ExIf rotation makes no rational or logical sense. Below is code that rotates an image based on its present position in increments of one quarter turn (90 degrees) at a time.

private
int rotateImg(int currentOrientation, int rotate)

{

int next = 0;

int prev = 0;

switch (currentOrientation)

{

//1,6,3,8

case 0: next = 6; prev = 8; break;

case 1: next = 6; prev = 8; break;

case 6: next = 3; prev = 1; break;

case 3: next = 8; prev = 6; break;

case 8: next = 1; prev = 3; break;

}

if (rotate == 1)

{

return next;

}

else
if (rotate == -1)

{

return prev;

}

else

{

return next;

}

}