From c38110cac77253761afc8cc616f645dc1ec4d3b8 Mon Sep 17 00:00:00 2001
From: David Partouche <david@manateedev.com>
Date: Sat, 4 Oct 2014 15:49:39 +0200
Subject: Cocoa opens a window with OpenGL context inside

---
 src/lib.rs     |   5 +++
 src/osx/mod.rs | 106 ++++++++++++++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 99 insertions(+), 12 deletions(-)

(limited to 'src')

diff --git a/src/lib.rs b/src/lib.rs
index 3b1a586..e41d01e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -22,6 +22,11 @@
 #[phase(plugin)] extern crate gl_generator;
 extern crate libc;
 
+#[cfg(target_os = "macos")]
+extern crate cocoa;
+#[cfg(target_os = "macos")]
+extern crate core_foundation;
+
 pub use events::*;
 
 use std::default::Default;
diff --git a/src/osx/mod.rs b/src/osx/mod.rs
index 6960cc1..99a8b2b 100644
--- a/src/osx/mod.rs
+++ b/src/osx/mod.rs
@@ -1,12 +1,17 @@
-//! Dummy implementation for OS/X to make gl-init-rs compile on this platform
-
 use {Event, WindowBuilder};
 
-pub struct Window;
+use cocoa::base::{id, NSUInteger, nil};
+use cocoa::appkit::*;
 
-pub struct MonitorID;
+use core_foundation::base::TCFType;
+use core_foundation::string::CFString;
+use core_foundation::bundle::{CFBundleGetBundleWithIdentifier, CFBundleGetFunctionPointerForName};
+
+pub struct Window {
+    context: id,
+}
 
-compile_warning!("The OS/X platform is not implemented yet")
+pub struct MonitorID;
 
 pub fn get_available_monitors() -> Vec<MonitorID> {
     unimplemented!()
@@ -18,7 +23,7 @@ pub fn get_primary_monitor() -> MonitorID {
 
 impl MonitorID {
     pub fn get_name(&self) -> Option<String> {
-        unimplemented!()
+       unimplemented!()
     }
 
     pub fn get_dimensions(&self) -> (uint, uint) {
@@ -28,11 +33,68 @@ impl MonitorID {
 
 impl Window {
     pub fn new(_builder: WindowBuilder) -> Result<Window, String> {
-        unimplemented!()
+        let context = unsafe {
+            // Create the NSApplication
+            let app = NSApp();
+            app.setActivationPolicy_(NSApplicationActivationPolicyRegular);
+
+            app.finishLaunching();
+
+            // Create the window
+            let scr_frame = NSRect::new(NSPoint::new(0., 0.), NSSize::new(800., 600.));
+
+            let window = NSWindow::alloc(nil).initWithContentRect_styleMask_backing_defer_(
+                scr_frame,
+                NSTitledWindowMask as NSUInteger | NSClosableWindowMask as NSUInteger | NSMiniaturizableWindowMask as NSUInteger,
+                NSBackingStoreBuffered,
+                false
+            );
+            let view = NSView::alloc(nil).init();
+            view.setWantsBestResolutionOpenGLSurface_(true);
+
+            let title = NSString::alloc(nil).init_str("Hello World!\0");
+            window.setTitle_(title);
+            window.setContentView(view);
+            window.center();
+
+            // Create the context
+            let attributes = [
+                NSOpenGLPFADoubleBuffer as uint,
+                NSOpenGLPFAClosestPolicy as uint,
+                NSOpenGLPFAColorSize as uint, 24,
+                NSOpenGLPFAAlphaSize as uint, 8,
+                NSOpenGLPFADepthSize as uint, 24,
+                NSOpenGLPFAStencilSize as uint, 8,
+                0
+            ];
+
+            let pixelformat = NSOpenGLPixelFormat::alloc(nil).initWithAttributes_(attributes);
+            if pixelformat == nil {
+                return Err(format!("Couldn't create the pixel format"));
+            }
+
+            let context = NSOpenGLContext::alloc(nil).initWithFormat_shareContext_(pixelformat, nil);
+            if context == nil {
+                return Err(format!("No valid OpenGL context can be created with that pixelformat"));
+            }
+
+            context.setView_(view);
+
+            app.activateIgnoringOtherApps_(true);
+            window.makeKeyAndOrderFront_(nil);
+            context
+        };
+
+        let window = Window {
+            context: context,
+        };
+
+        Ok(window)
     }
 
     pub fn is_closed(&self) -> bool {
-        unimplemented!()
+        // TODO: remove fake implementation
+        false
     }
 
     pub fn set_title(&self, _title: &str) {
@@ -64,18 +126,38 @@ impl Window {
     }
 
     pub fn wait_events(&self) -> Vec<Event> {
-        unimplemented!()
+        loop {
+            unsafe {
+                let event = NSApp().nextEventMatchingMask_untilDate_inMode_dequeue_(
+                    NSAnyEventMask as u64,
+                    nil,
+                    NSDefaultRunLoopMode,
+                    true);
+                if event == nil { break; }
+                NSApp().sendEvent_(event);
+            }
+        }
+        // TODO: Remove fake implementation
+        Vec::new()
     }
 
     pub unsafe fn make_current(&self) {
-        unimplemented!()
+        self.context.makeCurrentContext();
     }
 
     pub fn get_proc_address(&self, _addr: &str) -> *const () {
-        unimplemented!()
+        let symbol_name: CFString = from_str(_addr).unwrap();
+        let framework_name: CFString = from_str("com.apple.opengl").unwrap();
+        let framework = unsafe {
+            CFBundleGetBundleWithIdentifier(framework_name.as_concrete_TypeRef())
+        };
+        let symbol = unsafe {
+            CFBundleGetFunctionPointerForName(framework, symbol_name.as_concrete_TypeRef())
+        };
+        symbol as *const ()
     }
 
     pub fn swap_buffers(&self) {
-        unimplemented!()
+        unsafe { self.context.flushBuffer(); }
     }
 }
-- 
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