From febc5150c9ee3f2df2a1cad8ef527d9541697b22 Mon Sep 17 00:00:00 2001
From: smatz <smatz@openttd.org>
Date: Thu, 3 Apr 2008 19:55:40 +0000
Subject: (svn r12547) -Feature: invisibility options to make objects invisible
 instead of transparent

---
 src/transparency.h | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'src/transparency.h')

diff --git a/src/transparency.h b/src/transparency.h
index eb19d6938..35d8cbde7 100644
--- a/src/transparency.h
+++ b/src/transparency.h
@@ -28,6 +28,7 @@ enum TransparencyOption {
 typedef uint TransparencyOptionBits; ///< transparency option bits
 extern TransparencyOptionBits _transparency_opt;
 extern TransparencyOptionBits _transparency_lock;
+extern TransparencyOptionBits _invisibility_opt;
 
 /**
  * Check if the transparency option bit is set
@@ -40,6 +41,17 @@ static inline bool IsTransparencySet(TransparencyOption to)
 	return (HasBit(_transparency_opt, to) && _game_mode != GM_MENU);
 }
 
+/**
+ * Check if the invisibility option bit is set
+ * and if we aren't in the game menu (there's never transparency)
+ *
+ * @param to the structure which invisibility option is ask for
+ */
+static inline bool IsInvisibilitySet(TransparencyOption to)
+{
+	return (HasBit(_transparency_opt & _invisibility_opt, to) && _game_mode != GM_MENU);
+}
+
 /**
  * Toggle the transparency option bit
  *
@@ -50,6 +62,34 @@ static inline void ToggleTransparency(TransparencyOption to)
 	ToggleBit(_transparency_opt, to);
 }
 
+/**
+ * Toggle the invisibility option bit
+ *
+ * @param to the structure which invisibility option is toggle
+ */
+static inline void ToggleInvisibility(TransparencyOption to)
+{
+	ToggleBit(_invisibility_opt, to);
+}
+
+/**
+ * Toggles between invisible and solid state.
+ * If object is transparent, then it is made invisible.
+ * Used by the keyboard shortcuts.
+ *
+ * @param to the object type which invisibility option to toggle
+ */
+static inline void ToggleInvisibilityWithTransparency(TransparencyOption to)
+{
+	if (IsInvisibilitySet(to)) {
+		ClrBit(_invisibility_opt, to);
+		ClrBit(_transparency_opt, to);
+	} else {
+		SetBit(_invisibility_opt, to);
+		SetBit(_transparency_opt, to);
+	}
+}
+
 /**
  * Toggle the transparency lock bit
  *
-- 
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