/// <summary>
/// This function convert the Canvas control to the Bitmap Image.
/// </summary>
/// <param name="surface">
/// Canvas control Object want to convert.
/// </param>
/// <returns>
/// Bitmap Object containing Canvas control Image.
/// </returns>
public static System.Drawing.Bitmap CanvasToBitmap(System.Windows.Controls.Canvas surface)
{
System.Drawing.Bitmap BmpOut = null;
try
{
try
{
File.Delete("C:\\Images\\Img.jpg");
}
catch (Exception)
{ }
Uri path = new Uri("C:\\Images\\Img.jpg");
// Save current canvas transform
Transform transform = surface.LayoutTransform;
// reset current transform (in case it is scaled or rotated)
surface.LayoutTransform = null;
// Get the size of canvas
Size size = new Size(surface.ActualWidth, surface.ActualHeight);
// Measure and arrange the surface
// VERY IMPORTANT
surface.Measure(size);
surface.Arrange(new Rect(size));
// Create a render bitmap and push the surface to it
RenderTargetBitmap renderBitmap =
new RenderTargetBitmap(
(int)size.Width,
(int)size.Height,
96d,
96d,
PixelFormats.Pbgra32);
renderBitmap.Render(surface);
// Create a file stream for saving image
using (FileStream outStream = new FileStream(path.LocalPath, FileMode.Create))
{
// Use png encoder for our data
PngBitmapEncoder encoder = new PngBitmapEncoder();
// push the rendered bitmap to it
encoder.Frames.Add(BitmapFrame.Create(renderBitmap));
// save the data to the stream
encoder.Save(outStream);
}
// Restore previously saved layout
surface.LayoutTransform = transform;
Thread.Sleep(200);
BmpOut = new System.Drawing.Bitmap("C:\\Images\\Img.jpg");
}
catch (Exception)
{ }
return(BmpOut);
}
// renders a bitmap image and save as a png file
public static void RenderImage(int width, int height, string path, System.Windows.Controls.Canvas canvas)
{
canvas.Measure(new Size(width, height));
canvas.Arrange(new Rect(new Size(width, height)));
RenderTargetBitmap renderBitmap = new RenderTargetBitmap(width, height, 96, 96, PixelFormats.Pbgra32);
renderBitmap.Render(canvas);
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(renderBitmap));
using (FileStream file = File.Create(path))
{
encoder.Save(file);
}
}
/// <summary>
/// Avi : 14 Feb ; Kraus RGA Project.
/// Export the canvas to the Images withe the file name.
/// used in the camera screen to capture the images.
/// </summary>
/// <param name="path">
/// String pathe of the images to be save with the image extension.
/// </param>
/// <param name="surface">
/// Canvas control to be converted in to image.
/// </param>
public static void CanvasExportToPng(Uri path, System.Windows.Controls.Canvas surface)
{
if (path == null)
{
return;
}
// Save current canvas transform
Transform transform = surface.LayoutTransform;
// reset current transform (in case it is scaled or rotated)
surface.LayoutTransform = null;
// Get the size of canvas
Size size = new Size(surface.ActualWidth, surface.ActualHeight);
// Measure and arrange the surface
// VERY IMPORTANT
surface.Measure(size);
surface.Arrange(new Rect(size));
// Create a render bitmap and push the surface to it
RenderTargetBitmap renderBitmap =
new RenderTargetBitmap(
(int)size.Width,
(int)size.Height,
96d,
96d,
PixelFormats.Pbgra32);
renderBitmap.Render(surface);
// Create a file stream for saving image
using (FileStream outStream = new FileStream(path.LocalPath, FileMode.Create))
{
// Use png encoder for our data
PngBitmapEncoder encoder = new PngBitmapEncoder();
// push the rendered bitmap to it
encoder.Frames.Add(BitmapFrame.Create(renderBitmap));
// save the data to the stream
encoder.Save(outStream);
}
// Restore previously saved layout
surface.LayoutTransform = transform;
}
public void GenRangeBrush()
{
//处理点集
for (int i = 0; i < drawObjects.Count; i++)
{
StruDrawObjDesc objdesc = drawObjects[i];
string[] ss = objdesc.strPoints.Split(' ');
int pointcount = ss.Length;
List <Point> points = new List <Point>();
Point pnt = new Point(0, 0);
for (int j = 0; j < pointcount; j++)
{
pnt = Point.Parse(ss[j]);
points.Add(pnt);
}
objdesc.listpnts = points;
}
//miny = dots.Min(p => p.location.X); maxy = dots.Max(p => p.location.X); //将经度换为X坐标, 纬度换为Y坐标
//minx = dots.Min(p => p.location.Y); maxx = dots.Max(p => p.location.Y);
miny = drawObjects.Min(p1 => p1.listpnts.Min(p2 => p2.X)); maxy = drawObjects.Max(p1 => p1.listpnts.Max(p2 => p2.X));
minx = drawObjects.Min(p1 => p1.listpnts.Min(p2 => p2.Y)); maxx = drawObjects.Max(p1 => p1.listpnts.Max(p2 => p2.Y));
double w = maxx - minx; double h = maxy - miny;
//minx = minx - w * 0.2; maxx = maxx + w * 0.2;
//miny = miny - h * 0.2; maxy = maxy + h * 0.2;
minx = minx - 0.01; maxx = maxx + 0.01; //改为扩展固定大小
miny = miny - 0.01; maxy = maxy + 0.01;
w = maxx - minx; h = maxy - miny;
//经纬换为屏幕坐标
int size = 1024;
double ww = w > h ? size : size * w / h;
double hh = w > h ? size * h / w : size;
double scalerad = size / Math.Max(w, h) / 10000;
Size canvSize = new Size(ww, hh);
for (int i = 0; i < drawObjects.Count; i++)
{
StruDrawObjDesc objdesc = drawObjects[i];
List <Point> lp = objdesc.listpnts;
PointCollection pc = new PointCollection();
int pointcount = lp.Count;
foreach (Point pp in lp)
{
Point tmp = new Point((pp.Y - minx) / w * canvSize.Width, (maxy - pp.X) / h * canvSize.Height); //重新赋与新的平面点位置, 注，纬度取反，仅适用北半球
pc.Add(tmp);
}
objdesc.pc = pc;
objdesc.listpnts = null;
}
//绘制
canv.Children.Clear();
canv.Children.Add(new Rectangle()
{
Width = canvSize.Width, Height = canvSize.Height, StrokeThickness = 10, Stroke = Brushes.Transparent
});
//生成geo
PathGeometry pg = new PathGeometry();
foreach (StruDrawObjDesc objdesc in drawObjects)
{
PathFigure pf = new PathFigure();
pg.Figures.Add(pf);
pf.Segments.Add(new PolyLineSegment());
pf.StartPoint = objdesc.pc[0];
(pf.Segments[0] as PolyLineSegment).Points = objdesc.pc;
}
for (int i = layerCount - 1; i >= 0; i--)
{
Path path = new Path();
path.Data = pg;
path.Stroke = brush;
path.StrokeStartLineCap = path.StrokeEndLineCap = PenLineCap.Round;
path.StrokeLineJoin = PenLineJoin.Round;
path.StrokeThickness = rad * scalerad * (i + 1) / layerCount;
//path.Opacity = ((1.0f*layerCount - i ) / layerCount);
path.Fill = Brushes.Transparent;
path.Effect = new BlurEffect()
{
Radius = blueRadius * scalerad
};
canv.Children.Add(path);
}
canv.Effect = new BlurEffect()
{
Radius = Math.Max(canvSize.Width, canvSize.Height) / blurFactor
};
RangeBrush = new VisualBrush();
RangeBrush.Visual = canv;
canv.Measure(canvSize);
canv.Arrange(new System.Windows.Rect(0, 0, canvSize.Width, canvSize.Height));
canv.Measure(canvSize);
canv.Arrange(new System.Windows.Rect(0, 0, canvSize.Width, canvSize.Height));
}