1 files changed, 69 insertions, 0 deletions
diff --git a/engines/adl/graphics.cpp b/engines/adl/graphics.cpp
new file mode 100644
index 0000000000..f9af442a9f
--- /dev/null
+++ b/engines/adl/graphics.cpp
@@ -0,0 +1,69 @@
+/* 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.
+ *
+ */
+
+#include "common/stream.h"
+#include "common/rect.h"
+
+#include "adl/display.h"
+#include "adl/graphics.h"
+
+namespace Adl {
+
+// Draws a four-connected line
+void GraphicsMan::drawLine(const Common::Point &p1, const Common::Point &p2, byte color) const {
+	int16 deltaX = p2.x - p1.x;
+	int8 xStep = 1;
+
+	if (deltaX < 0) {
+		deltaX = -deltaX;
+		xStep = -1;
+	}
+
+	int16 deltaY = p2.y - p1.y;
+	int8 yStep = -1;
+
+	if (deltaY > 0) {
+		deltaY = -deltaY;
+		yStep = 1;
+	}
+
+	Common::Point p(p1);
+	int16 steps = deltaX - deltaY + 1;
+	int16 err = deltaX + deltaY;
+
+	while (true) {
+		_display.putPixel(p, color);
+
+		if (--steps == 0)
+			return;
+
+		if (err < 0) {
+			p.y += yStep;
+			err += deltaX;
+		} else {
+			p.x += xStep;
+			err += deltaY;
+		}
+	}
+}
+
+} // End of namespace Adl