Question to various rotate

by XnTriq (Posted Sun Jun 26, 2016 8:45 pm)

Download Karl02's suite of test images (exif-orientation-testimages-v2.rar).
Extract F2_5.jpg (EXIF orientation: 5 = left/top).
Remove the write protection attribute from F2_5.jpg.
Make a copy of F2_5.jpg.
Rename F2_5.jpg to cmd_rotate90.jpg,
and Copy of F2_5.jpg to cmd_lrotate90.jpg.
Start XnViewMP.
Make sure the following settings are activated:
- General» File operations» Keep original date/time
  - Lossless transformations
- Browser» Misc.» Rotation
  - Change EXIF orientation ONLY (if possible)
  - Use lossless rotation (if possible)
Select the thumbnail of cmd_lrotate90.jpg in the browser and hit Ctrl+Shift+R (= cmd_lrotate90).
1. Warning message: “JPEG lossless operation will modify original file(s), and may remove some unused pixels (width and height must be multiple of 8 pixels)! Do you want to continue?”
2. The image is rotated 90° clockwise.
3. The dimensions are changed from W255×H239 to W224×H255.
4. The EXIF orientation flag is reset to 1 (top/left).
5. The file's timestamp remains the same.
Select the thumbnail of cmd_rotate90.jpg in the browser and click the Rotate clockwise (= cmd_rotate) button on the main toolbar.
- No changes are made to the file
  Expected behavior: Steps 8a through 8d