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engines/mm/mm1/gfx/gfx.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/system.h"
+#include "common/debug.h"
+#include "graphics/paletteman.h"
+#include "graphics/screen.h"
+#include "mm/mm1/gfx/gfx.h"
+
+namespace MM {
+namespace MM1 {
+namespace Gfx {
+
+byte EGA_INDEXES[EGA_PALETTE_COUNT];
+
+static const uint32 EGA_PALETTE[16] = {
+	0x000000, 0x0000aa, 0x00aa00, 0x00aaaa,
+	0xaa0000, 0xaa00aa, 0xaa5500, 0xaaaaaa,
+	0x555555, 0x5555ff, 0x55ff55, 0x55ffff,
+	0xff5555, 0xff55ff, 0xffff55, 0xffffff
+};
+
+
+void GFX::setEgaPalette() {
+	byte pal[16 * 3];
+	byte *pDest = pal;
+
+	for (int i = 0; i < EGA_PALETTE_COUNT; ++i) {
+		*pDest++ = (EGA_PALETTE[i] >> 16) & 0xff;
+		*pDest++ = (EGA_PALETTE[i] >> 8) & 0xff;
+		*pDest++ = EGA_PALETTE[i] & 0xff;
+		EGA_INDEXES[i] = i;
+	}
+
+	g_system->getPaletteManager()->setPalette(pal, 0, 16);
+
+	uint32 c = 0xffffffff;
+	g_system->getPaletteManager()->setPalette((const byte *)&c, 255, 1);
+
+	// Set the EGA palette indexes to be themselves
+}
+
+void GFX::findPalette(const byte palette[256 * 3]) {
+	for (int col = 0; col < 16; ++col) {
+		byte r = (EGA_PALETTE[col] >> 16) & 0xff;
+		byte g = (EGA_PALETTE[col] >> 8) & 0xff;
+		byte b = EGA_PALETTE[col] & 0xff;
+		int closestDiff = 0x7fffffff;
+		byte closest = 0;
+		const byte *pal = &palette[0];
+
+		for (int i = 0; i < 256; ++i, pal += 3) {
+			int diff = ABS((int)r - (int)pal[0]) +
+				ABS((int)g - (int)pal[1]) +
+				ABS((int)b - (int)pal[2]);
+			if (diff < closestDiff) {
+				closestDiff = diff;
+				closest = i;
+			}
+		}
+
+		EGA_INDEXES[col] = closest;
+	}
+}
+
+} // namespace Gfx
+} // namespace MM1
+} // namespace MM