Removed the Surface class in favor of small struct specially made for the

block surfaces. (A block surface is a 64x64 tile of a parallax layer.)

I've also done a few things to try and optimize the drawing:

* The back buffer is no longer cleared between frames. This may cause
  regressions, but I do believe that the entire picture area is always
  completely re-rendered for each frame.

  As a result of this, the menu code is now responsible for clearing the
  icon areas itself.

* A few unnecessary copy_rect() calls were commented out in favor of one
  big copy_rect() in ServiceWindows().

* Completely opaque block surfaces are copied with memcpy(), one line at a
  time.

Unless we manage to add intelligent screen redrawing, I don't think it will
get that much faster than this, though there is some unnecessary data
copying in DrawSprite() that could be removed.

And the game is still a terrible CPU hog. I believe the animation runs at
approximately 12 fps. If there's still time left, it will pump out further
frames to get smooth scrolling. We ought to put a cap on that, and if it
has already reached the scroll target it should sleep for the rest of the
render cycle.

svn-id: r9886

1 files changed, 1 insertions, 1 deletions

diff --git a/sword2/driver/d_draw.h b/sword2/driver/d_draw.h
index 50b4afb82a..4cc1fe927e 100644
--- a/sword2/driver/d_draw.h
+++ b/sword2/driver/d_draw.h
@@ -78,7 +78,7 @@ extern "C" {
 
 
 extern uint8 *lpPalette;			// palette
-extern Surface *lpBackBuffer;		// back surface
+extern byte *lpBackBuffer;		// back surface
 // extern Surface *lpPrimarySurface;	// DirectDraw front buffer.
 extern uint8 *lpDD2;				// DirectDraw2 object
 extern BOOL bFullScreen;		// Defines whether the app is running in full screen mode or not.