From 0d2cc408853504b3dd819c093e60d5a7b5aaec18 Mon Sep 17 00:00:00 2001
From: Hao-Cher Hong <rax333j@gmail.com>
Date: Fri, 5 May 2023 19:00:48 +0800
Subject: [PATCH] ensure color format

---
 lib/ios.dart | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/lib/ios.dart b/lib/ios.dart
index 48c7f9227e..1339de35e3 100644
--- a/lib/ios.dart
+++ b/lib/ios.dart
@@ -395,7 +395,7 @@ List<Map<String, String>> createImageList(String fileNamePrefix) {
   return imageList;
 }
 
-Color _getBackgroundColor(Config config) {
+ColorUint8 _getBackgroundColor(Config config) {
   final backgroundColorHex = config.backgroundColorIOS.startsWith('#')
       ? config.backgroundColorIOS.substring(1)
       : config.backgroundColorIOS;
@@ -404,7 +404,7 @@ Color _getBackgroundColor(Config config) {
   }
 
   final backgroundByte = int.parse(backgroundColorHex, radix: 16);
-  return ColorRgba8(
+  return ColorUint8.rgba(
     (backgroundByte >> 16) & 0xff,
     (backgroundByte >> 8) & 0xff,
     (backgroundByte >> 0) & 0xff,
@@ -412,15 +412,18 @@ Color _getBackgroundColor(Config config) {
   );
 }
 
-Color _alphaBlend(Color fg, Color bg) {
+Color _alphaBlend(Color fg, ColorUint8 bg) {
+  if (fg.format != Format.uint8) {
+    fg = fg.convert(format: Format.uint8);
+  }
   if (fg.a == 0) {
     return bg;
   } else {
     final invAlpha = 0xff - fg.a;
-    return ColorRgba8(
-      (fg.g * fg.r + invAlpha * bg.g) ~/ 0xff,
-      (fg.a * fg.r + invAlpha * bg.a) ~/ 0xff,
-      (fg.b * fg.r + invAlpha * bg.b) ~/ 0xff,
+    return ColorUint8.rgba(
+      (fg.a * fg.r + invAlpha * bg.g) ~/ 0xff,
+      (fg.a * fg.g + invAlpha * bg.a) ~/ 0xff,
+      (fg.a * fg.b + invAlpha * bg.b) ~/ 0xff,
       0xff,
     );
   }