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/* This file is an image processing operation for GEGL
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*
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* GEGL is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* GEGL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with GEGL; if not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2006 Øyvind Kolås <pippin@gimp.org>
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*/
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#include "config.h"
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#include <glib/gi18n-lib.h>
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#ifdef GEGL_CHANT_PROPERTIES
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gegl_chant_object(buffer, _("Input buffer"),
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_("The GeglBuffer to load into the pipeline"))
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#else
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#define GEGL_CHANT_TYPE_SOURCE
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#define GEGL_CHANT_C_FILE "buffer-source.c"
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#include "gegl-chant.h"
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static void buffer_changed (GeglBuffer *buffer,
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const GeglRectangle *rect,
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gpointer userdata)
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{
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gegl_operation_invalidate (GEGL_OPERATION (userdata), rect, FALSE);
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}
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static GeglRectangle
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get_bounding_box (GeglOperation *operation)
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{
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GeglRectangle result = {0,0,0,0};
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GeglChantO *o = GEGL_CHANT_PROPERTIES (operation);
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if (!o->buffer)
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{
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return result;
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}
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result = *gegl_buffer_get_extent (GEGL_BUFFER (o->buffer));
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return result;
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}
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static gboolean
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process (GeglOperation *operation,
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GeglOperationContext *context,
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const gchar *output_pad,
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const GeglRectangle *result,
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gint level)
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{
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GeglChantO *o = GEGL_CHANT_PROPERTIES (operation);
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if (o->buffer)
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{
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if (!o->chant_data)
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{
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o->chant_data = (void*)0xf00;
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g_signal_connect (o->buffer, "changed",
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G_CALLBACK(buffer_changed), operation);
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}
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g_object_ref (o->buffer); /* Add an extra reference, since
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* gegl_operation_set_data is
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* stealing one.
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*/
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/* override core behaviour, by resetting the buffer in the operation_context */
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gegl_operation_context_take_object (context, "output",
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G_OBJECT (o->buffer));
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}
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return TRUE;
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}
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static void
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dispose (GObject *object)
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{
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GeglChantO *o = GEGL_CHANT_PROPERTIES (object);
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if (o->buffer)
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{
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g_object_unref (o->buffer);
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o->buffer = NULL;
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}
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G_OBJECT_CLASS (gegl_chant_parent_class)->dispose (object);
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}
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static void
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gegl_chant_class_init (GeglChantClass *klass)
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{
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GeglOperationClass *operation_class;
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operation_class = GEGL_OPERATION_CLASS (klass);
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operation_class->process = process;
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operation_class->get_bounding_box = get_bounding_box;
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G_OBJECT_CLASS (klass)->dispose = dispose;
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gegl_operation_class_set_keys (operation_class,
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"name", "gegl:buffer-source",
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"categories", "programming:input",
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"description", _("A source that uses an in-memory GeglBuffer, for use internally by GEGL."),
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NULL);
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operation_class->no_cache = TRUE;
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}
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#endif
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