Imported Upstream version 0.26.0

libs/openengine/ogre/fader.hpp

@@ -0,0 +1,59 @@
+#ifndef OENGINE_OGRE_FADE_H
+#define OENGINE_OGRE_FADE_H
+
+/*
+  A class that handles fading in the screen from black or fading it out to black.
+  
+  To achieve this, it uses a full-screen Rectangle2d
+ */
+ 
+namespace Ogre
+{
+    class TextureUnitState;
+    class Rectangle2D;
+    class SceneManager;
+}
+
+namespace OEngine {
+namespace Render
+{
+    class Fader
+    {
+    public:
+        Fader(Ogre::SceneManager* sceneMgr);
+        ~Fader();
+
+        void update(float dt);
+
+        void fadeIn(const float time);
+        void fadeOut(const float time);
+        void fadeTo(const int percent, const float time);
+
+        void setFactor (float factor) { mFactor = factor; }
+
+    private:
+        enum FadingMode
+        {
+            FadingMode_In,
+            FadingMode_Out
+        };
+
+        void applyAlpha();
+
+        Ogre::TextureUnitState* mFadeTextureUnit;
+        Ogre::Rectangle2D* mRectangle;
+
+        FadingMode mMode;
+
+        float mRemainingTime;
+        float mTargetTime;
+        float mTargetAlpha;
+        float mCurrentAlpha;
+        float mStartAlpha;
+
+        float mFactor;
+
+        Ogre::SceneManager* mSceneMgr;
+    };
+    }}
+#endif