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

   1 /*
   2  * Copyright (c) 2019 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     mOrientation( PORTRAIT )
 115   {
 116     // Connect to the Application's Init signal
 117     app.InitSignal().Connect(this, &MotionStretchExampleApp::OnInit);
 118   }
 119
 120   ~MotionStretchExampleApp()
 121   {
 122     // Nothing to do here; everything gets deleted automatically
 123   }
 124
 125   /**
 126    * This method gets called once the main loop of application is up and running
 127    */
 128   void OnInit(Application& app)
 129   {
 130     // The Init signal is received once (only) during the Application lifetime
 131
 132     Stage::GetCurrent().KeyEventSignal().Connect(this, &MotionStretchExampleApp::OnKeyEvent);
 133
 134     // Creates a default view with a default tool bar.
 135     // The view is added to the stage.
 136     mContentLayer = DemoHelper::CreateView( mApplication,
 137                                             mView,
 138                                             mToolBar,
 139                                             BACKGROUND_IMAGE_PATH,
 140                                             TOOLBAR_IMAGE,
 141                                             APPLICATION_TITLE );
 142
 143     // Ensure the content layer is a square so the touch area works in all orientations
 144     Vector2 stageSize = Stage::GetCurrent().GetSize();
 145     float size = std::max( stageSize.width, stageSize.height );
 146     mContentLayer.SetProperty( Actor::Property::SIZE, Vector2( size, size ) );
 147
 148     //Add an slideshow icon on the right of the title
 149     mActorEffectsButton = Toolkit::PushButton::New();
 150     mActorEffectsButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, EFFECTS_OFF_ICON );
 151     mActorEffectsButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, EFFECTS_OFF_ICON_SELECTED );
 152     mActorEffectsButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnEffectButtonClicked );
 153     mToolBar.AddControl( mActorEffectsButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalCenter, DemoHelper::DEFAULT_PLAY_PADDING );
 154
 155     // Creates a mode button.
 156     // Create a effect toggle button. (right of toolbar)
 157     Toolkit::PushButton layoutButton = Toolkit::PushButton::New();
 158     layoutButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, LAYOUT_IMAGE );
 159     layoutButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, LAYOUT_IMAGE_SELECTED );
 160     layoutButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnLayoutButtonClicked);
 161     layoutButton.SetProperty( Actor::Property::LEAVE_REQUIRED, true );
 162     mToolBar.AddControl( layoutButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalRight, DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
 163
 164     // Input
 165     mTapGestureDetector = TapGestureDetector::New();
 166     mTapGestureDetector.Attach( mContentLayer );
 167     mTapGestureDetector.DetectedSignal().Connect( this, &MotionStretchExampleApp::OnTap );
 168
 169     // set initial orientation
 170     Dali::Window winHandle = app.GetWindow();
 171     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT );
 172     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE );
 173     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT_INVERSE  );
 174     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE_INVERSE );
 175     winHandle.ResizedSignal().Connect( this, &MotionStretchExampleApp::OnWindowResized );
 176
 177     // set initial orientation
 178     Rotate( PORTRAIT );
 179
 180     ///////////////////////////////////////////////////////
 181     //
 182     // Motion stretched actor
 183     //
 184     mMotionStretchEffect = Toolkit::CreateMotionStretchEffect();
 185     mMotionStretchEffect["url"] = MOTION_STRETCH_ACTOR_IMAGE1;
 186     mMotionStretchImageView = ImageView::New();
 187     mMotionStretchImageView.SetProperty( Toolkit::ImageView::Property::IMAGE, mMotionStretchEffect );
 188     mMotionStretchImageView.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER );
 189     mMotionStretchImageView.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER );
 190     mMotionStretchImageView.SetProperty( Actor::Property::SIZE, Vector2( MOTION_STRETCH_ACTOR_WIDTH, MOTION_STRETCH_ACTOR_HEIGHT ) );
 191
 192     mContentLayer.Add( mMotionStretchImageView );
 193
 194     // Create shader used for doing motion stretch
 195     Toolkit::SetMotionStretchProperties( mMotionStretchImageView );
 196   }
 197
 198   //////////////////////////////////////////////////////////////
 199   //
 200   // Device Orientation Support
 201   //
 202   //
 203
 204   void OnWindowResized( Window::WindowSize size )
 205   {
 206     Rotate( size.GetWidth() > size.GetHeight() ? LANDSCAPE : PORTRAIT );
 207   }
 208
 209   void Rotate( DeviceOrientation orientation )
 210   {
 211     // Resize the root actor
 212     const Vector2 targetSize = Stage::GetCurrent().GetSize();
 213
 214     if( mOrientation != orientation )
 215     {
 216       mOrientation = orientation;
 217
 218       // check if actor is on stage
 219       if( mView.GetParent() )
 220       {
 221         // has parent so we expect it to be on stage, start animation
 222         mRotateAnimation = Animation::New( ORIENTATION_DURATION );
 223         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_WIDTH ), targetSize.width );
 224         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_HEIGHT ), targetSize.height );
 225         mRotateAnimation.Play();
 226       }
 227       else
 228       {
 229         mView.SetProperty( Actor::Property::SIZE, targetSize );
 230       }
 231     }
 232     else
 233     {
 234       // for first time just set size
 235       mView.SetProperty( Actor::Property::SIZE, targetSize );
 236     }
 237   }
 238
 239   //////////////////////////////////////////////////////////////
 240   //
 241   // Actor Animation
 242   //
 243   //
 244
 245   // move to point on screen that was tapped
 246   void OnTap( Actor actor, const TapGesture& tapGesture )
 247   {
 248     Vector3 destPos;
 249     float originOffsetX, originOffsetY;
 250
 251     // rotate offset (from top left origin to centre) into actor space
 252     Vector2 stageSize = Dali::Stage::GetCurrent().GetSize();
 253     actor.ScreenToLocal(originOffsetX, originOffsetY, stageSize.width * 0.5f, stageSize.height * 0.5f);
 254
 255     // get dest point in local actor space
 256     destPos.x = tapGesture.localPoint.x - originOffsetX;
 257     destPos.y = tapGesture.localPoint.y - originOffsetY;
 258     destPos.z = 0.0f;
 259
 260     float animDuration = 0.5f;
 261     mActorTapMovementAnimation = Animation::New( animDuration );
 262     if ( mMotionStretchImageView )
 263     {
 264       mActorTapMovementAnimation.AnimateTo( Property(mMotionStretchImageView, Actor::Property::POSITION), destPos, AlphaFunction::EASE_IN_OUT_SINE, TimePeriod(animDuration) );
 265     }
 266     mActorTapMovementAnimation.SetEndAction( Animation::Bake );
 267     mActorTapMovementAnimation.Play();
 268
 269
 270     // perform some spinning etc
 271     if(mActorEffectsEnabled)
 272     {
 273       switch(mCurrentActorAnimation)
 274       {
 275         // spin around y
 276         case 0:
 277         {
 278           float animDuration = 1.0f;
 279           mActorAnimation = Animation::New(animDuration);
 280           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::YAXIS ), AlphaFunction::EASE_IN_OUT );
 281           mActorAnimation.SetEndAction( Animation::Bake );
 282           mActorAnimation.Play();
 283         }
 284         break;
 285
 286         // spin around z
 287         case 1:
 288         {
 289           float animDuration = 1.0f;
 290           mActorAnimation = Animation::New(animDuration);
 291           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 292           mActorAnimation.SetEndAction( Animation::Bake );
 293           mActorAnimation.Play();
 294         }
 295         break;
 296
 297         // spin around y and z
 298         case 2:
 299         {
 300           float animDuration = 1.0f;
 301           mActorAnimation = Animation::New(animDuration);
 302           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::YAXIS ), AlphaFunction::EASE_IN_OUT );
 303           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 304           mActorAnimation.SetEndAction( Animation::Bake );
 305           mActorAnimation.Play();
 306         }
 307         break;
 308
 309         // scale
 310         case 3:
 311         {
 312           float animDuration = 1.0f;
 313           mActorAnimation = Animation::New(animDuration);
 314           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::SCALE ), Vector3(2.0f, 2.0f, 2.0f), AlphaFunction::BOUNCE, TimePeriod( 0.0f, 1.0f ) );
 315           mActorAnimation.SetEndAction( Animation::Bake );
 316           mActorAnimation.Play();
 317         }
 318         break;
 319
 320         default:
 321           break;
 322       }
 323
 324       mCurrentActorAnimation++;
 325       if(NUM_ACTOR_ANIMATIONS == mCurrentActorAnimation)
 326       {
 327         mCurrentActorAnimation = 0;
 328       }
 329     }
 330   }
 331
 332   void ToggleActorEffects()
 333   {
 334     if(!mActorEffectsEnabled)
 335     {
 336       mActorEffectsEnabled = true;
 337       mActorEffectsButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, EFFECTS_ON_ICON );
 338       mActorEffectsButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, EFFECTS_ON_ICON_SELECTED );
 339     }
 340     else
 341     {
 342       mActorEffectsEnabled = false;
 343       mActorEffectsButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, EFFECTS_OFF_ICON );
 344       mActorEffectsButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, EFFECTS_OFF_ICON_SELECTED );
 345     }
 346   }
 347
 348   //////////////////////////////////////////////////////////////
 349   //
 350   // Input handlers
 351   //
 352   //
 353
 354   bool OnLayoutButtonClicked( Toolkit::Button button )
 355   {
 356     ChangeImage();
 357     return true;
 358   }
 359
 360   bool OnEffectButtonClicked( Toolkit::Button button )
 361   {
 362     ToggleActorEffects();
 363     return true;
 364   }
 365
 366   /**
 367    * Main key event handler
 368    */
 369   void OnKeyEvent(const KeyEvent& event)
 370   {
 371     if(event.state == KeyEvent::Down)
 372     {
 373       if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 374       {
 375         mApplication.Quit();
 376       }
 377     }
 378   }
 379
 380   //////////////////////////////////////////////////////////////
 381   //
 382   // Misc
 383   //
 384   //
 385
 386
 387   void ChangeImage()
 388   {
 389     mCurrentImage++;
 390     if(MOTION_STRETCH_NUM_ACTOR_IMAGES == mCurrentImage)
 391     {
 392       mCurrentImage = 0;
 393     }
 394
 395     mMotionStretchEffect["url"] = MOTION_STRETCH_ACTOR_IMAGES[mCurrentImage];
 396     mMotionStretchImageView.SetProperty( Toolkit::ImageView::Property::IMAGE, mMotionStretchEffect );
 397   }
 398
 399
 400 private:
 401   Application&               mApplication;            ///< Application instance
 402   Toolkit::Control           mView;
 403   Toolkit::ToolBar           mToolBar;
 404   Layer                      mContentLayer;           ///< Content layer (contains actor for this stretch demo)
 405
 406   PushButton                 mActorEffectsButton;     ///< The actor effects toggling Button.
 407
 408   // Motion stretch
 409   Property::Map mMotionStretchEffect;
 410   ImageView mMotionStretchImageView;
 411
 412   // animate actor to position where user taps screen
 413   Animation mActorTapMovementAnimation;
 414
 415   // show different animations to demonstrate stretch effect working on an object only movement basis
 416   bool mActorEffectsEnabled;
 417   Animation mActorAnimation;
 418   int mCurrentActorAnimation;
 419
 420   // offer a selection of images that user can cycle between
 421   int mCurrentImage;
 422
 423   TapGestureDetector mTapGestureDetector;
 424
 425   DeviceOrientation mOrientation;               ///< Current Device orientation
 426   Animation mRotateAnimation;                   ///< Animation for rotating between landscape and portrait.
 427
 428 };
 429
 430 int DALI_EXPORT_API main(int argc, char **argv)
 431 {
 432   Application app = Application::New(&argc, &argv, DEMO_THEME_PATH);
 433   MotionStretchExampleApp test(app);
 434   app.MainLoop();
 435   return 0;
 436 }