add GetPixels() and GetPixel() APIs (wip).

Assets/GetPixelsExample.cs

@@ -0,0 +1,36 @@
+using UnityEngine;
+
+public class GetPixelsExample : MonoBehaviour
+{
+    [SerializeField] uDesktopDuplication.Texture uddTexture;
+
+    [SerializeField] int x = 100;
+    [SerializeField] int y = 100;
+    const int width = 64;
+    const int height = 32;
+    
+    public Texture2D texture;
+    Color32[] colors = new Color32[width * height];
+
+    void Start()
+    {
+        // must be called (performance will be slightly down).
+        uDesktopDuplication.Manager.useGetPixels = true;
+
+        texture = new Texture2D(width, height, TextureFormat.ARGB32, false);
+        GetComponent<Renderer>().material.mainTexture = texture;
+    }
+
+    void Update()
+    {
+        var monitor = uddTexture.monitor;
+        if (!monitor.hasBeenUpdated) return;
+
+        if (monitor.GetPixels(colors, x, y, width, height)) {
+            texture.SetPixels32(colors);
+            texture.Apply();
+        }
+
+        Debug.Log(monitor.GetPixel(monitor.cursorX, monitor.cursorY));
+    }
+}

Assets/GetPixelsExample.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: fd3f838ff57152e44a1810274a9df49b
+timeCreated: 1480420430
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/uDesktopDuplication/Examples/Scenes/GetPixels.unity.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 38a5db360d5147c46ae925104162b881
+timeCreated: 1480420198
+licenseType: Pro
+DefaultImporter:
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/uDesktopDuplication/Examples/Scripts/GetPixels.cs

@@ -0,0 +1,15 @@
+using UnityEngine;
+using System.Collections;
+
+public class GetPixels : MonoBehaviour {
+
+	// Use this for initialization
+	void Start () {
+	
+	}
+	
+	// Update is called once per frame
+	void Update () {
+	
+	}
+}

Assets/uDesktopDuplication/Examples/Scripts/GetPixels.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: bc0250b1a79f38b48bfddf1e05bda638
+timeCreated: 1480420057
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/uDesktopDuplication/Scripts/Lib.cs

@@ -1,4 +1,5 @@
-using System;
+using UnityEngine;
+using System;
 using System.Text;
 using System.Runtime.InteropServices;
 
@@ -78,6 +79,8 @@ public static class Lib
     [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
     public delegate void DebugLogDelegate(string str);
 
+    [DllImport("uDesktopDuplication")]
+    public static extern bool IsInitialized();
     [DllImport("uDesktopDuplication")]
     public static extern void Initialize();
     [DllImport("uDesktopDuplication")]
@@ -164,6 +167,12 @@ public static class Lib
     public static extern int GetDirtyRectCount(int id);
     [DllImport("uDesktopDuplication", EntryPoint = "GetDirtyRects")]
     private static extern IntPtr GetDirtyRects_Internal(int id);
+    [DllImport("uDesktopDuplication", EntryPoint = "GetPixels")]
+    private static extern bool GetPixels_Internal(int id, System.IntPtr ptr, int x, int y, int width, int height);
+    [DllImport("uDesktopDuplication")]
+    public static extern bool HasBeenUpdated(int id);
+    [DllImport("uDesktopDuplication")]
+    public static extern bool UseGetPixels(bool use);
 
     public static string GetName(int id)
     {
@@ -197,6 +206,38 @@ public static class Lib
         }
         return rects;
     }
+
+    public static Color32[] GetPixels(int id, int x, int y, int width, int height)
+    {
+        var color = new Color32[width * height];       
+        GetPixels(id, color, x, y, width, height);
+        return color;
+    }
+
+    public static bool GetPixels(int id, Color32[] colors, int x, int y, int width, int height)
+    {
+        if (!Mathf.IsPowerOfTwo(width) || !Mathf.IsPowerOfTwo(height)) {
+            Debug.LogErrorFormat("width and height must be power of two.");
+            return false;
+        }
+        if (colors.Length < width * height) {
+            Debug.LogErrorFormat("colors is small.", id, x, y, width, height);
+            return false;
+        }
+		var handle = GCHandle.Alloc(colors, GCHandleType.Pinned);
+		var ptr = handle.AddrOfPinnedObject();
+        if (!GetPixels_Internal(id, ptr, x, y, width, height)) {
+            Debug.LogErrorFormat("GetPixels({0}, {1}, {2}, {3}, {4}) failed.", id, x, y, width, height);
+            return false;
+        }
+        handle.Free();
+        return true;
+    }
+
+    public static Color32 GetPixel(int id, int x, int y)
+    {
+        return GetPixels(id, x, y, 1, 1)[0];
+    }
 }
 
 }

Assets/uDesktopDuplication/Scripts/Manager.cs

@@ -52,6 +52,14 @@ public class Manager : MonoBehaviour
         }
     }
 
+    static public bool useGetPixels
+    {
+        set
+        {
+            Lib.UseGetPixels(value);
+        }
+    }
+
     [Tooltip("Debug mode is not applied while running.")]
     [SerializeField] DebugMode debugMode = DebugMode.File;
 

Assets/uDesktopDuplication/Scripts/Monitor.cs

@@ -232,6 +232,11 @@ public class Monitor
         get { return Lib.GetDirtyRects(id); }
     }
 
+    public bool hasBeenUpdated
+    {
+        get { return Lib.HasBeenUpdated(id); }
+    }
+
     public bool shouldBeUpdated
     {
         get; 
@@ -317,6 +322,21 @@ public class Monitor
     {
         CreateTextureIfNeeded();
     }
+
+    public Color32[] GetPixels(int x, int y, int width, int height)
+    {
+        return Lib.GetPixels(id, x, y, width, height);
+    }
+
+    public bool GetPixels(Color32[] colors, int x, int y, int width, int height)
+    {
+        return Lib.GetPixels(id, colors, x, y, width, height);
+    }
+
+    public Color32 GetPixel(int x, int y)
+    {
+        return Lib.GetPixel(id, x, y);
+    }
 }
 
 }