[SDL] Failed to open vchiq device on RPi

Andreas Falkenhahn andreas at falkenhahn.com
Mon Sep 12 11:26:34 PDT 2016


Hi Alex,

On 12.09.2016 at 19:54 Alex Barry wrote:

> Out of curiosity, why SDL_PumpEvents if you are calling SDL_PollEvent?

> On Mon, Sep 12, 2016 at 1:46 PM, Andreas Falkenhahn <andreas at falkenhahn.com> wrote:

> On 12.09.2016 at 18:08 Alex Barry wrote:
>  
 >> I'm going to get by Pi2 back up and running this weekend, so I
 >> don't mind taking a peek at what's going on.  Do you have your
 >> project online anywhere or are you just using a bare-bones sort of
 >> project (ie single fullscreen window taking input.)?
>  
>  To make this easier I've now written a minimal sample program which
>  shows the issue. Here it is:
>  
>  #include <SDL.h>
>  
>  int main(int argc, char *argv[])
>  {
>          SDL_Window *window;
>          SDL_Renderer *renderer;
>          SDL_Texture *texture;
>          SDL_Event se;
>          int quit = 0;
>          int bufferwidth = 1920, bufferheight = 1080;
>          char *pixbuf = malloc(bufferwidth * bufferheight * 4);
>  
>          SDL_Init(SDL_INIT_VIDEO);
>          SDL_VideoInit("RPI");
>  
>          window = SDL_CreateWindow("Foo", 0, 0, bufferwidth,
> bufferheight, SDL_WINDOW_FULLSCREEN);
>          renderer = SDL_CreateRenderer(window, -1, 0);
>          texture = SDL_CreateTexture(renderer,
> SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, bufferwidth, bufferheight);
>  
>          memset(pixbuf, 0, bufferwidth * bufferheight * 4);
>          SDL_UpdateTexture(texture, NULL, pixbuf, bufferwidth * 4);
>          SDL_RenderCopy(renderer, texture, NULL, NULL);
>          SDL_RenderPresent(renderer);
>  
>          SDL_ShowWindow(window);
>          SDL_RaiseWindow(window);
>  
>          while(!quit) {
>  
>                  SDL_PumpEvents();
>  
>                  while(SDL_PollEvent(&se)) {
>                          if(se.type == SDL_MOUSEBUTTONDOWN) quit = 1;
>                  }
>          }
>  
>          SDL_DestroyTexture(texture);
>          SDL_DestroyRenderer(renderer);
>          SDL_DestroyWindow(window);
>  
>          SDL_Quit();
>  
>          free(pixbuf);
>  
>          return 0;
>  }
>  
>  I've also prepared a package containing a ready-to-run binary as well as my
>  build of SDL 2.0.4 for the Pi. This can be downloaded from here:
>  http://www.softwarefailure.de/tmp/sdltest.tar.gz
>  
>  The archive also contains a build script.
>  
>  Any help appreciated.
>  

>  --
>  Best regards,
>   Andreas Falkenhahn                            mailto:andreas at falkenhahn.com
>  
>  



-- 
Best regards,
 Andreas Falkenhahn                            mailto:andreas at falkenhahn.com



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