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Is there any way to grab the frames from media element like a video without feeling any delay? - WPF

I have to show the frames from a media element in an Image control like a video. I have tried to grab continues frames from media element using a timer and bind that bitmap to Image source. But when setting the scale as 1, it seems like frames are grabbing very slowly. And when reduce the scale to 0.3 or below, the grabbing is working very fast. but the quality of frame is reducing.
Is there any way to solve this?
In short, I want to display the frames from media element to an Image source without any delay and with original quality.
<MediaElement x:Name="MediaEL" Volume="0" ScrubbingEnabled="True" SnapsToDevicePixels="True" MediaOpened="MediaEL_MediaOpened" LoadedBehavior="Manual" MediaEnded="MediaEL_MediaEnded" MediaFailed="MediaEL_MediaFailed">
</MediaElement>
<Image Name="ImageViewerMediaEL" />
ScreenShotimer = new DispatcherTimer();
ScreenShotimer.Interval = TimeSpan.FromMilliseconds(35);//35//
ScreenShotimer.Tick += ScreenShotimer_Tick;
public Bitmap TakeScreenshot(MediaElement medElement, double scale)
{
Bitmap screenBitmap = null;
double actualHeight = medElement.NaturalVideoHeight;
double actualWidth = medElement.NaturalVideoWidth;
double renderHeight = actualHeight * scale;
double renderWidth = actualWidth * scale;
if ((int)renderWidth > 0 && (int)renderHeight > 0)
{
RenderTargetBitmap renderTarget = new RenderTargetBitmap((int)renderWidth,
(int)renderHeight, 96, 96, PixelFormats.Default);
VisualBrush sourceBrush = new VisualBrush(medElement);
DrawingVisual drawingVisual = new DrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
using (drawingContext)
{
drawingContext.PushTransform(new ScaleTransform(scale, scale));
drawingContext.DrawRectangle(sourceBrush, null, new Rect(new System.Windows.Point(0, 0),
new System.Windows.Point(actualWidth, actualHeight)));
}
renderTarget.Render(drawingVisual);
MemoryStream stream = new MemoryStream();
BitmapEncoder encoder = new BmpBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(renderTarget));
encoder.Save(stream);
screenBitmap = new Bitmap(stream);
}
return screenBitmap;
}

Using a WinForms Bitmap in a WPF application doesn't seem to be necessary.
Reuse a single instance of a RenderTargetBitmap that is only created when necessary and assigned to the Source property of the Image element.
As well, reuse the DrawingVisual and draw a rectangle with a VisualBrush only when size changes.
private readonly DrawingVisual visual = new DrawingVisual();
private RenderTargetBitmap bitmap;
...
private void OnTimerTick(object sender, EventArgs e)
{
var width = MediaEL.NaturalVideoWidth;
var height = MediaEL.NaturalVideoHeight;
if (width > 0 && height > 0)
{
if (bitmap == null ||
bitmap.PixelWidth != width ||
bitmap.PixelHeight != height)
{
using (var dc = visual.RenderOpen())
{
dc.DrawRectangle(
new VisualBrush(MediaEL), null,
new Rect(0, 0, width, height));
}
bitmap = new RenderTargetBitmap(
width, height, 96, 96, PixelFormats.Default);
ImageViewerMediaEL.Source = bitmap;
}
bitmap.Render(visual);
}
}
The code above works fine for me with Microsoft's Wildlife.wmv and 35 ms timer interval.

RenderTargetBitmap low image quality issue

I try to generate 300 dpi image using RenderTargetBitmap method.
When I try to use RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(315, 195, 300, 300, PixelFormats.Pbgra32);
Image gets extremly big.
How to fix it?
RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(315, 195, 96, 96, PixelFormats.Pbgra32);
renderTargetBitmap.Render(gridCard);
PngBitmapEncoder pngImage = new PngBitmapEncoder();
pngImage.Frames.Add(BitmapFrame.Create(renderTargetBitmap));
using (Stream fileStream = File.Create(path))
{
pngImage.Save(fileStream);
}

I need to scale the bitmap's size by the desired DPI (i.e. 300) divided by the default DPI (i.e. 96).
double w = 315;
double h = 195;
double dpi = 300;
double scale = dpi / 96;
RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(
(int)(w * scale), (int)(h * scale), dpi, dpi, PixelFormats.Pbgra32);
UPDATE #1 Full solution (to print WPF Control is proxi-card to special printer MAGiCARD Enduro 3E)
private void BtnPrint_Click(object sender, RoutedEventArgs e)
{
try
{
var size = GetElementPixelSize(gridCard);
double w = size.Width;
double h = size.Height;
double dpiScale = 300.0 / 99.9;
double dpiX = 300.0;
double dpiY = 300.0;
RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(Convert.ToInt32((w) * dpiScale), Convert.ToInt32((h) * dpiScale), dpiX, dpiY, PixelFormats.Pbgra32);
renderTargetBitmap.Render(gridCard);
PngBitmapEncoder pngImage = new PngBitmapEncoder();
pngImage.Frames.Add(BitmapFrame.Create(renderTargetBitmap));
var biRotated = new BitmapImage();
using (Stream fileStream = new MemoryStream())
{
pngImage.Save(fileStream);
fileStream.Seek(0, SeekOrigin.Begin);
biRotated.BeginInit();
biRotated.CacheOption = BitmapCacheOption.OnLoad;
biRotated.StreamSource = fileStream;
// biRotated.Rotation = Rotation.Rotate90; // if you need it
biRotated.EndInit();
}
var vis = new DrawingVisual();
var dc = vis.RenderOpen();
dc.DrawImage(biRotated, new Rect { Width = biRotated.Width, Height = biRotated.Height });
dc.Close();
var pdialog = new System.Windows.Controls.PrintDialog();
if (pdialog.ShowDialog() == true)
{
pdialog.PrintVisual(vis, "Proxy-card");
}
}
catch (Exception ex)
{
System.Windows.MessageBox.Show("Print error " + ex.Message);
}
}
// https://stackoverflow.com/questions/3286175/how-do-i-convert-a-wpf-size-to-physical-pixels
public Size GetElementPixelSize(UIElement element)
{
Matrix transformToDevice;
var source = PresentationSource.FromVisual(element);
if (source != null)
transformToDevice = source.CompositionTarget.TransformToDevice;
else
{
// IntPtr hWnd = source.Handle;
using (var source1 = new HwndSource(new HwndSourceParameters()))
{
transformToDevice = source1.CompositionTarget.TransformToDevice;
}
}
if (element.DesiredSize == new Size())
element.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
return (Size)transformToDevice.Transform((Vector)element.DesiredSize);
}

Export WPF ScrollViewer content as separate PNGs

In my WPF application I have a ScrollViewer which is dynamically populated by DataBinding and the use of a UserControl. Imagine that my UserControl is something simple that only contains a label, and the value displayed in the label comes from a list. So when I run the application it looks like below:
As you can see there are multiple instances of the UserControl each with a different value that is dynamically populated. My goal is to export each of the UserControls as a separate PNG. My EXPORT PNG button click should do this.
So I looked around and found this example which works fine for exporting the entire content of the ScorllViewer.
So I tried modifying it to achieve my goal, and I do get it to work to a certain extent, but not quite what I want.
Here's my code:
private void ExportPNG()
{
var dir = Directory.GetCurrentDirectory();
var file = "ITEM_{0}.PNG";
var height = 100.0; // Height of the UserControl
var width = mainSV.ActualWidth;
for (int i = 1; i <= ItemList.Count; i++)
{
var path = System.IO.Path.Combine(dir, string.Format(file, i));
Size size = new Size(width, height);
UIElement element = mainSV.Content as UIElement;
element.Measure(size);
element.Arrange(new Rect(new Point(0, 0), size));
RenderTargetBitmap renderTarget = new RenderTargetBitmap((int)width, (int)height, 96, 96, PixelFormats.Pbgra32);
VisualBrush sourceBrush = new VisualBrush(element);
DrawingVisual drawingVisual = new DrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
using (drawingContext)
{
drawingContext.DrawRectangle(sourceBrush, null, new Rect(new Point(0, 0), new Point(width, height)));
}
renderTarget.Render(drawingVisual);
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(renderTarget));
using (FileStream stream = new FileStream(path, FileMode.Create, FileAccess.Write))
{
encoder.Save(stream);
}
}
}
Now this exports 5 PNGs (when my list has 5 items), bu they all contain the image of the first element:
And I figure the problem is likely where I do the drawingContext.DrawRectangle() because my rectanble coordinates are always the same. So I tried changing it to the following, which I thought should work, but for some reason it just generates one PNG with the first UserControl and 4 empty PNGs.
using (drawingContext)
{
drawingContext.DrawRectangle(sourceBrush, null, new Rect(new Point(0, (i-1) * height), new Point(width, height + ((i-1) * height))));
}
And the result:
What am I doing wrong here?
If you would like to run the code please find it here.

Please check below two methods. I tested it and it is working very well.
1. First, find children from you Items controls
2. Convert them to PNGs.
private void ExportPNG()
{
var dir = Directory.GetCurrentDirectory();
var file = "ITEM_{0}.PNG";
var height = 100.0;
var width = 100.0;
var children = GetChildrenOfType<UCDisplayItem>(itC);
foreach (var item in children)
{
var path = System.IO.Path.Combine(dir, string.Format(file, DateTime.Now.Ticks));
Size size = new Size(width, height);
UIElement element = item as UIElement;
element.Measure(size);
element.Arrange(new Rect(new Point(0, 0), size));
RenderTargetBitmap renderTarget = new RenderTargetBitmap((int)width, (int)height, 96, 96, PixelFormats.Pbgra32);
VisualBrush sourceBrush = new VisualBrush(element);
DrawingVisual drawingVisual = new DrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
using (drawingContext)
{
drawingContext.DrawRectangle(sourceBrush, null, new Rect(new Point(0, 0), new Point(width, height)));
//drawingContext.DrawRectangle(sourceBrush, null, new Rect(new Point(0, (i - 1) * height), new Point(width, height + ((i - 1) * height))));
}
renderTarget.Render(drawingVisual);
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(renderTarget));
using (FileStream stream = new FileStream(path, FileMode.Create, FileAccess.Write))
{
encoder.Save(stream);
}
}
}
public List<T> GetChildrenOfType<T>( DependencyObject depObj)
where T : DependencyObject
{
var result = new List<T>();
if (depObj == null) return null;
var queue = new Queue<DependencyObject>();
queue.Enqueue(depObj);
while (queue.Count > 0)
{
var currentElement = queue.Dequeue();
var childrenCount = VisualTreeHelper.GetChildrenCount(currentElement);
for (var i = 0; i < childrenCount; i++)
{
var child = VisualTreeHelper.GetChild(currentElement, i);
if (child is T)
result.Add(child as T);
queue.Enqueue(child);
}
}
return result;
}
RESULT

Save image of whole ListView

I have the next code:
private static void SnapShotPNG(ListView source, string destination, int zoom)
{
try
{
double actualHeight = source.ActualHeight;
double actualWidth = source.ActualWidth;
double renderHeight = actualHeight * zoom;
double renderWidth = actualWidth * zoom;
RenderTargetBitmap renderTarget = new RenderTargetBitmap((int)renderWidth, (int)renderHeight, 96, 96, PixelFormats.Pbgra32);
VisualBrush sourceBrush = new VisualBrush(source);
DrawingVisual drawingVisual = new DrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
using (drawingContext)
{
drawingContext.PushTransform(new ScaleTransform(zoom, zoom));
drawingContext.DrawRectangle(sourceBrush, null, new Rect(new Point(0, 0), new Point(actualWidth, actualHeight)));
}
renderTarget.Render(drawingVisual);
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(renderTarget));
using (FileStream stream = new FileStream(destination, FileMode.Create, FileAccess.Write))
{
encoder.Save(stream);
}
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
It saves a given source to an image, it works fine. But it save only visible part of control (in my case, only visible items of ListView). How can i save snapshot of whole items in ListView?

I've changed your first two lines, by adding Arrange and Measure methods, which allow the control to render in memory. I've assumed, that your control doesn't scroll horizontally and kept the width as it was, since otherwise it will use minimal width required for its largest child. You can change it.
Here is your method.
private static void SnapShotPNG(ListView source, string destination, int zoom)
{
try
{
double actualWidth = source.ActualWidth;
source.Measure(new Size(source.ActualWidth, Double.PositiveInfinity));
source.Arrange(new Rect(0, 0, actualWidth, source.DesiredSize.Height));
double actualHeight = source.ActualHeight;
double renderHeight = actualHeight * zoom;
double renderWidth = actualWidth * zoom;
RenderTargetBitmap renderTarget = new RenderTargetBitmap((int)renderWidth, (int)renderHeight, 96, 96, PixelFormats.Pbgra32);
VisualBrush sourceBrush = new VisualBrush(source);
DrawingVisual drawingVisual = new DrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
using (drawingContext)
{
drawingContext.PushTransform(new ScaleTransform(zoom, zoom));
drawingContext.DrawRectangle(sourceBrush, null, new Rect(new Point(0, 0), new Point(actualWidth, actualHeight)));
}
renderTarget.Render(drawingVisual);
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(renderTarget));
using (FileStream stream = new FileStream(destination, FileMode.Create, FileAccess.Write))
{
encoder.Save(stream);
}
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}

How to save Geometry as image?

How to save Geometry as image?
For example i have List<Geometry>.
I want it to be as follows:
for (int i = 0; i < GeometryList.Count; i++)
{
Pen TestPen = new Pen(Brushes.Black, 1);
GeometryDrawing TestDrawing = new GeometryDrawing(Brushes.Black, TestPen, TestGeometry);
Bitmap b = TestDrawing as Bitmap;
b.Save(System.AppDomain.CurrentDomain.BaseDirectory + i + ".png", ImageFormat.Png);
}
Update:
The code I wrote a few hours ago:
private void CreateFontMap(string PathTofont)
{
GlyphTypeface font = new GlyphTypeface(new Uri(PathTofont));
List<ushort> fontNum = new List<ushort>();
foreach (KeyValuePair<int, ushort> kvp in font.CharacterToGlyphMap)
{
fontNum.Add(kvp.Value);
}
if (fontNum.Count > 0)
{
int mapWidth = 50 * 20;
int mapHeight = 50 * (getRowNum(fontNum.Count + 1) + 1);
Bitmap b = new Bitmap(mapWidth, mapHeight);
Graphics g = Graphics.FromImage(b);
System.Windows.Media.Pen glyphPen = new System.Windows.Media.Pen(System.Windows.Media.Brushes.Red, 1);
Geometry glyphGeometry;
for (int i = 0; i < fontNum.Count; i++)
{
glyphGeometry = font.GetGlyphOutline(fontNum[i], 50, 1);
RenderTargetBitmap bmp = new RenderTargetBitmap(50, 50, 96, 96, PixelFormats.Pbgra32);
DrawingVisual viz = new DrawingVisual();
DrawingContext dc = viz.RenderOpen();
dc.DrawGeometry(System.Windows.Media.Brushes.Red, null, glyphGeometry);
dc.Close();
bmp.Render(viz);
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bmp));
MemoryStream myStream = new MemoryStream();
encoder.Save(myStream);
int rowNum = (getRowNum(i));
g.DrawImage(System.Drawing.Bitmap.FromStream(myStream), new PointF((i - rowNum * 20) * 50, rowNum * 50));
}
g.Dispose();
b.Save(System.AppDomain.CurrentDomain.BaseDirectory + "map.png", ImageFormat.Png);
b.Dispose();
}
}
private int getRowNum(int p)
{
return p / 20;
}
But instead of , I get Img2.
Update 2:
I changed this:
DrawingVisual viz = new DrawingVisual();
DrawingContext dc = viz.RenderOpen();
dc.DrawGeometry(System.Windows.Media.Brushes.Red, null, glyphGeometry);
dc.Close();
to:
DrawingVisual viz = new DrawingVisual();
DrawingContext dc = viz.RenderOpen();
dc.DrawImage(geometryImage, new Rect(0, 0, 50, 50));
dc.Close();
and added:
glyphDrawing = new GeometryDrawing(System.Windows.Media.Brushes.Black, glyphPen, glyphGeometry);
DrawingImage geometryImage = new DrawingImage(glyphDrawing);
geometryImage.Freeze();
img1.Source = geometryImage;
And all working.

For anyone who is wanting to render geometry centered in a fixed size, this is the code to do it:
const int TargetSize = 14;
private static void Save(Geometry geometry, string fileName)
{
var rect = geometry.GetRenderBounds(new Pen(Brushes.Black, 0));
var bigger = rect.Width > rect.Height ? rect.Width : rect.Height;
var scale = TargetSize / bigger;
Geometry scaledGeometry = Geometry.Combine(geometry, geometry, GeometryCombineMode.Intersect, new ScaleTransform(scale, scale));
rect = scaledGeometry.GetRenderBounds(new Pen(Brushes.Black, 0));
Geometry transformedGeometry = Geometry.Combine(scaledGeometry, scaledGeometry, GeometryCombineMode.Intersect, new TranslateTransform(((TargetSize - rect.Width) / 2) - rect.Left, ((TargetSize - rect.Height) / 2) - rect.Top));
RenderTargetBitmap bmp = new RenderTargetBitmap(TargetSize, TargetSize, // Size
96, 96, // DPI
PixelFormats.Pbgra32);
DrawingVisual viz = new DrawingVisual();
using (DrawingContext dc = viz.RenderOpen())
{
dc.DrawGeometry(Brushes.Black, null, transformedGeometry);
}
bmp.Render(viz);
PngBitmapEncoder pngEncoder = new PngBitmapEncoder();
pngEncoder.Frames.Add(BitmapFrame.Create(bmp));
using (FileStream file = new FileStream(fileName, FileMode.Create))
pngEncoder.Save(file);
}

// Create the bitmap we'll render to
RenderTargetBitmap bmp =
new RenderTargetBitmap(100, 100, // Size
96, 96, // DPI
PixelFormats.Pbgra32);
// Create a list of random circle geometries
List<Geometry> geoList = new List<Geometry>();
Random rand = new Random();
for (int i=0; i<10; i++)
{
double radius = rand.Next(5, 10);
Point center = new Point(rand.Next(25, 75), rand.Next(25,75));
geoList.Add(new EllipseGeometry(center, radius, radius));
}
// The light-weight visual element that will draw the geometries
DrawingVisual viz = new DrawingVisual();
using (DrawingContext dc = viz.RenderOpen())
{ // The DC lets us draw to the DrawingVisual directly
foreach (var g in geoList)
dc.DrawGeometry(Brushes.Red, null, g);
} // the DC is closed as it falls out of the using statement
// draw the visual on the bitmap
bmp.Render(viz);
// instantiate an encoder to save the file
PngBitmapEncoder pngEncoder = new PngBitmapEncoder();
// add this bitmap to the encoders set of frames
pngEncoder.Frames.Add(BitmapFrame.Create(bmp));
// save the bitmap as an .png file
using (FileStream file = new FileStream("Spots.png", FileMode.Create))
pngEncoder.Save(file);
Based on your comments to the section above, it looks like you're trying to create a table of glyphs for a font and save it out to an image file. Here's how you accomplish this:
// I'm generating the glyphs differently for testing.
// I tested with fontName="Arial"
Typeface face = new Typeface(fontName);
GlyphTypeface font;
if (!face.TryGetGlyphTypeface(out font))
return; // bail if something goes wrong
int ColumnCount = 10;
int MaxDrawCount = 30; // use int.MaxValue to draw them all
double fontSize = 50d;
// the height of each cell has to include over/underhanging glyphs
Size cellSize = new Size(fontSize, fontSize * font.Height);
var Glyphs = from glyphIndex in font.CharacterToGlyphMap.Values
select font.GetGlyphOutline(glyphIndex, fontSize, 1d);
// now create the visual we'll draw them to
DrawingVisual viz = new DrawingVisual();
int drawCount = -1;
using (DrawingContext dc = viz.RenderOpen())
{
foreach (var g in Glyphs)
{
drawCount++;
if (drawCount >= MaxDrawCount)
break; // don't draw more than you want
if (g.IsEmpty()) continue; // don't draw the blank ones
// center horizontally in the cell
double xOffset = (drawCount % ColumnCount) * cellSize.Width + cellSize.Width / 2d - g.Bounds.Width / 2d;
// place the character on the baseline of the cell
double yOffset = (drawCount / ColumnCount) * cellSize.Height + fontSize * font.Baseline;
dc.PushTransform(new TranslateTransform(xOffset, yOffset));
dc.DrawGeometry(Brushes.Red, null, g);
dc.Pop(); // get rid of the transform
}
}
int RowCount = drawCount / ColumnCount;
if (drawCount % ColumnCount != 0)
RowCount++; // to include partial rows
int bitWidth = (int)Math.Ceiling(cellSize.Width * ColumnCount);
int bitHeight = (int)Math.Ceiling(cellSize.Height * RowCount);
RenderTargetBitmap bmp = new RenderTargetBitmap(
bitWidth, bitHeight,
96, 96,
PixelFormats.Pbgra32);
bmp.Render(viz);
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bmp));
using (FileStream file = new FileStream("FontTable.png", FileMode.Create))
encoder.Save(file);

I use this:
private void GenerateFontMap(string PathTofont, int GlyphsPerRow, int WidthAndHeight)
{
GlyphTypeface font = new GlyphTypeface(new Uri(PathTofont));
List<ushort> fontNum = new List<ushort>();
foreach (KeyValuePair<int, ushort> kvp in font.CharacterToGlyphMap)
{
fontNum.Add(kvp.Value);
}
if (fontNum.Count > 0)
{
int mapWidth = WidthAndHeight * GlyphsPerRow;
int mapHeight = WidthAndHeight * ((fontNum.Count + 1) / GlyphsPerRow + 1);
Bitmap b = new Bitmap(mapWidth, mapHeight);
Graphics g = Graphics.FromImage(b);
System.Windows.Media.Pen glyphPen = new System.Windows.Media.Pen(System.Windows.Media.Brushes.Black, 1);
Geometry glyphGeometry;
GeometryDrawing glyphDrawing;
PngBitmapEncoder encoder;
RenderTargetBitmap bmp;
DrawingVisual viz;
for (int i = 0; i < fontNum.Count; i++)
{
glyphGeometry = font.GetGlyphOutline(fontNum[i], WidthAndHeight, 1);
glyphDrawing = new GeometryDrawing(System.Windows.Media.Brushes.Black, glyphPen, glyphGeometry);
DrawingImage geometryImage = new DrawingImage(glyphDrawing);
geometryImage.Freeze();
viz = new DrawingVisual();
DrawingContext dc = viz.RenderOpen();
dc.DrawImage(geometryImage, new Rect(0, 0, geometryImage.Width, geometryImage.Height));
dc.Close();
bmp = new RenderTargetBitmap(WidthAndHeight, WidthAndHeight, 96, 96, PixelFormats.Pbgra32);
bmp.Render(viz);
encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bmp));
MemoryStream myStream = new MemoryStream();
encoder.Save(myStream);
g.DrawImage(System.Drawing.Bitmap.FromStream(myStream), new PointF((i - (i / GlyphsPerRow) * GlyphsPerRow) * WidthAndHeight, i / GlyphsPerRow * WidthAndHeight));
}
g.Dispose();
b.Save("map.png", ImageFormat.Png);
b.Dispose();
}
}