public static ImageTools.Image ToImage(WriteableBitmap bitmap)
{
bitmap.Invalidate();
ImageTools.Image image = new ImageTools.Image(bitmap.PixelWidth, bitmap.PixelHeight);
try
{
for (int y = 0; y < bitmap.PixelHeight; ++y)
{
for (int x = 0; x < bitmap.PixelWidth; ++x)
{
int pixel = bitmap.Pixels[bitmap.PixelWidth * y + x];
byte a = (byte)((pixel >> 24) & 0xFF);
float aFactor = a / 255f;
byte r = (byte)(((pixel >> 16) & 0xFF) / aFactor);
byte g = (byte)(((pixel >> 8) & 0xFF) / aFactor);
byte b = (byte)((pixel & 0xFF) / aFactor);
image.SetPixel(x, y, r, g, b, a);
}
}
}
catch (System.Security.SecurityException e)
{
throw new ArgumentException("Bitmap cannot accessed", e);
}
return image;
}
private void btnOpen_Click(object sender, RoutedEventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "JPEG,PNG,BMPファイル (*.jpg,*.png,*.bmp)|*.jpg;*.png;*.bmp";
ofd.Multiselect = false;
if (ofd.ShowDialog() != true) return;
string fn = ofd.File.Name.ToLower();
IImageDecoder dec;
if (fn.EndsWith(".jpg"))
{
dec = new JpegDecoder();
}
else if (fn.EndsWith(".png"))
{
dec = new PngDecoder();
}
else if (fn.EndsWith(".bmp"))
{
dec = new BmpDecoder();
}
else
{
MessageBox.Show("エラー");
return;
}
try
{
FileStream fs = ofd.File.OpenRead();
ImageTools.Image img = new ImageTools.Image();
dec.Decode(img, fs);
if (img.Width < 50 || img.Height < 50)
{
MessageBox.Show("画像サイズが小さすぎます");
return;
}
WriteableBitmap wb = new WriteableBitmap(img.Width, img.Height);
byte[] data = img.GetPixels();
for (int y = 0; y < img.Height; y++)
{
for (int x = 0; x < img.Width; x++)
{
int idx = (x + y * img.Width) * 4;
wb.SetPixel(x, y, Color.FromArgb(data[idx + 3], data[idx], data[idx + 1], data[idx + 2]));
}
}
SetImage(wb);
fs.Close();
}
catch
{
MessageBox.Show("エラー");
}
}
//Point? mp = null;
//private void resizeHandle_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
//{
// mp = e.GetPosition((UIElement)sender);
// ((UIElement)sender).CaptureMouse();
//}
//private void resizeHandle_MouseMove(object sender, MouseEventArgs e)
//{
// if (mp != null)
// {
// }
//}
//private void resizeHandle_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
//{
// mp = null;
// ((Canvas)sender).ReleaseMouseCapture();
//}
private void LayoutRoot_Drop(object sender, DragEventArgs e)
{
var file = ((FileInfo[])e.Data.GetData(DataFormats.FileDrop))[0];
string fn = file.Name.ToLower();
WriteableBitmap wb = null;
if (fn.EndsWith(".jpg") || fn.EndsWith(".png"))
{
BitmapImage bi = new BitmapImage();
try
{
bi.SetSource(file.OpenRead());
if (bi.PixelWidth < 50 || bi.PixelHeight < 50)
{
MessageBox.Show("画像サイズが小さすぎます");
return;
}
}
catch
{
MessageBox.Show("エラー");
return;
}
wb = new WriteableBitmap(bi);
}
else if (fn.EndsWith(".bmp"))
{
IImageDecoder dec = new BmpDecoder();
FileStream fs = file.OpenRead();
ImageTools.Image img = new ImageTools.Image();
try
{
dec.Decode(img, fs);
}
catch
{
MessageBox.Show("エラー");
return;
}
if (img.Width < 50 || img.Height < 50)
{
MessageBox.Show("画像サイズが小さすぎます");
return;
}
wb = new WriteableBitmap(img.Width, img.Height);
byte[] data = img.GetPixels();
for (int y = 0; y < img.Height; y++)
{
for (int x = 0; x < img.Width; x++)
{
int idx = (x + y * img.Width) * 4;
wb.SetPixel(x, y, Color.FromArgb(data[idx + 3], data[idx], data[idx + 1], data[idx + 2]));
}
}
fs.Close();
}
else
{
MessageBox.Show("エラー");
return;
}
try
{
SetImage(wb);
}
catch
{
MessageBox.Show("エラー");
}
}
