[mcclim-devel] Image-reading in McCLIM

[Cyrus Harmon]

At a minimum, it would be nice if closure and other McCLIM apps could  
use the same libraries.

Cyrus

On Jan 5, 2008, at 2:17 PM, David Lichteblau wrote:

> Quoting Troels Henriksen (athas at sigkill.dk):
>> To rectify this, I think we should bundle some simple library with
>
> Good idea.
>
> I wonder whether that library could be external to McCLIM, so that  
> other
> applications could also use it.  As long as it just returns arrays of
> colors in the format CLIM wants, it would plug right into our image
> drawing routines and still not have to depend on CLIM internals  
> itself.
>
>> McCLIM for converting image files to CLIM patterns, just like
>> CLIM-INTERNALS::XPM-PARSE-FILE does.
>
> The indexed pattern code would be used for images with a palette, like
> GIF and XPM.
>
>> (I see something called rgb-image.lisp in mcclim/Extensions, what is
>> it used for?)
>
> That's the second image format we would want to support, for 24 bit  
> RGB
> colors (plus alpha channel), originally from Closure.
>
> RGB-IMAGE is the right class to return when parsing JPEG or one of the
> formats that might or might not have a palette (PNG, BMP).
>
> The format-specific image library could just return the (unsigned-byte
> 32) array as needed for RGB-IMAGE, with the latter being wrapped  
> around
> it by CLIM code.
>
>
> d.
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