From 2d2a68c4d00ed77483ae17607f0613b4a8188d0e Mon Sep 17 00:00:00 2001
From: Kjetil Orbekk <kjetil.orbekk@gmail.com>
Date: Sat, 6 Aug 2016 21:31:20 -0400
Subject: Write to a GEGL buffer.

---
 Cargo.toml  |  2 ++
 src/main.rs | 40 +++++++++++++++++++++++++++++++---------
 2 files changed, 33 insertions(+), 9 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 87e126f..8c31968 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,3 +6,5 @@ authors = ["Kjetil Orbekk <kjetil.orbekk@gmail.com>"]
 [dependencies]
 libc = "*"
 glib = "*"
+gobject-sys = "*"
+glib-sys = "*"
diff --git a/src/main.rs b/src/main.rs
index 4f26cd2..d6d685c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,9 +1,13 @@
 extern crate libc;
 extern crate glib;
+extern crate gobject_sys as gobject_ffi;
+extern crate glib_sys as glib_ffi;
 use std::ffi::CString;
 use std::ptr;
 use glib::translate::*;
 use glib::Value;
+use gobject_ffi::G_TYPE_POINTER;
+
 
 #[link(name="gegl-0.3")]
 extern {
@@ -20,6 +24,8 @@ extern {
     fn gegl_node_process(node: *mut libc::c_void);
     fn g_object_unref(node: *mut libc::c_void);
     fn gegl_exit();
+    fn gegl_buffer_new(extent: *mut libc::c_void, format: *mut libc::c_void)
+        -> *mut libc::c_void;
 }
 
 fn main() {
@@ -29,24 +35,40 @@ fn main() {
         let graph = gegl_node_new();
         let src = gegl_node_create_child(
             graph, CString::new("gegl:load").unwrap().as_ptr());
-        println!("{:?}", src);
-        println!("Hello");
         gegl_node_set_property(
             src,
             CString::new("path").unwrap().as_ptr(),
             // ptr::null_mut()
             Value::from("/tmp/test.jpg").to_glib_none().0
                 as *const libc::c_void);
-        let sink = gegl_node_create_child(
-            graph, CString::new("gegl:save").unwrap().as_ptr());
+        // let sink = gegl_node_create_child(
+        //     graph, CString::new("gegl:save").unwrap().as_ptr());
+        // gegl_node_set_property(
+        //     sink,
+        //     CString::new("path").unwrap().as_ptr(),
+        //     Value::from("/tmp/test-output.jpg").to_glib_none().0
+        //         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 sink = gegl_node_create_child(graph,
+                                          CString::new("gegl:buffer-sink")
+                                          .unwrap().as_ptr());
+        // gegl_node_set_property(
+        //     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("path").unwrap().as_ptr(),
-            Value::from("/tmp/test-output.jpg").to_glib_none().0
-                as *const libc::c_void);
-        gegl_node_link(src, sink);
-        println!("Hello");
+            CString::new("buffer").unwrap().as_ptr(),
+            ret.to_glib_none_mut().0 as *mut libc::c_void);
 
+        gegl_node_link(src, sink);
         gegl_node_process(sink);
         g_object_unref(graph);
         gegl_exit();
-- 
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