[03_RoyalGallery/DotNet-PrinterController]

Created it.

03_RoyalGallery/DotNet-PrinterController/PrinterController/App.config

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+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
+    </startup>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Interactive.Async" publicKeyToken="94bc3704cddfc263" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-3.0.3000.0" newVersion="3.0.3000.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>

03_RoyalGallery/DotNet-PrinterController/PrinterController/Form1.Designer.cs

@@ -0,0 +1,102 @@
+namespace TestPrinter
+{
+    partial class Form1
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
+            this.printer_preview = new System.Windows.Forms.Button();
+            this.printer_setup = new System.Windows.Forms.Button();
+            this.pictureBox = new System.Windows.Forms.PictureBox();
+            this.comboBox1 = new System.Windows.Forms.ComboBox();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox)).BeginInit();
+            this.SuspendLayout();
+            // 
+            // printer_preview
+            // 
+            this.printer_preview.Location = new System.Drawing.Point(461, 442);
+            this.printer_preview.Name = "printer_preview";
+            this.printer_preview.Size = new System.Drawing.Size(166, 34);
+            this.printer_preview.TabIndex = 1;
+            this.printer_preview.Text = "預覽列印";
+            this.printer_preview.UseVisualStyleBackColor = true;
+            this.printer_preview.Click += new System.EventHandler(this.printer_preview_Click);
+            // 
+            // printer_setup
+            // 
+            this.printer_setup.Location = new System.Drawing.Point(180, 442);
+            this.printer_setup.Name = "printer_setup";
+            this.printer_setup.Size = new System.Drawing.Size(135, 34);
+            this.printer_setup.TabIndex = 2;
+            this.printer_setup.Text = "印表機設定";
+            this.printer_setup.UseVisualStyleBackColor = true;
+            this.printer_setup.Click += new System.EventHandler(this.printer_setup_Click);
+            // 
+            // pictureBox
+            // 
+            this.pictureBox.BackgroundImageLayout = System.Windows.Forms.ImageLayout.None;
+            this.pictureBox.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox.Image")));
+            this.pictureBox.Location = new System.Drawing.Point(0, 1);
+            this.pictureBox.Name = "pictureBox";
+            this.pictureBox.Size = new System.Drawing.Size(799, 484);
+            this.pictureBox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
+            this.pictureBox.TabIndex = 3;
+            this.pictureBox.TabStop = false;
+            // 
+            // comboBox1
+            // 
+            this.comboBox1.FormattingEnabled = true;
+            this.comboBox1.Location = new System.Drawing.Point(461, 415);
+            this.comboBox1.Name = "comboBox1";
+            this.comboBox1.Size = new System.Drawing.Size(166, 21);
+            this.comboBox1.TabIndex = 4;
+            this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.printer_scale_mode_Changed);
+            // 
+            // Form1
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(800, 488);
+            this.Controls.Add(this.comboBox1);
+            this.Controls.Add(this.printer_setup);
+            this.Controls.Add(this.printer_preview);
+            this.Controls.Add(this.pictureBox);
+            this.Name = "Form1";
+            this.Text = "Form1";
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox)).EndInit();
+            this.ResumeLayout(false);
+
+        }
+
+        #endregion
+        private System.Windows.Forms.Button printer_preview;
+        private System.Windows.Forms.Button printer_setup;
+        private System.Windows.Forms.PictureBox pictureBox;
+        private System.Windows.Forms.ComboBox comboBox1;
+    }
+}
+

03_RoyalGallery/DotNet-PrinterController/PrinterController/Form1.cs

@@ -0,0 +1,406 @@
+using Grpc.Core;
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Printing;
+using System.IO;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using UltraCombos.Utility;
+using grpc = global::Grpc.Core;
+using Newtonsoft.Json;
+
+namespace TestPrinter
+{
+    public partial class Form1 : Form
+    {
+        private PrintDocument pdDocument = new PrintDocument();
+        private PageSetupDialog setupDlg = new PageSetupDialog();        
+        private PrintPreviewDialog previewDlg = new PrintPreviewDialog();
+        private PageSettings pageSettings;
+
+        private bool is_preview = false;
+        private bool is_pressed_ok = false;
+        private bool is_loaded_ok = false;
+
+        private string path = @"printer_settings.json";
+        //private System.Drawing.Image testing_image;
+        PrinterService service;
+
+        public enum ScaleMode
+        {
+            ScaleFit = 0,
+            ScaleFill,
+            ScaleFullFit,
+            ScaleFullFill,
+            ScaleFullPageFit,
+            ScaleFullPageFill,
+            MaxNum,
+        }
+
+        public Form1()
+        {
+            InitializeComponent();
+
+            for (int i = 0; i < (int)ScaleMode.MaxNum; ++i)
+            {
+                comboBox1.Items.Add((ScaleMode)(i));
+            }
+
+            comboBox1.SelectedIndex = 0;
+
+            pdDocument.DefaultPageSettings.Landscape = true;
+            pdDocument.PrinterSettings.DefaultPageSettings.Landscape = true;
+
+
+            pdDocument.PrintPage += new PrintPageEventHandler(OnPrintPage);
+            PaperSize papersize = null;
+            foreach (PaperSize size in pdDocument.PrinterSettings.PaperSizes)
+            {
+                if(size.PaperName.StartsWith("A4"))
+                {
+                    papersize = size;
+                    break;
+                }
+            }
+            if (papersize != null)
+            {
+                pdDocument.DefaultPageSettings.PaperSize = papersize;
+                pdDocument.PrinterSettings.DefaultPageSettings.PaperSize = papersize;
+                var hard_area = pdDocument.PrinterSettings.DefaultPageSettings.PrintableArea;
+                
+                Margins margins = new Margins(
+                    (int)Math.Round(hard_area.X), 
+                    (int)Math.Round(hard_area.Y),
+                    (int)Math.Round(papersize.Width - (hard_area.X + hard_area.Width)),
+                    (int)Math.Round(papersize.Height - (hard_area.Y + hard_area.Height))
+                );
+                pdDocument.DefaultPageSettings.Margins = margins;
+                
+            }
+
+            pageSettings = pdDocument.DefaultPageSettings.Clone() as PageSettings;
+            PrintSettings s = Utils.LoadPrintSettings(path, pageSettings);
+            is_loaded_ok = s != null;
+            if (is_loaded_ok)
+            {
+                pdDocument.DefaultPageSettings = pageSettings.Clone() as PageSettings;
+                comboBox1.SelectedItem = s.ScaleMode;
+            }
+
+            var options = new List<Grpc.Core.ChannelOption> { new Grpc.Core.ChannelOption(ChannelOptions.MaxReceiveMessageLength, int.MaxValue) };
+            var services = new ServerServiceDefinition[] { Printer.BindService(new PrinterImpl(print_impl)) };
+            service = new PrinterService();
+            service.StartServer(options, services, 54578);
+
+        }
+
+        RectangleF getPrintableArea()
+        {
+            var rect = pdDocument.DefaultPageSettings.PrintableArea;
+            if (pdDocument.DefaultPageSettings.Landscape)
+            {
+                float tmp = rect.X;
+                rect.X = rect.Y;
+                rect.Y = tmp;
+                tmp = rect.Width;
+                rect.Width = rect.Height;
+                rect.Height = tmp;
+            }
+            return rect;
+        }
+
+        RectangleF getFullPageArea()
+        {
+            var rect = new RectangleF(0, 0, pdDocument.DefaultPageSettings.PaperSize.Width, pdDocument.DefaultPageSettings.PaperSize.Height);
+            if (pdDocument.DefaultPageSettings.Landscape)
+            {
+                float tmp = rect.Width;
+                rect.Width = rect.Height;
+                rect.Height = tmp;
+            }
+            return rect;
+        }
+
+        private void OnPrintPage(object sender, PrintPageEventArgs e)
+        {
+
+            Console.WriteLine("OnPrintPage()");
+            float dpiX = (float)e.PageSettings.PrinterSettings.DefaultPageSettings.PrinterResolution.X;
+            float dpiY = (float)e.PageSettings.PrinterSettings.DefaultPageSettings.PrinterResolution.Y;
+            e.Graphics.PageUnit = GraphicsUnit.Pixel;
+
+            e.Graphics.ScaleTransform(dpiX*0.01f, dpiY*0.01f);
+            var printable_area = getPrintableArea();
+            RectangleF hot_area;
+
+            switch (comboBox1.SelectedItem)
+            {
+            default:
+            case ScaleMode.ScaleFit:
+            case ScaleMode.ScaleFill:
+                hot_area = RectangleF.Intersect(e.MarginBounds, printable_area);
+                break;
+
+            case ScaleMode.ScaleFullFit:
+            case ScaleMode.ScaleFullFill:
+                hot_area = printable_area;
+                break;
+
+            case ScaleMode.ScaleFullPageFit:
+            case ScaleMode.ScaleFullPageFill:
+                hot_area = getFullPageArea();
+                break;
+            }
+
+            {
+                var state = e.Graphics.Save();
+                e.Graphics.TranslateTransform(hot_area.X, hot_area.Y);
+
+                if(is_preview == false)
+                    e.Graphics.TranslateTransform(-printable_area.X, -printable_area.Y);
+
+                var image = pictureBox.Image;
+
+                float area_aspect = hot_area.Width / hot_area.Height;
+                float img_aspect = (float)image.Width / image.Height;
+                float x, y, w, h;
+
+                switch (comboBox1.SelectedItem)
+                {
+                default:
+                case ScaleMode.ScaleFit:
+                case ScaleMode.ScaleFullFit:
+                case ScaleMode.ScaleFullPageFit:
+                    if (img_aspect > area_aspect)
+                    {
+                        w = hot_area.Width;
+                        h = w / img_aspect;
+                    }
+                    else
+                    {
+                        h = hot_area.Height;
+                        w = h * img_aspect;
+                    }
+                    break;
+
+                case ScaleMode.ScaleFill:
+                case ScaleMode.ScaleFullFill:
+                case ScaleMode.ScaleFullPageFill:
+                    w = hot_area.Width;
+                    h = hot_area.Height;
+                    break;
+                }
+
+                x = 0.5f * (hot_area.Width - w);
+                y = 0.5f * (hot_area.Height - h);
+
+                Rectangle myRect = new Rectangle(
+                    (int)Math.Round(x),
+                    (int)Math.Round(y),
+                    (int)Math.Round(w),
+                    (int)Math.Round(h)
+                    );
+                e.Graphics.DrawImage(
+                    image,
+                    myRect,
+                    0,
+                    0,
+                    image.Width,
+                    image.Height,
+                    GraphicsUnit.Pixel);
+                e.Graphics.Restore(state);
+            }
+
+            if (is_preview)
+            {
+                e.Graphics.DrawRectangle(new Pen(Color.Red, 1), printable_area.X, printable_area.Y, printable_area.Width, printable_area.Height);
+                e.Graphics.DrawRectangle(new Pen(Color.Blue, 1), e.MarginBounds);
+                is_preview = false;
+            }
+        }
+        private void printer_preview_Click(object sender, EventArgs e)
+        {
+            previewDlg.Document = pdDocument;
+            is_preview = true;
+            previewDlg.ShowDialog();
+        }
+        private void printer_setup_Click(object sender, EventArgs e)
+        {
+            setupDlg.Document = pdDocument;
+            setupDlg.AllowMargins = true;
+            setupDlg.AllowOrientation = true;
+            setupDlg.AllowPaper = true;
+            setupDlg.AllowPrinter = true;
+            setupDlg.PageSettings = pageSettings;
+
+            PrintSettings s = Utils.LoadPrintSettings(path, setupDlg.PageSettings);
+            if (is_pressed_ok || s != null)
+            {
+                Utils.FixMarginsBug(setupDlg.PageSettings);
+            }
+
+            DialogResult ret = setupDlg.ShowDialog();
+            is_pressed_ok = ret == DialogResult.OK;
+            if (is_pressed_ok)
+            {
+                pdDocument.DefaultPageSettings = setupDlg.PageSettings.Clone() as PageSettings;
+                Utils.SavePrintSettings(path, setupDlg.PageSettings, (ScaleMode)comboBox1.SelectedItem);
+            }
+        }
+        private void print_impl(UltraCombos.Utility.Image request)
+        {
+            var data = request.Content.ToByteArray();
+            MemoryStream ms = new MemoryStream(data);            
+            pictureBox.Image = System.Drawing.Image.FromStream(ms);
+            pdDocument.Print();
+            
+            Console.WriteLine("print_impl");
+        }
+        private void printer_scale_mode_Changed(object sender, EventArgs e)
+        {
+            if (pageSettings == null)
+            {
+                return;
+            }
+            Utils.SavePrintSettings(path, pageSettings, (ScaleMode)comboBox1.SelectedItem);
+        }
+    }
+
+    sealed class Utils
+    {
+        //WTF Bug...
+        static public void FixMarginsBug(PageSettings s)
+        {
+            double left     = s.Margins.Left;
+            double right    = s.Margins.Right;
+            double top      = s.Margins.Top;
+            double Bottom   = s.Margins.Bottom;
+
+            s.Margins.Left     = Convert.ToInt32(left * 2.54);
+            s.Margins.Right    = Convert.ToInt32(right * 2.54);
+            s.Margins.Top      = Convert.ToInt32(top * 2.54);
+            s.Margins.Bottom   = Convert.ToInt32(Bottom * 2.54);
+        }
+
+        static public PrintSettings LoadPrintSettings(string path, PageSettings s)
+        {
+            if (!File.Exists(path))
+            {
+                return null;
+            }
+
+            string json = File.ReadAllText(path);
+            var obj = JsonConvert.DeserializeObject<PrintSettings>(json);
+            if (obj == null)
+            {
+                return null;
+            }
+
+            obj.To(s);
+            return obj;
+        }
+
+        static public bool SavePrintSettings(string path, PageSettings s, Form1.ScaleMode scale_mode)
+        {
+            var obj = new PrintSettings();
+            obj.From(s);
+            obj.ScaleMode = scale_mode;
+            string json = JsonConvert.SerializeObject(obj, Formatting.Indented);
+            File.WriteAllText(path, json);
+            return true;
+        }
+    }
+
+
+    public class PrintSettings
+    {
+        public PaperSize        PaperSize;
+        public PaperSource      PaperSource;
+        public Margins          Margins;
+        public bool             Landscape;
+        public Form1.ScaleMode  ScaleMode;
+
+        public void To(PageSettings s)
+        {
+            s.PaperSize   = PaperSize;
+            s.PaperSource = PaperSource;
+            s.Margins     = Margins;
+            s.Landscape   = Landscape;
+        }
+
+        public void From(PageSettings s)
+        {
+            PaperSize   = s.PaperSize;
+            PaperSource = s.PaperSource;
+            Margins     = s.Margins;
+            Landscape   = s.Landscape;
+        }
+
+    }
+
+    public class PrinterService
+    {
+        //public int port = 54578;
+        protected Server server;
+        public void StartServer(IEnumerable<ChannelOption> options, IEnumerable<ServerServiceDefinition> services, int port)
+        {
+            try
+            {
+                server = new Server(options)
+                {
+                    Ports = { new ServerPort("0.0.0.0", port, ServerCredentials.Insecure) }
+                };
+                foreach (var def in services)
+                    server.Services.Add(def);
+
+                server.Start();
+                //Log("Start Grpc Server");
+                Console.WriteLine("Start Grpc Server");
+            }
+            catch (System.Exception e)
+            {
+                //Log(e.Message, LogType.Error);
+                Console.WriteLine(e.Message);
+            }
+        }
+        ~PrinterService()
+        {
+            Shutdown();
+        }
+        protected void Shutdown()
+        {
+            if (server != null)
+            {
+                try
+                {
+                    server.ShutdownAsync().Wait();
+                    server = null;
+                }
+                catch { }
+            }
+        }
+        /*
+        protected void Log(object msg, LogType type = LogType.Log)
+        {
+            Debug.unityLogger.Log(type, $"<b>[Grpc Server]</b> {msg}");
+
+        }
+        */
+    }
+    public class PrinterImpl : Printer.PrinterBase
+    {
+        public delegate void PrintDelegate(UltraCombos.Utility.Image request);
+        public event PrintDelegate onPrint;
+        public PrinterImpl(PrintDelegate func)
+        {
+            onPrint += func;
+        }
+        public override Task<Empty> Print(UltraCombos.Utility.Image request, grpc::ServerCallContext context)
+        {
+            //throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
+            onPrint.Invoke(request);
+            return Task.FromResult(new Empty());
+        }
+    }
+}

03_RoyalGallery/DotNet-PrinterController/PrinterController/Program.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace TestPrinter
+{
+    static class Program
+    {
+        /// <summary>
+        /// The main entry point for the application.
+        /// </summary>
+        [STAThread]
+        static void Main()
+        {
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            Application.Run(new Form1());
+        }
+    }
+}

03_RoyalGallery/DotNet-PrinterController/PrinterController/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("TestPrinter")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("TestPrinter")]
+[assembly: AssemblyCopyright("Copyright ©  2018")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("a8c4999e-be74-44ff-8320-c95e2eb43c6f")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

03_RoyalGallery/DotNet-PrinterController/PrinterController/Properties/Resources.Designer.cs

@@ -0,0 +1,71 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace TestPrinter.Properties
+{
+
+
+    /// <summary>
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
+    /// </summary>
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources
+    {
+
+        private static global::System.Resources.ResourceManager resourceMan;
+
+        private static global::System.Globalization.CultureInfo resourceCulture;
+
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources()
+        {
+        }
+
+        /// <summary>
+        ///   Returns the cached ResourceManager instance used by this class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager
+        {
+            get
+            {
+                if ((resourceMan == null))
+                {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("TestPrinter.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+
+        /// <summary>
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture
+        {
+            get
+            {
+                return resourceCulture;
+            }
+            set
+            {
+                resourceCulture = value;
+            }
+        }
+    }
+}

03_RoyalGallery/DotNet-PrinterController/PrinterController/Properties/Resources.resx

@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

03_RoyalGallery/DotNet-PrinterController/PrinterController/Properties/Settings.Designer.cs

@@ -0,0 +1,30 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace TestPrinter.Properties
+{
+
+
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
+    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase
+    {
+
+        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
+
+        public static Settings Default
+        {
+            get
+            {
+                return defaultInstance;
+            }
+        }
+    }
+}

03_RoyalGallery/DotNet-PrinterController/PrinterController/Properties/Settings.settings

@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='utf-8'?>
+<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
+  <Profiles>
+    <Profile Name="(Default)" />
+  </Profiles>
+  <Settings />
+</SettingsFile>

03_RoyalGallery/DotNet-PrinterController/PrinterController/Ultracombos.printerGrpc.cs

@@ -0,0 +1,97 @@
+// <auto-generated>
+//     Generated by the protocol buffer compiler.  DO NOT EDIT!
+//     source: ultracombos.printer.proto
+// </auto-generated>
+#pragma warning disable 0414, 1591
+#region Designer generated code
+
+using grpc = global::Grpc.Core;
+
+namespace UltraCombos.Utility {
+  public static partial class Printer
+  {
+    static readonly string __ServiceName = "UltraCombos.Utility.Printer";
+
+    static readonly grpc::Marshaller<global::UltraCombos.Utility.Image> __Marshaller_UltraCombos_Utility_Image = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::UltraCombos.Utility.Image.Parser.ParseFrom);
+    static readonly grpc::Marshaller<global::UltraCombos.Utility.Empty> __Marshaller_UltraCombos_Utility_Empty = grpc::Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::UltraCombos.Utility.Empty.Parser.ParseFrom);
+
+    static readonly grpc::Method<global::UltraCombos.Utility.Image, global::UltraCombos.Utility.Empty> __Method_Print = new grpc::Method<global::UltraCombos.Utility.Image, global::UltraCombos.Utility.Empty>(
+        grpc::MethodType.Unary,
+        __ServiceName,
+        "Print",
+        __Marshaller_UltraCombos_Utility_Image,
+        __Marshaller_UltraCombos_Utility_Empty);
+
+    /// <summary>Service descriptor</summary>
+    public static global::Google.Protobuf.Reflection.ServiceDescriptor Descriptor
+    {
+      get { return global::UltraCombos.Utility.UltracombosPrinterReflection.Descriptor.Services[0]; }
+    }
+
+    /// <summary>Base class for server-side implementations of Printer</summary>
+    public abstract partial class PrinterBase
+    {
+      public virtual global::System.Threading.Tasks.Task<global::UltraCombos.Utility.Empty> Print(global::UltraCombos.Utility.Image request, grpc::ServerCallContext context)
+      {
+        throw new grpc::RpcException(new grpc::Status(grpc::StatusCode.Unimplemented, ""));
+      }
+
+    }
+
+    /// <summary>Client for Printer</summary>
+    public partial class PrinterClient : grpc::ClientBase<PrinterClient>
+    {
+      /// <summary>Creates a new client for Printer</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
+      public PrinterClient(grpc::Channel channel) : base(channel)
+      {
+      }
+      /// <summary>Creates a new client for Printer that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
+      public PrinterClient(grpc::CallInvoker callInvoker) : base(callInvoker)
+      {
+      }
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      protected PrinterClient() : base()
+      {
+      }
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
+      protected PrinterClient(ClientBaseConfiguration configuration) : base(configuration)
+      {
+      }
+
+      public virtual global::UltraCombos.Utility.Empty Print(global::UltraCombos.Utility.Image request, grpc::Metadata headers = null, global::System.DateTime? deadline = null, global::System.Threading.CancellationToken cancellationToken = default(global::System.Threading.CancellationToken))
+      {
+        return Print(request, new grpc::CallOptions(headers, deadline, cancellationToken));
+      }
+      public virtual global::UltraCombos.Utility.Empty Print(global::UltraCombos.Utility.Image request, grpc::CallOptions options)
+      {
+        return CallInvoker.BlockingUnaryCall(__Method_Print, null, options, request);
+      }
+      public virtual grpc::AsyncUnaryCall<global::UltraCombos.Utility.Empty> PrintAsync(global::UltraCombos.Utility.Image request, grpc::Metadata headers = null, global::System.DateTime? deadline = null, global::System.Threading.CancellationToken cancellationToken = default(global::System.Threading.CancellationToken))
+      {
+        return PrintAsync(request, new grpc::CallOptions(headers, deadline, cancellationToken));
+      }
+      public virtual grpc::AsyncUnaryCall<global::UltraCombos.Utility.Empty> PrintAsync(global::UltraCombos.Utility.Image request, grpc::CallOptions options)
+      {
+        return CallInvoker.AsyncUnaryCall(__Method_Print, null, options, request);
+      }
+      /// <summary>Creates a new instance of client from given <c>ClientBaseConfiguration</c>.</summary>
+      protected override PrinterClient NewInstance(ClientBaseConfiguration configuration)
+      {
+        return new PrinterClient(configuration);
+      }
+    }
+
+    /// <summary>Creates service definition that can be registered with a server</summary>
+    /// <param name="serviceImpl">An object implementing the server-side handling logic.</param>
+    public static grpc::ServerServiceDefinition BindService(PrinterBase serviceImpl)
+    {
+      return grpc::ServerServiceDefinition.CreateBuilder()
+          .AddMethod(__Method_Print, serviceImpl.Print).Build();
+    }
+
+  }
+}
+#endregion

03_RoyalGallery/DotNet-PrinterController/PrinterController/UltracombosPrinter.cs

@@ -0,0 +1,276 @@
+// <auto-generated>
+//     Generated by the protocol buffer compiler.  DO NOT EDIT!
+//     source: ultracombos.printer.proto
+// </auto-generated>
+#pragma warning disable 1591, 0612, 3021
+#region Designer generated code
+
+using pb = global::Google.Protobuf;
+using pbc = global::Google.Protobuf.Collections;
+using pbr = global::Google.Protobuf.Reflection;
+using scg = global::System.Collections.Generic;
+namespace UltraCombos.Utility {
+
+  /// <summary>Holder for reflection information generated from ultracombos.printer.proto</summary>
+  public static partial class UltracombosPrinterReflection {
+
+    #region Descriptor
+    /// <summary>File descriptor for ultracombos.printer.proto</summary>
+    public static pbr::FileDescriptor Descriptor {
+      get { return descriptor; }
+    }
+    private static pbr::FileDescriptor descriptor;
+
+    static UltracombosPrinterReflection() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
+          string.Concat(
+            "Chl1bHRyYWNvbWJvcy5wcmludGVyLnByb3RvEhNVbHRyYUNvbWJvcy5VdGls",
+            "aXR5IgcKBUVtcHR5IhgKBUltYWdlEg8KB2NvbnRlbnQYASABKAwyTAoHUHJp",
+            "bnRlchJBCgVQcmludBIaLlVsdHJhQ29tYm9zLlV0aWxpdHkuSW1hZ2UaGi5V",
+            "bHRyYUNvbWJvcy5VdGlsaXR5LkVtcHR5IgBiBnByb3RvMw=="));
+      descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
+          new pbr::FileDescriptor[] { },
+          new pbr::GeneratedClrTypeInfo(null, new pbr::GeneratedClrTypeInfo[] {
+            new pbr::GeneratedClrTypeInfo(typeof(global::UltraCombos.Utility.Empty), global::UltraCombos.Utility.Empty.Parser, null, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::UltraCombos.Utility.Image), global::UltraCombos.Utility.Image.Parser, new[]{ "Content" }, null, null, null)
+          }));
+    }
+    #endregion
+
+  }
+  #region Messages
+  public sealed partial class Empty : pb::IMessage<Empty> {
+    private static readonly pb::MessageParser<Empty> _parser = new pb::MessageParser<Empty>(() => new Empty());
+    private pb::UnknownFieldSet _unknownFields;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<Empty> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::UltraCombos.Utility.UltracombosPrinterReflection.Descriptor.MessageTypes[0]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Empty() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Empty(Empty other) : this() {
+      _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Empty Clone() {
+      return new Empty(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as Empty);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(Empty other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      return Equals(_unknownFields, other._unknownFields);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (_unknownFields != null) {
+        hash ^= _unknownFields.GetHashCode();
+      }
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (_unknownFields != null) {
+        _unknownFields.WriteTo(output);
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (_unknownFields != null) {
+        size += _unknownFields.CalculateSize();
+      }
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(Empty other) {
+      if (other == null) {
+        return;
+      }
+      _unknownFields = pb::UnknownFieldSet.MergeFrom(_unknownFields, other._unknownFields);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            _unknownFields = pb::UnknownFieldSet.MergeFieldFrom(_unknownFields, input);
+            break;
+        }
+      }
+    }
+
+  }
+
+  public sealed partial class Image : pb::IMessage<Image> {
+    private static readonly pb::MessageParser<Image> _parser = new pb::MessageParser<Image>(() => new Image());
+    private pb::UnknownFieldSet _unknownFields;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pb::MessageParser<Image> Parser { get { return _parser; } }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::UltraCombos.Utility.UltracombosPrinterReflection.Descriptor.MessageTypes[1]; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Image() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Image(Image other) : this() {
+      content_ = other.content_;
+      _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public Image Clone() {
+      return new Image(this);
+    }
+
+    /// <summary>Field number for the "content" field.</summary>
+    public const int ContentFieldNumber = 1;
+    private pb::ByteString content_ = pb::ByteString.Empty;
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public pb::ByteString Content {
+      get { return content_; }
+      set {
+        content_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override bool Equals(object other) {
+      return Equals(other as Image);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public bool Equals(Image other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (Content != other.Content) return false;
+      return Equals(_unknownFields, other._unknownFields);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override int GetHashCode() {
+      int hash = 1;
+      if (Content.Length != 0) hash ^= Content.GetHashCode();
+      if (_unknownFields != null) {
+        hash ^= _unknownFields.GetHashCode();
+      }
+      return hash;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (Content.Length != 0) {
+        output.WriteRawTag(10);
+        output.WriteBytes(Content);
+      }
+      if (_unknownFields != null) {
+        _unknownFields.WriteTo(output);
+      }
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public int CalculateSize() {
+      int size = 0;
+      if (Content.Length != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeBytesSize(Content);
+      }
+      if (_unknownFields != null) {
+        size += _unknownFields.CalculateSize();
+      }
+      return size;
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(Image other) {
+      if (other == null) {
+        return;
+      }
+      if (other.Content.Length != 0) {
+        Content = other.Content;
+      }
+      _unknownFields = pb::UnknownFieldSet.MergeFrom(_unknownFields, other._unknownFields);
+    }
+
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            _unknownFields = pb::UnknownFieldSet.MergeFieldFrom(_unknownFields, input);
+            break;
+          case 10: {
+            Content = input.ReadBytes();
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  #endregion
+
+}
+
+#endregion Designer generated code

03_RoyalGallery/DotNet-PrinterController/PrinterController/packages.config

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Google.Protobuf" version="3.6.1" targetFramework="net461" />
+  <package id="Grpc" version="1.21.0" targetFramework="net461" />
+  <package id="Grpc.Core" version="1.21.0" targetFramework="net461" />
+  <package id="Grpc.Core.Api" version="1.21.0" targetFramework="net461" />
+  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net461" />
+  <package id="System.Interactive.Async" version="3.2.0" targetFramework="net461" />
+</packages>