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>
28 #include <dali-toolkit/devel-api/controls/control-devel.h>
29 #include <dali-toolkit/internal/controls/canvas-view/canvas-view-rasterize-thread.h>
30 #include <dali-toolkit/internal/controls/control/control-data-impl.h>
31 #include <dali-toolkit/internal/graphics/builtin-shader-extern-gen.h>
32 #include <dali-toolkit/internal/visuals/visual-factory-cache.h>
46 // Setup properties, signals and actions using the type-registry.
47 DALI_TYPE_REGISTRATION_BEGIN(Toolkit::CanvasView, Toolkit::Control, Create);
48 DALI_PROPERTY_REGISTRATION(Toolkit, CanvasView, "viewBox", VECTOR2, VIEW_BOX)
49 DALI_TYPE_REGISTRATION_END()
50 } // anonymous namespace
54 CanvasView::CanvasView(const Vector2& viewBox)
55 : Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT)),
56 mCanvasRenderer(CanvasRenderer::New(viewBox)),
60 mCanvasViewRasterizeThread(nullptr)
64 CanvasView::~CanvasView()
66 if(mCanvasViewRasterizeThread)
68 mCanvasViewRasterizeThread->RemoveTask(this);
70 CanvasViewRasterizeThread::TerminateThread(mCanvasViewRasterizeThread);
73 if(Adaptor::IsAvailable())
75 Adaptor::Get().UnregisterProcessor(*this);
79 Toolkit::CanvasView CanvasView::New(const Vector2& viewBox)
81 CanvasView* impl = new CanvasView(viewBox);
83 Toolkit::CanvasView handle = Toolkit::CanvasView(*impl);
85 // Second-phase init of the implementation
86 // This can only be done after the CustomActor connection has been made...
92 /////////////////////////////////////////////////////////////
94 void CanvasView::OnInitialize()
96 // CanvasView can relayout in the OnImageReady, alternative to a signal would be to have a upcall from the Control to CanvasView
97 Dali::Toolkit::Control handle(GetOwner());
99 DevelControl::SetAccessibilityConstructor(Self(), [](Dali::Actor actor) {
100 return std::unique_ptr<Dali::Accessibility::Accessible>(
101 new DevelControl::AccessibleImpl(actor, Dali::Accessibility::Role::IMAGE));
104 Adaptor::Get().RegisterProcessor(*this, true);
107 void CanvasView::OnRelayout(const Vector2& size, RelayoutContainer& container)
109 if(!mCanvasRenderer ||
110 !mCanvasRenderer.SetSize(size))
117 void CanvasView::OnSizeSet(const Vector3& targetSize)
119 Control::OnSizeSet(targetSize);
121 if(!mCanvasRenderer ||
122 !mCanvasRenderer.SetSize(Vector2(targetSize)))
126 mSize.width = targetSize.width;
127 mSize.height = targetSize.height;
130 void CanvasView::SetProperty(BaseObject* object, Property::Index propertyIndex, const Property::Value& value)
132 Toolkit::CanvasView canvasView = Toolkit::CanvasView::DownCast(Dali::BaseHandle(object));
135 CanvasView& canvasViewImpl(GetImpl(canvasView));
137 switch(propertyIndex)
139 case Toolkit::CanvasView::Property::VIEW_BOX:
141 Vector2 valueVector2;
142 if(value.Get(valueVector2))
144 canvasViewImpl.SetViewBox(valueVector2);
152 Property::Value CanvasView::GetProperty(BaseObject* object, Property::Index propertyIndex)
154 Property::Value value;
156 Toolkit::CanvasView canvasView = Toolkit::CanvasView::DownCast(Dali::BaseHandle(object));
160 CanvasView& canvasViewImpl(GetImpl(canvasView));
162 switch(propertyIndex)
164 case Toolkit::CanvasView::Property::VIEW_BOX:
166 value = canvasViewImpl.GetViewBox();
174 void CanvasView::Process(bool postProcessor)
176 if(mCanvasRenderer && mCanvasRenderer.IsCanvasChanged() && mSize.width > 0 && mSize.height > 0)
178 AddRasterizationTask();
182 void CanvasView::AddRasterizationTask()
184 CanvasRendererRasterizingTaskPtr newTask = new CanvasRendererRasterizingTask(this, mCanvasRenderer);
186 if(!mCanvasViewRasterizeThread)
188 mCanvasViewRasterizeThread = new CanvasViewRasterizeThread();
189 mCanvasViewRasterizeThread->RasterizationCompletedSignal().Connect(this, &CanvasView::ApplyRasterizedImage);
190 mCanvasViewRasterizeThread->Start();
193 if(mCanvasRenderer.Commit())
195 mCanvasViewRasterizeThread->AddTask(newTask);
199 void CanvasView::ApplyRasterizedImage(Texture rasterizedTexture)
201 if (rasterizedTexture && rasterizedTexture.GetWidth() != 0 && rasterizedTexture.GetHeight() != 0)
205 mTextureSet = TextureSet::New();
206 Geometry geometry = VisualFactoryCache::CreateQuadGeometry();
207 Shader shader = Shader::New(SHADER_CANVAS_VIEW_VERT, SHADER_CANVAS_VIEW_FRAG);
208 Renderer renderer = Renderer::New(geometry, shader);
209 renderer.SetTextures(mTextureSet);
210 renderer.SetProperty(Renderer::Property::BLEND_PRE_MULTIPLIED_ALPHA, true);
211 Self().AddRenderer(renderer);
213 mTextureSet.SetTexture(0, rasterizedTexture);
216 //If there are accumulated changes to CanvasRenderer during Rasterize, Rasterize once again.
217 if(mCanvasRenderer && mCanvasRenderer.IsCanvasChanged())
219 AddRasterizationTask();
223 bool CanvasView::AddDrawable(Dali::CanvasRenderer::Drawable& drawable)
225 if(mCanvasRenderer && mCanvasRenderer.AddDrawable(drawable))
232 bool CanvasView::RemoveDrawable(Dali::CanvasRenderer::Drawable& drawable)
234 if(mCanvasRenderer && mCanvasRenderer.RemoveDrawable(drawable))
241 bool CanvasView::RemoveAllDrawables()
243 if(mCanvasRenderer && mCanvasRenderer.RemoveAllDrawables())
250 bool CanvasView::SetViewBox(const Vector2& viewBox)
252 if(mCanvasRenderer && mCanvasRenderer.SetViewBox(viewBox))
259 const Vector2& CanvasView::GetViewBox()
263 return mCanvasRenderer.GetViewBox();
265 return Vector2::ZERO;
267 } // namespace Internal
268 } // namespace Toolkit