`stroke()` does not handle float values correctly

stroke() appears to mis-handle float inputs. When using floats (e.g. 150.0), the rendered color is incorrect

Expected behavior

Float values in the same range as integers should produce identical results, as in Processing.

Actual behavior

• stroke(150) → correct grayscale
• stroke(150.0) → renders as white

Reproduction (mewnala)

from mewnala import *

def setup():
    size(640, 360)
    background(255)

def draw():
    stroke(150.0)
    line(0, 0, width, height)
    line(width, 0, 0, height)

    stroke(155.0, 100.0, 0.0)
    line(0, height // 2, width, height // 2)
    line(width // 2, 0, width // 2, height)

run()

Equivalent Processing sketch (works as expected)

void setup() {
  size(640, 360);
  background(255);
}

void draw() {
  stroke(150.0);
  line(0, 0, width, height);
  line(width, 0, 0, height);

  stroke(155.0, 100.0, 0.0);
  line(0, height/2, width, height/2);
  line(width/2, 0, width/2, height);
}

Inizia individuando l’implementazione Rust di stroke() ed eseguendo la riproduzione mewnala fornita. Confronta la gestione degli input in scala di grigi e RGB interi e a virgola mobile, usando lo sketch di Processing come riferimento atteso. Il lavoro è concluso quando valori a virgola mobile e interi equivalenti producono gli stessi colori, con copertura nei test pertinenti, se esistono.