Rotate the n*n matrix by 90 degrees

Given an image represented by an NxN matrix, where each pixel in the image is 4 bytes, write a method to rotate the image by 90 degrees. Can you do this in place?

Example

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1 2 3 4 5 6 7 8 9 10 11 12

Example 1                          Example 2 INPUT    >>     OUTPUT      |         INPUT    >>  OUTPUT                              | 4                           |             4                                                                     | 1 2 3 4        1 1 1 1      |     11 12 13 14      41 31 21 11                             | 1 2 3 4        2 2 2 2      |     21 22 23 24      42 32 22 12                             | 1 2 3 4        3 3 3 3      |     31 32 33 34      43 33 23 13                             | 1 2 3 4        4 4 4 4      |     41 42 43 44      44 34 24 14

http://k2code.blogspot.in/2014/03/rotate-n-n-matrix-by-90-degrees.html
http://www.geeksforgeeks.org/turn-an-image-by-90-degree/
http://www.programcreek.com/2013/01/leetcode-rotate-image-java/