Thumbnails: Difference between revisions

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# 'gdk-pixbuf-thumbnailer.thumbnailer' is created in '/run/current-system/sw/share/thumbnailers'

}</syntaxhighlight>For newer image formats not included in <code>gdk-pixbuf</code> you can enable thumbnails by adding their specific image libraries into the system packages as seen below<syntaxhighlight lang="nix"># configuration.nix

}</syntaxhighlight>

==== Thumbnails for newer image formats such as AVIF and JPEG XL ====

For newer image formats not included in <code>gdk-pixbuf</code> you can enable thumbnails by adding their specific image libraries into the system packages as seen below<syntaxhighlight lang="nix"># configuration.nix

{ pkgs, ... }:

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gdk-pixbuf can be used to generate thumbnails for RAW camera image formats by reading the embedded jpeg. This embedded jpeg is typically generated in the camera or overwritten by your RAW editing software, and may not match what the photo looks like when opened in a viewer or editor.

<syntaxhighlight lang="nix"># configuration.nix

# configuration.nix

{ pkgs, ... }:

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# Other MimeTypes that include embedded jpeg may work as well (e.g. Nikon .nef, Sony .arf, etc)

# Test other formats by adding them above

];

}</syntaxhighlight>

'''exiv2-thumbnailer'''

exiv2 can as well generate thumbnails for RAW camera formats by extracting their embedded JPEG or TIFF previews, making thumbnail creation fast without full RAW decoding. It may also support a wider range of RAW formats than gdk‑pixbuf, since it works directly with metadata rather than relying on codec‑level image loaders.<syntaxhighlight lang="nix">

# configuration.nix

{ pkgs, ... }:

{

environment.systemPackages = [

# exiv2-based RAW thumbnailer (extracts embedded JPEG/TIFF)

(pkgs.writeShellApplication {

name = "exiv2-thumbnailer";

runtimeInputs = [ pkgs.exiv2 pkgs.imagemagick ];

text = ''

#!${pkgs.bash}/bin/bash

set -euo pipefail

tmpdir="$(mktemp -d)"

trap 'rm -rf "$tmpdir"' EXIT

exiv2 -l "$tmpdir" --extract p1 "$1"

base="$(basename "$1")"

preview="$tmpdir/\${base%.*}-preview1.jpg"

[ ! -f "$preview" ] && preview="${preview%.*}.tif"

magick "$preview" -thumbnail "\${3}x\${3}>" -strip "png:$2"

'';

})

(pkgs.writeTextFile {

name = "exiv2-thumbnailer.thumbnailer";

destination = "/share/thumbnailers/exiv2-thumbnailer.thumbnailer";

text = ''

[Thumbnailer Entry]

TryExec=exiv2-thumbnailer

Exec=exiv2-thumbnailer %i %o

MimeType=image/x-canon-crw;image/x-canon-cr2;image/x-canon-cr3;image/x-adobe-dng;image/x-dng;

'';

})

];

}

</syntaxhighlight>

</syntaxhighlight>For a more complete solution, see the NixOS port of [https://github.com/stackcoder/nixos-nautilus-raw-thumbnails nautilus‑raw‑thumbnails].

==== nufraw-thumbnailer ====

@@ Line 56: / Line 56: @@
    # 'gdk-pixbuf-thumbnailer.thumbnailer' is created in '/run/current-system/sw/share/thumbnailers'
-}</syntaxhighlight>For newer image formats not included in <code>gdk-pixbuf</code> you can enable thumbnails by adding their specific image libraries into the system packages as seen below<syntaxhighlight lang="nix"># configuration.nix
+}</syntaxhighlight>
+==== Thumbnails for newer image formats such as AVIF and JPEG XL ====
+For newer image formats not included in <code>gdk-pixbuf</code> you can enable thumbnails by adding their specific image libraries into the system packages as seen below<syntaxhighlight lang="nix"># configuration.nix
 { pkgs, ... }:
@@ Line 94: / Line 97: @@
 gdk-pixbuf can be used to generate thumbnails for RAW camera image formats by reading the embedded jpeg. This embedded jpeg is typically generated in the camera or overwritten by your RAW editing software, and may not match what the photo looks like when opened in a viewer or editor.
-<syntaxhighlight lang="nix">
+<syntaxhighlight lang="nix"># configuration.nix
-# configuration.nix
 { pkgs, ... }:
@@ Line 114: / Line 116: @@
      # Other MimeTypes that include embedded jpeg may work as well (e.g. Nikon .nef, Sony .arf, etc)
      # Test other formats by adding them above
+  ];
+}</syntaxhighlight>
+'''exiv2-thumbnailer'''
+exiv2 can as well generate thumbnails for RAW camera formats by extracting their embedded JPEG or TIFF previews, making thumbnail creation fast without full RAW decoding. It may also support a wider range of RAW formats than gdk‑pixbuf, since it works directly with metadata rather than relying on codec‑level image loaders.<syntaxhighlight lang="nix">
+# configuration.nix
+{ pkgs, ... }:
+{
+  environment.systemPackages = [
+    # exiv2-based RAW thumbnailer (extracts embedded JPEG/TIFF)
+    (pkgs.writeShellApplication {
+      name = "exiv2-thumbnailer";
+      runtimeInputs = [ pkgs.exiv2 pkgs.imagemagick ];
+      text = ''
+        #!${pkgs.bash}/bin/bash
+        set -euo pipefail
+        tmpdir="$(mktemp -d)"
+        trap 'rm -rf "$tmpdir"' EXIT
+        exiv2 -l "$tmpdir" --extract p1 "$1"
+        base="$(basename "$1")"
+        preview="$tmpdir/\${base%.*}-preview1.jpg"
+        [ ! -f "$preview" ] && preview="${preview%.*}.tif"
+        magick "$preview" -thumbnail "\${3}x\${3}>" -strip "png:$2"
+      '';
+    })
+    (pkgs.writeTextFile {
+      name = "exiv2-thumbnailer.thumbnailer";
+      destination = "/share/thumbnailers/exiv2-thumbnailer.thumbnailer";
+      text = ''
+        [Thumbnailer Entry]
+        TryExec=exiv2-thumbnailer
+        Exec=exiv2-thumbnailer %i %o
+        MimeType=image/x-canon-crw;image/x-canon-cr2;image/x-canon-cr3;image/x-adobe-dng;image/x-dng;
+      '';
+    })
    ];
 }
-</syntaxhighlight>
+</syntaxhighlight>For a more complete solution, see the NixOS port of [https://github.com/stackcoder/nixos-nautilus-raw-thumbnails nautilus‑raw‑thumbnails].
 ==== nufraw-thumbnailer ====