rnd-20070307-1-src
[rocksndiamonds.git] / src / libgame / sdl.c
index 732fc9be178044998461d4b429d32185dc4bd439..f3f57567777520ccf0b864a690706e8f5b02b93d 100644 (file)
@@ -1,7 +1,7 @@
 /***********************************************************
 * Artsoft Retro-Game Library                               *
 *----------------------------------------------------------*
-* (c) 1994-2002 Artsoft Entertainment                      *
+* (c) 1994-2006 Artsoft Entertainment                      *
 *               Holger Schemel                             *
 *               Detmolder Strasse 189                      *
 *               33604 Bielefeld                            *
@@ -35,12 +35,12 @@ static int fullscreen_yoffset;
 static int video_xoffset;
 static int video_yoffset;
 
-static void setFullscreenParameters()
+static void setFullscreenParameters(char *fullscreen_mode_string)
 {
   struct ScreenModeInfo *fullscreen_mode;
   int i;
 
-  fullscreen_mode = get_screen_mode_from_string(setup.fullscreen_mode);
+  fullscreen_mode = get_screen_mode_from_string(fullscreen_mode_string);
 
   if (fullscreen_mode == NULL)
     return;
@@ -63,6 +63,10 @@ static void setFullscreenParameters()
 
 static void SDLSetWindowIcon(char *basename)
 {
+  /* (setting the window icon on Mac OS X would replace the high-quality
+     dock icon with the currently smaller (and uglier) icon from file) */
+
+#if !defined(PLATFORM_MACOSX)
   char *filename = getCustomImageFilename(basename);
   SDL_Surface *surface;
 
@@ -85,10 +89,14 @@ static void SDLSetWindowIcon(char *basename)
                  SDL_MapRGB(surface->format, 0x00, 0x00, 0x00));
 
   SDL_WM_SetIcon(surface, NULL);
+#endif
 }
 
 void SDLInitVideoDisplay(void)
 {
+  if (!strEqual(setup.system.sdl_videodriver, ARG_DEFAULT))
+    putenv(getStringCat2("SDL_VIDEODRIVER=", setup.system.sdl_videodriver));
+
   putenv("SDL_VIDEO_CENTERED=1");
 
   /* initialize SDL video */
@@ -235,7 +243,7 @@ boolean SDLSetVideoMode(DrawBuffer **backbuffer, boolean fullscreen)
 
   if (fullscreen && !video.fullscreen_enabled && video.fullscreen_available)
   {
-    setFullscreenParameters();
+    setFullscreenParameters(setup.fullscreen_mode);
 
     video_xoffset = fullscreen_xoffset;
     video_yoffset = fullscreen_yoffset;
@@ -250,6 +258,7 @@ boolean SDLSetVideoMode(DrawBuffer **backbuffer, boolean fullscreen)
 
       /* do not try it again */
       video.fullscreen_available = FALSE;
+
       success = FALSE;
     }
     else
@@ -257,6 +266,8 @@ boolean SDLSetVideoMode(DrawBuffer **backbuffer, boolean fullscreen)
       (*backbuffer)->surface = new_surface;
 
       video.fullscreen_enabled = TRUE;
+      video.fullscreen_mode_current = setup.fullscreen_mode;
+
       success = TRUE;
     }
   }
@@ -354,8 +365,8 @@ void SDLCopyArea(Bitmap *src_bitmap, Bitmap *dst_bitmap,
     SDL_UpdateRect(backbuffer->surface, dst_x, dst_y, width, height);
 }
 
-void SDLFillRectangle(Bitmap *dst_bitmap, int x, int y,
-                     int width, int height, Uint32 color)
+void SDLFillRectangle(Bitmap *dst_bitmap, int x, int y, int width, int height,
+                     Uint32 color)
 {
   Bitmap *real_dst_bitmap = (dst_bitmap == window ? backbuffer : dst_bitmap);
   SDL_Rect rect;
@@ -377,49 +388,35 @@ void SDLFillRectangle(Bitmap *dst_bitmap, int x, int y,
     SDL_UpdateRect(backbuffer->surface, x, y, width, height);
 }
 
-void SDLFadeScreen(Bitmap *bitmap_cross, int fade_mode, int fade_delay,
-                  int post_delay)
+void SDLFadeRectangle(Bitmap *bitmap_cross, int x, int y, int width, int height,
+                     int fade_mode, int fade_delay, int post_delay,
+                     void (*draw_border_function)(void))
 {
   static boolean initialization_needed = TRUE;
-  static SDL_Surface *surface_screen_copy = NULL;
+  static SDL_Surface *surface_source = NULL;
+  static SDL_Surface *surface_target = NULL;
   static SDL_Surface *surface_black = NULL;
   SDL_Surface *surface_screen = backbuffer->surface;
-  SDL_Surface *surface_cross;          /* initialized later */
+  SDL_Surface *surface_cross = (bitmap_cross ? bitmap_cross->surface : NULL);
   SDL_Rect src_rect, dst_rect;
-  int src_x = 0, src_y = 0;
-  int dst_x = 0, dst_y = 0;
-  boolean fade_reverse = (fade_mode == FADE_MODE_FADE_IN ? TRUE : FALSE);
+  int src_x = x, src_y = y;
+  int dst_x = x, dst_y = y;
   unsigned int time_last, time_current;
   float alpha;
   int alpha_final;
 
   src_rect.x = src_x;
   src_rect.y = src_y;
-  src_rect.w = video.width;
-  src_rect.h = video.height;
+  src_rect.w = width;
+  src_rect.h = height;
 
   dst_x += video_xoffset;
   dst_y += video_yoffset;
 
   dst_rect.x = dst_x;
   dst_rect.y = dst_y;
-  dst_rect.w = video.width;
-  dst_rect.h = video.height;
-
-#if 0
-  if (!initialization_needed)
-  {
-    /* check if screen size has changed (can happen when toggling fullscreen) */
-    if (surface_screen_copy->w != surface_screen->w ||
-       surface_screen_copy->h != surface_screen->h)
-    {
-      SDL_FreeSurface(surface_screen_copy);
-      SDL_FreeSurface(surface_black);
-
-      initialization_needed = TRUE;
-    }
-  }
-#endif
+  dst_rect.w = width;
+  dst_rect.h = height;
 
   if (initialization_needed)
   {
@@ -431,39 +428,41 @@ void SDLFadeScreen(Bitmap *bitmap_cross, int fade_mode, int fade_delay,
     else
       flags |= SDL_SWSURFACE;
 
-    /* create surface for temporary copy of screen buffer */
-    if ((surface_screen_copy =
+    /* create surface for temporary copy of screen buffer (source) */
+    if ((surface_source =
         SDL_CreateRGBSurface(flags,
-#if 1
                              video.width,
                              video.height,
-#else
-                             surface_screen->w,
-                             surface_screen->h,
-#endif
                              surface_screen->format->BitsPerPixel,
                              surface_screen->format->Rmask,
                              surface_screen->format->Gmask,
                              surface_screen->format->Bmask,
                              surface_screen->format->Amask)) == NULL)
-      Error(ERR_EXIT, "SDL_CreateRGBSurface(   ) failed: %s", SDL_GetError());
+      Error(ERR_EXIT, "SDL_CreateRGBSurface() failed: %s", SDL_GetError());
+
+    /* create surface for cross-fading screen buffer (target) */
+    if ((surface_target =
+        SDL_CreateRGBSurface(flags,
+                             video.width,
+                             video.height,
+                             surface_screen->format->BitsPerPixel,
+                             surface_screen->format->Rmask,
+                             surface_screen->format->Gmask,
+                             surface_screen->format->Bmask,
+                             surface_screen->format->Amask)) == NULL)
+      Error(ERR_EXIT, "SDL_CreateRGBSurface() failed: %s", SDL_GetError());
 
     /* create black surface for fading from/to black */
     if ((surface_black =
         SDL_CreateRGBSurface(flags,
-#if 1
                              video.width,
                              video.height,
-#else
-                             surface_screen->w,
-                             surface_screen->h,
-#endif
                              surface_screen->format->BitsPerPixel,
                              surface_screen->format->Rmask,
                              surface_screen->format->Gmask,
                              surface_screen->format->Bmask,
                              surface_screen->format->Amask)) == NULL)
-      Error(ERR_EXIT, "SDL_CreateRGBSurface(   ) failed: %s", SDL_GetError());
+      Error(ERR_EXIT, "SDL_CreateRGBSurface() failed: %s", SDL_GetError());
 
     /* completely fill the surface with black color pixels */
     SDL_FillRect(surface_black, NULL,
@@ -472,11 +471,22 @@ void SDLFadeScreen(Bitmap *bitmap_cross, int fade_mode, int fade_delay,
     initialization_needed = FALSE;
   }
 
-  /* copy the current screen backbuffer to the temporary screen copy buffer */
-  SDL_BlitSurface(surface_screen, &dst_rect, surface_screen_copy, &src_rect);
-
-  surface_cross = (fade_mode == FADE_MODE_CROSSFADE ? bitmap_cross->surface :
-                  surface_black);
+  /* copy source and target surfaces to temporary surfaces for fading */
+  if (fade_mode == FADE_MODE_CROSSFADE)
+  {
+    SDL_BlitSurface(surface_cross,  &src_rect, surface_source, &src_rect);
+    SDL_BlitSurface(surface_screen, &dst_rect, surface_target, &src_rect);
+  }
+  else if (fade_mode == FADE_MODE_FADE_IN)
+  {
+    SDL_BlitSurface(surface_black,  &src_rect, surface_source, &src_rect);
+    SDL_BlitSurface(surface_screen, &dst_rect, surface_target, &src_rect);
+  }
+  else         /* FADE_MODE_FADE_OUT */
+  {
+    SDL_BlitSurface(surface_screen, &dst_rect, surface_source, &src_rect);
+    SDL_BlitSurface(surface_black,  &src_rect, surface_target, &src_rect);
+  }
 
   time_current = SDL_GetTicks();
 
@@ -485,18 +495,24 @@ void SDLFadeScreen(Bitmap *bitmap_cross, int fade_mode, int fade_delay,
     time_last = time_current;
     time_current = SDL_GetTicks();
     alpha += 255 * ((float)(time_current - time_last) / fade_delay);
-    alpha_final = (int)(fade_reverse ? 255.0 - alpha : alpha);
-    alpha_final = MIN(MAX(0, alpha_final), 255);
+    alpha_final = MIN(MAX(0, alpha), 255);
+
+    /* draw existing (source) image to screen buffer */
+    SDL_BlitSurface(surface_source, &src_rect, surface_screen, &dst_rect);
 
-    /* draw existing image to screen buffer */
-    SDL_BlitSurface(surface_screen_copy, &src_rect, surface_screen, &dst_rect);
+    /* draw new (target) image to screen buffer using alpha blending */
+    SDL_SetAlpha(surface_target, SDL_SRCALPHA, alpha_final);
+    SDL_BlitSurface(surface_target, &src_rect, surface_screen, &dst_rect);
 
-    /* draw new image to screen buffer using alpha blending */
-    SDL_SetAlpha(surface_cross, SDL_SRCALPHA, alpha_final);
-    SDL_BlitSurface(surface_cross, &src_rect, surface_screen, &dst_rect);
+    if (draw_border_function != NULL)
+      draw_border_function();
 
-    /* draw screen buffer to visible display */
+#if 1
+    /* only update the region of the screen that is affected from fading */
+    SDL_UpdateRect(surface_screen, dst_x, dst_y, width, height);
+#else
     SDL_Flip(surface_screen);
+#endif
   }
 
   Delay(post_delay);