boardToPic

src/modules/picture.js

@@ -35,5 +35,19 @@ export function picToBoard(pixels, width, height) {
     }
     return acc;
   }, []);
-  return toMatrix(flat, Math.max(width, height));
+
+  return toMatrix(flat, width, height);
+}
+
+// convert board to ImageData
+export function boardToPic(board, width, height) {
+  return board.flat().reduce((acc, cell, index) => {
+    const color = cell === 1 ? 0 : 255;
+    const i = index * 4;
+    acc.data[i] = color;
+    acc.data[i + 1] = color;
+    acc.data[i + 2] = color;
+    acc.data[i + 3] = 255;
+    return acc;
+  }, new ImageData(width, height));
 }