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11 <title>ImageMagick: MagickCore, C API for ImageMagick: Loadable Modules</title>
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154 <p class="navigation-index">[<a href="#AcquireModuleInfo">AcquireModuleInfo</a> • <a href="#DestroyModuleList">DestroyModuleList</a> • <a href="#GetModuleInfo">GetModuleInfo</a> • <a href="#GetModuleInfoList">GetModuleInfoList</a> • <a href="#GetModuleList">GetModuleList</a> • <a href="#GetMagickModulePath">GetMagickModulePath</a> • <a href="#InvokeDynamicImageFilter">InvokeDynamicImageFilter</a> • <a href="#ListModuleInfo">ListModuleInfo</a> • <a href="#OpenModule">OpenModule</a> • <a href="#OpenModules">OpenModules</a> • <a href="#RegisterModule">RegisterModule</a> • <a href="#TagToCoderModuleName">TagToCoderModuleName</a> • <a href="#TagToFilterModuleName">TagToFilterModuleName</a> • <a href="#TagToModuleName">TagToModuleName</a> • <a href="#UnregisterModule">UnregisterModule</a>]</p>
156 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
157 _8c.html" target="source" name="AcquireModuleInfo">AcquireModuleInfo</a></h2>
158 <div class="doc-section">
160 <p>AcquireModuleInfo() allocates the ModuleInfo structure.</p></ol>
162 <p>The format of the AcquireModuleInfo method is:</p>
165 ModuleInfo *AcquireModuleInfo(const char *path,const char *tag)
168 <p>A description of each parameter follows:</p></ol>
171 <ol><p>the path associated with the tag.</p></ol>
174 <ol><p>a character string that represents the image format we are looking for.</p></ol>
177 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
178 _8c.html" target="source" name="DestroyModuleList">DestroyModuleList</a></h2>
179 <div class="doc-section">
181 <p>DestroyModuleList() unregisters any previously loaded modules and exits the module loaded environment.</p></ol>
183 <p>The format of the DestroyModuleList module is:</p>
186 void DestroyModuleList(void)
190 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
191 _8c.html" target="source" name="GetModuleInfo">GetModuleInfo</a></h2>
192 <div class="doc-section">
194 <p>GetModuleInfo() returns a pointer to a ModuleInfo structure that matches the specified tag. If tag is NULL, the head of the module list is returned. If no modules are loaded, or the requested module is not found, NULL is returned.</p></ol>
196 <p>The format of the GetModuleInfo module is:</p>
199 ModuleInfo *GetModuleInfo(const char *tag,ExceptionInfo *exception)
202 <p>A description of each parameter follows:</p></ol>
205 <ol><p>a character string that represents the image format we are looking for.</p></ol>
208 <ol><p>return any errors or warnings in this structure.</p></ol>
211 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
212 _8c.html" target="source" name="GetModuleInfoList">GetModuleInfoList</a></h2>
213 <div class="doc-section">
215 <p>GetModuleInfoList() returns any modules that match the specified pattern.</p></ol>
217 <p>The format of the GetModuleInfoList function is:</p>
220 const ModuleInfo **GetModuleInfoList(const char *pattern,
221 unsigned long *number_modules,ExceptionInfo *exception)
224 <p>A description of each parameter follows:</p></ol>
227 <ol><p>Specifies a pointer to a text string containing a pattern.</p></ol>
229 <h5>number_modules</h5>
230 <ol><p>This integer returns the number of modules in the list.</p></ol>
233 <ol><p>return any errors or warnings in this structure.</p></ol>
236 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
237 _8c.html" target="source" name="GetModuleList">GetModuleList</a></h2>
238 <div class="doc-section">
240 <p>GetModuleList() returns any image format modules that match the specified pattern.</p></ol>
242 <p>The format of the GetModuleList function is:</p>
245 char **GetModuleList(const char *pattern,unsigned long *number_modules,
246 ExceptionInfo *exception)
249 <p>A description of each parameter follows:</p></ol>
252 <ol><p>Specifies a pointer to a text string containing a pattern.</p></ol>
254 <h5>number_modules</h5>
255 <ol><p>This integer returns the number of modules in the list.</p></ol>
258 <ol><p>return any errors or warnings in this structure.</p></ol>
261 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
262 _8c.html" target="source" name="GetMagickModulePath">GetMagickModulePath</a></h2>
263 <div class="doc-section">
265 <p>GetMagickModulePath() finds a module with the specified module type and filename.</p></ol>
267 <p>The format of the GetMagickModulePath module is:</p>
270 MagickBooleanType GetMagickModulePath(const char *filename,
271 MagickModuleType module_type,char *path,ExceptionInfo *exception)
274 <p>A description of each parameter follows:</p></ol>
277 <ol><p>the module file name.</p></ol>
280 <ol><p>the module type: MagickImageCoderModule or MagickImageFilterModule.</p></ol>
283 <ol><p>the path associated with the filename.</p></ol>
286 <ol><p>return any errors or warnings in this structure.</p></ol>
289 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
290 _8c.html" target="source" name="InvokeDynamicImageFilter">InvokeDynamicImageFilter</a></h2>
291 <div class="doc-section">
293 <p>InvokeDynamicImageFilter() invokes a dynamic image filter.</p></ol>
295 <p>The format of the InvokeDynamicImageFilter module is:</p>
298 MagickBooleanType InvokeDynamicImageFilter(const char *tag,Image **image,
299 const int argc,const char **argv,ExceptionInfo *exception)
302 <p>A description of each parameter follows:</p></ol>
305 <ol><p>a character string that represents the name of the particular module.</p></ol>
308 <ol><p>the image.</p></ol>
311 <ol><p>a pointer to an integer describing the number of elements in the argument vector.</p></ol>
314 <ol><p>a pointer to a text array containing the command line arguments.</p></ol>
317 <ol><p>return any errors or warnings in this structure.</p></ol>
320 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
321 _8c.html" target="source" name="ListModuleInfo">ListModuleInfo</a></h2>
322 <div class="doc-section">
324 <p>ListModuleInfo() lists the module info to a file.</p></ol>
326 <p>The format of the ListModuleInfo module is:</p>
329 MagickBooleanType ListModuleInfo(FILE *file,ExceptionInfo *exception)
332 <p>A description of each parameter follows.</p></ol>
335 <ol><p>An pointer to a FILE.</p></ol>
338 <ol><p>return any errors or warnings in this structure.</p></ol>
341 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
342 _8c.html" target="source" name="OpenModule">OpenModule</a></h2>
343 <div class="doc-section">
345 <p>OpenModule() loads a module, and invokes its registration module. It returns MagickTrue on success, and MagickFalse if there is an error.</p></ol>
347 <p>The format of the OpenModule module is:</p>
350 MagickBooleanType OpenModule(const char *module,ExceptionInfo *exception)
353 <p>A description of each parameter follows:</p></ol>
356 <ol><p>a character string that indicates the module to load.</p></ol>
359 <ol><p>return any errors or warnings in this structure.</p></ol>
362 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
363 _8c.html" target="source" name="OpenModules">OpenModules</a></h2>
364 <div class="doc-section">
366 <p>OpenModules() loads all available modules.</p></ol>
368 <p>The format of the OpenModules module is:</p>
371 MagickBooleanType OpenModules(ExceptionInfo *exception)
374 <p>A description of each parameter follows:</p></ol>
377 <ol><p>return any errors or warnings in this structure.</p></ol>
380 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
381 _8c.html" target="source" name="RegisterModule">RegisterModule</a></h2>
382 <div class="doc-section">
384 <p>RegisterModule() adds an entry to the module list. It returns a pointer to the registered entry on success.</p></ol>
386 <p>The format of the RegisterModule module is:</p>
389 ModuleInfo *RegisterModule(const ModuleInfo *module_info,
390 ExceptionInfo *exception)
393 <p>A description of each parameter follows:</p></ol>
396 <ol><p>a pointer to the registered entry is returned.</p></ol>
399 <ol><p>a pointer to the ModuleInfo structure to register.</p></ol>
402 <ol><p>return any errors or warnings in this structure.</p></ol>
405 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
406 _8c.html" target="source" name="TagToCoderModuleName">TagToCoderModuleName</a></h2>
407 <div class="doc-section">
409 <p>TagToCoderModuleName() munges a module tag and obtains the filename of the corresponding module.</p></ol>
411 <p>The format of the TagToCoderModuleName module is:</p>
414 char *TagToCoderModuleName(const char *tag,char *name)
417 <p>A description of each parameter follows:</p></ol>
420 <ol><p>a character string representing the module tag.</p></ol>
423 <ol><p>return the module name here.</p></ol>
426 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
427 _8c.html" target="source" name="TagToFilterModuleName">TagToFilterModuleName</a></h2>
428 <div class="doc-section">
430 <p>TagToFilterModuleName() munges a module tag and returns the filename of the corresponding filter module.</p></ol>
432 <p>The format of the TagToFilterModuleName module is:</p>
435 void TagToFilterModuleName(const char *tag,char name)
438 <p>A description of each parameter follows:</p></ol>
441 <ol><p>a character string representing the module tag.</p></ol>
444 <ol><p>return the filter name here.</p></ol>
447 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
448 _8c.html" target="source" name="TagToModuleName">TagToModuleName</a></h2>
449 <div class="doc-section">
451 <p>TagToModuleName() munges the module tag name and returns an upper-case tag name as the input string, and a user-provided format.</p></ol>
453 <p>The format of the TagToModuleName module is:</p>
456 TagToModuleName(const char *tag,const char *format,char *module)
459 <p>A description of each parameter follows:</p></ol>
462 <ol><p>the module tag.</p></ol>
465 <ol><p>a sprintf-compatible format string containing s where the upper-case tag name is to be inserted.</p></ol>
468 <ol><p>pointer to a destination buffer for the formatted result.</p></ol>
471 <h2><a href="http://www.imagemagick.org/api/MagickCore/module
472 _8c.html" target="source" name="UnregisterModule">UnregisterModule</a></h2>
473 <div class="doc-section">
475 <p>UnregisterModule() unloads a module, and invokes its de-registration module. Returns MagickTrue on success, and MagickFalse if there is an error.</p></ol>
477 <p>The format of the UnregisterModule module is:</p>
480 MagickBooleanType UnregisterModule(const ModuleInfo *module_info,
481 ExceptionInfo *exception)
484 <p>A description of each parameter follows:</p></ol>
487 <ol><p>the module info.</p></ol>
490 <ol><p>return any errors or warnings in this structure.</p></ol>
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