Post by hillridge on Mar 18, 2019 6:00:37 GMT -8
How do you rotate a bitmap and have it display without clipping?
I understand how to rotate about the top left corner as is the default, and I understand how to rotate about the center, but in both cases a square bitmap will have portions clipped unless it is in 90° increments.
I know the display size also has to be increased to accommodate the new layout, but am missing the last piece. I assume it is a bitmap transform to shift the effective origin so that the rotated bitmap fits in the new "window", but I'm not quite sure how to calculate the transform needed.
I understand how to rotate about the top left corner as is the default, and I understand how to rotate about the center, but in both cases a square bitmap will have portions clipped unless it is in 90° increments.
I know the display size also has to be increased to accommodate the new layout, but am missing the last piece. I assume it is a bitmap transform to shift the effective origin so that the rotated bitmap fits in the new "window", but I'm not quite sure how to calculate the transform needed.