1 files changed, 138 insertions, 0 deletions
diff --git a/engines/kyra/screen_mr.cpp b/engines/kyra/screen_mr.cpp
new file mode 100644
index 0000000000..0fcfe00879
--- /dev/null
+++ b/engines/kyra/screen_mr.cpp
@@ -0,0 +1,138 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "kyra/screen_mr.h"
+
+#include "kyra/kyra_mr.h"
+
+namespace Kyra {
+
+Screen_MR::Screen_MR(KyraEngine_MR *vm, OSystem *system) : Screen_v2(vm, system) {
+}
+
+Screen_MR::~Screen_MR() {
+}
+
+void Screen_MR::setScreenDim(int dim) {
+	debugC(9, kDebugLevelScreen, "Screen_MR::setScreenDim(%d)", dim);
+	assert(dim < _screenDimTableCount);
+	_curDim = &_screenDimTable[dim];
+}
+
+const ScreenDim *Screen_MR::getScreenDim(int dim) {
+	debugC(9, kDebugLevelScreen, "Screen_MR::getScreenDim(%d)", dim);
+	assert(dim < _screenDimTableCount);
+	return &_screenDimTable[dim];
+}
+
+int Screen_MR::getLayer(int x, int y) {
+	debugC(9, kDebugLevelScreen, "Screen_MR::getLayer(%d, %d)", x, y);
+	if (x < 0)
+		x = 0;
+	else if (x >= 320)
+		x = 319;
+	if (y < 0)
+		y = 0;
+	else if (y >= 188)
+		y = 187;
+
+	if (y < _maskMinY || y > _maskMaxY)
+		return 15;
+
+	uint8 pixel = *(getCPagePtr(5) + y * 320 + x);
+	pixel &= 0x7F;
+	pixel >>= 3;
+
+	if (pixel < 1)
+		pixel = 1;
+	else if (pixel > 15)
+		pixel = 15;
+	return pixel;
+}
+
+byte Screen_MR::getShapeFlag1(int x, int y) {
+	debugC(9, kDebugLevelScreen, "Screen_MR::getShapeFlag1(%d, %d)", x, y);
+	if (y < _maskMinY || y > _maskMaxY)
+		return 0;
+
+	uint8 color = _shapePages[0][y * SCREEN_W + x];
+	color &= 0x80;
+	color ^= 0x80;
+
+	if (color & 0x80)
+		return 1;
+	return 0;
+}
+
+byte Screen_MR::getShapeFlag2(int x, int y) {
+	debugC(9, kDebugLevelScreen, "Screen_MR::getShapeFlag2(%d, %d)", x, y);
+	if (y < _maskMinY || y > _maskMaxY)
+		return 0;
+
+	uint8 color = _shapePages[0][y * SCREEN_W + x];
+	color &= 0x7F;
+	color &= 0x87;
+	return color;
+}
+
+int Screen_MR::getDrawLayer(int x, int y) {
+	debugC(9, kDebugLevelScreen, "Screen_MR::getDrawLayer(%d, %d)", x, y);
+	int xpos = x - 8;
+	int ypos = y;
+	int layer = 1;
+
+	for (int curX = xpos; curX < xpos + 24; ++curX) {
+		int tempLayer = getShapeFlag2(curX, ypos);
+
+		if (layer < tempLayer)
+			layer = tempLayer;
+
+		if (layer >= 7)
+			return 7;
+	}
+	return layer;
+}
+
+int Screen_MR::getDrawLayer2(int x, int y, int height) {
+	debugC(9, kDebugLevelScreen, "Screen_MR::getDrawLayer2(%d, %d, %d)", x, y, height);
+	int xpos = x - 8;
+	int ypos = y;
+	int layer = 1;
+
+	for (int useX = xpos; useX < xpos + 24; ++useX) {
+		for (int useY = ypos - height; useY < ypos; ++useY) {
+			int tempLayer = getShapeFlag2(useX, useY);
+
+			if (tempLayer > layer)
+				layer = tempLayer;
+
+			if (tempLayer >= 7)
+				return 7;
+		}
+	}
+	return layer;
+}
+
+} // end of namespace Kyra