X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Ftools.c;h=b563b9318c16a897fd2700442b0e1c5bfa034285;hb=5eabbc4d089dcf4de6ddcc78159efd6a9ecef978;hp=4080f2d2e2621b0c1efbad149a389ab9be829450;hpb=d50a07318c72c9c03fde89ba36422706e20aff12;p=rocksndiamonds.git

diff --git a/src/tools.c b/src/tools.c
index 4080f2d2..b563b931 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -528,6 +528,22 @@ static void PrintFrameTimeDebugging()
 }
 #endif
 
+static int unifiedRedrawMask(int mask)
+{
+  if (mask & REDRAW_ALL)
+    return REDRAW_ALL;
+
+  if (mask & REDRAW_FIELD && mask & REDRAW_DOORS)
+    return REDRAW_ALL;
+
+  return mask;
+}
+
+static boolean equalRedrawMasks(int mask_1, int mask_2)
+{
+  return unifiedRedrawMask(mask_1) == unifiedRedrawMask(mask_2);
+}
+
 void BackToFront()
 {
   static int last_redraw_mask = REDRAW_NONE;
@@ -625,9 +641,10 @@ void BackToFront_WithFrameDelay(unsigned int frame_delay_value)
   SetVideoFrameDelay(frame_delay_value_old);
 }
 
+static int fade_type_skip = FADE_TYPE_NONE;
+
 static void FadeExt(int fade_mask, int fade_mode, int fade_type)
 {
-  static int fade_type_skip = FADE_TYPE_NONE;
   void (*draw_border_function)(void) = NULL;
   int x, y, width, height;
   int fade_delay, post_delay;
@@ -719,7 +736,8 @@ static void SetScreenStates_BeforeFadingIn()
   global.anim_status = global.anim_status_next;
 
   // store backbuffer with all animations that will be started after fading in
-  PrepareFadeBitmap(DRAW_TO_FADE_TARGET);
+  if (fade_type_skip != FADE_MODE_SKIP_FADE_IN)
+    PrepareFadeBitmap(DRAW_TO_FADE_TARGET);
 
   // set screen mode for animations back to fading
   global.anim_status = GAME_MODE_PSEUDO_FADING;
@@ -731,17 +749,10 @@ static void SetScreenStates_AfterFadingIn()
   gfx.fade_border_source_status = global.border_status;
 
   global.anim_status = global.anim_status_next;
-
-  // force update of global animation status in case of rapid screen changes
-  redraw_mask = REDRAW_ALL;
-  BackToFront();
 }
 
 static void SetScreenStates_BeforeFadingOut()
 {
-  // required if "fade_mask != redraw_mask" (fading only affects fade area)
-  BackToFront();
-
   // store new target screen (to use correct masked border for fading)
   gfx.fade_border_target_status = game_status;
 
@@ -749,7 +760,8 @@ static void SetScreenStates_BeforeFadingOut()
   global.anim_status = GAME_MODE_PSEUDO_FADING;
 
   // store backbuffer with all animations that will be stopped for fading out
-  PrepareFadeBitmap(DRAW_TO_FADE_SOURCE);
+  if (fade_type_skip != FADE_MODE_SKIP_FADE_OUT)
+    PrepareFadeBitmap(DRAW_TO_FADE_SOURCE);
 }
 
 static void SetScreenStates_AfterFadingOut()
@@ -776,10 +788,18 @@ void FadeIn(int fade_mask)
   FADE_SYSIZE = FULL_SYSIZE;
 
   SetScreenStates_AfterFadingIn();
+
+  // force update of global animation status in case of rapid screen changes
+  redraw_mask = REDRAW_ALL;
+  BackToFront();
 }
 
 void FadeOut(int fade_mask)
 {
+  // update screen if areas covered by "fade_mask" and "redraw_mask" differ
+  if (!equalRedrawMasks(fade_mask, redraw_mask))
+    BackToFront();
+
   SetScreenStates_BeforeFadingOut();
 
 #if 0