Implement lists sharing

1 files changed, 11 insertions, 4 deletions

diff --git a/src/win32/init.rs b/src/win32/init.rs
index 1f5be09..29b45cb 100644
--- a/src/win32/init.rs
+++ b/src/win32/init.rs
@@ -15,7 +15,8 @@ local_data_key!(WINDOW: (ffi::HWND, Sender<Event>))
 pub fn new_window(builder_dimensions: Option<(uint, uint)>, builder_title: String,
                   builder_monitor: Option<super::MonitorID>,
                   builder_gl_version: Option<(uint, uint)>, builder_debug: bool,
-                  builder_vsync: bool, builder_hidden: bool) -> Result<Window, CreationError>
+                  builder_vsync: bool, builder_hidden: bool,
+                  builder_sharelists: Option<ffi::HGLRC>) -> Result<Window, CreationError>
 {
     use std::mem;
     use std::os;
@@ -305,10 +306,16 @@ pub fn new_window(builder_dimensions: Option<(uint, uint)>, builder_title: Strin
 
             let ctxt = unsafe {
                 if extra_functions.CreateContextAttribsARB.is_loaded() {
-                    extra_functions.CreateContextAttribsARB(hdc, ptr::null(),
-                        attributes.as_slice().as_ptr())
+                    let share = if let Some(c) = builder_sharelists { c } else { ptr::null() };
+                    extra_functions.CreateContextAttribsARB(hdc, share,
+                                                            attributes.as_slice().as_ptr())
+
                 } else {
-                    ffi::wgl::CreateContext(hdc)
+                    let ctxt = ffi::wgl::CreateContext(hdc);
+                    if let Some(c) = builder_sharelists {
+                        ffi::wgl::ShareLists(c, ctxt);
+                    };
+                    ctxt
                 }
             };