From 9cc5f3e93526865ea2c128510d8bce1ce513d2ff Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Wed, 6 Aug 2014 00:28:02 -0700
Subject: [PATCH] The OpenGL context returned by the UIKit backend is now an
 actual OpenGL context instead of the OpenGL view we created. This allows you
 to use the returned context in functions like CVOpenGLESTextureCacheCreate()

---
 src/video/uikit/SDL_uikitopengles.m | 50 +++++++++++++++++------------
 1 file changed, 29 insertions(+), 21 deletions(-)

diff --git a/src/video/uikit/SDL_uikitopengles.m b/src/video/uikit/SDL_uikitopengles.m
index 42303e3cb..8d71ee818 100644
--- a/src/video/uikit/SDL_uikitopengles.m
+++ b/src/video/uikit/SDL_uikitopengles.m
@@ -51,14 +51,7 @@ UIKit_GL_GetProcAddress(_THIS, const char *proc)
 */
 int UIKit_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
 {
-    if (context) {
-        SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
-        [data->view setCurrentContext];
-    }
-    else {
-        [EAGLContext setCurrentContext: nil];
-    }
-
+    [EAGLContext setCurrentContext: context];
     return 0;
 }
 
@@ -146,8 +139,9 @@ SDL_GLContext UIKit_GL_CreateContext(_THIS, SDL_Window * window)
         uiwindow.rootViewController = view->viewcontroller;
     }
 
-    if (UIKit_GL_MakeCurrent(_this, window, view) < 0) {
-        UIKit_GL_DeleteContext(_this, view);
+    EAGLContext *context = view.context;
+    if (UIKit_GL_MakeCurrent(_this, window, context) < 0) {
+        UIKit_GL_DeleteContext(_this, context);
         return NULL;
     }
 
@@ -157,23 +151,37 @@ SDL_GLContext UIKit_GL_CreateContext(_THIS, SDL_Window * window)
         SDL_SetKeyboardFocus(window);
     }
 
-    return view;
+    return context;
 }
 
 void UIKit_GL_DeleteContext(_THIS, SDL_GLContext context)
 {
-    /* the delegate has retained the view, this will release him */
-    SDL_uikitopenglview *view = (SDL_uikitopenglview *)context;
-    if (view->viewcontroller) {
-        UIWindow *uiwindow = (UIWindow *)view.superview;
-        if (uiwindow.rootViewController == view->viewcontroller) {
-            uiwindow.rootViewController = nil;
+    SDL_Window *window;
+
+    /* Find the view associated with this context */
+    for (window = _this->windows; window; window = window->next) {
+        SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
+        SDL_uikitopenglview *view = data->view;
+        if (view.context == context) {
+            /* the delegate has retained the view, this will release him */
+            if (view->viewcontroller) {
+                UIWindow *uiwindow = (UIWindow *)view.superview;
+                if (uiwindow.rootViewController == view->viewcontroller) {
+                    uiwindow.rootViewController = nil;
+                }
+                [view->viewcontroller setView:nil];
+                [view->viewcontroller release];
+            }
+            [view removeFromSuperview];
+
+            /* FIXME: This doesn't actually call view dealloc - what is holding a reference to it? */
+            [view release];
+            return;
         }
-        [view->viewcontroller setView:nil];
-        [view->viewcontroller release];
     }
-    [view removeFromSuperview];
-    [view release];
+
+    /* View not found... delete the context anyway? */
+    [(EAGLContext *)context release];
 }
 
 #endif /* SDL_VIDEO_DRIVER_UIKIT */