X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Ftools.c;h=b563b9318c16a897fd2700442b0e1c5bfa034285;hb=eb51a78900b95e3f7c9c3fbc9e4cf9360b374188;hp=76fa6c484a282c8a2170ac80b5a997b7d66d6e46;hpb=33cabd20cdb4e7aa84dfd30975f1364e7b776121;p=rocksndiamonds.git

diff --git a/src/tools.c b/src/tools.c
index 76fa6c48..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;
@@ -550,6 +566,10 @@ void BackToFront()
   if (redraw_mask & REDRAW_FPS)
     DrawFramesPerSecond();
 
+  // remove playfield redraw before potentially merging with doors redraw
+  if (DrawingDeactivated(REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE))
+    redraw_mask &= ~REDRAW_FIELD;
+
   // redraw complete window if both playfield and (some) doors need redraw
   if (redraw_mask & REDRAW_FIELD && redraw_mask & REDRAW_DOORS)
     redraw_mask = REDRAW_ALL;
@@ -570,14 +590,37 @@ void BackToFront()
   }
   else if (redraw_mask & REDRAW_DOORS)
   {
+    // merge door areas to prevent calling screen redraw more than once
+    int x1 = WIN_XSIZE;
+    int y1 = WIN_YSIZE;
+    int x2 = 0;
+    int y2 = 0;
+
     if (redraw_mask & REDRAW_DOOR_1)
-      BlitBitmap(backbuffer, window, DX, DY, DXSIZE, DYSIZE, DX, DY);
+    {
+      x1 = MIN(x1, DX);
+      y1 = MIN(y1, DY);
+      x2 = MAX(x2, DX + DXSIZE);
+      y2 = MAX(y2, DY + DYSIZE);
+    }
 
     if (redraw_mask & REDRAW_DOOR_2)
-      BlitBitmap(backbuffer, window, VX, VY, VXSIZE, VYSIZE, VX, VY);
+    {
+      x1 = MIN(x1, VX);
+      y1 = MIN(y1, VY);
+      x2 = MAX(x2, VX + VXSIZE);
+      y2 = MAX(y2, VY + VYSIZE);
+    }
 
     if (redraw_mask & REDRAW_DOOR_3)
-      BlitBitmap(backbuffer, window, EX, EY, EXSIZE, EYSIZE, EX, EY);
+    {
+      x1 = MIN(x1, EX);
+      y1 = MIN(y1, EY);
+      x2 = MAX(x2, EX + EXSIZE);
+      y2 = MAX(y2, EY + EYSIZE);
+    }
+
+    BlitBitmap(backbuffer, window, x1, y1, x2 - x1, y2 - y1, x1, y1);
   }
 
   redraw_mask = REDRAW_NONE;
@@ -598,9 +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;
@@ -692,7 +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;
@@ -704,10 +749,6 @@ 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()
@@ -719,7 +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()
@@ -746,10 +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