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dividuum / info-beamer

The Multimedia Presenter for Lua (for commercial projects, use info-beamer pi instead)
https://info-beamer.com/
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Add support for the raspberrypi #7

Closed uKev closed 11 years ago

uKev commented 11 years ago

I think a raspberrypi would be a great presentation device using info-beamer as it is so small and can just be attached to a beamer or a big TV.

The raspberrypi does support OpenGL ES 2.0 but hasn't a accelerated X11 driver.

Here are some details: http://benosteen.wordpress.com/2012/04/27/using-opengl-es-2-0-on-the-raspberry-pi-without-x-windows/ http://hackaday.com/2012/07/06/opengl-on-the-raspi/

How difficult would it be to add the functionality to info-beamer to use the display directly instead? The GL Calls would be mostly the same, do we just have to replace the window surface it's draws to?

dividuum commented 11 years ago

I started porting to Raspberry Pi. Fonts, shaders or videos are not working at the moment. I also have some problems with blending. I'll continue with the port next year. Hopefully there will be first version out in january.

uKev commented 11 years ago

Oh that is great! Thanks for your fast reply.

I've tried with fbdev and could get working some very basic stuff... But had very big performance issues. So I switched to luajit and increased some Limits:

-#define MAX_RUNAWAY_TIME 1 // sec
-#define MAX_PCALL_TIME  500000 // usec
+#define MAX_RUNAWAY_TIME 10 // sec
+#define MAX_PCALL_TIME  5000000 // usec

and reduced some penalties:

-#define NODE_CPU_BLACKLIST 60.0 // seconds a node is blacklisted if it exceeds cpu usage
+#define NODE_CPU_BLACKLIST 5.0 // seconds a node is blacklisted if it exceeds cpu usage

Is it possible to reduce node rendering rate to 1fps? That would be enough for my current use case...

Also can you share your current state in a raspberrypi branch so I can have a look at it?

dividuum commented 11 years ago

http://info-beamer.org/pi will be available soo.