dali-toolkit/internal/controls/super-blur-view/super-blur-view-impl.h

   1 #ifndef DALI_TOOLKIT_INTERNAL_SUPER_BLUR_VIEW_H
   2 #define DALI_TOOLKIT_INTERNAL_SUPER_BLUR_VIEW_H
   3
   4 /*
   5  * Copyright (c) 2019 Samsung Electronics Co., Ltd.
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  * http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  */
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/public-api/rendering/frame-buffer.h>
  23 #include <dali/public-api/rendering/renderer.h>
  24
  25 // INTERNAL INCLUDES
  26 #include <dali-toolkit/public-api/controls/control-impl.h>
  27 #include <dali-toolkit/devel-api/controls/super-blur-view/super-blur-view.h>
  28 #include <dali-toolkit/devel-api/controls/gaussian-blur-view/gaussian-blur-view.h>
  29 #include <dali-toolkit/devel-api/visual-factory/visual-factory.h>
  30
  31 namespace Dali
  32 {
  33
  34 namespace Toolkit
  35 {
  36
  37 class SuperBlurView;
  38
  39 namespace Internal
  40 {
  41
  42 /**
  43  * SuperBlurView implementation class
  44  */
  45 class SuperBlurView : public Control
  46 {
  47
  48 public:
  49
  50   /**
  51    * @copydoc Dali::Toolkit::SuperBlurView::New
  52    */
  53   static Toolkit::SuperBlurView New( unsigned int blurLevels );
  54
  55   /**
  56    * @copydoc Dali::Toolkit::SuperBlurView::SetImage
  57    */
  58   void SetTexture( Texture texture );
  59
  60   /**
  61    * @copydoc Dali::Toolkit::SuperBlurView::GetBlurStrengthPropertyIndex
  62    */
  63   Property::Index GetBlurStrengthPropertyIndex() const;
  64
  65   /**
  66    * @copydoc Dali::Toolkit::SuperBlurView::SetBlurStrength
  67    */
  68   void SetBlurStrength( float blurStrength );
  69
  70   /**
  71    * @copydoc Dali::Toolkit::SuperBlurView::GetCurrentBlurStrength
  72    */
  73   float GetCurrentBlurStrength() const;
  74
  75   /**
  76    * @copydoc Dali::Toolkit::SuperBlurView::BlurFinishedSignal
  77    */
  78   Dali::Toolkit::SuperBlurView::SuperBlurViewSignal& BlurFinishedSignal();
  79
  80   /**
  81    * @copydoc Dali::Toolkit::SuperBlurView::GetBlurredTexture
  82    */
  83   Texture GetBlurredTexture( unsigned int level );
  84
  85   // Properties
  86
  87   /**
  88    * Called when a property of an object of this type is set.
  89    * @param[in] object The object whose property is set.
  90    * @param[in] index The property index.
  91    * @param[in] value The new property value.
  92    */
  93   static void SetProperty( BaseObject* object, Property::Index propertyIndex, const Property::Value& value );
  94
  95   /**
  96    * Called to retrieve a property of an object of this type.
  97    * @param[in] object The object whose property is to be retrieved.
  98    * @param[in] index The property index.
  99    * @return The current value of the property.
 100    */
 101   static Property::Value GetProperty( BaseObject* object, Property::Index propertyIndex );
 102
 103 protected:
 104
 105   /**
 106    * Constructor. It initializes the SuperBlurView members
 107    */
 108   SuperBlurView( unsigned int blurLevels );
 109
 110   /**
 111    * A reference counted object may only be deleted by calling Unreference()
 112    */
 113   virtual ~SuperBlurView();
 114
 115 private: // from Control
 116
 117   /**
 118    * @copydoc Toolkit::Control::OnInitialize
 119    */
 120   void OnInitialize() override;
 121
 122   /**
 123    * @copydoc CustomActorImpl::OnSizeSet()
 124    */
 125   void OnSizeSet(const Vector3& targetSize) override;
 126
 127   /**
 128    * @copydoc CustomActorImpl::OnSceneConnection()
 129    */
 130   void OnSceneConnection( int depth ) override;
 131
 132   /**
 133    * @copydoc CustomActorImpl::OnSceneDisconnection()
 134    */
 135   void OnSceneDisconnection() override;
 136
 137   /**
 138    * @copydoc CustomActorImpl::GetNaturalSize()
 139    */
 140   Vector3 GetNaturalSize() override;
 141
 142 private:
 143
 144   /**
 145    * Carry out the idx-th pass of blurring
 146    * @param[in] idx The blur pass index
 147    * @param[in] texture The input texture for the current blurring, it is either the original image or the blurred texture from the previous pass
 148    */
 149   void BlurTexture( unsigned int idx, Texture texture );
 150
 151   /**
 152    * Signal handler to tell when the last blur view completes
 153    * @param[in] blurView The blur view that just completed
 154    */
 155   void OnBlurViewFinished( Toolkit::GaussianBlurView blurView );
 156
 157   /**
 158    * Clear the resources used to create the blurred image
 159    */
 160   void ClearBlurResource();
 161
 162 private:
 163   std::vector<Toolkit::GaussianBlurView> mGaussianBlurView;
 164   std::vector<FrameBuffer>               mBlurredImage;
 165   std::vector<Renderer>                  mRenderers;
 166   Texture                                mInputTexture;
 167   Vector2                                mTargetSize;
 168
 169   Toolkit::SuperBlurView::SuperBlurViewSignal mBlurFinishedSignal; ///< Signal emitted when blur has completed.
 170
 171   std::string                            mUrl;
 172   Property::Index                        mBlurStrengthPropertyIndex;
 173   unsigned int                           mBlurLevels;
 174   bool                                   mResourcesCleared;
 175 };
 176
 177 }
 178
 179 // Helpers for public-api forwarding methods
 180 inline Toolkit::Internal::SuperBlurView& GetImpl( Toolkit::SuperBlurView& obj )
 181 {
 182   DALI_ASSERT_ALWAYS(obj);
 183   Dali::RefObject& handle = obj.GetImplementation();
 184   return static_cast<Toolkit::Internal::SuperBlurView&>(handle);
 185 }
 186
 187 inline const Toolkit::Internal::SuperBlurView& GetImpl( const Toolkit::SuperBlurView& obj )
 188 {
 189   DALI_ASSERT_ALWAYS(obj);
 190   const Dali::RefObject& handle = obj.GetImplementation();
 191   return static_cast<const Toolkit::Internal::SuperBlurView&>(handle);
 192 }
 193
 194 }
 195
 196 }
 197
 198 #endif // DALI_TOOLKIT_INTERNAL_SUPER_BLUR_VIEW_H