examples/motion-stretch/motion-stretch-example.cpp

   1 /*
   2  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 #include <sstream>
  19 #include <iomanip>
  20
  21 #include "shared/view.h"
  22 #include <dali/dali.h>
  23 #include <dali-toolkit/dali-toolkit.h>
  24
  25 using namespace Dali;
  26 using namespace Dali::Toolkit;
  27
  28
  29
  30 namespace // unnamed namespace
  31 {
  32
  33 ////////////////////////////////////////////////////
  34 //
  35 // Demo setup parameters
  36 //
  37
  38 const float MOTION_STRETCH_ACTOR_WIDTH = 256;                                          // actor size on screen
  39 const float MOTION_STRETCH_ACTOR_HEIGHT = 256;                                         // ""
  40
  41 const int MOTION_STRETCH_NUM_ACTOR_IMAGES = 5;
  42 const char* MOTION_STRETCH_ACTOR_IMAGE1( DALI_IMAGE_DIR "image-with-border-1.jpg" );
  43 const char* MOTION_STRETCH_ACTOR_IMAGE2( DALI_IMAGE_DIR "image-with-border-2.jpg" );
  44 const char* MOTION_STRETCH_ACTOR_IMAGE3( DALI_IMAGE_DIR "image-with-border-3.jpg" );
  45 const char* MOTION_STRETCH_ACTOR_IMAGE4( DALI_IMAGE_DIR "image-with-border-4.jpg" );
  46 const char* MOTION_STRETCH_ACTOR_IMAGE5( DALI_IMAGE_DIR "image-with-border-5.jpg" );
  47
  48 const char* MOTION_STRETCH_ACTOR_IMAGES[] = {
  49   MOTION_STRETCH_ACTOR_IMAGE1,
  50   MOTION_STRETCH_ACTOR_IMAGE2,
  51   MOTION_STRETCH_ACTOR_IMAGE3,
  52   MOTION_STRETCH_ACTOR_IMAGE4,
  53   MOTION_STRETCH_ACTOR_IMAGE5,
  54 };
  55
  56 const int NUM_ACTOR_ANIMATIONS = 4;
  57 const int NUM_CAMERA_ANIMATIONS = 2;
  58
  59
  60 const char* BACKGROUND_IMAGE_PATH = DALI_IMAGE_DIR "background-default.png";
  61
  62 const char* TOOLBAR_IMAGE( DALI_IMAGE_DIR "top-bar.png" );
  63 const char* LAYOUT_IMAGE( DALI_IMAGE_DIR "icon-change.png" );
  64 const char* APPLICATION_TITLE( "Motion Stretch" );
  65 const char* EFFECTS_OFF_ICON( DALI_IMAGE_DIR "icon-effects-off.png" );
  66 const char* EFFECTS_ON_ICON( DALI_IMAGE_DIR "icon-effects-on.png" );
  67
  68 // These values depend on the button background image
  69 const Vector4 BUTTON_IMAGE_BORDER( Vector4::ONE * 3.0f );
  70
  71 const float UI_MARGIN = 4.0f;                              ///< Screen Margin for placement of UI buttons
  72
  73 const Vector3 BUTTON_SIZE_CONSTRAINT( 0.24f, 0.09f, 1.0f );
  74
  75 // move this button down a bit so it is visible on target and not covered up by toolbar
  76 const float BUTTON_TITLE_LABEL_Y_OFFSET = 0.05f;
  77
  78 const float ORIENTATION_DURATION = 0.5f;                  ///< Time to rotate to new orientation.
  79 } // unnamed namespace
  80
  81
  82
  83
  84 //
  85 class MotionStretchExampleApp : public ConnectionTracker
  86 {
  87 public:
  88
  89   /**
  90      * DeviceOrientation describes the four different
  91      * orientations the device can be in based on accelerometer reports.
  92      */
  93   enum DeviceOrientation
  94   {
  95     PORTRAIT = 0,
  96     LANDSCAPE = 90,
  97     PORTRAIT_INVERSE = 180,
  98     LANDSCAPE_INVERSE = 270
  99   };
 100
 101   /**
 102    * Constructor
 103    * @param application class, stored as reference
 104    */
 105   MotionStretchExampleApp(Application &app)
 106   : mApplication(app),
 107     mActorEffectsEnabled(false),
 108     mCurrentActorAnimation(0),
 109     mCurrentImage(0)
 110   {
 111     // Connect to the Application's Init signal
 112     app.InitSignal().Connect(this, &MotionStretchExampleApp::OnInit);
 113   }
 114
 115   ~MotionStretchExampleApp()
 116   {
 117     // Nothing to do here; everything gets deleted automatically
 118   }
 119
 120   /**
 121    * This method gets called once the main loop of application is up and running
 122    */
 123   void OnInit(Application& app)
 124   {
 125     // The Init signal is received once (only) during the Application lifetime
 126
 127     DemoHelper::RequestThemeChange();
 128
 129     Stage::GetCurrent().KeyEventSignal().Connect(this, &MotionStretchExampleApp::OnKeyEvent);
 130
 131     // Creates a default view with a default tool bar.
 132     // The view is added to the stage.
 133     mContentLayer = DemoHelper::CreateView( mApplication,
 134                                             mView,
 135                                             mToolBar,
 136                                             BACKGROUND_IMAGE_PATH,
 137                                             TOOLBAR_IMAGE,
 138                                             APPLICATION_TITLE );
 139
 140     //Add an slideshow icon on the right of the title
 141     mIconEffectsOff = ResourceImage::New( EFFECTS_OFF_ICON );
 142     mIconEffectsOn = ResourceImage::New( EFFECTS_ON_ICON );
 143     mActorEffectsButton = Toolkit::PushButton::New();
 144     mActorEffectsButton.SetBackgroundImage( mIconEffectsOff );
 145     mActorEffectsButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnEffectButtonClicked );
 146     mToolBar.AddControl( mActorEffectsButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalCenter, DemoHelper::DEFAULT_PLAY_PADDING );
 147
 148     // Creates a mode button.
 149     // Create a effect toggle button. (right of toolbar)
 150     Image imageLayout = ResourceImage::New( LAYOUT_IMAGE );
 151     Toolkit::PushButton layoutButton = Toolkit::PushButton::New();
 152     layoutButton.SetBackgroundImage(imageLayout);
 153     layoutButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnLayoutButtonClicked);
 154     layoutButton.SetLeaveRequired( true );
 155     mToolBar.AddControl( layoutButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalRight, DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
 156
 157     // Input
 158     mTapGestureDetector = TapGestureDetector::New();
 159     mTapGestureDetector.Attach( mContentLayer );
 160     mTapGestureDetector.DetectedSignal().Connect( this, &MotionStretchExampleApp::OnTap );
 161
 162     // set initial orientation
 163     Dali::Window winHandle = app.GetWindow();
 164     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT );
 165     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE );
 166     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT_INVERSE  );
 167     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE_INVERSE );
 168
 169     winHandle.GetOrientation().ChangedSignal().Connect( this, &MotionStretchExampleApp::OnOrientationChanged );
 170     unsigned int degrees = winHandle.GetOrientation().GetDegrees();
 171     Rotate( static_cast< DeviceOrientation >( degrees ) );
 172
 173
 174     ///////////////////////////////////////////////////////
 175     //
 176     // Motion stretched actor
 177     //
 178
 179     Image image = ResourceImage::New( MOTION_STRETCH_ACTOR_IMAGE1 );
 180     mMotionStretchImageActor = ImageActor::New(image);
 181     mMotionStretchImageActor.SetParentOrigin( ParentOrigin::CENTER );
 182     mMotionStretchImageActor.SetAnchorPoint( AnchorPoint::CENTER );
 183     mMotionStretchImageActor.SetSize(MOTION_STRETCH_ACTOR_WIDTH, MOTION_STRETCH_ACTOR_HEIGHT);
 184
 185     mContentLayer.Add( mMotionStretchImageActor );
 186
 187     // Create shader used for doing motion stretch
 188     mMotionStretchEffect = Toolkit::CreateMotionStretchEffect();
 189     Dali::Property::Index uModelProperty = mMotionStretchEffect.GetPropertyIndex( "uModelLastFrame" );
 190     Constraint constraint = Constraint::New<Matrix>( mMotionStretchEffect, uModelProperty, EqualToConstraint() );
 191     constraint.AddSource( Source( mMotionStretchImageActor , Actor::Property::WORLD_MATRIX ) );
 192     constraint.Apply();
 193     mMotionStretchImageActor.SetShaderEffect( mMotionStretchEffect );
 194   }
 195
 196   //////////////////////////////////////////////////////////////
 197   //
 198   // Device Orientation Support
 199   //
 200   //
 201
 202   void OnOrientationChanged( Orientation orientation )
 203   {
 204     unsigned int degrees = orientation.GetDegrees();
 205     Rotate( static_cast< DeviceOrientation >( degrees ) );
 206   }
 207
 208   void Rotate( DeviceOrientation orientation )
 209   {
 210     // Resize the root actor
 211     Vector2 stageSize = Stage::GetCurrent().GetSize();
 212     Vector2 targetSize = stageSize;
 213     if( orientation == LANDSCAPE ||
 214         orientation == LANDSCAPE_INVERSE )
 215     {
 216       targetSize = Vector2( stageSize.y, stageSize.x );
 217     }
 218
 219     if( mOrientation != orientation )
 220     {
 221       mOrientation = orientation;
 222
 223       // check if actor is on stage
 224       if( mView.GetParent() )
 225       {
 226         // has parent so we expect it to be on stage, start animation
 227         mRotateAnimation = Animation::New( ORIENTATION_DURATION );
 228         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree( -orientation ) ), Vector3::ZAXIS ), AlphaFunction::EASE_OUT );
 229         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_WIDTH ), targetSize.width );
 230         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_HEIGHT ), targetSize.height );
 231         mRotateAnimation.Play();
 232       }
 233       else
 234       {
 235         // set the rotation to match the orientation
 236         mView.SetOrientation( Degree( -orientation ), Vector3::ZAXIS );
 237         mView.SetSize( targetSize );
 238       }
 239     }
 240     else
 241     {
 242       // for first time just set size
 243       mView.SetSize( targetSize );
 244     }
 245   }
 246
 247   //////////////////////////////////////////////////////////////
 248   //
 249   // Actor Animation
 250   //
 251   //
 252
 253   // move to point on screen that was tapped
 254   void OnTap( Actor actor, const TapGesture& tapGesture )
 255   {
 256     Vector3 destPos;
 257     float originOffsetX, originOffsetY;
 258
 259     // rotate offset (from top left origin to centre) into actor space
 260     Vector2 stageSize = Dali::Stage::GetCurrent().GetSize();
 261     actor.ScreenToLocal(originOffsetX, originOffsetY, stageSize.width * 0.5f, stageSize.height * 0.5f);
 262
 263     // get dest point in local actor space
 264     destPos.x = tapGesture.localPoint.x - originOffsetX;
 265     destPos.y = tapGesture.localPoint.y - originOffsetY;
 266     destPos.z = 0.0f;
 267
 268     float animDuration = 0.5f;
 269     mActorTapMovementAnimation = Animation::New( animDuration );
 270     if ( mMotionStretchImageActor )
 271     {
 272       mActorTapMovementAnimation.AnimateTo( Property(mMotionStretchImageActor, Actor::Property::POSITION), destPos, AlphaFunction::EASE_IN_OUT_SINE, TimePeriod(animDuration) );
 273     }
 274     mActorTapMovementAnimation.SetEndAction( Animation::Bake );
 275     mActorTapMovementAnimation.Play();
 276
 277
 278     // perform some spinning etc
 279     if(mActorEffectsEnabled)
 280     {
 281       switch(mCurrentActorAnimation)
 282       {
 283         // spin around y
 284         case 0:
 285         {
 286           float animDuration = 1.0f;
 287           mActorAnimation = Animation::New(animDuration);
 288           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::YAXIS ), AlphaFunction::EASE_IN_OUT );
 289           mActorAnimation.SetEndAction( Animation::Bake );
 290           mActorAnimation.Play();
 291         }
 292         break;
 293
 294         // spin around z
 295         case 1:
 296         {
 297           float animDuration = 1.0f;
 298           mActorAnimation = Animation::New(animDuration);
 299           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 300           mActorAnimation.SetEndAction( Animation::Bake );
 301           mActorAnimation.Play();
 302         }
 303         break;
 304
 305         // spin around y and z
 306         case 2:
 307         {
 308           float animDuration = 1.0f;
 309           mActorAnimation = Animation::New(animDuration);
 310           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::YAXIS ), AlphaFunction::EASE_IN_OUT );
 311           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 312           mActorAnimation.SetEndAction( Animation::Bake );
 313           mActorAnimation.Play();
 314         }
 315         break;
 316
 317         // scale
 318         case 3:
 319         {
 320           float animDuration = 1.0f;
 321           mActorAnimation = Animation::New(animDuration);
 322           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::SCALE ), Vector3(2.0f, 2.0f, 2.0f), AlphaFunction::BOUNCE, TimePeriod( 0.0f, 1.0f ) );
 323           mActorAnimation.SetEndAction( Animation::Bake );
 324           mActorAnimation.Play();
 325         }
 326         break;
 327
 328         default:
 329           break;
 330       }
 331
 332       mCurrentActorAnimation++;
 333       if(NUM_ACTOR_ANIMATIONS == mCurrentActorAnimation)
 334       {
 335         mCurrentActorAnimation = 0;
 336       }
 337     }
 338   }
 339
 340   void ToggleActorEffects()
 341   {
 342     if(!mActorEffectsEnabled)
 343     {
 344       mActorEffectsEnabled = true;
 345       mActorEffectsButton.SetBackgroundImage( mIconEffectsOn );
 346     }
 347     else
 348     {
 349       mActorEffectsEnabled = false;
 350       mActorEffectsButton.SetBackgroundImage( mIconEffectsOff );
 351     }
 352   }
 353
 354   //////////////////////////////////////////////////////////////
 355   //
 356   // Input handlers
 357   //
 358   //
 359
 360   bool OnLayoutButtonClicked( Toolkit::Button button )
 361   {
 362     ChangeImage();
 363     return true;
 364   }
 365
 366   bool OnEffectButtonClicked( Toolkit::Button button )
 367   {
 368     ToggleActorEffects();
 369     return true;
 370   }
 371
 372   /**
 373    * Main key event handler
 374    */
 375   void OnKeyEvent(const KeyEvent& event)
 376   {
 377     if(event.state == KeyEvent::Down)
 378     {
 379       if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 380       {
 381         mApplication.Quit();
 382       }
 383     }
 384   }
 385
 386   //////////////////////////////////////////////////////////////
 387   //
 388   // Misc
 389   //
 390   //
 391
 392
 393   void ChangeImage()
 394   {
 395     mCurrentImage++;
 396     if(MOTION_STRETCH_NUM_ACTOR_IMAGES == mCurrentImage)
 397     {
 398       mCurrentImage = 0;
 399     }
 400
 401     Image stretchImage = ResourceImage::New( MOTION_STRETCH_ACTOR_IMAGES[mCurrentImage] );
 402     mMotionStretchImageActor.SetImage(stretchImage);
 403   }
 404
 405
 406 private:
 407   Application&               mApplication;            ///< Application instance
 408   Toolkit::Control           mView;
 409   Toolkit::ToolBar           mToolBar;
 410   Image                      mIconEffectsOff;
 411   Image                      mIconEffectsOn;
 412   Layer                      mContentLayer;           ///< Content layer (contains actor for this stretch demo)
 413
 414   PushButton                 mActorEffectsButton;     ///< The actor effects toggling Button.
 415
 416   // Motion stretch
 417   ShaderEffect mMotionStretchEffect;
 418   ImageActor mMotionStretchImageActor;
 419
 420   // animate actor to position where user taps screen
 421   Animation mActorTapMovementAnimation;
 422
 423   // show different animations to demonstrate stretch effect working on an object only movement basis
 424   bool mActorEffectsEnabled;
 425   Animation mActorAnimation;
 426   int mCurrentActorAnimation;
 427
 428   // offer a selection of images that user can cycle between
 429   int mCurrentImage;
 430
 431   TapGestureDetector mTapGestureDetector;
 432
 433   DeviceOrientation mOrientation;               ///< Current Device orientation
 434   Animation mRotateAnimation;                   ///< Animation for rotating between landscape and portrait.
 435
 436 };
 437
 438 void RunTest(Application& app)
 439 {
 440   MotionStretchExampleApp test(app);
 441
 442   app.MainLoop();
 443 }
 444
 445 // Entry point for Linux & Tizen applications
 446 //
 447 int main(int argc, char **argv)
 448 {
 449   Application app = Application::New(&argc, &argv);
 450
 451   RunTest(app);
 452
 453   return 0;
 454 }