Function drawOledBitmapText5x7

app.js:3563–3608

(ctx, text, x, y, w, h, color, scale = 1)

];

function drawOledBitmapText5x7(ctx, text, x, y, w, h, color, scale = 1) {
  const sx = Math.max(1, Math.floor(scale));
  const sy = sx;
  const maxW = Math.max(0, Math.floor(w));
  const maxH = Math.max(0, Math.floor(h));
  const startX = Math.floor(x);
  const startY = Math.floor(y);
  let cx = 0;
  let cy = 0;
  const charW = 6 * sx; // 5 + 1 spacing
  const charH = 8 * sy; // 7 + 1 spacing

  ctx.fillStyle = color;
  const lines = String(text || "").split(/\r?\n/);
  for (let li = 0; li < lines.length; li++) {
    const line = lines[li];
    cx = 0;
    for (let k = 0; k < line.length; k++) {
      const ch = line.charCodeAt(k) & 0xff;
      if (ch < 32 || ch > 127) {
        cx += charW;
        continue;
      }
      if (cx + charW > maxW) break;
      if (cy + charH > maxH) return;

      const base = (ch - 32) * 5;
      for (let col = 0; col < 5; col++) {
        const bits = OLED_FONT_5X7[base + col] || 0;
        for (let row = 0; row < 7; row++) {
          if ((bits >> row) & 0x01) {
            const px = startX + cx + col * sx;
            const py = startY + cy + row * sy;
            // clip
            if (px < startX || py < startY) continue;
            if (px >= startX + maxW || py >= startY + maxH) continue;
            ctx.fillRect(px, py, sx, sy);
          }
        }
      }
      cx += charW;
    }
    cy += charH;
    if (cy + charH > maxH) return;
  }
}

function drawOledThresholdedText(ctx, text, x, y, w, h, textSize, color) {
  const ts = Number(textSize || 1);