gifrotat.html
来自「giflib-4.1.6.tar.gz,最新的GIF 解码库」· HTML 代码 · 共 63 行
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63 行
<!doctype HTML public "-//W3O//DTD W3 HTML 2.0//EN"><HTML><HEAD><TITLE>gifrotat</TITLE><link rev=made href=mailto:esr@snark.thyrsus.com></HEAD><BODY>Go to <a href="index.html">index page</a>.<CENTER><H1>gifrotat</H1></CENTER>A program to rotate a GIF image by a specified angle.<P><H1>Usage:</H1><pre>gifrotat -a Angle [-q] [-s Width Height] [-h] gif-file</pre>If no gif-file is given, GifRotat will try to read a GIF file from stdin.<P><H1>Memory required:</H1>Screen (of source image).<P><H1>Options:</H1><DL><DT> -a Angle<DD> Specifies the angle to rotate in degrees with respect to the X (horizontal) axis.<P><DT> [-q]<DD> Quiet mode. Defaults off on MSDOS, on under UNIX. Controls printout of running scan lines. Use -q- to invert.<P><DT> [-s Width Height]<DD> 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 specifing a (bigger) size explicitly using the `-s' option, these parts may be saved.<P><DT> [-h]<DD> Print one line of command line help, similar to Usage above.<P></DL><H1>Notes:</H1>The image is rotated around its center. No filtering is performed on theoutput, which have the same color map as the input. This is mainly sincefiltering would require color quantization which is very memory/time intensiveand out of MSDOS memory limits even for small images.<P><H1>Author:</H1>Gershon Elber<HR><ADDRESS>Eric S. Raymond <A HREF="mailto:esr@thyrsus.com"><esr@snark.thyrsus.com></A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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