examples/advanced-blend-mode/advanced-blend-mode-example.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 #include <dali-toolkit/dali-toolkit.h>
  19 #include <dali/devel-api/actors/actor-devel.h>
  20
  21 #include <dali/devel-api/common/capabilities.h>
  22 #include <dali/integration-api/debug.h>
  23
  24 using namespace Dali;
  25 using Dali::Toolkit::TextLabel;
  26
  27 // This example shows how to create and display Hello World! using a simple TextActor
  28 //
  29 class AdvancedBlendModeController : public ConnectionTracker
  30 {
  31 public:
  32   AdvancedBlendModeController(Application& application)
  33   : mApplication(application)
  34   {
  35     // Connect to the Application's Init signal
  36     mApplication.InitSignal().Connect(this, &AdvancedBlendModeController::Create);
  37   }
  38
  39   ~AdvancedBlendModeController() = default; // Nothing to do in destructor
  40
  41   // The Init signal is received once (only) during the Application lifetime
  42   void Create(Application& application)
  43   {
  44     // Get a handle to the stage
  45     Window window = application.GetWindow();
  46     window.SetBackgroundColor(Color::BLACK);
  47
  48     Toolkit::ImageView imageView = Toolkit::ImageView::New();
  49     Property::Map      imagePropertyMap;
  50     imagePropertyMap.Insert(Toolkit::Visual::Property::TYPE, Toolkit::Visual::IMAGE);
  51     imagePropertyMap.Insert(Toolkit::ImageVisual::Property::URL, DEMO_IMAGE_DIR "gallery-large-19.jpg");
  52     imageView.SetProperty(Toolkit::ImageView::Property::IMAGE, imagePropertyMap);
  53     imageView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_CENTER);
  54     imageView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_CENTER);
  55     imageView.SetProperty(Actor::Property::SIZE, Vector2(600, 600));
  56     window.Add(imageView);
  57
  58     Toolkit::Control control_1 = Toolkit::Control::New();
  59     Property::Map    colorVisualMap_1;
  60     colorVisualMap_1.Insert(Toolkit::Visual::Property::TYPE, Toolkit::Visual::COLOR);
  61     colorVisualMap_1.Insert(Toolkit::ColorVisual::Property::MIX_COLOR, Dali::Color::RED);
  62     colorVisualMap_1.Insert(Toolkit::Visual::Property::PREMULTIPLIED_ALPHA, true);
  63     control_1.SetProperty(Toolkit::Control::Property::BACKGROUND, colorVisualMap_1);
  64     control_1.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_CENTER);
  65     control_1.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_CENTER);
  66     control_1.SetProperty(Actor::Property::POSITION, Vector2(0, 0));
  67     control_1.SetProperty(Actor::Property::SIZE, Vector2(600, 200));
  68     if(Dali::Capabilities::IsBlendEquationSupported(Dali::DevelBlendEquation::SCREEN))
  69     {
  70       control_1.SetProperty(Dali::DevelActor::Property::BLEND_EQUATION, Dali::DevelBlendEquation::LUMINOSITY);
  71     }
  72     window.Add(control_1);
  73
  74     Toolkit::Control control_2 = Toolkit::Control::New();
  75     Property::Map    colorVisualMap_2;
  76     colorVisualMap_2.Insert(Toolkit::Visual::Property::TYPE, Toolkit::Visual::COLOR);
  77     colorVisualMap_2.Insert(Toolkit::ColorVisual::Property::MIX_COLOR, Dali::Color::GREEN);
  78     colorVisualMap_2.Insert(Toolkit::Visual::Property::PREMULTIPLIED_ALPHA, true);
  79     control_2.SetProperty(Toolkit::Control::Property::BACKGROUND, colorVisualMap_2);
  80     control_2.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_CENTER);
  81     control_2.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_CENTER);
  82     control_2.SetProperty(Actor::Property::POSITION, Vector2(0, 200));
  83     control_2.SetProperty(Actor::Property::SIZE, Vector2(600, 200));
  84     if(Dali::Capabilities::IsBlendEquationSupported(Dali::DevelBlendEquation::SCREEN))
  85     {
  86       control_2.SetProperty(Dali::DevelActor::Property::BLEND_EQUATION, Dali::DevelBlendEquation::LUMINOSITY);
  87     }
  88     window.Add(control_2);
  89
  90     Toolkit::Control control_3 = Toolkit::Control::New();
  91     Property::Map    colorVisualMap_3;
  92     colorVisualMap_3.Insert(Toolkit::Visual::Property::TYPE, Toolkit::Visual::COLOR);
  93     colorVisualMap_3.Insert(Toolkit::ColorVisual::Property::MIX_COLOR, Dali::Color::BLUE);
  94     colorVisualMap_3.Insert(Toolkit::Visual::Property::PREMULTIPLIED_ALPHA, true);
  95     control_3.SetProperty(Toolkit::Control::Property::BACKGROUND, colorVisualMap_3);
  96     control_3.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_CENTER);
  97     control_3.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_CENTER);
  98     control_3.SetProperty(Actor::Property::POSITION, Vector2(0, 400));
  99     control_3.SetProperty(Actor::Property::SIZE, Vector2(600, 200));
 100     if(Dali::Capabilities::IsBlendEquationSupported(Dali::DevelBlendEquation::SCREEN))
 101     {
 102       control_3.SetProperty(Dali::DevelActor::Property::BLEND_EQUATION, Dali::DevelBlendEquation::LUMINOSITY);
 103     }
 104     window.Add(control_3);
 105
 106     // Add text to explain what's being seen.
 107     auto label = Toolkit::TextLabel::New("If your device supports advanced blending, this shows an image at different levels of luminosity. If not, it instead shows red/green/blue sections.");
 108
 109     label[Toolkit::TextLabel::Property::MULTI_LINE] = true;
 110     label[Toolkit::TextLabel::Property::TEXT_COLOR] = Color::WHITE;
 111     label[Toolkit::TextLabel::Property::POINT_SIZE] = 12.0f;
 112     label[Actor::Property::PARENT_ORIGIN]           = ParentOrigin::BOTTOM_CENTER;
 113     label[Actor::Property::ANCHOR_POINT]            = AnchorPoint::BOTTOM_CENTER;
 114     label.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH);
 115     window.Add(label);
 116
 117     // Respond to a touch anywhere on the window
 118     window.GetRootLayer().TouchedSignal().Connect(this, &AdvancedBlendModeController::OnTouch);
 119
 120     // Respond to key events
 121     window.KeyEventSignal().Connect(this, &AdvancedBlendModeController::OnKeyEvent);
 122   }
 123
 124   bool OnTouch(Actor actor, const TouchEvent& touch)
 125   {
 126     // quit the application
 127     mApplication.Quit();
 128     return true;
 129   }
 130
 131   void OnKeyEvent(const KeyEvent& event)
 132   {
 133     if(event.GetState() == KeyEvent::DOWN)
 134     {
 135       if(IsKey(event, Dali::DALI_KEY_ESCAPE) || IsKey(event, Dali::DALI_KEY_BACK))
 136       {
 137         mApplication.Quit();
 138       }
 139     }
 140   }
 141
 142 private:
 143   Application& mApplication;
 144 };
 145
 146 int DALI_EXPORT_API main(int argc, char** argv)
 147 {
 148   Application                 application = Application::New(&argc, &argv);
 149   AdvancedBlendModeController test(application);
 150   application.MainLoop();
 151   return 0;
 152 }