Fix for coverity #29401

[supertux.git] / src / object / floating_image.cpp

diff --git a/src/object/floating_image.cpp b/src/object/floating_image.cpp
index 5798784..1bb0fe2 100644 (file)
--- a/src/object/floating_image.cpp
+++ b/src/object/floating_image.cpp
@@ -1,12 +1,10 @@
-//  $Id$
-//
 //  SuperTux
 //  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
 //
-//  This program is free software; you can redistribute it and/or
-//  modify it under the terms of the GNU General Public License
-//  as published by the Free Software Foundation; either version 2
-//  of the License, or (at your option) any later version.
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
 //
 //  This program is distributed in the hope that it will be useful,
 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -14,25 +12,22 @@
 //  GNU General Public License for more details.
 //
 //  You should have received a copy of the GNU General Public License
-//  along with this program; if not, write to the Free Software
-//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
-
-#include <config.h>
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-#include <stdexcept>
-#include "resources.hpp"
-#include "main.hpp"
-#include "math/rect.hpp"
-#include "sprite/sprite_manager.hpp"
+#include "object/floating_image.hpp"
 #include "sprite/sprite.hpp"
-#include "video/drawing_context.hpp"
-#include "lisp/lisp.hpp"
-#include "floating_image.hpp"
+#include "sprite/sprite_manager.hpp"
+#include "supertux/globals.hpp"
 
-FloatingImage::FloatingImage(const std::string& spritefile)
-  : layer(LAYER_FOREGROUND1 + 1), visible(false), anchor(ANCHOR_MIDDLE)
+FloatingImage::FloatingImage(const std::string& spritefile) :
+  sprite(SpriteManager::current()->create(spritefile)),
+  layer(LAYER_FOREGROUND1 + 1),
+  visible(false),
+  anchor(ANCHOR_MIDDLE),
+  pos(),
+  fading(0),
+  fadetime(0)
 {
-  sprite.reset(sprite_manager->create(spritefile));
 }
 
 FloatingImage::~FloatingImage()
@@ -42,7 +37,21 @@ FloatingImage::~FloatingImage()
 void
 FloatingImage::update(float elapsed_time)
 {
-  (void) elapsed_time;
+  if(fading > 0) {
+    fading -= elapsed_time;
+    if(fading <= 0) {
+      fading = 0;
+      visible = true;
+    }
+  } else if(fading < 0) {
+    fading += elapsed_time;
+    if(fading >= 0) {
+      fading = 0;
+      visible = false;
+    }
+  }
+
+  //  (void) elapsed_time;
 }
 
 void
@@ -58,18 +67,40 @@ FloatingImage::get_action()
 }
 
 void
-FloatingImage::draw(DrawingContext& context)
+FloatingImage::fade_in(float fadetime_)
 {
-  if(!visible)
-    return;
+  this->fadetime = fadetime_;
+  fading = fadetime_;
+}
+
+void
+FloatingImage::fade_out(float fadetime_)
+{
+  this->fadetime = fadetime_;
+  fading = -fadetime_;
+}
 
+void
+FloatingImage::draw(DrawingContext& context)
+{
   context.push_transform();
   context.set_translation(Vector(0, 0));
 
-  Vector spos = pos + get_anchor_pos(Rect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT),
-      sprite->get_width(), sprite->get_height(), anchor);
+  if(fading > 0) {
+    context.set_alpha((fadetime-fading) / fadetime);
+  } else if(fading < 0) {
+    context.set_alpha(-fading / fadetime);
+  } else if(!visible) {
+    context.pop_transform();
+    return;
+  }
+
+  Vector spos = pos + get_anchor_pos(Rectf(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT),
+                                     sprite->get_width(), sprite->get_height(), anchor);
 
   sprite->draw(context, spos, layer);
 
   context.pop_transform();
 }
+
+/* EOF */