C++ Rect::width方法代码示例

void FilterFlood::render_cairo(FilterSlot &slot)
{
    cairo_surface_t *input = slot.getcairo(_input);

    double r = SP_RGBA32_R_F(color);
    double g = SP_RGBA32_G_F(color);
    double b = SP_RGBA32_B_F(color);
    double a = opacity;

#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)

    if (icc) {
        guchar ru, gu, bu;
        icc_color_to_sRGB(icc, &ru, &gu, &bu);
        r = SP_COLOR_U_TO_F(ru);
        g = SP_COLOR_U_TO_F(gu);
        b = SP_COLOR_U_TO_F(bu);
    }
#endif

    cairo_surface_t *out = ink_cairo_surface_create_same_size(input, CAIRO_CONTENT_COLOR_ALPHA);

    // Get filter primitive area in user units
    Geom::Rect fp = filter_primitive_area( slot.get_units() );

    // Convert to Cairo units
    Geom::Rect fp_cairo = fp * slot.get_units().get_matrix_user2pb();

    // Get area in slot (tile to fill)
    Geom::Rect sa = slot.get_slot_area();

    // Get overlap
    Geom::OptRect optoverlap = intersect( fp_cairo, sa );
    if( optoverlap ) {

        Geom::Rect overlap = *optoverlap;

        double dx = fp_cairo.min()[Geom::X] - sa.min()[Geom::X];
        double dy = fp_cairo.min()[Geom::Y] - sa.min()[Geom::Y];
        if( dx < 0.0 ) dx = 0.0;
        if( dy < 0.0 ) dy = 0.0;

        cairo_t *ct = cairo_create(out);
        cairo_set_source_rgba(ct, r, g, b, a);
        cairo_set_operator(ct, CAIRO_OPERATOR_SOURCE);
        cairo_rectangle(ct, dx, dy, overlap.width(), overlap.height() );
        cairo_fill(ct);
        cairo_destroy(ct);
    }

    slot.set(_output, out);
    cairo_surface_destroy(out);
}

Persp3D *persp3d_create_xml_element(SPDocument *document, Persp3DImpl *dup) {// if dup is given, copy the attributes over
    SPDefs *defs = document->getDefs();
    Inkscape::XML::Document *xml_doc = document->getReprDoc();
    Inkscape::XML::Node *repr;

    /* if no perspective is given, create a default one */
    repr = xml_doc->createElement("inkscape:perspective");
    repr->setAttribute("sodipodi:type", "inkscape:persp3d");

    // Use 'user-units'
    double width = document->getWidth().value("px");
    double height = document->getHeight().value("px");
    if( document->getRoot()->viewBox_set ) {
        Geom::Rect vb = document->getRoot()->viewBox;
        width = vb.width();
        height = vb.height();
    }

    Proj::Pt2 proj_vp_x = Proj::Pt2 (0.0,   height/2.0, 1.0);
    Proj::Pt2 proj_vp_y = Proj::Pt2 (0.0,   1000.0,     0.0);
    Proj::Pt2 proj_vp_z = Proj::Pt2 (width, height/2.0, 1.0);
    Proj::Pt2 proj_origin = Proj::Pt2 (width/2.0, height/3.0, 1.0 );

    if (dup) {
        proj_vp_x = dup->tmat.column (Proj::X);
        proj_vp_y = dup->tmat.column (Proj::Y);
        proj_vp_z = dup->tmat.column (Proj::Z);
        proj_origin = dup->tmat.column (Proj::W);
    }

    gchar *str = NULL;
    str = proj_vp_x.coord_string();
    repr->setAttribute("inkscape:vp_x", str);
    g_free (str);
    str = proj_vp_y.coord_string();
    repr->setAttribute("inkscape:vp_y", str);
    g_free (str);
    str = proj_vp_z.coord_string();
    repr->setAttribute("inkscape:vp_z", str);
    g_free (str);
    str = proj_origin.coord_string();
    repr->setAttribute("inkscape:persp3d-origin", str);
    g_free (str);

    /* Append the new persp3d to defs */
    defs->getRepr()->addChild(repr, NULL);
    Inkscape::GC::release(repr);

    return reinterpret_cast<Persp3D *>( defs->get_child_by_repr(repr) );
}

SPItem *Selection::_sizeistItem(bool sml, Selection::CompareSize compare) {
    std::vector<SPItem*> const items = const_cast<Selection *>(this)->itemList();
    gdouble max = sml ? 1e18 : 0;
    SPItem *ist = NULL;

    for ( std::vector<SPItem*>::const_iterator i=items.begin();i!=items.end(); ++i) {
        Geom::OptRect obox = SP_ITEM(*i)->desktopPreferredBounds();
        if (!obox || obox.isEmpty()) continue;
        Geom::Rect bbox = *obox;

        gdouble size = compare == 2 ? bbox.area() :
            (compare == 1 ? bbox.width() : bbox.height());
        size = sml ? size : size * -1;
        if (size < max) {
            max = size;
            ist = SP_ITEM(*i);
        }
    }
    return ist;
}

/**
 * Given a Geom::Rect that may, for example, correspond to the bbox of an object,
 * this function fits the canvas to that rect by resizing the canvas
 * and translating the document root into position.
 */
void SPDocument::fitToRect(Geom::Rect const &rect)
{
    double const w = rect.width();
    double const h = rect.height();

    double const old_height = sp_document_height(this);
    SPUnit const &px(sp_unit_get_by_id(SP_UNIT_PX));
    sp_document_set_width(this, w, &px);
    sp_document_set_height(this, h, &px);

    Geom::Translate const tr(Geom::Point(0, (old_height - h))
                             - to_2geom(rect.min()));
    SP_GROUP(root)->translateChildItems(tr);
    SPNamedView *nv = sp_document_namedview(this, 0);
    if(nv) {
        Geom::Translate tr2(-rect.min());
        nv->translateGuides(tr2);

        // update the viewport so the drawing appears to stay where it was
        nv->scrollAllDesktops(-tr2[0], tr2[1], false);
    }
}

// Apply scaling from viewbox
void SPViewBox::apply_viewbox(const Geom::Rect& in) {

    /* Determine actual viewbox in viewport coordinates */
    double x = 0.0;
    double y = 0.0;
    double width = in.width();
    double height = in.height();
    // std::cout << "  width: " << width << " height: " << height << std::endl;

    if (this->aspect_align != SP_ASPECT_NONE) {
      /* Things are getting interesting */
      double scalex = in.width() / this->viewBox.width();
      double scaley = in.height() / this->viewBox.height();
      double scale = (this->aspect_clip == SP_ASPECT_MEET) ? MIN (scalex, scaley) : MAX (scalex, scaley);
      width  = this->viewBox.width()  * scale;
      height = this->viewBox.height() * scale;

      /* Now place viewbox to requested position */
      switch (this->aspect_align) {
        case SP_ASPECT_XMIN_YMIN:
          break;
        case SP_ASPECT_XMID_YMIN:
          x = 0.5 * (in.width() - width);
          break;
        case SP_ASPECT_XMAX_YMIN:
          x = 1.0 * (in.width() - width);
          break;
        case SP_ASPECT_XMIN_YMID:
          y = 0.5 * (in.height() - height);
          break;
        case SP_ASPECT_XMID_YMID:
          x = 0.5 * (in.width() - width);
          y = 0.5 * (in.height() - height);
          break;
        case SP_ASPECT_XMAX_YMID:
          x = 1.0 * (in.width() - width);
          y = 0.5 * (in.height() - height);
          break;
        case SP_ASPECT_XMIN_YMAX:
          y = 1.0 * (in.height() - height);
          break;
        case SP_ASPECT_XMID_YMAX:
          x = 0.5 * (in.width() - width);
          y = 1.0 * (in.height() - height);
          break;
        case SP_ASPECT_XMAX_YMAX:
          x = 1.0 * (in.width() - width);
          y = 1.0 * (in.height() - height);
          break;
        default:
          break;
      }
    }

    /* Viewbox transform from scale and position */
    Geom::Affine q;
    q[0] = width / this->viewBox.width();
    q[1] = 0.0;
    q[2] = 0.0;
    q[3] = height / this->viewBox.height();
    q[4] = x - q[0] * this->viewBox.left();
    q[5] = y - q[3] * this->viewBox.top();

    // std::cout << "  q\n" << q << std::endl;

    /* Append viewbox transformation */
    this->c2p = q * this->c2p;
}

void FilterTile::render_cairo(FilterSlot &slot)
{
    // FIX ME!
    static bool tile_warning = false;
    if (!tile_warning) {
        g_warning("Renderer for feTile has non-optimal implementation, expect slowness and bugs.");
        tile_warning = true;
    }

    // Fixing isn't so easy as the Inkscape renderer breaks the canvas into "rendering" tiles for
    // faster rendering. (The "rendering" tiles are not the same as the tiles in this primitive.)
    // Only if the the feTile tile source falls inside the current "rendering" tile will the tile
    // image be available.

    // This input source contains only the "rendering" tile.
    cairo_surface_t *in = slot.getcairo(_input);

    // For debugging
    // static int i = 0;
    // ++i;
    // std::stringstream filename;
    // filename << "dump." << i << ".png";
    // cairo_surface_write_to_png( in, filename.str().c_str() );

    // This is the feTile source area as determined by the input primitive area (see SVG spec).
    Geom::Rect tile_area = slot.get_primitive_area(_input);

    if( tile_area.width() == 0.0 || tile_area.height() == 0.0 ) {

        slot.set(_output, in);
        std::cerr << "FileTile::render_cairo: tile has zero width or height" << std::endl;

    } else {

        cairo_surface_t *out = ink_cairo_surface_create_identical(in);
        // color_interpolation_filters for out same as in.
        copy_cairo_surface_ci(in, out);
        cairo_t *ct = cairo_create(out);

        // The rectangle of the "rendering" tile.
        Geom::Rect sa = slot.get_slot_area();

        Geom::Affine trans = slot.get_units().get_matrix_user2pb();

        // Create feTile tile ----------------

        // Get tile area in pixbuf units (tile transformed).
        Geom::Rect tt = tile_area * trans;

        // Shift between "rendering" tile and feTile tile
        Geom::Point shift = sa.min() - tt.min();

        // Create feTile tile surface
        cairo_surface_t *tile = cairo_surface_create_similar(in, cairo_surface_get_content(in),
                                tt.width(), tt.height());
        cairo_t *ct_tile = cairo_create(tile);
        cairo_set_source_surface(ct_tile, in, shift[Geom::X], shift[Geom::Y]);
        cairo_paint(ct_tile);

        // Paint tiles ------------------

        // For debugging
        // std::stringstream filename;
        // filename << "tile." << i << ".png";
        // cairo_surface_write_to_png( tile, filename.str().c_str() );

        // Determine number of feTile rows and columns
        Geom::Rect pr = filter_primitive_area( slot.get_units() );
        int tile_cols = ceil( pr.width()  / tile_area.width() );
        int tile_rows = ceil( pr.height() / tile_area.height() );

        // Do tiling (TO DO: restrict to slot area.)
        for( int col=0; col < tile_cols; ++col ) {
            for( int row=0; row < tile_rows; ++row ) {

                Geom::Point offset( col*tile_area.width(), row*tile_area.height() );
                offset *= trans;
                offset[Geom::X] -= trans[4];
                offset[Geom::Y] -= trans[5];

                cairo_set_source_surface(ct, tile, offset[Geom::X], offset[Geom::Y]);
                cairo_paint(ct);
            }
        }
        slot.set(_output, out);

        // Clean up
        cairo_destroy(ct);
        cairo_surface_destroy(out);
        cairo_destroy(ct_tile);
        cairo_surface_destroy(tile);
    }
}

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;
}

/**
 * Creates a surface with the given logical and physical extents.
 * When a drawing context is created for this surface, its pixels
 * will cover the area under the given rectangle. IT will contain
 * the number of pixels specified by the second argument.
 * @param logbox Logical extents of the surface
 * @param pixdims Pixel dimensions of the surface.
 */
DrawingSurface::DrawingSurface(Geom::Rect const &logbox, Geom::IntPoint const &pixdims)
    : _surface(NULL)
    , _origin(logbox.min())
    , _scale(pixdims[X] / logbox.width(), pixdims[Y] / logbox.height())
    , _pixels(pixdims)
{}

void FilterImage::render_cairo(FilterSlot &slot)
{
    if (!feImageHref)
        return;

    //cairo_surface_t *input = slot.getcairo(_input);

    // Viewport is filter primitive area (in user coordinates).
    // Note: viewport calculation in non-trivial. Do not rely
    // on get_matrix_primitiveunits2pb().
    Geom::Rect vp = filter_primitive_area( slot.get_units() );
    slot.set_primitive_area(_output, vp); // Needed for tiling

    double feImageX      = vp.min()[Geom::X];
    double feImageY      = vp.min()[Geom::Y];
    double feImageWidth  = vp.width();
    double feImageHeight = vp.height();

    // feImage is suppose to use the same parameters as a normal SVG image.
    // If a width or height is set to zero, the image is not suppose to be displayed.
    // This does not seem to be what Firefox or Opera does, nor does the W3C displacement
    // filter test expect this behavior. If the width and/or height are zero, we use
    // the width and height of the object bounding box.
    Geom::Affine m = slot.get_units().get_matrix_user2filterunits().inverse();
    Geom::Point bbox_00 = Geom::Point(0,0) * m;
    Geom::Point bbox_w0 = Geom::Point(1,0) * m;
    Geom::Point bbox_0h = Geom::Point(0,1) * m;
    double bbox_width = Geom::distance(bbox_00, bbox_w0);
    double bbox_height = Geom::distance(bbox_00, bbox_0h);

    if( feImageWidth  == 0 ) feImageWidth  = bbox_width;
    if( feImageHeight == 0 ) feImageHeight = bbox_height;

    // Internal image, like <use>
    if (from_element) {
        if (!SVGElem) return;

        // TODO: do not recreate the rendering tree every time
        // TODO: the entire thing is a hack, we should give filter primitives an "update" method
        //       like the one for DrawingItems
        document->ensureUpToDate();

        Drawing drawing;
        Geom::OptRect optarea = SVGElem->visualBounds();
        if (!optarea) return;

        unsigned const key = SPItem::display_key_new(1);
        DrawingItem *ai = SVGElem->invoke_show(drawing, key, SP_ITEM_SHOW_DISPLAY);
        if (!ai) {
            g_warning("feImage renderer: error creating DrawingItem for SVG Element");
            return;
        }
        drawing.setRoot(ai);

        Geom::Rect area = *optarea;
        Geom::Affine user2pb = slot.get_units().get_matrix_user2pb();

        /* FIXME: These variables are currently unused.  Why were they calculated?
        double scaleX = feImageWidth / area.width();
        double scaleY = feImageHeight / area.height();
        */

        Geom::Rect sa = slot.get_slot_area();
        cairo_surface_t *out = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
            sa.width(), sa.height());
        Inkscape::DrawingContext dc(out, sa.min());
        dc.transform(user2pb); // we are now in primitive units
        dc.translate(feImageX, feImageY);
//        dc.scale(scaleX, scaleY);  No scaling should be done

        Geom::IntRect render_rect = area.roundOutwards();
//        dc.translate(render_rect.min());  This seems incorrect

        // Update to renderable state
        drawing.update(render_rect);
        drawing.render(dc, render_rect);
        SVGElem->invoke_hide(key);

        // For the moment, we'll assume that any image is in sRGB color space
        set_cairo_surface_ci(out, SP_CSS_COLOR_INTERPOLATION_SRGB);

        slot.set(_output, out);
        cairo_surface_destroy(out);
        return;
    }

    // External image, like <image>
    if (!image && !broken_ref) {
        broken_ref = true;

        /* TODO: If feImageHref is absolute, then use that (preferably handling the
         * case that it's not a file URI).  Otherwise, go up the tree looking
         * for an xml:base attribute, and use that as the base URI for resolving
         * the relative feImageHref URI.  Otherwise, if document->base is valid,
         * then use that as the base URI.  Otherwise, use feImageHref directly
         * (i.e. interpreting it as relative to our current working directory).
         * (See http://www.w3.org/TR/xmlbase/#resolution .) */
        gchar *fullname = feImageHref;
        if ( !g_file_test( fullname, G_FILE_TEST_EXISTS ) ) {
            // Try to load from relative postion combined with document base
//.........这里部分代码省略.........

// Apply scaling from viewbox
void SPViewBox::apply_viewbox(const Geom::Rect& in, double scale_none) {

    /* Determine actual viewbox in viewport coordinates */
    // scale_none is the scale that would apply if the viewbox and page size are same size
    // it is passed here because it is a double-precision variable, while 'in' is originally float
    double x = 0.0;
    double y = 0.0;
    double scale_x = in.width() / this->viewBox.width();
    double scale_y = in.height() / this->viewBox.height();
    double scale_uniform = 1.0; // used only if scaling is uniform

    if (Geom::are_near(scale_x / scale_y, 1.0, Geom::EPSILON)) {
      // scaling is already uniform, reduce numerical error
      scale_uniform = (scale_x + scale_y)/2.0;
      if (Geom::are_near(scale_uniform / scale_none, 1.0, Geom::EPSILON))
          scale_uniform = scale_none; // objects are same size, reduce numerical error
      scale_x = scale_uniform;
      scale_y = scale_uniform;
    } else if (this->aspect_align != SP_ASPECT_NONE) {
      // scaling is not uniform, but force it to be
      scale_uniform = (this->aspect_clip == SP_ASPECT_MEET) ? MIN (scale_x, scale_y) : MAX (scale_x, scale_y);
      scale_x = scale_uniform;
      scale_y = scale_uniform;
      double width  = this->viewBox.width()  * scale_uniform;
      double height = this->viewBox.height() * scale_uniform;

      /* Now place viewbox to requested position */
      switch (this->aspect_align) {
        case SP_ASPECT_XMIN_YMIN:
          break;
        case SP_ASPECT_XMID_YMIN:
          x = 0.5 * (in.width() - width);
          break;
        case SP_ASPECT_XMAX_YMIN:
          x = 1.0 * (in.width() - width);
          break;
        case SP_ASPECT_XMIN_YMID:
          y = 0.5 * (in.height() - height);
          break;
        case SP_ASPECT_XMID_YMID:
          x = 0.5 * (in.width() - width);
          y = 0.5 * (in.height() - height);
          break;
        case SP_ASPECT_XMAX_YMID:
          x = 1.0 * (in.width() - width);
          y = 0.5 * (in.height() - height);
          break;
        case SP_ASPECT_XMIN_YMAX:
          y = 1.0 * (in.height() - height);
          break;
        case SP_ASPECT_XMID_YMAX:
          x = 0.5 * (in.width() - width);
          y = 1.0 * (in.height() - height);
          break;
        case SP_ASPECT_XMAX_YMAX:
          x = 1.0 * (in.width() - width);
          y = 1.0 * (in.height() - height);
          break;
        default:
          break;
      }
    }

    /* Viewbox transform from scale and position */
    Geom::Affine q;
    q[0] = scale_x;
    q[1] = 0.0;
    q[2] = 0.0;
    q[3] = scale_y;
    q[4] = x - scale_x * this->viewBox.left();
    q[5] = y - scale_y * this->viewBox.top();

    // std::cout << "  q\n" << q << std::endl;

    /* Append viewbox transformation */
    this->c2p = q * this->c2p;
}