Rotate image has a bug?

[yswang0927]

Hi, I used photon to rotate an image(256x256px) and found that the image size is correct when rotated at 90,180,270 degrees, but when rotated at other angles (e.g. 30, 45, 60...). The size of the image does not seem to be correct, the image size is larger, and there is a lot of white space, is this a bug?