#242 – Drawing Text Using DrawGlyphRun

If you want an even lower-level mechanism for drawing text than provided by DrawingContext.DrawText, you can use DrawingContext.DrawGlyphRun.

DrawGlyphRun lets you draw text based on glyphs, which are individual characters within a font that typically represent a single character in a language.

Below is an example of rendering the word “Wow” using DrawGlyphRun, in a custom DrawingVisual.

    class MyDrawingVisual : DrawingVisual
    {
        public MyDrawingVisual()
        {
            using (DrawingContext dc = RenderOpen())
            {
                GlyphRun gr = new GlyphRun(
                    new GlyphTypeface(new Uri(@"C:\Windows\Fonts\BKANT.TTF")),
                    0,       // Bi-directional nesting level
                    false,   // isSideways
                    96,      // pt size
                    new ushort[] { 58, 82, 90 },   // glyphIndices
                    new Point(100.0, 100.0),           // baselineOrigin
                    new double[] { 80.0, 45.0, 0.0 },  // advanceWidths
                    null,    // glyphOffsets
                    null,    // characters
                    null,    // deviceFontName
                    null,    // clusterMap
                    null,    // caretStops
                    null);   // xmlLanguage

                // Draw the text at a location
                dc.DrawGlyphRun(Brushes.Black, gr);
            }
        }
    }

The glyphIndices parameter specifies a list of indexes into the font for the glyphs that are to be rendered.

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

One Response to #242 – Drawing Text Using DrawGlyphRun

  1. sabuncu says:

    In this case, BeginInit() and EndInit() are not required, is this correct? Thank you.

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