[SDL] SDL_BlitSurface takes longer on 16 Bpp?

[Stephane Marchesin]

Manuel García Cabrera wrote:
> Ulrich Eckhardt escribió:
>   
>> On Saturday 05 May 2007 06:15:01 Manuel García Cabrera wrote:
>>     
>>> Why is that? Same resolution and less bytes per pixel are taking longer
>>> to blit. Like 7ms on 32 bpp and 15ms on 16bpp...
>>>       
>> An x86 processor takes longer if you force it to 16 bit accesses instead of 
>> the native 32 bits. For your case, it might be semi-forced to do that if the 
>> surfaces are misaligned. That said, the only info you gave is the target 
>> format, what is still missing is the source format and instructionset your 
>> CPU is using.
>>
>> Uli
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>>     
> I receive pixel data of a 16bpp pixel and use SDL_CreateRGBSurfaceFrom.
> That would be the source. I blit it to a surface I setted the video mode
> to 32 bits, but tried setting it to 16bits too... I have a C2D E6600
>   
Use SDL_DisplayFormat, luke.

Stephane