Need to calculate viewboxWH (width/height) after loading svg image

[carloBarazzetta]

Hello, at 6 Jan 2025 I need to change my code of Image32SVGFactory from:
vbox := fSvgReader.RootElement.GetViewbox;
to
vbox := fSvgReader.RootElement.viewboxWH;
because GetViewbox was removed from source of Img32.SVG.Reader, but it is also mentioned in a comment line... ;-)

Now the problem is that, after loading an svg file RootElement.viewboxWH is not initialized, so I need to make a change to source code of Img32.SVG.Reader adding a new public method "CalcViewBoxOfRootElement" like this:

procedure TSvgReader.CalcViewBoxOfRootElement;
begin
  fRootElement.viewboxWH.Width := fRootElement.elRectWH.width.GetValue(defaultSvgWidth, 0);
  fRootElement.viewboxWH.height := fRootElement.elRectWH.height.GetValue(defaultSvgHeight, 0);
end;

Or something else that give me a chance to read the viewbox size, after loading file stream or source stream...
Thanks....
Carlo

[AngusJohnson]

Hi Carlo.

I don't understand the problem you're describing, so it'd help if you provided and example.

fRootElement.viewboxWH should be assigned via the Viewbox_Attrib procedure which is called whenever an SVG element's viewbox attribute is encountered.