{

public partial class MainPage : PhoneApplicationPage

{

WriteableBitmap originBitmap;

WriteableBitmap editedBitmap;

ApplicationBarIconButton fileChooseButton;

ApplicationBarIconButton fileSaveButton;

ApplicationBarMenuItem aboutItem;

// コンストラクター

public MainPage()

{

InitializeComponent();

// ApplicationBarItemを追加

this.fileChooseButton = new ApplicationBarIconButton

{

IconUri = new Uri("/icons/appbar.folder.rest.png", UriKind.Relative),

Text = "読み込み"

};

this.fileSaveButton = new ApplicationBarIconButton

{

IconUri = new Uri("/icons/appbar.save.rest.png", UriKind.Relative),

Text = "保存",

IsEnabled = false

};

this.aboutItem = new ApplicationBarMenuItem

{

Text = "バージョン情報"

};

this.ApplicationBar.Buttons.Add(this.fileChooseButton);

this.ApplicationBar.Buttons.Add(this.fileSaveButton);

this.ApplicationBar.MenuItems.Add(this.aboutItem);

this.fileChooseButton.Click += new EventHandler(fileChooseButton_Click);

this.fileSaveButton.Click += new EventHandler(fileSaveButton_Click);

this.aboutItem.Click += new EventHandler(aboutItem_Click);

}

private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)

{

if (this.pictureImage.Source == null)

{

this.startMessageShow.Begin();

}

else

{

this.startMessageGrid.Visibility = System.Windows.Visibility.Collapsed;

}

}

private void fileChooseButton_Click(object sender, EventArgs e)

{

// 画像を選ぶ

var task = new PhotoChooserTask

{

PixelHeight = 800,

PixelWidth = 600,

ShowCamera = true

};

task.Completed += (ps, pe) =>

{

if (pe.TaskResult == TaskResult.OK && pe.Error == null)

{

this.originBitmap = ConvertToWriteableBitmap(pe.ChosenPhoto);

this.editedBitmap = ApplyYey(Grayscare(this.originBitmap));

this.pictureImage.Source = editedBitmap.ToBitmapImage();

this.fileSaveButton.IsEnabled = true;

this.startMessageGrid.Visibility = System.Windows.Visibility.Collapsed;

}

else if (pe.TaskResult == TaskResult.Cancel && pe.Error != null)

{

MessageBox.Show(

"PCでZune Softwareと同期中の可能性があります。\n" +

"Zune Softwareを終了するか、端末をPCから切断してもう一度実行して下さい。",

"エラー",

MessageBoxButton.OK);

}

};

task.Show();

}

private void fileSaveButton_Click(object sender, EventArgs e)

{

this.editedBitmap.SaveToMediaLibrary(DateTime.Now.ToString("yyyyMMdd_HHmmss") + ".jpg");

MessageBox.Show("保存しました。");

}

void aboutItem_Click(object sender, EventArgs e)

{

this.NavigationService.Navigate(new Uri("/AboutPage.xaml", UriKind.Relative));

}

/// <summary>

/// ストリームを WriteableBitmap に変換します。

/// </summary>

/// <param name="st"></param>

/// <returns></returns>

private WriteableBitmap ConvertToWriteableBitmap(Stream st)

{

using (var s = PictureExtension.PhotoStreamToMemoryStream(st))

{

try

{

var size = PictureExtension.GetOriginalSize(s);

WriteableBitmap bitmap = null;

bitmap = new WriteableBitmap((int)size.Width, (int)size.Height);

// WriteableBitmapに画像を読み込ませる

s.Seek(0, SeekOrigin.Begin);

bitmap.LoadJpeg(s);

return bitmap;

}

catch

{

return null;

}

}

}

/// <summary>

/// 画像をグレースケールにします。

/// </summary>

/// <param name="bitmap"></param>

/// <returns></returns>

private WriteableBitmap Grayscare(WriteableBitmap bitmap)

{

var edit = bitmap.Clone();

edit.ToGrayScale();

return edit;

//using (var s = PictureExtension.PhotoStreamToMemoryStream(bitmap))

//{

// var size = PictureExtension.GetOriginalSize(s);

// WriteableBitmap edit = null;

// this.originBitmap = new WriteableBitmap((int)size.Width, (int)size.Height);

// edit = new WriteableBitmap((int)size.Width, (int)size.Height);

// // WriteableBitmapに画像を読み込ませる

// s.Seek(0, SeekOrigin.Begin);

// this.originBitmap.LoadJpeg(s);

// // editableの方にも同じのをコピー

// edit = this.originBitmap.Clone();

// // グレスケ化

// edit = this.originBitmap.ToGrayScale();

// return edit;

//}

}

/// <summary>

/// 画像に遺影を重ねます。

/// </summary>

/// <param name="bitmap"></param>

/// <returns></returns>

private WriteableBitmap ApplyYey(WriteableBitmap bitmap)

{

var wb = bitmap.Clone();

var file = Application.GetResourceStream(new Uri("photoframe.png", UriKind.Relative));

var yey = new WriteableBitmap(wb.PixelWidth, wb.PixelHeight);

yey.LoadJpeg(file.Stream);

for (int i = 0; i < yey.Pixels.Length; i++)

{

var oPx = yey.Pixels[i];

var a2 = Convert.ToByte((oPx >> 24) & 0xff);

var ax2 = (double)a2 / 255;

if (a2 == 0)

{

// 透明なので下地を描画

}

else if (a2 == 255)

{

// 不透明なので上に書き込み

wb.Pixels[i] = yey.Pixels[i];

}

else

{

// 下地の画像の色を取り出す

var a = Convert.ToByte((wb.Pixels[i] >> 24) & 0xff);

var r = Convert.ToByte((wb.Pixels[i] >> 16) & 0xff);

var g = Convert.ToByte((wb.Pixels[i] >> 8) & 0xff);

var b = Convert.ToByte((wb.Pixels[i]) & 0xff);

// 枠の色を取り出す

var r2 = Convert.ToByte((oPx >> 16) & 0xff);

var g2 = Convert.ToByte((oPx >> 8) & 0xff);

var b2 = Convert.ToByte((oPx) & 0xff);

// アルファ値を元に合成

var a3 = Convert.ToByte((a * (1.0 - ax2) + a2 * ax2));

var r3 = Convert.ToByte((r * (1.0 - ax2) + r2 * ax2));

var g3 = Convert.ToByte((g * (1.0 - ax2) + g2 * ax2));

var b3 = Convert.ToByte((b * (1.0 - ax2) + b2 * ax2));

wb.Pixels[i] = a3 << 24 | r3 << 16 | g3 << 8 | b3;

}

}

wb.Invalidate();

return wb;

}

}

}