[mapserver-users] mapcache of non-jpeg/png formats

[thomas bonfort]

On Wed, Jan 4, 2012 at 23:11, Enzmann, Alexander R. <xander at mitre.org> wrote:
> It appears that mapcache has exactly two supported storage formats, JPEG and
> PNG.  Is there any way to have it store something else (e.g., TIFF, BIL)
> without adding explicit code like that in imageio_jpeg.c and imageio_png.c?
Explicit code would have to be added. In the general case, the imageio
functions take in an array of raw pixels (8bit unsigned rgba
quadruplets) and return the encoded data ready to be written to disk.
Conversely, they input an encoded stream of data and return an 8bit
rgba array.

>
> Any thoughts to having mapcache handle whatever formats GDAL supports, much
> like mapserver itself?

Can you help me think out of the box and give me a bit of context on
what you are trying to achieve? Mapcache serves image tiles to be
displayed on a browser, so any format other than png/jpg/gif is
currently out of scope.
That said, there would be no technical limitation in adding any other
image format for specific use-cases, provided the image data remains
8bit rgba. If you are aiming for supporting non 8bit data, the task
will become more involved as it will impact all the image manipulating
operations coded into mapcache (metatile chopping into single tiles,
and tile merging/assembling for full wms support).

--
thomas

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> Xander
>
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