[Bug 902024] Review Request: gdk-pixbuf-psd - GdkPixbuf loader for the PSD file format

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Product: Fedora
https://bugzilla.redhat.com/show_bug.cgi?id=902024

--- Comment #3 from Michael Schwendt <mschwendt@xxxxxxxxx> ---
The primary reason why I've searched a bit about this is that PSD is (or used
to be?) a proprietary and undocumented file format. I wanted to learn how much
of this is "open", legal and not just reengineered. I'm not familiar with
what's included in Adobe's SDKs (both old and new). Many closed SDKs only
include binary objects with API documentation, but the existing file formats
specification for 3rd parties means that something has been opened up here.


See also: http://www.coolutils.com/Formats/PSD

> If some file format is not recognized, I will report it upstream.

With only having skimmed over the linked specs from Adobe, it is doubtful that
the 15K C source file supports everything mentioned in Adobe's specs, in
particular the long(er) list of image resources.

> The loader supports:
> - RGB and CYMK images

Spec mentions: Bitmap = 0; Grayscale = 1; Indexed = 2; RGB = 3; CMYK = 4;
Multichannel = 7; Duotone = 8; Lab = 9.

> - RLE compression

Spec mentions: 0 = Raw Data, 1 = RLE compressed, 2 = ZIP without prediction, 3
= ZIP with prediction

> - 8 and 16 bit color depths

Spec mentions: 1, 8, 16 and 32.

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