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Date: Sun, 02 May 2010 11:19:52 +0200
From: Andre <avsaway@hotmail.com>
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Subject: Re: A generic image decoder - specification design
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Date: 2010-05-02T11:19:52+02:00
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Gautier,

The first question which comes up in mind is: where do you want to use 
it for?
Is it an initial step for your Ada based browser?

The 2nd question is more basic, are you write the load image functions 
in Ada or use bindings to existing libraries (like the JPEG one)?

Basically all pixel based images are a block of memory. The one which 
are 8 bit based use normally a Palette (like GIF and 8-bit BMP). The 
full color versions (JPEG, 24-bit BMP) use 3 or 4 byte per pixel (4th 
one is in general the alpha channel) in a memory map. So that can easily 
be modeled.
If it is for a browser, you can forget about the 1-, 2- and 4-bit images.

So how will be your real image data be modeled?
Do you plan to just use a 24-bit with alpha channel format and convert 
lower grade images (like GIF) into this format?
Or do you want to represent the different image types also in you data 
model?

just some feedback,
Andr�

On 5/1/2010 22:30, Gautier write-only wrote:
> Here is already a tiny update:
>
> http://gen-img-dec.svn.sf.net/viewvc/gen-img-dec/gid.ads?view=markup&pathrev=2
>
> I've discovered the possibility of an Inline pragma to a procedure
> listed in a generic formal part. At least GNAT and ObjectAda don't
> protest on that, so probably it makes some sense...
>
> G.