SCI: adding force to memorial area for SQ3/intro

makes the view getting fully undithered

svn-id: r54068

3 files changed, 15 insertions, 0 deletions

diff --git a/engines/sci/graphics/picture.cpp b/engines/sci/graphics/picture.cpp
index 39666b82cb..6f2ca9e26d 100644
--- a/engines/sci/graphics/picture.cpp
+++ b/engines/sci/graphics/picture.cpp
@@ -754,6 +754,15 @@ void GfxPicture::drawVectorData(byte *data, int dataSize) {
 			// Dithering EGA pictures
 			if (isEGA) {
 				_screen->dither(_addToFlag);
+				switch (g_sci->getGameId()) {
+				case GID_SQ3:
+					switch (_resourceId) {
+					case 154: // SQ3: intro, ship gets sucked in
+						_screen->ditherForceMemorial(0xD0);
+						break;
+					}
+					break;
+				}
 			}
 			return;
 		default:
diff --git a/engines/sci/graphics/screen.cpp b/engines/sci/graphics/screen.cpp
index 7a10a6b749..f8dc3118b5 100644
--- a/engines/sci/graphics/screen.cpp
+++ b/engines/sci/graphics/screen.cpp
@@ -616,6 +616,11 @@ void GfxScreen::dither(bool addToFlag) {
 	}
 }
 
+// Force a color combination into memorial
+void GfxScreen::ditherForceMemorial(byte color) {
+	_unditherMemorial[color] = 256;
+}
+
 void GfxScreen::debugUnditherSetState(bool flag) {
 	_unditherState = flag;
 }
diff --git a/engines/sci/graphics/screen.h b/engines/sci/graphics/screen.h
index 97f5736289..44746ae00b 100644
--- a/engines/sci/graphics/screen.h
+++ b/engines/sci/graphics/screen.h
@@ -115,6 +115,7 @@ public:
 	void adjustBackUpscaledCoordinates(int16 &y, int16 &x);
 
 	void dither(bool addToFlag);
+	void ditherForceMemorial(byte color);
 	void debugUnditherSetState(bool flag);
 	int16 *unditherGetMemorial();