From 88ac15d69e550209f1a82d3090e370d2fa7d3153 Mon Sep 17 00:00:00 2001
From: Paul Gilbert
Date: Fri, 9 May 2014 22:53:37 -0400
Subject: MADS: Greyscale fading now close to the original

---
 engines/mads/palette.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'engines/mads/palette.cpp')

diff --git a/engines/mads/palette.cpp b/engines/mads/palette.cpp
index 1d3072f14b..e718059b67 100644
--- a/engines/mads/palette.cpp
+++ b/engines/mads/palette.cpp
@@ -377,7 +377,7 @@ void Fader::fadeToGrey(byte palette[PALETTE_SIZE], byte *paletteMap,
 				intensity = _colorValues[colorCtr];
 			}
 
-			int diff = intensity - palette[palCtr * 3 + colorCtr];
+			int diff = intensity - VGA_COLOR_REV(palette[palCtr * 3 + colorCtr]);
 			palIndex[palCtr][colorCtr] = (byte)ABS(diff);
 			signs[palCtr][colorCtr] = (diff == 0) ? 0 : (diff < 0 ? -1 : 1);
 		}
@@ -390,7 +390,10 @@ void Fader::fadeToGrey(byte palette[PALETTE_SIZE], byte *paletteMap,
 				map[index]._accum[colorCtr] += palIndex[palCtr][colorCtr];
 				while (map[index]._accum[colorCtr] >= steps) {
 					map[index]._accum[colorCtr] -= steps;
-					palette[palCtr * 3 + colorCtr] = signs[palCtr][colorCtr];
+
+					byte rgb63 = VGA_COLOR_REV(palette[palCtr * 3 + colorCtr]) +
+						signs[palCtr][colorCtr];
+					palette[palCtr * 3 + colorCtr] = VGA_COLOR_TRANS(rgb63);
 				}
 			}
 		}
-- 
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