measureText method returns different values in windows and linux container

[selvarathinamm]

Description

Values returned by measureText in linux container and in windows are not same.

Code

SKPaint paint = new SKPaint();
paint.Typeface = SKTypeface.FromFamilyName("Calibri", SKTypefaceStyle.Bold);
paint.IsAntialias = true;
paint.TextSize = 19;
SKRect rect = new SKRect();
float width = paint.MeasureText("Progressive Report Template", ref rect);

Expected Behavior

Values should be same

Actual Behavior

In windows I'm getting 228.213379 and in linux container the same code returns 231 as width.

Basic Information

• Version with issue: 1.59.3
• Last known good version:
• IDE: Visual Studio

I'm using these fonts in both windows and linux container.
Calibri.zip

[mattleibow]

List linking this issue fore reference: #707

[mattleibow]

Thanks for the repro, I'll investigate.

[selvarathinamm]

Thank you for looking into it. Please do let me know if you need any additional info.

[mattleibow]

When measuring fonts, there are 2 components that influence the values - the font and the measuring logic.

The line:

SKTypeface.FromFamilyName("Calibri", SKTypefaceStyle.Bold);

assume the font is installed? Is this the case?

And then it may also be the case that Windows DirectWrite and Linux FontConfig may be doing different things.

SkiaSharp does not do much in the way of fonts and rendering, and in order to measure some string it needs to be shaped. This is probably a reason to use RichTextKit.

[Gillibald]

FromFamilyName asks the current font manager for a typeface that is matching the name. This will be an installed font and it can be any font that relates to the specified name. On Linux this can be an alias.

To be sure to get the same rendering on all platforms you need to load a typeface via stream.