + double baseMatrix[6]; // default matrix for most recent + // page/form/pattern + int formDepth; + + Parser *parser; // parser for page content stream(s) + + static PdfOperator opTab[]; // table of operators + + int colorDeltas[pdfNumShadingTypes]; + // max deltas allowed in any color component + // for the approximation of shading fills + int maxDepths[pdfNumShadingTypes]; // max recursive depths + + ClipHistoryEntry *clipHistory; // clip path stack + OpHistoryEntry *operatorHistory; // list containing the last N operators + + //! Caches color spaces by name + std::map> colorSpacesCache; + + GfxColorSpace *lookupColorSpaceCopy(Object &); + + void setDefaultApproximationPrecision(); // init color deltas + void pushOperator(const char *name); + OpHistoryEntry *popOperator(); + const char *getPreviousOperator(unsigned int look_back=1); // returns the nth previous operator's name + + void go(GBool topLevel); + void execOp(Object *cmd, Object args[], int numArgs); + PdfOperator *findOp(const char *name); + GBool checkArg(Object *arg, TchkType type); + int getPos(); + + // graphics state operators + void opSave(Object args[], int numArgs); + void opRestore(Object args[], int numArgs); + void opConcat(Object args[], int numArgs); + void opSetDash(Object args[], int numArgs); + void opSetFlat(Object args[], int numArgs); + void opSetLineJoin(Object args[], int numArgs); + void opSetLineCap(Object args[], int numArgs); + void opSetMiterLimit(Object args[], int numArgs); + void opSetLineWidth(Object args[], int numArgs); + void opSetExtGState(Object args[], int numArgs); + void doSoftMask(Object *str, GBool alpha, + GfxColorSpace *blendingColorSpace, + GBool isolated, GBool knockout, + Function *transferFunc, GfxColor *backdropColor); + void opSetRenderingIntent(Object args[], int numArgs); + + // color operators + void opSetFillGray(Object args[], int numArgs); + void opSetStrokeGray(Object args[], int numArgs); + void opSetFillCMYKColor(Object args[], int numArgs); + void opSetStrokeCMYKColor(Object args[], int numArgs); + void opSetFillRGBColor(Object args[], int numArgs); + void opSetStrokeRGBColor(Object args[], int numArgs); + void opSetFillColorSpace(Object args[], int numArgs); + void opSetStrokeColorSpace(Object args[], int numArgs); + void opSetFillColor(Object args[], int numArgs); + void opSetStrokeColor(Object args[], int numArgs); + void opSetFillColorN(Object args[], int numArgs); + void opSetStrokeColorN(Object args[], int numArgs); + + // path segment operators + void opMoveTo(Object args[], int numArgs); + void opLineTo(Object args[], int numArgs); + void opCurveTo(Object args[], int numArgs); + void opCurveTo1(Object args[], int numArgs); + void opCurveTo2(Object args[], int numArgs); + void opRectangle(Object args[], int numArgs); + void opClosePath(Object args[], int numArgs); + + // path painting operators + void opEndPath(Object args[], int numArgs); + void opStroke(Object args[], int numArgs); + void opCloseStroke(Object args[], int numArgs); + void opFill(Object args[], int numArgs); + void opEOFill(Object args[], int numArgs); + void opFillStroke(Object args[], int numArgs); + void opCloseFillStroke(Object args[], int numArgs); + void opEOFillStroke(Object args[], int numArgs); + void opCloseEOFillStroke(Object args[], int numArgs); + void doFillAndStroke(GBool eoFill); + void doPatternFillFallback(GBool eoFill); + void doPatternStrokeFallback(); + void doShadingPatternFillFallback(GfxShadingPattern *sPat, + GBool stroke, GBool eoFill); + void opShFill(Object args[], int numArgs); + void doFunctionShFill(GfxFunctionShading *shading); + void doFunctionShFill1(GfxFunctionShading *shading, + double x0, double y0, + double x1, double y1, + GfxColor *colors, int depth); + void doGouraudTriangleShFill(GfxGouraudTriangleShading *shading); + void gouraudFillTriangle(double x0, double y0, GfxColor *color0, + double x1, double y1, GfxColor *color1, + double x2, double y2, GfxColor *color2, + int nComps, int depth); + void doPatchMeshShFill(GfxPatchMeshShading *shading); + void fillPatch(_POPPLER_CONST GfxPatch *patch, int nComps, int depth); + void doEndPath(); + + // path clipping operators + void opClip(Object args[], int numArgs); + void opEOClip(Object args[], int numArgs); + + // text object operators + void opBeginText(Object args[], int numArgs); + void opEndText(Object args[], int numArgs); + + // text state operators + void opSetCharSpacing(Object args[], int numArgs); + void opSetFont(Object args[], int numArgs); + void opSetTextLeading(Object args[], int numArgs); + void opSetTextRender(Object args[], int numArgs); + void opSetTextRise(Object args[], int numArgs); + void opSetWordSpacing(Object args[], int numArgs); + void opSetHorizScaling(Object args[], int numArgs); + + // text positioning operators + void opTextMove(Object args[], int numArgs); + void opTextMoveSet(Object args[], int numArgs); + void opSetTextMatrix(Object args[], int numArgs); + void opTextNextLine(Object args[], int numArgs); + + // text string operators + void opShowText(Object args[], int numArgs); + void opMoveShowText(Object args[], int numArgs); + void opMoveSetShowText(Object args[], int numArgs); + void opShowSpaceText(Object args[], int numArgs); +#if POPPLER_CHECK_VERSION(0,64,0) + void doShowText(const GooString *s); +#else + void doShowText(GooString *s); +#endif + + + // XObject operators + void opXObject(Object args[], int numArgs); + void doImage(Object *ref, Stream *str, GBool inlineImg); + void doForm(Object *str); + void doForm1(Object *str, Dict *resDict, double *matrix, double *bbox, + GBool transpGroup = gFalse, GBool softMask = gFalse, + GfxColorSpace *blendingColorSpace = nullptr, + GBool isolated = gFalse, GBool knockout = gFalse, + GBool alpha = gFalse, Function *transferFunc = nullptr, + GfxColor *backdropColor = nullptr); + + // in-line image operators + void opBeginImage(Object args[], int numArgs); + Stream *buildImageStream(); + void opImageData(Object args[], int numArgs); + void opEndImage(Object args[], int numArgs); + + // type 3 font operators + void opSetCharWidth(Object args[], int numArgs); + void opSetCacheDevice(Object args[], int numArgs); + + // compatibility operators + void opBeginIgnoreUndef(Object args[], int numArgs); + void opEndIgnoreUndef(Object args[], int numArgs); + + // marked content operators + void opBeginMarkedContent(Object args[], int numArgs); + void opEndMarkedContent(Object args[], int numArgs); + void opMarkPoint(Object args[], int numArgs); + + void pushResources(Dict *resDict); + void popResources(); +}; + +#endif /* HAVE_POPPLER */ + +#endif /* PDF_PARSER_H */ diff --git a/src/extension/internal/pdfinput/poppler-transition-api.h b/src/extension/internal/pdfinput/poppler-transition-api.h new file mode 100644 index 0000000..dc9e47e --- /dev/null +++ b/src/extension/internal/pdfinput/poppler-transition-api.h @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * TODO short description + *//* + * Authors: + * see git history + * + * Copyright (C) 2018 Authors + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#ifndef SEEN_POPPLER_TRANSITION_API_H +#define SEEN_POPPLER_TRANSITION_API_H + +#include + +#if POPPLER_CHECK_VERSION(22, 4, 0) +#define _POPPLER_FONTPTR_TO_GFX8(font_ptr) ((Gfx8BitFont *)font_ptr.get()) +#else +#define _POPPLER_FONTPTR_TO_GFX8(font_ptr) ((Gfx8BitFont *)font_ptr) +#endif + +#if POPPLER_CHECK_VERSION(22, 3, 0) +#define _POPPLER_MAKE_SHARED_PDFDOC(uri) std::make_shared(std::make_unique(uri)) +#else +#define _POPPLER_MAKE_SHARED_PDFDOC(uri) std::make_shared(new GooString(uri), nullptr, nullptr, nullptr) +#endif + +#if POPPLER_CHECK_VERSION(0, 83, 0) +#define _POPPLER_CONST_83 const +#else +#define _POPPLER_CONST_83 +#endif + +#if POPPLER_CHECK_VERSION(0, 82, 0) +#define _POPPLER_CONST_82 const +#else +#define _POPPLER_CONST_82 +#endif + +#if POPPLER_CHECK_VERSION(0, 76, 0) +#define _POPPLER_NEW_PARSER(xref, obj) Parser(xref, obj, gFalse) +#else +#define _POPPLER_NEW_PARSER(xref, obj) Parser(xref, new Lexer(xref, obj), gFalse) +#endif + +#if POPPLER_CHECK_VERSION(0, 83, 0) +#define _POPPLER_NEW_GLOBAL_PARAMS(args...) std::unique_ptr(new GlobalParams(args)) +#else +#define _POPPLER_NEW_GLOBAL_PARAMS(args...) new GlobalParams(args) +#endif + + +#if POPPLER_CHECK_VERSION(0, 72, 0) +#define getCString c_str +#endif + +#if POPPLER_CHECK_VERSION(0,71,0) +typedef bool GBool; +#define gTrue true +#define gFalse false +#endif + +#if POPPLER_CHECK_VERSION(0,70,0) +#define _POPPLER_CONST const +#else +#define _POPPLER_CONST +#endif + +#if POPPLER_CHECK_VERSION(0,69,0) +#define _POPPLER_DICTADD(dict, key, obj) (dict).dictAdd(key, std::move(obj)) +#elif POPPLER_CHECK_VERSION(0,58,0) +#define _POPPLER_DICTADD(dict, key, obj) (dict).dictAdd(copyString(key), std::move(obj)) +#else +#define _POPPLER_DICTADD(dict, key, obj) (dict).dictAdd(copyString(key), &obj) +#endif + +#if POPPLER_CHECK_VERSION(0,58,0) +#define POPPLER_NEW_OBJECT_API +#define _POPPLER_FREE(obj) +#define _POPPLER_CALL(ret, func) (ret = func()) +#define _POPPLER_CALL_ARGS(ret, func, ...) (ret = func(__VA_ARGS__)) +#define _POPPLER_CALL_ARGS_DEREF _POPPLER_CALL_ARGS +#else +#define _POPPLER_FREE(obj) (obj).free() +#define _POPPLER_CALL(ret, func) (*func(&ret)) +#define _POPPLER_CALL_ARGS(ret, func, ...) (func(__VA_ARGS__, &ret)) +#define _POPPLER_CALL_ARGS_DEREF(...) (*_POPPLER_CALL_ARGS(__VA_ARGS__)) +#endif + +#if !POPPLER_CHECK_VERSION(0, 29, 0) +#error "Requires poppler >= 0.29" +#endif + +#endif diff --git a/src/extension/internal/pdfinput/svg-builder.cpp b/src/extension/internal/pdfinput/svg-builder.cpp new file mode 100644 index 0000000..9c49d37 --- /dev/null +++ b/src/extension/internal/pdfinput/svg-builder.cpp @@ -0,0 +1,1983 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Native PDF import using libpoppler. + * + * Authors: + * miklos erdelyi + * Jon A. Cruz + * + * 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 + +#ifdef HAVE_POPPLER + +#include "svg-builder.h" +#include "pdf-parser.h" + +#include "document.h" +#include "object/sp-namedview.h" +#include "png.h" + +#include "xml/document.h" +#include "xml/node.h" +#include "xml/repr.h" +#include "svg/svg.h" +#include "svg/path-string.h" +#include "svg/css-ostringstream.h" +#include "svg/svg-color.h" +#include "color.h" +#include "util/units.h" +#include "display/nr-filter-utils.h" +#include "libnrtype/font-instance.h" +#include "object/sp-defs.h" + +#include "Function.h" +#include "GfxState.h" +#include "GfxFont.h" +#include "Stream.h" +#include "Page.h" +#include "UnicodeMap.h" +#include "GlobalParams.h" + +namespace Inkscape { +namespace Extension { +namespace Internal { + +//#define IFTRACE(_code) _code +#define IFTRACE(_code) + +#define TRACE(_args) IFTRACE(g_print _args) + +/** + * \struct SvgTransparencyGroup + * \brief Holds information about a PDF transparency group + */ +struct SvgTransparencyGroup { + double bbox[6]; // TODO should this be 4? + Inkscape::XML::Node *container; + + bool isolated; + bool knockout; + bool for_softmask; + + SvgTransparencyGroup *next; +}; + +/** + * \class SvgBuilder + * + */ + +SvgBuilder::SvgBuilder(SPDocument *document, gchar *docname, XRef *xref) +{ + _is_top_level = true; + _doc = document; + _docname = docname; + _xref = xref; + _xml_doc = _doc->getReprDoc(); + _container = _root = _doc->getReprRoot(); + _init(); + + // Set default preference settings + _preferences = _xml_doc->createElement("svgbuilder:prefs"); + _preferences->setAttribute("embedImages", "1"); + _preferences->setAttribute("localFonts", "1"); +} + +SvgBuilder::SvgBuilder(SvgBuilder *parent, Inkscape::XML::Node *root) { + _is_top_level = false; + _doc = parent->_doc; + _docname = parent->_docname; + _xref = parent->_xref; + _xml_doc = parent->_xml_doc; + _preferences = parent->_preferences; + _container = this->_root = root; + _init(); +} + +SvgBuilder::~SvgBuilder() = default; + +void SvgBuilder::_init() { + _font_style = nullptr; + _font_specification = nullptr; + _font_scaling = 1; + _need_font_update = true; + _in_text_object = false; + _invalidated_style = true; + _current_state = nullptr; + _width = 0; + _height = 0; + + // Fill _availableFontNames (Bug LP #179589) (code cfr. FontLister) + std::vector families; + font_factory::Default()->GetUIFamilies(families); + for (auto & familie : families) { + _availableFontNames.emplace_back(pango_font_family_get_name(familie)); + } + + _transp_group_stack = nullptr; + SvgGraphicsState initial_state; + initial_state.softmask = nullptr; + initial_state.group_depth = 0; + _state_stack.push_back(initial_state); + _node_stack.push_back(_container); + + _ttm[0] = 1; _ttm[1] = 0; _ttm[2] = 0; _ttm[3] = 1; _ttm[4] = 0; _ttm[5] = 0; + _ttm_is_set = false; +} + +/** + * We're creating a multi-page document, push page number. + */ +void SvgBuilder::pushPage() { + // Move page over by the last page width + if (_page && this->_width) { + int gap = 20; + _page_left += this->_width + gap; + // TODO: A more interesting page layout could be implemented here. + } + _page_num += 1; + _page_offset = true; + + if (_page) { + Inkscape::GC::release(_page); + } + _page = _xml_doc->createElement("inkscape:page"); + _page->setAttributeSvgDouble("x", _page_left); + _page->setAttributeSvgDouble("y", _page_top); + auto _nv = _doc->getNamedView()->getRepr(); + _nv->appendChild(_page); +} + +void SvgBuilder::setDocumentSize(double width, double height) { + this->_width = width; + this->_height = height; + + if (_page_num < 2) { + _root->setAttributeSvgDouble("width", width); + _root->setAttributeSvgDouble("height", height); + } + if (_page) { + _page->setAttributeSvgDouble("width", width); + _page->setAttributeSvgDouble("height", height); + } +} + +/** + * \brief Sets groupmode of the current container to 'layer' and sets its label if given + */ +void SvgBuilder::setAsLayer(char *layer_name) { + _container->setAttribute("inkscape:groupmode", "layer"); + if (layer_name) { + _container->setAttribute("inkscape:label", layer_name); + } +} + +/** + * \brief Sets the current container's opacity + */ +void SvgBuilder::setGroupOpacity(double opacity) { + _container->setAttributeSvgDouble("opacity", CLAMP(opacity, 0.0, 1.0)); +} + +void SvgBuilder::saveState() { + SvgGraphicsState new_state; + new_state.group_depth = 0; + new_state.softmask = _state_stack.back().softmask; + _state_stack.push_back(new_state); + pushGroup(); +} + +void SvgBuilder::restoreState() { + while( _state_stack.back().group_depth > 0 ) { + popGroup(); + } + _state_stack.pop_back(); +} + +Inkscape::XML::Node *SvgBuilder::pushNode(const char *name) { + Inkscape::XML::Node *node = _xml_doc->createElement(name); + _node_stack.push_back(node); + _container = node; + return node; +} + +Inkscape::XML::Node *SvgBuilder::popNode() { + Inkscape::XML::Node *node = nullptr; + if ( _node_stack.size() > 1 ) { + node = _node_stack.back(); + _node_stack.pop_back(); + _container = _node_stack.back(); // Re-set container + } else { + TRACE(("popNode() called when stack is empty\n")); + node = _root; + } + return node; +} + +Inkscape::XML::Node *SvgBuilder::pushGroup() { + Inkscape::XML::Node *saved_container = _container; + Inkscape::XML::Node *node = pushNode("svg:g"); + saved_container->appendChild(node); + Inkscape::GC::release(node); + _state_stack.back().group_depth++; + // Set as a layer if this is a top-level group + if ( _container->parent() == _root && _is_top_level ) { + static int layer_count = 1; + if (_page_num) { + gchar *layer_name = g_strdup_printf("Page %d", _page_num); + setAsLayer(layer_name); + g_free(layer_name); + } else if ( layer_count > 1 ) { + gchar *layer_name = g_strdup_printf("%s%d", _docname, layer_count); + setAsLayer(layer_name); + g_free(layer_name); + layer_count++; + } else { + setAsLayer(_docname); + layer_count++; + } + } + if (_container->parent()->attribute("inkscape:groupmode") != nullptr) { + _ttm[0] = _ttm[3] = 1.0; // clear ttm if parent is a layer + _ttm[1] = _ttm[2] = _ttm[4] = _ttm[5] = 0.0; + _ttm_is_set = false; + } + return _container; +} + +Inkscape::XML::Node *SvgBuilder::popGroup() { + if (_container != _root) { // Pop if the current container isn't root + popNode(); + _state_stack.back().group_depth--; + } + + return _container; +} + +Inkscape::XML::Node *SvgBuilder::getContainer() { + return _container; +} + +static gchar *svgConvertRGBToText(double r, double g, double b) { + using Inkscape::Filters::clamp; + static gchar tmp[1023] = {0}; + snprintf(tmp, 1023, + "#%02x%02x%02x", + clamp(SP_COLOR_F_TO_U(r)), + clamp(SP_COLOR_F_TO_U(g)), + clamp(SP_COLOR_F_TO_U(b))); + return (gchar *)&tmp; +} + +static gchar *svgConvertGfxRGB(GfxRGB *color) { + double r = (double)color->r / 65535.0; + double g = (double)color->g / 65535.0; + double b = (double)color->b / 65535.0; + return svgConvertRGBToText(r, g, b); +} + +static void svgSetTransform(Inkscape::XML::Node *node, Geom::Affine matrix) { + node->setAttributeOrRemoveIfEmpty("transform", sp_svg_transform_write(matrix)); +} + +/** + * \brief Generates a SVG path string from poppler's data structure + */ +static gchar *svgInterpretPath(_POPPLER_CONST_83 GfxPath *path) { + Inkscape::SVG::PathString pathString; + for (int i = 0 ; i < path->getNumSubpaths() ; ++i ) { + _POPPLER_CONST_83 GfxSubpath *subpath = path->getSubpath(i); + if (subpath->getNumPoints() > 0) { + pathString.moveTo(subpath->getX(0), subpath->getY(0)); + int j = 1; + while (j < subpath->getNumPoints()) { + if (subpath->getCurve(j)) { + pathString.curveTo(subpath->getX(j), subpath->getY(j), + subpath->getX(j+1), subpath->getY(j+1), + subpath->getX(j+2), subpath->getY(j+2)); + + j += 3; + } else { + pathString.lineTo(subpath->getX(j), subpath->getY(j)); + ++j; + } + } + if (subpath->isClosed()) { + pathString.closePath(); + } + } + } + + return g_strdup(pathString.c_str()); +} + +/** + * \brief Sets stroke style from poppler's GfxState data structure + * Uses the given SPCSSAttr for storing the style properties + */ +void SvgBuilder::_setStrokeStyle(SPCSSAttr *css, GfxState *state) { + // Stroke color/pattern + if ( state->getStrokeColorSpace()->getMode() == csPattern ) { + gchar *urltext = _createPattern(state->getStrokePattern(), state, true); + sp_repr_css_set_property(css, "stroke", urltext); + if (urltext) { + g_free(urltext); + } + } else { + GfxRGB stroke_color; + state->getStrokeRGB(&stroke_color); + sp_repr_css_set_property(css, "stroke", svgConvertGfxRGB(&stroke_color)); + } + + // Opacity + Inkscape::CSSOStringStream os_opacity; + os_opacity << state->getStrokeOpacity(); + sp_repr_css_set_property(css, "stroke-opacity", os_opacity.str().c_str()); + + // Line width + Inkscape::CSSOStringStream os_width; + double lw = state->getLineWidth(); + if (lw > 0.0) { + os_width << lw; + } else { + // emit a stroke which is 1px in toplevel user units + double pxw = Inkscape::Util::Quantity::convert(1.0, "pt", "px"); + os_width << 1.0 / state->transformWidth(pxw); + } + sp_repr_css_set_property(css, "stroke-width", os_width.str().c_str()); + + // Line cap + switch (state->getLineCap()) { + case 0: + sp_repr_css_set_property(css, "stroke-linecap", "butt"); + break; + case 1: + sp_repr_css_set_property(css, "stroke-linecap", "round"); + break; + case 2: + sp_repr_css_set_property(css, "stroke-linecap", "square"); + break; + } + + // Line join + switch (state->getLineJoin()) { + case 0: + sp_repr_css_set_property(css, "stroke-linejoin", "miter"); + break; + case 1: + sp_repr_css_set_property(css, "stroke-linejoin", "round"); + break; + case 2: + sp_repr_css_set_property(css, "stroke-linejoin", "bevel"); + break; + } + + // Miterlimit + Inkscape::CSSOStringStream os_ml; + os_ml << state->getMiterLimit(); + sp_repr_css_set_property(css, "stroke-miterlimit", os_ml.str().c_str()); + + // Line dash + int dash_length; + double dash_start; +#if POPPLER_CHECK_VERSION(22, 9, 0) + const double *dash_pattern; + const std::vector &dash = state->getLineDash(&dash_start); + dash_pattern = dash.data(); + dash_length = dash.size(); +#else + double *dash_pattern; + state->getLineDash(&dash_pattern, &dash_length, &dash_start); +#endif + if ( dash_length > 0 ) { + Inkscape::CSSOStringStream os_array; + for ( int i = 0 ; i < dash_length ; i++ ) { + os_array << dash_pattern[i]; + if (i < (dash_length - 1)) { + os_array << ","; + } + } + sp_repr_css_set_property(css, "stroke-dasharray", os_array.str().c_str()); + + Inkscape::CSSOStringStream os_offset; + os_offset << dash_start; + sp_repr_css_set_property(css, "stroke-dashoffset", os_offset.str().c_str()); + } else { + sp_repr_css_set_property(css, "stroke-dasharray", "none"); + sp_repr_css_set_property(css, "stroke-dashoffset", nullptr); + } +} + +/** + * \brief Sets fill style from poppler's GfxState data structure + * Uses the given SPCSSAttr for storing the style properties. + */ +void SvgBuilder::_setFillStyle(SPCSSAttr *css, GfxState *state, bool even_odd) { + + // Fill color/pattern + if ( state->getFillColorSpace()->getMode() == csPattern ) { + gchar *urltext = _createPattern(state->getFillPattern(), state); + sp_repr_css_set_property(css, "fill", urltext); + if (urltext) { + g_free(urltext); + } + } else { + GfxRGB fill_color; + state->getFillRGB(&fill_color); + sp_repr_css_set_property(css, "fill", svgConvertGfxRGB(&fill_color)); + } + + // Opacity + Inkscape::CSSOStringStream os_opacity; + os_opacity << state->getFillOpacity(); + sp_repr_css_set_property(css, "fill-opacity", os_opacity.str().c_str()); + + // Fill rule + sp_repr_css_set_property(css, "fill-rule", even_odd ? "evenodd" : "nonzero"); +} + +/** + * \brief Sets blend style properties from poppler's GfxState data structure + * \update a SPCSSAttr with all mix-blend-mode set + */ +void SvgBuilder::_setBlendMode(Inkscape::XML::Node *node, GfxState *state) +{ + SPCSSAttr *css = sp_repr_css_attr(node, "style"); + GfxBlendMode blendmode = state->getBlendMode(); + if (blendmode) { + sp_repr_css_set_property(css, "mix-blend-mode", enum_blend_mode[blendmode].key); + } + Glib::ustring value; + sp_repr_css_write_string(css, value); + node->setAttributeOrRemoveIfEmpty("style", value); + sp_repr_css_attr_unref(css); +} +/** + * \brief Sets style properties from poppler's GfxState data structure + * \return SPCSSAttr with all the relevant properties set + */ +SPCSSAttr *SvgBuilder::_setStyle(GfxState *state, bool fill, bool stroke, bool even_odd) { + SPCSSAttr *css = sp_repr_css_attr_new(); + if (fill) { + _setFillStyle(css, state, even_odd); + } else { + sp_repr_css_set_property(css, "fill", "none"); + } + + if (stroke) { + _setStrokeStyle(css, state); + } else { + sp_repr_css_set_property(css, "stroke", "none"); + } + + return css; +} + +/** + * \brief Emits the current path in poppler's GfxState data structure + * Can be used to do filling and stroking at once. + * + * \param fill whether the path should be filled + * \param stroke whether the path should be stroked + * \param even_odd whether the even-odd rule should be used when filling the path + */ +void SvgBuilder::addPath(GfxState *state, bool fill, bool stroke, bool even_odd) { + Inkscape::XML::Node *path = _xml_doc->createElement("svg:path"); + gchar *pathtext = svgInterpretPath(state->getPath()); + path->setAttribute("d", pathtext); + g_free(pathtext); + + // Set style + SPCSSAttr *css = _setStyle(state, fill, stroke, even_odd); + sp_repr_css_change(path, css, "style"); + sp_repr_css_attr_unref(css); + _setBlendMode(path, state); + _container->appendChild(path); + Inkscape::GC::release(path); +} + +/** + * \brief Emits the current path in poppler's GfxState data structure + * The path is set to be filled with the given shading. + */ +void SvgBuilder::addShadedFill(GfxShading *shading, double *matrix, GfxPath *path, + bool even_odd) { + + Inkscape::XML::Node *path_node = _xml_doc->createElement("svg:path"); + gchar *pathtext = svgInterpretPath(path); + path_node->setAttribute("d", pathtext); + g_free(pathtext); + + // Set style + SPCSSAttr *css = sp_repr_css_attr_new(); + gchar *id = _createGradient(shading, matrix, true); + if (id) { + gchar *urltext = g_strdup_printf ("url(#%s)", id); + sp_repr_css_set_property(css, "fill", urltext); + g_free(urltext); + g_free(id); + } else { + sp_repr_css_attr_unref(css); + Inkscape::GC::release(path_node); + return; + } + if (even_odd) { + sp_repr_css_set_property(css, "fill-rule", "evenodd"); + } + sp_repr_css_set_property(css, "stroke", "none"); + sp_repr_css_change(path_node, css, "style"); + sp_repr_css_attr_unref(css); + + _container->appendChild(path_node); + Inkscape::GC::release(path_node); + + // Remove the clipping path emitted before the 'sh' operator + int up_walk = 0; + Inkscape::XML::Node *node = _container->parent(); + while( node && node->childCount() == 1 && up_walk < 3 ) { + gchar const *clip_path_url = node->attribute("clip-path"); + if (clip_path_url) { + // Obtain clipping path's id from the URL + gchar clip_path_id[32]; + strncpy(clip_path_id, clip_path_url + 5, strlen(clip_path_url) - 6); + clip_path_id[sizeof (clip_path_id) - 1] = '\0'; + SPObject *clip_obj = _doc->getObjectById(clip_path_id); + if (clip_obj) { + clip_obj->deleteObject(); + node->removeAttribute("clip-path"); + TRACE(("removed clipping path: %s\n", clip_path_id)); + } + break; + } + node = node->parent(); + up_walk++; + } +} + +/** + * \brief Clips to the current path set in GfxState + * \param state poppler's data structure + * \param even_odd whether the even-odd rule should be applied + */ +void SvgBuilder::clip(GfxState *state, bool even_odd) { + pushGroup(); + setClipPath(state, even_odd); +} + +void SvgBuilder::setClipPath(GfxState *state, bool even_odd) { + // Create the clipPath repr + Inkscape::XML::Node *clip_path = _xml_doc->createElement("svg:clipPath"); + clip_path->setAttribute("clipPathUnits", "userSpaceOnUse"); + // Create the path + Inkscape::XML::Node *path = _xml_doc->createElement("svg:path"); + gchar *pathtext = svgInterpretPath(state->getPath()); + path->setAttribute("d", pathtext); + g_free(pathtext); + if (even_odd) { + path->setAttribute("clip-rule", "evenodd"); + } + clip_path->appendChild(path); + Inkscape::GC::release(path); + // Append clipPath to defs and get id + _doc->getDefs()->getRepr()->appendChild(clip_path); + gchar *urltext = g_strdup_printf ("url(#%s)", clip_path->attribute("id")); + Inkscape::GC::release(clip_path); + _container->setAttribute("clip-path", urltext); + g_free(urltext); +} + +/** + * \brief Fills the given array with the current container's transform, if set + * \param transform array of doubles to be filled + * \return true on success; false on invalid transformation + */ +bool SvgBuilder::getTransform(double *transform) { + Geom::Affine svd; + gchar const *tr = _container->attribute("transform"); + bool valid = sp_svg_transform_read(tr, &svd); + if (valid) { + for ( int i = 0 ; i < 6 ; i++ ) { + transform[i] = svd[i]; + } + return true; + } else { + return false; + } +} + +/** + * \brief Sets the transformation matrix of the current container + */ +void SvgBuilder::setTransform(double c0, double c1, double c2, double c3, + double c4, double c5) { + + auto matrix = Geom::Affine(c0, c1, c2, c3, c4, c5); + + // Add page transformation only once (see scaledCTM in pdf-parser.cpp) + if ( _container->parent() == _root && _is_top_level && _page_offset) { + matrix = matrix * Geom::Translate(_page_left, _page_top); + _page_offset = false; + } + + // do not remember the group which is a layer + if ((_container->attribute("inkscape:groupmode") == nullptr) && !_ttm_is_set) { + _ttm[0] = c0; + _ttm[1] = c1; + _ttm[2] = c2; + _ttm[3] = c3; + _ttm[4] = c4; + _ttm[5] = c5; + _ttm_is_set = true; + } + + // Avoid transforming a group with an already set clip-path + if ( _container->attribute("clip-path") != nullptr ) { + pushGroup(); + } + TRACE(("setTransform: %f %f %f %f %f %f\n", c0, c1, c2, c3, c4, c5)); + svgSetTransform(_container, matrix); +} + +void SvgBuilder::setTransform(double const *transform) { + setTransform(transform[0], transform[1], transform[2], transform[3], + transform[4], transform[5]); +} + +/** + * \brief Checks whether the given pattern type can be represented in SVG + * Used by PdfParser to decide when to do fallback operations. + */ +bool SvgBuilder::isPatternTypeSupported(GfxPattern *pattern) { + if ( pattern != nullptr ) { + if ( pattern->getType() == 2 ) { // shading pattern + GfxShading *shading = (static_cast(pattern))->getShading(); + int shadingType = shading->getType(); + if ( shadingType == 2 || // axial shading + shadingType == 3 ) { // radial shading + return true; + } + return false; + } else if ( pattern->getType() == 1 ) { // tiling pattern + return true; + } + } + + return false; +} + +/** + * \brief Creates a pattern from poppler's data structure + * Handles linear and radial gradients. Creates a new PdfParser and uses it to + * build a tiling pattern. + * \return a url pointing to the created pattern + */ +gchar *SvgBuilder::_createPattern(GfxPattern *pattern, GfxState *state, bool is_stroke) { + gchar *id = nullptr; + if ( pattern != nullptr ) { + if ( pattern->getType() == 2 ) { // Shading pattern + GfxShadingPattern *shading_pattern = static_cast(pattern); + const double *ptm; + double m[6] = {1, 0, 0, 1, 0, 0}; + double det; + + // construct a (pattern space) -> (current space) transform matrix + + ptm = shading_pattern->getMatrix(); + det = _ttm[0] * _ttm[3] - _ttm[1] * _ttm[2]; + if (det) { + double ittm[6]; // invert ttm + ittm[0] = _ttm[3] / det; + ittm[1] = -_ttm[1] / det; + ittm[2] = -_ttm[2] / det; + ittm[3] = _ttm[0] / det; + ittm[4] = (_ttm[2] * _ttm[5] - _ttm[3] * _ttm[4]) / det; + ittm[5] = (_ttm[1] * _ttm[4] - _ttm[0] * _ttm[5]) / det; + m[0] = ptm[0] * ittm[0] + ptm[1] * ittm[2]; + m[1] = ptm[0] * ittm[1] + ptm[1] * ittm[3]; + m[2] = ptm[2] * ittm[0] + ptm[3] * ittm[2]; + m[3] = ptm[2] * ittm[1] + ptm[3] * ittm[3]; + m[4] = ptm[4] * ittm[0] + ptm[5] * ittm[2] + ittm[4]; + m[5] = ptm[4] * ittm[1] + ptm[5] * ittm[3] + ittm[5]; + } + id = _createGradient(shading_pattern->getShading(), + m, + !is_stroke); + } else if ( pattern->getType() == 1 ) { // Tiling pattern + id = _createTilingPattern(static_cast(pattern), state, is_stroke); + } + } else { + return nullptr; + } + gchar *urltext = g_strdup_printf ("url(#%s)", id); + g_free(id); + return urltext; +} + +/** + * \brief Creates a tiling pattern from poppler's data structure + * Creates a sub-page PdfParser and uses it to parse the pattern's content stream. + * \return id of the created pattern + */ +gchar *SvgBuilder::_createTilingPattern(GfxTilingPattern *tiling_pattern, + GfxState *state, bool is_stroke) { + + Inkscape::XML::Node *pattern_node = _xml_doc->createElement("svg:pattern"); + // Set pattern transform matrix + const double *p2u = tiling_pattern->getMatrix(); + double m[6] = {1, 0, 0, 1, 0, 0}; + double det; + det = _ttm[0] * _ttm[3] - _ttm[1] * _ttm[2]; // see LP Bug 1168908 + if (det) { + double ittm[6]; // invert ttm + ittm[0] = _ttm[3] / det; + ittm[1] = -_ttm[1] / det; + ittm[2] = -_ttm[2] / det; + ittm[3] = _ttm[0] / det; + ittm[4] = (_ttm[2] * _ttm[5] - _ttm[3] * _ttm[4]) / det; + ittm[5] = (_ttm[1] * _ttm[4] - _ttm[0] * _ttm[5]) / det; + m[0] = p2u[0] * ittm[0] + p2u[1] * ittm[2]; + m[1] = p2u[0] * ittm[1] + p2u[1] * ittm[3]; + m[2] = p2u[2] * ittm[0] + p2u[3] * ittm[2]; + m[3] = p2u[2] * ittm[1] + p2u[3] * ittm[3]; + m[4] = p2u[4] * ittm[0] + p2u[5] * ittm[2] + ittm[4]; + m[5] = p2u[4] * ittm[1] + p2u[5] * ittm[3] + ittm[5]; + } + Geom::Affine pat_matrix(m[0], m[1], m[2], m[3], m[4], m[5]); + pattern_node->setAttributeOrRemoveIfEmpty("patternTransform", sp_svg_transform_write(pat_matrix)); + pattern_node->setAttribute("patternUnits", "userSpaceOnUse"); + // Set pattern tiling + // FIXME: don't ignore XStep and YStep + const double *bbox = tiling_pattern->getBBox(); + pattern_node->setAttributeSvgDouble("x", 0.0); + pattern_node->setAttributeSvgDouble("y", 0.0); + pattern_node->setAttributeSvgDouble("width", bbox[2] - bbox[0]); + pattern_node->setAttributeSvgDouble("height", bbox[3] - bbox[1]); + + // Convert BBox for PdfParser + PDFRectangle box; + box.x1 = bbox[0]; + box.y1 = bbox[1]; + box.x2 = bbox[2]; + box.y2 = bbox[3]; + // Create new SvgBuilder and sub-page PdfParser + SvgBuilder *pattern_builder = new SvgBuilder(this, pattern_node); + PdfParser *pdf_parser = new PdfParser(_xref, pattern_builder, tiling_pattern->getResDict(), + &box); + // Get pattern color space + GfxPatternColorSpace *pat_cs = (GfxPatternColorSpace *)( is_stroke ? state->getStrokeColorSpace() + : state->getFillColorSpace() ); + // Set fill/stroke colors if this is an uncolored tiling pattern + GfxColorSpace *cs = nullptr; + if ( tiling_pattern->getPaintType() == 2 && ( cs = pat_cs->getUnder() ) ) { + GfxState *pattern_state = pdf_parser->getState(); + pattern_state->setFillColorSpace(cs->copy()); + pattern_state->setFillColor(state->getFillColor()); + pattern_state->setStrokeColorSpace(cs->copy()); + pattern_state->setStrokeColor(state->getFillColor()); + } + + // Generate the SVG pattern + pdf_parser->parse(tiling_pattern->getContentStream()); + + // Cleanup + delete pdf_parser; + delete pattern_builder; + + // Append the pattern to defs + _doc->getDefs()->getRepr()->appendChild(pattern_node); + gchar *id = g_strdup(pattern_node->attribute("id")); + Inkscape::GC::release(pattern_node); + + return id; +} + +/** + * \brief Creates a linear or radial gradient from poppler's data structure + * \param shading poppler's data structure for the shading + * \param matrix gradient transformation, can be null + * \param for_shading true if we're creating this for a shading operator; false otherwise + * \return id of the created object + */ +gchar *SvgBuilder::_createGradient(GfxShading *shading, double *matrix, bool for_shading) { + Inkscape::XML::Node *gradient; + _POPPLER_CONST Function *func; + int num_funcs; + bool extend0, extend1; + + if ( shading->getType() == 2 ) { // Axial shading + gradient = _xml_doc->createElement("svg:linearGradient"); + GfxAxialShading *axial_shading = static_cast(shading); + double x1, y1, x2, y2; + axial_shading->getCoords(&x1, &y1, &x2, &y2); + gradient->setAttributeSvgDouble("x1", x1); + gradient->setAttributeSvgDouble("y1", y1); + gradient->setAttributeSvgDouble("x2", x2); + gradient->setAttributeSvgDouble("y2", y2); + extend0 = axial_shading->getExtend0(); + extend1 = axial_shading->getExtend1(); + num_funcs = axial_shading->getNFuncs(); + func = axial_shading->getFunc(0); + } else if (shading->getType() == 3) { // Radial shading + gradient = _xml_doc->createElement("svg:radialGradient"); + GfxRadialShading *radial_shading = static_cast(shading); + double x1, y1, r1, x2, y2, r2; + radial_shading->getCoords(&x1, &y1, &r1, &x2, &y2, &r2); + // FIXME: the inner circle's radius is ignored here + gradient->setAttributeSvgDouble("fx", x1); + gradient->setAttributeSvgDouble("fy", y1); + gradient->setAttributeSvgDouble("cx", x2); + gradient->setAttributeSvgDouble("cy", y2); + gradient->setAttributeSvgDouble("r", r2); + extend0 = radial_shading->getExtend0(); + extend1 = radial_shading->getExtend1(); + num_funcs = radial_shading->getNFuncs(); + func = radial_shading->getFunc(0); + } else { // Unsupported shading type + return nullptr; + } + gradient->setAttribute("gradientUnits", "userSpaceOnUse"); + // If needed, flip the gradient transform around the y axis + if (matrix) { + Geom::Affine pat_matrix(matrix[0], matrix[1], matrix[2], matrix[3], + matrix[4], matrix[5]); + if ( !for_shading && _is_top_level ) { + Geom::Affine flip(1.0, 0.0, 0.0, -1.0, 0.0, Inkscape::Util::Quantity::convert(_height, "px", "pt")); + pat_matrix *= flip; + } + gradient->setAttributeOrRemoveIfEmpty("gradientTransform", sp_svg_transform_write(pat_matrix)); + } + + if ( extend0 && extend1 ) { + gradient->setAttribute("spreadMethod", "pad"); + } + + if ( num_funcs > 1 || !_addGradientStops(gradient, shading, func) ) { + Inkscape::GC::release(gradient); + return nullptr; + } + + Inkscape::XML::Node *defs = _doc->getDefs()->getRepr(); + defs->appendChild(gradient); + gchar *id = g_strdup(gradient->attribute("id")); + Inkscape::GC::release(gradient); + + return id; +} + +#define EPSILON 0.0001 +/** + * \brief Adds a stop with the given properties to the gradient's representation + */ +void SvgBuilder::_addStopToGradient(Inkscape::XML::Node *gradient, double offset, + GfxRGB *color, double opacity) { + Inkscape::XML::Node *stop = _xml_doc->createElement("svg:stop"); + SPCSSAttr *css = sp_repr_css_attr_new(); + Inkscape::CSSOStringStream os_opacity; + gchar *color_text = nullptr; + if ( _transp_group_stack != nullptr && _transp_group_stack->for_softmask ) { + double gray = (double)color->r / 65535.0; + gray = CLAMP(gray, 0.0, 1.0); + os_opacity << gray; + color_text = (char*) "#ffffff"; + } else { + os_opacity << opacity; + color_text = svgConvertGfxRGB(color); + } + sp_repr_css_set_property(css, "stop-opacity", os_opacity.str().c_str()); + sp_repr_css_set_property(css, "stop-color", color_text); + + sp_repr_css_change(stop, css, "style"); + sp_repr_css_attr_unref(css); + stop->setAttributeCssDouble("offset", offset); + + gradient->appendChild(stop); + Inkscape::GC::release(stop); +} + +static bool svgGetShadingColorRGB(GfxShading *shading, double offset, GfxRGB *result) { + GfxColorSpace *color_space = shading->getColorSpace(); + GfxColor temp; + if ( shading->getType() == 2 ) { // Axial shading + (static_cast(shading))->getColor(offset, &temp); + } else if ( shading->getType() == 3 ) { // Radial shading + (static_cast(shading))->getColor(offset, &temp); + } else { + return false; + } + // Convert it to RGB + color_space->getRGB(&temp, result); + + return true; +} + +#define INT_EPSILON 8 +bool SvgBuilder::_addGradientStops(Inkscape::XML::Node *gradient, GfxShading *shading, + _POPPLER_CONST Function *func) { + int type = func->getType(); + if ( type == 0 || type == 2 ) { // Sampled or exponential function + GfxRGB stop1, stop2; + if ( !svgGetShadingColorRGB(shading, 0.0, &stop1) || + !svgGetShadingColorRGB(shading, 1.0, &stop2) ) { + return false; + } else { + _addStopToGradient(gradient, 0.0, &stop1, 1.0); + _addStopToGradient(gradient, 1.0, &stop2, 1.0); + } + } else if ( type == 3 ) { // Stitching + auto stitchingFunc = static_cast<_POPPLER_CONST StitchingFunction*>(func); + const double *bounds = stitchingFunc->getBounds(); + const double *encode = stitchingFunc->getEncode(); + int num_funcs = stitchingFunc->getNumFuncs(); + + // Add stops from all the stitched functions + GfxRGB prev_color, color; + svgGetShadingColorRGB(shading, bounds[0], &prev_color); + _addStopToGradient(gradient, bounds[0], &prev_color, 1.0); + for ( int i = 0 ; i < num_funcs ; i++ ) { + svgGetShadingColorRGB(shading, bounds[i + 1], &color); + // Add stops + if (stitchingFunc->getFunc(i)->getType() == 2) { // process exponential fxn + double expE = (static_cast<_POPPLER_CONST ExponentialFunction*>(stitchingFunc->getFunc(i)))->getE(); + if (expE > 1.0) { + expE = (bounds[i + 1] - bounds[i])/expE; // approximate exponential as a single straight line at x=1 + if (encode[2*i] == 0) { // normal sequence + _addStopToGradient(gradient, bounds[i + 1] - expE, &prev_color, 1.0); + } else { // reflected sequence + _addStopToGradient(gradient, bounds[i] + expE, &color, 1.0); + } + } + } + _addStopToGradient(gradient, bounds[i + 1], &color, 1.0); + prev_color = color; + } + } else { // Unsupported function type + return false; + } + + return true; +} + +/** + * \brief Sets _invalidated_style to true to indicate that styles have to be updated + * Used for text output when glyphs are buffered till a font change + */ +void SvgBuilder::updateStyle(GfxState *state) { + if (_in_text_object) { + _invalidated_style = true; + _current_state = state; + } +} + +/* + MatchingChars + Count for how many characters s1 matches sp taking into account + that a space in sp may be removed or replaced by some other tokens + specified in the code. (Bug LP #179589) +*/ +static size_t MatchingChars(std::string s1, std::string sp) +{ + size_t is = 0; + size_t ip = 0; + + while(is < s1.length() && ip < sp.length()) { + if (s1[is] == sp[ip]) { + is++; ip++; + } else if (sp[ip] == ' ') { + ip++; + if (s1[is] == '_') { // Valid matches to spaces in sp. + is++; + } + } else { + break; + } + } + return ip; +} + +/* + SvgBuilder::_BestMatchingFont + Scan the available fonts to find the font name that best matches PDFname. + (Bug LP #179589) +*/ +std::string SvgBuilder::_BestMatchingFont(std::string PDFname) +{ + double bestMatch = 0; + std::string bestFontname = "Arial"; + + for (auto fontname : _availableFontNames) { + // At least the first word of the font name should match. + size_t minMatch = fontname.find(" "); + if (minMatch == std::string::npos) { + minMatch = fontname.length(); + } + + size_t Match = MatchingChars(PDFname, fontname); + if (Match >= minMatch) { + double relMatch = (float)Match / (fontname.length() + PDFname.length()); + if (relMatch > bestMatch) { + bestMatch = relMatch; + bestFontname = fontname; + } + } + } + + if (bestMatch == 0) + return PDFname; + else + return bestFontname; +} + +/** + * This array holds info about translating font weight names to more or less CSS equivalents + */ +static char *font_weight_translator[][2] = { + // clang-format off + {(char*) "bold", (char*) "bold"}, + {(char*) "light", (char*) "300"}, + {(char*) "black", (char*) "900"}, + {(char*) "heavy", (char*) "900"}, + {(char*) "ultrabold", (char*) "800"}, + {(char*) "extrabold", (char*) "800"}, + {(char*) "demibold", (char*) "600"}, + {(char*) "semibold", (char*) "600"}, + {(char*) "medium", (char*) "500"}, + {(char*) "book", (char*) "normal"}, + {(char*) "regular", (char*) "normal"}, + {(char*) "roman", (char*) "normal"}, + {(char*) "normal", (char*) "normal"}, + {(char*) "ultralight", (char*) "200"}, + {(char*) "extralight", (char*) "200"}, + {(char*) "thin", (char*) "100"} + // clang-format on +}; + +/** + * \brief Updates _font_style according to the font set in parameter state + */ +void SvgBuilder::updateFont(GfxState *state) { + + TRACE(("updateFont()\n")); + _need_font_update = false; + updateTextMatrix(state); // Ensure that we have a text matrix built + + _font_style = sp_repr_css_attr_new(); + auto font = state->getFont(); + // Store original name + if (font->getName()) { + _font_specification = font->getName()->getCString(); + } else { + _font_specification = "Arial"; + } + + // Prune the font name to get the correct font family name + // In a PDF font names can look like this: IONIPB+MetaPlusBold-Italic + char *font_family = nullptr; + char *font_style = nullptr; + char *font_style_lowercase = nullptr; + const char *plus_sign = strstr(_font_specification, "+"); + if (plus_sign) { + font_family = g_strdup(plus_sign + 1); + _font_specification = plus_sign + 1; + } else { + font_family = g_strdup(_font_specification); + } + char *style_delim = nullptr; + if ( ( style_delim = g_strrstr(font_family, "-") ) || + ( style_delim = g_strrstr(font_family, ",") ) ) { + font_style = style_delim + 1; + font_style_lowercase = g_ascii_strdown(font_style, -1); + style_delim[0] = 0; + } + + // Font family + if (font->getFamily()) { // if font family is explicitly given use it. + sp_repr_css_set_property(_font_style, "font-family", font->getFamily()->getCString()); + } else { + int attr_value = _preferences->getAttributeInt("localFonts", 1); + if (attr_value != 0) { + // Find the font that best matches the stripped down (orig)name (Bug LP #179589). + sp_repr_css_set_property(_font_style, "font-family", _BestMatchingFont(font_family).c_str()); + } else { + sp_repr_css_set_property(_font_style, "font-family", font_family); + } + } + + // Font style + if (font->isItalic()) { + sp_repr_css_set_property(_font_style, "font-style", "italic"); + } else if (font_style) { + if ( strstr(font_style_lowercase, "italic") || + strstr(font_style_lowercase, "slanted") ) { + sp_repr_css_set_property(_font_style, "font-style", "italic"); + } else if (strstr(font_style_lowercase, "oblique")) { + sp_repr_css_set_property(_font_style, "font-style", "oblique"); + } + } + + // Font variant -- default 'normal' value + sp_repr_css_set_property(_font_style, "font-variant", "normal"); + + // Font weight + GfxFont::Weight font_weight = font->getWeight(); + char *css_font_weight = nullptr; + if ( font_weight != GfxFont::WeightNotDefined ) { + if ( font_weight == GfxFont::W400 ) { + css_font_weight = (char*) "normal"; + } else if ( font_weight == GfxFont::W700 ) { + css_font_weight = (char*) "bold"; + } else { + gchar weight_num[4] = "100"; + weight_num[0] = (gchar)( '1' + (font_weight - GfxFont::W100) ); + sp_repr_css_set_property(_font_style, "font-weight", (gchar *)&weight_num); + } + } else if (font_style) { + // Apply the font weight translations + int num_translations = sizeof(font_weight_translator) / ( 2 * sizeof(char *) ); + for ( int i = 0 ; i < num_translations ; i++ ) { + if (strstr(font_style_lowercase, font_weight_translator[i][0])) { + css_font_weight = font_weight_translator[i][1]; + } + } + } else { + css_font_weight = (char*) "normal"; + } + if (css_font_weight) { + sp_repr_css_set_property(_font_style, "font-weight", css_font_weight); + } + g_free(font_family); + if (font_style_lowercase) { + g_free(font_style_lowercase); + } + + // Font stretch + GfxFont::Stretch font_stretch = font->getStretch(); + gchar *stretch_value = nullptr; + switch (font_stretch) { + case GfxFont::UltraCondensed: + stretch_value = (char*) "ultra-condensed"; + break; + case GfxFont::ExtraCondensed: + stretch_value = (char*) "extra-condensed"; + break; + case GfxFont::Condensed: + stretch_value = (char*) "condensed"; + break; + case GfxFont::SemiCondensed: + stretch_value = (char*) "semi-condensed"; + break; + case GfxFont::Normal: + stretch_value = (char*) "normal"; + break; + case GfxFont::SemiExpanded: + stretch_value = (char*) "semi-expanded"; + break; + case GfxFont::Expanded: + stretch_value = (char*) "expanded"; + break; + case GfxFont::ExtraExpanded: + stretch_value = (char*) "extra-expanded"; + break; + case GfxFont::UltraExpanded: + stretch_value = (char*) "ultra-expanded"; + break; + default: + break; + } + if ( stretch_value != nullptr ) { + sp_repr_css_set_property(_font_style, "font-stretch", stretch_value); + } + + // Font size + Inkscape::CSSOStringStream os_font_size; + double css_font_size = _font_scaling * state->getFontSize(); + if ( font->getType() == fontType3 ) { + const double *font_matrix = font->getFontMatrix(); + if ( font_matrix[0] != 0.0 ) { + css_font_size *= font_matrix[3] / font_matrix[0]; + } + } + os_font_size << css_font_size; + sp_repr_css_set_property(_font_style, "font-size", os_font_size.str().c_str()); + + // Writing mode + if ( font->getWMode() == 0 ) { + sp_repr_css_set_property(_font_style, "writing-mode", "lr"); + } else { + sp_repr_css_set_property(_font_style, "writing-mode", "tb"); + } + + _invalidated_style = true; +} + +/** + * \brief Shifts the current text position by the given amount (specified in text space) + */ +void SvgBuilder::updateTextShift(GfxState *state, double shift) { + double shift_value = -shift * 0.001 * fabs(state->getFontSize()); + if (state->getFont()->getWMode()) { + _text_position[1] += shift_value; + } else { + _text_position[0] += shift_value; + } +} + +/** + * \brief Updates current text position + */ +void SvgBuilder::updateTextPosition(double tx, double ty) { + Geom::Point new_position(tx, ty); + _text_position = new_position; +} + +/** + * \brief Flushes the buffered characters + */ +void SvgBuilder::updateTextMatrix(GfxState *state) { + _flushText(); + // Update text matrix + const double *text_matrix = state->getTextMat(); + double w_scale = sqrt( text_matrix[0] * text_matrix[0] + text_matrix[2] * text_matrix[2] ); + double h_scale = sqrt( text_matrix[1] * text_matrix[1] + text_matrix[3] * text_matrix[3] ); + double max_scale; + if ( w_scale > h_scale ) { + max_scale = w_scale; + } else { + max_scale = h_scale; + } + // Calculate new text matrix + Geom::Affine new_text_matrix(text_matrix[0] * state->getHorizScaling(), + text_matrix[1] * state->getHorizScaling(), + -text_matrix[2], -text_matrix[3], + 0.0, 0.0); + + if ( fabs( max_scale - 1.0 ) > EPSILON ) { + // Cancel out scaling by font size in text matrix + for ( int i = 0 ; i < 4 ; i++ ) { + new_text_matrix[i] /= max_scale; + } + } + _text_matrix = new_text_matrix; + _font_scaling = max_scale; +} + +/** + * \brief Writes the buffered characters to the SVG document + */ +void SvgBuilder::_flushText() { + // Ignore empty strings + if ( _glyphs.empty()) { + _glyphs.clear(); + return; + } + std::vector::iterator i = _glyphs.begin(); + const SvgGlyph& first_glyph = (*i); + int render_mode = first_glyph.render_mode; + // Ignore invisible characters + if ( render_mode == 3 ) { + _glyphs.clear(); + return; + } + + Inkscape::XML::Node *text_node = _xml_doc->createElement("svg:text"); + + // we preserve spaces in the text objects we create, this applies to any descendant + text_node->setAttribute("xml:space", "preserve"); + + // Set text matrix + Geom::Affine text_transform(_text_matrix); + text_transform[4] = first_glyph.position[0]; + text_transform[5] = first_glyph.position[1]; + text_node->setAttributeOrRemoveIfEmpty("transform", sp_svg_transform_write(text_transform)); + + bool new_tspan = true; + bool same_coords[2] = {true, true}; + Geom::Point last_delta_pos; + unsigned int glyphs_in_a_row = 0; + Inkscape::XML::Node *tspan_node = nullptr; + Glib::ustring x_coords; + Glib::ustring y_coords; + Glib::ustring text_buffer; + + // Output all buffered glyphs + while (true) { + const SvgGlyph& glyph = (*i); + auto prev_iterator = (i == _glyphs.begin()) ? _glyphs.end() : (i-1); + // Check if we need to make a new tspan + if (glyph.style_changed) { + new_tspan = true; + } else if ( i != _glyphs.begin() ) { + const SvgGlyph& prev_glyph = (*prev_iterator); + if ( !( ( glyph.dy == 0.0 && prev_glyph.dy == 0.0 && + glyph.text_position[1] == prev_glyph.text_position[1] ) || + ( glyph.dx == 0.0 && prev_glyph.dx == 0.0 && + glyph.text_position[0] == prev_glyph.text_position[0] ) ) ) { + new_tspan = true; + } + } + + // Create tspan node if needed + if ( new_tspan || i == _glyphs.end() ) { + if (tspan_node) { + // Set the x and y coordinate arrays + if ( same_coords[0] ) { + tspan_node->setAttributeSvgDouble("x", last_delta_pos[0]); + } else { + tspan_node->setAttributeOrRemoveIfEmpty("x", x_coords); + } + if ( same_coords[1] ) { + tspan_node->setAttributeSvgDouble("y", last_delta_pos[1]); + } else { + tspan_node->setAttributeOrRemoveIfEmpty("y", y_coords); + } + TRACE(("tspan content: %s\n", text_buffer.c_str())); + if ( glyphs_in_a_row > 1 ) { + tspan_node->setAttribute("sodipodi:role", "line"); + } + // Add text content node to tspan + Inkscape::XML::Node *text_content = _xml_doc->createTextNode(text_buffer.c_str()); + tspan_node->appendChild(text_content); + Inkscape::GC::release(text_content); + text_node->appendChild(tspan_node); + // Clear temporary buffers + x_coords.clear(); + y_coords.clear(); + text_buffer.clear(); + Inkscape::GC::release(tspan_node); + glyphs_in_a_row = 0; + } + if ( i == _glyphs.end() ) { + sp_repr_css_attr_unref((*prev_iterator).style); + break; + } else { + tspan_node = _xml_doc->createElement("svg:tspan"); + + /////// + // Create a font specification string and save the attribute in the style + PangoFontDescription *descr = pango_font_description_from_string(glyph.font_specification); + Glib::ustring properFontSpec = font_factory::Default()->ConstructFontSpecification(descr); + pango_font_description_free(descr); + sp_repr_css_set_property(glyph.style, "-inkscape-font-specification", properFontSpec.c_str()); + + // Set style and unref SPCSSAttr if it won't be needed anymore + // assume all nodes in a node share the same style + sp_repr_css_change(text_node, glyph.style, "style"); + if ( glyph.style_changed && i != _glyphs.begin() ) { // Free previous style + sp_repr_css_attr_unref((*prev_iterator).style); + } + } + new_tspan = false; + } + if ( glyphs_in_a_row > 0 && i != _glyphs.begin() ) { + x_coords.append(" "); + y_coords.append(" "); + // Check if we have the same coordinates + const SvgGlyph& prev_glyph = (*prev_iterator); + for ( int p = 0 ; p < 2 ; p++ ) { + if ( glyph.text_position[p] != prev_glyph.text_position[p] ) { + same_coords[p] = false; + } + } + } + // Append the coordinates to their respective strings + Geom::Point delta_pos( glyph.text_position - first_glyph.text_position ); + delta_pos[1] += glyph.rise; + delta_pos[1] *= -1.0; // flip it + delta_pos *= _font_scaling; + Inkscape::CSSOStringStream os_x; + os_x << delta_pos[0]; + x_coords.append(os_x.str()); + Inkscape::CSSOStringStream os_y; + os_y << delta_pos[1]; + y_coords.append(os_y.str()); + last_delta_pos = delta_pos; + + // Append the character to the text buffer + if ( !glyph.code.empty() ) { + text_buffer.append(1, glyph.code[0]); + } + + glyphs_in_a_row++; + ++i; + } + _container->appendChild(text_node); + Inkscape::GC::release(text_node); + + _glyphs.clear(); +} + +void SvgBuilder::beginString(GfxState *state) { + if (_need_font_update) { + updateFont(state); + } + IFTRACE(double *m = state->getTextMat()); + TRACE(("tm: %f %f %f %f %f %f\n",m[0], m[1],m[2], m[3], m[4], m[5])); + IFTRACE(m = state->getCTM()); + TRACE(("ctm: %f %f %f %f %f %f\n",m[0], m[1],m[2], m[3], m[4], m[5])); +} + +/** + * \brief Adds the specified character to the text buffer + * Takes care of converting it to UTF-8 and generates a new style repr if style + * has changed since the last call. + */ +void SvgBuilder::addChar(GfxState *state, double x, double y, + double dx, double dy, + double originX, double originY, + CharCode /*code*/, int /*nBytes*/, Unicode const *u, int uLen) { + + // Skip control characters, found in LaTeX generated PDFs + // https://gitlab.com/inkscape/inkscape/-/issues/1369 + if (uLen > 0 && u[0] < 0x80 && g_ascii_iscntrl(u[0]) && !g_ascii_isspace(u[0])) { + g_warning("Skipping ASCII control character %u", u[0]); + _text_position += Geom::Point(dx, dy); + return; + } + + bool is_space = ( uLen == 1 && u[0] == 32 ); + // Skip beginning space + if ( is_space && _glyphs.empty()) { + Geom::Point delta(dx, dy); + _text_position += delta; + return; + } + // Allow only one space in a row + if ( is_space && (_glyphs[_glyphs.size() - 1].code.size() == 1) && + (_glyphs[_glyphs.size() - 1].code[0] == 32) ) { + Geom::Point delta(dx, dy); + _text_position += delta; + return; + } + + SvgGlyph new_glyph; + new_glyph.is_space = is_space; + new_glyph.position = Geom::Point( x - originX, y - originY ); + new_glyph.text_position = _text_position; + new_glyph.dx = dx; + new_glyph.dy = dy; + Geom::Point delta(dx, dy); + _text_position += delta; + + // Convert the character to UTF-8 since that's our SVG document's encoding + { + gunichar2 uu[8] = {0}; + + for (int i = 0; i < uLen; i++) { + uu[i] = u[i]; + } + + gchar *tmp = g_utf16_to_utf8(uu, uLen, nullptr, nullptr, nullptr); + if ( tmp && *tmp ) { + new_glyph.code = tmp; + } else { + new_glyph.code.clear(); + } + g_free(tmp); + } + + // Copy current style if it has changed since the previous glyph + if (_invalidated_style || _glyphs.empty()) { + new_glyph.style_changed = true; + int render_mode = state->getRender(); + // Set style + bool has_fill = !( render_mode & 1 ); + bool has_stroke = ( render_mode & 3 ) == 1 || ( render_mode & 3 ) == 2; + new_glyph.style = _setStyle(state, has_fill, has_stroke); + // Find a way to handle blend modes on text + /* GfxBlendMode blendmode = state->getBlendMode(); + if (blendmode) { + sp_repr_css_set_property(new_glyph.style, "mix-blend-mode", enum_blend_mode[blendmode].key); + } */ + new_glyph.render_mode = render_mode; + sp_repr_css_merge(new_glyph.style, _font_style); // Merge with font style + _invalidated_style = false; + } else { + new_glyph.style_changed = false; + // Point to previous glyph's style information + const SvgGlyph& prev_glyph = _glyphs.back(); + new_glyph.style = prev_glyph.style; + /* GfxBlendMode blendmode = state->getBlendMode(); + if (blendmode) { + sp_repr_css_set_property(new_glyph.style, "mix-blend-mode", enum_blend_mode[blendmode].key); + } */ + new_glyph.render_mode = prev_glyph.render_mode; + } + new_glyph.font_specification = _font_specification; + new_glyph.rise = state->getRise(); + + _glyphs.push_back(new_glyph); +} + +void SvgBuilder::endString(GfxState * /*state*/) { +} + +void SvgBuilder::beginTextObject(GfxState *state) { + _in_text_object = true; + _invalidated_style = true; // Force copying of current state + _current_state = state; +} + +void SvgBuilder::endTextObject(GfxState * /*state*/) { + _flushText(); + // TODO: clip if render_mode >= 4 + _in_text_object = false; +} + +/** + * Helper functions for supporting direct PNG output into a base64 encoded stream + */ +void png_write_vector(png_structp png_ptr, png_bytep data, png_size_t length) +{ + auto *v_ptr = reinterpret_cast *>(png_get_io_ptr(png_ptr)); // Get pointer to stream + for ( unsigned i = 0 ; i < length ; i++ ) { + v_ptr->push_back(data[i]); + } +} + +/** + * \brief Creates an element containing the given ImageStream as a PNG + * + */ +Inkscape::XML::Node *SvgBuilder::_createImage(Stream *str, int width, int height, + GfxImageColorMap *color_map, bool interpolate, + int *mask_colors, bool alpha_only, + bool invert_alpha) { + + // Create PNG write struct + png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr); + if ( png_ptr == nullptr ) { + return nullptr; + } + // Create PNG info struct + png_infop info_ptr = png_create_info_struct(png_ptr); + if ( info_ptr == nullptr ) { + png_destroy_write_struct(&png_ptr, nullptr); + return nullptr; + } + // Set error handler + if (setjmp(png_jmpbuf(png_ptr))) { + png_destroy_write_struct(&png_ptr, &info_ptr); + return nullptr; + } + // Decide whether we should embed this image + int attr_value = _preferences->getAttributeInt("embedImages", 1); + bool embed_image = ( attr_value != 0 ); + // Set read/write functions + std::vector png_buffer; + FILE *fp = nullptr; + gchar *file_name = nullptr; + if (embed_image) { + png_set_write_fn(png_ptr, &png_buffer, png_write_vector, nullptr); + } else { + static int counter = 0; + file_name = g_strdup_printf("%s_img%d.png", _docname, counter++); + fp = fopen(file_name, "wb"); + if ( fp == nullptr ) { + png_destroy_write_struct(&png_ptr, &info_ptr); + g_free(file_name); + return nullptr; + } + png_init_io(png_ptr, fp); + } + + // Set header data + if ( !invert_alpha && !alpha_only ) { + png_set_invert_alpha(png_ptr); + } + png_color_8 sig_bit; + if (alpha_only) { + png_set_IHDR(png_ptr, info_ptr, + width, + height, + 8, /* bit_depth */ + PNG_COLOR_TYPE_GRAY, + PNG_INTERLACE_NONE, + PNG_COMPRESSION_TYPE_BASE, + PNG_FILTER_TYPE_BASE); + sig_bit.red = 0; + sig_bit.green = 0; + sig_bit.blue = 0; + sig_bit.gray = 8; + sig_bit.alpha = 0; + } else { + png_set_IHDR(png_ptr, info_ptr, + width, + height, + 8, /* bit_depth */ + PNG_COLOR_TYPE_RGB_ALPHA, + PNG_INTERLACE_NONE, + PNG_COMPRESSION_TYPE_BASE, + PNG_FILTER_TYPE_BASE); + sig_bit.red = 8; + sig_bit.green = 8; + sig_bit.blue = 8; + sig_bit.alpha = 8; + } + png_set_sBIT(png_ptr, info_ptr, &sig_bit); + png_set_bgr(png_ptr); + // Write the file header + png_write_info(png_ptr, info_ptr); + + // Convert pixels + ImageStream *image_stream; + if (alpha_only) { + if (color_map) { + image_stream = new ImageStream(str, width, color_map->getNumPixelComps(), + color_map->getBits()); + } else { + image_stream = new ImageStream(str, width, 1, 1); + } + image_stream->reset(); + + // Convert grayscale values + unsigned char *buffer = new unsigned char[width]; + int invert_bit = invert_alpha ? 1 : 0; + for ( int y = 0 ; y < height ; y++ ) { + unsigned char *row = image_stream->getLine(); + if (color_map) { + color_map->getGrayLine(row, buffer, width); + } else { + unsigned char *buf_ptr = buffer; + for ( int x = 0 ; x < width ; x++ ) { + if ( row[x] ^ invert_bit ) { + *buf_ptr++ = 0; + } else { + *buf_ptr++ = 255; + } + } + } + png_write_row(png_ptr, (png_bytep)buffer); + } + delete [] buffer; + } else if (color_map) { + image_stream = new ImageStream(str, width, + color_map->getNumPixelComps(), + color_map->getBits()); + image_stream->reset(); + + // Convert RGB values + unsigned int *buffer = new unsigned int[width]; + if (mask_colors) { + for ( int y = 0 ; y < height ; y++ ) { + unsigned char *row = image_stream->getLine(); + color_map->getRGBLine(row, buffer, width); + + unsigned int *dest = buffer; + for ( int x = 0 ; x < width ; x++ ) { + // Check each color component against the mask + for ( int i = 0; i < color_map->getNumPixelComps() ; i++) { + if ( row[i] < mask_colors[2*i] * 255 || + row[i] > mask_colors[2*i + 1] * 255 ) { + *dest = *dest | 0xff000000; + break; + } + } + // Advance to the next pixel + row += color_map->getNumPixelComps(); + dest++; + } + // Write it to the PNG + png_write_row(png_ptr, (png_bytep)buffer); + } + } else { + for ( int i = 0 ; i < height ; i++ ) { + unsigned char *row = image_stream->getLine(); + memset((void*)buffer, 0xff, sizeof(int) * width); + color_map->getRGBLine(row, buffer, width); + png_write_row(png_ptr, (png_bytep)buffer); + } + } + delete [] buffer; + + } else { // A colormap must be provided, so quit + png_destroy_write_struct(&png_ptr, &info_ptr); + if (!embed_image) { + fclose(fp); + g_free(file_name); + } + return nullptr; + } + delete image_stream; + str->close(); + // Close PNG + png_write_end(png_ptr, info_ptr); + png_destroy_write_struct(&png_ptr, &info_ptr); + + // Create repr + Inkscape::XML::Node *image_node = _xml_doc->createElement("svg:image"); + image_node->setAttributeSvgDouble("width", 1); + image_node->setAttributeSvgDouble("height", 1); + if( !interpolate ) { + SPCSSAttr *css = sp_repr_css_attr_new(); + // This should be changed after CSS4 Images widely supported. + sp_repr_css_set_property(css, "image-rendering", "optimizeSpeed"); + sp_repr_css_change(image_node, css, "style"); + sp_repr_css_attr_unref(css); + } + + // PS/PDF images are placed via a transformation matrix, no preserveAspectRatio used + image_node->setAttribute("preserveAspectRatio", "none"); + + // Set transformation + svgSetTransform(image_node, Geom::Affine(1.0, 0.0, 0.0, -1.0, 0.0, 1.0)); + + // Create href + if (embed_image) { + // Append format specification to the URI + auto *base64String = g_base64_encode(png_buffer.data(), png_buffer.size()); + auto png_data = std::string("data:image/png;base64,") + base64String; + g_free(base64String); + image_node->setAttributeOrRemoveIfEmpty("xlink:href", png_data); + } else { + fclose(fp); + image_node->setAttribute("xlink:href", file_name); + g_free(file_name); + } + + return image_node; +} + +/** + * \brief Creates a with the specified width and height and adds to + * If we're not the top-level SvgBuilder, creates a too and adds the mask to it. + * \return the created XML node + */ +Inkscape::XML::Node *SvgBuilder::_createMask(double width, double height) { + Inkscape::XML::Node *mask_node = _xml_doc->createElement("svg:mask"); + mask_node->setAttribute("maskUnits", "userSpaceOnUse"); + mask_node->setAttributeSvgDouble("x", 0.0); + mask_node->setAttributeSvgDouble("y", 0.0); + mask_node->setAttributeSvgDouble("width", width); + mask_node->setAttributeSvgDouble("height", height); + // Append mask to defs + if (_is_top_level) { + _doc->getDefs()->getRepr()->appendChild(mask_node); + Inkscape::GC::release(mask_node); + return _doc->getDefs()->getRepr()->lastChild(); + } else { // Work around for renderer bug when mask isn't defined in pattern + static int mask_count = 0; + Inkscape::XML::Node *defs = _root->firstChild(); + if ( !( defs && !strcmp(defs->name(), "svg:defs") ) ) { + // Create node + defs = _xml_doc->createElement("svg:defs"); + _root->addChild(defs, nullptr); + Inkscape::GC::release(defs); + defs = _root->firstChild(); + } + gchar *mask_id = g_strdup_printf("_mask%d", mask_count++); + mask_node->setAttribute("id", mask_id); + g_free(mask_id); + defs->appendChild(mask_node); + Inkscape::GC::release(mask_node); + return defs->lastChild(); + } +} + +void SvgBuilder::addImage(GfxState *state, Stream *str, int width, int height, GfxImageColorMap *color_map, + bool interpolate, int *mask_colors) +{ + + Inkscape::XML::Node *image_node = _createImage(str, width, height, color_map, interpolate, mask_colors); + if (image_node) { + _setBlendMode(image_node, state); + _container->appendChild(image_node); + Inkscape::GC::release(image_node); + } +} + +void SvgBuilder::addImageMask(GfxState *state, Stream *str, int width, int height, + bool invert, bool interpolate) { + + // Create a rectangle + Inkscape::XML::Node *rect = _xml_doc->createElement("svg:rect"); + rect->setAttributeSvgDouble("x", 0.0); + rect->setAttributeSvgDouble("y", 0.0); + rect->setAttributeSvgDouble("width", 1.0); + rect->setAttributeSvgDouble("height", 1.0); + svgSetTransform(rect, Geom::Affine(1.0, 0.0, 0.0, -1.0, 0.0, 1.0)); + // Get current fill style and set it on the rectangle + SPCSSAttr *css = sp_repr_css_attr_new(); + _setFillStyle(css, state, false); + sp_repr_css_change(rect, css, "style"); + sp_repr_css_attr_unref(css); + _setBlendMode(rect, state); + + // Scaling 1x1 surfaces might not work so skip setting a mask with this size + if ( width > 1 || height > 1 ) { + Inkscape::XML::Node *mask_image_node = + _createImage(str, width, height, nullptr, interpolate, nullptr, true, invert); + if (mask_image_node) { + // Create the mask + Inkscape::XML::Node *mask_node = _createMask(1.0, 1.0); + // Remove unnecessary transformation from the mask image + mask_image_node->removeAttribute("transform"); + mask_node->appendChild(mask_image_node); + Inkscape::GC::release(mask_image_node); + gchar *mask_url = g_strdup_printf("url(#%s)", mask_node->attribute("id")); + rect->setAttribute("mask", mask_url); + g_free(mask_url); + } + } + + // Add the rectangle to the container + _container->appendChild(rect); + Inkscape::GC::release(rect); +} + +void SvgBuilder::addMaskedImage(GfxState *state, Stream *str, int width, int height, GfxImageColorMap *color_map, + bool interpolate, Stream *mask_str, int mask_width, int mask_height, bool invert_mask, + bool mask_interpolate) +{ + + Inkscape::XML::Node *mask_image_node = _createImage(mask_str, mask_width, mask_height, + nullptr, mask_interpolate, nullptr, true, invert_mask); + Inkscape::XML::Node *image_node = _createImage(str, width, height, color_map, interpolate, nullptr); + if ( mask_image_node && image_node ) { + // Create mask for the image + Inkscape::XML::Node *mask_node = _createMask(1.0, 1.0); + // Remove unnecessary transformation from the mask image + mask_image_node->removeAttribute("transform"); + mask_node->appendChild(mask_image_node); + // Scale the mask to the size of the image + Geom::Affine mask_transform((double)width, 0.0, 0.0, (double)height, 0.0, 0.0); + mask_node->setAttributeOrRemoveIfEmpty("maskTransform", sp_svg_transform_write(mask_transform)); + // Set mask and add image + gchar *mask_url = g_strdup_printf("url(#%s)", mask_node->attribute("id")); + image_node->setAttribute("mask", mask_url); + g_free(mask_url); + _container->appendChild(image_node); + } + if (mask_image_node) { + Inkscape::GC::release(mask_image_node); + } + if (image_node) { + _setBlendMode(image_node, state); + Inkscape::GC::release(image_node); + } +} + +void SvgBuilder::addSoftMaskedImage(GfxState *state, Stream *str, int width, int height, GfxImageColorMap *color_map, + bool interpolate, Stream *mask_str, int mask_width, int mask_height, + GfxImageColorMap *mask_color_map, bool mask_interpolate) +{ + + Inkscape::XML::Node *mask_image_node = _createImage(mask_str, mask_width, mask_height, + mask_color_map, mask_interpolate, nullptr, true); + Inkscape::XML::Node *image_node = _createImage(str, width, height, color_map, interpolate, nullptr); + if ( mask_image_node && image_node ) { + // Create mask for the image + Inkscape::XML::Node *mask_node = _createMask(1.0, 1.0); + // Remove unnecessary transformation from the mask image + mask_image_node->removeAttribute("transform"); + mask_node->appendChild(mask_image_node); + // Set mask and add image + gchar *mask_url = g_strdup_printf("url(#%s)", mask_node->attribute("id")); + image_node->setAttribute("mask", mask_url); + g_free(mask_url); + _container->appendChild(image_node); + } + if (mask_image_node) { + Inkscape::GC::release(mask_image_node); + } + if (image_node) { + _setBlendMode(image_node, state); + Inkscape::GC::release(image_node); + } +} + +/** + * \brief Starts building a new transparency group + */ +void SvgBuilder::pushTransparencyGroup(GfxState * /*state*/, double *bbox, + GfxColorSpace * /*blending_color_space*/, + bool isolated, bool knockout, + bool for_softmask) { + + // Push node stack + pushNode("svg:g"); + + // Setup new transparency group + SvgTransparencyGroup *transpGroup = new SvgTransparencyGroup; + for (size_t i = 0; i < 4; i++) { + transpGroup->bbox[i] = bbox[i]; + } + transpGroup->isolated = isolated; + transpGroup->knockout = knockout; + transpGroup->for_softmask = for_softmask; + transpGroup->container = _container; + + // Push onto the stack + transpGroup->next = _transp_group_stack; + _transp_group_stack = transpGroup; +} + +void SvgBuilder::popTransparencyGroup(GfxState * /*state*/) { + // Restore node stack + popNode(); +} + +/** + * \brief Places the current transparency group into the current container + */ +void SvgBuilder::paintTransparencyGroup(GfxState * /*state*/, double * /*bbox*/) { + SvgTransparencyGroup *transpGroup = _transp_group_stack; + _container->appendChild(transpGroup->container); + Inkscape::GC::release(transpGroup->container); + // Pop the stack + _transp_group_stack = transpGroup->next; + delete transpGroup; +} + +/** + * \brief Creates a mask using the current transparency group as its content + */ +void SvgBuilder::setSoftMask(GfxState * /*state*/, double * /*bbox*/, bool /*alpha*/, + Function * /*transfer_func*/, GfxColor * /*backdrop_color*/) { + + // Create mask + Inkscape::XML::Node *mask_node = _createMask(1.0, 1.0); + // Add the softmask content to it + SvgTransparencyGroup *transpGroup = _transp_group_stack; + mask_node->appendChild(transpGroup->container); + Inkscape::GC::release(transpGroup->container); + // Apply the mask + _state_stack.back().softmask = mask_node; + pushGroup(); + gchar *mask_url = g_strdup_printf("url(#%s)", mask_node->attribute("id")); + _container->setAttribute("mask", mask_url); + g_free(mask_url); + // Pop the stack + _transp_group_stack = transpGroup->next; + delete transpGroup; +} + +void SvgBuilder::clearSoftMask(GfxState * /*state*/) { + if (_state_stack.back().softmask) { + _state_stack.back().softmask = nullptr; + popGroup(); + } +} + +} } } /* namespace Inkscape, Extension, Internal */ + +#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 : diff --git a/src/extension/internal/pdfinput/svg-builder.h b/src/extension/internal/pdfinput/svg-builder.h new file mode 100644 index 0000000..e91febd --- /dev/null +++ b/src/extension/internal/pdfinput/svg-builder.h @@ -0,0 +1,257 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#ifndef SEEN_EXTENSION_INTERNAL_PDFINPUT_SVGBUILDER_H +#define SEEN_EXTENSION_INTERNAL_PDFINPUT_SVGBUILDER_H + +/* + * Authors: + * miklos erdelyi + * + * 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 + +#ifdef HAVE_POPPLER +#include "poppler-transition-api.h" + +class SPDocument; +namespace Inkscape { + namespace XML { + struct Document; + class Node; + } +} + +#include <2geom/point.h> +#include <2geom/affine.h> +#include + +#include "CharTypes.h" +class Function; +class GfxState; +struct GfxColor; +class GfxColorSpace; +struct GfxRGB; +class GfxPath; +class GfxPattern; +class GfxTilingPattern; +class GfxShading; +class GfxFont; +class GfxImageColorMap; +class Stream; +class XRef; + +class SPCSSAttr; + +#include +#include + +namespace Inkscape { +namespace Extension { +namespace Internal { + +struct SvgTransparencyGroup; + +/** + * Holds information about the current softmask and group depth for use of libpoppler. + * Could be later used to store other graphics state parameters so that we could + * emit only the differences in style settings from the parent state. + */ +struct SvgGraphicsState { + Inkscape::XML::Node *softmask; // Points to current softmask node + int group_depth; // Depth of nesting groups at this level +}; + +/** + * Holds information about glyphs added by PdfParser which haven't been added + * to the document yet. + */ +struct SvgGlyph { + Geom::Point position; // Absolute glyph coords + Geom::Point text_position; // Absolute glyph coords in text space + double dx; // X advance value + double dy; // Y advance value + double rise; // Text rise parameter + Glib::ustring code; // UTF-8 coded character + bool is_space; + + bool style_changed; // Set to true if style has to be reset + SPCSSAttr *style; + int render_mode; // Text render mode + const char *font_specification; // Pointer to current font specification +}; + +/** + * Builds the inner SVG representation using libpoppler from the calls of PdfParser. + */ +class SvgBuilder { +public: + SvgBuilder(SPDocument *document, gchar *docname, XRef *xref); + SvgBuilder(SvgBuilder *parent, Inkscape::XML::Node *root); + virtual ~SvgBuilder(); + + // Property setting + void setDocumentSize(double width, double height); // Document size in px + void setAsLayer(char *layer_name=nullptr); + void setGroupOpacity(double opacity); + Inkscape::XML::Node *getPreferences() { + return _preferences; + } + void pushPage(); + + // Handling the node stack + Inkscape::XML::Node *pushGroup(); + Inkscape::XML::Node *popGroup(); + Inkscape::XML::Node *getContainer(); // Returns current group node + + // Path adding + void addPath(GfxState *state, bool fill, bool stroke, bool even_odd=false); + void addShadedFill(GfxShading *shading, double *matrix, GfxPath *path, bool even_odd=false); + + // Image handling + void addImage(GfxState *state, Stream *str, int width, int height, + GfxImageColorMap *color_map, bool interpolate, int *mask_colors); + void addImageMask(GfxState *state, Stream *str, int width, int height, + bool invert, bool interpolate); + void addMaskedImage(GfxState *state, Stream *str, int width, int height, + GfxImageColorMap *color_map, bool interpolate, + Stream *mask_str, int mask_width, int mask_height, + bool invert_mask, bool mask_interpolate); + void addSoftMaskedImage(GfxState *state, Stream *str, int width, int height, + GfxImageColorMap *color_map, bool interpolate, + Stream *mask_str, int mask_width, int mask_height, + GfxImageColorMap *mask_color_map, bool mask_interpolate); + + // Transparency group and soft mask handling + void pushTransparencyGroup(GfxState *state, double *bbox, + GfxColorSpace *blending_color_space, + bool isolated, bool knockout, + bool for_softmask); + void popTransparencyGroup(GfxState *state); + void paintTransparencyGroup(GfxState *state, double *bbox); + void setSoftMask(GfxState *state, double *bbox, bool alpha, + Function *transfer_func, GfxColor *backdrop_color); + void clearSoftMask(GfxState *state); + + // Text handling + void beginString(GfxState *state); + void endString(GfxState *state); + void addChar(GfxState *state, double x, double y, + double dx, double dy, + double originX, double originY, + CharCode code, int nBytes, Unicode const *u, int uLen); + void beginTextObject(GfxState *state); + void endTextObject(GfxState *state); + + bool isPatternTypeSupported(GfxPattern *pattern); + + // State manipulation + void saveState(); + void restoreState(); + void updateStyle(GfxState *state); + void updateFont(GfxState *state); + void updateTextPosition(double tx, double ty); + void updateTextShift(GfxState *state, double shift); + void updateTextMatrix(GfxState *state); + + // Clipping + void clip(GfxState *state, bool even_odd=false); + void setClipPath(GfxState *state, bool even_odd=false); + + // Transforming + void setTransform(double c0, double c1, double c2, double c3, double c4, + double c5); + void setTransform(double const *transform); + bool getTransform(double *transform); + +private: + void _init(); + + // Pattern creation + gchar *_createPattern(GfxPattern *pattern, GfxState *state, bool is_stroke=false); + gchar *_createGradient(GfxShading *shading, double *matrix, bool for_shading=false); + void _addStopToGradient(Inkscape::XML::Node *gradient, double offset, + GfxRGB *color, double opacity); + bool _addGradientStops(Inkscape::XML::Node *gradient, GfxShading *shading, + _POPPLER_CONST Function *func); + gchar *_createTilingPattern(GfxTilingPattern *tiling_pattern, GfxState *state, + bool is_stroke=false); + // Image/mask creation + Inkscape::XML::Node *_createImage(Stream *str, int width, int height, + GfxImageColorMap *color_map, bool interpolate, + int *mask_colors, bool alpha_only=false, + bool invert_alpha=false); + Inkscape::XML::Node *_createMask(double width, double height); + // Style setting + SPCSSAttr *_setStyle(GfxState *state, bool fill, bool stroke, bool even_odd=false); + void _setStrokeStyle(SPCSSAttr *css, GfxState *state); + void _setFillStyle(SPCSSAttr *css, GfxState *state, bool even_odd); + void _setBlendMode(Inkscape::XML::Node *node, GfxState *state); + void _flushText(); // Write buffered text into doc + + std::string _BestMatchingFont(std::string PDFname); + + // Handling of node stack + Inkscape::XML::Node *pushNode(const char* name); + Inkscape::XML::Node *popNode(); + std::vector _node_stack; + std::vector _group_depth; // Depth of nesting groups + SvgTransparencyGroup *_transp_group_stack; // Transparency group stack + std::vector _state_stack; + + SPCSSAttr *_font_style; // Current font style + const char *_font_specification; + double _font_scaling; + bool _need_font_update; + Geom::Affine _text_matrix; + Geom::Point _text_position; + std::vector _glyphs; // Added characters + bool _in_text_object; // Whether we are inside a text object + bool _invalidated_style; + GfxState *_current_state; + std::vector _availableFontNames; // Full names, used for matching font names (Bug LP #179589). + + bool _is_top_level; // Whether this SvgBuilder is the top-level one + SPDocument *_doc; + gchar *_docname; // Basename of the URI from which this document is created + XRef *_xref; // Cross-reference table from the PDF doc we're converting from + Inkscape::XML::Document *_xml_doc; + Inkscape::XML::Node *_root; // Root node from the point of view of this SvgBuilder + Inkscape::XML::Node *_container; // Current container (group/pattern/mask) + Inkscape::XML::Node *_preferences; // Preferences container node + double _width; // Document size in px + double _height; // Document size in px + double _ttm[6]; ///< temporary transform matrix + bool _ttm_is_set; + + Inkscape::XML::Node *_nv = nullptr; // XML NameView xml + Inkscape::XML::Node *_page = nullptr; // XML Page definition + int _page_num = 0; // Are we on a page + double _page_left = 0 ; // Move to the left for more pages + double _page_top = 0 ; // Move to the top (maybe) + bool _page_offset = false; +}; + + +} // namespace Internal +} // namespace Extension +} // namespace Inkscape + +#endif // HAVE_POPPLER + +#endif // SEEN_EXTENSION_INTERNAL_PDFINPUT_SVGBUILDER_H + +/* + 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 : -- cgit v1.2.3