3 files changed, 34 insertions, 19 deletions

diff --git a/src/api/ios/mod.rs b/src/api/ios/mod.rs
index 0163f45..ef34955 100644
--- a/src/api/ios/mod.rs
+++ b/src/api/ios/mod.rs
@@ -64,6 +64,7 @@
 
 use std::collections::VecDeque;
 use std::ptr;
+use std::io;
 use std::mem;
 use std::ffi::CString;
 
@@ -71,7 +72,8 @@ use libc;
 use objc::runtime::{Class, BOOL, YES, NO };
 
 use native_monitor::NativeMonitorId;
-use { Api, PixelFormat, CreationError, BuilderAttribs, GlContext, CursorState, MouseCursor, Event };
+use { Api, PixelFormat, CreationError, GlContext, CursorState, MouseCursor, Event };
+use { PixelFormatRequirements, GlAttributes, WindowAttributes, ContextError };
 use CreationError::OsError;
 
 mod delegate;
@@ -102,6 +104,7 @@ use self::ffi::{
 
 static mut jmpbuf: [libc::c_int;27] = [0;27];
 
+#[derive(Clone)]
 pub struct MonitorID;
 
 pub struct Window {
@@ -172,7 +175,7 @@ impl MonitorID {
 
 impl Window {
 
-    pub fn new(builder: BuilderAttribs) -> Result<Window, CreationError> {
+    pub fn new(builder: &WindowAttributes, _: &PixelFormatRequirements, _: &GlAttributes<&Window>) -> Result<Window, CreationError> {
         unsafe {
             if setjmp(mem::transmute(&mut jmpbuf)) != 0 {
                 let app: id = msg_send![Class::get("UIApplication").unwrap(), sharedApplication];
@@ -200,7 +203,7 @@ impl Window {
         Err(CreationError::OsError(format!("Couldn't create UIApplication")))
     }
 
-    unsafe fn init_context(&mut self, builder: BuilderAttribs) {
+    unsafe fn init_context(&mut self, builder: &WindowAttributes) {
         let draw_props: id = msg_send![Class::get("NSDictionary").unwrap(), alloc];
             let draw_props: id = msg_send![draw_props,
                     initWithObjects:
@@ -215,11 +218,11 @@ impl Window {
                         ].as_ptr()
                     count: 2
             ];
-        self.make_current();
+        let _ = self.make_current();
 
         let state = &mut *self.delegate_state;
 
-        if builder.window.multitouch {
+        if builder.multitouch {
             let _: () = msg_send![state.view, setMultipleTouchEnabled:YES];
         }
 
@@ -265,10 +268,6 @@ impl Window {
         }
     }
 
-    pub fn is_closed(&self) -> bool {
-        false
-    }
-
     pub fn set_title(&self, _: &str) {
     }
 
@@ -345,8 +344,13 @@ impl Window {
 }
 
 impl GlContext for Window {
-    unsafe fn make_current(&self) {
-        let _:BOOL = msg_send![Class::get("EAGLContext").unwrap(), setCurrentContext: self.eagl_context];
+    unsafe fn make_current(&self) -> Result<(), ContextError> {
+        let res: BOOL = msg_send![Class::get("EAGLContext").unwrap(), setCurrentContext: self.eagl_context];
+        if res == YES {
+            Ok(())
+        } else {
+            Err(ContextError::IoError(io::Error::new(io::ErrorKind::Other, "EAGLContext::setCurrentContext unsuccessful")))
+        }
     }
 
     fn is_current(&self) -> bool {
@@ -362,8 +366,15 @@ impl GlContext for Window {
         }
     }
 
-    fn swap_buffers(&self) {
-        unsafe { let _:BOOL = msg_send![self.eagl_context, presentRenderbuffer: gles::RENDERBUFFER]; }
+    fn swap_buffers(&self) -> Result<(), ContextError> {
+        unsafe {
+            let res: BOOL = msg_send![self.eagl_context, presentRenderbuffer: gles::RENDERBUFFER];
+            if res == YES {
+                Ok(())
+            } else {
+                Err(ContextError::IoError(io::Error::new(io::ErrorKind::Other, "EAGLContext.presentRenderbuffer unsuccessful")))
+            }
+        }
     }
 
     fn get_api(&self) -> Api {
diff --git a/src/lib.rs b/src/lib.rs
index a75a47a..0d0e6ef 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -362,7 +362,7 @@ pub struct PixelFormat {
     pub multisampling: Option<u16>,
     pub srgb: bool,
 }
-    
+
 /// VERY UNSTABLE! Describes how the backend should choose a pixel format.
 #[derive(Clone, Debug)]
 #[allow(missing_docs)]
@@ -526,7 +526,8 @@ pub struct WindowAttributes {
     /// The default is `true`.
     pub decorations: bool,
 
-    /// ??? TODO: document me
+    /// [iOS only] Enable multitouch, see [UIView#multipleTouchEnabled]
+    /// (https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIView_Class/#//apple_ref/occ/instp/UIView/multipleTouchEnabled)
     pub multitouch: bool,
 }
 
diff --git a/src/platform/ios/mod.rs b/src/platform/ios/mod.rs
index 7cbdd84..95fa7e1 100644
--- a/src/platform/ios/mod.rs
+++ b/src/platform/ios/mod.rs
@@ -1,9 +1,11 @@
 #![cfg(target_os = "ios")]
 use libc::c_void;
 
-use BuilderAttribs;
+use GlAttributes;
 use CreationError;
 use PixelFormat;
+use PixelFormatRequirements;
+use ContextError;
 
 pub use api::ios::*;
 
@@ -11,16 +13,17 @@ pub struct HeadlessContext(i32);
 
 impl HeadlessContext {
     /// See the docs in the crate root file.
-    pub fn new(_builder: BuilderAttribs) -> Result<HeadlessContext, CreationError> {
+    pub fn new(_: (u32, u32), _: &PixelFormatRequirements, _: &GlAttributes<&HeadlessContext>)
+            -> Result<HeadlessContext, CreationError> {
         unimplemented!()
     }
 
     /// See the docs in the crate root file.
-    pub unsafe fn make_current(&self) {
+    pub unsafe fn make_current(&self) -> Result<(), ContextError> {
         unimplemented!()
     }
 
-    pub fn swap_buffers(&self) {
+    pub fn swap_buffers(&self) -> Result<(), ContextError> {
         unimplemented!()
     }