Initial Phoenix analyzer

2026-06-02 20:56:19 +02:00
commit e499bac928
62 changed files with 28893 additions and 0 deletions
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+// meters/scale_helpers.js — shared helpers for drawing center-scale grid lines
+
+export const METER_HEADER_FONT = 'bold 12px ui-monospace, monospace';
+
+/**
+ * Draws a hairline-style grid (like the RMS meter) across a center column.
+ * The caller provides the existing mapY function so non-linear scales are supported.
+ */
+export function drawHairlineGrid(
+  g,
+  rect,
+  mapY,
+  topValue,
+  bottomValue,
+  step = 1,
+  color = 'rgba(255,255,255,0.08)',
+  lineWidth = 0.6
+) {
+  if (!g || !rect || typeof mapY !== 'function') return;
+  if (!Number.isFinite(step) || step <= 0) return;
+
+  const hi = Math.max(topValue, bottomValue);
+  const lo = Math.min(topValue, bottomValue);
+
+  g.save();
+  g.beginPath();
+  g.rect(rect.x, rect.y, rect.w, rect.h);
+  g.clip();
+
+  for (let v = hi; v >= lo - 1e-6; v -= step) {
+    const y = Math.round(mapY(v)) + 0.5;
+    if (!Number.isFinite(y)) continue;
+    if (y < rect.y - 2 || y > rect.y + rect.h + 2) continue;
+
+    g.strokeStyle = color;
+    g.lineWidth = lineWidth;
+    g.beginPath();
+    g.moveTo(rect.x, y);
+    g.lineTo(rect.x + rect.w, y);
+    g.stroke();
+  }
+
+  g.restore();
+}