Replace lock/unlock/lock/unlock by lock/unlock for efficency

svn-id: r30693

1 files changed, 2 insertions, 3 deletions

diff --git a/engines/parallaction/graphics.cpp b/engines/parallaction/graphics.cpp
index fcdf752168..c0a277dace 100644
--- a/engines/parallaction/graphics.cpp
+++ b/engines/parallaction/graphics.cpp
@@ -350,12 +350,10 @@ void Gfx::updateScreen() {
 
 	Graphics::Surface *surf = g_system->lockScreen();
 	drawGfxObjects(*surf);
-	g_system->unlockScreen();
 
 	if (_halfbrite) {
 		// FIXME: the implementation of halfbrite is now largely sub-optimal in that a full screen
 		// rewrite is needed to apply the effect.
-		surf = g_system->lockScreen();
 		byte *src = (byte*)_buffers[kBit2]->pixels;
 		byte *dst = (byte*)surf->pixels;
 		for (int i = 0; i < surf->w*surf->h; i++) {
@@ -364,9 +362,10 @@ void Gfx::updateScreen() {
 		if (_hbCircleRadius > 0) {
 			drawCircle(_hbCirclePos.x, _hbCirclePos.y, _hbCircleRadius, 0, &halfbritePixel, surf->pixels);
 		}
-		g_system->unlockScreen();
 	}
 
+	g_system->unlockScreen();
+
 	drawInventory();
 
 	drawItems();