[gimp] app: add gimp:fill-source operation



commit 6b0337e384e396adf74ac979cf2864958f7841ee
Author: Ell <ell_se yahoo com>
Date:   Wed Mar 27 15:10:53 2019 -0400

    app: add gimp:fill-source operation
    
    Add a new gimp:fill-source operation, which can act as a source
    node for fill operations, instead of a fill buffer.  The op takes
    a GimpFillOptions object, a drawable, and a pattern offset, and
    uses gimp_fill_options_create_buffer() to produce its output.
    
    This allows performing the entire fill operation in chunks as a
    graph, instead of allocating a full-size fill buffer, which can
    can occupy a lot of space for pattern fills.

 app/operations/Makefile.am               |   2 +
 app/operations/gimp-operations.c         |   2 +
 app/operations/gimpoperationfillsource.c | 248 +++++++++++++++++++++++++++++++
 app/operations/gimpoperationfillsource.h |  55 +++++++
 4 files changed, 307 insertions(+)
---
diff --git a/app/operations/Makefile.am b/app/operations/Makefile.am
index 4e49a52dab..e46c944674 100644
--- a/app/operations/Makefile.am
+++ b/app/operations/Makefile.am
@@ -52,6 +52,8 @@ libappoperations_a_sources = \
        gimpoperationcomposecrop.h              \
        gimpoperationequalize.c                 \
        gimpoperationequalize.h                 \
+       gimpoperationfillsource.c               \
+       gimpoperationfillsource.h               \
        gimpoperationflood.c                    \
        gimpoperationflood.h                    \
        gimpoperationgradient.c                 \
diff --git a/app/operations/gimp-operations.c b/app/operations/gimp-operations.c
index f21a02a8ba..dd9390bf14 100644
--- a/app/operations/gimp-operations.c
+++ b/app/operations/gimp-operations.c
@@ -36,6 +36,7 @@
 #include "gimpoperationcagetransform.h"
 #include "gimpoperationcomposecrop.h"
 #include "gimpoperationequalize.h"
+#include "gimpoperationfillsource.h"
 #include "gimpoperationflood.h"
 #include "gimpoperationgradient.h"
 #include "gimpoperationgrow.h"
@@ -129,6 +130,7 @@ gimp_operations_init (Gimp *gimp)
   g_type_class_ref (GIMP_TYPE_OPERATION_CAGE_TRANSFORM);
   g_type_class_ref (GIMP_TYPE_OPERATION_COMPOSE_CROP);
   g_type_class_ref (GIMP_TYPE_OPERATION_EQUALIZE);
+  g_type_class_ref (GIMP_TYPE_OPERATION_FILL_SOURCE);
   g_type_class_ref (GIMP_TYPE_OPERATION_FLOOD);
   g_type_class_ref (GIMP_TYPE_OPERATION_GRADIENT);
   g_type_class_ref (GIMP_TYPE_OPERATION_GROW);
diff --git a/app/operations/gimpoperationfillsource.c b/app/operations/gimpoperationfillsource.c
new file mode 100644
index 0000000000..1e285202ab
--- /dev/null
+++ b/app/operations/gimpoperationfillsource.c
@@ -0,0 +1,248 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationfillsource.c
+ * Copyright (C) 2019 Ell
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <cairo.h>
+#include <gegl-plugin.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "operations-types.h"
+
+#include "core/gimpdrawable.h"
+#include "core/gimpfilloptions.h"
+
+#include "gimpoperationfillsource.h"
+
+
+enum
+{
+  PROP_0,
+  PROP_OPTIONS,
+  PROP_DRAWABLE,
+  PROP_PATTERN_OFFSET_X,
+  PROP_PATTERN_OFFSET_Y,
+};
+
+
+static void            gimp_operation_fill_source_dispose          (GObject              *object);
+static void            gimp_operation_fill_source_get_property     (GObject              *object,
+                                                                    guint                 property_id,
+                                                                    GValue               *value,
+                                                                    GParamSpec           *pspec);
+static void            gimp_operation_fill_source_set_property     (GObject              *object,
+                                                                    guint                 property_id,
+                                                                    const GValue         *value,
+                                                                    GParamSpec           *pspec);
+
+static GeglRectangle   gimp_operation_fill_source_get_bounding_box (GeglOperation        *operation);
+static void            gimp_operation_fill_source_prepare          (GeglOperation        *operation);
+static gboolean        gimp_operation_fill_source_process          (GeglOperation        *operation,
+                                                                    GeglOperationContext *context,
+                                                                    const gchar          *output_pad,
+                                                                    const GeglRectangle  *result,
+                                                                    gint                  level);
+
+
+G_DEFINE_TYPE (GimpOperationFillSource, gimp_operation_fill_source,
+               GEGL_TYPE_OPERATION_SOURCE)
+
+#define parent_class gimp_operation_fill_source_parent_class
+
+
+static void
+gimp_operation_fill_source_class_init (GimpOperationFillSourceClass *klass)
+{
+  GObjectClass       *object_class    = G_OBJECT_CLASS (klass);
+  GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
+
+  object_class->dispose             = gimp_operation_fill_source_dispose;
+  object_class->set_property        = gimp_operation_fill_source_set_property;
+  object_class->get_property        = gimp_operation_fill_source_get_property;
+
+  operation_class->get_bounding_box = gimp_operation_fill_source_get_bounding_box;
+  operation_class->prepare          = gimp_operation_fill_source_prepare;
+  operation_class->process          = gimp_operation_fill_source_process;
+
+  operation_class->threaded         = FALSE;
+  operation_class->cache_policy     = GEGL_CACHE_POLICY_NEVER;
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:fill-source",
+                                 "categories",  "gimp",
+                                 "description", "GIMP Fill Source operation",
+                                 NULL);
+
+  g_object_class_install_property (object_class, PROP_OPTIONS,
+                                   g_param_spec_object ("options",
+                                                        "Options",
+                                                        "Fill options",
+                                                        GIMP_TYPE_FILL_OPTIONS,
+                                                        G_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_DRAWABLE,
+                                   g_param_spec_object ("drawable",
+                                                        "Drawable",
+                                                        "Fill drawable",
+                                                        GIMP_TYPE_DRAWABLE,
+                                                        G_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_PATTERN_OFFSET_X,
+                                   g_param_spec_int  ("pattern-offset-x",
+                                                      "Pattern X-offset",
+                                                      "Pattern X-offset",
+                                                      G_MININT, G_MAXINT, 0,
+                                                      G_PARAM_READWRITE |
+                                                      G_PARAM_CONSTRUCT));
+
+  g_object_class_install_property (object_class, PROP_PATTERN_OFFSET_Y,
+                                   g_param_spec_int  ("pattern-offset-y",
+                                                      "Pattern Y-offset",
+                                                      "Pattern Y-offset",
+                                                      G_MININT, G_MAXINT, 0,
+                                                      G_PARAM_READWRITE |
+                                                      G_PARAM_CONSTRUCT));
+}
+
+static void
+gimp_operation_fill_source_init (GimpOperationFillSource *self)
+{
+}
+
+static void
+gimp_operation_fill_source_dispose (GObject *object)
+{
+  GimpOperationFillSource *fill_source = GIMP_OPERATION_FILL_SOURCE (object);
+
+  g_clear_object (&fill_source->options);
+  g_clear_object (&fill_source->drawable);
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gimp_operation_fill_source_get_property (GObject    *object,
+                                         guint       property_id,
+                                         GValue     *value,
+                                         GParamSpec *pspec)
+{
+  GimpOperationFillSource *fill_source = GIMP_OPERATION_FILL_SOURCE (object);
+
+  switch (property_id)
+    {
+    case PROP_OPTIONS:
+      g_value_set_object (value, fill_source->options);
+      break;
+
+    case PROP_DRAWABLE:
+      g_value_set_object (value, fill_source->drawable);
+      break;
+
+    case PROP_PATTERN_OFFSET_X:
+      g_value_set_int (value, fill_source->pattern_offset_x);
+      break;
+
+    case PROP_PATTERN_OFFSET_Y:
+      g_value_set_int (value, fill_source->pattern_offset_y);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_operation_fill_source_set_property (GObject      *object,
+                                         guint         property_id,
+                                         const GValue *value,
+                                         GParamSpec   *pspec)
+{
+  GimpOperationFillSource *fill_source = GIMP_OPERATION_FILL_SOURCE (object);
+
+  switch (property_id)
+    {
+    case PROP_OPTIONS:
+      g_set_object (&fill_source->options, g_value_get_object (value));
+      break;
+
+    case PROP_DRAWABLE:
+      g_set_object (&fill_source->drawable, g_value_get_object (value));
+      break;
+
+    case PROP_PATTERN_OFFSET_X:
+      fill_source->pattern_offset_x = g_value_get_int (value);
+      break;
+
+    case PROP_PATTERN_OFFSET_Y:
+      fill_source->pattern_offset_y = g_value_get_int (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static GeglRectangle
+gimp_operation_fill_source_get_bounding_box (GeglOperation *operation)
+{
+  return gegl_rectangle_infinite_plane ();
+}
+
+static void
+gimp_operation_fill_source_prepare (GeglOperation *operation)
+{
+  GimpOperationFillSource *fill_source = GIMP_OPERATION_FILL_SOURCE (operation);
+  const Babl              *format      = NULL;
+
+  if (fill_source->options && fill_source->drawable)
+    {
+      format = gimp_fill_options_get_format (fill_source->options,
+                                             fill_source->drawable);
+    }
+
+  gegl_operation_set_format (operation, "output", format);
+}
+
+static gboolean
+gimp_operation_fill_source_process (GeglOperation        *operation,
+                                    GeglOperationContext *context,
+                                    const gchar          *output_pad,
+                                    const GeglRectangle  *result,
+                                    gint                  level)
+{
+  GimpOperationFillSource *fill_source = GIMP_OPERATION_FILL_SOURCE (operation);
+
+  if (fill_source->options && fill_source->drawable)
+    {
+      GeglBuffer *buffer;
+
+      buffer = gimp_fill_options_create_buffer (fill_source->options,
+                                                fill_source->drawable,
+                                                result,
+                                                fill_source->pattern_offset_x,
+                                                fill_source->pattern_offset_y);
+
+      gegl_operation_context_take_object (context, "output", G_OBJECT (buffer));
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/gimpoperationfillsource.h b/app/operations/gimpoperationfillsource.h
new file mode 100644
index 0000000000..6a9f468c93
--- /dev/null
+++ b/app/operations/gimpoperationfillsource.h
@@ -0,0 +1,55 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationfillsource.h
+ * Copyright (C) 2019 Ell
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_FILL_SOURCE_H__
+#define __GIMP_OPERATION_FILL_SOURCE_H__
+
+
+#define GIMP_TYPE_OPERATION_FILL_SOURCE            (gimp_operation_fill_source_get_type ())
+#define GIMP_OPERATION_FILL_SOURCE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), 
GIMP_TYPE_OPERATION_FILL_SOURCE, GimpOperationFillSource))
+#define GIMP_OPERATION_FILL_SOURCE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  
GIMP_TYPE_OPERATION_FILL_SOURCE, GimpOperationFillSourceClass))
+#define GIMP_IS_OPERATION_FILL_SOURCE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), 
GIMP_TYPE_OPERATION_FILL_SOURCE))
+#define GIMP_IS_OPERATION_FILL_SOURCE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  
GIMP_TYPE_OPERATION_FILL_SOURCE))
+#define GIMP_OPERATION_FILL_SOURCE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  
GIMP_TYPE_OPERATION_FILL_SOURCE, GimpOperationFillSourceClass))
+
+
+typedef struct _GimpOperationFillSource      GimpOperationFillSource;
+typedef struct _GimpOperationFillSourceClass GimpOperationFillSourceClass;
+
+struct _GimpOperationFillSource
+{
+  GeglOperationSource  parent_instance;
+
+  GimpFillOptions     *options;
+  GimpDrawable        *drawable;
+  gint                 pattern_offset_x;
+  gint                 pattern_offset_y;
+};
+
+struct _GimpOperationFillSourceClass
+{
+  GeglOperationSourceClass  parent_class;
+};
+
+
+GType   gimp_operation_fill_source_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_FILL_SOURCE_H__ */


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