Spot Removal tool

It is not working yet, but the GUI is (almost) done.
See issue #2239.

rtengine/iimage.h

@@ -325,6 +325,23 @@ public:
         }
     }
 
+    /** Copy the a sub-region of the data to another PlanarRGBData */
+    void copyData(PlanarWhateverData<T> *dest, int x, int y, int width, int height)
+    {
+        assert (dest != NULL);
+        // Make sure that the size is the same, reallocate if necessary
+        dest->allocate(width, height);
+
+        if (dest->width == -1) {
+            printf("ERROR: PlanarRGBData::copyData >>> allocation failed!\n");
+            return;
+        }
+
+        for (int i = y, j = 0; i < y + height; ++i, ++j) {
+            memcpy (dest->v(i) + x, v(j), width * sizeof(T));
+        }
+    }
+
     void rotate (int deg)
     {
 
@@ -727,6 +744,25 @@ public:
         }
     }
 
+    /** Copy the a sub-region of the data to another PlanarRGBData */
+    void copyData(PlanarRGBData<T> *dest, int x, int y, int width, int height)
+    {
+        assert (dest != NULL);
+        // Make sure that the size is the same, reallocate if necessary
+        dest->allocate(width, height);
+
+        if (dest->width == -1) {
+            printf("ERROR: PlanarRGBData::copyData >>> allocation failed!\n");
+            return;
+        }
+
+        for (int i = y, j = 0; i < y + height; ++i, ++j) {
+            memcpy (dest->r(i) + x, r(j), width * sizeof(T));
+            memcpy (dest->g(i) + x, g(j), width * sizeof(T));
+            memcpy (dest->b(i) + x, b(j), width * sizeof(T));
+        }
+    }
+
     void rotate (int deg)
     {
 
@@ -1342,6 +1378,23 @@ public:
         memcpy (dest->data, data, 3 * width * height * sizeof(T));
     }
 
+    /** Copy the a sub-region of the data to another PlanarRGBData */
+    void copyData(ChunkyRGBData<T> *dest, int x, int y, int width, int height)
+    {
+        assert (dest != NULL);
+        // Make sure that the size is the same, reallocate if necessary
+        dest->allocate(width, height);
+
+        if (dest->width == -1) {
+            printf("ERROR: PlanarRGBData::copyData >>> allocation failed!\n");
+            return;
+        }
+
+        for (int i = y, j = 0; i < y + height; ++i, ++j) {
+            memcpy (dest->r(i) + x, r(j), 3 * width * sizeof(T));
+        }
+    }
+
     void rotate (int deg)
     {