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