feat(LinuxFramebuffer): Allow set DRM output Connector

src/Linux/Avalonia.LinuxFramebuffer/DrmConnectorType.cs

@@ -0,0 +1,25 @@
+namespace Avalonia.LinuxFramebuffer;
+
+/// <summary>
+/// specific the type of connector is HDMI-A, DVI, DisplayPort, etc.
+/// </summary>
+public enum DrmConnectorType : uint
+{
+    None,
+    VGA,
+    DVI_I,
+    DVI_D,
+    DVI_A,
+    Composite,
+    S_Video,
+    LVDS,
+    Component,
+    DIN,
+    DisplayPort,
+    HDMI_A,
+    HDMI_B,
+    TV,
+    eDP,
+    Virtual,
+    DSI,
+}

src/Linux/Avalonia.LinuxFramebuffer/DrmOutputOptions.cs

@@ -1,8 +1,10 @@
-using Avalonia.LinuxFramebuffer.Output;
 using Avalonia.Media;
 
 namespace Avalonia.LinuxFramebuffer
 {
+    /// <summary>
+    /// DRM Output Options
+    /// </summary>
     public class DrmOutputOptions
     {
         /// <summary>
@@ -28,5 +30,17 @@ public class DrmOutputOptions
         /// If NULL preferred mode will be used.
         /// </summary>
         public PixelSize? VideoMode { get; set; }
+
+        /// <summary>
+        /// Specific whether our connector is HDMI-A, DVI, DisplayPort, etc.
+        /// If NULL preferred connector will be used.
+        /// </summary>
+        public DrmConnectorType? ConnectorType { get; init; }
+
+        /// <summary>
+        /// Specific whether connector id using for <see cref="ConnectorType"/>
+        /// If NULL preferred connector id will be used
+        /// </summary>
+        public uint? ConnectorType_Id { get; init; }
     }
 }

src/Linux/Avalonia.LinuxFramebuffer/EnumerableExtesions.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+
+namespace Avalonia.LinuxFramebuffer;
+
+internal static class EnumerableExtesions
+{
+    public static IEnumerable<TSource> Where<TSource, TArg>(this IEnumerable<TSource> source, Func<TSource, TArg, bool> predicate, TArg arg)
+    {
+        var enumerator = source.GetEnumerator();
+        while (enumerator.MoveNext())
+        {
+            var current = enumerator.Current;
+            if (predicate(current, arg))
+            {
+                yield return current;
+            }
+        }
+    }
+}

src/Linux/Avalonia.LinuxFramebuffer/Output/DrmBindings.cs

@@ -1,14 +1,16 @@
 using System;
-using System.IO;
 using System.Collections.Generic;
 using System.ComponentModel;
+using System.Diagnostics;
+using System.IO;
 using System.Runtime.InteropServices;
 using System.Text.RegularExpressions;
 using static Avalonia.LinuxFramebuffer.NativeUnsafeMethods;
 using static Avalonia.LinuxFramebuffer.Output.LibDrm;
 
 namespace Avalonia.LinuxFramebuffer.Output
 {
+    [DebuggerDisplay("{Name}")]
     public unsafe class DrmConnector
     {
         private static string[] KnownConnectorTypes =
@@ -25,18 +27,21 @@ public unsafe class DrmConnector
         internal uint EncoderId { get; }
         internal List<uint> EncoderIds { get; } = new List<uint>();
         public List<DrmModeInfo> Modes { get; } = new List<DrmModeInfo>();
+        public DrmConnectorType ConnectorType { get; }
+        public uint ConnectorType_Id { get; }
         internal DrmConnector(drmModeConnector* conn)
         {
             Connection = conn->connection;
             Id = conn->connector_id;
             SizeMm = new Size(conn->mmWidth, conn->mmHeight);
             SubPixel = conn->subpixel;
-            for (var c = 0; c < conn->count_encoders;c++) 
+            for (var c = 0; c < conn->count_encoders; c++)
                 EncoderIds.Add(conn->encoders[c]);
             EncoderId = conn->encoder_id;
-            for(var c=0; c<conn->count_modes; c++)
+            for (var c = 0; c < conn->count_modes; c++)
                 Modes.Add(new DrmModeInfo(ref conn->modes[c]));
-
+            ConnectorType = (DrmConnectorType)conn->connector_type;
+            ConnectorType_Id = conn->connector_type_id;
             if (conn->connector_type > KnownConnectorTypes.Length - 1)
                 Name = $"Unknown({conn->connector_type})-{conn->connector_type_id}";
             else
@@ -77,42 +82,38 @@ public DrmEncoder(drmModeEncoder encoder, drmModeCrtc[] crtcs)
             }
         }
     }
-
-
-
+
     public unsafe class DrmResources
     {
-        public List<DrmConnector> Connectors { get; }= new List<DrmConnector>();
+        public List<DrmConnector> Connectors { get; } = new List<DrmConnector>();
         internal Dictionary<uint, DrmEncoder> Encoders { get; } = new Dictionary<uint, DrmEncoder>();
         public DrmResources(int fd, bool connectorsForceProbe = false)
         {
             var res = drmModeGetResources(fd);
             if (res == null)
                 throw new Win32Exception("drmModeGetResources failed");
-            
+
             var crtcs = new drmModeCrtc[res->count_crtcs];
             for (var c = 0; c < res->count_crtcs; c++)
             {
                 var crtc = drmModeGetCrtc(fd, res->crtcs[c]);
                 crtcs[c] = *crtc;
                 drmModeFreeCrtc(crtc);
             }
-            
+
             for (var c = 0; c < res->count_encoders; c++)
             {
                 var enc = drmModeGetEncoder(fd, res->encoders[c]);
                 Encoders[res->encoders[c]] = new DrmEncoder(*enc, crtcs);
                 drmModeFreeEncoder(enc);
             }
-            
+
             for (var c = 0; c < res->count_connectors; c++)
             {
                 var conn = connectorsForceProbe ? drmModeGetConnector(fd, res->connectors[c]) : drmModeGetConnectorCurrent(fd, res->connectors[c]);
                 Connectors.Add(new DrmConnector(conn));
                 drmModeFreeConnector(conn);
             }
-
-
         }
 
         internal void Dump()
@@ -133,38 +134,39 @@ void Print(int off, string s)
                 Print(2, "Modes");
                 foreach (var m in conn.Modes)
                     Print(3, $"{m.Name} {(m.IsPreferred ? "PREFERRED" : "")}");
-
-
             }
         }
     }
-    
+
     public unsafe class DrmCard : IDisposable
     {
         public int Fd { get; private set; }
         public DrmCard(string path = null)
         {
-            if(path == null)
+            if (path == null)
             {
                 var files = Directory.GetFiles("/dev/dri/");
 
-                foreach(var file in files) 
+                foreach (var file in files)
                 {
                     var match = Regex.Match(file, "card[0-9]+");
 
-                    if(match.Success)
+                    if (match.Success)
                     {
                         Fd = open(file, 2, 0);
-                        if(Fd != -1) break; 
-                    }    
+                        if (Fd != -1)
+                            break;
+                    }
                 }
 
-                if(Fd == -1) throw new Win32Exception("Couldn't open /dev/dri/card[0-9]+");
+                if (Fd == -1)
+                    throw new Win32Exception("Couldn't open /dev/dri/card[0-9]+");
             }
-            else 
+            else
             {
                 Fd = open(path, 2, 0);
-                if(Fd == -1) throw new Win32Exception($"Couldn't open {path}");
+                if (Fd == -1)
+                    throw new Win32Exception($"Couldn't open {path}");
             }
         }