NAME¶
gifrotat - A program to rotate a GIF image by a specified angle.
USAGE¶
gifrotat -a Angle [-q] [-s Width Height] [-h] gif-file
If no gif-file is given, GifRotat will try to read a GIF file from stdin.
MEMORY REQUIRED¶
Screen (of source image).
OPTIONS¶
- -a Angle
-
Specifies the angle to rotate in degrees with respect to the X (horizontal)
axis.
- [-q]
-
Quiet mode. Defaults off on MSDOS, on under UNIX. Controls printout of
running scan lines. Use -q- to invert.
- [-s Width Height]
-
Since the rotated image will have the same image size as the original, some
parts of the image will by clipped out and lost. By specifying a (bigger)
size explicitly using the `-s' option, these parts may be saved.
- [-h]
-
Print one line of command line help, similar to Usage above.
NOTES¶
The image is rotated around its center. No filtering is performed on the output,
which have the same color map as the input. This is mainly since filtering
would require color quantization which is very memory/time intensive and out
of MSDOS memory limits even for small images.
AUTHOR¶
Gershon Elber
Man page created by T.Gridel <tgridel@free.fr>, originally written by Eric
S. Raymond <esr@thyrsus.com>