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Code Issues Releases Wiki Activity

use standard-width types and remove pressure ambiguity in protocol documentation

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Jarrad Whitaker 2015-11-27 23:02:18 +11:00
parent 5865d3c81e
commit bf674e5203
1 changed files with 13 additions and 13 deletions
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18
doc/protocol.txt
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@ -2,7 +2,7 @@ Network protocol used by GfxTablet
Version 1 Version 2
--------- ---------
GfxTablet app sends UDP packets to port 40118 of the destination host. GfxTablet app sends UDP packets to port 40118 of the destination host.
@ -10,17 +10,17 @@ GfxTablet app sends UDP packets to port 40118 of the destination host.
Packet structure, uses network byte order (big endian): Packet structure, uses network byte order (big endian):
9 bytes "GfxTablet" 9 bytes "GfxTablet"
1 word version number 1 unsigned int16 version number
1 byte type: 1 byte event type:
0 motion event (hovering) 0: motion event (hovering)
1 button event (finger, pen etc. touches surface) 1: button event (finger, pen etc. touches surface)
1 word x (using full range: 0..65535) 1 unsigned int16 x (using full range: 0..65535)
1 word y (using full range: 0..65535) 1 unsigned int16 y (using full range: 0..65535)
1 word pressure (using full range 0..65535, 32768 == pressure 1.0f on Android device) 1 unsigned int16 pressure (accepting full range 0..65535, but will clip to 32768 == pressure 1.0f on Android device)
when type == button event: when type == button event:
1 byte number of button, starting with 0 1 signed int8 number of button, starting with 0
1 byte button status: 1 byte button status:
0 button is released ("up") 0 button is released ("up")
1 button is pressed ("down") 1 button is pressed ("down")