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-rw-r--r--src/extension/internal/cairo-ps-out.cpp361
1 files changed, 361 insertions, 0 deletions
diff --git a/src/extension/internal/cairo-ps-out.cpp b/src/extension/internal/cairo-ps-out.cpp
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+++ b/src/extension/internal/cairo-ps-out.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * A quick hack to use the Cairo renderer to write out a file. This
+ * then makes 'save as...' PS.
+ *
+ * Authors:
+ * Ted Gould <ted@gould.cx>
+ * Ulf Erikson <ulferikson@users.sf.net>
+ * Adib Taraben <theAdib@gmail.com>
+ * Jon A. Cruz <jon@joncruz.org>
+ * Abhishek Sharma
+ *
+ * Copyright (C) 2004-2006 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <cairo.h>
+#ifdef CAIRO_HAS_PS_SURFACE
+
+#include "cairo-ps.h"
+#include "cairo-ps-out.h"
+#include "cairo-render-context.h"
+#include "cairo-renderer.h"
+#include "latex-text-renderer.h"
+#include "path-chemistry.h"
+#include <print.h>
+#include "extension/system.h"
+#include "extension/print.h"
+#include "extension/db.h"
+#include "extension/output.h"
+#include "display/drawing.h"
+
+#include "display/curve.h"
+
+#include "object/sp-item.h"
+#include "object/sp-root.h"
+
+#include "io/sys.h"
+#include "document.h"
+
+namespace Inkscape {
+namespace Extension {
+namespace Internal {
+
+bool CairoPsOutput::check (Inkscape::Extension::Extension * /*module*/)
+{
+ if (nullptr == Inkscape::Extension::db.get(SP_MODULE_KEY_PRINT_CAIRO_PS)) {
+ return FALSE;
+ } else {
+ return TRUE;
+ }
+}
+
+bool CairoEpsOutput::check (Inkscape::Extension::Extension * /*module*/)
+{
+ if (nullptr == Inkscape::Extension::db.get(SP_MODULE_KEY_PRINT_CAIRO_EPS)) {
+ return FALSE;
+ } else {
+ return TRUE;
+ }
+}
+
+static bool
+ps_print_document_to_file(SPDocument *doc, gchar const *filename, unsigned int level, bool texttopath, bool omittext,
+ bool filtertobitmap, int resolution, bool eps = false)
+{
+ if (texttopath) {
+ assert(!omittext);
+ // Cairo's text-to-path method has numerical precision and font matching
+ // issues (https://gitlab.com/inkscape/inkscape/-/issues/1979).
+ // We get better results by using Inkscape's Object-to-Path method.
+ Inkscape::convert_text_to_curves(doc);
+ }
+
+ doc->ensureUpToDate();
+
+ SPRoot *root = doc->getRoot();
+ if (!root) {
+ return false;
+ }
+
+ Inkscape::Drawing drawing;
+ unsigned dkey = SPItem::display_key_new(1);
+ root->invoke_show(drawing, dkey, SP_ITEM_SHOW_DISPLAY);
+
+ /* Create renderer and context */
+ CairoRenderer *renderer = new CairoRenderer();
+ CairoRenderContext *ctx = renderer->createContext();
+ ctx->setPSLevel(level);
+ ctx->setEPS(eps);
+ ctx->setTextToPath(texttopath);
+ ctx->setOmitText(omittext);
+ ctx->setFilterToBitmap(filtertobitmap);
+ ctx->setBitmapResolution(resolution);
+
+ bool ret = ctx->setPsTarget(filename);
+ if(ret) {
+ /* Render document */
+ ret = renderer->setupDocument(ctx, doc, root);
+ if (ret) {
+ /* Render multiple pages */
+ ret = renderer->renderPages(ctx, doc, false);
+ ctx->finish();
+ }
+ }
+
+ root->invoke_hide(dkey);
+
+ renderer->destroyContext(ctx);
+ delete renderer;
+
+ return ret;
+}
+
+
+/**
+ \brief This function calls the output module with the filename
+ \param mod unused
+ \param doc Document to be saved
+ \param filename Filename to save to (probably will end in .ps)
+*/
+void
+CairoPsOutput::save(Inkscape::Extension::Output *mod, SPDocument *doc, gchar const *filename)
+{
+ Inkscape::Extension::Extension * ext;
+ unsigned int ret;
+
+ ext = Inkscape::Extension::db.get(SP_MODULE_KEY_PRINT_CAIRO_PS);
+ if (ext == nullptr)
+ return;
+
+ int level = CAIRO_PS_LEVEL_2;
+ try {
+ const gchar *new_level = mod->get_param_optiongroup("PSlevel");
+ if((new_level != nullptr) && (g_ascii_strcasecmp("PS3", new_level) == 0)) {
+ level = CAIRO_PS_LEVEL_3;
+ }
+ } catch(...) {}
+
+ bool new_textToPath = FALSE;
+ try {
+ new_textToPath = (strcmp(mod->get_param_optiongroup("textToPath"), "paths") == 0);
+ } catch(...) {}
+
+ bool new_textToLaTeX = FALSE;
+ try {
+ new_textToLaTeX = (strcmp(mod->get_param_optiongroup("textToPath"), "LaTeX") == 0);
+ }
+ catch(...) {
+ g_warning("Parameter <textToLaTeX> might not exist");
+ }
+
+ bool new_blurToBitmap = FALSE;
+ try {
+ new_blurToBitmap = mod->get_param_bool("blurToBitmap");
+ } catch(...) {}
+
+ int new_bitmapResolution = 72;
+ try {
+ new_bitmapResolution = mod->get_param_int("resolution");
+ } catch(...) {}
+
+ // Create PS
+ {
+ gchar * final_name;
+ final_name = g_strdup_printf("> %s", filename);
+ ret = ps_print_document_to_file(doc, final_name, level, new_textToPath,
+ new_textToLaTeX, new_blurToBitmap,
+ new_bitmapResolution);
+ g_free(final_name);
+
+ if (!ret)
+ throw Inkscape::Extension::Output::save_failed();
+ }
+
+ // Create LaTeX file (if requested)
+ if (new_textToLaTeX) {
+ ret = latex_render_document_text_to_file(doc, filename, false);
+
+ if (!ret)
+ throw Inkscape::Extension::Output::save_failed();
+ }
+}
+
+
+/**
+ \brief This function calls the output module with the filename
+ \param mod unused
+ \param doc Document to be saved
+ \param filename Filename to save to (probably will end in .ps)
+*/
+void
+CairoEpsOutput::save(Inkscape::Extension::Output *mod, SPDocument *doc, gchar const *filename)
+{
+ Inkscape::Extension::Extension * ext;
+ unsigned int ret;
+
+ ext = Inkscape::Extension::db.get(SP_MODULE_KEY_PRINT_CAIRO_EPS);
+ if (ext == nullptr)
+ return;
+
+ int level = CAIRO_PS_LEVEL_2;
+ try {
+ const gchar *new_level = mod->get_param_optiongroup("PSlevel");
+ if((new_level != nullptr) && (g_ascii_strcasecmp("PS3", new_level) == 0)) {
+ level = CAIRO_PS_LEVEL_3;
+ }
+ } catch(...) {}
+
+ bool new_textToPath = FALSE;
+ try {
+ new_textToPath = (strcmp(mod->get_param_optiongroup("textToPath"), "paths") == 0);
+ } catch(...) {}
+
+ bool new_textToLaTeX = FALSE;
+ try {
+ new_textToLaTeX = (strcmp(mod->get_param_optiongroup("textToPath"), "LaTeX") == 0);
+ }
+ catch(...) {
+ g_warning("Parameter <textToLaTeX> might not exist");
+ }
+
+ bool new_blurToBitmap = FALSE;
+ try {
+ new_blurToBitmap = mod->get_param_bool("blurToBitmap");
+ } catch(...) {}
+
+ int new_bitmapResolution = 72;
+ try {
+ new_bitmapResolution = mod->get_param_int("resolution");
+ } catch(...) {}
+
+ // Create EPS
+ {
+ gchar * final_name;
+ final_name = g_strdup_printf("> %s", filename);
+ ret = ps_print_document_to_file(doc, final_name, level, new_textToPath,
+ new_textToLaTeX, new_blurToBitmap,
+ new_bitmapResolution, true);
+ g_free(final_name);
+
+ if (!ret)
+ throw Inkscape::Extension::Output::save_failed();
+ }
+
+ // Create LaTeX file (if requested)
+ if (new_textToLaTeX) {
+ ret = latex_render_document_text_to_file(doc, filename, false);
+
+ if (!ret)
+ throw Inkscape::Extension::Output::save_failed();
+ }
+}
+
+
+bool
+CairoPsOutput::textToPath(Inkscape::Extension::Print * ext)
+{
+ return ext->get_param_bool("textToPath");
+}
+
+bool
+CairoEpsOutput::textToPath(Inkscape::Extension::Print * ext)
+{
+ return ext->get_param_bool("textToPath");
+}
+
+#include "clear-n_.h"
+
+/**
+ \brief A function allocate a copy of this function.
+
+ This is the definition of Cairo PS out. This function just
+ calls the extension system with the memory allocated XML that
+ describes the data.
+*/
+void
+CairoPsOutput::init ()
+{
+ // clang-format off
+ Inkscape::Extension::build_from_mem(
+ "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
+ "<name>" N_("PostScript") "</name>\n"
+ "<id>" SP_MODULE_KEY_PRINT_CAIRO_PS "</id>\n"
+ "<param name=\"PSlevel\" gui-text=\"" N_("Restrict to PS level:") "\" type=\"optiongroup\" appearance=\"combo\" >\n"
+ "<option value='PS3'>" N_("PostScript level 3") "</option>\n"
+ "<option value='PS2'>" N_("PostScript level 2") "</option>\n"
+ "</param>\n"
+ "<param name=\"textToPath\" gui-text=\"" N_("Text output options:") "\" type=\"optiongroup\" appearance=\"radio\">\n"
+ "<option value=\"embed\">" N_("Embed fonts") "</option>\n"
+ "<option value=\"paths\">" N_("Convert text to paths") "</option>\n"
+ "<option value=\"LaTeX\">" N_("Omit text in PDF and create LaTeX file") "</option>\n"
+ "</param>\n"
+ "<param name=\"blurToBitmap\" gui-text=\"" N_("Rasterize filter effects") "\" type=\"bool\">true</param>\n"
+ "<param name=\"resolution\" gui-text=\"" N_("Resolution for rasterization (dpi):") "\" type=\"int\" min=\"1\" max=\"10000\">96</param>\n"
+ "<spacer/>"
+ "<hbox indent=\"1\"><image>info-outline</image><spacer/><vbox><spacer/>"
+ "<label>" N_("When exporting from the Export dialog, you can choose objects to export. 'Save a copy' / 'Save as' will export all pages.") "</label>"
+ "<spacer size=\"5\" />"
+ "<label>" N_("The page bleed can be set with the Page tool.") "</label>"
+ "</vbox></hbox>"
+ "<output>\n"
+ "<extension>.ps</extension>\n"
+ "<mimetype>image/x-postscript</mimetype>\n"
+ "<filetypename>" N_("PostScript (*.ps)") "</filetypename>\n"
+ "<filetypetooltip>" N_("PostScript File") "</filetypetooltip>\n"
+ "</output>\n"
+ "</inkscape-extension>", new CairoPsOutput());
+ // clang-format on
+
+ return;
+}
+
+/**
+ \brief A function allocate a copy of this function.
+
+ This is the definition of Cairo EPS out. This function just
+ calls the extension system with the memory allocated XML that
+ describes the data.
+*/
+void
+CairoEpsOutput::init ()
+{
+ // clang-format off
+ Inkscape::Extension::build_from_mem(
+ "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
+ "<name>" N_("Encapsulated PostScript") "</name>\n"
+ "<id>" SP_MODULE_KEY_PRINT_CAIRO_EPS "</id>\n"
+ "<param name=\"PSlevel\" gui-text=\"" N_("Restrict to PS level:") "\" type=\"optiongroup\" appearance=\"combo\" >\n"
+ "<option value='PS3'>" N_("PostScript level 3") "</option>\n"
+ "<option value='PS2'>" N_("PostScript level 2") "</option>\n"
+ "</param>\n"
+ "<param name=\"textToPath\" gui-text=\"" N_("Text output options:") "\" type=\"optiongroup\" appearance=\"radio\">\n"
+ "<option value=\"embed\">" N_("Embed fonts") "</option>\n"
+ "<option value=\"paths\">" N_("Convert text to paths") "</option>\n"
+ "<option value=\"LaTeX\">" N_("Omit text in PDF and create LaTeX file") "</option>\n"
+ "</param>\n"
+ "<param name=\"blurToBitmap\" gui-text=\"" N_("Rasterize filter effects") "\" type=\"bool\">true</param>\n"
+ "<param name=\"resolution\" gui-text=\"" N_("Resolution for rasterization (dpi):") "\" type=\"int\" min=\"1\" max=\"10000\">96</param>\n"
+ "<spacer/>"
+ "<hbox indent=\"1\"><image>info-outline</image><spacer/><vbox><spacer/>"
+ "<label>" N_("When exporting from the Export dialog, you can choose objects to export. 'Save a copy' / 'Save as' will export all pages.") "</label>"
+ "<spacer size=\"5\" />"
+ "<label>" N_("The page bleed can be set with the Page tool.") "</label>"
+ "</vbox></hbox>"
+ "<output>\n"
+ "<extension>.eps</extension>\n"
+ "<mimetype>image/x-e-postscript</mimetype>\n"
+ "<filetypename>" N_("Encapsulated PostScript (*.eps)") "</filetypename>\n"
+ "<filetypetooltip>" N_("Encapsulated PostScript File") "</filetypetooltip>\n"
+ "</output>\n"
+ "</inkscape-extension>", new CairoEpsOutput());
+ // clang-format on
+
+ return;
+}
+
+} } } /* namespace Inkscape, Extension, Implementation */
+
+#endif /* HAVE_CAIRO_PDF */
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