Imagemagick and Guile

Imagemagick and Guile

[A0]

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Hello,

I need to generate an image from raw byte data in my code and
ImageMagick seems like an obvious choice to do this. But, looking
at
http://www.imagemagick.org/script/api.php ,
I see no Guile API listed.

Before I get my hands dirty, I'd like to check if someone already
built a functional API for Guile, or, at least, the chunk of it
containing the PixelIterator functionality.

I am also interested in hearing about other Guile-enabled libs
that can do the same thing, namely, creating an image in some
of the popular formats.

Best,

A0
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Re: Imagemagick and Guile

[Nala Ginrut]

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Hi! IIRC there is no Imagemagick binding for guile. It is good to have one.
But you may use guile-charting to generate images from data.

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Re: Imagemagick and Guile

[John Darrington]

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I have done similar things using Gimp.

Gimp, as you may know, has a Scheme interface which is very similar to 
Guile, (in fact I believe Guile was forked from the Gimp interpretor).


For example to generate png files from a svg input see

http://git.savannah.gnu.org/cgit/pspp.git/tree/build-aux/svg2png

The disadvantage is that it is much slower than imagemagick

J'

On Sun, Jan 11, 2015 at 09:09:04AM +0000, A0 wrote:
     
     Hello,
     
     I need to generate an image from raw byte data in my code and
     ImageMagick seems like an obvious choice to do this. But, looking
     at
     http://www.imagemagick.org/script/api.php ,
     I see no Guile API listed.
     
     Before I get my hands dirty, I'd like to check if someone already
     built a functional API for Guile, or, at least, the chunk of it
     containing the PixelIterator functionality.
     
     I am also interested in hearing about other Guile-enabled libs
     that can do the same thing, namely, creating an image in some
     of the popular formats.
     
     Best,
     
     A0
     

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Re: Imagemagick and Guile

[A0]

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On 11/01/15 12:02, John Darrington wrote:
> I have done similar things using Gimp.
> 
> Gimp, as you may know, has a Scheme interface which is very similar
> to Guile, (in fact I believe Guile was forked from the Gimp
> interpretor).
> 
> 
> For example to generate png files from a svg input see
> 
> http://git.savannah.gnu.org/cgit/pspp.git/tree/build-aux/svg2png
> 
> The disadvantage is that it is much slower than imagemagick
> 
> J'
> 
> On Sun, Jan 11, 2015 at 09:09:04AM +0000, A0 wrote:
> 
> Hello,
> 
> I need to generate an image from raw byte data in my code and 
> ImageMagick seems like an obvious choice to do this. But, looking 
> at http://www.imagemagick.org/script/api.php , I see no Guile API
> listed.
> 
> Before I get my hands dirty, I'd like to check if someone already 
> built a functional API for Guile, or, at least, the chunk of it 
> containing the PixelIterator functionality.
> 
> I am also interested in hearing about other Guile-enabled libs that
> can do the same thing, namely, creating an image in some of the
> popular formats.
> 
> Best,
> 
> A0
> 
> 

Thanks for the info, but for the application I have i mind
the conversion needs to be as fast as reasonably possible.

Best,

A0
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Re: Imagemagick and Guile

[Neil Jerram]

On 2015-01-11 09:09, A0 wrote:

> I need to generate an image from raw byte data in my code and
> ImageMagick seems like an obvious choice to do this. But, looking
> at
> http://www.imagemagick.org/script/api.php ,
> I see no Guile API listed.
> 
> Before I get my hands dirty, I'd like to check if someone already
> built a functional API for Guile, or, at least, the chunk of it
> containing the PixelIterator functionality.
> 
> I am also interested in hearing about other Guile-enabled libs
> that can do the same thing, namely, creating an image in some
> of the popular formats.

In addition to the other suggestions that people have made, note that 
you could also use the Guile FFI to access ImageMagick's C API from 
Guile.

Personally, I find using the FFI much more fun than writing a 'proper' 
Guile binding.

Regards,
       Neil

Re: Imagemagick and Guile

[A0]

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On 11/01/15 12:11, Neil Jerram wrote:
> On 2015-01-11 09:09, A0 wrote:
> 
>> I need to generate an image from raw byte data in my code and 
>> ImageMagick seems like an obvious choice to do this. But,
>> looking at http://www.imagemagick.org/script/api.php , I see no
>> Guile API listed.
>> 
>> Before I get my hands dirty, I'd like to check if someone
>> already built a functional API for Guile, or, at least, the chunk
>> of it containing the PixelIterator functionality.
>> 
>> I am also interested in hearing about other Guile-enabled libs 
>> that can do the same thing, namely, creating an image in some of
>> the popular formats.
> 
> In addition to the other suggestions that people have made, note
> that you could also use the Guile FFI to access ImageMagick's C API
> from Guile.
> 
> Personally, I find using the FFI much more fun than writing a
> 'proper' Guile binding.
> 
> Regards, Neil
> 
> 

Sure, I'll use the FFI to wrap the procedures i need, provided no one
has bothered to
do that before. I just think, unless for educational purposes, or if
you can do it much better (but, hey, it's just an API),
it does not make much sense to repeat something someone has already
done before.

Best,

A0
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Re: Imagemagick and Guile

[David Pirotte]

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Hello,

> ...
> Personally, I find using the FFI much more fun than writing a 'proper' 
> Guile binding
> ...

I would consider GraphicsMagick instead http://www.graphicsmagick.org/index.html
There has been a fork in 2002, due to license problems,

	 ... ImageMagick from ImageMagick Studio LLC abandoned the MIT X11 style
	 license it had been using since 1992, and switched between several different
	 licenses until it ended up with one based on the Apache license, which is
	 intended to penalize projects which borrow some of its source code, or fork
	 from it. Since that time, GraphicsMagick has not incorporated any
	 ImageMagick source code

	... On November 27, 2003 ImageMagick Studio LLC applied to register
	"ImageMagick" as its trademark, and it was awarded this registered trademark
	(serial number 78333969) on August 30, 2005. Those who re-distribute
	modified versions of "ImageMagick" (e.g. patched or improved) under license
	as "ImageMagick" now face the risk of arbitrary trademark infringement
	claims by ImageMagick Studio LLC ...

Cheers,
David

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Re: Imagemagick and Guile

[Ludovic Courtès]

A0 <cape.wrath@openmailbox.org> skribis:

> I need to generate an image from raw byte data in my code and
> ImageMagick seems like an obvious choice to do this.

Alternately, I think Andy’s guile-jpeg would be readily usable to
generate JPEGs from bitmaps:

  https://gitorious.org/guile-jpeg/guile-jpeg/

Ludo’.