add 3rd party folders back

3rd/omt-examples/C#/omtgraphicsexample/Program.cs

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+using libomtnet;
+using SkiaSharp;
+using System.Runtime.InteropServices;
+
+/*
+ * OMT Graphics Example
+ * 
+ * This example generates a horizontal ticker graphic and sends it via an OMT Sender.
+ * 
+ * This demonstrates the alpha channel functionality built into Open Media Transport.
+ * 
+ */
+
+namespace omtgraphicsexample
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("OMT Graphics Example");
+
+            //Create the graphics format we will be sending, in this example this is a standard 1080p video.
+            SKImageInfo imageInfo = new SKImageInfo(1920, 1080, SKColorType.Bgra8888, SKAlphaType.Unpremul);
+
+            //This is the surface we will be drawing to to create out frame
+            SKSurface image = SKSurface.Create(imageInfo);
+
+            //Canvas contains all the drawing functions we will be utilising
+            SKCanvas canvas = image.Canvas;
+
+            //Define a rectangle for our ticker
+            SKRect rect = new SKRect(0, 960, 1920, 1080);
+            SKRoundRect roundRect = new SKRoundRect(rect, 8);
+
+            //Create a simple gradient background for our ticker
+            SKShader gradient = SKShader.CreateLinearGradient(new SKPoint(rect.Left, rect.Top), new SKPoint(rect.Right, rect.Bottom), new[] {
+                    new SKColor(0, 19, 69, 192),   // semi-transparent deep blue
+                    new SKColor(0, 89, 254, 192)  // semi-transparent light blue
+                }, null, SKShaderTileMode.Clamp);
+            SKPaint gradientPaint = new SKPaint() { Shader = gradient };
+
+            //Create the text formatting to use
+            SKFont textFont = new SKFont(SKTypeface.FromFamilyName("Sans Serif", SKFontStyle.Bold), 48);
+            SKPaint textPaint = new SKPaint() { IsAntialias = true, Color = SKColors.White };
+
+            //Position text in the middle of the gradient rectangle
+            SKFontMetrics fontMetrics = new SKFontMetrics();
+            textFont.GetFontMetrics(out fontMetrics);
+            SKPoint textPosition =new SKPoint(rect.Right, rect.Top + ((rect.Height - (fontMetrics.Ascent + fontMetrics.Descent)) / 2f));
+
+            //This is the text we will be sending along with an estimate of its width to know when to repeat.
+            string tickerText = "This is an example of text rendering in SkiaSharp that is sent over Open Media Transport!";
+            float tickerTextWidth = textFont.MeasureText(tickerText);
+
+            //Create our sender
+            using (OMTSend send = new OMTSend("Graphics", OMTQuality.Default))
+            {
+
+                //Create the media frame that contains the final graphic ready for sending
+                OMTMediaFrame frame = new OMTMediaFrame();
+                frame.Type = OMTFrameType.Video;
+                frame.Codec = (int)OMTCodec.BGRA;
+                frame.Width = imageInfo.Width;
+                frame.Height = imageInfo.Height;
+                frame.FrameRate = 59.94F;
+                frame.Flags = OMTVideoFlags.Alpha; //Set premultiplied here also if necessary
+                frame.AspectRatio = (float)imageInfo.Width / (float)imageInfo.Height;
+                frame.ColorSpace = OMTColorSpace.BT709;
+                frame.Stride = imageInfo.Width * 4;
+                frame.DataLength = frame.Stride * frame.Height;
+                frame.Data = Marshal.AllocHGlobal(frame.DataLength);
+                frame.Timestamp = -1; //Important, informs OMT to automatically pace our frames to the frame rate.
+
+                Console.WriteLine("Sending graphics on: \"" + send.Address + "\"");
+                Console.WriteLine("");
+
+                while (true)
+                {
+                    canvas.Clear(); //Clear our canvas so it is fully transparent
+                    canvas.DrawRoundRect(roundRect, gradientPaint);
+                    canvas.DrawText(tickerText, textPosition, textFont, textPaint);                       
+
+                    if (image.ReadPixels(imageInfo, frame.Data, frame.Stride, 0, 0))
+                    {
+                        send.Send(frame);
+                        Console.Write(".");
+                    } else
+                    {
+                        Console.WriteLine("Failed to read pixels from SkiaSharp Surface, exiting....");
+                        break;
+                    }
+
+                    //Update text position to scroll along the screen
+                    textPosition.X -= 4;
+                    if (textPosition.X < -tickerTextWidth) { textPosition.X = rect.Width; }
+
+                }
+            }
+
+        }
+    }
+}