Based on Slack conversation, the following changes:
- lovr.event.quit("restart") no longer supported
- lovr.event.quit no longer takes restart "cookie"
- When lovr.event.restart() called, lovr.quit() is not called, instead lovr.restart() is called
- Value returned from lovr.restart(), when called, becomes the cookie
- lovr.event.quit takes the lovr.event.quit() return code as an argument
lovr.run() is unchanged, it still returns (exit code | "restart", cookie).
- There is now just one "playing" state.
- Instead of rewind, use :seek(0).
Note that now there is no way to resume or rewind all tracked sources.
This can be improved in the future if there's a need for it, probably
using variadic or table-based variants of the audio module functions.
Lua was happily compiling nil chunks and making them return empty
strings, which was not a good error experience in situations where
your file couldn't be loaded properly. Now we return nil plus an
error message, which matches LOVE and other Lua conventions.
Unlike lovr.timer.getTime, this is the predicted time at which the
current frame will be displayed. It can be used in place of
lovr.timer.getTime for smoother animations. It's unclear if this
could be used for a suitable replacement for dt though.
Currently nobody returns data for them, though headset drivers could
start to provide poses estimated from the head pose and IPD info.
This also makes it easier to integrate eye tracking later.
The previous implementation relied on glShaderSource inferring source
lengths when the lengths weren't specified. This relies on the sources
being properly null-terminated, however, which isn't the case due to
file loading changes which now use pointer + length. This could cause
intermittent crashes.
Changing this on the shader side meant adding some extra arguments for
passing around shader source lengths. For most of the other cases, where
we're using string literals as the sources, we can just specify -1 as
the length, since OpenGL will calculate the string length for you any
time the length is negative.
