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