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( DALI_IMAGE_DIR "image-with-border-1.jpg" );
  44 const char* MOTION_STRETCH_ACTOR_IMAGE2( DALI_IMAGE_DIR "image-with-border-2.jpg" );
  45 const char* MOTION_STRETCH_ACTOR_IMAGE3( DALI_IMAGE_DIR "image-with-border-3.jpg" );
  46 const char* MOTION_STRETCH_ACTOR_IMAGE4( DALI_IMAGE_DIR "image-with-border-4.jpg" );
  47 const char* MOTION_STRETCH_ACTOR_IMAGE5( DALI_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 = DALI_IMAGE_DIR "background-default.png";
  62
  63 const char* TOOLBAR_IMAGE( DALI_IMAGE_DIR "top-bar.png" );
  64 const char* LAYOUT_IMAGE( DALI_IMAGE_DIR "icon-change.png" );
  65 const char* LAYOUT_IMAGE_SELECTED( DALI_IMAGE_DIR "icon-change-selected.png" );
  66 const char* APPLICATION_TITLE( "Motion Stretch" );
  67 const char* EFFECTS_OFF_ICON( DALI_IMAGE_DIR "icon-effects-off.png" );
  68 const char* EFFECTS_OFF_ICON_SELECTED( DALI_IMAGE_DIR "icon-effects-off-selected.png" );
  69 const char* EFFECTS_ON_ICON( DALI_IMAGE_DIR "icon-effects-on.png" );
  70 const char* EFFECTS_ON_ICON_SELECTED( DALI_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     mIconEffectsOff = ResourceImage::New( EFFECTS_OFF_ICON );
 144     mIconEffectsOffSelected = ResourceImage::New( EFFECTS_OFF_ICON_SELECTED );
 145     mIconEffectsOn = ResourceImage::New( EFFECTS_ON_ICON );
 146     mIconEffectsOnSelected = ResourceImage::New( EFFECTS_ON_ICON_SELECTED );
 147     mActorEffectsButton = Toolkit::PushButton::New();
 148     mActorEffectsButton.SetButtonImage( mIconEffectsOff );
 149     mActorEffectsButton.SetSelectedImage( mIconEffectsOffSelected );
 150     mActorEffectsButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnEffectButtonClicked );
 151     mToolBar.AddControl( mActorEffectsButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalCenter, DemoHelper::DEFAULT_PLAY_PADDING );
 152
 153     // Creates a mode button.
 154     // Create a effect toggle button. (right of toolbar)
 155     Image imageLayout = ResourceImage::New( LAYOUT_IMAGE );
 156     Image imageLayoutSelected = ResourceImage::New( LAYOUT_IMAGE_SELECTED );
 157     Toolkit::PushButton layoutButton = Toolkit::PushButton::New();
 158     layoutButton.SetButtonImage( imageLayout );
 159     layoutButton.SetSelectedImage( imageLayoutSelected );
 160     layoutButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnLayoutButtonClicked);
 161     layoutButton.SetLeaveRequired( 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
 176    // winHandle.GetOrientation().ChangedSignal().Connect( this, &MotionStretchExampleApp::OnOrientationChanged );
 177     unsigned int degrees = 0;
 178     Rotate( static_cast< DeviceOrientation >( degrees ) );
 179
 180
 181     ///////////////////////////////////////////////////////
 182     //
 183     // Motion stretched actor
 184     //
 185
 186     Image image = ResourceImage::New( MOTION_STRETCH_ACTOR_IMAGE1 );
 187     mMotionStretchImageActor = ImageActor::New(image);
 188     mMotionStretchImageActor.SetParentOrigin( ParentOrigin::CENTER );
 189     mMotionStretchImageActor.SetAnchorPoint( AnchorPoint::CENTER );
 190     mMotionStretchImageActor.SetSize(MOTION_STRETCH_ACTOR_WIDTH, MOTION_STRETCH_ACTOR_HEIGHT);
 191
 192     mContentLayer.Add( mMotionStretchImageActor );
 193
 194     // Create shader used for doing motion stretch
 195     mMotionStretchEffect = Toolkit::CreateMotionStretchEffect();
 196     Dali::Property::Index uModelProperty = mMotionStretchEffect.GetPropertyIndex( "uModelLastFrame" );
 197     Constraint constraint = Constraint::New<Matrix>( mMotionStretchEffect, uModelProperty, EqualToConstraint() );
 198     constraint.AddSource( Source( mMotionStretchImageActor , Actor::Property::WORLD_MATRIX ) );
 199     constraint.Apply();
 200     mMotionStretchImageActor.SetShaderEffect( mMotionStretchEffect );
 201   }
 202
 203   //////////////////////////////////////////////////////////////
 204   //
 205   // Device Orientation Support
 206   //
 207   //
 208
 209   void OnOrientationChanged( Orientation orientation )
 210   {
 211     unsigned int degrees = orientation.GetDegrees();
 212     Rotate( static_cast< DeviceOrientation >( degrees ) );
 213   }
 214
 215   void Rotate( DeviceOrientation orientation )
 216   {
 217     // Resize the root actor
 218     Vector2 stageSize = Stage::GetCurrent().GetSize();
 219     Vector2 targetSize = stageSize;
 220     if( orientation == LANDSCAPE ||
 221         orientation == LANDSCAPE_INVERSE )
 222     {
 223       targetSize = Vector2( stageSize.y, stageSize.x );
 224     }
 225
 226     if( mOrientation != orientation )
 227     {
 228       mOrientation = orientation;
 229
 230       // check if actor is on stage
 231       if( mView.GetParent() )
 232       {
 233         // has parent so we expect it to be on stage, start animation
 234         mRotateAnimation = Animation::New( ORIENTATION_DURATION );
 235         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree( -orientation ) ), Vector3::ZAXIS ), AlphaFunction::EASE_OUT );
 236         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_WIDTH ), targetSize.width );
 237         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_HEIGHT ), targetSize.height );
 238         mRotateAnimation.Play();
 239       }
 240       else
 241       {
 242         // set the rotation to match the orientation
 243         mView.SetOrientation( Degree( -orientation ), Vector3::ZAXIS );
 244         mView.SetSize( targetSize );
 245       }
 246     }
 247     else
 248     {
 249       // for first time just set size
 250       mView.SetSize( targetSize );
 251     }
 252   }
 253
 254   //////////////////////////////////////////////////////////////
 255   //
 256   // Actor Animation
 257   //
 258   //
 259
 260   // move to point on screen that was tapped
 261   void OnTap( Actor actor, const TapGesture& tapGesture )
 262   {
 263     Vector3 destPos;
 264     float originOffsetX, originOffsetY;
 265
 266     // rotate offset (from top left origin to centre) into actor space
 267     Vector2 stageSize = Dali::Stage::GetCurrent().GetSize();
 268     actor.ScreenToLocal(originOffsetX, originOffsetY, stageSize.width * 0.5f, stageSize.height * 0.5f);
 269
 270     // get dest point in local actor space
 271     destPos.x = tapGesture.localPoint.x - originOffsetX;
 272     destPos.y = tapGesture.localPoint.y - originOffsetY;
 273     destPos.z = 0.0f;
 274
 275     float animDuration = 0.5f;
 276     mActorTapMovementAnimation = Animation::New( animDuration );
 277     if ( mMotionStretchImageActor )
 278     {
 279       mActorTapMovementAnimation.AnimateTo( Property(mMotionStretchImageActor, Actor::Property::POSITION), destPos, AlphaFunction::EASE_IN_OUT_SINE, TimePeriod(animDuration) );
 280     }
 281     mActorTapMovementAnimation.SetEndAction( Animation::Bake );
 282     mActorTapMovementAnimation.Play();
 283
 284
 285     // perform some spinning etc
 286     if(mActorEffectsEnabled)
 287     {
 288       switch(mCurrentActorAnimation)
 289       {
 290         // spin around y
 291         case 0:
 292         {
 293           float animDuration = 1.0f;
 294           mActorAnimation = Animation::New(animDuration);
 295           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::YAXIS ), AlphaFunction::EASE_IN_OUT );
 296           mActorAnimation.SetEndAction( Animation::Bake );
 297           mActorAnimation.Play();
 298         }
 299         break;
 300
 301         // spin around z
 302         case 1:
 303         {
 304           float animDuration = 1.0f;
 305           mActorAnimation = Animation::New(animDuration);
 306           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 307           mActorAnimation.SetEndAction( Animation::Bake );
 308           mActorAnimation.Play();
 309         }
 310         break;
 311
 312         // spin around y and z
 313         case 2:
 314         {
 315           float animDuration = 1.0f;
 316           mActorAnimation = Animation::New(animDuration);
 317           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::YAXIS ), AlphaFunction::EASE_IN_OUT );
 318           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 319           mActorAnimation.SetEndAction( Animation::Bake );
 320           mActorAnimation.Play();
 321         }
 322         break;
 323
 324         // scale
 325         case 3:
 326         {
 327           float animDuration = 1.0f;
 328           mActorAnimation = Animation::New(animDuration);
 329           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::SCALE ), Vector3(2.0f, 2.0f, 2.0f), AlphaFunction::BOUNCE, TimePeriod( 0.0f, 1.0f ) );
 330           mActorAnimation.SetEndAction( Animation::Bake );
 331           mActorAnimation.Play();
 332         }
 333         break;
 334
 335         default:
 336           break;
 337       }
 338
 339       mCurrentActorAnimation++;
 340       if(NUM_ACTOR_ANIMATIONS == mCurrentActorAnimation)
 341       {
 342         mCurrentActorAnimation = 0;
 343       }
 344     }
 345   }
 346
 347   void ToggleActorEffects()
 348   {
 349     if(!mActorEffectsEnabled)
 350     {
 351       mActorEffectsEnabled = true;
 352       mActorEffectsButton.SetButtonImage( mIconEffectsOn );
 353       mActorEffectsButton.SetSelectedImage( mIconEffectsOnSelected );
 354     }
 355     else
 356     {
 357       mActorEffectsEnabled = false;
 358       mActorEffectsButton.SetButtonImage( mIconEffectsOff );
 359       mActorEffectsButton.SetSelectedImage( mIconEffectsOffSelected );
 360     }
 361   }
 362
 363   //////////////////////////////////////////////////////////////
 364   //
 365   // Input handlers
 366   //
 367   //
 368
 369   bool OnLayoutButtonClicked( Toolkit::Button button )
 370   {
 371     ChangeImage();
 372     return true;
 373   }
 374
 375   bool OnEffectButtonClicked( Toolkit::Button button )
 376   {
 377     ToggleActorEffects();
 378     return true;
 379   }
 380
 381   /**
 382    * Main key event handler
 383    */
 384   void OnKeyEvent(const KeyEvent& event)
 385   {
 386     if(event.state == KeyEvent::Down)
 387     {
 388       if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 389       {
 390         mApplication.Quit();
 391       }
 392     }
 393   }
 394
 395   //////////////////////////////////////////////////////////////
 396   //
 397   // Misc
 398   //
 399   //
 400
 401
 402   void ChangeImage()
 403   {
 404     mCurrentImage++;
 405     if(MOTION_STRETCH_NUM_ACTOR_IMAGES == mCurrentImage)
 406     {
 407       mCurrentImage = 0;
 408     }
 409
 410     Image stretchImage = ResourceImage::New( MOTION_STRETCH_ACTOR_IMAGES[mCurrentImage] );
 411     mMotionStretchImageActor.SetImage(stretchImage);
 412   }
 413
 414
 415 private:
 416   Application&               mApplication;            ///< Application instance
 417   Toolkit::Control           mView;
 418   Toolkit::ToolBar           mToolBar;
 419   Image                      mIconEffectsOff;
 420   Image                      mIconEffectsOffSelected;
 421   Image                      mIconEffectsOn;
 422   Image                      mIconEffectsOnSelected;
 423   Layer                      mContentLayer;           ///< Content layer (contains actor for this stretch demo)
 424
 425   PushButton                 mActorEffectsButton;     ///< The actor effects toggling Button.
 426
 427   // Motion stretch
 428   ShaderEffect mMotionStretchEffect;
 429   ImageActor mMotionStretchImageActor;
 430
 431   // animate actor to position where user taps screen
 432   Animation mActorTapMovementAnimation;
 433
 434   // show different animations to demonstrate stretch effect working on an object only movement basis
 435   bool mActorEffectsEnabled;
 436   Animation mActorAnimation;
 437   int mCurrentActorAnimation;
 438
 439   // offer a selection of images that user can cycle between
 440   int mCurrentImage;
 441
 442   TapGestureDetector mTapGestureDetector;
 443
 444   DeviceOrientation mOrientation;               ///< Current Device orientation
 445   Animation mRotateAnimation;                   ///< Animation for rotating between landscape and portrait.
 446
 447 };
 448
 449 void RunTest(Application& app)
 450 {
 451   MotionStretchExampleApp test(app);
 452
 453   app.MainLoop();
 454 }
 455
 456 // Entry point for Linux & Tizen applications
 457 //
 458 int main(int argc, char **argv)
 459 {
 460   Application app = Application::New(&argc, &argv, DALI_DEMO_THEME_PATH);
 461
 462   RunTest(app);
 463
 464   return 0;
 465 }