/** * Hide all items that are not listed in list, recursively, skipping groups and defs. */ static void hide_other_items_recursively(SPObject *o, GSList *list, unsigned dkey) { if ( SP_IS_ITEM(o) && !SP_IS_DEFS(o) && !SP_IS_ROOT(o) && !SP_IS_GROUP(o) && !g_slist_find(list, o) ) { SP_ITEM(o)->invoke_hide(dkey); } // recurse if (!g_slist_find(list, o)) { for ( SPObject *child = o->firstChild() ; child; child = child->getNext() ) { hide_other_items_recursively(child, list, dkey); } } }
/** * Hide all items that are not listed in list, recursively, skipping groups and defs. */ static void hide_other_items_recursively(SPObject *o, const std::vector<SPItem*> &list, unsigned dkey) { if ( SP_IS_ITEM(o) && !SP_IS_DEFS(o) && !SP_IS_ROOT(o) && !SP_IS_GROUP(o) && list.end()==find(list.begin(),list.end(),o)) { SP_ITEM(o)->invoke_hide(dkey); } // recurse if (list.end()==find(list.begin(),list.end(),o)) { for ( SPObject *child = o->firstChild() ; child; child = child->getNext() ) { hide_other_items_recursively(child, list, dkey); } } }
ExportResult sp_export_png_file(SPDocument *doc, gchar const *filename, Geom::Rect const &area, unsigned long width, unsigned long height, double xdpi, double ydpi, unsigned long bgcolor, unsigned (*status)(float, void *), void *data, bool force_overwrite, GSList *items_only) { g_return_val_if_fail(doc != NULL, EXPORT_ERROR); g_return_val_if_fail(filename != NULL, EXPORT_ERROR); g_return_val_if_fail(width >= 1, EXPORT_ERROR); g_return_val_if_fail(height >= 1, EXPORT_ERROR); g_return_val_if_fail(!area.hasZeroArea(), EXPORT_ERROR); if (!force_overwrite && !sp_ui_overwrite_file(filename)) { // aborted overwrite return EXPORT_ABORTED; } doc->ensureUpToDate(); /* Calculate translation by transforming to document coordinates (flipping Y)*/ Geom::Point translation = Geom::Point(-area[Geom::X][0], area[Geom::Y][1] - doc->getHeight().value("px")); /* This calculation is only valid when assumed that (x0,y0)= area.corner(0) and (x1,y1) = area.corner(2) * 1) a[0] * x0 + a[2] * y1 + a[4] = 0.0 * 2) a[1] * x0 + a[3] * y1 + a[5] = 0.0 * 3) a[0] * x1 + a[2] * y1 + a[4] = width * 4) a[1] * x0 + a[3] * y0 + a[5] = height * 5) a[1] = 0.0; * 6) a[2] = 0.0; * * (1,3) a[0] * x1 - a[0] * x0 = width * a[0] = width / (x1 - x0) * (2,4) a[3] * y0 - a[3] * y1 = height * a[3] = height / (y0 - y1) * (1) a[4] = -a[0] * x0 * (2) a[5] = -a[3] * y1 */ Geom::Affine const affine(Geom::Translate(translation) * Geom::Scale(width / area.width(), height / area.height())); //SP_PRINT_MATRIX("SVG2PNG", &affine); struct SPEBP ebp; ebp.width = width; ebp.height = height; ebp.background = bgcolor; /* Create new drawing */ Inkscape::Drawing drawing; drawing.setExact(true); // export with maximum blur rendering quality unsigned const dkey = SPItem::display_key_new(1); // Create ArenaItems and set transform drawing.setRoot(doc->getRoot()->invoke_show(drawing, dkey, SP_ITEM_SHOW_DISPLAY)); drawing.root()->setTransform(affine); ebp.drawing = &drawing; // We show all and then hide all items we don't want, instead of showing only requested items, // because that would not work if the shown item references something in defs if (items_only) { hide_other_items_recursively(doc->getRoot(), items_only, dkey); } ebp.status = status; ebp.data = data; bool write_status = false;; ebp.sheight = 64; ebp.px = g_try_new(guchar, 4 * ebp.sheight * width); if (ebp.px) { write_status = sp_png_write_rgba_striped(doc, filename, width, height, xdpi, ydpi, sp_export_get_rows, &ebp); g_free(ebp.px); } // Hide items, this releases arenaitem doc->getRoot()->invoke_hide(dkey); return write_status ? EXPORT_OK : EXPORT_ERROR; }