From 638da2ed2c38973851346158e98438ce97f5db00 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@hajimehoshi.com>
Date: Sun, 24 Nov 2013 03:30:12 +0900
Subject: [PATCH] Have EbitenWindow have a NSOpenGLContext

---
 ui/cocoa/ebiten_controller.c | 10 ++++++++++
 ui/cocoa/ebiten_window.c     | 17 ++++++++++++++---
 ui/cocoa/ebiten_window.h     |  4 +++-
 ui/cocoa/mainloop.c          | 16 +++++++++-------
 4 files changed, 36 insertions(+), 11 deletions(-)

diff --git a/ui/cocoa/ebiten_controller.c b/ui/cocoa/ebiten_controller.c
index 68b74c387..b852bd20b 100644
--- a/ui/cocoa/ebiten_controller.c
+++ b/ui/cocoa/ebiten_controller.c
@@ -24,6 +24,11 @@
 - (void)applicationDidFinishLaunching:(NSNotification*)aNotification {
   (void)aNotification;
   [self initMenu];
+
+  [[NSNotificationCenter defaultCenter] addObserver:self 
+                                           selector:@selector(windowClosing:) 
+                                               name:NSWindowWillCloseNotification 
+                                             object:nil];
 }
 
 - (BOOL)applicationShouldTerminateAfterLastWindowClosed:
@@ -32,4 +37,9 @@
   return YES;
 }
 
+- (void)windowClosing:(NSNotification*)aNotification {
+  (void)aNotification;
+  [NSApp terminate:nil];
+}
+
 @end
diff --git a/ui/cocoa/ebiten_window.c b/ui/cocoa/ebiten_window.c
index ceb3fb95f..e982c703a 100644
--- a/ui/cocoa/ebiten_window.c
+++ b/ui/cocoa/ebiten_window.c
@@ -6,9 +6,15 @@
 
 #import "ebiten_content_view.h"
 
-@implementation EbitenWindow
+@implementation EbitenWindow {
+@private
+  NSOpenGLContext* glContext_;
+}
+
+- (id)initWithSize:(NSSize)size
+         glContext:(NSOpenGLContext*)glContext {
+  self->glContext_ = glContext;
 
-- (id)initWithSize:(NSSize)size {
   NSUInteger style = (NSTitledWindowMask | NSClosableWindowMask |
                       NSMiniaturizableWindowMask);
   NSRect windowRect =
@@ -39,6 +45,10 @@
   return self;
 }
 
+- (NSOpenGLContext*)glContext {
+  return self->glContext_;
+}
+
 - (BOOL)windowShouldClose:(id)sender {
   if ([sender isDocumentEdited]) {
     // TODO: add the application's name
@@ -63,7 +73,8 @@
   (void)alert;
   (void)contextInfo;
   if (returnCode == NSAlertDefaultReturn) {
-    [NSApp terminate:nil];
+    [self->glContext_ release];
+    [self close];
   }
 }
 
diff --git a/ui/cocoa/ebiten_window.h b/ui/cocoa/ebiten_window.h
index 9e736e883..c4e6baf8f 100644
--- a/ui/cocoa/ebiten_window.h
+++ b/ui/cocoa/ebiten_window.h
@@ -7,7 +7,9 @@
 
 @interface EbitenWindow : NSWindow<NSWindowDelegate>
 
-- (id)initWithSize:(NSSize)size;
+- (id)initWithSize:(NSSize)size
+         glContext:(NSOpenGLContext*)glContext;
+- (NSOpenGLContext*)glContext;
 
 @end
 
diff --git a/ui/cocoa/mainloop.c b/ui/cocoa/mainloop.c
index 6cd7dfba6..120c4ed68 100644
--- a/ui/cocoa/mainloop.c
+++ b/ui/cocoa/mainloop.c
@@ -6,8 +6,6 @@
 #import "ebiten_controller.h"
 #import "ebiten_window.h"
 
-static NSOpenGLContext* glContext_;
-
 void StartApplication() {
   EbitenController* controller = [[EbitenController alloc] init];
   NSApplication* app = [NSApplication sharedApplication];
@@ -34,13 +32,18 @@ void* CreateGLContext() {
 }
 
 void* CreateWindow(size_t width, size_t height, const char* title) {
+  NSOpenGLContext* glContext = CreateGLContext();
+  [glContext makeCurrentContext];
+
   NSSize size = NSMakeSize(width, height);
   EbitenWindow* window = [[EbitenWindow alloc]
-                            initWithSize:size];
+                            initWithSize:size
+                               glContext:glContext];
   [window setTitle: [[NSString alloc] initWithUTF8String:title]];
   [window makeKeyAndOrderFront:nil];
-  glContext_ = CreateGLContext();
-  [glContext_ makeCurrentContext];
+
+  [glContext setView:[window contentView]];
+
   return window;
 }
 
@@ -58,10 +61,9 @@ void PollEvents(void) {
 }
 
 void BeginDrawing(void* window) {
-  [glContext_ setView:[(EbitenWindow*)window contentView]];
   glClear(GL_COLOR_BUFFER_BIT);
 }
 
 void EndDrawing(void* window) {
-  [glContext_ flushBuffer];
+  [[(EbitenWindow*)window glContext] flushBuffer];
 }