From 2bfb3c3e82407459c0a733fb89e14cc77ba26e68 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Fri, 12 Sep 2014 15:09:33 -0700
Subject: [PATCH] Fixed using uninitialized display data in iMX6 initialization

---
 src/video/mx6/SDL_mx6opengles.c | 26 +++++++++++---------------
 src/video/mx6/SDL_mx6video.c    | 20 ++++++++++----------
 src/video/mx6/SDL_mx6video.h    |  1 -
 3 files changed, 21 insertions(+), 26 deletions(-)

diff --git a/src/video/mx6/SDL_mx6opengles.c b/src/video/mx6/SDL_mx6opengles.c
index 375a14a58..1e513751d 100644
--- a/src/video/mx6/SDL_mx6opengles.c
+++ b/src/video/mx6/SDL_mx6opengles.c
@@ -48,12 +48,12 @@ if (!egl_viv_data->NAME) \
 /* EGL implementation of SDL OpenGL support */
 
 int
-MX6_GLES_LoadLibrary(_THIS, const char *egl_path) {
+MX6_GLES_LoadLibrary(_THIS, const char *egl_path)
+{
     /* The definitions of egl_dll_handle and dll_handle were interchanged for some reason.
        Just left them as is for compatibility */
     void *dll_handle = NULL, *egl_dll_handle = NULL;
     char *path = NULL;
-    SDL_DisplayData *displaydata;
 
     if (_this->egl_data) {
         return SDL_SetError("OpenGL ES context already created");
@@ -75,7 +75,7 @@ MX6_GLES_LoadLibrary(_THIS, const char *egl_path) {
     }
 
     if (egl_dll_handle == NULL) {
-        if(_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
+        if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
             if (_this->gl_config.major_version > 1) {
                 path = DEFAULT_OGL_ES2;
                 egl_dll_handle = SDL_LoadObject(path);
@@ -84,11 +84,11 @@ MX6_GLES_LoadLibrary(_THIS, const char *egl_path) {
                 path = DEFAULT_OGL_ES;
                 egl_dll_handle = SDL_LoadObject(path);
             }
-        }      
+        }
         else {
             path = DEFAULT_OGL;
             egl_dll_handle = SDL_LoadObject(path);
-        }     
+        }
     }
     _this->egl_data->egl_dll_handle = egl_dll_handle;
 
@@ -98,8 +98,8 @@ MX6_GLES_LoadLibrary(_THIS, const char *egl_path) {
 
     if (egl_path != NULL) {
         dll_handle = SDL_LoadObject(egl_path);
-    }   
-    
+    }
+
     if (SDL_LoadFunction(dll_handle, "eglChooseConfig") == NULL) {
         if (dll_handle != NULL) {
             SDL_UnloadObject(dll_handle);
@@ -148,20 +148,16 @@ MX6_GLES_LoadLibrary(_THIS, const char *egl_path) {
     LOAD_VIV_FUNC(fbGetPixmapGeometry);
     LOAD_VIV_FUNC(fbGetPixmapInfo);
     LOAD_VIV_FUNC(fbDestroyPixmap);
-   
-    displaydata = SDL_GetDisplayDriverData(0);
 
-    _this->egl_data->egl_display = _this->egl_data->eglGetDisplay(displaydata->native_display);
+    _this->egl_data->egl_display = _this->egl_data->eglGetDisplay(egl_viv_data->fbGetDisplayByIndex(0));
     if (!_this->egl_data->egl_display) {
         return SDL_SetError("Could not get EGL display");
     }
-    
+
     if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
         return SDL_SetError("Could not initialize EGL");
     }
 
-    displaydata->egl_display = _this->egl_data->egl_display;
-
     _this->gl_config.driver_loaded = 1;
 
     if (path) {
@@ -169,7 +165,7 @@ MX6_GLES_LoadLibrary(_THIS, const char *egl_path) {
     } else {
         *_this->gl_config.driver_path = '\0';
     }
-    
+
     return 0;
 }
 
@@ -190,7 +186,7 @@ MX6_GLES_UnloadLibrary(_THIS)
             SDL_UnloadObject(_this->egl_data->egl_dll_handle);
             _this->egl_data->egl_dll_handle = NULL;
         }
-        
+
         SDL_free(_this->egl_data);
         _this->egl_data = NULL;
 
diff --git a/src/video/mx6/SDL_mx6video.c b/src/video/mx6/SDL_mx6video.c
index 2f9c04f2a..d449ef636 100644
--- a/src/video/mx6/SDL_mx6video.c
+++ b/src/video/mx6/SDL_mx6video.c
@@ -163,7 +163,7 @@ MX6_VideoInit(_THIS)
     SDL_VideoDisplay display;
     SDL_DisplayMode current_mode;
     SDL_DisplayData *data;
-    
+
     data = (SDL_DisplayData *) SDL_calloc(1, sizeof(SDL_DisplayData));
     if (data == NULL) {
         return SDL_OutOfMemory();
@@ -181,9 +181,9 @@ MX6_VideoInit(_THIS)
     }
     MX6_UpdateDisplay(_this);
 
-#ifdef SDL_INPUT_LINUXEV    
+#ifdef SDL_INPUT_LINUXEV
     SDL_EVDEV_Init();
-#endif    
+#endif
 
     return 1;
 }
@@ -191,9 +191,9 @@ MX6_VideoInit(_THIS)
 void
 MX6_VideoQuit(_THIS)
 {
-#ifdef SDL_INPUT_LINUXEV    
+#ifdef SDL_INPUT_LINUXEV
     SDL_EVDEV_Quit();
-#endif    
+#endif
 }
 
 void
@@ -214,9 +214,9 @@ MX6_CreateWindow(_THIS, SDL_Window * window)
 {
     SDL_DisplayData *displaydata;
     SDL_WindowData *wdata;
-    
+
     displaydata = SDL_GetDisplayDriverData(0);
-    
+
     /* Allocate window internal data */
     wdata = (SDL_WindowData *) SDL_calloc(1, sizeof(SDL_WindowData));
     if (wdata == NULL) {
@@ -226,12 +226,12 @@ MX6_CreateWindow(_THIS, SDL_Window * window)
     /* Setup driver data for this window */
     window->driverdata = wdata;
     window->flags |= SDL_WINDOW_OPENGL;
-    
+
     if (!_this->egl_data) {
         return -1;
     }
 
-    wdata->native_window = egl_viv_data->fbCreateWindow(displaydata->native_display, window->x, window->y, window->w, window->h);    
+    wdata->native_window = egl_viv_data->fbCreateWindow(displaydata->native_display, window->x, window->y, window->w, window->h);
     if (!wdata->native_window) {
         return SDL_SetError("MX6: Can't create native window");
     }
@@ -249,7 +249,7 @@ void
 MX6_DestroyWindow(_THIS, SDL_Window * window)
 {
     SDL_WindowData *wdata;
-    
+
     wdata = window->driverdata;
     if (wdata) {
         SDL_EGL_DestroySurface(_this, wdata->egl_surface);
diff --git a/src/video/mx6/SDL_mx6video.h b/src/video/mx6/SDL_mx6video.h
index 7827337f8..9dcae5a33 100644
--- a/src/video/mx6/SDL_mx6video.h
+++ b/src/video/mx6/SDL_mx6video.h
@@ -34,7 +34,6 @@ typedef struct SDL_VideoData
 typedef struct SDL_DisplayData
 {
     EGLNativeDisplayType native_display;
-    EGLDisplay egl_display;
 } SDL_DisplayData;
 
 typedef struct SDL_WindowData