Merge remote-tracking branch 'origin/2.4' into merge-2.4

Conflicts:
	doc/tutorials/definitions/noContent.rst
	doc/tutorials/gpu/gpu-basics-similarity/gpu-basics-similarity.rst
	doc/tutorials/introduction/android_binary_package/dev_with_OCV_on_Android.rst
	doc/tutorials/introduction/how_to_write_a_tutorial/how_to_write_a_tutorial.rst
	modules/core/include/opencv2/core/core.hpp
	modules/core/include/opencv2/core/internal.hpp
	modules/core/include/opencv2/core/version.hpp
	modules/gpu/CMakeLists.txt
	modules/highgui/perf/perf_output.cpp
	modules/highgui/test/test_video_io.cpp
	modules/ocl/include/opencv2/ocl/ocl.hpp
	modules/ocl/perf/main.cpp
	modules/ocl/src/hog.cpp
	modules/ocl/src/initialization.cpp
	modules/ocl/src/moments.cpp
	modules/ocl/src/opencl/moments.cl
	modules/ocl/test/main.cpp
	modules/ocl/test/test_moments.cpp
	modules/python/test/test.py
	modules/ts/include/opencv2/ts/ts_perf.hpp
	modules/ts/src/precomp.hpp
	modules/ts/src/ts_perf.cpp

modules/highgui/include/opencv2/highgui/highgui_c.h

@@ -559,9 +559,11 @@ CVAPI(int)    cvGetCaptureDomain( CvCapture* capture);
 /* "black box" video file writer structure */
 typedef struct CvVideoWriter CvVideoWriter;
 
+#define CV_FOURCC_MACRO(c1, c2, c3, c4) (((c1) & 255) + (((c2) & 255) << 8) + (((c3) & 255) << 16) + (((c4) & 255) << 24))
+
 CV_INLINE int CV_FOURCC(char c1, char c2, char c3, char c4)
 {
-    return (c1 & 255) + ((c2 & 255) << 8) + ((c3 & 255) << 16) + ((c4 & 255) << 24);
+    return CV_FOURCC_MACRO(c1, c2, c3, c4);
 }
 
 #define CV_FOURCC_PROMPT -1  /* Open Codec Selection Dialog (Windows only) */

modules/highgui/include/opencv2/highgui/ios.h

@@ -0,0 +1,49 @@
+
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                          License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include "opencv2/core/core.hpp"
+#import "opencv2/highgui/cap_ios.h"
+
+UIImage* MatToUIImage(const cv::Mat& image);
+void UIImageToMat(const UIImage* image,
+                         cv::Mat& m, bool alphaExist = false);