iOS/tvOS: create gl context as gles3

iOS 7+ supports gles3, which is backwards compatible with gles2. This
doesn't enable the glcore driver (which isn't working on ios yet), it
just changes the underlying context.

This fixes some of the rendering performance problems on mupen64plus_next.

gfx/drivers_context/cocoa_gl_ctx.m

@@ -473,16 +473,17 @@ static bool cocoa_gl_gfx_ctx_set_video_mode(void *data,
    cocoa_ctx_data_t *cocoa_ctx = (cocoa_ctx_data_t*)data;
 
    if (cocoa_ctx->flags & COCOA_CTX_FLAG_USE_HW_CTX)
-      g_hw_ctx      = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
-   g_ctx            = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
-   glk_view.context = g_ctx;
+      g_hw_ctx      = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES3];
+   g_ctx            = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES3];
 
 #ifdef OSX
    [g_ctx makeCurrentContext];
 #else
    [EAGLContext setCurrentContext:g_ctx];
 #endif
 
+   glk_view.context = g_ctx;
+
    /* TODO: Maybe iOS users should be able to 
     * show/hide the status bar here? */
    return true;

griffin/griffin_objc.m

@@ -30,7 +30,7 @@
 #if defined(HAVE_COCOATOUCH) || defined(HAVE_COCOA) || defined(HAVE_COCOA_METAL)
 
 #include "../ui/drivers/cocoa/cocoa_common.m"
-#if defined(HAVE_OPENGL) || defined(HAVE_OPENGL_ES)
+#if defined(HAVE_OPENGL) || defined(HAVE_OPENGLES)
 #include "../gfx/drivers_context/cocoa_gl_ctx.m"
 #endif
 #if defined(HAVE_VULKAN)

pkg/apple/RetroArch_iOS13.xcodeproj/project.pbxproj

@@ -2082,7 +2082,7 @@
 					"-DHAVE_ONLINE_UPDATER",
 					"-DHAVE_OPENGL",
 					"-DHAVE_OPENGLES",
-					"-DHAVE_OPENGLES2",
+					"-DHAVE_OPENGLES3",
 					"-DHAVE_OZONE",
 					"-DHAVE_PATCH",
 					"-DHAVE_RBMP",
@@ -2199,7 +2199,7 @@
 					"-DHAVE_ONLINE_UPDATER",
 					"-DHAVE_OPENGL",
 					"-DHAVE_OPENGLES",
-					"-DHAVE_OPENGLES2",
+					"-DHAVE_OPENGLES3",
 					"-DHAVE_OZONE",
 					"-DHAVE_PATCH",
 					"-DHAVE_RBMP",

retroarch.c

@@ -6525,7 +6525,7 @@ bool retroarch_main_init(int argc, char *argv[])
    {
       RARCH_ERR("%s: \"%s\"\n",
             msg_hash_to_str(MSG_FATAL_ERROR_RECEIVED_IN),
-            global->error_string);
+            global_get_ptr()->error_string);
       goto error;
    }
 
@@ -6835,7 +6835,7 @@ bool retroarch_main_init(int argc, char *argv[])
 
 error:
    command_event(CMD_EVENT_CORE_DEINIT, NULL);
-   runloop_st->flags            &= ~RUNLOOP_FLAG_IS_INITED;
+   runloop_state_get_ptr()->flags            &= ~RUNLOOP_FLAG_IS_INITED;
 
    return false;
 }