From 173d9fb38b029122e85610a69334ddb44107bd78 Mon Sep 17 00:00:00 2001
From: Franklin Wei <frankhwei536@gmail.com>
Date: Sun, 6 Nov 2016 14:08:46 -0500
Subject: boost selectively

Change-Id: Ic11542cef53716869c5348c18a2846308b4e867b
---
 apps/plugins/xworld/sys.c | 46 ++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 40 insertions(+), 6 deletions(-)

(limited to 'apps/plugins')

diff --git a/apps/plugins/xworld/sys.c b/apps/plugins/xworld/sys.c
index ea3dacd..53f6b78 100644
--- a/apps/plugins/xworld/sys.c
+++ b/apps/plugins/xworld/sys.c
@@ -231,7 +231,6 @@ static void do_video_settings(struct System* sys)
             }
             break;
         case 5:
-            rb->lcd_clear_display();
             sys_save_settings(sys);
             return;
         }
@@ -296,6 +295,38 @@ static int mainmenu_cb(int action, const struct menu_item_ex *this_item)
     return action;
 }
 
+static bool is_boosted = false;
+
+void sys_boost(struct System *sys)
+{
+    (void) sys;
+#ifdef HAVE_ADJUSTABLE_CPU_FREQ
+    if(!is_boosted)
+    {
+        rb->cpu_boost(true);
+        is_boosted = true;
+    }
+#endif
+}
+
+void sys_unboost(struct System *sys)
+{
+    (void) sys;
+#ifdef HAVE_ADJUSTABLE_CPU_FREQ
+    if(is_boosted)
+    {
+        rb->cpu_boost(false);
+        is_boosted = false;
+    }
+#endif
+}
+
+static void boost_if_needed(struct System *sys)
+{
+    if(sys->e->vm._fastMode || sys->settings.scaling_quality == 2)
+        sys_boost(sys);
+}
+
 static AudioCallback audio_callback = NULL;
 static void get_more(const void** start, size_t* size);
 static void* audio_param;
@@ -377,16 +408,16 @@ void sys_menu(struct System* sys)
             break;
         }
     }
-    rb->lcd_clear_display();
+
+    /* boost CPU if necessary */
+    boost_if_needed(sys);
+
     sys_startAudio(sys, audio_callback, audio_param);
 }
 
 void sys_init(struct System* sys, const char* title)
 {
     (void) title;
-#ifdef HAVE_ADJUSTABLE_CPU_FREQ
-    rb->cpu_boost(true);
-#endif
     backlight_ignore_timeout();
     rb_atexit(exit_handler);
     save_sys = sys;
@@ -621,6 +652,7 @@ void sys_copyRect(struct System* sys, uint16_t x, uint16_t y, uint16_t w, uint16
 static void do_pause_menu(struct System* sys)
 {
     sys_stopAudio(sys);
+    sys_unboost(sys);
     int sel = 0;
     MENUITEM_STRINGLIST(menu, "XWorld Menu", NULL,
                         "Resume Game",         /* 0 */
@@ -685,7 +717,9 @@ static void do_pause_menu(struct System* sys)
             break;
         }
     }
-    rb->lcd_clear_display();
+
+    boost_if_needed(sys);
+
     sys_startAudio(sys, audio_callback, audio_param);
 }
 
-- 
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