The SDL forums have moved to discourse.libsdl.org.
This is just a read-only archive of the previous forums, to keep old links working.

SDL Forum Index
SDL
Simple Directmedia Layer Forums
No available video device?
REVERSE


Joined: 30 Oct 2012
Posts: 10
Location: Russia
Post Posted: Sun Jul 14, 2013 6:11 pm
Hi all!

I'm using SDL 1.2 on Debian in VirtualBox with success for my project. But the new version can give a major improvement to it.
I've downloaded SDL2 tarball, extracted, made ./configure (with --prefix /usr); make; make install.

I'm trying to run some test program just with SDL_Init(SDL_INIT_VIDEO), but it gives me "No available video device" error.

But, when I run this program:
Code:

#include "SDL.h"

int main (int argc, char* argv[])
{
  int numdrivers = SDL_GetNumRenderDrivers();

  printf("Drivers count: %i\n");

  for (int i=0;i<numdrivers;i++)
  {
    SDL_RendererInfo drinfo;
    SDL_GetRenderDriverInfo(i, &drinfo);

    printf("Driver name: %s\n", drinfo.name);
  }
}


I get this result:
Drivers count: 2
Driver name: opengl
Driver name: software

What am I missing?
neoaggelos


Joined: 02 Jan 2013
Posts: 138
Post Posted: Sun Jul 14, 2013 6:31 pm
Unless I am missing something as well, the render drivers have "nothing" (???) to do with the video device. In SDL2, the Render API is kind of different from the "Display" API, which means that the render drivers are available, but something can be wrong with initializing your video device (screen).

The correct function is "SDL_GetNumVideoDrivers()", not "SDL_GetNumRenderDrivers()".

The docs state that this function returns the number of the video drivers SDL was compiled with, so it's possible that something could not be found from your configure script.

I might be way off here, but could it be the libXi issue?? Checking what is the version of 'libXi' could be of help in that case...
REVERSE


Joined: 30 Oct 2012
Posts: 10
Location: Russia
Post Posted: Sun Jul 14, 2013 7:13 pm
Thank you for your reply!

I've run the test code from http://sdl.beuc.net/sdl.wiki/SDL-1.3_SDL_GetNumVideoDrivers and got these results:

Driver x11 doesn't work.
Driver dummy works.

But the thing is that I use raw framebuffer, no x11. May be I must set something in ./configure part when compiling SDL2 to use it?
REVERSE


Joined: 30 Oct 2012
Posts: 10
Location: Russia
Post Posted: Sun Jul 14, 2013 7:34 pm
I've tested my SDL1.2 program, and by using SDL_VideoDriverName obtained, that my driver name is fbcon.

Is there any support in SDL2 for this driver?
neoaggelos


Joined: 02 Jan 2013
Posts: 138
Post Posted: Sun Jul 14, 2013 8:04 pm
REVERSE wrote:
I've tested my SDL1.2 program, and by using SDL_VideoDriverName obtained, that my driver name is fbcon.

Is there any support in SDL2 for this driver?


Do you mean ''DirectFB" ??? (I don't know for sure, that's the closest I found). If that is the case, then pass the option ''--enable-video-directfb'' when running configure:

<code>

./configure --enable-video-directfb ``` other flags ```
make ; make install

</code>

Also make sure that the required development files for directfb are installed; remember that SDL is a wrapper around os-specific features, so you need the original dev files.
No available video device?
Ryan C. Gordon
Guest
Post Posted: Sun Jul 14, 2013 10:32 pm
On 07/14/2013 03:35 PM, REVERSE wrote:
Quote:
I've tested my SDL1.2 program, and by using SDL_VideoDriverName
obtained, that my driver name is fbcon.

Is there any support in SDL2 for this driver?

We removed fbcon support in SDL2.

The DirectFB code might still work, and I think can talk to the kernel
fbcon drivers behind the scenes.

--ryan.



_______________________________________________
SDL mailing list

http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org