[vdr] [ANNOUNCE] vdr-osdteletext-0.5-pre1

Anssi Hannula anssi.hannula at gmail.com
Wed Mar 30 17:53:44 CEST 2005


Udo Richter wrote:
> Anssi Hannula wrote:
> 
>>The "Half page" (don't confuse with "zoom") function doesn't do anything
>>here.
> Feared that... ;)
> The new code tries to fit the half-height mode into existing OSD memory,
> but CanHandleAreas is too optimistic in calculating the memory size.
> I already calculate using 10 lines backup, but thats not enough obviously...
> 
> display.c, line 244:
>     // Add some backup
>     // CanHandleAreas is not accurate enough
>     if (Upper) {
>         Areas[0].y2=Areas[0].y2-10;
>     } else {
>         Areas[0].y1=Areas[0].y1+10;
>     }
> Try increasing the +/- 10 here...

The problem seems to be that it tries to find the largest mode possible 
with 3Bpp, and so it ends up using the full size as I have resized the 
OSD down ;)

>>The "change background" appears to work with xine, but not in my FF DVB
>>card.
> 
> 
> At least works for my card, without re-initializing the osd.
> 

Oops, sorry, works here too. Probably I looked too fast, as the osd 
blinked when using in earlier version

>>BTW, normal-height text has always been very flickering, even more when
>>resized to smaller size. Is there anything that could be done to avoid
>>that?
> 
> Probably interlaced trouble. With an OSD height of 506 lines, pixels
> will be same on even and odd frames. Anything with less lines will
> sometimes have 1-pixel thin lines, appearing only on one frame, causing
> it to flicker.

Thanks, I now use width 506 and height 358, and the text is much more 
readable :)

...where another question arises: Why doesn't the setup allow less than 
480 height? I edited setup.conf manually.


> 
>>Another BTW: couldn't it be possible to use multiple 2bpp drawing areas
>>with invidual intelligent palettes to have more colors than 2bpp mode
>>currently has?
> 
> 
> :) My thought. There's already an interface for different OSD areas with
> different color mappings, but no code to calculate best colors.
> Even better would be some really smart code that calculates optimized
> zone areas and uses 1bpp, 2bpp and 4bpp to get the maximum out of it.
> But this is a hard job to calculate...

I thought of that too, but it would indeed be complex to calculate the 
areas.

-- 
Anssi Hannula



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