In most raw files the thumbnail exists as an embedded jpeg. I know how to read it to memory, but need advice on how to load it into gimp (i.e. create a valid image ID for it).
Option a) Perhaps such functionality already exists - but I did not find it?
Option b) Go through the file system - write a temporary file and load it via a PDB call.
Option c) Use some jpeg library (say libjpeg) to read it.
(b) is the probably the simplest, but I am not happy about going to the file system and all the issues it brings. On the other hand (c) is quite complicated.
Can someone make a suggestion?
Sven Neumann wrote:
a while ago Joseph Heled <[EMAIL PROTECTED]> wrote:
The gimp Open Image dialog contains preview thumbnail. To generate them, gimp calls the plugin to generate them. Now, for raw digital camera files (.nef, .crw ...) this is a very expensive operation - and obviously one would love to use the prepared/pre-stored thumbnail which exists in the file.
From what I could see, there is no way I (the plugin author) can detect if the call is for a thumbnail or not.
Note that I have just added the missing API for plug-ins and also implemented the core functionality. What's missing now is some more plug-ins using this feature. See also
http://bugzilla.gnome.org/show_bug.cgi?id=158190 http://bugzilla.gnome.org/show_bug.cgi?id=158191 http://bugzilla.gnome.org/show_bug.cgi?id=158192 http://bugzilla.gnome.org/show_bug.cgi?id=158193
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