Rotating screen to "Book mode"

[NelsonRosenberg]

I haven't seen the Desmume rotation option in core options. Some games need it to play in 'book mode', like Hotel Dusk.

Retroarch rotation doesn't do the same thing, I tried and it squishes the picture.

Isn't it implemented or am I missing something?

Thank you.

[andres-asm]

Then it should be fixed in RetroArch not here. That's the whole idea, implement the features in the frontend once instead of re-implementing everything in every core.

Most likely you can use RetroArch rotation and a custom aspect ratio.

[Nine-H]

rotating in retroarch breaks touch input.

edit: back in 2018, still sucks, here's the retroarch bug

https://github.com/libretro/RetroArch/issues/6045

[0x90shell]

Seems both the Desmume and MelonDS standalone support rotation. Perhaps a screen layout like "left/right - bookstyle" would be the easiest way to implement in a per game config? Its a pain, but currently you can set video rotation in manual config change via file or RA video change. It has to be set on a per game cfg file or switching video/aspect settings manually.

[Espiga5]

Personally I think is better a implementation of rotation per core than rotation in retroarch general settings, becouse this way you can save rotation options for a specific game and not going to general settings and change rotation each time you play a game that needs it. Desmume should implement a rotation option as said above.