RAW images support

[ndl]

Describe the feature you'd like to request

The current value of IMAGE_FORMATS doesn't include the image/x-dcraw value which prevents RAW images from being scanned / recognized.

Describe the solution you'd like

I've verified that extending IMAGE_FORMATS with the value image/x-dcraw picks up all the various RAW image formats I have. This is sufficient given that Recognize uses the standard NextCloud Preview functionality and 'Camera RAW Previews' app already takes care of RAW files.

Describe alternatives you've considered

N/A.

[github-actions]

Hello 👋

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[marcelklehr]

Hi @ndl
Thank you for the feedback and the research you have done! This is a great addition.

[Forza-tng]

One more thing to think about. I believe that imagemagick requires that DNG files are handled specifically, as autodetection won't work.

https://imagemagick.org/script/formats.php

Requires an explicit image format otherwise the image is interpreted as a TIFF image (e.g. dng:image.dng).

Perhaps this is why i see lines like this in the imagemagic log file:

  <event>2024-01-14T08:18:12+00:00 0:10.739 0.480u 7.1.1 Policy php[70430]: policy.c/IsRightsAuthorized/656/Policy
  Domain: Module; rights=Unrecognized; pattern="DNG" ...</event>

ImageMagic logging can be enabled in log.xml

<logmap>
  <!-- <log output="console" events="none"/> -->
  <log output="file" events="all"/>
  <log events="None"/>
    <log filename="/var/tmp/imagemagick/Magick-%g.log"/>
  <log generations="3"/>
  <log limit="2000"/>
  <!--<log format="%t %r %u %v %d %c[%p]: %m/%f/%l/%d\n  %e"/> -->
  <log format="%t %r %u %v %d %c[%p]: %m/%f/%l/%d\n  %e"/>
</logmap>

Note that the path must be accessible and writable by the php user.