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

   1 /*
   2  * Copyright (c) 2020 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/devel-api/actors/actor-devel.h>
  24 #include <dali-toolkit/dali-toolkit.h>
  25 #include <dali-toolkit/devel-api/shader-effects/motion-stretch-effect.h>
  26
  27 using namespace Dali;
  28 using namespace Dali::Toolkit;
  29
  30
  31
  32 namespace // unnamed namespace
  33 {
  34
  35 ////////////////////////////////////////////////////
  36 //
  37 // Demo setup parameters
  38 //
  39
  40 const float MOTION_STRETCH_ACTOR_WIDTH = 256;                                          // actor size on screen
  41 const float MOTION_STRETCH_ACTOR_HEIGHT = 256;                                         // ""
  42
  43 const int MOTION_STRETCH_NUM_ACTOR_IMAGES = 5;
  44 const char* MOTION_STRETCH_ACTOR_IMAGE1( DEMO_IMAGE_DIR "image-with-border-1.jpg" );
  45 const char* MOTION_STRETCH_ACTOR_IMAGE2( DEMO_IMAGE_DIR "image-with-border-2.jpg" );
  46 const char* MOTION_STRETCH_ACTOR_IMAGE3( DEMO_IMAGE_DIR "image-with-border-3.jpg" );
  47 const char* MOTION_STRETCH_ACTOR_IMAGE4( DEMO_IMAGE_DIR "image-with-border-4.jpg" );
  48 const char* MOTION_STRETCH_ACTOR_IMAGE5( DEMO_IMAGE_DIR "image-with-border-5.jpg" );
  49
  50 const char* MOTION_STRETCH_ACTOR_IMAGES[] = {
  51   MOTION_STRETCH_ACTOR_IMAGE1,
  52   MOTION_STRETCH_ACTOR_IMAGE2,
  53   MOTION_STRETCH_ACTOR_IMAGE3,
  54   MOTION_STRETCH_ACTOR_IMAGE4,
  55   MOTION_STRETCH_ACTOR_IMAGE5,
  56 };
  57
  58 const int NUM_ACTOR_ANIMATIONS = 4;
  59 const int NUM_CAMERA_ANIMATIONS = 2;
  60
  61
  62 const char* BACKGROUND_IMAGE_PATH = DEMO_IMAGE_DIR "background-default.png";
  63
  64 const char* TOOLBAR_IMAGE( DEMO_IMAGE_DIR "top-bar.png" );
  65 const char* LAYOUT_IMAGE( DEMO_IMAGE_DIR "icon-change.png" );
  66 const char* LAYOUT_IMAGE_SELECTED( DEMO_IMAGE_DIR "icon-change-selected.png" );
  67 const char* APPLICATION_TITLE( "Motion Stretch" );
  68 const char* EFFECTS_OFF_ICON( DEMO_IMAGE_DIR "icon-effects-off.png" );
  69 const char* EFFECTS_OFF_ICON_SELECTED( DEMO_IMAGE_DIR "icon-effects-off-selected.png" );
  70 const char* EFFECTS_ON_ICON( DEMO_IMAGE_DIR "icon-effects-on.png" );
  71 const char* EFFECTS_ON_ICON_SELECTED( DEMO_IMAGE_DIR "icon-effects-on-selected.png" );
  72
  73 // These values depend on the button background image
  74 const Vector4 BUTTON_IMAGE_BORDER( Vector4::ONE * 3.0f );
  75
  76 const float UI_MARGIN = 4.0f;                              ///< Screen Margin for placement of UI buttons
  77
  78 const Vector3 BUTTON_SIZE_CONSTRAINT( 0.24f, 0.09f, 1.0f );
  79
  80 // move this button down a bit so it is visible on target and not covered up by toolbar
  81 const float BUTTON_TITLE_LABEL_Y_OFFSET = 0.05f;
  82
  83 const float ORIENTATION_DURATION = 0.5f;                  ///< Time to rotate to new orientation.
  84 } // unnamed namespace
  85
  86
  87
  88
  89 //
  90 class MotionStretchExampleApp : public ConnectionTracker
  91 {
  92 public:
  93
  94   /**
  95      * DeviceOrientation describes the four different
  96      * orientations the device can be in based on accelerometer reports.
  97      */
  98   enum DeviceOrientation
  99   {
 100     PORTRAIT = 0,
 101     LANDSCAPE = 90,
 102     PORTRAIT_INVERSE = 180,
 103     LANDSCAPE_INVERSE = 270
 104   };
 105
 106   /**
 107    * Constructor
 108    * @param application class, stored as reference
 109    */
 110   MotionStretchExampleApp(Application &app)
 111   : mApplication(app),
 112     mActorEffectsEnabled(false),
 113     mCurrentActorAnimation(0),
 114     mCurrentImage(0),
 115     mOrientation( PORTRAIT )
 116   {
 117     // Connect to the Application's Init signal
 118     app.InitSignal().Connect(this, &MotionStretchExampleApp::OnInit);
 119   }
 120
 121   ~MotionStretchExampleApp()
 122   {
 123     // Nothing to do here; everything gets deleted automatically
 124   }
 125
 126   /**
 127    * This method gets called once the main loop of application is up and running
 128    */
 129   void OnInit(Application& app)
 130   {
 131     // The Init signal is received once (only) during the Application lifetime
 132     Window window = app.GetWindow();
 133
 134     window.KeyEventSignal().Connect(this, &MotionStretchExampleApp::OnKeyEvent);
 135
 136     // Creates a default view with a default tool bar.
 137     // The view is added to the window.
 138     mContentLayer = DemoHelper::CreateView( mApplication,
 139                                             mView,
 140                                             mToolBar,
 141                                             BACKGROUND_IMAGE_PATH,
 142                                             TOOLBAR_IMAGE,
 143                                             APPLICATION_TITLE );
 144
 145     // Ensure the content layer is a square so the touch area works in all orientations
 146     Vector2 windowSize = window.GetSize();
 147     float size = std::max( windowSize.width, windowSize.height );
 148     mContentLayer.SetProperty( Actor::Property::SIZE, Vector2( size, size ) );
 149
 150     //Add an slideshow icon on the right of the title
 151     mActorEffectsButton = Toolkit::PushButton::New();
 152     mActorEffectsButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, EFFECTS_OFF_ICON );
 153     mActorEffectsButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, EFFECTS_OFF_ICON_SELECTED );
 154     mActorEffectsButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnEffectButtonClicked );
 155     mToolBar.AddControl( mActorEffectsButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HORIZONTAL_CENTER, DemoHelper::DEFAULT_PLAY_PADDING );
 156
 157     // Creates a mode button.
 158     // Create a effect toggle button. (right of toolbar)
 159     Toolkit::PushButton layoutButton = Toolkit::PushButton::New();
 160     layoutButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, LAYOUT_IMAGE );
 161     layoutButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, LAYOUT_IMAGE_SELECTED );
 162     layoutButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnLayoutButtonClicked);
 163     layoutButton.SetProperty( Actor::Property::LEAVE_REQUIRED, true );
 164     mToolBar.AddControl( layoutButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HORIZONTAL_RIGHT, DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
 165
 166     // Input
 167     mTapGestureDetector = TapGestureDetector::New();
 168     mTapGestureDetector.Attach( mContentLayer );
 169     mTapGestureDetector.DetectedSignal().Connect( this, &MotionStretchExampleApp::OnTap );
 170
 171     // set initial orientation
 172     Dali::Window winHandle = app.GetWindow();
 173     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT );
 174     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE );
 175     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT_INVERSE  );
 176     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE_INVERSE );
 177     winHandle.ResizeSignal().Connect( this, &MotionStretchExampleApp::OnWindowResized );
 178
 179     // set initial orientation
 180     Rotate( PORTRAIT );
 181
 182     ///////////////////////////////////////////////////////
 183     //
 184     // Motion stretched actor
 185     //
 186     mMotionStretchEffect = Toolkit::CreateMotionStretchEffect();
 187     mMotionStretchEffect["url"] = MOTION_STRETCH_ACTOR_IMAGE1;
 188     mMotionStretchImageView = ImageView::New();
 189     mMotionStretchImageView.SetProperty( Toolkit::ImageView::Property::IMAGE, mMotionStretchEffect );
 190     mMotionStretchImageView.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER );
 191     mMotionStretchImageView.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER );
 192     mMotionStretchImageView.SetProperty( Actor::Property::SIZE, Vector2( MOTION_STRETCH_ACTOR_WIDTH, MOTION_STRETCH_ACTOR_HEIGHT ) );
 193     // Add stretch padding
 194     mMotionStretchImageView.SetProperty( DevelActor::Property::UPDATE_SIZE_HINT, Vector2( MOTION_STRETCH_ACTOR_WIDTH+32, MOTION_STRETCH_ACTOR_HEIGHT+32 ) );
 195
 196     mContentLayer.Add( mMotionStretchImageView );
 197
 198     // Create shader used for doing motion stretch
 199     Toolkit::SetMotionStretchProperties( mMotionStretchImageView );
 200   }
 201
 202   //////////////////////////////////////////////////////////////
 203   //
 204   // Device Orientation Support
 205   //
 206   //
 207
 208   void OnWindowResized( Window window, Window::WindowSize size )
 209   {
 210     Rotate( size.GetWidth() > size.GetHeight() ? LANDSCAPE : PORTRAIT );
 211   }
 212
 213   void Rotate( DeviceOrientation orientation )
 214   {
 215     // Resize the root actor
 216     const Vector2 targetSize = mApplication.GetWindow().GetSize();
 217
 218     if( mOrientation != orientation )
 219     {
 220       mOrientation = orientation;
 221
 222       // check if actor is on window
 223       if( mView.GetParent() )
 224       {
 225         // has parent so we expect it to be on window, start animation
 226         mRotateAnimation = Animation::New( ORIENTATION_DURATION );
 227         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_WIDTH ), targetSize.width );
 228         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_HEIGHT ), targetSize.height );
 229         mRotateAnimation.Play();
 230       }
 231       else
 232       {
 233         mView.SetProperty( Actor::Property::SIZE, targetSize );
 234       }
 235     }
 236     else
 237     {
 238       // for first time just set size
 239       mView.SetProperty( Actor::Property::SIZE, targetSize );
 240     }
 241   }
 242
 243   //////////////////////////////////////////////////////////////
 244   //
 245   // Actor Animation
 246   //
 247   //
 248
 249   // move to point on screen that was tapped
 250   void OnTap( Actor actor, const TapGesture& tapGesture )
 251   {
 252     Vector3 destPos;
 253     float originOffsetX, originOffsetY;
 254
 255     // rotate offset (from top left origin to centre) into actor space
 256     Vector2 windowSize = mApplication.GetWindow().GetSize();
 257     actor.ScreenToLocal(originOffsetX, originOffsetY, windowSize.width * 0.5f, windowSize.height * 0.5f);
 258
 259     // get dest point in local actor space
 260     const Vector2& localPoint = tapGesture.GetLocalPoint();
 261     destPos.x = localPoint.x - originOffsetX;
 262     destPos.y = 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.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, EFFECTS_ON_ICON );
 343       mActorEffectsButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, EFFECTS_ON_ICON_SELECTED );
 344     }
 345     else
 346     {
 347       mActorEffectsEnabled = false;
 348       mActorEffectsButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, EFFECTS_OFF_ICON );
 349       mActorEffectsButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, 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.GetState() == 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     mMotionStretchEffect["url"] = MOTION_STRETCH_ACTOR_IMAGES[mCurrentImage];
 401     mMotionStretchImageView.SetProperty( Toolkit::ImageView::Property::IMAGE, mMotionStretchEffect );
 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 int DALI_EXPORT_API main(int argc, char **argv)
 436 {
 437   Application app = Application::New(&argc, &argv, DEMO_THEME_PATH);
 438   MotionStretchExampleApp test(app);
 439   app.MainLoop();
 440   return 0;
 441 }