[gimp] app: add gimp_gegl_create_transform_node()

[Ell <ell src gnome org>]

commit 3895dc07a95195a7ed5fcc30aa2ddc4f2deafd01
Author: Ell <ell_se yahoo com>
Date:   Wed May 29 04:37:29 2019 -0400

    app: add gimp_gegl_create_transform_node()
    
    ... which takes a GimpMatrix3, and returns a corresponding
    gegl:transform node.

 app/gegl/gimp-gegl-nodes.c | 16 ++++++++++++++++
 app/gegl/gimp-gegl-nodes.h |  2 ++
 2 files changed, 18 insertions(+)
---
diff --git a/app/gegl/gimp-gegl-nodes.c b/app/gegl/gimp-gegl-nodes.c
index 197109d8be..0dde5199c6 100644
--- a/app/gegl/gimp-gegl-nodes.c
+++ b/app/gegl/gimp-gegl-nodes.c
@@ -126,6 +126,22 @@ gimp_gegl_create_apply_opacity_node (GeglBuffer *mask,
   return node;
 }
 
+GeglNode *
+gimp_gegl_create_transform_node (const GimpMatrix3 *matrix)
+{
+  GeglNode *node;
+
+  g_return_val_if_fail (matrix != NULL, NULL);
+
+  node = gegl_node_new_child (NULL,
+                              "operation", "gegl:transform",
+                              NULL);
+
+  gimp_gegl_node_set_matrix (node, matrix);
+
+  return node;
+}
+
 GeglNode *
 gimp_gegl_add_buffer_source (GeglNode   *parent,
                              GeglBuffer *buffer,
diff --git a/app/gegl/gimp-gegl-nodes.h b/app/gegl/gimp-gegl-nodes.h
index 55c033e32f..67a191a253 100644
--- a/app/gegl/gimp-gegl-nodes.h
+++ b/app/gegl/gimp-gegl-nodes.h
@@ -29,6 +29,8 @@ GeglNode * gimp_gegl_create_apply_opacity_node (GeglBuffer            *mask,
                                                 gint                   mask_offset_x,
                                                 gint                   mask_offset_y,
                                                 gdouble                opacity);
+GeglNode * gimp_gegl_create_transform_node     (const GimpMatrix3     *matrix);
+
 GeglNode * gimp_gegl_add_buffer_source         (GeglNode              *parent,
                                                 GeglBuffer            *buffer,
                                                 gint                   offset_x,