initial project, implement binary format of display

.dockerignore

@@ -0,0 +1,25 @@
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/.idea
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/azds.yaml
+**/bin
+**/charts
+**/docker-compose*
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+LICENSE
+README.md

.editorconfig

@@ -0,0 +1,10 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+max_line_length = 120
+tab_width = 4

.gitignore

@@ -0,0 +1,3 @@
+bin
+obj
+.idea

TanksServer.sln

@@ -0,0 +1,16 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TanksServer", "TanksServer\TanksServer.csproj", "{D88BF376-47A4-4C72-ADD1-983F9285C351}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{D88BF376-47A4-4C72-ADD1-983F9285C351}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D88BF376-47A4-4C72-ADD1-983F9285C351}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D88BF376-47A4-4C72-ADD1-983F9285C351}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D88BF376-47A4-4C72-ADD1-983F9285C351}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

TanksServer/DisplayPixelBuffer.cs

@@ -0,0 +1,55 @@
+namespace TanksServer;
+
+public sealed class DisplayPixelBuffer(byte[] data)
+{
+    public byte[] Data => data;
+
+    public byte Magic1
+    {
+        get => data[0];
+        set => data[0] = value;
+    }
+
+    public byte Magic2
+    {
+        get => data[1];
+        set => data[1] = value;
+    }
+
+    public ushort X
+    {
+        get => GetTwoBytes(2);
+        set => SetTwoBytes(2, value);
+    }
+
+    public ushort Y
+    {
+        get => GetTwoBytes(4);
+        set => SetTwoBytes(4, value);
+    }
+
+    public ushort WidthInTiles
+    {
+        get => GetTwoBytes(6);
+        set => SetTwoBytes(6, value);
+    }
+
+    public ushort HeightInPixels
+    {
+        get => GetTwoBytes(8);
+        set => SetTwoBytes(8, value);
+    }
+
+    public FixedSizeBitFieldView Pixels { get; } = new(data.AsMemory(10));
+
+    private ushort GetTwoBytes(int index)
+    {
+        return (ushort)(data[index] * byte.MaxValue + data[index + 1]);
+    }
+
+    private void SetTwoBytes(int index, ushort value)
+    {
+        data[index] = (byte)(value / byte.MaxValue);
+        data[index + 1] = (byte)(value % byte.MaxValue);
+    }
+}

TanksServer/Dockerfile

@@ -0,0 +1,20 @@
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
+WORKDIR /app
+EXPOSE 80
+EXPOSE 443
+
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+WORKDIR /src
+COPY ["TanksServer/TanksServer.csproj", "TanksServer/"]
+RUN dotnet restore "TanksServer/TanksServer.csproj"
+COPY . .
+WORKDIR "/src/TanksServer"
+RUN dotnet build "TanksServer.csproj" -c Release -o /app/build
+
+FROM build AS publish
+RUN dotnet publish "TanksServer.csproj" -c Release -o /app/publish /p:UseAppHost=false
+
+FROM base AS final
+WORKDIR /app
+COPY --from=publish /app/publish .
+ENTRYPOINT ["dotnet", "TanksServer.dll"]

TanksServer/FixedSizeBitFieldView.cs

@@ -0,0 +1,101 @@
+using System.Collections;
+
+namespace TanksServer;
+
+public sealed class FixedSizeBitFieldView(Memory<byte> data) : IList<bool>
+{
+    public int Count => data.Length * 8;
+    public bool IsReadOnly => false;
+
+    IEnumerator IEnumerable.GetEnumerator()
+    {
+        return GetEnumerator();
+    }
+
+    public IEnumerator<bool> GetEnumerator()
+    {
+        return Enumerable().GetEnumerator();
+
+        IEnumerable<bool> Enumerable()
+        {
+            for (var i = 0; i < Count; i++)
+                yield return this[i];
+        }
+    }
+
+    public void Clear()
+    {
+        var span = data.Span;
+        for (var i = 0; i < data.Length; i++)
+            span[i] = 0;
+    }
+
+    public void CopyTo(bool[] array, int arrayIndex)
+    {
+        for (var i = 0; i < Count && i + arrayIndex < array.Length; i++)
+            array[i + arrayIndex] = this[i];
+    }
+
+    private static (int byteIndex, int bitInByteIndex) GetIndexes(int bitIndex)
+    {
+        var byteIndex = bitIndex / 8;
+        var bitInByteIndex = 7 - bitIndex % 8;
+        return (byteIndex, bitInByteIndex);
+    }
+
+    public bool this[int bitIndex]
+    {
+        get
+        {
+            var (byteIndex, bitInByteIndex) = GetIndexes(bitIndex);
+            var bitInByteMask = (byte)(1 << bitInByteIndex);
+            return (data.Span[byteIndex] & bitInByteMask) != 0;
+        }
+
+        set
+        {
+            var (byteIndex, bitInByteIndex) = GetIndexes(bitIndex);
+            var bitInByteMask = (byte)(1 << bitInByteIndex);
+
+            if (value)
+            {
+                data.Span[byteIndex] |= bitInByteMask;
+            }
+            else
+            {
+                var withoutBitMask = (byte)(ushort.MaxValue ^ bitInByteMask);
+                data.Span[byteIndex] &= withoutBitMask;
+            }
+        }
+    }
+
+    public void Add(bool item)
+    {
+        throw new NotSupportedException();
+    }
+
+    public bool Contains(bool item)
+    {
+        throw new NotSupportedException();
+    }
+
+    public bool Remove(bool item)
+    {
+        throw new NotSupportedException();
+    }
+
+    public int IndexOf(bool item)
+    {
+        throw new NotSupportedException();
+    }
+
+    public void Insert(int index, bool item)
+    {
+        throw new NotSupportedException();
+    }
+
+    public void RemoveAt(int index)
+    {
+        throw new NotSupportedException();
+    }
+}

TanksServer/GlobalUsings.cs

@@ -0,0 +1,3 @@
+global using System;
+global using System.Collections.Generic;
+global using System.Threading.Tasks;

TanksServer/MapDrawer.cs

@@ -0,0 +1,40 @@
+namespace TanksServer;
+
+public class MapDrawer(MapService map)
+{
+    private const uint GameFieldPixelCount = MapService.PixelsPerRow * MapService.PixelsPerColumn;
+
+    public void DrawInto(DisplayPixelBuffer buf)
+    {
+        for (var tileY = 0; tileY < MapService.TilesPerColumn; tileY++)
+        for (var tileX = 0; tileX < MapService.TilesPerRow; tileX++)
+        {
+            if (!map.IsCurrentlyWall(tileX, tileY))
+                continue;
+
+            var absoluteTilePixelY = tileY * MapService.TileSize;
+            for (var pixelInTileY = 0; pixelInTileY < MapService.TileSize; pixelInTileY++)
+            {
+                var absoluteRowStartPixelIndex = (absoluteTilePixelY + pixelInTileY) * MapService.PixelsPerRow
+                                                 + tileX * MapService.TileSize;
+                for (var pixelInTileX = 0; pixelInTileX < MapService.TileSize; pixelInTileX++)
+                    buf.Pixels[absoluteRowStartPixelIndex + pixelInTileX] = pixelInTileX % 2 == pixelInTileY % 2;
+            }
+        }
+    }
+
+    public DisplayPixelBuffer CreateGameFieldPixelBuffer()
+    {
+        var data = new byte[10 + GameFieldPixelCount / 8];
+        var result = new DisplayPixelBuffer(data)
+        {
+            Magic1 = 0,
+            Magic2 = 19,
+            X = 0,
+            Y = 0,
+            WidthInTiles = MapService.TilesPerRow,
+            HeightInPixels = MapService.PixelsPerColumn
+        };
+        return result;
+    }
+}

TanksServer/MapService.cs

@@ -0,0 +1,41 @@
+namespace TanksServer;
+
+public class MapService
+{
+    public const int TilesPerRow = 44;
+    public const int TilesPerColumn = 20;
+    public const int TileSize = 8;
+    public const int PixelsPerRow = TilesPerRow * TileSize;
+    public const int PixelsPerColumn = TilesPerColumn * TileSize;
+
+    private string _map = """
+                          ############################################
+                          #...................##.....................#
+                          #...................##.....................#
+                          #.....####......................####.......#
+                          #..........................................#
+                          #............###...........###.............#
+                          #............#...............#.............#
+                          #...##.......#...............#......##.....#
+                          #....#..............................#......#
+                          #....#..##......................##..#......#
+                          #....#..##......................##..#......#
+                          #....#..............................#......#
+                          #...##.......#...............#......##.....#
+                          #............#...............#.............#
+                          #............###...........###.............#
+                          #..........................................#
+                          #.....####......................####.......#
+                          #...................##.....................#
+                          #...................##.....................#
+                          ############################################
+                          """
+        .ReplaceLineEndings(string.Empty);
+
+    private char this[int tileX, int tileY] => _map[tileX + tileY * TilesPerRow];
+
+    public bool IsCurrentlyWall(int tileX, int tileY)
+    {
+        return this[tileX, tileY] == '#';
+    }
+}

TanksServer/Program.cs

@@ -0,0 +1,41 @@
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace TanksServer;
+
+internal static class Program
+{
+    public static async Task Main(string[] args)
+    {
+        var app = Configure(args);
+
+        var display = app.Services.GetRequiredService<ServicePointDisplay>();
+        var mapDrawer = app.Services.GetRequiredService<MapDrawer>();
+
+        var buffer = mapDrawer.CreateGameFieldPixelBuffer();
+        mapDrawer.DrawInto(buffer);
+        await display.Send(buffer);
+
+        app.UseWebSockets();
+
+        app.Map("/screen", async context =>
+        {
+            if (!context.WebSockets.IsWebSocketRequest)
+                return;
+            using var ws = await context.WebSockets.AcceptWebSocketAsync();
+        });
+
+        await app.RunAsync();
+    }
+
+    private static WebApplication Configure(string[] args)
+    {
+        var builder = WebApplication.CreateSlimBuilder(args);
+
+        builder.Services.AddSingleton<ServicePointDisplay>();
+        builder.Services.AddSingleton<MapService>();
+        builder.Services.AddSingleton<MapDrawer>();
+
+        return builder.Build();
+    }
+}

TanksServer/Properties/launchSettings.json

@@ -0,0 +1,12 @@
+{
+    "$schema": "http://json.schemastore.org/launchsettings.json",
+    "profiles": {
+        "http": {
+            "commandName": "Project",
+            "dotnetRunMessages": true,
+            "environmentVariables": {
+                "ASPNETCORE_ENVIRONMENT": "Development"
+            }
+        }
+    }
+}

TanksServer/ServicePointDisplay.cs

@@ -0,0 +1,14 @@
+using System.Net.Sockets;
+using Microsoft.Extensions.Options;
+
+namespace TanksServer;
+
+public class ServicePointDisplay(IOptions<ServicePointDisplayConfiguration> options)
+{
+    private readonly UdpClient _udpClient = new(options.Value.Hostname, options.Value.Port);
+
+    public ValueTask<int> Send(DisplayPixelBuffer buffer)
+    {
+        return _udpClient.SendAsync(buffer.Data);
+    }
+}

TanksServer/ServicePointDisplayConfiguration.cs

@@ -0,0 +1,7 @@
+namespace TanksServer;
+
+public class ServicePointDisplayConfiguration
+{
+    public string Hostname { get; set; } = string.Empty;
+    public int Port { get; set; }
+}

TanksServer/TanksServer.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <ImplicitUsings>disable</ImplicitUsings>
+        <InvariantGlobalization>true</InvariantGlobalization>
+        <PublishAot>true</PublishAot>
+        <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <Content Include="..\.dockerignore">
+            <Link>.dockerignore</Link>
+        </Content>
+    </ItemGroup>
+
+</Project>

TanksServer/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+    "Logging": {
+        "LogLevel": {
+            "Default": "Information",
+            "Microsoft.AspNetCore": "Warning"
+        }
+    }
+}

TanksServer/appsettings.json

@@ -0,0 +1,9 @@
+{
+    "Logging": {
+        "LogLevel": {
+            "Default": "Information",
+            "Microsoft.AspNetCore": "Warning"
+        }
+    },
+    "AllowedHosts": "*"
+}

global.json

@@ -0,0 +1,7 @@
+{
+  "sdk": {
+    "version": "8.0.0",
+    "rollForward": "latestMajor",
+    "allowPrerelease": true
+  }
+}