C# GraphicsPath adding text with opacity

Question

I'm using the following code to add text to a image:

    private void AddText(Graphics graphics, FontDetails fontDetails, Rectangle destination)
    {
        using (GraphicsPath graphicsPath = new GraphicsPath())
        {
            graphicsPath.AddString(
                "My sample text",
                fontDetails.FontFamily,
                fontDetails.FontStyle,
                fontDetails.FontEmHeight,
                destination,
                fontDetails.FontStringFormat
            );

            graphics.FillPath(new SolidBrush(FontColour), graphicsPath);
        }
    }

This is working perfectly. I want to be able to apply an opacity effect to the text, but cannot seem to find an option to do this.

Any help would be greatly appreciated.

Use alpha, like FontColour = Color.FromArgb(32, Color.Black); Dispose the brush. — Hans Passant, Mar 03 '16 at 16:58

score 1 · Accepted Answer · answered Mar 03 '16 at 16:59

I think you can add an opacity value to the solid brush if you construct it like this:

SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(128, 0, 0, 255));
graphics.FillPath(semiTransBrush, graphicsPath);

When you fill a shape, you must pass a Brush object to one of the fill methods of the Graphics class. The one parameter of the SolidBrush constructor is a Color object. To fill an opaque shape, set the alpha component of the color to 255. To fill a semitransparent shape, set the alpha component to any value from 1 through 254.

https://msdn.microsoft.com/en-us/library/5s2dwfx1(v=vs.110).aspx

C# GraphicsPath adding text with opacity

1 Answers1