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