dali-toolkit/internal/controls/bloom-view/bloom-view-impl.cpp

   1 /*
   2  * Copyright (c) 2021 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 // CLASS HEADER
  19 #include "bloom-view-impl.h"
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/devel-api/common/stage.h>
  23 #include <dali/public-api/animation/constraint.h>
  24 #include <dali/public-api/animation/constraints.h>
  25 #include <dali/public-api/object/property-map.h>
  26 #include <dali/public-api/object/type-registry-helper.h>
  27 #include <dali/public-api/object/type-registry.h>
  28 #include <dali/public-api/render-tasks/render-task-list.h>
  29 #include <dali/public-api/rendering/renderer.h>
  30 #include <iomanip>
  31 #include <sstream>
  32
  33 // INTERNAL INCLUDES
  34 #include <dali-toolkit/devel-api/controls/bloom-view/bloom-view.h>
  35 #include <dali-toolkit/devel-api/controls/control-devel.h>
  36 #include <dali-toolkit/devel-api/controls/gaussian-blur-view/gaussian-blur-view.h>
  37 #include <dali-toolkit/internal/controls/control/control-renderers.h>
  38 #include <dali-toolkit/internal/controls/gaussian-blur-view/gaussian-blur-view-impl.h>
  39 #include <dali-toolkit/internal/graphics/builtin-shader-extern-gen.h>
  40
  41 namespace Dali
  42 {
  43 namespace Toolkit
  44 {
  45 namespace Internal
  46 {
  47 namespace
  48 {
  49 using namespace Dali;
  50
  51 BaseHandle Create()
  52 {
  53   return Toolkit::BloomView::New();
  54 }
  55
  56 DALI_TYPE_REGISTRATION_BEGIN(Toolkit::BloomView, Toolkit::Control, Create)
  57 DALI_TYPE_REGISTRATION_END()
  58
  59 // default parameters
  60 const float BLOOM_THRESHOLD_DEFAULT     = 0.25f;
  61 const float BLOOM_BLUR_STRENGTH_DEFAULT = 1.0f;
  62 const float BLOOM_INTENSITY_DEFAULT     = 1.0f;
  63 const float IMAGE_INTENSITY_DEFAULT     = 1.0f;
  64 const float BLOOM_SATURATION_DEFAULT    = 1.0f;
  65 const float IMAGE_SATURATION_DEFAULT    = 1.0f;
  66
  67 // gaussian blur
  68 const unsigned int  BLOOM_GAUSSIAN_BLUR_VIEW_DEFAULT_NUM_SAMPLES                = 5;
  69 const float         BLOOM_GAUSSIAN_BLUR_VIEW_DEFAULT_BLUR_BELL_CURVE_WIDTH      = 1.5f;
  70 const Pixel::Format BLOOM_GAUSSIAN_BLUR_VIEW_DEFAULT_RENDER_TARGET_PIXEL_FORMAT = Pixel::RGBA8888;
  71 const float         BLOOM_GAUSSIAN_BLUR_VIEW_DEFAULT_BLUR_FADE_IN               = 1.0f; // default, fully blurred
  72 const float         BLOOM_GAUSSIAN_BLUR_VIEW_DEFAULT_DOWNSAMPLE_WIDTH_SCALE     = 0.5f;
  73 const float         BLOOM_GAUSSIAN_BLUR_VIEW_DEFAULT_DOWNSAMPLE_HEIGHT_SCALE    = 0.5f;
  74
  75 const float ARBITRARY_FIELD_OF_VIEW = Math::PI / 4.0f;
  76
  77 const char* const BLOOM_BLUR_STRENGTH_PROPERTY_NAME             = "BlurStrengthProperty";
  78 const char* const BLOOM_THRESHOLD_PROPERTY_NAME                 = "uBloomThreshold";
  79 const char* const RECIP_ONE_MINUS_BLOOM_THRESHOLD_PROPERTY_NAME = "uRecipOneMinusBloomThreshold";
  80 const char* const BLOOM_INTENSITY_PROPERTY_NAME                 = "uBloomIntensity";
  81 const char* const BLOOM_SATURATION_PROPERTY_NAME                = "uBloomSaturation";
  82 const char* const IMAGE_INTENSITY_PROPERTY_NAME                 = "uImageIntensity";
  83 const char* const IMAGE_SATURATION_PROPERTY_NAME                = "uImageSaturation";
  84
  85 } // namespace
  86
  87 BloomView::BloomView()
  88 : Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT)),
  89   mBlurNumSamples(BLOOM_GAUSSIAN_BLUR_VIEW_DEFAULT_NUM_SAMPLES),
  90   mBlurBellCurveWidth(BLOOM_GAUSSIAN_BLUR_VIEW_DEFAULT_BLUR_BELL_CURVE_WIDTH),
  91   mPixelFormat(BLOOM_GAUSSIAN_BLUR_VIEW_DEFAULT_RENDER_TARGET_PIXEL_FORMAT),
  92   mDownsampleWidthScale(BLOOM_GAUSSIAN_BLUR_VIEW_DEFAULT_DOWNSAMPLE_WIDTH_SCALE),
  93   mDownsampleHeightScale(BLOOM_GAUSSIAN_BLUR_VIEW_DEFAULT_DOWNSAMPLE_HEIGHT_SCALE),
  94   mDownsampledWidth(0.0f),
  95   mDownsampledHeight(0.0f),
  96   mTargetSize(Vector2::ZERO),
  97   mLastSize(Vector2::ZERO),
  98   mChildrenRoot(Actor::New()),
  99   mInternalRoot(Actor::New()),
 100   mBloomThresholdPropertyIndex(Property::INVALID_INDEX),
 101   mBlurStrengthPropertyIndex(Property::INVALID_INDEX),
 102   mBloomIntensityPropertyIndex(Property::INVALID_INDEX),
 103   mBloomSaturationPropertyIndex(Property::INVALID_INDEX),
 104   mImageIntensityPropertyIndex(Property::INVALID_INDEX),
 105   mImageSaturationPropertyIndex(Property::INVALID_INDEX),
 106   mActivated(false)
 107 {
 108 }
 109
 110 BloomView::BloomView(const unsigned int blurNumSamples, const float blurBellCurveWidth, const Pixel::Format renderTargetPixelFormat, const float downsampleWidthScale, const float downsampleHeightScale)
 111 : Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT)),
 112   mBlurNumSamples(blurNumSamples),
 113   mBlurBellCurveWidth(blurBellCurveWidth),
 114   mPixelFormat(renderTargetPixelFormat),
 115   mDownsampleWidthScale(downsampleWidthScale),
 116   mDownsampleHeightScale(downsampleHeightScale),
 117   mDownsampledWidth(0.0f),
 118   mDownsampledHeight(0.0f),
 119   mTargetSize(Vector2::ZERO),
 120   mLastSize(Vector2::ZERO),
 121   mChildrenRoot(Actor::New()),
 122   mInternalRoot(Actor::New()),
 123   mBloomThresholdPropertyIndex(Property::INVALID_INDEX),
 124   mBlurStrengthPropertyIndex(Property::INVALID_INDEX),
 125   mBloomIntensityPropertyIndex(Property::INVALID_INDEX),
 126   mBloomSaturationPropertyIndex(Property::INVALID_INDEX),
 127   mImageIntensityPropertyIndex(Property::INVALID_INDEX),
 128   mImageSaturationPropertyIndex(Property::INVALID_INDEX),
 129   mActivated(false)
 130 {
 131 }
 132
 133 BloomView::~BloomView()
 134 {
 135 }
 136
 137 Toolkit::BloomView BloomView::New()
 138 {
 139   BloomView* impl = new BloomView();
 140
 141   Dali::Toolkit::BloomView handle = Dali::Toolkit::BloomView(*impl);
 142
 143   // Second-phase init of the implementation
 144   // This can only be done after the CustomActor connection has been made...
 145   impl->Initialize();
 146
 147   return handle;
 148 }
 149
 150 Toolkit::BloomView BloomView::New(const unsigned int blurNumSamples, const float blurBellCurveWidth, const Pixel::Format renderTargetPixelFormat, const float downsampleWidthScale, const float downsampleHeightScale)
 151 {
 152   BloomView* impl = new BloomView(blurNumSamples, blurBellCurveWidth, renderTargetPixelFormat, downsampleWidthScale, downsampleHeightScale);
 153
 154   Dali::Toolkit::BloomView handle = Dali::Toolkit::BloomView(*impl);
 155
 156   // Second-phase init of the implementation
 157   // This can only be done after the CustomActor connection has been made...
 158   impl->Initialize();
 159
 160   return handle;
 161 }
 162
 163 ///////////////////////////////////////////////////////////
 164 //
 165 // Private methods
 166 //
 167
 168 void BloomView::OnInitialize()
 169 {
 170   // root actor to parent all user added actors, needed to allow us to set that subtree as exclusive for our child render task
 171   mChildrenRoot.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
 172   mInternalRoot.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
 173
 174   //////////////////////////////////////////////////////
 175   // Create actors
 176
 177   // Create an image view for rendering from the scene texture to the bloom texture
 178   mBloomExtractActor = Actor::New();
 179   mBloomExtractActor.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
 180
 181   // Create an image view for compositing the result (scene and bloom textures) to output
 182   mCompositeActor = Actor::New();
 183   mCompositeActor.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
 184
 185   // Create an image view for holding final result, i.e. the blurred image. This will get rendered to screen later, via default / user render task
 186   mTargetActor = Actor::New();
 187   mTargetActor.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
 188
 189   // Create the Gaussian Blur object + render tasks
 190   // Note that we use mBloomExtractTarget as the source image and also re-use this as the gaussian blur final render target. This saves the gaussian blur code from creating it
 191   // render targets etc internally, so we make better use of resources
 192   // Note, this also internally creates the render tasks used by the Gaussian blur, this must occur after the bloom extraction and before the compositing
 193   mGaussianBlurView = Dali::Toolkit::GaussianBlurView::New(mBlurNumSamples, mBlurBellCurveWidth, mPixelFormat, mDownsampleWidthScale, mDownsampleHeightScale, true);
 194   mGaussianBlurView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
 195
 196   //////////////////////////////////////////////////////
 197   // Create cameras for the renders corresponding to the (potentially downsampled) render targets' size
 198   mRenderDownsampledCamera = CameraActor::New();
 199   mRenderDownsampledCamera.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
 200   mRenderDownsampledCamera.SetInvertYAxis(true);
 201
 202   mRenderFullSizeCamera = CameraActor::New();
 203   mRenderFullSizeCamera.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
 204   mRenderFullSizeCamera.SetInvertYAxis(true);
 205
 206   ////////////////////////////////
 207   // Connect to actor tree
 208   Self().Add(mChildrenRoot);
 209   Self().Add(mInternalRoot);
 210   mInternalRoot.Add(mBloomExtractActor);
 211   mInternalRoot.Add(mGaussianBlurView);
 212   mInternalRoot.Add(mCompositeActor);
 213   mInternalRoot.Add(mTargetActor);
 214   mInternalRoot.Add(mRenderDownsampledCamera);
 215   mInternalRoot.Add(mRenderFullSizeCamera);
 216
 217   // bind properties for / set shader constants to defaults
 218   SetupProperties();
 219
 220   Self().SetProperty(DevelControl::Property::ACCESSIBILITY_ROLE, Dali::Accessibility::Role::ANIMATION);
 221 }
 222
 223 void BloomView::OnSizeSet(const Vector3& targetSize)
 224 {
 225   mTargetSize = Vector2(targetSize);
 226   mChildrenRoot.SetProperty(Actor::Property::SIZE, targetSize);
 227   mCompositeActor.SetProperty(Actor::Property::SIZE, targetSize);
 228   mTargetActor.SetProperty(Actor::Property::SIZE, targetSize);
 229
 230   // Children render camera must move when GaussianBlurView object is
 231   // resized. This is since we cannot change render target size - so we need
 232   // to remap the child actors' rendering accordingly so they still exactly
 233   // fill the render target. Note that this means the effective resolution of
 234   // the child render changes as the GaussianBlurView object changes size,
 235   // this is the trade off for not being able to modify render target size
 236   // Change camera z position based on GaussianBlurView actor height
 237   float cameraPosConstraintScale = 0.5f / tanf(ARBITRARY_FIELD_OF_VIEW * 0.5f);
 238   mRenderFullSizeCamera.SetProperty(Actor::Property::POSITION_Z, mTargetSize.height * cameraPosConstraintScale);
 239
 240   // if we have already activated the blur, need to update render target sizes now to reflect the new size of this actor
 241   if(mActivated)
 242   {
 243     Deactivate();
 244     Activate();
 245   }
 246
 247   Control::OnSizeSet(targetSize);
 248 }
 249
 250 void BloomView::OnChildAdd(Actor& child)
 251 {
 252   if(child != mChildrenRoot && child != mInternalRoot)
 253   {
 254     mChildrenRoot.Add(child);
 255   }
 256
 257   Control::OnChildAdd(child);
 258 }
 259
 260 void BloomView::OnChildRemove(Actor& child)
 261 {
 262   mChildrenRoot.Remove(child);
 263
 264   Control::OnChildRemove(child);
 265 }
 266
 267 void BloomView::AllocateResources()
 268 {
 269   // size of render targets etc is based on the size of this actor, ignoring z
 270   if(mTargetSize != mLastSize || !mActivated)
 271   {
 272     mLastSize = mTargetSize;
 273
 274     // get size of downsampled render targets
 275     mDownsampledWidth  = mTargetSize.width * mDownsampleWidthScale;
 276     mDownsampledHeight = mTargetSize.height * mDownsampleHeightScale;
 277
 278     //////////////////////////////////////////////////////
 279     // Create cameras
 280
 281     // Create and place a camera for the renders corresponding to the (potentially downsampled) render targets' size
 282     mRenderDownsampledCamera.SetFieldOfView(ARBITRARY_FIELD_OF_VIEW);
 283     mRenderDownsampledCamera.SetNearClippingPlane(1.0f);
 284     mRenderDownsampledCamera.SetAspectRatio(mDownsampledWidth / mDownsampledHeight);
 285     mRenderDownsampledCamera.SetType(Dali::Camera::FREE_LOOK); // camera orientation based solely on actor
 286
 287     mRenderDownsampledCamera.SetProperty(Actor::Property::POSITION, Vector3(0.0f, 0.0f, ((mDownsampledHeight * 0.5f) / tanf(ARBITRARY_FIELD_OF_VIEW * 0.5f))));
 288
 289     // Create and place a camera for the children render, corresponding to its render target size
 290     mRenderFullSizeCamera.SetFieldOfView(ARBITRARY_FIELD_OF_VIEW);
 291     mRenderFullSizeCamera.SetNearClippingPlane(1.0f);
 292     mRenderFullSizeCamera.SetAspectRatio(mTargetSize.width / mTargetSize.height);
 293     mRenderFullSizeCamera.SetType(Dali::Camera::FREE_LOOK); // camera orientation based solely on actor
 294
 295     float cameraPosConstraintScale = 0.5f / tanf(ARBITRARY_FIELD_OF_VIEW * 0.5f);
 296     mRenderFullSizeCamera.SetProperty(Actor::Property::POSITION, Vector3(0.0f, 0.0f, mTargetSize.height * cameraPosConstraintScale));
 297
 298     //////////////////////////////////////////////////////
 299     // Pass size change onto GaussianBlurView, so it matches
 300     mGaussianBlurView.SetProperty(Actor::Property::SIZE, mTargetSize);
 301     GetImpl(mGaussianBlurView).AllocateResources();
 302
 303     mGaussianBlurView.SetProperty(Actor::Property::VISIBLE, true);
 304
 305     //////////////////////////////////////////////////////
 306     // Create render targets
 307
 308     // create off screen buffer of new size to render our child actors to
 309     mRenderTargetForRenderingChildren = FrameBuffer::New(mTargetSize.width, mTargetSize.height, FrameBuffer::Attachment::NONE);
 310     Texture textureForChildren        = Texture::New(TextureType::TEXTURE_2D, mPixelFormat, unsigned(mTargetSize.width), unsigned(mTargetSize.height));
 311     mRenderTargetForRenderingChildren.AttachColorTexture(textureForChildren);
 312
 313     mBloomExtractTarget = FrameBuffer::New(mDownsampledWidth, mDownsampledHeight, FrameBuffer::Attachment::NONE);
 314     Texture texture     = Texture::New(TextureType::TEXTURE_2D, mPixelFormat, unsigned(mDownsampledWidth), unsigned(mDownsampledHeight));
 315     mBloomExtractTarget.AttachColorTexture(texture);
 316
 317     FrameBuffer blurExtractTarget = FrameBuffer::New(mDownsampledWidth, mDownsampledHeight, FrameBuffer::Attachment::NONE);
 318     texture                       = Texture::New(TextureType::TEXTURE_2D, mPixelFormat, unsigned(mDownsampledWidth), unsigned(mDownsampledHeight));
 319     blurExtractTarget.AttachColorTexture(texture);
 320
 321     mOutputRenderTarget   = FrameBuffer::New(mTargetSize.width, mTargetSize.height, FrameBuffer::Attachment::NONE);
 322     Texture outputTexture = Texture::New(TextureType::TEXTURE_2D, mPixelFormat, unsigned(mTargetSize.width), unsigned(mTargetSize.height));
 323     mOutputRenderTarget.AttachColorTexture(outputTexture);
 324
 325     //////////////////////////////////////////////////////
 326     // Point actors and render tasks at new render targets
 327
 328     Renderer bloomRenderer = CreateRenderer(BASIC_VERTEX_SOURCE, SHADER_BLOOM_VIEW_EXTRACT_SHADER_FRAG);
 329     SetRendererTexture(bloomRenderer, mRenderTargetForRenderingChildren);
 330     mBloomExtractActor.AddRenderer(bloomRenderer);
 331     mBloomExtractActor.SetProperty(Actor::Property::SIZE, Vector2(mDownsampledWidth, mDownsampledHeight)); // size needs to match render target
 332
 333     // set GaussianBlurView to blur our extracted bloom
 334     mGaussianBlurView.SetUserImageAndOutputRenderTarget(mBloomExtractTarget.GetColorTexture(), blurExtractTarget);
 335
 336     // use the completed blur in the first buffer and composite with the original child actors render
 337     Renderer compositeRenderer = CreateRenderer(BASIC_VERTEX_SOURCE, SHADER_BLOOM_VIEW_COMPOSITE_SHADER_FRAG);
 338     SetRendererTexture(compositeRenderer, mRenderTargetForRenderingChildren);
 339     TextureSet textureSet = compositeRenderer.GetTextures();
 340     textureSet.SetTexture(0u, mRenderTargetForRenderingChildren.GetColorTexture());
 341     textureSet.SetTexture(1u, blurExtractTarget.GetColorTexture());
 342     mCompositeActor.AddRenderer(compositeRenderer);
 343
 344     // set up target actor for rendering result, i.e. the blurred image
 345     Renderer targetRenderer = CreateRenderer(BASIC_VERTEX_SOURCE, BASIC_FRAGMENT_SOURCE);
 346     SetRendererTexture(targetRenderer, mOutputRenderTarget);
 347     mTargetActor.AddRenderer(targetRenderer);
 348   }
 349 }
 350
 351 void BloomView::CreateRenderTasks()
 352 {
 353   RenderTaskList taskList = Stage::GetCurrent().GetRenderTaskList();
 354
 355   // create render task to render our child actors to offscreen buffer
 356   mRenderChildrenTask = taskList.CreateTask();
 357   mRenderChildrenTask.SetSourceActor(mChildrenRoot);
 358   mRenderChildrenTask.SetExclusive(true);
 359   mRenderChildrenTask.SetInputEnabled(false);
 360   mRenderChildrenTask.SetClearEnabled(true);
 361   mRenderChildrenTask.SetCameraActor(mRenderFullSizeCamera); // use camera that covers render target exactly
 362   mRenderChildrenTask.SetFrameBuffer(mRenderTargetForRenderingChildren);
 363
 364   // Extract the bright part of the image and render to a new buffer. Downsampling also occurs at this stage to save pixel fill, if it is set up.
 365   mBloomExtractTask = taskList.CreateTask();
 366   mBloomExtractTask.SetSourceActor(mBloomExtractActor);
 367   mBloomExtractTask.SetExclusive(true);
 368   mBloomExtractTask.SetInputEnabled(false);
 369   mBloomExtractTask.SetClearEnabled(true);
 370   mBloomExtractTask.SetCameraActor(mRenderDownsampledCamera);
 371   mBloomExtractTask.SetFrameBuffer(mBloomExtractTarget);
 372
 373   // GaussianBlurView tasks must be created here, so they are executed in the correct order with respect to BloomView tasks
 374   GetImpl(mGaussianBlurView).CreateRenderTasks();
 375
 376   // Use an image view displaying the children render and composite it with the blurred bloom buffer, targeting the output
 377   mCompositeTask = taskList.CreateTask();
 378   mCompositeTask.SetSourceActor(mCompositeActor);
 379   mCompositeTask.SetExclusive(true);
 380   mCompositeTask.SetInputEnabled(false);
 381   mCompositeTask.SetClearEnabled(true);
 382   mCompositeTask.SetCameraActor(mRenderFullSizeCamera);
 383   mCompositeTask.SetFrameBuffer(mOutputRenderTarget);
 384 }
 385
 386 void BloomView::RemoveRenderTasks()
 387 {
 388   RenderTaskList taskList = Stage::GetCurrent().GetRenderTaskList();
 389
 390   taskList.RemoveTask(mRenderChildrenTask);
 391   taskList.RemoveTask(mBloomExtractTask);
 392
 393   GetImpl(mGaussianBlurView).RemoveRenderTasks();
 394
 395   taskList.RemoveTask(mCompositeTask);
 396 }
 397
 398 void BloomView::Activate()
 399 {
 400   // make sure resources are allocated and start the render tasks processing
 401   AllocateResources();
 402   CreateRenderTasks();
 403   mActivated = true;
 404 }
 405
 406 void BloomView::Deactivate()
 407 {
 408   // stop render tasks processing
 409   // Note: render target resources are automatically freed since we set the Image::Unused flag
 410   RemoveRenderTasks();
 411
 412   mRenderTargetForRenderingChildren.Reset();
 413   mBloomExtractTarget.Reset();
 414   mOutputRenderTarget.Reset();
 415
 416   // Reset children
 417   mBloomExtractActor.RemoveRenderer(0u);
 418   mTargetActor.RemoveRenderer(0u);
 419   mCompositeActor.RemoveRenderer(0u);
 420
 421   mGaussianBlurView.SetProperty(Actor::Property::VISIBLE, false);
 422
 423   mActivated = false;
 424 }
 425
 426 /**
 427  * RecipOneMinusConstraint
 428  *
 429  * f(current, property) = property
 430  */
 431 struct RecipOneMinusConstraint
 432 {
 433   RecipOneMinusConstraint()
 434   {
 435   }
 436
 437   void operator()(float& current, const PropertyInputContainer& inputs)
 438   {
 439     current = 1.0f / (1.0f - inputs[0]->GetFloat());
 440   }
 441 };
 442
 443 // create properties and constraints to tie internal shader etc settings to BloomView object. User can therefore animate / set them via BloomView object without knowing about
 444 // internal implementation classes
 445 void BloomView::SetupProperties()
 446 {
 447   CustomActor self = Self();
 448
 449   ///////////////////////////////////////////
 450   // bloom threshold
 451
 452   // set defaults, makes sure properties are registered with shader
 453   mBloomExtractActor.RegisterProperty(BLOOM_THRESHOLD_PROPERTY_NAME, BLOOM_THRESHOLD_DEFAULT);
 454   mBloomExtractActor.RegisterProperty(RECIP_ONE_MINUS_BLOOM_THRESHOLD_PROPERTY_NAME, 1.0f / (1.0f - BLOOM_THRESHOLD_DEFAULT));
 455
 456   // Register a property that the user can control to change the bloom threshold
 457   mBloomThresholdPropertyIndex                      = self.RegisterProperty(BLOOM_THRESHOLD_PROPERTY_NAME, BLOOM_THRESHOLD_DEFAULT);
 458   Property::Index shaderBloomThresholdPropertyIndex = mBloomExtractActor.GetPropertyIndex(BLOOM_THRESHOLD_PROPERTY_NAME);
 459   Constraint      bloomThresholdConstraint          = Constraint::New<float>(mBloomExtractActor, shaderBloomThresholdPropertyIndex, EqualToConstraint());
 460   bloomThresholdConstraint.AddSource(Source(self, mBloomThresholdPropertyIndex));
 461   bloomThresholdConstraint.Apply();
 462
 463   // precalc 1.0 / (1.0 - threshold) on CPU to save shader insns, using constraint to tie to the normal threshold property
 464   Property::Index shaderRecipOneMinusBloomThresholdPropertyIndex = mBloomExtractActor.GetPropertyIndex(RECIP_ONE_MINUS_BLOOM_THRESHOLD_PROPERTY_NAME);
 465   Constraint      thresholdConstraint                            = Constraint::New<float>(mBloomExtractActor, shaderRecipOneMinusBloomThresholdPropertyIndex, RecipOneMinusConstraint());
 466   thresholdConstraint.AddSource(LocalSource(shaderBloomThresholdPropertyIndex));
 467   thresholdConstraint.Apply();
 468
 469   ////////////////////////////////////////////
 470   // bloom strength
 471
 472   // Register a property that the user can control to fade the blur in / out via internal GaussianBlurView object
 473   mBlurStrengthPropertyIndex        = self.RegisterProperty(BLOOM_BLUR_STRENGTH_PROPERTY_NAME, BLOOM_BLUR_STRENGTH_DEFAULT);
 474   Constraint blurStrengthConstraint = Constraint::New<float>(mGaussianBlurView, mGaussianBlurView.GetBlurStrengthPropertyIndex(), EqualToConstraint());
 475   blurStrengthConstraint.AddSource(Source(self, mBlurStrengthPropertyIndex));
 476   blurStrengthConstraint.Apply();
 477
 478   ////////////////////////////////////////////
 479   // bloom intensity
 480
 481   // Register a property that the user can control to fade the bloom intensity via internally hidden shader
 482   mBloomIntensityPropertyIndex = self.RegisterProperty(BLOOM_INTENSITY_PROPERTY_NAME, BLOOM_INTENSITY_DEFAULT);
 483   mCompositeActor.RegisterProperty(BLOOM_INTENSITY_PROPERTY_NAME, BLOOM_INTENSITY_DEFAULT);
 484   Property::Index shaderBloomIntensityPropertyIndex = mCompositeActor.GetPropertyIndex(BLOOM_INTENSITY_PROPERTY_NAME);
 485   Constraint      bloomIntensityConstraint          = Constraint::New<float>(mCompositeActor, shaderBloomIntensityPropertyIndex, EqualToConstraint());
 486   bloomIntensityConstraint.AddSource(Source(self, mBloomIntensityPropertyIndex));
 487   bloomIntensityConstraint.Apply();
 488
 489   ////////////////////////////////////////////
 490   // bloom saturation
 491
 492   // Register a property that the user can control to fade the bloom saturation via internally hidden shader
 493   mBloomSaturationPropertyIndex = self.RegisterProperty(BLOOM_SATURATION_PROPERTY_NAME, BLOOM_SATURATION_DEFAULT);
 494   mCompositeActor.RegisterProperty(BLOOM_SATURATION_PROPERTY_NAME, BLOOM_SATURATION_DEFAULT);
 495   Property::Index shaderBloomSaturationPropertyIndex = mCompositeActor.GetPropertyIndex(BLOOM_SATURATION_PROPERTY_NAME);
 496   Constraint      bloomSaturationConstraint          = Constraint::New<float>(mCompositeActor, shaderBloomSaturationPropertyIndex, EqualToConstraint());
 497   bloomSaturationConstraint.AddSource(Source(self, mBloomSaturationPropertyIndex));
 498   bloomSaturationConstraint.Apply();
 499
 500   ////////////////////////////////////////////
 501   // image intensity
 502
 503   // Register a property that the user can control to fade the image intensity via internally hidden shader
 504   mImageIntensityPropertyIndex = self.RegisterProperty(IMAGE_INTENSITY_PROPERTY_NAME, IMAGE_INTENSITY_DEFAULT);
 505   mCompositeActor.RegisterProperty(IMAGE_INTENSITY_PROPERTY_NAME, IMAGE_INTENSITY_DEFAULT);
 506   Property::Index shaderImageIntensityPropertyIndex = mCompositeActor.GetPropertyIndex(IMAGE_INTENSITY_PROPERTY_NAME);
 507   Constraint      imageIntensityConstraint          = Constraint::New<float>(mCompositeActor, shaderImageIntensityPropertyIndex, EqualToConstraint());
 508   imageIntensityConstraint.AddSource(Source(self, mImageIntensityPropertyIndex));
 509   imageIntensityConstraint.Apply();
 510
 511   ////////////////////////////////////////////
 512   // image saturation
 513
 514   // Register a property that the user can control to fade the image saturation via internally hidden shader
 515   mImageSaturationPropertyIndex = self.RegisterProperty(IMAGE_SATURATION_PROPERTY_NAME, IMAGE_SATURATION_DEFAULT);
 516   mCompositeActor.RegisterProperty(IMAGE_SATURATION_PROPERTY_NAME, IMAGE_SATURATION_DEFAULT);
 517   Property::Index shaderImageSaturationPropertyIndex = mCompositeActor.GetPropertyIndex(IMAGE_SATURATION_PROPERTY_NAME);
 518   Constraint      imageSaturationConstraint          = Constraint::New<float>(mCompositeActor, shaderImageSaturationPropertyIndex, EqualToConstraint());
 519   imageSaturationConstraint.AddSource(Source(self, mImageSaturationPropertyIndex));
 520   imageSaturationConstraint.Apply();
 521 }
 522
 523 } // namespace Internal
 524
 525 } // namespace Toolkit
 526
 527 } // namespace Dali