evas: Fix a rare issue with GL and map and mask

The things you learn to love...

The situation was:
- An object is mapped (naviframe in an animation)
- One of its children has a mask
- The window is rotated by 90 or 270 degrees (landscape)

The mask glsl code to invert the x,y coordinate depends on the
screen rotation and this somehow was wrong.

Tested on Tizen and in elm_test "Masking", made with @jiin.moon.

@fix

src/bin/elementary/test_evas_mask.c

@@ -95,6 +95,18 @@ _toggle_map(void *data, const Efl_Event *ev EINA_UNUSED)
      }
 }
 
+static void
+_rotate_win(void *data, const Efl_Event *ev EINA_UNUSED)
+{
+   //Efl_Orient orient;
+   Eo *win = data;
+
+   // FIXME: This is not implemented???
+   //orient = efl_orientation_get(win);
+   //efl_orientation_set(win, (orient + 90) % 360);
+   elm_win_rotation_set(win, (elm_win_rotation_get(win) + 90) % 360);
+}
+
 void
 test_evas_mask(void *data EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info EINA_UNUSED)
 {
@@ -170,6 +182,12 @@ test_evas_mask(void *data EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event
            efl_pack(box2, efl_added),
            efl_gfx_visible_set(efl_added, 1));
 
+   efl_add(ELM_BUTTON_CLASS, win,
+           efl_text_set(efl_added, "Rotate Window"),
+           efl_event_callback_add(efl_added, EFL_UI_EVENT_CLICKED, _rotate_win, win),
+           efl_pack(box2, efl_added),
+           efl_gfx_visible_set(efl_added, 1));
+
    efl_gfx_size_set(win, 500, 600);
    efl_gfx_visible_set(win, 1);
 }

src/modules/evas/engines/gl_common/evas_gl_context.c

@@ -3202,7 +3202,7 @@ shader_array_flush(Evas_Engine_GL_Context *gc)
              glUseProgram(prog->prog);
              if (prog->reset)
                {
-                  glUniform1i(prog->uniform.rotation_id, gc->rot / 90);
+                  glUniform1i(prog->uniform.rotation_id, fbo ? 0 : gc->rot / 90);
                   glUniformMatrix4fv(prog->uniform.mvp, 1, GL_FALSE, gc->shared->proj);
                   prog->reset = EINA_FALSE;
                }