examples/perf-scroll/perf-scroll.cpp

   1 /*
   2  * Copyright (c) 2020 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 <dali-toolkit/dali-toolkit.h>
  19 #include <dali-toolkit/devel-api/visuals/visual-properties-devel.h>
  20 #include "shared/utility.h"
  21
  22 using namespace Dali;
  23 using namespace Dali::Toolkit;
  24
  25
  26 namespace
  27 {
  28 const char* IMAGE_PATH[] = {
  29                             DEMO_IMAGE_DIR "gallery-medium-1.jpg",
  30                             DEMO_IMAGE_DIR "gallery-medium-2.jpg",
  31                             DEMO_IMAGE_DIR "gallery-medium-3.jpg",
  32                             DEMO_IMAGE_DIR "gallery-medium-4.jpg",
  33                             DEMO_IMAGE_DIR "gallery-medium-5.jpg",
  34                             DEMO_IMAGE_DIR "gallery-medium-6.jpg",
  35                             DEMO_IMAGE_DIR "gallery-medium-7.jpg",
  36                             DEMO_IMAGE_DIR "gallery-medium-8.jpg",
  37                             DEMO_IMAGE_DIR "gallery-medium-9.jpg",
  38                             DEMO_IMAGE_DIR "gallery-medium-10.jpg",
  39                             DEMO_IMAGE_DIR "gallery-medium-11.jpg",
  40                             DEMO_IMAGE_DIR "gallery-medium-12.jpg",
  41                             DEMO_IMAGE_DIR "gallery-medium-13.jpg",
  42                             DEMO_IMAGE_DIR "gallery-medium-14.jpg",
  43                             DEMO_IMAGE_DIR "gallery-medium-15.jpg",
  44                             DEMO_IMAGE_DIR "gallery-medium-16.jpg",
  45                             DEMO_IMAGE_DIR "gallery-medium-17.jpg",
  46                             DEMO_IMAGE_DIR "gallery-medium-18.jpg",
  47                             DEMO_IMAGE_DIR "gallery-medium-19.jpg",
  48                             DEMO_IMAGE_DIR "gallery-medium-20.jpg",
  49                             DEMO_IMAGE_DIR "gallery-medium-21.jpg",
  50                             DEMO_IMAGE_DIR "gallery-medium-22.jpg",
  51                             DEMO_IMAGE_DIR "gallery-medium-23.jpg",
  52                             DEMO_IMAGE_DIR "gallery-medium-24.jpg",
  53                             DEMO_IMAGE_DIR "gallery-medium-25.jpg",
  54                             DEMO_IMAGE_DIR "gallery-medium-26.jpg",
  55                             DEMO_IMAGE_DIR "gallery-medium-27.jpg",
  56                             DEMO_IMAGE_DIR "gallery-medium-28.jpg",
  57                             DEMO_IMAGE_DIR "gallery-medium-29.jpg",
  58                             DEMO_IMAGE_DIR "gallery-medium-30.jpg",
  59                             DEMO_IMAGE_DIR "gallery-medium-31.jpg",
  60                             DEMO_IMAGE_DIR "gallery-medium-32.jpg",
  61                             DEMO_IMAGE_DIR "gallery-medium-33.jpg",
  62                             DEMO_IMAGE_DIR "gallery-medium-34.jpg",
  63                             DEMO_IMAGE_DIR "gallery-medium-35.jpg",
  64                             DEMO_IMAGE_DIR "gallery-medium-36.jpg",
  65                             DEMO_IMAGE_DIR "gallery-medium-37.jpg",
  66                             DEMO_IMAGE_DIR "gallery-medium-38.jpg",
  67                             DEMO_IMAGE_DIR "gallery-medium-39.jpg",
  68                             DEMO_IMAGE_DIR "gallery-medium-40.jpg",
  69                             DEMO_IMAGE_DIR "gallery-medium-41.jpg",
  70                             DEMO_IMAGE_DIR "gallery-medium-42.jpg",
  71                             DEMO_IMAGE_DIR "gallery-medium-43.jpg",
  72                             DEMO_IMAGE_DIR "gallery-medium-44.jpg",
  73                             DEMO_IMAGE_DIR "gallery-medium-45.jpg",
  74                             DEMO_IMAGE_DIR "gallery-medium-46.jpg",
  75                             DEMO_IMAGE_DIR "gallery-medium-47.jpg",
  76                             DEMO_IMAGE_DIR "gallery-medium-48.jpg",
  77                             DEMO_IMAGE_DIR "gallery-medium-49.jpg",
  78                             DEMO_IMAGE_DIR "gallery-medium-50.jpg",
  79                             DEMO_IMAGE_DIR "gallery-medium-51.jpg",
  80                             DEMO_IMAGE_DIR "gallery-medium-52.jpg",
  81                             DEMO_IMAGE_DIR "gallery-medium-53.jpg",
  82 };
  83
  84 const char* NINEPATCH_IMAGE_PATH[] = {
  85                             DEMO_IMAGE_DIR "selection-popup-bg.1.9.png",
  86                             DEMO_IMAGE_DIR "selection-popup-bg.2.9.png",
  87                             DEMO_IMAGE_DIR "selection-popup-bg.3.9.png",
  88                             DEMO_IMAGE_DIR "selection-popup-bg.4.9.png",
  89                             DEMO_IMAGE_DIR "selection-popup-bg.5.9.png",
  90                             DEMO_IMAGE_DIR "selection-popup-bg.6.9.png",
  91                             DEMO_IMAGE_DIR "selection-popup-bg.7.9.png",
  92                             DEMO_IMAGE_DIR "selection-popup-bg.8.9.png",
  93                             DEMO_IMAGE_DIR "selection-popup-bg.9.9.png",
  94                             DEMO_IMAGE_DIR "selection-popup-bg.10.9.png",
  95                             DEMO_IMAGE_DIR "selection-popup-bg.11.9.png",
  96                             DEMO_IMAGE_DIR "selection-popup-bg.12.9.png",
  97                             DEMO_IMAGE_DIR "selection-popup-bg.13.9.png",
  98                             DEMO_IMAGE_DIR "selection-popup-bg.14.9.png",
  99                             DEMO_IMAGE_DIR "selection-popup-bg.15.9.png",
 100                             DEMO_IMAGE_DIR "selection-popup-bg.16.9.png",
 101                             DEMO_IMAGE_DIR "selection-popup-bg.17.9.png",
 102                             DEMO_IMAGE_DIR "selection-popup-bg.18.9.png",
 103                             DEMO_IMAGE_DIR "selection-popup-bg.19.9.png",
 104                             DEMO_IMAGE_DIR "selection-popup-bg.20.9.png",
 105                             DEMO_IMAGE_DIR "selection-popup-bg.21.9.png",
 106                             DEMO_IMAGE_DIR "selection-popup-bg.22.9.png",
 107                             DEMO_IMAGE_DIR "selection-popup-bg.23.9.png",
 108                             DEMO_IMAGE_DIR "selection-popup-bg.24.9.png",
 109                             DEMO_IMAGE_DIR "selection-popup-bg.25.9.png",
 110                             DEMO_IMAGE_DIR "selection-popup-bg.26.9.png",
 111                             DEMO_IMAGE_DIR "selection-popup-bg.27.9.png",
 112                             DEMO_IMAGE_DIR "selection-popup-bg.28.9.png",
 113                             DEMO_IMAGE_DIR "selection-popup-bg.29.9.png",
 114                             DEMO_IMAGE_DIR "selection-popup-bg.30.9.png",
 115                             DEMO_IMAGE_DIR "selection-popup-bg.31.9.png",
 116                             DEMO_IMAGE_DIR "selection-popup-bg.32.9.png",
 117                             DEMO_IMAGE_DIR "selection-popup-bg.33.9.png",
 118                             DEMO_IMAGE_DIR "button-disabled.9.png",
 119                             DEMO_IMAGE_DIR "button-down.9.png",
 120                             DEMO_IMAGE_DIR "button-down-disabled.9.png",
 121                             DEMO_IMAGE_DIR "button-up-1.9.png",
 122                             DEMO_IMAGE_DIR "button-up-2.9.png",
 123                             DEMO_IMAGE_DIR "button-up-3.9.png",
 124                             DEMO_IMAGE_DIR "button-up-4.9.png",
 125                             DEMO_IMAGE_DIR "button-up-5.9.png",
 126                             DEMO_IMAGE_DIR "button-up-6.9.png",
 127                             DEMO_IMAGE_DIR "button-up-7.9.png",
 128                             DEMO_IMAGE_DIR "button-up-8.9.png",
 129                             DEMO_IMAGE_DIR "button-up-9.9.png",
 130                             DEMO_IMAGE_DIR "button-up-10.9.png",
 131                             DEMO_IMAGE_DIR "button-up-11.9.png",
 132                             DEMO_IMAGE_DIR "button-up-12.9.png",
 133                             DEMO_IMAGE_DIR "button-up-13.9.png",
 134                             DEMO_IMAGE_DIR "button-up-14.9.png",
 135                             DEMO_IMAGE_DIR "button-up-15.9.png",
 136                             DEMO_IMAGE_DIR "button-up-16.9.png",
 137                             DEMO_IMAGE_DIR "button-up-17.9.png",
 138 };
 139
 140 const unsigned int NUM_IMAGES = sizeof(IMAGE_PATH) / sizeof(char*);
 141 const unsigned int NUM_NINEPATCH_IMAGES = sizeof(NINEPATCH_IMAGE_PATH) / sizeof(char*);
 142
 143 const float ANIMATION_TIME ( 5.0f ); // animation length in seconds
 144
 145 struct VertexWithTexture
 146 {
 147   Vector2 position;
 148   Vector2 texCoord;
 149 };
 150
 151 const char* VERTEX_SHADER_TEXTURE = DALI_COMPOSE_SHADER(
 152     attribute mediump vec2 aPosition;\n
 153     attribute mediump vec2 aTexCoord;\n
 154     uniform mediump mat4 uMvpMatrix;\n
 155     uniform mediump vec3 uSize;\n
 156     varying mediump vec2 vTexCoord;\n
 157     void main()\n
 158     {\n
 159       vec4 position = vec4(aPosition,0.0,1.0)*vec4(uSize,1.0);\n
 160       gl_Position = uMvpMatrix * position;\n
 161       vTexCoord = aTexCoord;\n
 162     }\n
 163 );
 164
 165 const char* FRAGMENT_SHADER_TEXTURE = DALI_COMPOSE_SHADER(
 166     uniform lowp vec4 uColor;\n
 167     uniform sampler2D sTexture;\n
 168     varying mediump vec2 vTexCoord;\n
 169
 170     void main()\n
 171     {\n
 172       gl_FragColor = texture2D( sTexture, vTexCoord ) * uColor;\n
 173     }\n
 174 );
 175
 176 bool gUseMesh(false);
 177 bool gNinePatch(false);
 178 unsigned int gRowsPerPage(15);
 179 unsigned int gColumnsPerPage(15);
 180 unsigned int gPageCount(10);
 181 float gDuration(10.0f);
 182
 183 Renderer CreateRenderer( unsigned int index, Geometry geometry, Shader shader )
 184 {
 185   Renderer renderer = Renderer::New( geometry, shader );
 186   const char* imagePath = !gNinePatch ? IMAGE_PATH[index] : NINEPATCH_IMAGE_PATH[index];
 187   Texture texture = DemoHelper::LoadTexture( imagePath );
 188   TextureSet textureSet = TextureSet::New();
 189   textureSet.SetTexture( 0u, texture );
 190   renderer.SetTextures( textureSet );
 191   renderer.SetProperty( Renderer::Property::BLEND_MODE, BlendMode::OFF );
 192   return renderer;
 193 }
 194
 195
 196 }
 197 // Test application to compare performance between ImageActor and ImageView
 198 // By default, the application consist of 10 pages of 25x25 ImageActors, this can be modified using the following command line arguments:
 199 // -t duration (sec )
 200 // --use-imageview ( Use ImageView instead of ImageActor )
 201 // --use-mesh ( Use new renderer API (as ImageView) but shares renderers between actors when possible )
 202
 203 //
 204 class PerfScroll : public ConnectionTracker
 205 {
 206 public:
 207
 208   PerfScroll( Application& application )
 209   : mApplication( application ),
 210   mRowsPerPage( gRowsPerPage ),
 211   mColumnsPerPage( gColumnsPerPage ),
 212   mPageCount( gPageCount )
 213   {
 214     // Connect to the Application's Init signal
 215     mApplication.InitSignal().Connect( this, &PerfScroll::Create );
 216   }
 217
 218   ~PerfScroll()
 219   {
 220     // Nothing to do here;
 221   }
 222
 223   // The Init signal is received once (only) during the Application lifetime
 224   void Create( Application& application )
 225   {
 226     // Get a handle to the window
 227     Window window = application.GetWindow();
 228     window.SetBackgroundColor( Color::WHITE );
 229     Vector2 windowSize = window.GetSize();
 230
 231     window.GetRootLayer().SetProperty( Layer::Property::DEPTH_TEST, false );
 232
 233     mSize = Vector3( windowSize.x / mColumnsPerPage, windowSize.y / mRowsPerPage, 0.0f );
 234
 235     // Respond to a click anywhere on the window
 236     window.GetRootLayer().TouchSignal().Connect( this, &PerfScroll::OnTouch );
 237
 238     // Respond to key events
 239     window.KeyEventSignal().Connect( this, &PerfScroll::OnKeyEvent );
 240
 241     mParent = Actor::New();
 242     mParent.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT );
 243     window.Add(mParent);
 244
 245     if( gUseMesh )
 246     {
 247       CreateMeshActors();
 248     }
 249     else
 250     {
 251       CreateImageViews();
 252     }
 253
 254     ShowAnimation();
 255   }
 256
 257   bool OnTouch( Actor actor, const TouchEvent& touch )
 258   {
 259     // quit the application
 260     mApplication.Quit();
 261     return true;
 262   }
 263
 264   const char* ImagePath( int i )
 265   {
 266     return !gNinePatch ? IMAGE_PATH[i % NUM_IMAGES] : NINEPATCH_IMAGE_PATH[i % NUM_NINEPATCH_IMAGES];
 267   }
 268
 269   void CreateImageViews()
 270   {
 271     Window window = mApplication.GetWindow();
 272     unsigned int actorCount( mRowsPerPage*mColumnsPerPage * mPageCount );
 273     mImageView.resize( actorCount );
 274
 275     for( size_t i(0); i<actorCount; ++i )
 276     {
 277       mImageView[i] = ImageView::New();
 278       Property::Map propertyMap;
 279       propertyMap.Insert(Toolkit::ImageVisual::Property::URL, ImagePath(i));
 280       propertyMap.Insert(Toolkit::Visual::Property::TYPE, Toolkit::Visual::IMAGE);
 281       propertyMap.Insert(Toolkit::DevelVisual::Property::VISUAL_FITTING_MODE, Toolkit::DevelVisual::FILL);
 282       mImageView[i].SetProperty(Toolkit::ImageView::Property::IMAGE, propertyMap);
 283
 284       mImageView[i].SetProperty( Actor::Property::SIZE, Vector3(0.0f,0.0f,0.0f) );
 285       mImageView[i].SetResizePolicy( ResizePolicy::FIXED, Dimension::ALL_DIMENSIONS );
 286       mParent.Add( mImageView[i] );
 287     }
 288   }
 289
 290   void CreateMeshActors()
 291   {
 292     unsigned int numImages = !gNinePatch ? NUM_IMAGES : NUM_NINEPATCH_IMAGES;
 293
 294     //Create all the renderers
 295     std::vector<Renderer> renderers( numImages );
 296     Shader shader = Shader::New( VERTEX_SHADER_TEXTURE, FRAGMENT_SHADER_TEXTURE );
 297     Geometry geometry = DemoHelper::CreateTexturedQuad();
 298     for( unsigned int i(0); i<numImages; ++i )
 299     {
 300       renderers[i] = CreateRenderer( i, geometry, shader );
 301     }
 302
 303     //Create the actors
 304     Window window = mApplication.GetWindow();
 305     unsigned int actorCount(mRowsPerPage*mColumnsPerPage * mPageCount);
 306     mActor.resize(actorCount);
 307     for( size_t i(0); i<actorCount; ++i )
 308     {
 309       mActor[i] = Actor::New();
 310       mActor[i].AddRenderer( renderers[i % numImages] );
 311       mActor[i].SetProperty( Actor::Property::SIZE, Vector3(0.0f,0.0f,0.0f) );
 312       mParent.Add(mActor[i]);
 313     }
 314   }
 315
 316   void OnAnimationEnd( Animation& source )
 317   {
 318     if( source == mShow )
 319     {
 320       ScrollAnimation();
 321     }
 322     else if( source == mScroll )
 323     {
 324       HideAnimation();
 325     }
 326     else
 327     {
 328       mApplication.Quit();
 329     }
 330   }
 331
 332   void ShowAnimation()
 333   {
 334     Window window = mApplication.GetWindow();
 335     Vector3 initialPosition( window.GetSize().GetWidth() * 0.5f, window.GetSize().GetHeight() * 0.5f, 1000.0f );
 336
 337     unsigned int totalColumns = mColumnsPerPage * mPageCount;
 338
 339     size_t count(0);
 340     float xpos, ypos;
 341     mShow = Animation::New( 0.0f );
 342
 343     float totalDuration( 0.0f );
 344     float durationPerActor( 0.0f );
 345     float delayBetweenActors = ( totalDuration - durationPerActor ) / ( mRowsPerPage * mColumnsPerPage );
 346
 347     for( size_t i(0); i<totalColumns; ++i )
 348     {
 349       xpos = mSize.x * i;
 350
 351       for( size_t j(0); j<mRowsPerPage; ++j )
 352       {
 353
 354         ypos = mSize.y * j;
 355
 356         float delay = 0.0f;
 357         float duration = 0.0f;
 358         if( count < ( static_cast< size_t >( mRowsPerPage ) * mColumnsPerPage ) )
 359         {
 360           duration = durationPerActor;
 361           delay = delayBetweenActors * count;
 362         }
 363         if( gUseMesh )
 364         {
 365           mActor[count].SetProperty( Actor::Property::POSITION, initialPosition );
 366           mActor[count].SetProperty( Actor::Property::SIZE, Vector3(0.0f,0.0f,0.0f) );
 367           mActor[count].SetProperty( Actor::Property::ORIENTATION, Quaternion( Quaternion( Radian( 0.0f ), Vector3::XAXIS ) ) );
 368           mShow.AnimateTo( Property( mActor[count], Actor::Property::POSITION ), Vector3( xpos+mSize.x*0.5f, ypos+mSize.y*0.5f, 0.0f), AlphaFunction::EASE_OUT_BACK, TimePeriod( delay, duration ) );
 369           mShow.AnimateTo( Property( mActor[count], Actor::Property::SIZE ), mSize, AlphaFunction::EASE_OUT_BACK, TimePeriod( delay, duration ) );
 370         }
 371         else
 372         {
 373           mImageView[count].SetProperty( Actor::Property::POSITION, initialPosition );
 374           mImageView[count].SetProperty( Actor::Property::SIZE, Vector3(0.0f,0.0f,0.0f) );
 375           mImageView[count].SetProperty( Actor::Property::ORIENTATION, Quaternion( Quaternion( Radian(0.0f), Vector3::XAXIS ) ) );
 376           mShow.AnimateTo( Property( mImageView[count], Actor::Property::POSITION ), Vector3( xpos+mSize.x*0.5f, ypos+mSize.y*0.5f, 0.0f ), AlphaFunction::EASE_OUT_BACK, TimePeriod( delay, duration ) );
 377           mShow.AnimateTo( Property( mImageView[count], Actor::Property::SIZE ), mSize, AlphaFunction::EASE_OUT_BACK, TimePeriod( delay, duration ) );
 378         }
 379         ++count;
 380       }
 381     }
 382     mShow.Play();
 383     mShow.FinishedSignal().Connect( this, &PerfScroll::OnAnimationEnd );
 384   }
 385
 386   void ScrollAnimation()
 387   {
 388     Window window = mApplication.GetWindow();
 389     Vector3 windowSize( window.GetSize() );
 390
 391     mScroll = Animation::New( gDuration );
 392
 393     mScroll.AnimateBy( Property( mParent, Actor::Property::POSITION ), Vector3( -(gPageCount-1.)*windowSize.x,0.0f, 0.0f) );
 394     mScroll.Play();
 395     mScroll.FinishedSignal().Connect( this, &PerfScroll::OnAnimationEnd );
 396   }
 397
 398   void HideAnimation()
 399   {
 400     size_t count(0);
 401     unsigned int actorsPerPage( mRowsPerPage*mColumnsPerPage );
 402     mHide = Animation::New( 0.0f );
 403
 404     unsigned int totalColumns = mColumnsPerPage * mPageCount;
 405
 406     float totalDuration( 0.0f );
 407     float durationPerActor( 0.0f );
 408     float delayBetweenActors = ( totalDuration - durationPerActor ) / ( mRowsPerPage * mColumnsPerPage );
 409     for( size_t i(0); i<mRowsPerPage; ++i )
 410     {
 411       for( size_t j(0); j<totalColumns; ++j )
 412       {
 413         float delay = 0.0f;
 414         float duration = 0.0f;
 415         if( count < actorsPerPage )
 416         {
 417           duration = durationPerActor;
 418           delay = delayBetweenActors * count;
 419         }
 420
 421         if( gUseMesh )
 422         {
 423           mHide.AnimateTo( Property( mActor[count], Actor::Property::ORIENTATION ),  Quaternion( Radian( Degree( 70.0f ) ), Vector3::XAXIS ), AlphaFunction::EASE_OUT, TimePeriod( delay, duration ) );
 424           mHide.AnimateBy( Property( mActor[count], Actor::Property::POSITION_Z ), 1000.0f, AlphaFunction::EASE_OUT_BACK, TimePeriod( delay +delayBetweenActors*actorsPerPage + duration, duration ) );
 425         }
 426         else
 427         {
 428           mHide.AnimateTo( Property( mImageView[count], Actor::Property::ORIENTATION ),  Quaternion( Radian( Degree( 70.0f ) ), Vector3::XAXIS ), AlphaFunction::EASE_OUT, TimePeriod( delay, duration ) );
 429           mHide.AnimateBy( Property( mImageView[count], Actor::Property::POSITION_Z ), 1000.0f, AlphaFunction::EASE_OUT_BACK, TimePeriod( delay +delayBetweenActors*actorsPerPage + duration, duration ) );
 430         }
 431         ++count;
 432       }
 433     }
 434
 435     mHide.Play();
 436     mHide.FinishedSignal().Connect( this, &PerfScroll::OnAnimationEnd );
 437   }
 438
 439   void OnKeyEvent( const KeyEvent& event )
 440   {
 441     if( event.GetState() == KeyEvent::DOWN )
 442     {
 443       if ( IsKey( event, Dali::DALI_KEY_ESCAPE ) || IsKey( event, Dali::DALI_KEY_BACK ) )
 444       {
 445         mApplication.Quit();
 446       }
 447     }
 448   }
 449
 450 private:
 451   Application&  mApplication;
 452
 453   std::vector<Actor>  mActor;
 454   std::vector<ImageView>  mImageView;
 455   Actor mParent;
 456
 457   Vector3             mSize;
 458   unsigned int        mRowsPerPage;
 459   unsigned int        mColumnsPerPage;
 460   unsigned int        mPageCount;
 461
 462   Animation           mShow;
 463   Animation           mScroll;
 464   Animation           mHide;
 465 };
 466
 467 int DALI_EXPORT_API main( int argc, char **argv )
 468 {
 469   Application application = Application::New( &argc, &argv );
 470
 471   for( int i(1) ; i < argc; ++i )
 472   {
 473     std::string arg( argv[i] );
 474     if( arg.compare("--use-mesh") == 0)
 475     {
 476       gUseMesh = true;
 477     }
 478     else if( arg.compare("--nine-patch" ) == 0)
 479     {
 480       gNinePatch = true;
 481     }
 482     else if( arg.compare(0, 2, "-t" ) == 0)
 483     {
 484       gDuration = atof( arg.substr( 2, arg.size()).c_str());
 485     }
 486   }
 487
 488   PerfScroll test( application );
 489   application.MainLoop();
 490
 491   return 0;
 492 }