Method drawFinderPattern

src/third-party/qrcodegen/index.ts:315–325

(x: int, y: int)

		// Draws a 9*9 finder pattern including the border separator,
		// with the center module at (x, y). Modules can be out of bounds.
		private drawFinderPattern(x: int, y: int): void {
			for (let dy = -4; dy <= 4; dy++) {
				for (let dx = -4; dx <= 4; dx++) {
					const dist: int = Math.max(Math.abs(dx), Math.abs(dy));  // Chebyshev/infinity norm
					const xx: int = x + dx;
					const yy: int = y + dy;
					if (0 <= xx && xx < this.size && 0 <= yy && yy < this.size)
						this.setFunctionModule(xx, yy, dist != 2 && dist != 4);
				}
			}
		}


		// Draws a 5*5 alignment pattern, with the center module