Article: Functional image processing in D

[ponce]

On Sunday, 23 March 2014 at 08:22:32 UTC, Vladimir Panteleev 
wrote:
> I'm not familiar enough with vector instruction sets of current 
> CPUs to answer this confidently. E.g. if there exists an 
> integer vector multiply-and-add operation, then that could be 
> used for fast software alpha blending. That operation's 
> restrictions would dictate the optimal memory layout of the 
> image. E.g. if the operation requires that the bytes to 
> multiply and add are contiguous in memory, then it follows that 
> the image should be represented with each channel as a separate 
> sub-image.

There is the PMADDWD instruction that can be used for 8-bit 
blending. I don't think it requires a particular layout from the 
implementation, blending would probably be dominated by memory 
accesses.