Implemented horizontal scrolling for BRA, by using a back buffer. Dialogues in scrollable locations are a bit messed up for the moment.

svn-id: r35253

1 files changed, 15 insertions, 1 deletions

diff --git a/engines/parallaction/graphics.h b/engines/parallaction/graphics.h
index 90cc5f55b7..662bfc6b59 100644
--- a/engines/parallaction/graphics.h
+++ b/engines/parallaction/graphics.h
@@ -572,7 +572,6 @@ protected:
 
 	// frame data stored in programmable variables
 	int32				_varBackgroundMode;	// 1 = normal, 2 = only mask
-	int32				_varScrollX;
 	int32				_varAnimRenderMode;	// 1 = normal, 2 = flat
 	int32				_varMiscRenderMode;	// 1 = normal, 2 = flat
 	int32				_varRenderMode;
@@ -580,6 +579,18 @@ protected:
 	Graphics::Surface 	_bitmapMask;
 	int32 				getRenderMode(const char *type);
 
+	Graphics::Surface	*lockScreen();
+	void				unlockScreen();
+	void 				updateScreenIntern();
+
+	bool				_doubleBuffering;
+	int					_gameType;
+	Graphics::Surface	_backBuffer;
+	void 				copyRectToScreen(const byte *buf, int pitch, int x, int y, int w, int h);
+
+	int					_scrollPos;
+	int					_minScroll, _maxScroll;
+
 public:
 
 	struct Item {
@@ -605,6 +616,9 @@ public:
 
 	void copyRect(const Common::Rect &r, Graphics::Surface &src, Graphics::Surface &dst);
 
+	int getScrollPos();
+	void setScrollPos(int scrollX);
+
 	// low level text and patches
 	void drawText(Font *font, Graphics::Surface* surf, uint16 x, uint16 y, const char *text, byte color);