/// <summary>
/// 获取图片主颜色
/// </summary>
/// <param name="b"></param>
/// <param name="backgroundBrush"></param>
/// <returns></returns>
public static async Task <SolidColorBrush> GetMajorColorAndBlur(byte[] b, ImageBrush backgroundBrush)
{
WriteableBitmap wb = new WriteableBitmap(1000, 1500);
using (IRandomAccessStream iras = b.AsBuffer().AsStream().AsRandomAccessStream())
{
await wb.SetSourceAsync(iras);
}
//高斯模糊
BlurEffect be = new BlurEffect(wb);
backgroundBrush.ImageSource = await be.ApplyFilter(10);//高斯模糊等级可以自己定义
//取主色调并应用到TagsTextBlock
return(new SolidColorBrush(GetColor.GetMajorColor(wb)));
}
public static async Task GetBingTheme()
{
try
{
var httpclient = new System.Net.Http.HttpClient();
var picbytes = await httpclient.GetByteArrayAsync("http://appserver.m.bing.net/BackgroundImageService/TodayImageService.svc/GetTodayImage?dateOffset=0&urlEncodeHeaders=true&osName=windowsPhone&osVersion=8.10&orientation=480x800&deviceName=WP8&mkt=en-US");
var picfile = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Theme/Skin/Bing/background.jpg"));
await FileIO.WriteBytesAsync(picfile, picbytes);
WriteableBitmap wb = new WriteableBitmap(1000, 1500);
await wb.SetSourceAsync(await picfile.OpenAsync(FileAccessMode.Read));
var bingtheme = new BingThemeData();
bingtheme.BackgroundColor = GetColor.GetMajorColor(wb);
bingtheme.BackgroundColor1 = Color.FromArgb(190, bingtheme.BackgroundColor.R, bingtheme.BackgroundColor.G, bingtheme.BackgroundColor.B);
var rgb = bingtheme.BackgroundColor.R * 0.299 + bingtheme.BackgroundColor.G * 0.587 + bingtheme.BackgroundColor.B * 0.114;
bingtheme.BackgroundColor2 = bingtheme.BackgroundColor;
if (rgb >= 192)
{
{
bingtheme.Foreground = Colors.White;
bingtheme.Front1 = Colors.White;
bingtheme.Front2 = Color.FromArgb(255, 185, 185, 185);
bingtheme.List_Background = Color.FromArgb(100, 103, 103, 103);
}
}
else
{
bingtheme.Foreground = Colors.White;
bingtheme.Front1 = Colors.Black;
bingtheme.Front2 = Color.FromArgb(255, 124, 124, 124);
bingtheme.List_Background = Color.FromArgb(180, 255, 255, 255);
}
string xamlstring = await PathIO.ReadTextAsync("ms-appx:///Theme/BingTemp.txt");
xamlstring = String.Format(xamlstring, bingtheme.BackgroundColor.ToString(), bingtheme.BackgroundColor1.ToString(), bingtheme.BackgroundColor2.ToString(), bingtheme.Foreground.ToString(), bingtheme.Front1.ToString(), bingtheme.Front2.ToString(), bingtheme.List_Background.ToString());
var xamlfile = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Theme/BingTheme.xaml"));
await FileIO.WriteTextAsync(xamlfile, xamlstring);
}
catch (Exception)
{
await new MessageDialog("无网络连接!").ShowAsync();
}
}
/// <summary>
/// 读取本地专辑图片修改背景图
/// </summary>
async void ChangeImage()
{
//判断Local是否有文件
if (await ApplicationData.Current.LocalFolder.TryGetItemAsync(ConfigService.ImageFilename) is StorageFile localFile)//本地有专辑图片，读取
{
WriteableBitmap writeableBitmap = await FileHelper.OpenWriteableBitmapFile(localFile);
SolidColorBrush solidColorBrush = new SolidColorBrush(GetColor.GetMajorColor(writeableBitmap));
mainImageBrush.ImageSource = writeableBitmap;
mainImageBrush.Stretch = Stretch.UniformToFill;
mainGrid.Background = mainImageBrush;
solidColorBrush.Color = OtherHelper.ChangeColor(solidColorBrush.Color, (float)0.4);
backgroundBrush = solidColorBrush;
}
else//本地无专辑图片
{
SolidColorBrush solidColorBrush = new SolidColorBrush(Colors.Gray);
mainGrid.Background = solidColorBrush;
backgroundBrush = solidColorBrush;
}
}