[paragui-users] Windows and toggling full screen mode

[Steve McCrea]

Hi,

I'd like to be able to switch between full screen and windowed mode under 
Windows, while using a theme and layouts. I'm basically
using the dblbuffer example code.

If I start out with the PG_Application windowed, it runs fine, but when I call 
app.InitScreen() with SDL_FULLSCREEN in the flags,
two bad things happen.
1. The framerate drops from 30fps to 7fps and the screen flickers very badly.
2. If the bit depth for full screen is different from my desktop, drawing is 
corrupted.

If I start out with the PG_Application fullscreen, it runs fine, but when I 
call app.InitScreen() without SDL_FULLSCREEN in the
flags:
3. I get a crash [surface->format == 0xfeeefeee] which suggests that the 
surfaces are invalid.

Does anyone know what's going on?
It seems from (2) and (3) that I need to reload all the surfaces, but that's 
not easy when there's a layout loaded.
Any suggestions? Solutions?

Thanks,
Steve



My main function (trimmed down) is pasted below:

int main(int argc, char *argv[])

{

PG_Application app;

//int videoflags = SDL_SWSURFACE|SDL_FULLSCREEN;

int videoflags = SDL_SWSURFACE;

app.InitScreen(640, 480, 32, videoflags);

app.SetBulkMode(true);

app.LoadTheme("default");

app.LoadLayout("dblbuffer.xml");

app.SetCursor(app.GetTheme()->FindSurface("Pointer", "Pointer", "normal"));

app.ShowCursor(PG_CURSOR_SOFTWARE);

SDL_Surface *screen = app.GetScreen();

Uint32 background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);

bool done = false;

bool toggleFullScreen = false;

while ( !done )

{

    SDL_Event event;

    while (SDL_PollEvent(&event))

    {

        if (event.type == SDL_KEYDOWN

            && (event.key.keysym.mod & KMOD_ALT) > 0)

        {

            if (event.key.keysym.sym == SDLK_RETURN)

            {

                toggleFullScreen = true;

            }

            if (event.key.keysym.sym == SDLK_q)

            {

                done = true;

            }

        }

        app.PumpIntoEventQueue(&event);

    }

    SDL_FillRect(screen, NULL, background);

    PG_Widget::BulkBlit();

    SDL_Flip(screen);

    if (toggleFullScreen)

    {

        videoflags ^= SDL_FULLSCREEN;

        app.InitScreen(640, 480, 32, videoflags);

        screen = app.GetScreen();

        toggleFullScreen = false;

    }

}

return 0;

}