Font scaling between devices when using DrawText()

[martyn73]

In an indicator I use a copy of the chart control font.

Example:

SimpleFont baseFont = (SimpleFont)ChartControl.Properties.LabelFont.Clon e();

SharpDX.DirectWrite.TextFormat textFormat = new SharpDX.DirectWrite.TextFormat(Core.Globals.Direct WriteFactory, baseFont.Family.ToString(), SharpDX.DirectWrite.FontWeight.Normal, SharpDX.DirectWrite.FontStyle.Normal, SharpDX.DirectWrite.FontStretch.UltraCondensed, (float)baseFont.Size);

RenderTarget.DrawText("Label", textFormat, reuseRect, myDxBrush);

(reuseRect is a RectangleF)

All works well but when I render text this way on my MS Surface tablet, the rendered font is about half the size it should be. While the font of the chart standard objects are rendering at the correct size. I assume this has something to do with scaling. How do I make sure that my font matches the size of the ChartControl font when rendering text using the DrawText method? Thanks.

[NinjaTrader_Jim]

Hello martyn73,

Thanks for your post.

I am not able to test on this device, but I would assume that the way the textFormat is configured is creating the difference in behavior. I would suggest testing with the following to clone the SimpleFont as a DX font.

SharpDX.DirectWrite.TextFormat textFormat = font.ToDirectWriteTextFormat();

If this resolves the matter, please let us know the textFormat properties you see when performing the above as it can help others making their own TextFormats.

I look forward to hearing back..

[martyn73]

Thanks Jim, that fixed it!