(svn r24388) -Fix [FS#5233]: Do not consider not finding a particular base set critical; just load a different one and display an in-game error later on.

src/error.h

@@ -48,6 +48,8 @@ public:
 	void CopyOutDParams();
 };
 
+void ScheduleErrorMessage(const ErrorMessageData &data);
+
 void ShowErrorMessage(StringID summary_msg, StringID detailed_msg, WarningLevel wl, int x = 0, int y = 0, uint textref_stack_size = 0, const uint32 *textref_stack = NULL);
 void ClearErrorMessages();
 void ShowFirstError();

src/error_gui.cpp

@@ -417,3 +417,13 @@ void ScheduleErrorMessage(ErrorList &datas)
 {
 	_error_list.splice(_error_list.end(), datas);
 }
+
+/**
+ * Schedule an error.
+ * Note: This does not try to display the error now. This is useful if the window system is not yet running.
+ * @param data Error message data; cleared afterwards
+ */
+void ScheduleErrorMessage(const ErrorMessageData &data)
+{
+	_error_list.push_back(data);
+}

src/lang/english.txt

@@ -1543,6 +1543,9 @@ STR_CONFIG_ERROR_INVALID_GRF_INCOMPATIBLE                       :incompatible to
 STR_CONFIG_ERROR_INVALID_GRF_UNKNOWN                            :unknown
 STR_CONFIG_ERROR_INVALID_SAVEGAME_COMPRESSION_LEVEL             :{WHITE}... compression level '{RAW_STRING}' is not valid
 STR_CONFIG_ERROR_INVALID_SAVEGAME_COMPRESSION_ALGORITHM         :{WHITE}... savegame format '{RAW_STRING}' is not available. Reverting to '{RAW_STRING}'
+STR_CONFIG_ERROR_INVALID_BASE_GRAPHICS_NOT_FOUND                :{WHITE}... ignoring Base Graphics set '{RAW_STRING}': not found
+STR_CONFIG_ERROR_INVALID_BASE_SOUNDS_NOT_FOUND                  :{WHITE}... ignoring Base Sounds set '{RAW_STRING}': not found
+STR_CONFIG_ERROR_INVALID_BASE_MUSIC_NOT_FOUND                   :{WHITE}... ignoring Base Music set '{RAW_STRING}': not found
 
 # Intro window
 STR_INTRO_CAPTION                                               :{WHITE}OpenTTD {REV}

src/openttd.cpp

@@ -725,8 +725,14 @@ int ttd_main(int argc, char *argv[])
 
 	BaseGraphics::FindSets();
 	if (graphics_set == NULL && BaseGraphics::ini_set != NULL) graphics_set = strdup(BaseGraphics::ini_set);
-	if (!BaseGraphics::SetSet(graphics_set) && !StrEmpty(graphics_set)) {
-		usererror("Failed to select requested graphics set '%s'", graphics_set);
+	if (!BaseGraphics::SetSet(graphics_set)) {
+		if (!StrEmpty(graphics_set)) {
+			BaseGraphics::SetSet(NULL);
+
+			ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_BASE_GRAPHICS_NOT_FOUND);
+			msg.SetDParamStr(0, graphics_set);
+			ScheduleErrorMessage(msg);
+		}
 	}
 	free(graphics_set);
 
@@ -785,18 +791,26 @@ int ttd_main(int argc, char *argv[])
 	BaseSounds::FindSets();
 	if (sounds_set == NULL && BaseSounds::ini_set != NULL) sounds_set = strdup(BaseSounds::ini_set);
 	if (!BaseSounds::SetSet(sounds_set)) {
-		StrEmpty(sounds_set) ?
-			usererror("Failed to find a sounds set. Please acquire a sounds set for OpenTTD. See section 4.1 of readme.txt.") :
-			usererror("Failed to select requested sounds set '%s'", sounds_set);
+		if (StrEmpty(sounds_set) || !BaseSounds::SetSet(NULL)) {
+			usererror("Failed to find a sounds set. Please acquire a sounds set for OpenTTD. See section 4.1 of readme.txt.");
+		} else {
+			ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_BASE_SOUNDS_NOT_FOUND);
+			msg.SetDParamStr(0, sounds_set);
+			ScheduleErrorMessage(msg);
+		}
 	}
 	free(sounds_set);
 
 	BaseMusic::FindSets();
 	if (music_set == NULL && BaseMusic::ini_set != NULL) music_set = strdup(BaseMusic::ini_set);
 	if (!BaseMusic::SetSet(music_set)) {
-		StrEmpty(music_set) ?
-			usererror("Failed to find a music set. Please acquire a music set for OpenTTD. See section 4.1 of readme.txt.") :
-			usererror("Failed to select requested music set '%s'", music_set);
+		if (StrEmpty(music_set) || !BaseMusic::SetSet(NULL)) {
+			usererror("Failed to find a music set. Please acquire a music set for OpenTTD. See section 4.1 of readme.txt.");
+		} else {
+			ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_BASE_MUSIC_NOT_FOUND);
+			msg.SetDParamStr(0, music_set);
+			ScheduleErrorMessage(msg);
+		}
 	}
 	free(music_set);