riched20: add tests for EM_FORMATRANGE

[Paul Vriens]

James McKenzie wrote:
> Lei Zhang wrote:
>> On Fri, Mar 13, 2009 at 12:01 PM, Paul Vriens
>> <paul.vriens.wine at gmail.com> wrote:
>>   
>>> Lei Zhang wrote:
>>>     
>>>> Hi,
>>>>
>>>> In my last attempt, I submitted Troy Rollo's EM_FORMATRANGE
>>>> implementation and with my test cases. I'm not sure what was wrong
>>>> with the implementation, but the test cases should be ok.
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>>
>>>>
>>>>       
>>> Hi Lei,
>>>
>>> Pretty old patch. (June 2007)
>>>
>>> I just moved some of my VMware 'boxes' to my new laptop (laptop resolution
>>> 1024x800) and I suddenly had some failures. The resolution that VMware can
>>> use (with all those borders and the sidebar) is 1044x574. Running the tests
>>> fullscreen makes them pass again.
>>>
>>> You can replicate this by playing with the screen resolution. The smaller
>>> the resolution the more test failures.
>>>
>>> Any idea where I need to look?
>>>
>>> --
>>> Cheers,
>>>
>>> Paul.
>>>
>>>     
>> Is this on Windows in VMWare? I'm not getting any riched20 crosstest
>> failures here at 800x600.
>>
>>
>>
>>   
> Interesting that this should fail on a VMWare workstation setup.  The
> tests are pretty straightfoward.
> 
> Also, I have not worked on this due to other pressures of life.  Would
> someone like to take this over and finish it?  This would solve a couple
> of open bug reports and fix some complaints about text rendering.
> 
> James McKenzie
> 
> 
> 
As said before, this issue can be seen on both VMware and real boxes. It's much 
easier of course to play around with resolutions on VMware.

I'm currently trying loads of different resolutions to see if there is some 
logic. I do see that when I'm reducing just the horizontal resolution for 
example that the result of the EM_FORMATRANGE message changes at certain 
intervals (no logic found yet though).

The number that keeps coming back is '15' :

Hor	Vert	EM_FORMATRANGE

1040	800	20
937	800	16
832	800	15
712	800	14
652	800	13
547	800	12
517	800	9
412	800	7
382	800	6

The difference between the horizontal resolution when the results change is 
always a multiple of 15 (can't check the first one as 20 is the maximum returned).

The same behavior can be seen with a vertical resolution of 600:

Hor	Vert	EM_FORMATRANGE

1238	600	20
1222	600	18
1057	600	16
1012	600	15
937	600	9
547	600	7
517	600	6

And with a horizontal resolution of 979 (yeah I know):

Hor	Vert	EM_FORMATRANGE

979	724	20
979	712	15
979	472	7

So any idea about that number '15'? Maybe once I've figured out where that comes 
from the logic makes more sense.

-- 
Cheers,

Paul.