!46 【挑单】限制图片长宽范围

Merge pull request !46 from Zhouyj/cherry-pick-1674976630

src/hb-ot-color-sbix-table.hh

@@ -298,6 +298,12 @@ struct sbix
 
       const PNGHeader &png = *blob->as<PNGHeader>();
 
+      if (png.IHDR.height >= 65536 | png.IHDR.width >= 65536)
+      {
+        hb_blob_destroy (blob);
+        return false;
+      }
+
       extents->x_bearing = x_offset;
       extents->y_bearing = png.IHDR.height + y_offset;
       extents->width     = png.IHDR.width;