+static int getTitleScreenGraphic(int nr, boolean initial)
+{
+ return (initial ? IMG_TITLESCREEN_INITIAL_1 : IMG_TITLESCREEN_1) + nr;
+}
+
+static struct TitleMessageInfo *getTitleMessageInfo(int nr, boolean initial)
+{
+ return (initial ? &titlemessage_initial[nr] : &titlemessage[nr]);
+}
+
+#if 0
+static int getTitleScreenGameMode(boolean initial)
+{
+ return (initial ? GAME_MODE_TITLE_INITIAL : GAME_MODE_TITLE);
+}
+#endif
+
+static int getTitleMessageGameMode(boolean initial)
+{
+ return (initial ? GAME_MODE_MESSAGE_INITIAL : GAME_MODE_MESSAGE);
+}
+
+static int getTitleScreenBackground(boolean initial)
+{
+ return (initial ? IMG_BACKGROUND_TITLE_INITIAL : IMG_BACKGROUND_TITLE);
+}
+
+static int getTitleMessageBackground(boolean initial)
+{
+ return (initial ? IMG_BACKGROUND_MESSAGE_INITIAL : IMG_BACKGROUND_MESSAGE);
+}
+
+static int getTitleSound(int nr, boolean initial, boolean is_image)
+{
+ int mode = (is_image ?
+ (initial ? GAME_MODE_TITLE_INITIAL : GAME_MODE_TITLE) :
+ (initial ? GAME_MODE_MESSAGE_INITIAL : GAME_MODE_MESSAGE));
+ int base = (is_image ?
+ (initial ? SND_TITLESCREEN_INITIAL_1 : SND_TITLESCREEN_1) :
+ (initial ? SND_TITLEMESSAGE_INITIAL_1 : SND_TITLEMESSAGE_1));
+
+ int sound_global = menu.sound[mode];
+ int sound_local = base + nr;
+
+#if 0
+ printf("::: %d, %d, %d: %d ['%s'], %d ['%s']\n",
+ nr, initial, is_image,
+ sound_global, getSoundListEntry(sound_global)->filename,
+ sound_local, getSoundListEntry(sound_local)->filename);
+#endif
+
+ if (!strEqual(getSoundListEntry(sound_local)->filename, UNDEFINED_FILENAME))
+ return sound_local;
+
+ if (!strEqual(getSoundListEntry(sound_global)->filename, UNDEFINED_FILENAME))
+ return sound_global;
+
+ return SND_UNDEFINED;
+}
+
+static int getTitleMusic(int nr, boolean initial, boolean is_image)
+{
+ int mode = (is_image ?
+ (initial ? GAME_MODE_TITLE_INITIAL : GAME_MODE_TITLE) :
+ (initial ? GAME_MODE_MESSAGE_INITIAL : GAME_MODE_MESSAGE));
+ int base = (is_image ?
+ (initial ? MUS_TITLESCREEN_INITIAL_1 : MUS_TITLESCREEN_1) :
+ (initial ? MUS_TITLEMESSAGE_INITIAL_1 : MUS_TITLEMESSAGE_1));
+
+ int music_global = menu.music[mode];
+ int music_local = base + nr;
+
+#if 0
+ printf("::: %d, %d, %d: %d ['%s'], %d ['%s']\n",
+ nr, initial, is_image,
+ music_global, getMusicListEntry(music_global)->filename,
+ music_local, getMusicListEntry(music_local)->filename);
+#endif
+
+ if (!strEqual(getMusicListEntry(music_local)->filename, UNDEFINED_FILENAME))
+ return music_local;
+
+ if (!strEqual(getMusicListEntry(music_global)->filename, UNDEFINED_FILENAME))
+ return music_global;
+
+ return MUS_UNDEFINED;
+}
+
+static int compareTitleControlInfo(const void *object1, const void *object2)
+{
+ const struct TitleControlInfo *tci1 = (struct TitleControlInfo *)object1;
+ const struct TitleControlInfo *tci2 = (struct TitleControlInfo *)object2;
+ int compare_result;
+
+ if (tci1->initial != tci2->initial)
+ compare_result = (tci1->initial ? -1 : +1);
+ else if (tci1->sort_priority != tci2->sort_priority)
+ compare_result = tci1->sort_priority - tci2->sort_priority;
+ else if (tci1->is_image != tci2->is_image)
+ compare_result = (tci1->is_image ? -1 : +1);
+ else
+ compare_result = tci1->local_nr - tci2->local_nr;
+
+ return compare_result;
+}
+
+static void InitializeTitleControlsExt_AddTitleInfo(boolean is_image,
+ boolean initial,
+ int nr, int sort_priority)
+{
+ title_controls[num_title_screens].is_image = is_image;
+ title_controls[num_title_screens].initial = initial;
+ title_controls[num_title_screens].local_nr = nr;
+ title_controls[num_title_screens].sort_priority = sort_priority;
+
+ num_title_screens++;
+}
+
+static void InitializeTitleControls_CheckTitleInfo(boolean initial)
+{
+ int i;
+
+ for (i = 0; i < MAX_NUM_TITLE_IMAGES; i++)
+ {
+ int graphic = getTitleScreenGraphic(i, initial);
+ Bitmap *bitmap = graphic_info[graphic].bitmap;
+ int sort_priority = graphic_info[graphic].sort_priority;
+
+ if (bitmap != NULL)
+ InitializeTitleControlsExt_AddTitleInfo(TRUE, initial, i, sort_priority);
+ }
+
+ for (i = 0; i < MAX_NUM_TITLE_MESSAGES; i++)
+ {
+ struct TitleMessageInfo *tmi = getTitleMessageInfo(i, initial);
+ char *filename = getLevelSetTitleMessageFilename(i, initial);
+ int sort_priority = tmi->sort_priority;
+
+ if (filename != NULL)
+ InitializeTitleControlsExt_AddTitleInfo(FALSE, initial, i, sort_priority);
+ }
+}
+
+static void InitializeTitleControls(boolean show_title_initial)
+{
+ num_title_screens = 0;
+
+ if (show_title_initial)
+ InitializeTitleControls_CheckTitleInfo(TRUE);
+
+ InitializeTitleControls_CheckTitleInfo(FALSE);
+
+ /* sort title screens according to sort_priority and title number */
+ qsort(title_controls, num_title_screens, sizeof(struct TitleControlInfo),
+ compareTitleControlInfo);
+}
+
+static boolean visibleMenuPos(struct MenuPosInfo *pos)
+{
+ return (pos != NULL && pos->x != -1 && pos->y != -1);
+}
+
+static boolean visibleTextPos(struct TextPosInfo *pos)
+{
+ return (pos != NULL && pos->x != -1 && pos->y != -1);
+}
+