Fixes bug #2040, prepare SDL_GL_CONTEXT_EGL for deprecation on v2.1

SDL_GL_CONTEXT_EGL = 1 is now internally treated as profile_mask = SDL_GL_CONTEXT_PROFILE_ES

src/render/opengles/SDL_render_gles.c

@@ -280,7 +280,7 @@ GLES_CreateRenderer(SDL_Window * window, Uint32 flags)
     GLint value;
     Uint32 windowFlags;
 
-    SDL_GL_SetAttribute(SDL_GL_CONTEXT_EGL, 1);
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 1);
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
 

src/render/opengles2/SDL_render_gles2.c

@@ -1628,7 +1628,7 @@ GLES2_CreateRenderer(SDL_Window *window, Uint32 flags)
     Uint32 windowFlags;
     GLint window_framebuffer;
 
-    SDL_GL_SetAttribute(SDL_GL_CONTEXT_EGL, 1);
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
 

src/video/SDL_video.c

@@ -477,26 +477,21 @@ SDL_VideoInit(const char *driver_name)
     _this->gl_config.multisamplesamples = 0;
     _this->gl_config.retained_backing = 1;
     _this->gl_config.accelerated = -1;  /* accelerated or not, both are fine */
+    _this->gl_config.profile_mask = 0;
 #if SDL_VIDEO_OPENGL
     _this->gl_config.major_version = 2;
     _this->gl_config.minor_version = 1;
-    _this->gl_config.use_egl = 0;
 #elif SDL_VIDEO_OPENGL_ES
     _this->gl_config.major_version = 1;
     _this->gl_config.minor_version = 1;
-#if SDL_VIDEO_OPENGL_EGL    
-    _this->gl_config.use_egl = 1;
-#endif    
+    _this->gl_config.profile_mask = SDL_GL_CONTEXT_PROFILE_ES;
 #elif SDL_VIDEO_OPENGL_ES2
     _this->gl_config.major_version = 2;
     _this->gl_config.minor_version = 0;
-#if SDL_VIDEO_OPENGL_EGL    
-    _this->gl_config.use_egl = 1;
-#endif
-    
+    _this->gl_config.profile_mask = SDL_GL_CONTEXT_PROFILE_ES;   
 #endif
     _this->gl_config.flags = 0;
-    _this->gl_config.profile_mask = 0;
+    
     _this->gl_config.share_with_current_context = 0;
 
     _this->current_glwin_tls = SDL_TLSCreate();
@@ -2516,7 +2511,12 @@ SDL_GL_SetAttribute(SDL_GLattr attr, int value)
         _this->gl_config.minor_version = value;
         break;
     case SDL_GL_CONTEXT_EGL:
-        _this->gl_config.use_egl = value;
+        /* FIXME: SDL_GL_CONTEXT_EGL to be deprecated in SDL 2.1 */
+        if (value != 0) {
+            SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
+        } else {
+            SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, 0);
+        };
         break;
     case SDL_GL_CONTEXT_FLAGS:
         if( value & ~(SDL_GL_CONTEXT_DEBUG_FLAG |
@@ -2686,8 +2686,14 @@ SDL_GL_GetAttribute(SDL_GLattr attr, int *value)
             return 0;
         }
     case SDL_GL_CONTEXT_EGL:
+        /* FIXME: SDL_GL_CONTEXT_EGL to be deprecated in SDL 2.1 */
         {
-            *value = _this->gl_config.use_egl;
+            if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
+                *value = 1;
+            }
+            else {
+                *value = 0;
+            }
             return 0;
         }
     case SDL_GL_CONTEXT_FLAGS:

src/video/x11/SDL_x11opengl.c

@@ -210,36 +210,31 @@ X11_GL_LoadLibrary(_THIS, const char *path)
     /* Initialize extensions */
     X11_GL_InitExtensions(_this);
     
-    /* If SDL_GL_CONTEXT_EGL has been changed to 1, and there's 
-     * no GLX_EXT_create_context_es2_profile extension switch over to X11_GLES functions  */
-    if (_this->gl_config.use_egl == 1) {
-        if (_this->gl_data->HAS_GLX_EXT_create_context_es2_profile) {
-            /* We cheat a little bit here by using GLX instead of EGL 
-             * to improve our chances of getting hardware acceleration */
-            _this->gl_config.use_egl = 0;
-            _this->gl_config.profile_mask = SDL_GL_CONTEXT_PROFILE_ES;
-        } else {
+    /* If we need a GL ES context and there's no  
+     * GLX_EXT_create_context_es2_profile extension, switch over to X11_GLES functions  
+     */
+    if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES && 
+        ! _this->gl_data->HAS_GLX_EXT_create_context_es2_profile ) {
 #if SDL_VIDEO_OPENGL_EGL
-            X11_GL_UnloadLibrary(_this);
-            /* Better avoid conflicts! */
-            if (_this->gl_config.dll_handle != NULL ) {
-                GL_UnloadObject(_this->gl_config.dll_handle);
-                _this->gl_config.dll_handle = NULL;
-            }
-            _this->GL_LoadLibrary = X11_GLES_LoadLibrary;
-            _this->GL_GetProcAddress = X11_GLES_GetProcAddress;
-            _this->GL_UnloadLibrary = X11_GLES_UnloadLibrary;
-            _this->GL_CreateContext = X11_GLES_CreateContext;
-            _this->GL_MakeCurrent = X11_GLES_MakeCurrent;
-            _this->GL_SetSwapInterval = X11_GLES_SetSwapInterval;
-            _this->GL_GetSwapInterval = X11_GLES_GetSwapInterval;
-            _this->GL_SwapWindow = X11_GLES_SwapWindow;
-            _this->GL_DeleteContext = X11_GLES_DeleteContext;
-            return X11_GLES_LoadLibrary(_this, NULL);
+        X11_GL_UnloadLibrary(_this);
+        /* Better avoid conflicts! */
+        if (_this->gl_config.dll_handle != NULL ) {
+            GL_UnloadObject(_this->gl_config.dll_handle);
+            _this->gl_config.dll_handle = NULL;
+        }
+        _this->GL_LoadLibrary = X11_GLES_LoadLibrary;
+        _this->GL_GetProcAddress = X11_GLES_GetProcAddress;
+        _this->GL_UnloadLibrary = X11_GLES_UnloadLibrary;
+        _this->GL_CreateContext = X11_GLES_CreateContext;
+        _this->GL_MakeCurrent = X11_GLES_MakeCurrent;
+        _this->GL_SetSwapInterval = X11_GLES_SetSwapInterval;
+        _this->GL_GetSwapInterval = X11_GLES_GetSwapInterval;
+        _this->GL_SwapWindow = X11_GLES_SwapWindow;
+        _this->GL_DeleteContext = X11_GLES_DeleteContext;
+        return X11_GLES_LoadLibrary(_this, NULL);
 #else
-            return SDL_SetError("SDL not configured with EGL support");
+        return SDL_SetError("SDL not configured with EGL support");
 #endif
-        }
     }
 
     return 0;

src/video/x11/SDL_x11opengles.c

@@ -33,8 +33,8 @@ X11_GLES_LoadLibrary(_THIS, const char *path) {
         
     SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
 
-    /* If SDL_GL_CONTEXT_EGL has been changed to 0, switch over to X11_GL functions  */
-    if (_this->gl_config.use_egl == 0) {
+    /* If the profile requested is not GL ES, switch over to X11_GL functions  */
+    if (_this->gl_config.profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
         #if SDL_VIDEO_OPENGL_GLX
         _this->GL_LoadLibrary = X11_GL_LoadLibrary;
         _this->GL_GetProcAddress = X11_GL_GetProcAddress;

src/video/x11/SDL_x11window.c

@@ -366,10 +366,11 @@ X11_CreateWindow(_THIS, SDL_Window * window)
 
 #if SDL_VIDEO_OPENGL_GLX || SDL_VIDEO_OPENGL_EGL
     if (window->flags & SDL_WINDOW_OPENGL) {
-        XVisualInfo *vinfo;
+        XVisualInfo *vinfo = NULL;
 
 #if SDL_VIDEO_OPENGL_EGL
-        if (_this->gl_config.use_egl == 1) {
+        if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES && 
+            ( !_this->gl_data || ! _this->gl_data->HAS_GLX_EXT_create_context_es2_profile )) {
             vinfo = X11_GLES_GetVisual(_this, display, screen);
         } else
 #endif
@@ -378,6 +379,7 @@ X11_CreateWindow(_THIS, SDL_Window * window)
             vinfo = X11_GL_GetVisual(_this, display, screen);
 #endif
         }
+
         if (!vinfo) {
             return -1;
         }
@@ -551,7 +553,9 @@ X11_CreateWindow(_THIS, SDL_Window * window)
     windowdata = (SDL_WindowData *) window->driverdata;
 
 #if SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2
-    if ((window->flags & SDL_WINDOW_OPENGL) && (_this->gl_config.use_egl == 1)) {
+    if ((window->flags & SDL_WINDOW_OPENGL) && 
+        _this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES && 
+        (!_this->gl_data || ! _this->gl_data->HAS_GLX_EXT_create_context_es2_profile) ) {
         if (!_this->egl_data) {
             XDestroyWindow(display, w);
             return -1;