Maniac Mansion NES: added workaround to fix dirty screen when loading a narrow room from a full width room

svn-id: r43264

1 files changed, 10 insertions, 0 deletions

diff --git a/engines/scumm/gfx.cpp b/engines/scumm/gfx.cpp
index 18cba0ab4a..be36069dd7 100644
--- a/engines/scumm/gfx.cpp
+++ b/engines/scumm/gfx.cpp
@@ -671,6 +671,16 @@ void ScummEngine::drawStripToScreen(VirtScreen *vs, int x, int width, int top, i
 					width -= 16;
 				if (width <= 0)
 					return;
+
+				// HACK: In this way we won't get a screen with dirty side strips when
+				// loading a narrow room in a full screen room.
+				if(width == 224 && height == 240 && x == 16) { 
+					char blackbuf[16 * 240];
+					memset(blackbuf, 0, 16*240); // Prepare a buffer 16px wide and 240px high, to fit on a lateral strip
+
+					width = 240; // Fix right strip
+					_system->copyRectToScreen((const byte *)blackbuf, 16, 0, 0, 16, 240); // Fix left strip
+				}
 			}
 
 		}