sdfsdfs

node_modules/pixi.js/lib/utils/canvas/getCanvasBoundingBox.mjs

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+import { Rectangle } from '../../maths/shapes/Rectangle.mjs';
+
+"use strict";
+function checkRow(data, width, y) {
+  for (let x = 0, index = 4 * y * width; x < width; ++x, index += 4) {
+    if (data[index + 3] !== 0)
+      return false;
+  }
+  return true;
+}
+function checkColumn(data, width, x, top, bottom) {
+  const stride = 4 * width;
+  for (let y = top, index = top * stride + 4 * x; y <= bottom; ++y, index += stride) {
+    if (data[index + 3] !== 0)
+      return false;
+  }
+  return true;
+}
+function getCanvasBoundingBox(canvas, resolution = 1) {
+  const { width, height } = canvas;
+  const context = canvas.getContext("2d", {
+    willReadFrequently: true
+  });
+  if (context === null) {
+    throw new TypeError("Failed to get canvas 2D context");
+  }
+  const imageData = context.getImageData(0, 0, width, height);
+  const data = imageData.data;
+  let left = 0;
+  let top = 0;
+  let right = width - 1;
+  let bottom = height - 1;
+  while (top < height && checkRow(data, width, top))
+    ++top;
+  if (top === height)
+    return Rectangle.EMPTY;
+  while (checkRow(data, width, bottom))
+    --bottom;
+  while (checkColumn(data, width, left, top, bottom))
+    ++left;
+  while (checkColumn(data, width, right, top, bottom))
+    --right;
+  ++right;
+  ++bottom;
+  return new Rectangle(left / resolution, top / resolution, (right - left) / resolution, (bottom - top) / resolution);
+}
+
+export { getCanvasBoundingBox };
+//# sourceMappingURL=getCanvasBoundingBox.mjs.map