From 5fa534b942cdb96908cfa6faa0a84dcf10008def Mon Sep 17 00:00:00 2001
From: Kjetil Orbekk <kjetil.orbekk@gmail.com>
Date: Sun, 7 Aug 2016 11:28:35 -0400
Subject: Wrap GeglBuffer in struct.

---
 src/main.rs | 49 +++++++++++++++++++++++++++++++++++++------------
 1 file changed, 37 insertions(+), 12 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index d6d685c..1073a08 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -8,6 +8,32 @@ use glib::translate::*;
 use glib::Value;
 use gobject_ffi::G_TYPE_POINTER;
 
+pub struct GeglBuffer(*mut libc::c_void);
+
+impl GeglBuffer {
+    pub fn new() -> GeglBuffer {
+        GeglBuffer(unsafe {
+            gegl_buffer_new(ptr::null_mut(), ptr::null_mut()) })
+    }
+
+    pub fn get_value(&self) -> Value {
+        unsafe {
+            let mut ret = Value::uninitialized();
+            gobject_ffi::g_value_init(ret.to_glib_none_mut().0, G_TYPE_POINTER);
+            gobject_ffi::g_value_set_pointer(ret.to_glib_none_mut().0,
+                                            self.0);
+            ret
+        }
+    }
+}
+
+impl Drop for GeglBuffer {
+    fn drop(&mut self) {
+        println!("Dropping geglbuffer");
+        unsafe { g_object_unref(self.0); }
+        println!("Dropped");
+    }
+}
 
 #[link(name="gegl-0.3")]
 extern {
@@ -50,7 +76,7 @@ fn main() {
         //         as *const libc::c_void);
         // gegl_node_link(src, sink);
         // let mut buffer : *mut libc::c_void = ptr::null_mut();
-        let mut buffer = gegl_buffer_new(ptr::null_mut(), ptr::null_mut());
+        let buffer = gegl_buffer_new(ptr::null_mut(), ptr::null_mut());
         let sink = gegl_node_create_child(graph,
                                           CString::new("gegl:buffer-sink")
                                           .unwrap().as_ptr());
@@ -58,18 +84,17 @@ fn main() {
         //     sink,
         //     CString::new("buffer").unwrap().as_ptr(),
         //     Value::from(buffer).to_glib_none().0);
-        let mut ret = Value::uninitialized();
-        gobject_ffi::g_value_init(ret.to_glib_none_mut().0, G_TYPE_POINTER);
-        gobject_ffi::g_value_set_pointer(ret.to_glib_none_mut().0,
-                                         buffer);
-
-        gegl_node_set_property(
-            sink,
-            CString::new("buffer").unwrap().as_ptr(),
-            ret.to_glib_none_mut().0 as *mut libc::c_void);
+        {
+            let buffer = GeglBuffer::new();
+            println!("buffer: {:?}", buffer.get_value());
+            gegl_node_set_property(
+                sink,
+                CString::new("buffer").unwrap().as_ptr(),
+                buffer.get_value().to_glib_none().0 as *mut libc::c_void);
 
-        gegl_node_link(src, sink);
-        gegl_node_process(sink);
+            gegl_node_link(src, sink);
+            gegl_node_process(sink);
+        }
         g_object_unref(graph);
         gegl_exit();
     }
-- 
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