pwm: Make identify frame passthrough configurable per destination.

Author: freezy

LibDmd.Test/Stubs/DestinationAlphaNumeric.cs

@@ -8,6 +8,7 @@ public class DestinationAlphaNumeric : IAlphaNumericDestination
 		public string Name => "Destination[Fixed/Gray2]";
 		public bool IsAvailable => true;
 		public bool NeedsDuplicateFrames => false;
+		public bool NeedsIdentificationFrames => false;
 
 		private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
 

LibDmd.Test/Stubs/DestinationDynamic.cs

@@ -8,6 +8,8 @@ namespace LibDmd.Test.Stubs
 	public abstract class DestinationDynamic<TFrame> : IResizableDestination, ITestDestination<TFrame>
 	{
 		public IConnectableObservable<TFrame> Frame { get; private set; }
+
+		public bool NeedsIdentificationFrames => false;
 
 		protected Subject<TFrame> LastFrame = new Subject<TFrame>();
 

LibDmd.Test/Stubs/DestinationFixed.cs

@@ -9,6 +9,7 @@ namespace LibDmd.Test.Stubs
 	public abstract class DestinationFixed<TFrame> : IFixedSizeDestination, ITestDestination<TFrame>
 	{
 		public IConnectableObservable<TFrame> Frame { get; private set; }
+		public bool NeedsIdentificationFrames => false;
 
 		public Dimensions FixedSize { get; }
 

LibDmd/Common/InteropUtil.cs

@@ -3,7 +3,7 @@
 
 namespace LibDmd.Common
 {
-	public class InteropUtil
+	public static class InteropUtil
 	{
 		public static ushort[] ReadUInt16Array(IntPtr data, int length)
 		{
@@ -16,5 +16,17 @@ public static ushort[] ReadUInt16Array(IntPtr data, int length)
 			}
 			return buffer;
 		}
+
+		public static ushort[] ReadByteArray(IntPtr data, int length)
+		{
+			var buffer = new ushort[length];
+			var uint16Buffer = new byte[length * 2];
+			Marshal.Copy(data, uint16Buffer, 0, length * 2);
+			var pos = 0;
+			for (var i = 0; i < length * 2; i += 2) {
+				buffer[pos++] = BitConverter.ToUInt16(uint16Buffer, i);
+			}
+			return buffer;
+		}
 	}
 }

LibDmd/Frame/DmdFrame.cs

@@ -32,7 +32,7 @@ public class DmdFrame : BaseFrame, ICloneable, IEqualityComparer<DmdFrame>
 		/// These frames are used for colorization and should never be rendered (if they exist, that means
 		/// there's a gray-8 frame to be rendered).
 		/// </summary>
-		public bool IsIdentifyFrame { get; protected set; }
+		public bool IsIdentifyFrame { get; private set; }
 
 		/// <summary>
 		/// The bit length of each pixel.

LibDmd/Output/FileOutput/BitmapOutput.cs

@@ -21,6 +21,7 @@ public class BitmapOutput : IBitmapDestination
 		public string Name { get; } = "File Writer";
 		public bool IsAvailable { get; } = true;
 		public bool NeedsDuplicateFrames => false;
+		public bool NeedsIdentificationFrames => false;
 
 		private int _counter;
 		private readonly HashSet<string> _hashes = new HashSet<string>();

LibDmd/Output/FileOutput/GifOutput.cs

@@ -14,6 +14,7 @@ public class GifOutput : IBitmapDestination
 		public string Name { get; } = "GIF Writer";
 		public bool IsAvailable { get; } = true;
 		public bool NeedsDuplicateFrames => false;
+		public bool NeedsIdentificationFrames => false;
 
 		private readonly GifWriter _outputGif;
 

LibDmd/Output/FileOutput/RawOutput.cs

@@ -11,6 +11,7 @@ public class RawOutput : IGray2Destination, IGray4Destination, IResizableDestina
 		public string Name => "Raw Output";
 		public bool IsAvailable => !string.IsNullOrEmpty(_gameName);
 		public bool NeedsDuplicateFrames => false;
+		public bool NeedsIdentificationFrames => false;
 
 		private string _gameName;
 

LibDmd/Output/FileOutput/VideoOutput.cs

@@ -22,6 +22,7 @@ public class VideoOutput : IRgb24Destination, IFixedSizeDestination
 		public string Name { get; } = "Video Writer";
 		public bool IsAvailable { get; } = true;
 		public bool NeedsDuplicateFrames => false;
+		public bool NeedsIdentificationFrames => false;
 
 		private AviWriter _writer;
 		private IAviVideoStream _stream;

LibDmd/Output/IDestination.cs

@@ -27,6 +27,11 @@ public interface IDestination : IDisposable
 		/// </summary>
 		bool NeedsDuplicateFrames { get; }
 
+		/// <summary>
+		/// If true, send identification instead of PWM frames to this destination.
+		/// </summary>
+		bool NeedsIdentificationFrames { get; }
+
 		/// <summary>
 		/// Clears the display.
 		/// </summary>