From ef37d0a9b05607141558ba358a7dfd361aa26d9e Mon Sep 17 00:00:00 2001
From: Denis Kasak
Date: Wed, 22 Jul 2009 07:18:00 +0000
Subject: * Stopped AnimationManager::drawScene() from marking its own
 dirtiness. * Instead, Animation::nextFrame() marks both the old and the new
 frame dirty. This makes it possible to only update the real screen when the
 animation changes and results in a pretty big speedup. * Added utility method
 Animation::markDirtyRect() which takes a (Surface *) and marks a dirty rect
 on it for the current frame. * Fixed artifacts when moving the dragon.

svn-id: r42652
---
 engines/draci/game.cpp | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

(limited to 'engines/draci/game.cpp')

diff --git a/engines/draci/game.cpp b/engines/draci/game.cpp
index c01e544986..360375f0b8 100644
--- a/engines/draci/game.cpp
+++ b/engines/draci/game.cpp
@@ -181,7 +181,22 @@ void Game::loop() {
 			double scaleX = _currentRoom._pers0 + _currentRoom._persStep * y;
 			double scaleY = scaleX;
 
-			Drawable *frame;
+			// Set the Z coordinate for the dragon's animation
+			anim->setZ(y+1);
+
+			// Fetch current frame
+			Drawable *frame = anim->getFrame();
+
+			// Fetch base height of the frame
+			uint height = frame->getHeight();
+
+			// We naturally want the dragon to position its feet to the location of the
+			// click but sprites are drawn from their top-left corner so we subtract
+			// the current height of the dragon's sprite
+			// We also need to do this before we change the frames' scaled dimensions
+			// so setRelative() can correctly delete the old frame
+			y -= scaleY * height;
+			anim->setRelative(x, y);
 
 			// Set the scaled dimensions for all frames
 			for (uint i = 0; i < anim->getFramesNum(); ++i) {
@@ -194,15 +209,6 @@ void Game::loop() {
 				frame->setScaled(scaledWidth, scaledHeight);
 			}
 
-			// Set the Z coordinate for the dragon's animation
-			anim->setZ(y+1);
-
-			// We naturally want the dragon to position its feet to the location of the
-			// click but sprites are drawn from their top-left corner so we subtract
-			// the current height of the dragon's sprite
-			y -= frame->getScaledHeight();
-			anim->setRelative(x, y);
-
 			// Play the animation
 			_vm->_anims->play(animID);
 
-- 
cgit v1.2.3