Short pen strike shows up as an ink blob

[WhitespaceQ]

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Describe the bug

When I'm writing, short line (see picture) shows up as ink blob almost half the time. This doesn't happen with another writing/drawing app.

To reproduce

I don't have procedure that can reproduce this consistently

1. Open up Saber and connect POCO Smart Pen
2. Create a blank notes
3. Write something with short line strike
4. Line shows up as blob

Expected behavior

Short line strike shows up as line, following what were written

Saber version

v0.25.1 Google Play (25010)

Device

• Device: Poco Pad Model 2405CPCFBG
• OS: Xiaomi HyperOS 1.0.9.0
• Pen: POCO Smart Pen (fw: 2.1.16)

Anything else?

This happens more frequently on Fountain pen but also occurs in Ballpoint pen

[WhitespaceQ]

The size of the blob seems inconsistent but roughly follows how long the line length and/or the pen pressure

[superbm14]

I have the same issue with my wacom tablet on Linux (snap, v0.25.2 edge). For me, the blob appears when I activate the rubber or continue writing a new strike. Disabling pressure sensibility makes the problem disappear.

[ZebraVogel94349]

Those dots appear whenever a stroke consists of only 1 or 2 points. If it consists of two points, the dots diameter is equal to their vertical distance.
https://github.com/saber-notes/saber/blob/main/lib%2Fcomponents%2Fcanvas%2F_canvas_painter.dart#L138-L143
So, if you draw a small stroke so quickly that it is only registered as two points, the result is a dot.