Esempio n. 1
0
void sp_print_document_to_file(SPDocument *doc, gchar const *filename)
{
    doc->ensureUpToDate();

    Inkscape::Extension::Print *mod = Inkscape::Extension::get_print(SP_MODULE_KEY_PRINT_PS);
    SPPrintContext context;
    gchar const *oldconst = mod->get_param_string("destination");
    gchar *oldoutput = g_strdup(oldconst);

    mod->set_param_string("destination", (gchar *)filename);

/* Start */
    context.module = mod;
    /* fixme: This has to go into module constructor somehow */
    /* Create new drawing */
    mod->base = doc->getRoot();
    Inkscape::Drawing drawing;
    mod->dkey = SPItem::display_key_new(1);
    mod->root = (mod->base)->invoke_show(drawing, mod->dkey, SP_ITEM_SHOW_DISPLAY);
    drawing.setRoot(mod->root);
    /* Print document */
    mod->begin(doc);
    (mod->base)->invoke_print(&context);
    mod->finish();
    /* Release drawing items */
    (mod->base)->invoke_hide(mod->dkey);
    mod->base = NULL;
    mod->root = NULL; // should be deleted by invoke_hide
/* end */

    mod->set_param_string("destination", oldoutput);
    g_free(oldoutput);
}
Esempio n. 2
0
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;
}