/* This file is part of GEGL
*
* 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 <http://www.gnu.org/licenses/>.
*
* Copyright 2006 Øyvind Kolås
*/
#include "config.h"
#include <glib-object.h>
#include <string.h>
#include "gegl.h"
#include "gegl-types-internal.h"
#include "gegl-operation-composer.h"
#include "gegl-utils.h"
#include "graph/gegl-node.h"
#include "graph/gegl-connection.h"
#include "graph/gegl-pad.h"
#include "buffer/gegl-region.h"
#include "buffer/gegl-buffer.h"
enum
{
PROP_0,
PROP_OUTPUT,
PROP_INPUT,
PROP_AUX
};
static void get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static gboolean gegl_operation_composer_process (GeglOperation *operation,
GeglOperationContext *context,
const gchar *output_prop,
const GeglRectangle *result,
gint level);
static void attach (GeglOperation *operation);
static GeglNode*detect (GeglOperation *operation,
gint x,
gint y);
static GeglRectangle get_bounding_box (GeglOperation *self);
static GeglRectangle get_required_for_output (GeglOperation *self,
const gchar *input_pad,
const GeglRectangle *roi);
G_DEFINE_TYPE (GeglOperationComposer, gegl_operation_composer,
GEGL_TYPE_OPERATION)
static void
gegl_operation_composer_class_init (GeglOperationComposerClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
object_class->set_property = set_property;
object_class->get_property = get_property;
operation_class->process = gegl_operation_composer_process;
operation_class->attach = attach;
operation_class->detect = detect;
operation_class->get_bounding_box = get_bounding_box;
operation_class->get_required_for_output = get_required_for_output;
g_object_class_install_property (object_class, PROP_OUTPUT,
g_param_spec_object ("output",
"Output",
"Output pad for generated image buffer.",
GEGL_TYPE_BUFFER,
G_PARAM_READABLE |
GEGL_PARAM_PAD_OUTPUT));
g_object_class_install_property (object_class, PROP_INPUT,
g_param_spec_object ("input",
"Input",
"Input pad, for image buffer input.",
GEGL_TYPE_BUFFER,
G_PARAM_READWRITE |
GEGL_PARAM_PAD_INPUT));
g_object_class_install_property (object_class, PROP_AUX,
g_param_spec_object ("aux",
"Input",
"Auxiliary image buffer input pad.",
GEGL_TYPE_BUFFER,
G_PARAM_READWRITE |
GEGL_PARAM_PAD_INPUT));
}
static void
gegl_operation_composer_init (GeglOperationComposer *self)
{
}
static void
attach (GeglOperation *self)
{
GeglOperation *operation = GEGL_OPERATION (self);
GObjectClass *object_class = G_OBJECT_GET_CLASS (self);
gegl_operation_create_pad (operation,
g_object_class_find_property (object_class,
"output"));
gegl_operation_create_pad (operation,
g_object_class_find_property (object_class,
"input"));
gegl_operation_create_pad (operation,
g_object_class_find_property (object_class,
"aux"));
}
static void
get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
}
static void
set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
}
static gboolean
gegl_operation_composer_process (GeglOperation *operation,
GeglOperationContext *context,
const gchar *output_prop,
const GeglRectangle *result,
gint level)
{
GeglOperationComposerClass *klass = GEGL_OPERATION_COMPOSER_GET_CLASS (operation);
GeglBuffer *input;
GeglBuffer *aux;
GeglBuffer *output;
gboolean success = FALSE;
if (strcmp (output_prop, "output"))
{
g_warning ("requested processing of %s pad on a composer", output_prop);
return FALSE;
}
input = gegl_operation_context_get_source (context, "input");
aux = gegl_operation_context_get_source (context, "aux");
output = gegl_operation_context_get_target (context, "output");
/* A composer with a NULL aux, can still be valid, the
* subclass has to handle it.
*/
if (input != NULL ||
aux != NULL)
{
success = klass->process (operation, input, aux, output, result, level);
if (output == GEGL_BUFFER (operation->node->cache))
gegl_cache_computed (operation->node->cache, result);
if (input)
g_object_unref (input);
if (aux)
g_object_unref (aux);
}
else
{
g_warning ("%s received NULL input and aux",
gegl_node_get_debug_name (operation->node));
}
return success;
}
static GeglRectangle
get_bounding_box (GeglOperation *self)
{
GeglRectangle result = { 0, 0, 0, 0 };
GeglRectangle *in_rect = gegl_operation_source_get_bounding_box (self, "input");
GeglRectangle *aux_rect = gegl_operation_source_get_bounding_box (self, "aux");
if (!in_rect)
{
if (aux_rect)
return *aux_rect;
return result;
}
if (aux_rect)
{
gegl_rectangle_bounding_box (&result, in_rect, aux_rect);
}
else
{
return *in_rect;
}
return result;
}
static GeglRectangle
get_required_for_output (GeglOperation *self,
const gchar *input_pad,
const GeglRectangle *roi)
{
return *roi;
}
static GeglNode *
detect (GeglOperation *operation,
gint x,
gint y)
{
GeglNode *input_node = gegl_operation_get_source_node (operation, "input");
GeglNode *aux_node = gegl_operation_get_source_node (operation, "aux");
if (input_node)
input_node = gegl_node_detect (input_node, x, y);
if (aux_node)
aux_node = gegl_node_detect (aux_node, x, y);
if (aux_node)
return aux_node;
if (input_node)
return input_node;
return NULL;
}