1. Overlay (& Libraries )
Ron Ravid & Grégoire Sage
October 2nd 2014

2. Presented by:
RRoonn
RRaavviidd
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SSaaggee
HHoopp PPiicckkeerr,,
PPeebbbbllee--aauuttooccoonnffiigg

3. Today & Tomorrow
 Today: General Overview
 Tomorrow: Details on implementation
 Farther information:
- GitHub – ron064 – PPOSDemo
- GitHub – gregoiresage – pebble-demos

4. Existing examples
Current
 Finally
 Display Generator
 PPOSDemo
(GitHub: Ron064)
 Pebble Demos
(GitHub: gregoiresage)
Near Future
 Earth (map)
 Timely
 Pebble Bike

5. Display Generator:
Composing various watchfaces by user selection

6. Libraries (1/3) - code
It is not complicated to build a Library.

7. Libraries (2/3) - Advantage
 Sharing libraries : Advantage to pebble over
other platforms.
 Focus on your strength
 A company may pay developer for his library
in commercial usage.

8. Libraries (3/3) - usage
 A watchface built as a library, can be used
by different developers.
 Application can include several libraries from
different developers
 Examples
- Activity tracker
- Gesture recognition
- Several remote control systems together
- Components like battery/communication.

9. Overlay
 What is it?
 Overlay allows putting more things together

10. Overlay memory map example

11. Basic concept of overlay
 Loading code or code+data before usage,
 Attention to init/deinit
 Care for memory usage. (overlay size)
 Several adjustments are needed

12. Overlay – build script
 Overlay requires special build script.
 Currently automatic triple compilation

13. Overlay – Future ToDo
 Add debug option,
 Improve build process

14. Next
 Information is available online
- GitHub – ron064 – PPOSDemo
- GitHub – gregoiresage – pebble-demos
 Workshop Tomorrow
 Open source projects that will be converted
- Timely
- Pebble Bike