private bool SaveImageFile(Drawing drawing, string fileName,
string imageFileName)
{
string outputExt = this.GetImageFileExtention();
string outputFileName = null;
if (String.IsNullOrEmpty(imageFileName))
{
string fileNameWithoutExt =
Path.GetFileNameWithoutExtension(fileName);
string workingDir = Path.GetDirectoryName(fileName);
outputFileName = Path.Combine(workingDir,
fileNameWithoutExt + outputExt);
}
else
{
string fileExt = Path.GetExtension(imageFileName);
if (String.IsNullOrEmpty(fileExt))
{
outputFileName = imageFileName + outputExt;
}
else if (!String.Equals(fileExt, outputExt,
StringComparison.OrdinalIgnoreCase))
{
outputFileName = Path.ChangeExtension(imageFileName, outputExt);
}
}
BitmapEncoder bitampEncoder = this.GetBitmapEncoder(outputExt);
// The image parameters...
Rect drawingBounds = drawing.Bounds;
int pixelWidth = (int)drawingBounds.Width;
int pixelHeight = (int)drawingBounds.Height;
double dpiX = 96;
double dpiY = 96;
// The Visual to use as the source of the RenderTargetBitmap.
DrawingVisualEx drawingVisual = new DrawingVisualEx();
DrawingContext drawingContext = drawingVisual.RenderOpen();
drawingContext.DrawDrawing(drawing);
drawingContext.Close();
// The BitmapSource that is rendered with a Visual.
RenderTargetBitmap targetBitmap = new RenderTargetBitmap(
pixelWidth, pixelHeight, dpiX, dpiY, PixelFormats.Pbgra32);
targetBitmap.Render(drawingVisual);
// Encoding the RenderBitmapTarget as an image file.
bitampEncoder.Frames.Add(BitmapFrame.Create(targetBitmap));
using (FileStream stream = File.Create(outputFileName))
{
bitampEncoder.Save(stream);
}
return(true);
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public DrawingVisualEx GetVisual()
{
DrawingVisualEx visual = new DrawingVisualEx(this);
using (DrawingContext drawingContext = visual.RenderOpen())
{
drawingContext.DrawLine(new Pen(IsSelected ? CanvasParam.PenSelectedColor : CanvasParam.PenColor, CanvasParam.Thikness / CanvasParam.Scale),
new Point(X1, CanvasParam.CanvasHeight - Y1), new Point(X2, CanvasParam.CanvasHeight - Y2));
}
visual.Transform = new ScaleTransform(CanvasParam.Scale, CanvasParam.Scale, 0, CanvasParam.CanvasHeight);
return(visual);
}
