Add palette function foe He99+ games.

svn-id: r17736

3 files changed, 69 insertions, 9 deletions

diff --git a/scumm/intern.h b/scumm/intern.h
index 7abd6812f6..06e1ab6962 100644
--- a/scumm/intern.h
+++ b/scumm/intern.h
@@ -1002,6 +1002,8 @@ protected:
 	
 	uint8 *getHEPaletteIndex(int palSlot);
 	int getHEPaletteColor(int palSlot, int color);
+	int getPaletteUnk1(int palSlot, int arg_4, int arg_8, int start, int end);
+
 	void setHEPaletteColor(int palSlot, uint8 color, uint8 r, uint8 g, uint8 b);
 	void setHEPaletteFromPtr(int palSlot, const uint8 *palData);
 	void setHEPaletteFromCostume(int palSlot, int resId);
diff --git a/scumm/palette_he.cpp b/scumm/palette_he.cpp
index 4a8199a335..ed2c27ab26 100644
--- a/scumm/palette_he.cpp
+++ b/scumm/palette_he.cpp
@@ -78,6 +78,59 @@ uint8 *ScummEngine_v90he::getHEPaletteIndex(int palSlot) {
 	}
 }
 
+int ScummEngine_v90he::getPaletteUnk1(int palSlot, int arg_4, int arg_8, int start, int end) {
+	assert(palSlot >= 1 && palSlot <= _numPalettes);
+	assert(start >= 1 && start <= 255);
+	assert(end >= 1 && end <= 255);
+
+	int eax, edi, edp, edx, esi;
+	int sum, bestitem, bestsum;
+	uint8 *palPtr;
+
+	palPtr = _hePalettes + palSlot * 1024 + start * 3;
+
+	bestsum = 0xFFFFFFFF;
+	bestitem = start;
+	edp = arg_8;
+
+	for (int i = start; i <= end; i++) {
+		esi = arg_4;
+
+		edi = *palPtr++;
+		edx = *palPtr;
+		esi -= edi;
+		eax = edx;
+
+		edi = edp;
+		eax = -eax;
+		eax <<= 31;
+		eax -= edx;		
+		edi -= edx;
+
+		eax += edp;
+
+		edx = esi;
+
+		eax *= edi;
+		edx *= esi;
+
+		sum = edx + eax * 2;
+
+		palPtr += 2;
+
+		if (sum < bestsum) {
+			if (sum == 0) {
+				return i;
+			}
+
+			bestsum = sum;
+			bestitem = i;
+		}
+	}
+
+	return bestitem;
+}
+
 int ScummEngine_v90he::getHEPaletteColor(int palSlot, int color) {
 	assert(palSlot >= 1 && palSlot <= _numPalettes);
 	assert(color >= 1 && color <= 255);
diff --git a/scumm/script_v90he.cpp b/scumm/script_v90he.cpp
index d2567d7bb0..28bfc3175f 100644
--- a/scumm/script_v90he.cpp
+++ b/scumm/script_v90he.cpp
@@ -2256,6 +2256,7 @@ void ScummEngine_v90he::o90_getObjectData() {
 }
 
 void ScummEngine_v90he::o90_getPaletteData() {
+	int b, c, d, e;
 	int palSlot, color;
 
 	byte subOp = fetchScriptByte();
@@ -2263,13 +2264,13 @@ void ScummEngine_v90he::o90_getPaletteData() {
 
 	switch (subOp) {
 	case 0:
+		e = pop();
+		d = pop();
+		palSlot = pop();
 		pop();
-		pop();
-		pop();
-		pop();
-		pop();
-		pop();
-		push(0);
+		c = pop();
+		b = pop();
+		push(getPaletteUnk1(palSlot, b, c, d, e));
 		break;
 	case 7:
 		pop();
@@ -2289,9 +2290,13 @@ void ScummEngine_v90he::o90_getPaletteData() {
 		break;
 	case 172:
 		pop();
-		pop();
-		pop();
-		push(0);
+		c = pop();
+		c = MAX(0, c);
+		c = MIN(c, 255);
+		b = pop();
+		b = MAX(0, b);
+		b = MIN(b, 255);
+		push(getPaletteUnk1(1, b, c, 10, 245));
 		break;
 	default:
 		error("o90_getPaletteData: Unknown case %d", subOp);