Re: [PATCH] __draw_transparent_text__ (osd.py)

On 05/07/2010 01:13, Florent Kaisser wrote:
> Hello,
>
> Problem : The "dim text" feature slow the tv listening scroll
>
> Why ? matrix calculation with two imbricate For loop in
> __draw_transparent_text__ (osd.py)
>
> Solution : use NumPy to acdelerate the matrix calculation
>
> Proposed patch for osd.py :
>
> 43a44
>    
>> import numpy
>>      
> 1148,1149d1148
> <              opaque_mod = float(1)
> <              opaque_stp = opaque_mod/float(pixels)
> 1155,1159c1154,1158
> <              for x in range(max(w-pixels, 0), w):
> <                  for y in range(0, h):
> <                      if alpha[x, y] != 0:
> <                          alpha[x, y] = int(alpha[x, y] * opaque_mod)
> <                  opaque_mod -= opaque_stp
> ---
>    
>>              alpha *= numpy.row_stack(
>>                       [numpy.ones( (max(w-pixels, 0),h) )]
>>                       + [numpy.linspace(mod,mod,num=h)
>>                           for mod in numpy.linspace(1,0,num=pixels) ] )
>>
>>      
> Best regards,
>
> Florent Kaisser.
>    
Hi Florent,

Many thanks for the patch. I'm looking forward to testing it out. In the 
mean time can you submit it to the bug tracker? 
http://sourceforge.net/tracker/?atid=446895&group_id=46652

John

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