Enable backlight brightness in simulator

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24042 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 8 insertions, 7 deletions

diff --git a/uisimulator/common/backlight-sim.c b/uisimulator/common/backlight-sim.c
index e8bce8ff7a..74a715a035 100644
--- a/uisimulator/common/backlight-sim.c
+++ b/uisimulator/common/backlight-sim.c
@@ -30,6 +30,8 @@ extern void lcd_awake(void);
 /* in uisimulator/sdl/lcd-bitmap.c and lcd-charcell.c */
 extern void sim_backlight(int value);
 
+static int old_val = 100;
+
 bool _backlight_init(void)
 {
     return true;
@@ -37,7 +39,7 @@ bool _backlight_init(void)
 
 void _backlight_on(void)
 {
-    sim_backlight(100);
+    sim_backlight(old_val);
 #if defined(HAVE_LCD_ENABLE)
     lcd_enable(true);
 #elif defined(HAVE_LCD_SLEEP)
@@ -56,7 +58,10 @@ void _backlight_off(void)
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS
 void _backlight_set_brightness(int val)
 {
-    (void)val;
+    int normalized = ((val - MIN_BRIGHTNESS_SETTING + 1) * 100) / MAX_BRIGHTNESS_SETTING;
+    sim_backlight(normalized);
+
+    old_val = normalized;
 }
 #endif /* HAVE_BACKLIGHT_BRIGHTNESS */
 #ifdef HAVE_BUTTON_LIGHT
diff --git a/uisimulator/sdl/lcd-bitmap.c b/uisimulator/sdl/lcd-bitmap.c
index 3c73b6fc5d..0bd90196e4 100644
--- a/uisimulator/sdl/lcd-bitmap.c
+++ b/uisimulator/sdl/lcd-bitmap.c
@@ -149,11 +149,7 @@ void sim_backlight(int value)
 #endif
     }
 #else /* LCD_DEPTH > 8 */
-    if (value > 0) {
-        SDL_SetAlpha(lcd_surface, 0, SDL_ALPHA_OPAQUE); /* full on */
-    } else {
-        SDL_SetAlpha(lcd_surface, SDL_SRCALPHA, BACKLIGHT_OFF_ALPHA);
-    }
+    SDL_SetAlpha(lcd_surface, SDL_SRCALPHA, (value * 255) / 100);
 #endif /* LCD_DEPTH */
 
     sdl_gui_update(lcd_surface, 0, 0, SIM_LCD_WIDTH, SIM_LCD_HEIGHT,