From 3d558fe6ca0ad61558f5283f2ff4751b034fed5f Mon Sep 17 00:00:00 2001
From: Walter van Niftrik
Date: Wed, 24 Aug 2016 01:02:22 +0200
Subject: ADL: Make the optional scanlines less harsh

---
 engines/adl/display.cpp | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

(limited to 'engines/adl')

diff --git a/engines/adl/display.cpp b/engines/adl/display.cpp
index d05257792c..2cf50f72fc 100644
--- a/engines/adl/display.cpp
+++ b/engines/adl/display.cpp
@@ -55,6 +55,9 @@ static const byte colorPalette[COLOR_PALETTE_ENTRIES * 3] = {
 	0xf2, 0x5e, 0x00
 };
 
+// Opacity of the optional scanlines (percentage)
+#define SCANLINE_OPACITY 75
+
 // Corresponding color in second palette
 #define PAL2(X) ((X) | 0x04)
 
@@ -334,14 +337,16 @@ void Display::writeFrameBuffer(const Common::Point &p, byte color, byte mask) {
 }
 
 void Display::showScanlines(bool enable) {
-	byte pal[COLOR_PALETTE_ENTRIES * 3] = { };
+	byte pal[COLOR_PALETTE_ENTRIES * 3];
+
+	g_system->getPaletteManager()->grabPalette(pal, 0, COLOR_PALETTE_ENTRIES);
 
-	if (enable)
-		g_system->getPaletteManager()->setPalette(pal, COLOR_PALETTE_ENTRIES, COLOR_PALETTE_ENTRIES);
-	else {
-		g_system->getPaletteManager()->grabPalette(pal, 0, COLOR_PALETTE_ENTRIES);
-		g_system->getPaletteManager()->setPalette(pal, COLOR_PALETTE_ENTRIES, COLOR_PALETTE_ENTRIES);
+	if (enable) {
+		for (uint i = 0; i < ARRAYSIZE(pal); ++i)
+			pal[i] = pal[i] * (100 - SCANLINE_OPACITY) / 100;
 	}
+
+	g_system->getPaletteManager()->setPalette(pal, COLOR_PALETTE_ENTRIES, COLOR_PALETTE_ENTRIES);
 }
 
 static byte processColorBits(uint16 &bits, bool &odd, bool secondPal) {
-- 
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