bug#33587: [PATCH v2] Add native image scaling (bug#33587)

[Paul Eggert]

On 1/10/19 11:42 AM, Alan Third wrote:
> I’ve pushed this to master as‐is. If nobody else picks it up I’ll see
> if I can work out an ImageMagick fall‐back system.

Thanks for doing all that. I tweaked the indentation a bit to fit in 80 
columns etc.

At some point soon I plan to install the patch in Bug#33587#5, which 
would disable ImageMagick by default when configuring Emacs (you can 
still enable it if you like). On my Fedora 29 desktop this patch 
decouples Emacs from libMagickCore, libMagickWand, libfftw3 (the FFT 
library), libgomp (OpenMP), libtldl (libtool), and libXt (X toolkit), 
which shaves 5-10 ms off the Emacs startup time in my little experiments.