opt: item

opt: util

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/utils/danmaku_utils.dart

@@ -0,0 +1,22 @@
+import 'package:canvas_danmaku/models/danmaku_content_item.dart';
+import 'package:flutter/material.dart';
+
+class DmUtils {
+  static Color decimalToColor(int decimalColor) {
+    // 16777215 表示白色
+    int red = (decimalColor >> 16) & 0xFF;
+    int green = (decimalColor >> 8) & 0xFF;
+    int blue = decimalColor & 0xFF;
+
+    return Color.fromARGB(255, red, green, blue);
+  }
+
+  static DanmakuItemType getPosition(int mode) {
+    return switch (mode) {
+      4 => DanmakuItemType.bottom,
+      5 => DanmakuItemType.top,
+      7 => DanmakuItemType.special,
+      _ => DanmakuItemType.scroll,
+    };
+  }
+}