[libcvd-members] libcvd/cvd vision.h

[Olaf Kähler]

CVSROOT:        /sources/libcvd
Module name:    libcvd
Changes by:     Olaf Kähler <ok245>     10/03/29 13:26:05

Modified files:
        cvd            : vision.h 

Log message:
        added flipHorizontal()

CVSWeb URLs:
http://cvs.savannah.gnu.org/viewcvs/libcvd/cvd/vision.h?cvsroot=libcvd&r1=1.34&r2=1.35

Patches:
Index: vision.h
===================================================================
RCS file: /sources/libcvd/libcvd/cvd/vision.h,v
retrieving revision 1.34
retrieving revision 1.35
diff -u -b -r1.34 -r1.35
--- vision.h    1 Oct 2009 11:34:54 -0000       1.34
+++ vision.h    29 Mar 2010 13:26:05 -0000      1.35
@@ -24,6 +24,7 @@
 
 #include <vector>
 #include <memory>
+#include <algorithm>
 
 #include <cvd/vision_exceptions.h>
 #include <cvd/image.h>
@@ -435,6 +436,26 @@
   }
 }
 
+/// flips an image horizontally in place.
+template <class T> void flipHorizontal( Image<T> & in )
+{
+  int w = in.size().x;
+  int h = in.size().y;
+  std::auto_ptr<T> buffer_auto(new T[w]);
+  T* buffer = buffer_auto.get();
+  T * left = in.data();
+  T * right = left + w;
+  int row = 0;
+  while(row < h)
+  {
+    std::copy(left, right, buffer);
+    std::reverse_copy(buffer, buffer+w-1, left);
+    row++;
+    left += w;
+    right += w;
+  }
+}
+
 
 namespace median {
     template <class T> inline T median3(T a, T b, T c) {