Move GEGL things to its own library.

1 files changed, 60 insertions, 0 deletions

diff --git a/src/gegl.rs b/src/gegl.rs
new file mode 100644
index 0000000..b03fca1
--- /dev/null
+++ b/src/gegl.rs
@@ -0,0 +1,60 @@
+extern crate libc;
+
+use gegl_ffi as ffi;
+use std::ptr;
+use std::ffi::CString;
+
+pub struct GeglContext {
+    _private: ()
+}
+
+unsafe fn unref<T>(object: *mut T) {
+    ffi::g_object_unref(object as *mut libc::c_void);
+}
+
+impl GeglContext {
+    pub fn new() -> GeglContext {
+        unsafe { ffi::gegl_init(&mut 0, ptr::null_mut()) }
+        GeglContext { _private: () }
+    }
+
+    pub fn new_node(&self) -> GeglNode {
+        GeglNode(unsafe { ffi::gegl_node_new() })
+    }
+}
+
+impl Drop for GeglContext {
+    fn drop(&mut self) {
+        unsafe { ffi::gegl_exit(); }
+    }
+}
+
+pub struct GeglNode(*mut ffi::CGeglNode);
+
+impl GeglNode {
+    pub fn create_child(self, operation: &str) -> GeglNode {
+        GeglNode(unsafe {
+            let operation0 = CString::new(operation).unwrap();
+            ffi::gegl_node_create_child(self.0, operation0.as_ptr())
+        })
+    }
+}
+
+impl Drop for GeglNode {
+    fn drop(&mut self) {
+        unsafe { unref(self.0); }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use gegl_ffi as ffi;
+
+    #[test]
+    fn can_create_nodes() {
+        let context = GeglContext::new();
+        let node = context.new_node();
+        let node2 = context.new_node();
+    }
+}