Drascula: Fixed bug #2826608.

Bug #2826608: "DRASCULA: Cursor GFX error" fixed by introducing
separate buffer for cursors. This also fixes the root cause of
the problem.

svn-id: r49713

4 files changed, 6 insertions, 1 deletions

diff --git a/engines/drascula/drascula.cpp b/engines/drascula/drascula.cpp
index b16182e3e2..4c38a87291 100644
--- a/engines/drascula/drascula.cpp
+++ b/engines/drascula/drascula.cpp
@@ -244,6 +244,8 @@ Common::Error DrasculaEngine::run() {
 		if (currentChapter != 3)
 			loadPic(96, frontSurface, COMPLETE_PAL);
 
+		loadPic(99, cursorSurface);
+
 		if (currentChapter == 1) {
 		} else if (currentChapter == 2) {
 			loadPic("pts.alg", drawSurface2);
diff --git a/engines/drascula/drascula.h b/engines/drascula/drascula.h
index aaa1a4f42a..0a8b7c8c9b 100644
--- a/engines/drascula/drascula.h
+++ b/engines/drascula/drascula.h
@@ -391,6 +391,7 @@ public:
 	// Graphics buffers/pointers
 	byte *bgSurface;
 	byte *backSurface;
+	byte *cursorSurface;
 	byte *drawSurface3;
 	byte *drawSurface2;
 	byte *tableSurface;
diff --git a/engines/drascula/graphics.cpp b/engines/drascula/graphics.cpp
index 28ade30601..088e1e1da9 100644
--- a/engines/drascula/graphics.cpp
+++ b/engines/drascula/graphics.cpp
@@ -54,6 +54,7 @@ void DrasculaEngine::allocMemory() {
 	assert(crosshairCursor);
 	mouseCursor = (byte *)malloc(OBJWIDTH * OBJHEIGHT);
 	assert(mouseCursor);
+	cursorSurface = (byte *)malloc(64000);
 }
 
 void DrasculaEngine::freeMemory() {
@@ -67,6 +68,7 @@ void DrasculaEngine::freeMemory() {
 	free(frontSurface);
 	free(crosshairCursor);
 	free(mouseCursor);
+	free(cursorSurface);
 }
 
 void DrasculaEngine::moveCursor() {
diff --git a/engines/drascula/interface.cpp b/engines/drascula/interface.cpp
index 507cc6e123..38be3c6d5c 100644
--- a/engines/drascula/interface.cpp
+++ b/engines/drascula/interface.cpp
@@ -78,7 +78,7 @@ void DrasculaEngine::selectVerb(int verb) {
 	}
 
 	for (int i = 0; i < OBJHEIGHT; i++)
-		memcpy(mouseCursor + i * OBJWIDTH, backSurface + OBJWIDTH * verb + (c + i) * 320, OBJWIDTH);
+		memcpy(mouseCursor + i * OBJWIDTH, cursorSurface + OBJWIDTH * verb + (c + i) * 320, OBJWIDTH);
 	setCursor(kCursorCurrentItem);
 
 	if (verb > 0) {