Re: [hatari-devel] Hatari screen options (was: Hatari manual.html)

[David Savinkoff <dsavnkff@xxxxxxxxx>]

Hi Eero,

Previously, I had made the comments (below) and mentioned
that Hatari regressed. Hatari probably has not regressed.

I believe that I would get the same results if I used
the same method to discover video modes as I did with
my CRT monitor years ago.

The reason is that Hatari requests and gets the 416
when providing 416x276 or 416x288 etc.
Then the monitor then selects the best it can do.
(416x312 for CRT // 416x312 scaled to 832x624 for LCD)

When requesting 400x300:
resolution limit:
        400 x 300
limited resolution:
        1 * (32 + 320 + 32) x (29 + 200 + 47)
        = 384 x 276 (+ statusbar)
SDL screen request: 384 x 276 @ 0 (windowed)
SDL screen granted: 384 x 276 @ 32
Then the monitor then selects the best it can do.
(400x300 for CRT // 400x300 scaled to 800x600 for LCD)

It looks like Hatari could be improved though.
Hatari should be primed with standard video modes so
that it can make smarter requests. My suggestion is
to prime Hatari with the xrandr results that I gave
for my LCD monitor (unless you can find a more
inclusive list). Note that the important video modes
are the low resolution modes, or multiples thereof.



(below)
**** EXHIBIT (1) *************************************
I asked for 416x312 and got 416x276 because
Hatari has regressed from when I tested years ago on
my CRT monitor (by laboriously incrementing through
sequential numbers with the Hatari SDL GUI to observe
video modes. Notably, being able to see when 400x300
and 416x312 popped up).

Hatari used to provide the resolution requested with
the status bar disabled. Now the user-requested
resolution is ignored and replaced with something else.

I did not notice because the visual impact is insidious.

******************************************************
!!!   SURPRISE   !!!

I ask for 416x312
Hatari requests:
 SDL screen request: 416 x 276 @ 0 (windowed)
 SDL screen granted: 416 x 276 @ 32
I say WRONG and WRONG
Monitor says (on screen independently):
 832x624
I get a full screen at 416x312 (see xrandr below)
*******************************************************

$ xrandr
 SZ:    Pixels          Physical       Refresh
*0   1280 x 1024   ( 361mm x 292mm )  *60  
 1   1280 x 960    ( 361mm x 292mm )   60  
 2   1280 x 800    ( 361mm x 292mm )   75   70   60  
 3   1280 x 768    ( 361mm x 292mm )   85   75   70   60  
 4   1280 x 720    ( 361mm x 292mm )   85   75   70   60  
 5   1152 x 864    ( 361mm x 292mm )   75   70   60  
 6   1024 x 768    ( 361mm x 292mm )   75   70   60   85  
 7    832 x 624    ( 361mm x 292mm )   75  
 8    800 x 600    ( 361mm x 292mm )   75   72   60   56   85  
 9    720 x 400    ( 361mm x 292mm )   70   85  
 10   640 x 480    ( 361mm x 292mm )   75   73   67   60   85  
 11   640 x 400    ( 361mm x 292mm )   85  
 12   640 x 350    ( 361mm x 292mm )   85  
 13   640 x 360    ( 361mm x 292mm )   85   75   70   60  
 14   416 x 312    ( 361mm x 292mm )   75  
 15   400 x 300    ( 361mm x 292mm )   85   75   72   60   56  
 16   320 x 240    ( 361mm x 292mm )   85   75   73   60  
 17   360 x 200    ( 361mm x 292mm )   85  
 18   320 x 200    ( 361mm x 292mm )   85  
 19   320 x 175    ( 361mm x 292mm )   85  
Current rotation - normal
Current reflection - none
Rotations possible - normal
Reflections possible - none

xrandr output looks very reasonable. Resolutions
416x312 and less appear undocumented for the LCD
monitor. Maybe the R100 [Radeon 7200 / All-In-Wonder]
video card does something.

Sincerely,
David Savinkoff