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

   1 /*
   2  * Copyright (c) 2016 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     //Add an slideshow icon on the right of the title
 144     mActorEffectsButton = Toolkit::PushButton::New();
 145     mActorEffectsButton.SetUnselectedImage( EFFECTS_OFF_ICON );
 146     mActorEffectsButton.SetSelectedImage( EFFECTS_OFF_ICON_SELECTED );
 147     mActorEffectsButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnEffectButtonClicked );
 148     mToolBar.AddControl( mActorEffectsButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalCenter, DemoHelper::DEFAULT_PLAY_PADDING );
 149
 150     // Creates a mode button.
 151     // Create a effect toggle button. (right of toolbar)
 152     Toolkit::PushButton layoutButton = Toolkit::PushButton::New();
 153     layoutButton.SetUnselectedImage( LAYOUT_IMAGE );
 154     layoutButton.SetSelectedImage( LAYOUT_IMAGE_SELECTED );
 155     layoutButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnLayoutButtonClicked);
 156     layoutButton.SetLeaveRequired( true );
 157     mToolBar.AddControl( layoutButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalRight, DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
 158
 159     // Input
 160     mTapGestureDetector = TapGestureDetector::New();
 161     mTapGestureDetector.Attach( mContentLayer );
 162     mTapGestureDetector.DetectedSignal().Connect( this, &MotionStretchExampleApp::OnTap );
 163
 164     // set initial orientation
 165     Dali::Window winHandle = app.GetWindow();
 166     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT );
 167     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE );
 168     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT_INVERSE  );
 169     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE_INVERSE );
 170
 171     unsigned int degrees = 0;
 172     Rotate( static_cast< DeviceOrientation >( degrees ) );
 173
 174
 175     ///////////////////////////////////////////////////////
 176     //
 177     // Motion stretched actor
 178     //
 179     mMotionStretchEffect = Toolkit::CreateMotionStretchEffect();
 180     mMotionStretchEffect["url"] = MOTION_STRETCH_ACTOR_IMAGE1;
 181     mMotionStretchImageView = ImageView::New();
 182     mMotionStretchImageView.SetProperty( Toolkit::ImageView::Property::IMAGE, mMotionStretchEffect );
 183     mMotionStretchImageView.SetParentOrigin( ParentOrigin::CENTER );
 184     mMotionStretchImageView.SetAnchorPoint( AnchorPoint::CENTER );
 185     mMotionStretchImageView.SetSize( MOTION_STRETCH_ACTOR_WIDTH, MOTION_STRETCH_ACTOR_HEIGHT );
 186
 187     mContentLayer.Add( mMotionStretchImageView );
 188
 189     // Create shader used for doing motion stretch
 190     Toolkit::SetMotionStretchProperties( mMotionStretchImageView );
 191   }
 192
 193   //////////////////////////////////////////////////////////////
 194   //
 195   // Device Orientation Support
 196   //
 197   //
 198
 199   void Rotate( DeviceOrientation orientation )
 200   {
 201     // Resize the root actor
 202     Vector2 stageSize = Stage::GetCurrent().GetSize();
 203     Vector2 targetSize = stageSize;
 204     if( orientation == LANDSCAPE ||
 205         orientation == LANDSCAPE_INVERSE )
 206     {
 207       targetSize = Vector2( stageSize.y, stageSize.x );
 208     }
 209
 210     if( mOrientation != orientation )
 211     {
 212       mOrientation = orientation;
 213
 214       // check if actor is on stage
 215       if( mView.GetParent() )
 216       {
 217         // has parent so we expect it to be on stage, start animation
 218         mRotateAnimation = Animation::New( ORIENTATION_DURATION );
 219         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree( -orientation ) ), Vector3::ZAXIS ), AlphaFunction::EASE_OUT );
 220         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_WIDTH ), targetSize.width );
 221         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_HEIGHT ), targetSize.height );
 222         mRotateAnimation.Play();
 223       }
 224       else
 225       {
 226         // set the rotation to match the orientation
 227         mView.SetOrientation( Degree( -orientation ), Vector3::ZAXIS );
 228         mView.SetSize( targetSize );
 229       }
 230     }
 231     else
 232     {
 233       // for first time just set size
 234       mView.SetSize( targetSize );
 235     }
 236   }
 237
 238   //////////////////////////////////////////////////////////////
 239   //
 240   // Actor Animation
 241   //
 242   //
 243
 244   // move to point on screen that was tapped
 245   void OnTap( Actor actor, const TapGesture& tapGesture )
 246   {
 247     Vector3 destPos;
 248     float originOffsetX, originOffsetY;
 249
 250     // rotate offset (from top left origin to centre) into actor space
 251     Vector2 stageSize = Dali::Stage::GetCurrent().GetSize();
 252     actor.ScreenToLocal(originOffsetX, originOffsetY, stageSize.width * 0.5f, stageSize.height * 0.5f);
 253
 254     // get dest point in local actor space
 255     destPos.x = tapGesture.localPoint.x - originOffsetX;
 256     destPos.y = tapGesture.localPoint.y - originOffsetY;
 257     destPos.z = 0.0f;
 258
 259     float animDuration = 0.5f;
 260     mActorTapMovementAnimation = Animation::New( animDuration );
 261     if ( mMotionStretchImageView )
 262     {
 263       mActorTapMovementAnimation.AnimateTo( Property(mMotionStretchImageView, Actor::Property::POSITION), destPos, AlphaFunction::EASE_IN_OUT_SINE, TimePeriod(animDuration) );
 264     }
 265     mActorTapMovementAnimation.SetEndAction( Animation::Bake );
 266     mActorTapMovementAnimation.Play();
 267
 268
 269     // perform some spinning etc
 270     if(mActorEffectsEnabled)
 271     {
 272       switch(mCurrentActorAnimation)
 273       {
 274         // spin around y
 275         case 0:
 276         {
 277           float animDuration = 1.0f;
 278           mActorAnimation = Animation::New(animDuration);
 279           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::YAXIS ), AlphaFunction::EASE_IN_OUT );
 280           mActorAnimation.SetEndAction( Animation::Bake );
 281           mActorAnimation.Play();
 282         }
 283         break;
 284
 285         // spin around z
 286         case 1:
 287         {
 288           float animDuration = 1.0f;
 289           mActorAnimation = Animation::New(animDuration);
 290           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 291           mActorAnimation.SetEndAction( Animation::Bake );
 292           mActorAnimation.Play();
 293         }
 294         break;
 295
 296         // spin around y and z
 297         case 2:
 298         {
 299           float animDuration = 1.0f;
 300           mActorAnimation = Animation::New(animDuration);
 301           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::YAXIS ), AlphaFunction::EASE_IN_OUT );
 302           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 303           mActorAnimation.SetEndAction( Animation::Bake );
 304           mActorAnimation.Play();
 305         }
 306         break;
 307
 308         // scale
 309         case 3:
 310         {
 311           float animDuration = 1.0f;
 312           mActorAnimation = Animation::New(animDuration);
 313           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::SCALE ), Vector3(2.0f, 2.0f, 2.0f), AlphaFunction::BOUNCE, TimePeriod( 0.0f, 1.0f ) );
 314           mActorAnimation.SetEndAction( Animation::Bake );
 315           mActorAnimation.Play();
 316         }
 317         break;
 318
 319         default:
 320           break;
 321       }
 322
 323       mCurrentActorAnimation++;
 324       if(NUM_ACTOR_ANIMATIONS == mCurrentActorAnimation)
 325       {
 326         mCurrentActorAnimation = 0;
 327       }
 328     }
 329   }
 330
 331   void ToggleActorEffects()
 332   {
 333     if(!mActorEffectsEnabled)
 334     {
 335       mActorEffectsEnabled = true;
 336       mActorEffectsButton.SetUnselectedImage( EFFECTS_ON_ICON );
 337       mActorEffectsButton.SetSelectedImage( EFFECTS_ON_ICON_SELECTED );
 338     }
 339     else
 340     {
 341       mActorEffectsEnabled = false;
 342       mActorEffectsButton.SetUnselectedImage( EFFECTS_OFF_ICON );
 343       mActorEffectsButton.SetSelectedImage( EFFECTS_OFF_ICON_SELECTED );
 344     }
 345   }
 346
 347   //////////////////////////////////////////////////////////////
 348   //
 349   // Input handlers
 350   //
 351   //
 352
 353   bool OnLayoutButtonClicked( Toolkit::Button button )
 354   {
 355     ChangeImage();
 356     return true;
 357   }
 358
 359   bool OnEffectButtonClicked( Toolkit::Button button )
 360   {
 361     ToggleActorEffects();
 362     return true;
 363   }
 364
 365   /**
 366    * Main key event handler
 367    */
 368   void OnKeyEvent(const KeyEvent& event)
 369   {
 370     if(event.state == KeyEvent::Down)
 371     {
 372       if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 373       {
 374         mApplication.Quit();
 375       }
 376     }
 377   }
 378
 379   //////////////////////////////////////////////////////////////
 380   //
 381   // Misc
 382   //
 383   //
 384
 385
 386   void ChangeImage()
 387   {
 388     mCurrentImage++;
 389     if(MOTION_STRETCH_NUM_ACTOR_IMAGES == mCurrentImage)
 390     {
 391       mCurrentImage = 0;
 392     }
 393
 394     mMotionStretchEffect["url"] = MOTION_STRETCH_ACTOR_IMAGES[mCurrentImage];
 395     mMotionStretchImageView.SetProperty( Toolkit::ImageView::Property::IMAGE, mMotionStretchEffect );
 396   }
 397
 398
 399 private:
 400   Application&               mApplication;            ///< Application instance
 401   Toolkit::Control           mView;
 402   Toolkit::ToolBar           mToolBar;
 403   Layer                      mContentLayer;           ///< Content layer (contains actor for this stretch demo)
 404
 405   PushButton                 mActorEffectsButton;     ///< The actor effects toggling Button.
 406
 407   // Motion stretch
 408   Property::Map mMotionStretchEffect;
 409   ImageView mMotionStretchImageView;
 410
 411   // animate actor to position where user taps screen
 412   Animation mActorTapMovementAnimation;
 413
 414   // show different animations to demonstrate stretch effect working on an object only movement basis
 415   bool mActorEffectsEnabled;
 416   Animation mActorAnimation;
 417   int mCurrentActorAnimation;
 418
 419   // offer a selection of images that user can cycle between
 420   int mCurrentImage;
 421
 422   TapGestureDetector mTapGestureDetector;
 423
 424   DeviceOrientation mOrientation;               ///< Current Device orientation
 425   Animation mRotateAnimation;                   ///< Animation for rotating between landscape and portrait.
 426
 427 };
 428
 429 void RunTest(Application& app)
 430 {
 431   MotionStretchExampleApp test(app);
 432
 433   app.MainLoop();
 434 }
 435
 436 // Entry point for Linux & Tizen applications
 437 //
 438 int DALI_EXPORT_API main(int argc, char **argv)
 439 {
 440   Application app = Application::New(&argc, &argv, DEMO_THEME_PATH);
 441
 442   RunTest(app);
 443
 444   return 0;
 445 }