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213
cristydcca3fa2010-12-29 21:50:07 +0000214<h1>Customize ImageMagick With Resources</h1>
cristy3ed852e2009-09-05 21:47:34 +0000215<p class="navigation-index">[<a href="#configure">Configuration Files</a> &bull; <a href="#modules">Modules</a> &bull; <a href="#fonts">Fonts</a> &bull; <a href="#environment">Environment Variables</a>]</p>
216
217<div class="doc-section">
218<p>ImageMagick depends on a number of external resources including configuration files, loadable modules, fonts, and environment variables.</p>
219</div>
220
cristydcca3fa2010-12-29 21:50:07 +0000221<h2><a id="configure"></a>Configuration Files</h2>
cristy3ed852e2009-09-05 21:47:34 +0000222<div class="doc-section">
223
224<p>ImageMagick depends on a number of external configuration files detailed here:</p>
225
cristydcca3fa2010-12-29 21:50:07 +0000226<dl>
cristy3ed852e2009-09-05 21:47:34 +0000227<dt class="doc"><a href="../www/source/coder.xml">coder.xml</a></dt>
228 <dd>Associate an image format with the specified coder module.
229
230 <p>ImageMagick has a number of coder modules to support the reading and/or writing of an image format (e.g. JPEG). Some coder modules support more than one associated image format and the mapping between an associated format and its respective coder module is defined in this configuration file. For example, the PNG coder module not only supports the PNG image format, but the JNG and MNG formats as well.</p>
231 </dd>
232
233<dt class="doc"><a href="../www/source/colors.xml">colors.xml</a></dt>
234 <dd>Associate a color name with its red, green, blue, and alpha intensities.
235
236 <p>A number of command line options require a <a href="../www/color.html">color parameter</a>. It is often convenient to refer to a color by name (e.g. white) rather than by hex value (e.g. #fff). This file maps a color name to its equivalent red, green, blue, and alpha intensities (e.g. for white, red = 255, green = 255, blue = 255, and alpha = 0).</p>
237 </dd>
238
cristydcca3fa2010-12-29 21:50:07 +0000239<dt class="doc"><a id="configure.xml"/><a href="../www/source/configure.xml">configure.xml</a></dt>
cristy3ed852e2009-09-05 21:47:34 +0000240 <dd>Set ImageMagick build parameters and system-wide environment variables (e.g. MAGICK_TEMPORARY_PATH).
241 <p>
242 As ImageMagick is built, a number of build parameters are saved to this configuration file. They include the version, release date, dependent delegate libraries, and quantum depth among others.</p>
243 </dd>
244
245<dt class="doc"><a href="../www/source/delegates.xml">delegates.xml</a></dt>
246 <dd>Associate delegate programs with certain image formats.
247
248 <p>ImageMagick relies on a number of delegate programs to support certain image formats such as <a href="http://ufraw.sourceforge.net/">ufraw-batch</a> to read raw camera formats or <a href="http://www.cs.wisc.edu/~ghost/">Ghostscript</a> to read Postscript images. Use this configuration file to map an input or output format to an external delegate program.</p>
249 </dd>
250
251<dt class="doc"><a href="../www/source/english.xml">english.xml</a></dt>
cristydcca3fa2010-12-29 21:50:07 +0000252 <dd>Associate message tags with English translations.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000253
254<dt class="doc"><a href="../www/source/francais.xml">francais.xml</a></dt>
cristydcca3fa2010-12-29 21:50:07 +0000255 <dd>Associate message tags with French translations. </dd>
cristy3ed852e2009-09-05 21:47:34 +0000256
257<dt class="doc"><a href="../www/source/locale.xml">locale.xml</a></dt>
258 <dd>Associate message tags with a translation for your locale.
259
260 <p>ImageMagick has a number of informational, warning, and error messages that are represented as tags. Tags are short descriptions of a message such as
261 <em>FileNotFound</em> or <em>MemoryAllocationFailed</em>. This configuration file lists locales that have a translation for each tag recognized by ImageMagick. Currently only English and French translations are available in the <kbd>english.xml</kbd> and <kbd>francais.xml</kbd> configuration files.</p>
262 </dd>
263
264<dt class="doc"><a href="../www/source/log.xml">log.xml</a></dt>
265 <dd>Configure logging parameters.
266 <p>ImageMagick is capable of spewing copious amounts of informational or debugging statements. Use this file to configure how the information will appear in a log message and where you want the logging messages posted.</p>
267 </dd>
268
269<dt class="doc"><a href="../www/source/magic.xml">magic.xml</a></dt>
270 <dd>Associate an image format with a unique identifier.
271 <p>Many image formats have identifiers that uniquely identify a particular image format. For example, the GIF image format always begins with <kbd>GIF8</kbd> as the first 4 characters of the image. ImageMagick uses this information to quickly determine the type of image it is dealing with when it reads an image.</p>
272 </dd>
273
274<dt class="doc"><a href="../www/source/mime.xml">mime.xml</a></dt>
275 <dd>Associate an internet media type with a unique identifier.
276 <p>Many files and data streams have identifiers that uniquely identify a
277particular internet media type. For example, files in the "Corel Draw
278drawing" format (mime type="application/vnd.corel-draw") are associated with
279the filename pattern <kbd>*.cdr</kbd>, and also have an initial string of the
280characters "CDRXvrsn". ImageMagick uses combinations of this information,
281when available, to attempt to quickly determine the internet media type of a
282file or data stream.</p>
283</dd>
284
285<dt class="doc"><a href="../www/source/policy.xml">policy.xml</a></dt>
286 <dd>Configure ImageMagick policies.
cristyd75d5d12010-02-16 02:04:50 +0000287 <p>By default any coder, delegate, filter, or file path is permitted. Use a policy to deny access to, for example, the MPEG video delegate, or permit reading images from a file system but deny writing to that same file system. Or use the resource policy to set resource limits. Policies are useful for multi-user servers that want to limit the overall impact ImageMagick has on the system. For example, to limit the maximum image size in memory to 100MB:</p>
288
289<pre class="text">
290 &lt;policy domain="resource" name="area" value="100MB"/>
291</pre>
292
293<p>Any image larger than this area limit is cached to disk rather than memory.</p>
294
295<p>To limit the elapsed time of any ImageMagick command to 5 minutes, use this policy:</p>
296
297<pre class="text">
298 &lt;policy domain="resource" name="time" value="300"/>
299</pre>
cristy3ed852e2009-09-05 21:47:34 +0000300 </dd>
301
302<dt class="doc"><a href="../www/source/thresholds.xml">thresholds.xml</a></dt>
cristydcca3fa2010-12-29 21:50:07 +0000303 <dd>Set threshold maps for ordered posterized dither.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000304
cristydcca3fa2010-12-29 21:50:07 +0000305<dt class="doc"><a id="type.xml"></a><a href="../www/source/type.xml">type.xml</a></dt>
cristy3ed852e2009-09-05 21:47:34 +0000306 <dd>Configure fonts.
307 <p>Define the font name, family, foundry, style, format, metrics, and glyphs for any font you want to use within ImageMagick.</p>
308 </dd>
309
310<dt class="doc"><a href="../www/source/type-ghostscript.xml">type-ghostscript.xml</a></dt>
311 <dd>Configure <a href="http://www.cs.wisc.edu/~ghost/">Ghostscript</a> fonts.
312 <p>The Ghostscript package includes a number of fonts that can be accessed with ImageMagick.</p>
313 </dd>
314
315<dt class="doc"><a href="../www/source/type-windows.xml">type-windows.xml</a></dt>
316 <dd>Associate names with Windows font glyphs.</dd>
317
318</dl>
319
320<p>Under Unix and Linux, ImageMagick searches for each of the configuration files listed above by looking in the locations given below, in order, and loads them if found:</p>
321
322<pre class="text">
323 $MAGICK_CONFIGURE_PATH
cristy3cd7cc92011-04-01 01:00:28 +0000324 $PREFIX/etc/ImageMagick
cristyd48f07c2011-07-09 23:09:26 +0000325 $PREFIX/share/ImageMagick-6.7.1
cristy31fd8c42011-04-01 15:45:16 +0000326 $HOME/.magick/
cristy721a6932011-04-01 14:33:28 +0000327 &lt;<em>client path</em>&gt;/etc/ImageMagick/
cristy3ed852e2009-09-05 21:47:34 +0000328</pre>
329
330<p>The environmental variable $PREFIX is the default install path (e.g. <kbd>/usr/local</kbd>). The <em>client path</em> is the execution path of your ImageMagick client (e.g. <kbd>/usr/local</kbd>) .</p>
331
cristy075ad252010-10-30 21:56:17 +0000332<p>For the Unix or Linux pre-compiled uninstalled binary distributions, the configuration load order is:</p>
cristy3ed852e2009-09-05 21:47:34 +0000333
334<pre class="text">
335 $MAGICK_CONFIGURE_PATH
cristy3cd7cc92011-04-01 01:00:28 +0000336 $MAGICK_HOME/etc/ImageMagick
cristyd48f07c2011-07-09 23:09:26 +0000337 $MAGICK_HOME/share/ImageMagick-6.7.1
338 $PREFIX/share/ImageMagick-6.7.1
cristye9a32c32011-04-07 01:11:05 +0000339 $HOME/.magick/
cristy945bb352011-04-01 15:39:28 +0000340 &lt;<em>client path</em>&gt;/etc/ImageMagick/
cristy075ad252010-10-30 21:56:17 +0000341 &lt;<em>current directory</em>&gt;
cristy3ed852e2009-09-05 21:47:34 +0000342</pre>
343
344<p>Under Windows, ImageMagick searches for these configuration files in the following order, and loads them if found:</p>
345
346<pre class="text">
347 $MAGICK_CONFIGURE_PATH
348 &lt;<em>windows registry</em>&gt;
349 $PREFIX/config
350 $USERPROFILE/.magick/
351 &lt;<em>client path</em>&gt;
cristy3ed852e2009-09-05 21:47:34 +0000352</pre>
353
cristyd48f07c2011-07-09 23:09:26 +0000354<p>Above, $PREFIX is the default install path, typically <kbd>c:\\Program Files\\ImageMagick-6.7.1</kbd>.</p>
cristy3ed852e2009-09-05 21:47:34 +0000355
356<p>For an uninstalled Windows installation, the configuration load order is:</p>
357
358<pre class="text">
359 $MAGICK_CONFIGURE_PATH
360 $MAGICK_HOME
361 $USERPROFILE/.magick/
362 <em>client path</em>
363 &lt;<em>current directory</em>&gt;
364</pre>
365
366<p>If a configuration file cannot not be found, ImageMagick relies on built-in default values.</p>
367
368</div>
369
cristydcca3fa2010-12-29 21:50:07 +0000370<h2><a id="modules"></a>Modules</h2>
cristy3ed852e2009-09-05 21:47:34 +0000371<div class="doc-section">
372
cristye9a32c32011-04-07 01:11:05 +0000373<h4>Coders</h4>
374<p>An image coder (i.e. encoder / decoder) is responsible for registering, optionally classifying, optionally reading, optionally writing, and unregistering one image format (e.g. PNG, GIF, JPEG, etc.). ImageMagick searches for coders in the following order and it uses the first match found:</p>
cristy3ed852e2009-09-05 21:47:34 +0000375
376<pre class="text">
cristyd48f07c2011-07-09 23:09:26 +0000377 $MAGICK_HOME/lib/ImageMagick-6.7.1/modules-Q16/coders/
378 &lt;<em>client path</em>&gt;/../lib/ImageMagick-6.7.1/modules-Q16/coders/
379 $MAGICK_HOME/lib/ImageMagick-6.7.1/modules-Q16/coders
380 $MAGICK_HOME/share/ImageMagick-6.7.1/modules-Q16/coders
cristy3ed852e2009-09-05 21:47:34 +0000381 $HOME/.magick/
cristyd48f07c2011-07-09 23:09:26 +0000382 &lt;<em>client path</em>&gt;/lib/ImageMagick-6.7.1/modules-Q16/coders
cristy3ed852e2009-09-05 21:47:34 +0000383</pre>
384
cristye9a32c32011-04-07 01:11:05 +0000385<h4>Filters</h4>
386<p>ImageMagick provides a convenient mechanism for adding your own custom image processing algorithms. ImageMagick searches for filters in the following order and it uses the first match found:</p>
387<pre class="text">
cristyd48f07c2011-07-09 23:09:26 +0000388 $MAGICK_HOME/lib/ImageMagick-6.7.1/modules-Q16/filters/
389 &lt;<em>client path</em>&gt;/../lib/ImageMagick-6.7.1/modules-Q16/filters/
390 $MAGICK_HOME/lib/ImageMagick-6.7.1/modules-Q16/filters
391 $MAGICK_HOME/share/ImageMagick-6.7.1/modules-Q16/filters
cristye9a32c32011-04-07 01:11:05 +0000392 $HOME/.magick/
cristyd48f07c2011-07-09 23:09:26 +0000393 &lt;<em>client path</em>&gt;/lib/ImageMagick-6.7.1/modules-Q16/filters
cristye9a32c32011-04-07 01:11:05 +0000394</pre>
395
cristy3ed852e2009-09-05 21:47:34 +0000396</div>
397
cristydcca3fa2010-12-29 21:50:07 +0000398<h2><a id="fonts"></a>Fonts</h2>
cristy3ed852e2009-09-05 21:47:34 +0000399<div class="doc-section">
400
401<p>ImageMagick is able to load raw TrueType and Postscript font files. It searches for the font configuration file, <a href="#type.xml">type.xml</a>, in the following order, and loads them if found:</p>
402
403<pre class="text">
404 $MAGICK_CONFIGURE_PATH
cristy945bb352011-04-01 15:39:28 +0000405 $MAGICK_HOME/etc/ImageMagick/
cristyd48f07c2011-07-09 23:09:26 +0000406 $MAGICK_HOME/share/ImageMagick-6.7.1/
cristy3ed852e2009-09-05 21:47:34 +0000407 $HOME/.magick/
cristy945bb352011-04-01 15:39:28 +0000408 &lt;<em>client path</em>&gt;/etc/ImageMagick/
cristy3ed852e2009-09-05 21:47:34 +0000409 $MAGICK_FONT_PATH
410</pre>
411
412</div>
413
cristydcca3fa2010-12-29 21:50:07 +0000414<h2><a id="environment"></a>Environment Variables</h2>
cristy3ed852e2009-09-05 21:47:34 +0000415<div class="doc-section">
416
417<p>Environment variables recognized by ImageMagick include:</p>
418
cristydcca3fa2010-12-29 21:50:07 +0000419<dl>
cristy3ed852e2009-09-05 21:47:34 +0000420<dt class="doc">HOME</dt>
cristydcca3fa2010-12-29 21:50:07 +0000421 <dd>Set path to search for configuration files in <em>$HOME/.magick</em> if the directory exists.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000422<dt class="doc">LD_LIBRARY_PATH</dt>
cristydcca3fa2010-12-29 21:50:07 +0000423 <dd>Set path to the ImageMagick shareable libraries and other dependent libraries.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000424<dt class="doc">MAGICK_AREA_LIMIT</dt>
cristydcca3fa2010-12-29 21:50:07 +0000425 <dd>Set the maximum <em>width * height</em> of an image that can reside in the pixel cache memory.</dd>
426 <dd>Images that exceed the area limit are cached to disk (see <a href="#disk-limit">MAGICK_DISK_LIMIT</a>).</dd>
cristy3ed852e2009-09-05 21:47:34 +0000427<dt class="doc">MAGICK_CODER_FILTER_PATH</dt>
cristydcca3fa2010-12-29 21:50:07 +0000428 <dd>Set search path to use when searching for filter process modules (invoked via <a href="../www/command-line-options.html#process">-process</a>).</dd>
429 <dd>This path permits the user to extend ImageMagick's image processing functionality by adding loadable modules to a preferred location rather than copying them into the ImageMagick installation directory. The formatting of the search path is similar to operating system search paths (i.e. colon delimited for Unix, and semi-colon delimited for Microsoft Windows). This user specified search path is searched before trying the <a href="#modules">default search path</a>.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000430<dt class="doc">MAGICK_CODER_MODULE_PATH</dt>
cristydcca3fa2010-12-29 21:50:07 +0000431 <dd>Set path where ImageMagick can locate its coder modules.</dd>
432 <dd>This path permits the user to arbitrarily extend the image formats supported by ImageMagick by adding loadable coder modules from an preferred location rather than copying them into the ImageMagick installation directory. The formatting of the search path is similar to operating system search paths (i.e. colon delimited for Unix, and semi-colon delimited for Microsoft Windows). This user specified search path is searched before trying the <a href="#modules">default search path</a>.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000433<dt class="doc">MAGICK_CONFIGURE_PATH</dt>
cristydcca3fa2010-12-29 21:50:07 +0000434 <dd>Set path where ImageMagick can locate its configuration files</dd>
435 <dd>Use this search path to search for configuration (.xml) files. The formatting of the search path is similar to operating system search paths (i.e. colon delimited for Unix, and semi-colon delimited for Microsoft Windows). This user specified search path is searched before trying the <a href="#configure">default search path</a>.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000436<dt class="doc">MAGICK_DEBUG</dt>
cristydcca3fa2010-12-29 21:50:07 +0000437 <dd>Set debug options.</dd>
438 <dd>See <a href="../www/command-line-options.html#debug">-debug</a> for a description of debugging options.</dd>
439<dt class="doc"><a id="disk-limit"></a>MAGICK_DISK_LIMIT</dt>
440 <dd>Set maximum amount of disk space in bytes permitted for use by the pixel cache.</dd>
441 <dd>When this limit is exceeded, the pixel cache is not be created and an error message is returned.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000442<dt class="doc">MAGICK_FILE_LIMIT</dt>
cristydcca3fa2010-12-29 21:50:07 +0000443 <dd>Set maximum number of open pixel cache files.</dd>
444 <dd>When this limit is exceeded, any subsequent pixels cached to disk are closed and reopened on demand. This behavior permits a large number of images to be accessed simultaneously on disk, but with a speed penalty due to repeated open/close calls.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000445<dt class="doc">MAGICK_FONT_PATH</dt>
cristydcca3fa2010-12-29 21:50:07 +0000446 <dd>Set path ImageMagick searches for TrueType and Postscript Type1 font files.</dd>
447 <dd>This path is only consulted if a particular font file is not found in the current directory.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000448<dt class="doc">MAGICK_HOME</dt>
cristydcca3fa2010-12-29 21:50:07 +0000449 <dd>Set the path at the top of ImageMagick installation directory.</dd>
450 <dd>This path is consulted by <em>uninstalled</em> builds of ImageMagick which do not have their location hard-coded or set by an installer.</dd>
451<dt class="doc"><a id="map-limit"></a>MAGICK_MAP_LIMIT</dt>
452 <dd>Set maximum amount of memory map in bytes to allocate for the pixel cache.</dd>
cristyd43a46b2010-01-21 02:13:41 +0000453 <dd>When this limit is exceeded, the image pixels are cached to disk (see MAGICK_DISK_LIMIT).</dd>
cristy3ed852e2009-09-05 21:47:34 +0000454<dt class="doc">MAGICK_MEMORY_LIMIT</dt>
cristydcca3fa2010-12-29 21:50:07 +0000455 <dd>Set maximum amount of memory in bytes to allocate for the pixel cache from the heap.</dd>
456 <dd>When this limit is exceeded, the image pixels are cached to memory-mapped disk (see <a href="#map-limit">MAGICK_MAP_LIMIT</a>).</dd>
cristyd43a46b2010-01-21 02:13:41 +0000457<dt class="doc">MAGICK_PRECISION</dt>
cristydcca3fa2010-12-29 21:50:07 +0000458 <dd>Set the maximum number of significant digits to be printed.</dd>
cristy5063d812010-10-19 16:28:10 +0000459<dt class="doc">MAGICK_SYNCHRONIZE</dt>
cristydcca3fa2010-12-29 21:50:07 +0000460 <dd>Set to true to synchronize image to storage device.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000461<dt class="doc">MAGICK_TEMPORARY_PATH</dt>
cristydcca3fa2010-12-29 21:50:07 +0000462 <dd>Set path to store temporary files.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000463<dt class="doc">MAGICK_THREAD_LIMIT</dt>
cristydcca3fa2010-12-29 21:50:07 +0000464 <dd>Set maximum parallel threads.</dd>
465 <dd>Many ImageMagick algorithms run in parallel on multi-processor systems. Use this enviroment variable to set the maximum number of threads that are permitted to run in parallel.</dd>
cristyb15553d2010-07-03 22:53:14 +0000466<dt class="doc">MAGICK_THROTTLE</dt>
cristydcca3fa2010-12-29 21:50:07 +0000467 <dd>Periodically yield the CPU for at least the time specified in milliseconds.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000468<dt class="doc">MAGICK_TIME_LIMIT</dt>
cristydcca3fa2010-12-29 21:50:07 +0000469 <dd>Set maximum time in seconds.</dd>
cristyd43a46b2010-01-21 02:13:41 +0000470 <dd>When this limit is exceeded, an exception is thrown and processing stops.</dd>
cristy3ed852e2009-09-05 21:47:34 +0000471</dl>
472</div>
cristy3eaa0ef2010-03-06 20:35:26 +0000473
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