2 * Copyright (c) 2021 Samsung Electronics Co., Ltd.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include "canvas-view-impl.h"
22 #include <dali/devel-api/scripting/scripting.h>
23 #include <dali/integration-api/adaptor-framework/adaptor.h>
24 #include <dali/public-api/object/type-registry-helper.h>
25 #include <dali/public-api/object/type-registry.h>
26 #include <dali/devel-api/rendering/texture-devel.h>
29 #include <dali-toolkit/devel-api/controls/control-devel.h>
30 #include <dali-toolkit/internal/controls/canvas-view/canvas-view-rasterize-thread.h>
31 #include <dali-toolkit/internal/controls/control/control-data-impl.h>
32 #include <dali-toolkit/internal/graphics/builtin-shader-extern-gen.h>
33 #include <dali-toolkit/internal/visuals/visual-factory-cache.h>
47 // Setup properties, signals and actions using the type-registry.
48 DALI_TYPE_REGISTRATION_BEGIN(Toolkit::CanvasView, Toolkit::Control, Create);
49 DALI_PROPERTY_REGISTRATION(Toolkit, CanvasView, "viewBox", VECTOR2, VIEW_BOX)
50 DALI_TYPE_REGISTRATION_END()
51 } // anonymous namespace
55 CanvasView::CanvasView(const Vector2& viewBox)
56 : Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT)),
57 mCanvasRenderer(CanvasRenderer::New(viewBox)),
61 mCanvasViewRasterizeThread(nullptr)
65 CanvasView::~CanvasView()
67 if(mCanvasViewRasterizeThread)
69 mCanvasViewRasterizeThread->RemoveTask(this);
71 CanvasViewRasterizeThread::TerminateThread(mCanvasViewRasterizeThread);
74 if(Adaptor::IsAvailable())
76 Adaptor::Get().UnregisterProcessor(*this);
80 Toolkit::CanvasView CanvasView::New(const Vector2& viewBox)
82 CanvasView* impl = new CanvasView(viewBox);
84 Toolkit::CanvasView handle = Toolkit::CanvasView(*impl);
86 // Second-phase init of the implementation
87 // This can only be done after the CustomActor connection has been made...
93 /////////////////////////////////////////////////////////////
95 void CanvasView::OnInitialize()
97 // CanvasView can relayout in the OnImageReady, alternative to a signal would be to have a upcall from the Control to CanvasView
98 Dali::Toolkit::Control handle(GetOwner());
100 DevelControl::SetAccessibilityConstructor(Self(), [](Dali::Actor actor) {
101 return std::unique_ptr<Dali::Accessibility::Accessible>(
102 new DevelControl::AccessibleImpl(actor, Dali::Accessibility::Role::IMAGE));
105 Adaptor::Get().RegisterProcessor(*this, true);
108 void CanvasView::OnRelayout(const Vector2& size, RelayoutContainer& container)
110 if(!mCanvasRenderer ||
111 !mCanvasRenderer.SetSize(size))
118 void CanvasView::OnSizeSet(const Vector3& targetSize)
120 Control::OnSizeSet(targetSize);
122 if(!mCanvasRenderer ||
123 !mCanvasRenderer.SetSize(Vector2(targetSize)))
127 mSize.width = targetSize.width;
128 mSize.height = targetSize.height;
131 void CanvasView::SetProperty(BaseObject* object, Property::Index propertyIndex, const Property::Value& value)
133 Toolkit::CanvasView canvasView = Toolkit::CanvasView::DownCast(Dali::BaseHandle(object));
136 CanvasView& canvasViewImpl(GetImpl(canvasView));
138 switch(propertyIndex)
140 case Toolkit::CanvasView::Property::VIEW_BOX:
142 Vector2 valueVector2;
143 if(value.Get(valueVector2))
145 canvasViewImpl.SetViewBox(valueVector2);
153 Property::Value CanvasView::GetProperty(BaseObject* object, Property::Index propertyIndex)
155 Property::Value value;
157 Toolkit::CanvasView canvasView = Toolkit::CanvasView::DownCast(Dali::BaseHandle(object));
161 CanvasView& canvasViewImpl(GetImpl(canvasView));
163 switch(propertyIndex)
165 case Toolkit::CanvasView::Property::VIEW_BOX:
167 value = canvasViewImpl.GetViewBox();
175 void CanvasView::Process(bool postProcessor)
177 if(mCanvasRenderer && mCanvasRenderer.IsCanvasChanged() && mSize.width > 0 && mSize.height > 0)
179 AddRasterizationTask();
183 void CanvasView::AddRasterizationTask()
185 CanvasRendererRasterizingTaskPtr newTask = new CanvasRendererRasterizingTask(this, mCanvasRenderer);
187 if(!mCanvasViewRasterizeThread)
189 mCanvasViewRasterizeThread = new CanvasViewRasterizeThread();
190 mCanvasViewRasterizeThread->RasterizationCompletedSignal().Connect(this, &CanvasView::ApplyRasterizedImage);
191 mCanvasViewRasterizeThread->Start();
194 if(mCanvasRenderer.Commit())
196 mCanvasViewRasterizeThread->AddTask(newTask);
200 void CanvasView::ApplyRasterizedImage(Texture rasterizedTexture)
202 if (rasterizedTexture && rasterizedTexture.GetWidth() != 0 && rasterizedTexture.GetHeight() != 0)
206 std::string fragmentShader = SHADER_CANVAS_VIEW_FRAG.data();
207 DevelTexture::ApplyNativeFragmentShader(rasterizedTexture, fragmentShader);
209 mTextureSet = TextureSet::New();
210 Geometry geometry = VisualFactoryCache::CreateQuadGeometry();
211 Shader shader = Shader::New(SHADER_CANVAS_VIEW_VERT, fragmentShader);
212 Renderer renderer = Renderer::New(geometry, shader);
214 renderer.SetTextures(mTextureSet);
215 renderer.SetProperty(Renderer::Property::BLEND_PRE_MULTIPLIED_ALPHA, true);
216 Self().AddRenderer(renderer);
218 mTextureSet.SetTexture(0, rasterizedTexture);
221 //If there are accumulated changes to CanvasRenderer during Rasterize, Rasterize once again.
222 if(mCanvasRenderer && mCanvasRenderer.IsCanvasChanged())
224 AddRasterizationTask();
228 bool CanvasView::AddDrawable(Dali::CanvasRenderer::Drawable& drawable)
230 if(mCanvasRenderer && mCanvasRenderer.AddDrawable(drawable))
237 bool CanvasView::RemoveDrawable(Dali::CanvasRenderer::Drawable& drawable)
239 if(mCanvasRenderer && mCanvasRenderer.RemoveDrawable(drawable))
246 bool CanvasView::RemoveAllDrawables()
248 if(mCanvasRenderer && mCanvasRenderer.RemoveAllDrawables())
255 bool CanvasView::SetViewBox(const Vector2& viewBox)
257 if(mCanvasRenderer && mCanvasRenderer.SetViewBox(viewBox))
264 const Vector2& CanvasView::GetViewBox()
268 return mCanvasRenderer.GetViewBox();
270 return Vector2::ZERO;
272 } // namespace Internal
273 } // namespace Toolkit