ICanvasImage GetMagicWandMask(List <Vector2> points, float zoomFactor)
{
// What color did the user click on?
Vector2 clickPoint = Vector2.Clamp(points.First(), Vector2.Zero, SourceBitmap.Size.ToVector2() - Vector2.One);
Color clickColor = SourceBitmap.GetPixelColors((int)clickPoint.X, (int)clickPoint.Y, 1, 1).Single();
// How far they have dragged = selection tolerance.
float dragDistance = Vector2.Distance(points.First(), points.Last());
float chromaTolerance = Math.Min(dragDistance / 512 * zoomFactor, 1);
return(new ColorMatrixEffect
{
Source = new ChromaKeyEffect
{
Source = SourceBitmap,
Color = clickColor,
Tolerance = chromaTolerance,
InvertAlpha = true
},
ColorMatrix = new Matrix5x4
{
// Preserve alpha.
M44 = 1,
// Set RGB = white.
M51 = 1,
M52 = 1,
M53 = 1,
}
});
}
public void Dispose()
{
if (iDisposed)
{
return;
}
try
{
if (SourceBitmap != null)
{
if (SourceBitmap.Tag != null && SourceBitmap.Tag is BitmapTag)
{
System.IO.Stream s = ((BitmapTag)SourceBitmap.Tag).Source;
if (s != null)
{
s.Dispose();
}
}
SourceBitmap.Dispose();
}
}
finally {
if (destinationBitmap != null)
{
destinationBitmap.Dispose();
}
}
iDisposed = true;
GC.SuppressFinalize(this);
}
public void SetBytes(byte[] pixels, int x, int y, int width, int height)
{
Int32Rect cutArea = new Int32Rect(x, y, width, height);
//SourceBitmap.Lock();
SourceBitmap.CopyPixels(cutArea, BitmapBytes, Stride, 0);
//SourceBitmap.Unlock();
BitmapSource newBitmap = BitmapSource.Create(width, height, 96.0, 96.0, PixelFormats.Bgr32, null, BitmapBytes, Stride);
WriteableBitmap tempBitmap = new WriteableBitmap(newBitmap);
Initialize(tempBitmap);
//SourceBitmap.WritePixels(new Int32Rect(0, 0, width, height), pixels, Stride, 0);
}
/// <summary>
/// zapise PropertyItem do obrazku
/// </summary>
/// <param name="Id"></param>
/// <returns></returns>
public void SetPropertyItem(PropertyTagId TagId, string Text)
{
CheckSrcBitmap();
// ziskani nove instance PropertyItem
Encoding EncAscii = Encoding.ASCII;
PropertyItem NewPItem = CreatePropertyItem(PropertyTagType.ASCII, TagId, Text.Length, EncAscii.GetBytes(Text));
// zapis do Bitmapy
if (NewPItem != null)
{
SourceBitmap.SetPropertyItem(NewPItem);
}
}
private void Dispose(bool Disposing)
{
if (!Disposed)
{
Disposed = true;
SourceBitmap.Dispose();
SourceHandle.Free();
GrayScaleBitmap.Dispose();
GrayScaleHandle.Free();
ProcessedBitmap.Dispose();
ProcessedHandle.Free();
if (Disposing)
{
SourceBitmap = null;
SourceArr = null;
GrayScaleBitmap = null;
GrayScaleArr = null;
ProcessedBitmap = null;
ProcessedArr = null;
}
}
}
