[gimp] app: clean up and build the histogram op gift

[Michael Natterer <mitch src gnome org>]

commit cadd54823b7fbea503ee7da2d6fe0dcdbb93d9c3
Author: Michael Natterer <mitch gimp org>
Date:   Sun Apr 15 00:35:44 2012 +0200

    app: clean up and build the histogram op gift

 app/gegl/Makefile.am                     |    2 +
 app/gegl/gimp-gegl-types.h               |    1 +
 app/gegl/gimp-gegl.c                     |    2 +
 app/gegl/gimp-operation-histogram-sink.c |  144 ---------------------------
 app/gegl/gimp-operation-histogram-sink.h |   43 --------
 app/gegl/gimpoperationhistogramsink.c    |  159 ++++++++++++++++++++++++++++++
 app/gegl/gimpoperationhistogramsink.h    |   53 ++++++++++
 7 files changed, 217 insertions(+), 187 deletions(-)
---
diff --git a/app/gegl/Makefile.am b/app/gegl/Makefile.am
index 1f2c260..6e9d2ef 100644
--- a/app/gegl/Makefile.am
+++ b/app/gegl/Makefile.am
@@ -64,6 +64,8 @@ libappgegl_a_sources = \
 	gimpoperationequalize.h			\
 	gimpoperationgrow.c			\
 	gimpoperationgrow.h			\
+	gimpoperationhistogramsink.c		\
+	gimpoperationhistogramsink.h		\
 	gimpoperationsetalpha.c			\
 	gimpoperationsetalpha.h			\
 	gimpoperationshapeburst.c		\
diff --git a/app/gegl/gimp-gegl-types.h b/app/gegl/gimp-gegl-types.h
index be6512f..85dc530 100644
--- a/app/gegl/gimp-gegl-types.h
+++ b/app/gegl/gimp-gegl-types.h
@@ -32,6 +32,7 @@ typedef struct _GimpOperationCageCoefCalc       GimpOperationCageCoefCalc;
 typedef struct _GimpOperationCageTransform      GimpOperationCageTransform;
 typedef struct _GimpOperationEqualize           GimpOperationEqualize;
 typedef struct _GimpOperationGrow               GimpOperationGrow;
+typedef struct _GimpOperationHistogramSink      GimpOperationHistogramSink;
 typedef struct _GimpOperationSetAlpha           GimpOperationSetAlpha;
 typedef struct _GimpOperationShapeburst         GimpOperationShapeburst;
 typedef struct _GimpOperationShrink             GimpOperationShrink;
diff --git a/app/gegl/gimp-gegl.c b/app/gegl/gimp-gegl.c
index 9d7a1e5..577bef3 100644
--- a/app/gegl/gimp-gegl.c
+++ b/app/gegl/gimp-gegl.c
@@ -37,6 +37,7 @@
 #include "gimpoperationcagetransform.h"
 #include "gimpoperationequalize.h"
 #include "gimpoperationgrow.h"
+#include "gimpoperationhistogramsink.h"
 #include "gimpoperationsetalpha.h"
 #include "gimpoperationshapeburst.h"
 #include "gimpoperationshrink.h"
@@ -138,6 +139,7 @@ gimp_gegl_init (Gimp *gimp)
   g_type_class_ref (GIMP_TYPE_OPERATION_CAGE_TRANSFORM);
   g_type_class_ref (GIMP_TYPE_OPERATION_EQUALIZE);
   g_type_class_ref (GIMP_TYPE_OPERATION_GROW);
+  g_type_class_ref (GIMP_TYPE_OPERATION_HISTOGRAM_SINK);
   g_type_class_ref (GIMP_TYPE_OPERATION_SET_ALPHA);
   g_type_class_ref (GIMP_TYPE_OPERATION_SHAPEBURST);
   g_type_class_ref (GIMP_TYPE_OPERATION_SHRINK);
diff --git a/app/gegl/gimpoperationhistogramsink.c b/app/gegl/gimpoperationhistogramsink.c
new file mode 100644
index 0000000..7e06fd5
--- /dev/null
+++ b/app/gegl/gimpoperationhistogramsink.c
@@ -0,0 +1,159 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationhistogramsink.c
+ * Copyright (C) 2012 Ãyvind KolÃs
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+
+#include "gimp-gegl-types.h"
+
+#include "gimpoperationhistogramsink.h"
+
+
+enum
+{
+  PROP_0,
+  PROP_INPUT,
+  PROP_AUX
+};
+
+static void     gimp_operation_histogram_sink_get_property (GObject             *gobject,
+                                                            guint                prop_id,
+                                                            GValue              *value,
+                                                            GParamSpec          *pspec);
+static void     gimp_operation_histogram_sink_set_property (GObject             *gobject,
+                                                            guint                prop_id,
+                                                            const GValue        *value,
+                                                            GParamSpec          *pspec);
+static gboolean gimp_operation_histogram_sink_process      (GeglOperation       *operation,
+                                                            GeglOperationContext     *context,
+                                                            const gchar         *output_prop,
+                                                            const GeglRectangle *result,
+                                                            gint                 level);
+static void     gimp_operation_histogram_sink_attach       (GeglOperation       *operation);
+
+static GeglRectangle gimp_operation_histogram_sink_get_required_for_output (GeglOperation        *self,
+                                                                            const gchar         *input_pad,
+                                                                            const GeglRectangle *roi);
+
+G_DEFINE_TYPE (GimpOperationHistogramSink, gimp_operation_histogram_sink,
+               GEGL_TYPE_OPERATION_SINK)
+
+
+static void
+gimp_operation_histogram_sink_class_init (GimpOperationHistogramSinkClass *klass)
+{
+  GObjectClass       *object_class    = G_OBJECT_CLASS (klass);
+  GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
+
+  object_class->set_property = gimp_operation_histogram_sink_set_property;
+  object_class->get_property = gimp_operation_histogram_sink_get_property;
+
+  operation_class->attach                  = gimp_operation_histogram_sink_attach;
+  operation_class->get_required_for_output = gimp_operation_histogram_sink_get_required_for_output;
+  operation_class->process                 = gimp_operation_histogram_sink_process;
+
+  g_object_class_install_property (object_class, PROP_AUX,
+                                   g_param_spec_object ("aux",
+                                                        "Aux",
+                                                        "Auxiliary image buffer input pad.",
+                                                        GEGL_TYPE_BUFFER,
+                                                        G_PARAM_READWRITE |
+                                                        GEGL_PARAM_PAD_INPUT));
+}
+
+static void
+gimp_operation_histogram_sink_init (GimpOperationHistogramSink *self)
+{
+}
+
+static void
+gimp_operation_histogram_sink_get_property (GObject    *object,
+                                            guint       prop_id,
+                                            GValue     *value,
+                                            GParamSpec *pspec)
+{
+}
+
+static void
+gimp_operation_histogram_sink_set_property (GObject      *object,
+                                            guint         prop_id,
+                                            const GValue *value,
+                                            GParamSpec   *pspec)
+{
+}
+
+static void
+gimp_operation_histogram_sink_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,
+                                                           "aux"));
+}
+
+static GeglRectangle
+gimp_operation_histogram_sink_get_required_for_output (GeglOperation       *self,
+                                                       const gchar         *input_pad,
+                                                       const GeglRectangle *roi)
+{
+  /* dunno what to do here, make a wild guess */
+  return *roi;
+}
+
+static gboolean
+gimp_operation_histogram_sink_process (GeglOperation        *operation,
+                                       GeglOperationContext *context,
+                                       const gchar          *output_prop,
+                                       const GeglRectangle  *result,
+                                       gint                  level)
+{
+  GeglBuffer *input;
+  GeglBuffer *aux;
+
+  if (strcmp (output_prop, "output"))
+    {
+      g_warning ("requested processing of %s pad on a sink", output_prop);
+      return FALSE;
+    }
+
+  input = gegl_operation_context_get_source (context, "input");
+  aux   = gegl_operation_context_get_source (context, "aux");
+
+  if (input)
+    {
+      if (aux)
+        {
+          /* do hist with mask */
+        }
+      else
+        {
+          /* without */
+        }
+
+      return TRUE;
+    }
+
+  g_warning ("received NULL input");
+
+  return FALSE;
+}
diff --git a/app/gegl/gimpoperationhistogramsink.h b/app/gegl/gimpoperationhistogramsink.h
new file mode 100644
index 0000000..c48043d
--- /dev/null
+++ b/app/gegl/gimpoperationhistogramsink.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationhistogramsink.h
+ * Copyright (C) 2012 Ãyvind KolÃs
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_HISTOGRAM_SINK_H__
+#define __GIMP_OPERATION_HISTOGRAM_SINK_H__
+
+
+#include <gegl-plugin.h>
+#include <operation/gegl-operation-sink.h>
+
+
+#define GIMP_TYPE_OPERATION_HISTOGRAM_SINK            (gimp_operation_histogram_sink_get_type ())
+#define GIMP_OPERATION_HISTOGRAM_SINK(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_HISTOGRAM_SINK, GimpOperationHistogramSink))
+#define GIMP_OPERATION_HISTOGRAM_SINK_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_HISTOGRAM_SINK, GimpOperationHistogramSinkClass))
+#define GEGL_IS_OPERATION_HISTOGRAM_SINK(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_HISTOGRAM_SINK))
+#define GEGL_IS_OPERATION_HISTOGRAM_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_HISTOGRAM_SINK))
+#define GIMP_OPERATION_HISTOGRAM_SINK_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_HISTOGRAM_SINK, GimpOperationHistogramSinkClass))
+
+
+typedef struct _GimpOperationHistogramSinkClass GimpOperationHistogramSinkClass;
+
+struct _GimpOperationHistogramSink
+{
+  GeglOperation  parent_instance;
+};
+
+struct _GimpOperationHistogramSinkClass
+{
+  GeglOperationSinkClass  parent_class;
+};
+
+
+GType   gimp_operation_histogram_sink_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_HISTOGRAM_SINK_C__ */