Re: master 8b7aaf3e56: Speed up GIF animations

[Lars Ingebrigtsen]

Po Lu <luangruo@yahoo.com> writes:

>> +  int cache_image_size = width * height * ximg->bits_per_pixel / 8;
>
> Emacs_Pix_Container is an opaque type that can be typedefed to a variety
> of things on different platforms.
>
> You cannot directly refer to bits_per_pixel, which only exists on X.
> This will probably break if bits_per_pixel is not a multiple of 8 as
> well.  It can be any random value on X Windows, and might not even exist
> if the image format is not ZPixmap.

Right.

> What is the temp field for?  Is it for storing bitmap data?  If so, it
> should just be a bitmap set using the PUT_PIXEL macro.

I want to copy the bitmap that we've already computed in an efficient
way.  PUT_PIXEL would be way too slow.  Any ideas?

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   bloggy blog: http://lars.ingebrigtsen.no