CR2 image will not display properly

[SeanCollins]

gcc2h hrev43447 nightly

attaching screen shot and link to file.

[SeanCollins]

​http://dl.dropbox.com/u/6305079/IMG_0943.CR2.zip

[pulkomandy]

The current version of dcraw converts this image to a ppm which ShowImage can open. Unfortunately dcraw is still distributed as a monolithic .c file so we need to analyze the changes and backport them to our cleaned up C++ version. dcraw is versionned using RCS, so extracting the changes from there may not be as easy as usual.

[pulkomandy]

We could make the translator use ​http://www.libraw.org. I have confirmed that older versions of dcraw have the same problem decoding this image, various issues were fixed and the image looks correct starting from dcraw 9.08. However merging the changes back to our forked and rewritten version is error-prone and time consuming.

Rewriting the translator to use libraw instead should fix the problem. Libraw is based on the same code, but kept up to date with current versions.

[axeld]

Unfortunately, libraw needs gcc 4+ to compile, so a solution based on it would not work with the default system. One of the few cases where binary compatibility hurts.

Of course, we could provide different implementations depending on the target platform, so that x86 and x86-64 would not be affected (same for ffmpeg).

[pulkomandy]

Since hrev55420, the versions of the raw translator built with modern gcc use libraw. Is that good enough to close this ticket? Or should we make it possible to build a translator with gcc11 in a way that it can be loaded in a gcc2 app?