CGE2: Implement setAutoColors().

Add a redefinition of closest() to do so.

3 files changed, 33 insertions, 1 deletions

diff --git a/engines/cge2/talk.cpp b/engines/cge2/talk.cpp
index 8e5773c677..f6321d3e59 100644
--- a/engines/cge2/talk.cpp
+++ b/engines/cge2/talk.cpp
@@ -31,7 +31,16 @@
 namespace CGE2 {
 
 void CGE2Engine::setAutoColors() {
-	warning("STUB: CGE2Engine::setAutoColors()");
+	Dac def[4] = {
+		{ 0, 0, 0 },
+		{ 220 >> 2, 220 >> 2, 220 >> 2 },
+		{ 190 >> 2, 190 >> 2, 190 >> 2 },
+		{ 160 >> 2, 160 >> 2, 160 >> 2 },
+	};
+	Dac pal[kPalCount];
+	_vga->getColors(pal);
+	for (int i = 0; i < 4; i++)
+		_font->_colorSet[kCBRel][i] = _vga->closest(pal, def[i]);
 }
 
 Font::Font(CGE2Engine *vm) : _vm(vm) {
diff --git a/engines/cge2/vga13h.cpp b/engines/cge2/vga13h.cpp
index 1cd2c95468..62b070dcac 100644
--- a/engines/cge2/vga13h.cpp
+++ b/engines/cge2/vga13h.cpp
@@ -913,6 +913,28 @@ uint8 Vga::closest(Dac *pal, const uint8 colR, const uint8 colG, const uint8 col
 #undef f
 }
 
+uint8 Vga::closest(Dac *pal, Dac x) {
+	int exp = (sizeof(long) * 8 - 1);
+	long D = (1 << exp) - 1; // Maximume value of long.
+	long R = x._r;
+	long G = x._g;
+	long B = x._b;
+	int idx;
+	for (int n = 0; n < 256; n++) {
+		long dR = R - pal[n]._r;
+		long dG = G - pal[n]._g;
+		long dB = B - pal[n]._b,
+			d = dR * dR + dG * dG + dB * dB;
+		if (d < D) {
+			idx = n;
+			D = d;
+			if (!d)
+				break;
+		}
+	}
+	return idx;
+}
+
 uint8 *Vga::glass(Dac *pal, const uint8 colR, const uint8 colG, const uint8 colB) {
 	uint8 *x = (uint8 *)malloc(256);
 	if (x) {
diff --git a/engines/cge2/vga13h.h b/engines/cge2/vga13h.h
index d8fe7156b6..3ed5fd559f 100644
--- a/engines/cge2/vga13h.h
+++ b/engines/cge2/vga13h.h
@@ -336,6 +336,7 @@ public:
 	void show();
 	void update();
 	void rotate();
+	uint8 closest(Dac *pal, Dac x);
 
 	void palToDac(const byte *palData, Dac *tab);
 	void dacToPal(const Dac *tab, byte *palData);