"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">\r
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" dir="ltr">\r
<head>\r
- <meta http-equiv="content-type" content="text/html; charset=utf-8"/>\r
- <meta name="verify-v1" content="g222frIIxcQTrvDR3NBRUSKP3AnMNoqxOkIniCEkV7U=" />\r
- <link rel="meta" type="application/rdf+xml" title="ICI" href="http://imagemagick.org/ici.rdf" />\r
- <style type="text/css" media="all">\r
- @import url("../www/magick.css");\r
- </style>\r
- <link rel="shortcut icon" href="../images/wand.ico" type="images/vnd.microsoft.icon"/>
- <title>ImageMagick: The Fx Special Effects Image Operator</title>
+ <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>\r
+ <meta name="verify-v1" content="g222frIIxcQTrvDR3NBRUSKP3AnMNoqxOkIniCEkV7U="/>\r
+ <title>ImageMagick: The Fx Special Effects Image Operator</title/>
<meta http-equiv="Content-Language" content="en-US"/>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<meta http-equiv="Reply-to" content="magick-users@imagemagick.org"/>
+ <meta name="Application-name" content="ImageMagick"/>
+ <meta name="Description" content="ImageMagick® is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX. Use ImageMagick to translate, flip, mirror, rotate, scale, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves. ImageMagick is free software delivered as a ready-to-run binary distribution or as source code that you can freely use, copy, modify, and distribute. Its license is compatible with the GPL. It runs on all major operating systems. The functionality of ImageMagick is typically utilized from the command line or you can use the features from programs written in your favorite programming language. Choose from these interfaces: MagickCore (C), MagickWand (C), ChMagick (Ch), Magick++ (C++), JMagick (Java), L-Magick (Lisp), PascalMagick (Pascal), PerlMagick (Perl), MagickWand for PHP (PHP), PythonMagick (Python), RMagick (Ruby), or TclMagick (Tcl/TK). With a language interface, use ImageMagick to modify or create images automagically and dynamically."/>
+ <meta name="Application-url" content="http://www.imagemagick.org"/>
<meta name="Generator" content="PHP"/>
<meta name="Keywords" content="the, fx, special, effects, image, operator, ImageMagick, ImageMagic, MagickCore, MagickWand, PerlMagick, Magick++, RMagick, PythonMagick, JMagick, TclMagick, Image, Magick, Magic, Wand, ImageMagickObject, Swiss, Army, Knife, Image, Processing"/>
- <meta name="Description" content="ImageMagick® is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX. Use ImageMagick to translate, flip, mirror, rotate, scale, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves. ImageMagick is free software delivered as a ready-to-run binary distribution or as source code that you can freely use, copy, modify, and distribute. Its license is compatible with the GPL. It runs on all major operating systems. The functionality of ImageMagick is typically utilized from the command line or you can use the features from programs written in your favorite programming language. Choose from these interfaces: MagickCore (C), MagickWand (C), ChMagick (Ch), Magick++ (C++), JMagick (Java), L-Magick (Lisp), PascalMagick (Pascal), PerlMagick (Perl), MagickWand for PHP (PHP), PythonMagick (Python), RMagick (Ruby), or TclMagick (Tcl/TK). With a language interface, use ImageMagick to modify or create images automagically and dynamically."/>
<meta name="Rating" content="GENERAL"/>
<meta name="Robots" content="INDEX, FOLLOW"/>
<meta name="Generator" content="ImageMagick Studio LLC"/>
<meta name="Author" content="ImageMagick Studio LLC"/>
<meta name="Revisit-after" content="2 DAYS"/>
<meta name="Resource-type" content="document"/>
- <meta name="Copyright" content="Copyright (c) 1999-2010 ImageMagick Studio LLC"/>
+ <meta name="Copyright" content="Copyright (c) 1999-2011 ImageMagick Studio LLC"/>
<meta name="Distribution" content="Global"/>
+ <link rel="icon" href="../images/wand.png" sizes="32x32"/>
+ <link rel="shortcut icon" href="../images/wand.ico" type="images/x-icon"/>
+ <link rel="meta" type="application/rdf+xml" title="ICI" href="http://imagemagick.org/ici.rdf"/>\r
+ <style type="text/css" media="all">\r
+ @import url("../www/magick.css");\r
+ </style>\r
</head>\r
\r
<body id="www-imagemagick-org">\r
style="width: 114px; height: 118px; border: 0px; float: right;" /></a>\r
</div>\r
\r
-<div class="eastbar">\r
+<div class="westbar">\r
\r
<div class="menu">
<a title="About ImageMagick" href="../index.html">About ImageMagick</a>
</div>
<div class="sep"></div>\r
+<div class="menu">
+ <a title="Binary Releases" href="../www/binary-releases.html">Binary Releases</a>
+</div>
+<div class="sub">
+ <a title="Binary Release: Unix" href="../www/binary-releases.html#unix">Unix</a>
+</div>
+<div class="sub">
+ <a title="Binary Release: MacOS X" href="../www/binary-releases.html#macosx">Mac OS X</a>
+</div>
+<div class="sub">
+ <a title="Binary Release: Windows" href="../www/binary-releases.html#windows">Windows</a>
+</div>
+<div class="sep"></div>\r
<div class="menu">
<a title="Command-line Tools" href="../www/command-line-tools.html">Command-line Tools</a>
</div>
<div class="sub">
<a title="Program Interface: Magick++" href="../Magick++/">Magick++</a>
</div>
-<div class="menu">
- <a title="Architecture" href="../www/architecture.html">Architecture</a>
-</div>
<div class="sep"></div>\r
<div class="menu">
<a title="Install from Source" href="../www/install-source.html">Install from Source</a>
<a title="Install from Source: Windows" href="../www/install-source.html#windows">Windows</a>
</div>
<div class="menu">
- <a title="Binary Releases" href="../www/binary-releases.html">Binary Releases</a>
-</div>
-<div class="sub">
- <a title="Binary Release: Unix" href="../www/binary-releases.html#unix">Unix</a>
-</div>
-<div class="sub">
- <a title="Binary Release: MacOS X" href="../www/binary-releases.html#macosx">Mac OS X</a>
-</div>
-<div class="sub">
- <a title="Binary Release: Windows" href="../www/binary-releases.html#windows">Windows</a>
+ <a title="Resources" href="../www/resources.html">Resources</a>
</div>
<div class="menu">
- <a title="Resources" href="../www/resources.html">Resources</a>
+ <a title="Architecture" href="../www/architecture.html">Architecture</a>
</div>
-<div class="sep"></div>\r
<div class="menu">
<a title="Download" href="../www/download.html">Download</a>
</div>
<div class="sponsbox">
<div class="sponsor">
- <a title="Sponsor: Webdesign Agentur" href="http://www.ventzke-partner.de">Webdesign Agentur</a><!-- 201101010480 invendio.de-->
+ <a title="Sponsor: Notebook Reparatur Berlin" href="http://www.notebook-reparaturen-berlin.de">Notebook Reparatur Berlin</a><!-- 2011040100025 gabi.schulze-->
</div>
<div class="sponsor">
- <a title="Sponsor: LVM Versicherung" href="http://www.neu-reich.de">LVM Versicherung</a><!-- 201101010480 -->
+ <a title="Sponsor: Druckerei" href="http://print24.com/de/">Druckerei</a><!-- 201110010720 -->
</div>
<div class="sponsor">
- <a title="Sponsor: Deko.net" href="http://www.deko.net">Deko.net</a><!-- 201101010600 Peterssen-->
+ <a title="Sponsor: Image Converter" href="http://www.batchphoto.com">Image Converter</a><!-- 201103010900 Bits Coffee-->
</div>
<div class="sponsor">
- <a title="Sponsor: Kredit" href="http://www.online-kredit-index.de">Kredit</a><!-- 201007010120 Buchhorn -->
+ <a title="Sponsor: Flyer drucken" href="http://www.online-druck.biz">Flyer drucken</a><!-- 201109010900 Floeter-->
</div>
<div class="sponsor">
- <a title="Sponsor: Druckerei" href="http://www.print24.de/">Druckerei</a><!-- 201009010720 -->
+ <a title="Sponsor: Webdesign Agentur" href="http://www.ventzke-partner.de">Webdesign Agentur</a><!-- 201101010480 invendio.de-->
</div>
<div class="sponsor">
- <a title="Sponsor: Druckerei Online" href="http://www.allesdruck.de">Druckerei Online</a><!-- 201012011200 allesdruck.de-->
+ <a title="Sponsor: LVM Versicherung" href="http://www.neu-reich.de">LVM Versicherung</a><!-- 201101010480 -->
</div>
<div class="sponsor">
- <a title="Sponsor: Online-Magazin" href="http://www.unkostenbeitrag.de/" title="Online-Magazin">Online-Magazin</a><!-- 20101101000200 -->
+ <a title="Sponsor: Diamonds are a Girls Best Friend" href="http://www.schmuck.org">Diamonds are a Girls Best Friend</a><!-- 201101010600 Peterssen-->
</div>
</div>
</div>
+</div>\r
\r
-\r
+<div class="eastbar">\r
+ <script type="text/javascript">\r
+ <!--\r
+ google_ad_client = "pub-3129977114552745";\r
+ google_ad_slot = "0574824969";\r
+ google_ad_width = 160;\r
+ google_ad_height = 600;\r
+ //-->\r
+ </script>\r
+ <script type="text/javascript"\r
+ src="http://pagead2.googlesyndication.com/pagead/show_ads.js">\r
+ </script>\r
</div>\r
\r
<div class="main">\r
<dt class="doc"> constants: </dt>
<dd> e, Epsilon, QuantumRange, QuantumScale, Opaque, Pi, Transparent</dd>
<dt class="doc"> Fx operators (in order of precedence): </dt>
- <dd> ^ (power), *, /, % (modulo), +, -,
+ <dd> ^ (power), unary -, *, /, % (modulo), +, -,
<<, >>, <, <=, >, >=, ==, !=,
& (bitwise AND), | (bitwise OR),
&& (logical AND), || (logical OR),
<dt class="doc"> math functions: </dt>
<dd> abs(), acos(), airy(), alt(), asin(), atan(), atan2(), ceil(), cos(), cosh(), debug(), exp(), floor(),
hypot(), int(), j0(), j1(), jinc(), ln(), log(), logtwo(), max(), min(), mod(), pow(), rand(), round(),
- sign(), sin(), sinc(), sinh(), sqrt(), tan(), tanh()</dd>
+ sign(), sin(), sinc(), sinh(), sqrt(), tan(), tanh(), trunc()</dd>
<dt class="doc"> channel functions: </dt>
<dd> channel(r,g,b,a), channel(c,m,y,k,a)</dd>
<dt class="doc"> color names:</dt>
<li> <kbd>sqrt(</kbd><em>x</em><kbd>)</kbd>: square root function</li>
<li> <kbd>tan(</kbd><em>x</em><kbd>)</kbd>: tangent function</li>
<li> <kbd>tanh(</kbd><em>x</em><kbd>)</kbd>: hyperbolic tangent function</li>
+<li> <kbd>trunc(</kbd><em>x</em><kbd>)</kbd>: round to integer, towards zero</li>
</ul>
<p>The expression semantics include these rules:</p>
<li>statements are assignments or the final expression to return</li>
<li>an assignment starts a statement, it is not an operator</li>
<li>assignments to built-ins do not throw an exception and have no effect; e.g. <kbd>r=3.0; r</kbd> returns the pixel red color value, not 3.0</li>
+<li>Unary operators have a lower priority than binary operators, that is, the unary minus (negation) has lower precedence than exponentiation, so -3^2 is interpreted as -(3^2) = -9. Use parentheses to clarify your intent (e.g. (-3)^2 = 9).</li>
+<li>Similarly, care must be exercised when using the slash ('/') symbol. The string of characters <em>1/2x</em> is interpreted as (1/2)x. The contrary interpretation should be written explicitly as 1/(2x). Again, the use of parentheses helps clarify the meaning and should be used whenever there is any chance of misinterpretation.</li>
</ul>
+
</div>
<h3>Source Images</h3>
<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert xc:'rgb(25%,50%,75%)' rose: -colorspace rgb \ <br/>
-format 'Red channel of NW corner of image # %[fx:t] is %[fx: s]' info:</span><span class='crtout'>Red channel of NW corner of image # 0 is 0.250004 <br/>
Red channel of NW corner of image # 1 is 0.188235</span></p>
+<p>Use <kbd>%[fxc: ]</kbd> if your expression is a constant (e.g. <kbd>%[fxc:page.x/2]</kbd>. The result is cached and the cached result returned rather than evaluating the expression each time.</p>
+
<p>The color-escape <kbd>%[pixel: ]</kbd> is evaluated once per image and per color channel in that image (<a href="../www/command-line-options.html#channel">-channel</a> is ignored), The values generated are then converted into a color string (a named color or hex color value). The symbols <kbd>i</kbd> and <kbd>j</kbd> are set to zero, and <kbd>s</kbd> and <kbd>t</kbd> refer to each successively current image and index.</p>
</div>
</div>\r
\r
<div id="linkbar">\r
- <!-- <span id="linkbar-west"> </span> -->\r
+ <span id="linkbar-west"> </span>\r
<span id="linkbar-center">\r
<a href="http://www.imagemagick.org/discourse-server/">Discourse Server</a> •\r
- <a href="http://www.imagemagick.org/MagickStudio/scripts/MagickStudio.cgi">Studio</a>\r
+
<a href="http://www.imagemagick.org/MagickStudio/scripts/MagickStudio.cgi">Studio</a>
\r </span>\r
<span id="linkbar-east"> </span>\r
</div>\r
<div class="footer">\r
- <span id="footer-west">© 1999-2010 ImageMagick Studio LLC</span>\r
+ <span id="footer-west">© 1999-2011 ImageMagick Studio LLC</span>\r
<span id="footer-east"> <a href="http://www.imagemagick.org/script/contact.php">Contact the Wizards</a></span>\r
</div>\r
<div style="clear: both; margin: 0; width: 100%; "></div>\r
+ <script type="text/javascript">\r
+ var _gaq = _gaq || [];\r
+ _gaq.push(['_setAccount', 'UA-17690367-1']);\r
+ _gaq.push(['_trackPageview']);\r
+\r
+ (function() {\r
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;\r
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';\r
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);\r
+ })();\r
+ </script>\r
</body>\r
</html>\r
projects / imagemagick / blobdiff