#1007 After zooming, pan gets reset upon fullscreen on/off and rotation and stop/play; zoom gets broken; subtitles off screen

[cheater]

If I zoom a video in windowed mode and enter fullscreen mode, now the video is zoomed to a different degree.

If I zoom a video in any mode and then pan it (move the visible slice around to eg look at the corner of the video) and perform any of the following actions, the pan position gets reset to the center of the video. The following actions do it:

• enter or exit full screen mode
• zoom again
• reset zoom
• stop video and play it again
• rotate or mirror

In each of those cases, what should happen is that the current center of the viewport should be calculated before the action is performed, then the action should be performed and then the center of the pan should be restored. So for example, when going from windowed to full screen, check the current center in terms of the video's coordinates, go to full screen, and then pan so that the current center is at the same coordinates again.

Also the zoom should work differently when going to/from full screen but I don't know what it's doing currently so I can't suggest what might be broken.

Finaly, when zooming and panning, subtitles should stay the same size and location within the viewport of the movie. It makes no sense to let them scroll off screen.

I've included the following files in the attached screenshots.zip:

• original.jpg - a screenshot of the video without zooming in. This is done with the screenshot function of SMPlayer
• zoomed in windowed.jpg - I zoomed in a few times and took a screenshot using the windows screenshot tool of the SMPlayer window
• zoomed in after going fullscreen.jpg - I pressed enter to go to full screen mode and used the windows screenshot tool again

As you can see, there's no really good logic about what the video zoom is doing. Neither the vertical slice nor the horizontal slice are the same between the two views:

• the vertical slice in windowed mode spans between just under the guard's eyes (at the top of the video) and just under the button on his shirt (at the bottom of the video)
• the vertical slice in full screen mode spans between far above the guard's eyes, and far below the shirt button
• the horizontal slice in windowed mode shows a lot more of the wall on the left and shows the inmate's arm on the right
• the horizontal slice in full screen mode crops the wall on the left and hides the inmate's arm on the right
• the original version is different from either windowed zoom or full screen zoom

it just doesn't make any sense.

[cheater]

The screenshots can also be viewed here: https://imgur.com/a/llqNEKR