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( DALI_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( DALI_IMAGE_DIR "icon-highp.png" );
  40 const char * const EFFECT_HIGHP_IMAGE_SELECTED( DALI_IMAGE_DIR "icon-highp-selected.png" );
  41 const char * const EFFECT_MEDIUMP_IMAGE( DALI_IMAGE_DIR "icon-mediump.png" );
  42 const char * const EFFECT_MEDIUMP_IMAGE_SELECTED( DALI_IMAGE_DIR "icon-mediump-selected.png" );
  43 const char * const PLAY_ICON( DALI_IMAGE_DIR "icon-play.png" );
  44 const char * const PLAY_ICON_SELECTED( DALI_IMAGE_DIR "icon-play-selected.png" );
  45 const char * const STOP_ICON( DALI_IMAGE_DIR "icon-stop.png" );
  46 const char * const STOP_ICON_SELECTED( DALI_IMAGE_DIR "icon-stop-selected.png" );
  47
  48 const char* IMAGES[] =
  49 {
  50   DALI_IMAGE_DIR "gallery-large-1.jpg",
  51   DALI_IMAGE_DIR "gallery-large-2.jpg",
  52   DALI_IMAGE_DIR "gallery-large-3.jpg",
  53   DALI_IMAGE_DIR "gallery-large-4.jpg",
  54   DALI_IMAGE_DIR "gallery-large-5.jpg",
  55   DALI_IMAGE_DIR "gallery-large-6.jpg",
  56   DALI_IMAGE_DIR "gallery-large-7.jpg",
  57   DALI_IMAGE_DIR "gallery-large-8.jpg",
  58   DALI_IMAGE_DIR "gallery-large-9.jpg",
  59   DALI_IMAGE_DIR "gallery-large-10.jpg",
  60   DALI_IMAGE_DIR "gallery-large-11.jpg",
  61   DALI_IMAGE_DIR "gallery-large-12.jpg",
  62   DALI_IMAGE_DIR "gallery-large-13.jpg",
  63   DALI_IMAGE_DIR "gallery-large-14.jpg",
  64   DALI_IMAGE_DIR "gallery-large-15.jpg",
  65   DALI_IMAGE_DIR "gallery-large-16.jpg",
  66   DALI_IMAGE_DIR "gallery-large-17.jpg",
  67   DALI_IMAGE_DIR "gallery-large-18.jpg",
  68   DALI_IMAGE_DIR "gallery-large-19.jpg",
  69   DALI_IMAGE_DIR "gallery-large-20.jpg",
  70   DALI_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   ImageActor                      mCurrentImage;
 167   ImageActor                      mNextImage;
 168   unsigned int                    mIndex;
 169
 170   ShaderEffect                    mCurrentImageEffect;
 171   ShaderEffect                    mNextImageEffect;
 172   bool                            mUseHighPrecision;
 173   Animation                       mAnimation;
 174
 175   PanGestureDetector              mPanGestureDetector;
 176   bool                            mIsTransiting;
 177
 178   bool                            mSlideshow;
 179   Timer                           mViewTimer;
 180   bool                            mTimerReady;
 181   unsigned int                    mCentralLineIndex;
 182
 183   Toolkit::PushButton             mPlayStopButton;
 184
 185   Toolkit::PushButton             mEffectChangeButton;
 186 };
 187
 188 DissolveEffectApp::DissolveEffectApp( Application& application )
 189 : mApplication( application ),
 190   mIndex( 0 ),
 191   mUseHighPrecision(true),
 192   mIsTransiting( false ),
 193   mSlideshow( false ),
 194   mTimerReady( false ),
 195   mCentralLineIndex( 0 )
 196 {
 197   mApplication.InitSignal().Connect( this, &DissolveEffectApp::OnInit );
 198 }
 199
 200 DissolveEffectApp::~DissolveEffectApp()
 201 {
 202   //Nothing to do
 203 }
 204
 205 void DissolveEffectApp::OnInit( Application& application )
 206 {
 207   Stage::GetCurrent().KeyEventSignal().Connect(this, &DissolveEffectApp::OnKeyEvent);
 208
 209   // Creates a default view with a default tool bar, the view is added to the stage.
 210   mContent = DemoHelper::CreateView( application, mView,mToolBar, "", TOOLBAR_IMAGE, "" );
 211
 212   // Add an effect-changing button on the right of the tool bar.
 213   mEffectChangeButton = Toolkit::PushButton::New();
 214   mEffectChangeButton.SetUnselectedImage( EFFECT_HIGHP_IMAGE );
 215   mEffectChangeButton.SetSelectedImage( EFFECT_HIGHP_IMAGE_SELECTED );
 216   mEffectChangeButton.ClickedSignal().Connect( this, &DissolveEffectApp::OnEffectButtonClicked );
 217   mToolBar.AddControl( mEffectChangeButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalRight, DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
 218
 219   // Add title to the tool bar.
 220   mTitleActor = DemoHelper::CreateToolBarLabel( APPLICATION_TITLE_HIGHP );
 221   mToolBar.AddControl( mTitleActor, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarTitlePercentage, Toolkit::Alignment::HorizontalCenter );
 222
 223   // Add an slide-show button on the right of the title
 224   mPlayStopButton = Toolkit::PushButton::New();
 225   mPlayStopButton.SetUnselectedImage( PLAY_ICON );
 226   mPlayStopButton.SetSelectedImage( PLAY_ICON_SELECTED );
 227   mPlayStopButton.ClickedSignal().Connect( this, &DissolveEffectApp::OnSildeshowButtonClicked );
 228   mToolBar.AddControl( mPlayStopButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalCenter, DemoHelper::DEFAULT_PLAY_PADDING );
 229
 230   // use pan gesture to detect the cursor or finger movement
 231   mPanGestureDetector = PanGestureDetector::New();
 232   mPanGestureDetector.DetectedSignal().Connect( this, &DissolveEffectApp::OnPanGesture );
 233
 234   // create the dissolve effect object
 235   mCurrentImageEffect = Toolkit::CreateDissolveEffect(mUseHighPrecision);
 236   mNextImageEffect = Toolkit::CreateDissolveEffect(mUseHighPrecision);
 237
 238   mViewTimer = Timer::New( VIEWINGTIME );
 239   mViewTimer.TickSignal().Connect( this, &DissolveEffectApp::OnTimerTick );
 240   mTimerReady = true;
 241
 242   // Set size to stage size to avoid seeing a black border on transition
 243   mParent = Actor::New();
 244   mParent.SetSize( Stage::GetCurrent().GetSize() );
 245   mParent.SetPositionInheritanceMode( USE_PARENT_POSITION );
 246   mContent.Add( mParent );
 247
 248   // show the first image
 249   mCurrentImage = ImageActor::New( LoadStageFillingImage( IMAGES[mIndex] ) );
 250   mCurrentImage.SetPositionInheritanceMode(USE_PARENT_POSITION_PLUS_LOCAL_POSITION);
 251   mCurrentImage.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 252   mCurrentImage.SetSizeScalePolicy( SizeScalePolicy::FIT_WITH_ASPECT_RATIO );
 253   mParent.Add( mCurrentImage );
 254
 255   mPanGestureDetector.Attach( mCurrentImage );
 256 }
 257
 258 // signal handler, called when the pan gesture is detected
 259 void DissolveEffectApp::OnPanGesture( Actor actor, const PanGesture& gesture )
 260 {
 261   // does not response when the animation has not finished
 262   if( mIsTransiting || mSlideshow )
 263   {
 264     return;
 265   }
 266
 267   if( gesture.state == Gesture::Continuing )
 268   {
 269     if( gesture.displacement.x < 0)
 270     {
 271       mIndex = (mIndex + 1)%NUM_IMAGES;
 272     }
 273     else
 274     {
 275       mIndex = (mIndex + NUM_IMAGES -1)%NUM_IMAGES;
 276     }
 277
 278     Image image = LoadStageFillingImage( IMAGES[ mIndex ] );
 279     mNextImage = ImageActor::New( image );
 280     mNextImage.SetPositionInheritanceMode(USE_PARENT_POSITION_PLUS_LOCAL_POSITION);
 281     mNextImage.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 282     mNextImage.SetSizeScalePolicy( SizeScalePolicy::FIT_WITH_ASPECT_RATIO );
 283     mNextImage.SetZ(INITIAL_DEPTH);
 284     mParent.Add( mNextImage );
 285     Vector2 size = Vector2( mCurrentImage.GetCurrentSize() );
 286     StartTransition( gesture.position / size, gesture.displacement * Vector2(1.0, size.x/size.y));
 287   }
 288 }
 289
 290 void DissolveEffectApp::StartTransition(Vector2 position, Vector2 displacement)
 291 {
 292   mAnimation = Animation::New(TRANSITION_DURATION);
 293
 294   Dali::Toolkit::DissolveEffectSetCentralLine( mCurrentImageEffect, position, displacement );
 295   mCurrentImageEffect.SetUniform("uPercentage", 0.0f);
 296   mCurrentImage.SetShaderEffect(mCurrentImageEffect);
 297   mAnimation.AnimateTo( Property(mCurrentImageEffect, "uPercentage"), 1.0f, AlphaFunction::LINEAR );
 298
 299   mNextImage.SetOpacity(0.0f);
 300   mAnimation.AnimateTo( Property( mNextImage, Actor::Property::COLOR_ALPHA ), 1.0f, AlphaFunction::LINEAR );
 301
 302   if(mUseHighPrecision)
 303   {
 304     Dali::Toolkit::DissolveEffectSetCentralLine( mNextImageEffect, position, displacement );
 305     mNextImageEffect.SetUniform("uPercentage", 1.0f);
 306     mNextImage.SetShaderEffect(mNextImageEffect);
 307     mAnimation.AnimateTo( Property(mNextImageEffect, "uPercentage"), 0.0f, AlphaFunction::LINEAR );
 308   }
 309   else
 310   {
 311     mAnimation.AnimateTo( Property( mNextImage, Actor::Property::POSITION ), Vector3( 0.0f, 0.0f, 0.0f ), AlphaFunction::LINEAR );
 312   }
 313
 314   mAnimation.FinishedSignal().Connect( this, &DissolveEffectApp::OnTransitionCompleted );
 315   mAnimation.Play();
 316   mIsTransiting = true;
 317 }
 318
 319 void DissolveEffectApp::OnKeyEvent(const KeyEvent& event)
 320 {
 321   if(event.state == KeyEvent::Down)
 322   {
 323     if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 324     {
 325       mApplication.Quit();
 326     }
 327   }
 328 }
 329
 330 bool DissolveEffectApp::OnEffectButtonClicked( Toolkit::Button button )
 331 {
 332   mUseHighPrecision = !mUseHighPrecision;
 333   mCurrentImageEffect = Dali::Toolkit::CreateDissolveEffect(mUseHighPrecision);
 334   if(mUseHighPrecision)
 335   {
 336     mTitleActor.SetProperty( TextLabel::Property::TEXT, std::string(APPLICATION_TITLE_HIGHP) );
 337     mEffectChangeButton.SetUnselectedImage( EFFECT_HIGHP_IMAGE );
 338     mEffectChangeButton.SetSelectedImage( EFFECT_HIGHP_IMAGE_SELECTED );
 339   }
 340   else
 341   {
 342     mTitleActor.SetProperty( TextLabel::Property::TEXT, std::string(APPLICATION_TITLE_MEDIUMP) );
 343     mEffectChangeButton.SetUnselectedImage( EFFECT_MEDIUMP_IMAGE );
 344     mEffectChangeButton.SetSelectedImage( EFFECT_MEDIUMP_IMAGE_SELECTED );
 345   }
 346
 347   return true;
 348 }
 349
 350 bool DissolveEffectApp::OnSildeshowButtonClicked( Toolkit::Button button )
 351 {
 352   mSlideshow = !mSlideshow;
 353   if( mSlideshow )
 354   {
 355     mPlayStopButton.SetUnselectedImage( STOP_ICON );
 356     mPlayStopButton.SetSelectedImage( STOP_ICON_SELECTED );
 357     mPanGestureDetector.Detach( mParent );
 358     mViewTimer.Start();
 359     mTimerReady = false;
 360   }
 361   else
 362   {
 363     mPlayStopButton.SetUnselectedImage( PLAY_ICON );
 364     mPlayStopButton.SetSelectedImage( PLAY_ICON_SELECTED );
 365     mTimerReady = true;
 366     mPanGestureDetector.Attach( mParent );
 367   }
 368   return true;
 369 }
 370
 371 void DissolveEffectApp::OnTransitionCompleted( Animation& source )
 372 {
 373   mCurrentImage.RemoveShaderEffect();
 374   mNextImage.RemoveShaderEffect();
 375   mParent.Remove( mCurrentImage );
 376   mPanGestureDetector.Detach( mCurrentImage );
 377   mCurrentImage = mNextImage;
 378   mPanGestureDetector.Attach( mCurrentImage );
 379   mIsTransiting = false;
 380
 381   if( mSlideshow)
 382   {
 383     mViewTimer.Start();
 384     mTimerReady = false;
 385   }
 386 }
 387
 388 bool DissolveEffectApp::OnTimerTick()
 389 {
 390   mTimerReady = true;
 391   if(mSlideshow)
 392   {
 393     mIndex = (mIndex + 1)%NUM_IMAGES;
 394     Image image = LoadStageFillingImage( IMAGES[ mIndex ] );
 395     mNextImage = ImageActor::New( image );
 396     mNextImage.SetPositionInheritanceMode(USE_PARENT_POSITION_PLUS_LOCAL_POSITION);
 397     mNextImage.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 398     mNextImage.SetSizeScalePolicy( SizeScalePolicy::FIT_WITH_ASPECT_RATIO );
 399     mNextImage.SetZ(INITIAL_DEPTH);
 400     mParent.Add( mNextImage );
 401     switch( mCentralLineIndex%4 )
 402     {
 403       case 0:
 404       {
 405         StartTransition(Vector2(1.0f,0.5f), Vector2(-1.0f, 0.0f));
 406         break;
 407       }
 408       case 1:
 409       {
 410         StartTransition(Vector2(0.5f,0.0f), Vector2(0.0f, 1.0f));
 411         break;
 412       }
 413       case 2:
 414       {
 415         StartTransition(Vector2(0.0f,0.5f), Vector2(1.0f, 0.0f));
 416         break;
 417       }
 418       default:
 419       {
 420         StartTransition(Vector2(0.5f,1.0f), Vector2(0.0f, -1.0f));
 421         break;
 422       }
 423
 424     }
 425     mCentralLineIndex++;
 426   }
 427   return false;   //return false to stop the timer
 428 }
 429
 430 // Entry point for Linux & Tizen applications
 431 int main( int argc, char **argv )
 432 {
 433   Application application = Application::New( &argc, &argv, DALI_DEMO_THEME_PATH );
 434   DissolveEffectApp test( application );
 435   application.MainLoop();
 436
 437   return 0;
 438 }