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<H1>../gegl/gegl-plugin.h</H1>

<PRE>
<I><FONT COLOR="#B22222">/* This file is the public operation GEGL API, this API will change to much
 * larger degrees than the api provided by gegl.h
 *
 * GEGL is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * GEGL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with GEGL; if not, see &lt;http://www.gnu.org/licenses/&gt;.
 *
 * 2000-2008 Øyvind Kolås.
 */</FONT></I>

#<B><FONT COLOR="#5F9EA0">ifndef</FONT></B> <FONT COLOR="#B8860B">__GEGL_PLUGIN_H__</FONT>
#<B><FONT COLOR="#5F9EA0">define</FONT></B> <FONT COLOR="#B8860B">__GEGL_PLUGIN_H__</FONT>

#<B><FONT COLOR="#5F9EA0">ifdef</FONT></B> <FONT COLOR="#B8860B">HAVE_CONFIG_H</FONT>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&quot;config.h&quot;</FONT></B>
#<B><FONT COLOR="#5F9EA0">endif</FONT></B>

#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;string.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;glib-object.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;gegl.h&gt;</FONT></B>

G_BEGIN_DECLS

<I><FONT COLOR="#B22222">/* Extra types needed when coding operations */</FONT></I>
<B><FONT COLOR="#228B22">typedef</FONT></B> <B><FONT COLOR="#228B22">struct</FONT></B> _GeglOperation        GeglOperation;
<B><FONT COLOR="#228B22">typedef</FONT></B> <B><FONT COLOR="#228B22">struct</FONT></B> _GeglOperationContext GeglOperationContext;
<B><FONT COLOR="#228B22">typedef</FONT></B> <B><FONT COLOR="#228B22">struct</FONT></B> _GeglPad              GeglPad;
<B><FONT COLOR="#228B22">typedef</FONT></B> <B><FONT COLOR="#228B22">struct</FONT></B> _GeglConnection       GeglConnection;

#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;gegl-matrix.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;gegl-utils.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;gegl-buffer.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;gegl-paramspecs.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;gmodule.h&gt;</FONT></B>

<B><FONT COLOR="#228B22">typedef</FONT></B> <B><FONT COLOR="#228B22">struct</FONT></B> _GeglModule     GeglModule;
<B><FONT COLOR="#228B22">typedef</FONT></B> <B><FONT COLOR="#228B22">struct</FONT></B> _GeglModuleInfo GeglModuleInfo;
<B><FONT COLOR="#228B22">typedef</FONT></B> <B><FONT COLOR="#228B22">struct</FONT></B> _GeglModuleDB   GeglModuleDB;

<I><FONT COLOR="#B22222">/***
 * Writing GEGL operations
 *
 */</FONT></I>

<I><FONT COLOR="#B22222">/*#include &lt;geglmodule.h&gt;*/</FONT></I>

<I><FONT COLOR="#B22222">/*  increment the ABI version each time one of the following changes:
 *
 *  - the libgeglmodule implementation (if the change affects modules).
 *  - GeglOperation or one of it's base classes changes. (XXX:-
 *    should be extended so a range of abi versions are accepted.
 */</FONT></I>

#<B><FONT COLOR="#5F9EA0">define</FONT></B> <FONT COLOR="#B8860B">GEGL_MODULE_ABI_VERSION</FONT> 0x000A

<B><FONT COLOR="#228B22">struct</FONT></B> _GeglModuleInfo
{
  guint32  abi_version;
};

GType <B><FONT COLOR="#0000FF">gegl_module_register_type</FONT></B> (GTypeModule     *module,
                                 GType            parent_type,
                                 <B><FONT COLOR="#228B22">const</FONT></B> gchar     *type_name,
                                 <B><FONT COLOR="#228B22">const</FONT></B> GTypeInfo *type_info,
                                 GTypeFlags       flags);

gint            <B><FONT COLOR="#0000FF">gegl_operation_context_get_level</FONT></B>  (GeglOperationContext *self);
GeglBuffer     *<B><FONT COLOR="#0000FF">gegl_operation_context_get_source</FONT></B> (GeglOperationContext *self,
                                                   <B><FONT COLOR="#228B22">const</FONT></B> gchar          *padname);
GeglBuffer     *<B><FONT COLOR="#0000FF">gegl_operation_context_get_target</FONT></B> (GeglOperationContext *self,
                                                   <B><FONT COLOR="#228B22">const</FONT></B> gchar          *padname);
<B><FONT COLOR="#228B22">void</FONT></B>            <B><FONT COLOR="#0000FF">gegl_operation_context_set_object</FONT></B> (GeglOperationContext *context,
                                                   <B><FONT COLOR="#228B22">const</FONT></B> gchar          *padname,
                                                   GObject              *data);
<B><FONT COLOR="#228B22">void</FONT></B>            <B><FONT COLOR="#0000FF">gegl_operation_context_take_object</FONT></B>(GeglOperationContext *context,
                                                   <B><FONT COLOR="#228B22">const</FONT></B> gchar          *padname,
                                                   GObject              *data);
GObject        *<B><FONT COLOR="#0000FF">gegl_operation_context_get_object</FONT></B> (GeglOperationContext *context,
                                                   <B><FONT COLOR="#228B22">const</FONT></B> gchar          *padname);

<B><FONT COLOR="#228B22">void</FONT></B>            <B><FONT COLOR="#0000FF">gegl_extension_handler_register</FONT></B>    (<B><FONT COLOR="#228B22">const</FONT></B> gchar         *extension,
                                                    <B><FONT COLOR="#228B22">const</FONT></B> gchar         *handler);
<B><FONT COLOR="#228B22">void</FONT></B>            gegl_extension_handler_register_saver
                                                   (<B><FONT COLOR="#228B22">const</FONT></B> gchar         *extension,
                                                    <B><FONT COLOR="#228B22">const</FONT></B> gchar         *handler);
<B><FONT COLOR="#228B22">const</FONT></B> gchar   * <B><FONT COLOR="#0000FF">gegl_extension_handler_get</FONT></B>         (<B><FONT COLOR="#228B22">const</FONT></B> gchar         *extension);
<B><FONT COLOR="#228B22">const</FONT></B> gchar   * <B><FONT COLOR="#0000FF">gegl_extension_handler_get_saver</FONT></B>   (<B><FONT COLOR="#228B22">const</FONT></B> gchar         *extension);


<I><FONT COLOR="#B22222">/* code template utility, updates the jacobian matrix using
 * a user defined mapping function for displacement, example
 * with an identity transform (note that for the identity
 * transform this is massive computational overhead that can
 * be skipped by passing NULL to the sampler.
 *
 * #define gegl_unmap(x,y,dx,dy) { dx=x; dy=y; }
 *
 * gegl_sampler_compute_scale (scale, x, y);
 * gegl_unmap(x,y,sample_x,sample_y);
 * gegl_buffer_sample (buffer, sample_x, sample_y, scale, dest, format,
 *                     GEGL_SAMPLER_LOHALO);
 *
 * #undef gegl_unmap      // IMPORTANT undefine map macro
 */</FONT></I>
#<B><FONT COLOR="#5F9EA0">define</FONT></B> <B><FONT COLOR="#0000FF">gegl_sampler_compute_scale</FONT></B>(matrix, x, y) \
{                                       \
  float ax, ay, bx, by;                 \
  gegl_unmap(x + 0.5, y, ax, ay);       \
  gegl_unmap(x - 0.5, y, bx, by);       \
  matrix.coeff[0][0] = ax - bx;         \
  matrix.coeff[1][0] = ay - by;         \
  gegl_unmap(x, y + 0.5, ax, ay);       \
  gegl_unmap(x, y - 0.5, bx, by);       \
  matrix.coeff[0][1] = ax - bx;         \
  matrix.coeff[1][1] = ay - by;         \
}

<B><FONT COLOR="#228B22">typedef</FONT></B> <B><FONT COLOR="#228B22">struct</FONT></B>
{
  GObject       parent_instance;
  <B><FONT COLOR="#228B22">void</FONT></B> (* get) (GeglSampler *self,
                gdouble      x,
                gdouble      y,
                GeglMatrix2 *scale,
                <B><FONT COLOR="#228B22">void</FONT></B>        *output);
} SamplerMock;


#<B><FONT COLOR="#5F9EA0">define</FONT></B> <B><FONT COLOR="#0000FF">gegl_sampler_get</FONT></B>(sampler,x,y,scale,dest) \
  ((SamplerMock*)(sampler))-&gt;get((sampler),(x),(y),(scale),(dest))

#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;glib-object.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;babl/babl.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-filter.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-area-filter.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-point-filter.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-composer.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-composer3.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-point-composer.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-point-composer3.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-point-render.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-temporal.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-source.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-sink.h&gt;</FONT></B>
#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;operation/gegl-operation-meta.h&gt;</FONT></B>

#<B><FONT COLOR="#5F9EA0">include</FONT></B> <B><FONT COLOR="#BC8F8F">&lt;gegl-lookup.h&gt;</FONT></B>

G_END_DECLS
#<B><FONT COLOR="#5F9EA0">endif</FONT></B>  <I><FONT COLOR="#B22222">/* __GEGL_PLUGIN_H__ */</FONT></I>
</PRE>
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source-git / gegl

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