とりあえず、出来た版
メインとサブの位置関係とかの考慮がないので、自宅の場合、左右逆に表示されてしまう。
public partial class MainWindow : Window
{
const int SPI_SETDESKWALLPAPER = 20;
const int SPIF_UPDATEINIFILE = 0x01;
const int SPIF_SENDWININICHANGE = 0x02;
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern int SystemParametersInfo(
int uAction, int uParam, string lpvParam, int fuWinIni);
private string image1filename = "";
private string image2filename = "";
void setImage1filename(string filename)
{
image1filename = filename;
}
void setImage2filename(string filename)
{
image2filename = filename;
}
string getImage1filename()
{
return image1filename;
}
string getImage2filename()
{
return image2filename;
}
public MainWindow()
{
InitializeComponent();
}
private void button1_Click(object sender, RoutedEventArgs e)
{
// デスクトップサイズを調べる。
foreach (Screen s in Screen.AllScreens) {
textBlock1.Text = textBlock1.Text + s.Bounds + "\n";
}
// 何台モニタが接続されているか調べる。
//textBlock1.Text = SystemParameters.VirtualScreenHeight + ", " + SystemParameters.VirtualScreenWidth;
}
private void button2_Click(object sender, RoutedEventArgs e)
{
// 画像を選択する
Microsoft.Win32.OpenFileDialog dlg =new Microsoft.Win32.OpenFileDialog();
Nullable<bool> result = dlg.ShowDialog();
// Process open file dialog box results
if (result == true)
{
// Open document
string filename = dlg.FileName;
textBlock1.Text = textBlock1.Text + filename + "\n";
image2.Source =new BitmapImage( new Uri(filename));
setImage1filename(filename);
}
}
private void button3_Click(object sender, RoutedEventArgs e)
{
// 画像を選択する
Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();
Nullable<bool> result = dlg.ShowDialog();
// Process open file dialog box results
if (result == true)
{
// Open document
string filename = dlg.FileName;
textBlock1.Text = textBlock1.Text + filename + "\n";
image3.Source = new BitmapImage(new Uri(filename));
setImage2filename(filename);
}
}
private void button4_Click(object sender, RoutedEventArgs e)
{
//壁紙を生成し、壁紙を変更する。
// 1枚目の画像をバッファに読み込む。
Image myImage1 = new Image();
myImage1.Width = 1680;
BitmapImage myBitmapImage1 = new BitmapImage();
myBitmapImage1.BeginInit();
myBitmapImage1.UriSource = new Uri(getImage1filename());
myBitmapImage1.DecodePixelWidth = 1680;
myBitmapImage1.EndInit();
myImage1.Source = myBitmapImage1;
// 2枚目の画像を読み込む。
Image myImage2 = new Image();
myImage1.Width = 1680;
BitmapImage myBitmapImage2 = new BitmapImage();
myBitmapImage2.BeginInit();
myBitmapImage2.UriSource = new Uri(getImage2filename());
myBitmapImage2.DecodePixelWidth = 1680;
myBitmapImage2.EndInit();
myImage2.Source = myBitmapImage2;
int stride1 = (myBitmapImage1.PixelWidth * myBitmapImage1.Format.BitsPerPixel + 7) / 8;
byte[] data1 =
new byte[stride1 * myBitmapImage1.PixelHeight];
myBitmapImage1.CopyPixels(data1, stride1, 0);
int stride2 = (myBitmapImage2.PixelWidth * myBitmapImage2.Format.BitsPerPixel + 7) / 8;
byte[] data2 =
new byte[stride2 * myBitmapImage2.PixelHeight];
myBitmapImage2.CopyPixels(data2, stride2, 0);
//2枚を1枚の画像に読み込む。
int newWidth = myBitmapImage1.PixelWidth + myBitmapImage2.PixelWidth;
int newHeight = myBitmapImage1.PixelHeight;
// Define parameters used to create the BitmapSource.
PixelFormat pf = PixelFormats.Bgr32;
int width = newWidth;
int height = newHeight;
int rawStride = (width * pf.BitsPerPixel + 7) / 8;
byte[] rawImage = new byte[rawStride * height];
for (int y = 0; y < height; y++)
{
for (int x = 0; x < stride1+stride2; x++)
{
if (x < stride1)
{
// 1枚目の画像からピクセル値を取得する。
rawImage[x + y * rawStride] = data1[x + stride1 * y];
}
else
{
// 2枚目の
rawImage[x + y * rawStride] = data2[(x-stride1) + stride1 * y];
}
}
}
// Create a BitmapSource.
BitmapSource bitmap = BitmapSource.Create(width, height,
96, 96, pf, null,
rawImage, rawStride);
// Create an image element;
// Set image source.
image1.Source = bitmap;
//BMP形式でファイルに保存する
// 一時ファイルディレクトリの取得
string bmpFileName = System.IO.Path.GetTempPath() +"wallpaper.bmp";
BitmapFrame bmpFrame = BitmapFrame.Create(bitmap);
FileStream stream = new FileStream(bmpFileName, FileMode.Create);
BmpBitmapEncoder enc = new BmpBitmapEncoder();
enc.Frames.Add(bmpFrame);
enc.Save(stream);
stream.Close();
// 壁紙を変更する。
RegistryKey key = Registry.CurrentUser.OpenSubKey("Control Panel\\Desktop", true);
key.SetValue(@"WallpaperStyle", "1");
key.SetValue(@"TileWallpaper", "1");
SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, bmpFileName, SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);
}
}
