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Bug 4276 - No way to detect orientation flip on iOS
Summary: No way to detect orientation flip on iOS
Status: RESOLVED FIXED
Alias: None
Product: SDL
Classification: Unclassified
Component: events (show other bugs)
Version: don't know
Hardware: iPhone/iPod touch iOS 9
: P2 API change
Assignee: Sam Lantinga
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-09-27 13:04 UTC by Ryan David Sheasby
Modified: 2018-09-27 21:51 UTC (History)
1 user (show)

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Description Ryan David Sheasby 2018-09-27 13:04:21 UTC 
Hi team. I've run into a problem with Love2d(based on SDL obviously) on iOS. When you do an orientation flip(not a rotation from portrait to landscape, a flip from portrait to upside-down portrait or something like that), there is no event triggered from SDL. The only orientation-based event is SDL_WINDOWEVENT_RESIZED which is only triggered when changing dimensions i.e. portrait <-> landscape. This is a crucial missing functionality. This is especially problematic due to the fact that accelerometer data is constant meaning it does not get inverted when you flip the device. Hence an accelerometer-based driving game for example would have to be locked to a single orientation as wheen you flip the device the steering would be inverted.
Comment 1 Sam Lantinga 2018-09-27 21:51:36 UTC 
In SDL 2.0.9 you use the function SDL_GetDisplayOrientation(), and watch for the event SDL_DISPLAYEVENT to detect changes.

You can get a prerelease version here:
http://www.libsdl.org/tmp/SDL-2.0.zip

Cheers!