From 0847b338c691a825ba05d506a08089c3b9cebe9f Mon Sep 17 00:00:00 2001
From: alberth <alberth@openttd.org>
Date: Wed, 2 Sep 2009 20:28:41 +0000
Subject: (svn r17389) -Codechange: Add support for shaded viewports.

---
 src/widget.cpp | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'src/widget.cpp')

diff --git a/src/widget.cpp b/src/widget.cpp
index 19509e040..77f2da21a 100644
--- a/src/widget.cpp
+++ b/src/widget.cpp
@@ -10,6 +10,7 @@
 /** @file widget.cpp Handling of the default/simple widgets. */
 
 #include "stdafx.h"
+#include "openttd.h"
 #include "company_func.h"
 #include "gfx_func.h"
 #include "window_gui.h"
@@ -17,6 +18,7 @@
 #include "zoom_func.h"
 #include "debug.h"
 #include "strings_func.h"
+#include "transparency.h"
 
 #include "table/sprites.h"
 #include "table/strings.h"
@@ -1866,7 +1868,20 @@ void NWidgetViewport::StoreWidgets(Widget *widgets, int length, bool left_moving
 
 void NWidgetViewport::Draw(const Window *w)
 {
-	w->DrawViewport();
+	if (this->disp_flags & ND_NO_TRANSPARENCY) {
+		TransparencyOptionBits to_backup = _transparency_opt;
+		_transparency_opt = 0; // Disable all transparency
+		w->DrawViewport();
+		_transparency_opt = to_backup;
+	} else {
+		w->DrawViewport();
+	}
+
+	/* Optionally shade the viewport. */
+	if (this->disp_flags & (ND_SHADE_GREY | ND_SHADE_DIMMED)) {
+		GfxFillRect(this->pos_x, this->pos_y, this->pos_x + this->current_x - 1, this->pos_y + this->current_y - 1,
+				(this->disp_flags & ND_SHADE_DIMMED) ? PALETTE_TO_TRANSPARENT : PALETTE_TO_STRUCT_GREY, FILLRECT_RECOLOUR);
+	}
 }
 
 Scrollbar *NWidgetViewport::FindScrollbar(Window *w, bool allow_next)
-- 
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