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Diffstat (limited to 'giftopnm.html')
| -rw-r--r-- | giftopnm.html | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/giftopnm.html b/giftopnm.html index 93a68d02..a4a82b48 100644 --- a/giftopnm.html +++ b/giftopnm.html @@ -2,7 +2,7 @@ <HTML><HEAD><TITLE>Giftopnm User Manual</TITLE></HEAD> <BODY> <H1>giftopnm</H1> -Updated: 11 August 2008 +Updated: 25 May 2012 <BR> <A HREF="#index">Table Of Contents</A> @@ -52,13 +52,12 @@ Netpbm output image has the wrong aspect ratio. In this case, <DL COMPACT> <DT><B>--alphaout=</B><I>alpha-filename</I> -<DD><B>giftopnm </B> creates a PGM (portable graymap) file containing -the alpha channel values in the input image. If the input image -doesn't contain an alpha channel, the <I>alpha-filename</I> file -contains all zero (transparent) alpha values. If you don't specify -<B>--alphaout</B>, <B>giftopnm</B> does not generate an alpha file, -and if the input image has an alpha channel, <B>giftopnm</B> simply -discards it. +<DD><B>giftopnm </B> creates a PBM file containing the alpha channel values in +the input image. If the input image doesn't contain an alpha channel, +the <I>alpha-filename</I> file contains all zero (transparent) alpha values. +If you don't specify <B>--alphaout</B>, <B>giftopnm</B> does not generate an +alpha file, and if the input image has an alpha channel, <B>giftopnm</B> +simply discards it. <P>If you specify <B>-</B> as the filename, <B>giftopnm</B> writes the alpha output to Standard Output and discards the image. |