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Problem in rotating a PNG image

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hi everybody i am developing game for mobile i am having problem with PNG image, i have downloaded some images from net,if i rotate this image to some angle lets say 5 degree, it doesnt works , it throws and exception, if i rotate it to 180 degree it works well. WHY?? how i can i solve this problem of rotating image? bye

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What is the exception? The pixels may be going out of bounds- try and think where each corner of the image is ending up once it has been rotated.

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Exception is
java.lang.IllegalArgumentException

rotation of image changes the dimension of image, but if i rotate it to 180 degree then it works well (as the dimensions doesnt change)

why the change in dimension of PNG image throws an exception?


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