This is a quick & dirty OS4 port of Roland Mainz's gifanim.datatype
(http://aminet.net/package.php?package=util/dtype/gifanimdtc203.lha).

INSTALLATION:

1. copy animgif.datatype to SYS:Classes/DataTypes/
2. copy ANIMGIF and/or GIF to DEVS:DataTypes/

If you only copy the ANIMGIF descriptor then the default gif.datatype will be
used for non-anim gifs while this one will only be used for anim gifs.

CONFIGURATION:

For information on what configuration options are available check the prefs.c
file.

f.e. to disable the default looping (NOLOOP option) and enable verbode mode
(VERBOSE option) the following can be used:

setenv Classes/DataTypes/gifanim.prefs "NOLOOP VERBOSE" save

Note: TRUECOLOR mode crashes/doesn't work at the moment and should therefore not
be used. Apart from that I haven't tested many of the options so can't tell
whether they work or not.

CHANGES:

(27-Sep-06):
 - added OS4 native ANIMGIF descriptor file (thanks to Chris Young)

2.5 (13-Sep-06):
 - added NOLOOP option to disable default looping.

2.4 (12-Sep-06):
 - playback now loops by default (DTA_Repeat set to TRUE).

2.3 (10-Sep-06):
 - first OS4 native release.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  713    2044  34.9% -lh5- 5541 Sep 27 10:05 gifanim_dt-os4/descriptor
[generic]                 1877    6435  29.2% -lh5- c1fe Sep 27 09:59 gifanim_dt-os4/descriptor.c
[generic]                20701   94432  21.9% -lh5- 0311 Sep 13 10:00 gifanim_dt-os4/dispatch.c
[generic]                 9624   33028  29.1% -lh5- 9fce Sep 10 10:35 gifanim_dt-os4/encoder.c
[generic]                   73      82  89.0% -lh5- 9ec4 Mar 23  1998 gifanim_dt-os4/GIF
[generic]                 3501    3880  90.2% -lh5- b1ac Sep 10 10:48 gifanim_dt-os4/GIF.info
[generic]                  820    2190  37.4% -lh5- de60 Sep 27 10:07 gifanim_dt-os4/GIFANIM
[generic]                19762   45624  43.3% -lh5- 338e Sep 27 10:04 gifanim_dt-os4/gifanim.datatype
[generic]                  121     217  55.8% -lh5- 39ba Sep 13 14:51 gifanim_dt-os4/gifanim.datatype_rev.h
[generic]                  136     263  51.7% -lh5- af79 Sep 13 14:51 gifanim_dt-os4/gifanim.datatype_rev.i
[generic]                    2       2 100.0% -lh0- 5797 Sep 13 14:51 gifanim_dt-os4/gifanim.datatype_rev.rev
[generic]                  138     276  50.0% -lh5- 1ce4 Sep 13 14:51 gifanim_dt-os4/gifanim.datatype_rev.s
[generic]                  124     149  83.2% -lh5- 6e9b Sep 27 10:07 gifanim_dt-os4/GIFANIM.dt
[generic]                 3501    3880  90.2% -lh5- b1ac Sep 10 10:48 gifanim_dt-os4/GIFANIM.info
[generic]                 2048    6262  32.7% -lh5- 16dc Sep 10 10:45 gifanim_dt-os4/include/classbase.h
[generic]                 2443    7495  32.6% -lh5- cf61 Sep 13 09:55 gifanim_dt-os4/include/classdata.h
[generic]                  996    2643  37.7% -lh5- 5ed3 Sep 10 01:14 gifanim_dt-os4/include/encoder.h
[generic]                 2255    7386  30.5% -lh5- 1294 Sep 10 21:16 gifanim_dt-os4/init.c
[generic]                  609    1237  49.2% -lh5- e075 Sep 27 10:09 gifanim_dt-os4/Makefile
[generic]                 3013    9205  32.7% -lh5- b517 Sep 10 10:47 gifanim_dt-os4/misc.c
[generic]                 4615   16920  27.3% -lh5- c023 Sep 13 10:14 gifanim_dt-os4/prefs.c
[generic]                  679    1245  54.5% -lh5- 0efe Sep 27 10:18 gifanim_dt-os4/README
[generic]                  924    2579  35.8% -lh5- e4e1 Sep 10 09:37 gifanim_dt-os4/stackswap.c
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        23 files   78675  247474  31.8%            Sep 27 16:35