21 lines
946 B
C#
21 lines
946 B
C#
 
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using System.Globalization;
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namespace PrivaPub.Domain.Media
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{
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// A focal point as Mastodon's API takes it ("x,y", each within -1..1): finite numbers only, clamped to the frame. A NaN
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// once stored here made every status, timeline and Note holding the post fail to serialise, for every viewer.
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public static class FocalPoint
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{
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public static float[] Parse(string value)
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{
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if (value?.Split(',') is not [var x, var y]
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|| !float.TryParse(x, NumberStyles.Float, CultureInfo.InvariantCulture, out var fx) || !float.IsFinite(fx)
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|| !float.TryParse(y, NumberStyles.Float, CultureInfo.InvariantCulture, out var fy) || !float.IsFinite(fy))
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return default;
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return [Math.Clamp(fx, -1, 1), Math.Clamp(fy, -1, 1)];
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}
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/// <summary>Whether a stored focal point can be written out: two finite numbers.</summary>
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public static bool IsSound(float[] focus) => focus is [var x, var y] && float.IsFinite(x) && float.IsFinite(y);
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}
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}
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