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Fix protocol description

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doc/protocol.txt: Replaced type names with architecture independent aliases, fixed 'type' size which is a byte, and recorded that it uses "big endian", or "network byte order" convention.
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anatoly techtonik 2014-01-06 20:03:14 +03:00
parent c4e337ae0b
commit 51d862cf45
1 changed files with 12 additions and 13 deletions
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15
doc/protocol.txt
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@ -1,4 +1,3 @@
Network protocol used by GfxTablet Network protocol used by GfxTablet
@ -8,17 +7,17 @@ Version 1
GfxTablet app sends UDP packets to port 40118 of the destination host. GfxTablet app sends UDP packets to port 40118 of the destination host.
Packet structure: Packet structure, uses network byte order (big endian):
9 octets "GfxTablet" 9 bytes "GfxTablet"
1 ushort version number 1 word version number
1 ushort type: 1 byte 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 ushort x (using full range: 0..65535) 1 word x (using full range: 0..65535)
1 ushort y (using full range: 0..65535) 1 word y (using full range: 0..65535)
1 ushort pressure (using full range 0..65535, 32768 == pressure 1.0f on Android device) 1 word pressure (using full range 0..65535, 32768 == pressure 1.0f on Android device)
when type == button event: when type == button event:
1 byte number of button, starting with 0 1 byte number of button, starting with 0