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authorgiraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8>2010-12-10 18:10:46 +0000
committergiraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8>2010-12-10 18:10:46 +0000
commit166c8e2aa6daf2d364f1af0834ac5f030ed064db (patch)
tree65430f65074b94260967155930cc49ce132984a6 /pnmtops.html
parentab536713f100ad65275beac519d9e51b58316613 (diff)
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miscellaneous update
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@1371 9d0c8265-081b-0410-96cb-a4ca84ce46f8
Diffstat (limited to 'pnmtops.html')
-rw-r--r--pnmtops.html19
1 files changed, 18 insertions, 1 deletions
diff --git a/pnmtops.html b/pnmtops.html
index 4c47317a..eddafc75 100644
--- a/pnmtops.html
+++ b/pnmtops.html
@@ -2,7 +2,7 @@
 <HTML><HEAD><TITLE>Pnmtops User Manual</TITLE></HEAD>
 <BODY>
 <H1>pnmtops</H1>
-Updated: 01 May 2010
+Updated: 10 December 2010
 <BR>
 <A HREF="#index">Table Of Contents</A>
 
@@ -22,6 +22,7 @@ pnmtops - convert PNM image to PostScript
 [<B>-equalpixels</B>]
 [<b>-bitspersample=</b><i>N</i>]
 [<B>-turn</B>|<B>-noturn</B>]
+[<B>-textalphabits=</B>{<b>1</b>,<b>2</b>,<b>4</b>}
 [<B>-rle</B>|<B>-runlength</B>]
 [<b>-flate</b>]
 [<b>-ascii85</b>]
@@ -199,6 +200,22 @@ gets turned automatically to better fit the page.  If you specify the
 its shape; If you specify <B>-noturn</B>, <B>pnmtops</B> does
 <em>not</em> turn it no matter what its shape.
 
+<dt><b>-textalphabits=</b>{<b>1</b>,<b>2</b>,<b>4</b>}
+
+<dd>This controls subsample antialiasing of text.  Antialiasing is a form of
+smoothing that eliminates jagged edges on characters.  Subsample antialiasing
+is a kind of antialiasing that uses subpixels in a box, and the value of this
+option is the size of that box.  4 gives you the best looking output, while 1
+causes no antialiasing.  Smaller numbers make <b>pnmtops</b> use less CPU
+time.
+
+<p>Pstopnm uses Ghostscript's <b>TextAlphaBits</b> parameter for this.
+
+<p>The default is 4.
+
+<P>This option was new in Netpbm 10.53 (December 2010).  Older versions of
+<b>pnmtops</b> do no antialiasing.
+
 <DT><B>-rle</B>
 
 <DT><B>-runlength</B>