The height of path line is incorrect when stroke-width is increasing

[callesp]

Bug Description

When increasing stroke-width, the height of path is rendering incorrectly as below:
(stroke-width: 5px)

(stroke-width: 50px)

Reproducible Code (if applicable)

export component Demo inherits Rectangle{
    width: 300px;
    height: 300px;
    
    Path {
        stroke: darkgreen;
        stroke-width: 50px;

        viewbox-height: 100;
        viewbox-width: 100;

        MoveTo {
            x: 0;
            y: 0;
        }

        LineTo {
            x: 0;
            y: 100;
        }

        Close {}
    }
}

Environment Details

• Slint Version: 1.11.0
• Platform/OS: Windows and SlintPad
• Programming Language: Slint
• Backend/Renderer: default

Product Impact

No response

[tronical]

This looks quite similar to #8276.

[tronical]

On second thought, no: It's been this way since commit d92c8ca. Imagine a stroke of 50px on a horizontal line. 25px of the stroke go above the line, 25px below. For computing the bounding box of the path, half of the stroke is taken into account at the top and half at the bottom.

I wonder if this should perhaps be configurable, like it is in JavaScript: https://developer.mozilla.org/en-US/docs/Web/API/SVGGraphicsElement/getBBox

[tronical]

I'm going to close this in favour of #1742 . It's unlikely that we'll change this behaviour, but with a new Path element that doesn't require a view box, this issue would go away, I think.