Re: [hatari-users] [hatari-devel] hatari & widescreen

[Eero T. <oa...@he...>]

Hi,

On Monday 25 February 2008, Tony Smolar wrote:
> I recently got a widescreen LCD monitor, and I haven't been able to get
> hatari to behave the way I would like.     I prefer to run hatari in
> fullscreen.
>
> First off,  I have an NVIDIA card, and the NVIDIA drivers have the
> option to "preserve aspect ratio" so that most fullscreen programs that
> use non-widescreen resolutions display with black bars on the sides.
> This is the way I'd like it,  but it seems that hatari in mono 640x400
> mode DOES stretch to the full screen and doesn't preserve aspect.  Does
> this try to use a real 640x400 mode?

Yes.  Hatari screen.c::Screen_SetResolution() does just:
        sdlscrn = SDL_SetVideoMode(Width, Height, BitCount, sdlVideoFlags);

You would need to add code using this:
----------------------------
/*
 * Return a pointer to an array of available screen dimensions for the
 * given format and video flags, sorted largest to smallest.  Returns
 * NULL if there are no dimensions available for a particular format,
 * or (SDL_Rect **)-1 if any dimension is okay for the given format.
 *
 * If 'format' is NULL, the mode list will be for the format given
 * by SDL_GetVideoInfo()->vfmt
 */
extern DECLSPEC SDL_Rect ** SDLCALL SDL_ListModes(SDL_PixelFormat *format, 
Uint3 2 flags);
------------------------------


> Maybe, since that mode isn't 
> exactly.  4:3, the driver doesn't bother to preserve aspect?
>
> Also, in low-res color,  the aspect is preserved, but the right border
> doesn't show up.    What mode does this use?

What modes your screen supports?


> (also if I turn off 
> borders, then it is stretched to the full screen)
>
> I am not sure what the best approach to solve these is,  one possibility
> is a command line option to tell hatari that you have a widescreen
> monitor,  then hatari could request a widescreen mode, and center the
> display itself (but could it do this without a huge amount of
> reprogramming?)   Another option is to have the option to request
> standard modes like 640x480 instead of 640x400, and let the driver deal
> with the aspect.   Again, I don't know if hatari can do this easily.

I think most of the mono applications should work if you give Hatari
suitable VDI resolution with the --vdi-width and --vdi-height options.
Even many of the games work if you keep the display width at 640.


> But widescreen monitors are apparently the future.  They make very few
> 4:3 monitors anymore, and some of us can't stand to look at stretched
> images :)     And I'm not sure if every graphics driver has the
> 'preserve aspect ratio' option that NVIDIA has.   So hopefully hatari
> can have an option to adjust to this.


	- Eero