63 lines
2.5 KiB
Plaintext
63 lines
2.5 KiB
Plaintext
This will have some developer info.
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Currently used versions of dependencies:
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- libboost-1.49.0.1
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-- Documentation: http://www.boost.org/doc/libs/
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- libglibmm 2.35.9
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-- Documentation: https://developer.gnome.org/glibmm/2.35/
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- libglib 2.36.0
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-- Documentation: https://developer.gnome.org/glib/2.36/
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-- Deprecation notices: https://developer.gnome.org/glib/2.36/glib-Deprecated-Thread-APIs.html
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- libncurses 5.9
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-- Documentation: http://www.tldp.org/HOWTO/NCURSES-Programming-HOWTO/
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Frame format (frame=all infos to display the windows and segments)
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The frames are separated in UDP packets, so each packet has one frame
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Original format (this will be changed, see below):
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This is set in frameserver/defines.h
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* byte "abcdefghij" (10 chars)
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* byte z (indicates z level. 1=the most backwards)
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* byte '\n'
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* byte windows (width*height*channels) (so this starts 12 bytes from beginning)
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* byte segments (displays*segments*channels)
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Proposed new format, to be able to treat a stream of frames
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* byte "s2l\n"
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* byte windows per row (i.e. max X) in ASCII. in our case 12 => '<'
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* byte rows (i.e. max Y) in ASCII. in our case 8 => '8'
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* byte displays per row (usually same as windows per row) '<'
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* byte disprows (how many rows of 7 segment displays). In our case always '1'
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* byte segments per display (can be 7,8,14 ... depending on the hardware)
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* byte reserved (future use) currently always set to 0x20 ' '
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* byte z (indicates z level. 1=the most backwards) this is in binary...
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* byte '\n'
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* byte windows (channels*width+1)*height (so this starts 12 bytes from beginning)
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* byte segments displays*(channels*segments+1)*disprows
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channels??? Is always 4, means you send RGBA values. If the display is just
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greyscale the output from frameserver to display should be quantized
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accordingly. Best done in the display code. E.g. the building is B/W, then
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render RGB to HUE in the display client. The html simulator could output
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it as is, or do the conversion via a toggle button on the webpage.
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+1??? Well looks like in the frameserver code and in the clients the
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"lines" of each frame are separated by a nice \n character.
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And the 7 segment displays are each separated by a \n
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Oh so why not? Let's have it display nicely on screen if dumped in
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a network trace.
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so size max of a UDP packet is
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(full rgba) : 10+2+(4*12+1)*8+12*(4*8+1)*1=800 bytes
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Note that the current code needs change of HASH define to
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"s2l\n<8<18 "
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as that value is always checked to validate a correct frame
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and the code does not use the infos to size buffers (else: buffer overrun hack)
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