examples/dissolve-effect/dissolve-effect-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 // EXTERNAL INCLUDES
  19 #include <math.h>
  20
  21 // INTERNAL INCLUDES
  22 #include "shared/view.h"
  23
  24 #include <dali/dali.h>
  25 #include <dali-toolkit/dali-toolkit.h>
  26 #include <dali-toolkit/devel-api/shader-effects/dissolve-effect.h>
  27
  28 using namespace Dali;
  29
  30 using Dali::Toolkit::TextLabel;
  31
  32 // LOCAL STUFF
  33 namespace
  34 {
  35
  36 const char * const TOOLBAR_IMAGE( DEMO_IMAGE_DIR "top-bar.png" );
  37 const char * const APPLICATION_TITLE_HIGHP( "Dissolve Effect(highp)" );
  38 const char * const APPLICATION_TITLE_MEDIUMP( "Dissolve Effect(mediump)" );
  39 const char * const EFFECT_HIGHP_IMAGE( DEMO_IMAGE_DIR "icon-highp.png" );
  40 const char * const EFFECT_HIGHP_IMAGE_SELECTED( DEMO_IMAGE_DIR "icon-highp-selected.png" );
  41 const char * const EFFECT_MEDIUMP_IMAGE( DEMO_IMAGE_DIR "icon-mediump.png" );
  42 const char * const EFFECT_MEDIUMP_IMAGE_SELECTED( DEMO_IMAGE_DIR "icon-mediump-selected.png" );
  43 const char * const PLAY_ICON( DEMO_IMAGE_DIR "icon-play.png" );
  44 const char * const PLAY_ICON_SELECTED( DEMO_IMAGE_DIR "icon-play-selected.png" );
  45 const char * const STOP_ICON( DEMO_IMAGE_DIR "icon-stop.png" );
  46 const char * const STOP_ICON_SELECTED( DEMO_IMAGE_DIR "icon-stop-selected.png" );
  47
  48 const char* IMAGES[] =
  49 {
  50   DEMO_IMAGE_DIR "gallery-large-1.jpg",
  51   DEMO_IMAGE_DIR "gallery-large-2.jpg",
  52   DEMO_IMAGE_DIR "gallery-large-3.jpg",
  53   DEMO_IMAGE_DIR "gallery-large-4.jpg",
  54   DEMO_IMAGE_DIR "gallery-large-5.jpg",
  55   DEMO_IMAGE_DIR "gallery-large-6.jpg",
  56   DEMO_IMAGE_DIR "gallery-large-7.jpg",
  57   DEMO_IMAGE_DIR "gallery-large-8.jpg",
  58   DEMO_IMAGE_DIR "gallery-large-9.jpg",
  59   DEMO_IMAGE_DIR "gallery-large-10.jpg",
  60   DEMO_IMAGE_DIR "gallery-large-11.jpg",
  61   DEMO_IMAGE_DIR "gallery-large-12.jpg",
  62   DEMO_IMAGE_DIR "gallery-large-13.jpg",
  63   DEMO_IMAGE_DIR "gallery-large-14.jpg",
  64   DEMO_IMAGE_DIR "gallery-large-15.jpg",
  65   DEMO_IMAGE_DIR "gallery-large-16.jpg",
  66   DEMO_IMAGE_DIR "gallery-large-17.jpg",
  67   DEMO_IMAGE_DIR "gallery-large-18.jpg",
  68   DEMO_IMAGE_DIR "gallery-large-19.jpg",
  69   DEMO_IMAGE_DIR "gallery-large-20.jpg",
  70   DEMO_IMAGE_DIR "gallery-large-21.jpg",
  71 };
  72
  73 const int NUM_IMAGES( sizeof(IMAGES) / sizeof(IMAGES[0]) );
  74
  75 // The duration of the current image staying on screen when slideshow is on
  76 const int VIEWINGTIME = 2000; // 2 seconds
  77
  78 const float TRANSITION_DURATION = 2.5f; //2.5 second
  79
  80 const float INITIAL_DEPTH = 10.0f;
  81
  82 /**
  83  * @brief Load an image, scaled-down to no more than the stage dimensions.
  84  *
  85  * Uses image scaling mode SCALE_TO_FILL to resize the image at
  86  * load time to cover the entire stage with pixels with no borders,
  87  * and filter mode BOX_THEN_LINEAR to sample the image with
  88  * maximum quality.
  89  */
  90 ResourceImage LoadStageFillingImage( const char * const imagePath )
  91 {
  92   Size stageSize = Stage::GetCurrent().GetSize();
  93   return ResourceImage::New( imagePath, ImageDimensions( stageSize.x, stageSize.y ), Dali::FittingMode::SCALE_TO_FILL, Dali::SamplingMode::BOX_THEN_LINEAR );
  94 }
  95
  96 } // namespace
  97
  98 class DissolveEffectApp : public ConnectionTracker
  99 {
 100 public:
 101
 102   /**
 103    * Constructor
 104    * @param application class, stored as reference
 105    */
 106   DissolveEffectApp( Application& application );
 107
 108   ~DissolveEffectApp();
 109
 110 private:
 111
 112   /**
 113    * This method gets called once the main loop of application is up and running
 114    */
 115   void OnInit( Application& application );
 116   /**
 117    * PanGesture callback. This method gets called when the pan gesture is detected.
 118    * @param[in] actor The actor receiving the pan gesture.
 119    * @param[in] gesture The detected pan gesture.
 120    */
 121   void OnPanGesture( Actor actor, const PanGesture& gesture );
 122
 123   /**
 124    * Set up the animations for transition
 125    * @param[in] position The point ( locates within rectange {(0,0),(0,1),(1,0),(1,1)} ) passing through the central line of the dissolve effect
 126    * @param[in] displacement The direction of the central line of the dissolve effect
 127    */
 128   void StartTransition(Vector2 position, Vector2 displacement);
 129   /**
 130    * Callback function of effect-switch button
 131    * Change the precision of the effect shader when the effect button is clicked
 132    * @param[in] button The handle of the clicked button
 133    */
 134   bool OnEffectButtonClicked( Toolkit::Button button );
 135   /**
 136    * Callback function of slideshow button
 137    * Start or stop the automatical image display when the slideshow button is clicked
 138    * @param[in] button The handle of the clicked button
 139    */
 140   bool OnSildeshowButtonClicked( Toolkit::Button button );
 141   /**
 142    * Callback function of cube transition completed signal
 143    * @param[in] effect The cube effect used for the transition
 144    * @param[in] imageActor The target imageActor of the completed transition
 145    */
 146   void OnTransitionCompleted(Animation& source);
 147   /**
 148    * Callback function of timer tick
 149    * The timer is used to count the image display duration after cube transition in slideshow,
 150    */
 151   bool OnTimerTick();
 152
 153   /**
 154    * Main key event handler
 155    */
 156   void OnKeyEvent(const KeyEvent& event);
 157
 158 private:
 159   Application&                    mApplication;
 160   Toolkit::Control                mView;
 161   Toolkit::ToolBar                mToolBar;
 162   Layer                           mContent;
 163   Toolkit::TextLabel              mTitleActor;
 164   Actor                           mParent;
 165
 166   Toolkit::ImageView              mCurrentImage;
 167   Toolkit::ImageView              mNextImage;
 168   unsigned int                    mIndex;
 169
 170   Property::Map                   mDissolveEffect;
 171   Property::Map                   mEmptyEffect;
 172
 173   bool                            mUseHighPrecision;
 174   Animation                       mAnimation;
 175
 176   PanGestureDetector              mPanGestureDetector;
 177   bool                            mIsTransiting;
 178
 179   bool                            mSlideshow;
 180   Timer                           mViewTimer;
 181   bool                            mTimerReady;
 182   unsigned int                    mCentralLineIndex;
 183
 184   Image                           mIconPlay;
 185   Image                           mIconPlaySelected;
 186   Image                           mIconStop;
 187   Image                           mIconStopSelected;
 188   Toolkit::PushButton             mPlayStopButton;
 189
 190   Image                           mIconHighP;
 191   Image                           mIconHighPSelected;
 192   Image                           mIconMediumP;
 193   Image                           mIconMediumPSelected;
 194   Toolkit::PushButton             mEffectChangeButton;
 195 };
 196
 197 DissolveEffectApp::DissolveEffectApp( Application& application )
 198 : mApplication( application ),
 199   mIndex( 0 ),
 200   mUseHighPrecision(true),
 201   mIsTransiting( false ),
 202   mSlideshow( false ),
 203   mTimerReady( false ),
 204   mCentralLineIndex( 0 )
 205 {
 206   mApplication.InitSignal().Connect( this, &DissolveEffectApp::OnInit );
 207 }
 208
 209 DissolveEffectApp::~DissolveEffectApp()
 210 {
 211   //Nothing to do
 212 }
 213
 214 void DissolveEffectApp::OnInit( Application& application )
 215 {
 216   Stage::GetCurrent().KeyEventSignal().Connect(this, &DissolveEffectApp::OnKeyEvent);
 217
 218   // Creates a default view with a default tool bar, the view is added to the stage.
 219   mContent = DemoHelper::CreateView( application, mView,mToolBar, "", TOOLBAR_IMAGE, "" );
 220
 221   // Add an effect-changing button on the right of the tool bar.
 222   mIconHighP = ResourceImage::New( EFFECT_HIGHP_IMAGE );
 223   mIconHighPSelected = ResourceImage::New( EFFECT_HIGHP_IMAGE_SELECTED );
 224   mIconMediumP = ResourceImage::New( EFFECT_MEDIUMP_IMAGE );
 225   mIconMediumPSelected = ResourceImage::New( EFFECT_MEDIUMP_IMAGE_SELECTED );
 226   mEffectChangeButton = Toolkit::PushButton::New();
 227   mEffectChangeButton.SetButtonImage( mIconHighP );
 228   mEffectChangeButton.SetSelectedImage( mIconHighPSelected );
 229   mEffectChangeButton.ClickedSignal().Connect( this, &DissolveEffectApp::OnEffectButtonClicked );
 230   mToolBar.AddControl( mEffectChangeButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalRight, DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
 231
 232   // Add title to the tool bar.
 233   mTitleActor = DemoHelper::CreateToolBarLabel( APPLICATION_TITLE_HIGHP );
 234   mToolBar.AddControl( mTitleActor, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarTitlePercentage, Toolkit::Alignment::HorizontalCenter );
 235
 236   // Add an slide-show button on the right of the title
 237   mIconPlay = ResourceImage::New( PLAY_ICON );
 238   mIconPlaySelected = ResourceImage::New( PLAY_ICON_SELECTED );
 239   mIconStop = ResourceImage::New( STOP_ICON );
 240   mIconStopSelected = ResourceImage::New( STOP_ICON_SELECTED );
 241   mPlayStopButton = Toolkit::PushButton::New();
 242   mPlayStopButton.SetButtonImage( mIconPlay );
 243   mPlayStopButton.SetSelectedImage( mIconPlaySelected );
 244   mPlayStopButton.ClickedSignal().Connect( this, &DissolveEffectApp::OnSildeshowButtonClicked );
 245   mToolBar.AddControl( mPlayStopButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalCenter, DemoHelper::DEFAULT_PLAY_PADDING );
 246
 247   // use pan gesture to detect the cursor or finger movement
 248   mPanGestureDetector = PanGestureDetector::New();
 249   mPanGestureDetector.DetectedSignal().Connect( this, &DissolveEffectApp::OnPanGesture );
 250
 251   mViewTimer = Timer::New( VIEWINGTIME );
 252   mViewTimer.TickSignal().Connect( this, &DissolveEffectApp::OnTimerTick );
 253   mTimerReady = true;
 254
 255   // Set size to stage size to avoid seeing a black border on transition
 256   mParent = Actor::New();
 257   mParent.SetSize( Stage::GetCurrent().GetSize() );
 258   mParent.SetParentOrigin( ParentOrigin::CENTER );
 259   mContent.Add( mParent );
 260
 261   // show the first image
 262   mCurrentImage = Toolkit::ImageView::New( LoadStageFillingImage( IMAGES[mIndex] ) );
 263   mCurrentImage.SetParentOrigin( ParentOrigin::CENTER );
 264   mCurrentImage.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 265   mCurrentImage.SetSizeScalePolicy( SizeScalePolicy::FIT_WITH_ASPECT_RATIO );
 266   mParent.Add( mCurrentImage );
 267
 268   mPanGestureDetector.Attach( mCurrentImage );
 269
 270   mDissolveEffect = Dali::Toolkit::CreateDissolveEffect( mUseHighPrecision );
 271   mEmptyEffect.Insert( "shader", Property::Value() );
 272 }
 273
 274 // signal handler, called when the pan gesture is detected
 275 void DissolveEffectApp::OnPanGesture( Actor actor, const PanGesture& gesture )
 276 {
 277   // does not response when the animation has not finished
 278   if( mIsTransiting || mSlideshow )
 279   {
 280     return;
 281   }
 282
 283   if( gesture.state == Gesture::Continuing )
 284   {
 285     if( gesture.displacement.x < 0)
 286     {
 287       mIndex = (mIndex + 1)%NUM_IMAGES;
 288     }
 289     else
 290     {
 291       mIndex = (mIndex + NUM_IMAGES -1)%NUM_IMAGES;
 292     }
 293
 294     Image image = LoadStageFillingImage( IMAGES[ mIndex ] );
 295     mNextImage = Toolkit::ImageView::New( image );
 296     mNextImage.SetParentOrigin( ParentOrigin::CENTER );
 297     mNextImage.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 298     mNextImage.SetSizeScalePolicy( SizeScalePolicy::FIT_WITH_ASPECT_RATIO );
 299     mNextImage.SetZ(INITIAL_DEPTH);
 300     mParent.Add( mNextImage );
 301     Vector2 size = Vector2( mCurrentImage.GetCurrentSize() );
 302     StartTransition( gesture.position / size, gesture.displacement * Vector2(1.0, size.x/size.y));
 303   }
 304 }
 305
 306 void DissolveEffectApp::StartTransition(Vector2 position, Vector2 displacement)
 307 {
 308   mAnimation = Animation::New(TRANSITION_DURATION);
 309
 310   Dali::Toolkit::DissolveEffectSetCentralLine( mCurrentImage, position, displacement, 0.0f );
 311   mCurrentImage.SetProperty( Toolkit::ImageView::Property::IMAGE, mDissolveEffect );
 312   mAnimation.AnimateTo( Property( mCurrentImage, "uPercentage" ), 1.0f, AlphaFunction::LINEAR );
 313
 314   mNextImage.SetOpacity(0.0f);
 315   mAnimation.AnimateTo( Property( mNextImage, Actor::Property::COLOR_ALPHA ), 1.0f, AlphaFunction::LINEAR );
 316
 317   if(mUseHighPrecision)
 318   {
 319     Dali::Toolkit::DissolveEffectSetCentralLine( mNextImage, position, displacement, 1.0f );
 320     mNextImage.SetProperty( Toolkit::ImageView::Property::IMAGE, mDissolveEffect );
 321     mAnimation.AnimateTo( Property( mNextImage, "uPercentage" ), 0.0f, AlphaFunction::LINEAR );
 322   }
 323   else
 324   {
 325     mAnimation.AnimateTo( Property( mNextImage, Actor::Property::POSITION ), Vector3( 0.0f, 0.0f, 0.0f ), AlphaFunction::LINEAR );
 326   }
 327
 328   mAnimation.FinishedSignal().Connect( this, &DissolveEffectApp::OnTransitionCompleted );
 329   mAnimation.Play();
 330   mIsTransiting = true;
 331 }
 332
 333 void DissolveEffectApp::OnKeyEvent(const KeyEvent& event)
 334 {
 335   if(event.state == KeyEvent::Down)
 336   {
 337     if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 338     {
 339       mApplication.Quit();
 340     }
 341   }
 342 }
 343
 344 bool DissolveEffectApp::OnEffectButtonClicked( Toolkit::Button button )
 345 {
 346   mUseHighPrecision = !mUseHighPrecision;
 347   mDissolveEffect = Dali::Toolkit::CreateDissolveEffect(mUseHighPrecision);
 348   if(mUseHighPrecision)
 349   {
 350     mTitleActor.SetProperty( TextLabel::Property::TEXT, std::string(APPLICATION_TITLE_HIGHP) );
 351     mEffectChangeButton.SetButtonImage( mIconHighP );
 352     mEffectChangeButton.SetSelectedImage( mIconHighPSelected );
 353   }
 354   else
 355   {
 356     mTitleActor.SetProperty( TextLabel::Property::TEXT, std::string(APPLICATION_TITLE_MEDIUMP) );
 357     mEffectChangeButton.SetButtonImage( mIconMediumP );
 358     mEffectChangeButton.SetSelectedImage( mIconMediumPSelected );
 359   }
 360
 361   return true;
 362 }
 363
 364 bool DissolveEffectApp::OnSildeshowButtonClicked( Toolkit::Button button )
 365 {
 366   mSlideshow = !mSlideshow;
 367   if( mSlideshow )
 368   {
 369     mPlayStopButton.SetButtonImage( mIconStop );
 370     mPlayStopButton.SetSelectedImage( mIconStopSelected );
 371     mPanGestureDetector.Detach( mParent );
 372     mViewTimer.Start();
 373     mTimerReady = false;
 374   }
 375   else
 376   {
 377     mPlayStopButton.SetButtonImage( mIconPlay );
 378     mPlayStopButton.SetSelectedImage( mIconPlaySelected );
 379     mTimerReady = true;
 380     mPanGestureDetector.Attach( mParent );
 381   }
 382   return true;
 383 }
 384
 385 void DissolveEffectApp::OnTransitionCompleted( Animation& source )
 386 {
 387   mNextImage.SetProperty( Toolkit::ImageView::Property::IMAGE, mEmptyEffect );
 388   mParent.Remove( mCurrentImage );
 389   mPanGestureDetector.Detach( mCurrentImage );
 390   mCurrentImage = mNextImage;
 391   mPanGestureDetector.Attach( mCurrentImage );
 392   mIsTransiting = false;
 393
 394   if( mSlideshow)
 395   {
 396     mViewTimer.Start();
 397     mTimerReady = false;
 398   }
 399 }
 400
 401 bool DissolveEffectApp::OnTimerTick()
 402 {
 403   mTimerReady = true;
 404   if(mSlideshow)
 405   {
 406     mIndex = (mIndex + 1)%NUM_IMAGES;
 407     Image image = LoadStageFillingImage( IMAGES[ mIndex ] );
 408     mNextImage = Toolkit::ImageView::New( image );
 409     mNextImage.SetParentOrigin( ParentOrigin::CENTER );
 410     mNextImage.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 411     mNextImage.SetSizeScalePolicy( SizeScalePolicy::FIT_WITH_ASPECT_RATIO );
 412     mNextImage.SetZ(INITIAL_DEPTH);
 413     mParent.Add( mNextImage );
 414     switch( mCentralLineIndex%4 )
 415     {
 416       case 0:
 417       {
 418         StartTransition(Vector2(1.0f,0.5f), Vector2(-1.0f, 0.0f));
 419         break;
 420       }
 421       case 1:
 422       {
 423         StartTransition(Vector2(0.5f,0.0f), Vector2(0.0f, 1.0f));
 424         break;
 425       }
 426       case 2:
 427       {
 428         StartTransition(Vector2(0.0f,0.5f), Vector2(1.0f, 0.0f));
 429         break;
 430       }
 431       default:
 432       {
 433         StartTransition(Vector2(0.5f,1.0f), Vector2(0.0f, -1.0f));
 434         break;
 435       }
 436
 437     }
 438     mCentralLineIndex++;
 439   }
 440   return false;   //return false to stop the timer
 441 }
 442
 443 // Entry point for Linux & Tizen applications
 444 int DALI_EXPORT_API main( int argc, char **argv )
 445 {
 446   Application application = Application::New( &argc, &argv, DEMO_THEME_PATH );
 447   DissolveEffectApp test( application );
 448   application.MainLoop();
 449
 450   return 0;
 451 }