HDB: Make _globalSurface Back Buffer

Modify drawMan to use _globalSurface as a copy of
the whole screen

3 files changed, 14 insertions, 10 deletions

diff --git a/engines/hdb/draw-manager.cpp b/engines/hdb/draw-manager.cpp
index 69d946cd7d..1a49b3050b 100644
--- a/engines/hdb/draw-manager.cpp
+++ b/engines/hdb/draw-manager.cpp
@@ -97,7 +97,7 @@ bool DrawMan::init() {
 
 void DrawMan::fillScreen(uint32 color) {
 	_globalSurface.fillRect(Common::Rect(kScreenWidth, kScreenHeight), color);
-	g_system->copyRectToScreen(_globalSurface.getBasePtr(0, 0), _globalSurface.pitch, 0, 0, _globalSurface.w, _globalSurface.h);
+//	g_system->copyRectToScreen(_globalSurface.getBasePtr(0, 0), _globalSurface.pitch, 0, 0, _globalSurface.w, _globalSurface.h);
 }
 
 Tile *DrawMan::getTile(int index) {
@@ -270,14 +270,14 @@ Graphics::Surface Picture::load(Common::SeekableReadStream *stream) {
 }
 
 void Picture::draw(int x, int y) {
-	g_system->copyRectToScreen(_surface.getBasePtr(0, 0), _surface.pitch, x, y, _surface.w, _surface.h);
+	g_hdb->_drawMan->_globalSurface.copyRectToSurface(_surface.getBasePtr(0, 0), _surface.pitch, x, y, _surface.w, _surface.h);
+//	g_system->copyRectToScreen(_surface.getBasePtr(0, 0), _surface.pitch, x, y, _surface.w, _surface.h);
 }
 
 void Picture::drawMasked(int x, int y) {
-	Graphics::ManagedSurface tempSurf;
-	tempSurf.create(_surface.w, _surface.h);
-	tempSurf.transBlitFrom(_surface, 0xf81f);
-	g_system->copyRectToScreen(tempSurf.getBasePtr(0, 0), tempSurf.pitch, x, y, tempSurf.w, tempSurf.h);
+	_surface.transBlitFrom(_surface, 0xf81f);
+	g_hdb->_drawMan->_globalSurface.copyRectToSurface(_surface.getBasePtr(0, 0), _surface.pitch, x, y, _surface.w, _surface.h);
+//	g_system->copyRectToScreen(tempSurf.getBasePtr(0, 0), tempSurf.pitch, x, y, tempSurf.w, tempSurf.h);
 }
 
 Tile::~Tile() {
@@ -305,7 +305,8 @@ Graphics::Surface Tile::load(Common::SeekableReadStream *stream) {
 }
 
 void Tile::draw(int x, int y) {
-	g_system->copyRectToScreen(_surface.getBasePtr(0, 0), _surface.pitch, x, y, _surface.w, _surface.h);
+	g_hdb->_drawMan->_globalSurface.copyRectToSurface(_surface.getBasePtr(0, 0), _surface.pitch, x, y, _surface.w, _surface.h);
+//	g_system->copyRectToScreen(_surface.getBasePtr(0, 0), _surface.pitch, x, y, _surface.w, _surface.h);
 }
 
 }
diff --git a/engines/hdb/draw-manager.h b/engines/hdb/draw-manager.h
index f6909918ed..cb4f8182ba 100644
--- a/engines/hdb/draw-manager.h
+++ b/engines/hdb/draw-manager.h
@@ -55,6 +55,8 @@ public:
 	DrawMan();
 	~DrawMan();
 
+	Graphics::ManagedSurface _globalSurface;
+
 	bool init();
 	void fillScreen(uint32 color);
 	Tile *getTile(int index);
@@ -69,7 +71,6 @@ public:
 	void drawSky();
 
 private:
-	Graphics::ManagedSurface _globalSurface;
 	int _numTiles;
 	TileLookup *_tLookupArray;
 	uint16 _skyTiles[kMaxSkies];
@@ -109,7 +110,7 @@ private:
 	uint _width, _height;
 	char _name[64];
 
-	Graphics::Surface _surface;
+	Graphics::ManagedSurface _surface;
 
 };
 
@@ -126,7 +127,7 @@ public:
 private:
 	char _name[64];
 
-	Graphics::Surface _surface;
+	Graphics::ManagedSurface _surface;
 };
 
 } // End of Namespace HDB
diff --git a/engines/hdb/hdb.cpp b/engines/hdb/hdb.cpp
index 1b86838417..c0fd7bee57 100644
--- a/engines/hdb/hdb.cpp
+++ b/engines/hdb/hdb.cpp
@@ -188,6 +188,8 @@ Common::Error HDBGame::run() {
 			}
 		}
 
+		Graphics::ManagedSurface backBuffer = _drawMan->_globalSurface;
+		g_system->copyRectToScreen(backBuffer.getBasePtr(0, 0), backBuffer.pitch, 0, 0, backBuffer.w, backBuffer.h);
 		g_system->updateScreen();
 		g_system->delayMillis(10);
 	}