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     DemoHelper::RequestThemeChange();
 129
 130     Stage::GetCurrent().KeyEventSignal().Connect(this, &MotionStretchExampleApp::OnKeyEvent);
 131
 132     // Creates a default view with a default tool bar.
 133     // The view is added to the stage.
 134     mContentLayer = DemoHelper::CreateView( mApplication,
 135                                             mView,
 136                                             mToolBar,
 137                                             BACKGROUND_IMAGE_PATH,
 138                                             TOOLBAR_IMAGE,
 139                                             APPLICATION_TITLE );
 140
 141     //Add an slideshow icon on the right of the title
 142     mIconEffectsOff = ResourceImage::New( EFFECTS_OFF_ICON );
 143     mIconEffectsOn = ResourceImage::New( EFFECTS_ON_ICON );
 144     mActorEffectsButton = Toolkit::PushButton::New();
 145     mActorEffectsButton.SetBackgroundImage( mIconEffectsOff );
 146     mActorEffectsButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnEffectButtonClicked );
 147     mToolBar.AddControl( mActorEffectsButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalCenter, DemoHelper::DEFAULT_PLAY_PADDING );
 148
 149     // Creates a mode button.
 150     // Create a effect toggle button. (right of toolbar)
 151     Image imageLayout = ResourceImage::New( LAYOUT_IMAGE );
 152     Toolkit::PushButton layoutButton = Toolkit::PushButton::New();
 153     layoutButton.SetBackgroundImage(imageLayout);
 154     layoutButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnLayoutButtonClicked);
 155     layoutButton.SetLeaveRequired( true );
 156     mToolBar.AddControl( layoutButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalRight, DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
 157
 158     // Input
 159     mTapGestureDetector = TapGestureDetector::New();
 160     mTapGestureDetector.Attach( mContentLayer );
 161     mTapGestureDetector.DetectedSignal().Connect( this, &MotionStretchExampleApp::OnTap );
 162
 163     // set initial orientation
 164     Dali::Window winHandle = app.GetWindow();
 165     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT );
 166     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE );
 167     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT_INVERSE  );
 168     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE_INVERSE );
 169
 170     winHandle.GetOrientation().ChangedSignal().Connect( this, &MotionStretchExampleApp::OnOrientationChanged );
 171     unsigned int degrees = winHandle.GetOrientation().GetDegrees();
 172     Rotate( static_cast< DeviceOrientation >( degrees ) );
 173
 174
 175     ///////////////////////////////////////////////////////
 176     //
 177     // Motion stretched actor
 178     //
 179
 180     Image image = ResourceImage::New( MOTION_STRETCH_ACTOR_IMAGE1 );
 181     mMotionStretchImageActor = ImageActor::New(image);
 182     mMotionStretchImageActor.SetParentOrigin( ParentOrigin::CENTER );
 183     mMotionStretchImageActor.SetAnchorPoint( AnchorPoint::CENTER );
 184     mMotionStretchImageActor.SetSize(MOTION_STRETCH_ACTOR_WIDTH, MOTION_STRETCH_ACTOR_HEIGHT);
 185
 186     mContentLayer.Add( mMotionStretchImageActor );
 187
 188     // Create shader used for doing motion stretch
 189     mMotionStretchEffect = MotionStretchEffect::Apply(mMotionStretchImageActor);
 190   }
 191
 192   //////////////////////////////////////////////////////////////
 193   //
 194   // Device Orientation Support
 195   //
 196   //
 197
 198   void OnOrientationChanged( Orientation orientation )
 199   {
 200     unsigned int degrees = orientation.GetDegrees();
 201     Rotate( static_cast< DeviceOrientation >( degrees ) );
 202   }
 203
 204   void Rotate( DeviceOrientation orientation )
 205   {
 206     // Resize the root actor
 207     Vector2 stageSize = Stage::GetCurrent().GetSize();
 208     Vector2 targetSize = stageSize;
 209     if( orientation == LANDSCAPE ||
 210         orientation == LANDSCAPE_INVERSE )
 211     {
 212       targetSize = Vector2( stageSize.y, stageSize.x );
 213     }
 214
 215     if( mOrientation != orientation )
 216     {
 217       mOrientation = orientation;
 218
 219       // check if actor is on stage
 220       if( mView.GetParent() )
 221       {
 222         // has parent so we expect it to be on stage, start animation
 223         mRotateAnimation = Animation::New( ORIENTATION_DURATION );
 224         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree( -orientation ) ), Vector3::ZAXIS ), AlphaFunction::EASE_OUT );
 225         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_WIDTH ), targetSize.width );
 226         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_HEIGHT ), targetSize.height );
 227         mRotateAnimation.Play();
 228       }
 229       else
 230       {
 231         // set the rotation to match the orientation
 232         mView.SetOrientation( Degree( -orientation ), Vector3::ZAXIS );
 233         mView.SetSize( targetSize );
 234       }
 235     }
 236     else
 237     {
 238       // for first time just set size
 239       mView.SetSize( 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 stageSize = Dali::Stage::GetCurrent().GetSize();
 257     actor.ScreenToLocal(originOffsetX, originOffsetY, stageSize.width * 0.5f, stageSize.height * 0.5f);
 258
 259     // get dest point in local actor space
 260     destPos.x = tapGesture.localPoint.x - originOffsetX;
 261     destPos.y = tapGesture.localPoint.y - originOffsetY;
 262     destPos.z = 0.0f;
 263
 264     float animDuration = 0.5f;
 265     mActorTapMovementAnimation = Animation::New( animDuration );
 266     if ( mMotionStretchImageActor )
 267     {
 268       mActorTapMovementAnimation.AnimateTo( Property(mMotionStretchImageActor, Actor::Property::POSITION), destPos, AlphaFunction::EASE_IN_OUT_SINE, TimePeriod(animDuration) );
 269     }
 270     mActorTapMovementAnimation.SetEndAction( Animation::Bake );
 271     mActorTapMovementAnimation.Play();
 272
 273
 274     // perform some spinning etc
 275     if(mActorEffectsEnabled)
 276     {
 277       switch(mCurrentActorAnimation)
 278       {
 279         // spin around y
 280         case 0:
 281         {
 282           float animDuration = 1.0f;
 283           mActorAnimation = Animation::New(animDuration);
 284           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::YAXIS ), AlphaFunction::EASE_IN_OUT );
 285           mActorAnimation.SetEndAction( Animation::Bake );
 286           mActorAnimation.Play();
 287         }
 288         break;
 289
 290         // spin around z
 291         case 1:
 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::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 296           mActorAnimation.SetEndAction( Animation::Bake );
 297           mActorAnimation.Play();
 298         }
 299         break;
 300
 301         // spin around y and z
 302         case 2:
 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::YAXIS ), AlphaFunction::EASE_IN_OUT );
 307           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 308           mActorAnimation.SetEndAction( Animation::Bake );
 309           mActorAnimation.Play();
 310         }
 311         break;
 312
 313         // scale
 314         case 3:
 315         {
 316           float animDuration = 1.0f;
 317           mActorAnimation = Animation::New(animDuration);
 318           mActorAnimation.AnimateBy( Property( mMotionStretchImageActor, Actor::Property::SCALE ), Vector3(2.0f, 2.0f, 2.0f), AlphaFunction::BOUNCE, TimePeriod( 0.0f, 1.0f ) );
 319           mActorAnimation.SetEndAction( Animation::Bake );
 320           mActorAnimation.Play();
 321         }
 322         break;
 323
 324         default:
 325           break;
 326       }
 327
 328       mCurrentActorAnimation++;
 329       if(NUM_ACTOR_ANIMATIONS == mCurrentActorAnimation)
 330       {
 331         mCurrentActorAnimation = 0;
 332       }
 333     }
 334   }
 335
 336   void ToggleActorEffects()
 337   {
 338     if(!mActorEffectsEnabled)
 339     {
 340       mActorEffectsEnabled = true;
 341       mActorEffectsButton.SetBackgroundImage( mIconEffectsOn );
 342     }
 343     else
 344     {
 345       mActorEffectsEnabled = false;
 346       mActorEffectsButton.SetBackgroundImage( mIconEffectsOff );
 347     }
 348   }
 349
 350   //////////////////////////////////////////////////////////////
 351   //
 352   // Input handlers
 353   //
 354   //
 355
 356   bool OnLayoutButtonClicked( Toolkit::Button button )
 357   {
 358     ChangeImage();
 359     return true;
 360   }
 361
 362   bool OnEffectButtonClicked( Toolkit::Button button )
 363   {
 364     ToggleActorEffects();
 365     return true;
 366   }
 367
 368   /**
 369    * Main key event handler
 370    */
 371   void OnKeyEvent(const KeyEvent& event)
 372   {
 373     if(event.state == KeyEvent::Down)
 374     {
 375       if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 376       {
 377         mApplication.Quit();
 378       }
 379     }
 380   }
 381
 382   //////////////////////////////////////////////////////////////
 383   //
 384   // Misc
 385   //
 386   //
 387
 388
 389   void ChangeImage()
 390   {
 391     mCurrentImage++;
 392     if(MOTION_STRETCH_NUM_ACTOR_IMAGES == mCurrentImage)
 393     {
 394       mCurrentImage = 0;
 395     }
 396
 397     Image stretchImage = ResourceImage::New( MOTION_STRETCH_ACTOR_IMAGES[mCurrentImage] );
 398     mMotionStretchImageActor.SetImage(stretchImage);
 399   }
 400
 401
 402 private:
 403   Application&               mApplication;            ///< Application instance
 404   Toolkit::Control           mView;
 405   Toolkit::ToolBar           mToolBar;
 406   Image                      mIconEffectsOff;
 407   Image                      mIconEffectsOn;
 408   Layer                      mContentLayer;           ///< Content layer (contains actor for this stretch demo)
 409
 410   PushButton                 mActorEffectsButton;     ///< The actor effects toggling Button.
 411
 412   // Motion stretch
 413   MotionStretchEffect mMotionStretchEffect;
 414   ImageActor mMotionStretchImageActor;
 415
 416   // animate actor to position where user taps screen
 417   Animation mActorTapMovementAnimation;
 418
 419   // show different animations to demonstrate stretch effect working on an object only movement basis
 420   bool mActorEffectsEnabled;
 421   Animation mActorAnimation;
 422   int mCurrentActorAnimation;
 423
 424   // offer a selection of images that user can cycle between
 425   int mCurrentImage;
 426
 427   TapGestureDetector mTapGestureDetector;
 428
 429   DeviceOrientation mOrientation;               ///< Current Device orientation
 430   Animation mRotateAnimation;                   ///< Animation for rotating between landscape and portrait.
 431
 432 };
 433
 434 void RunTest(Application& app)
 435 {
 436   MotionStretchExampleApp test(app);
 437
 438   app.MainLoop();
 439 }
 440
 441 // Entry point for Linux & Tizen applications
 442 //
 443 int main(int argc, char **argv)
 444 {
 445   Application app = Application::New(&argc, &argv);
 446
 447   RunTest(app);
 448
 449   return 0;
 450 }