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_TYPE_REGISTRATION_END()
49 } // anonymous namespace
53 CanvasView::CanvasView(const Vector2& viewBox)
54 : Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT)),
55 mCanvasRenderer(CanvasRenderer::New(viewBox)),
59 mCanvasViewRasterizeThread(nullptr)
63 CanvasView::~CanvasView()
65 if(mCanvasViewRasterizeThread)
67 mCanvasViewRasterizeThread->RemoveTask(this);
69 CanvasViewRasterizeThread::TerminateThread(mCanvasViewRasterizeThread);
72 if(Adaptor::IsAvailable())
74 Adaptor::Get().UnregisterProcessor(*this);
78 Toolkit::CanvasView CanvasView::New(const Vector2& viewBox)
80 CanvasView* impl = new CanvasView(viewBox);
82 Toolkit::CanvasView handle = Toolkit::CanvasView(*impl);
84 // Second-phase init of the implementation
85 // This can only be done after the CustomActor connection has been made...
91 /////////////////////////////////////////////////////////////
93 void CanvasView::OnInitialize()
95 // CanvasView can relayout in the OnImageReady, alternative to a signal would be to have a upcall from the Control to CanvasView
96 Dali::Toolkit::Control handle(GetOwner());
98 DevelControl::SetAccessibilityConstructor(Self(), [](Dali::Actor actor) {
99 return std::unique_ptr<Dali::Accessibility::Accessible>(
100 new DevelControl::AccessibleImpl(actor, Dali::Accessibility::Role::IMAGE));
103 Adaptor::Get().RegisterProcessor(*this);
106 void CanvasView::OnRelayout(const Vector2& size, RelayoutContainer& container)
108 if(!mCanvasRenderer ||
109 !mCanvasRenderer.SetSize(size))
116 void CanvasView::OnSizeSet(const Vector3& targetSize)
118 Control::OnSizeSet(targetSize);
120 if(!mCanvasRenderer ||
121 !mCanvasRenderer.SetSize(Vector2(targetSize)))
125 mSize.width = targetSize.width;
126 mSize.height = targetSize.height;
129 void CanvasView::Process(bool postProcessor)
131 if(mCanvasRenderer && mCanvasRenderer.IsCanvasChanged() && mSize.width > 0 && mSize.height > 0)
133 AddRasterizationTask();
137 void CanvasView::AddRasterizationTask()
139 CanvasRendererRasterizingTaskPtr newTask = new CanvasRendererRasterizingTask(this, mCanvasRenderer);
141 if(!mCanvasViewRasterizeThread)
143 mCanvasViewRasterizeThread = new CanvasViewRasterizeThread();
144 mCanvasViewRasterizeThread->RasterizationCompletedSignal().Connect(this, &CanvasView::ApplyRasterizedImage);
145 mCanvasViewRasterizeThread->Start();
148 if(mCanvasRenderer.Commit())
150 mCanvasViewRasterizeThread->AddTask(newTask);
154 void CanvasView::ApplyRasterizedImage(PixelData rasterizedPixelData)
156 if(rasterizedPixelData)
158 auto rasterizedPixelDataWidth = rasterizedPixelData.GetWidth();
159 auto rasterizedPixelDataHeight = rasterizedPixelData.GetHeight();
161 if(rasterizedPixelDataWidth > 0 && rasterizedPixelDataHeight > 0)
163 if(!mTexture || mTexture.GetWidth() != rasterizedPixelDataWidth || mTexture.GetHeight() != rasterizedPixelDataHeight)
165 mTexture = Texture::New(TextureType::TEXTURE_2D, Dali::Pixel::RGBA8888, rasterizedPixelDataWidth, rasterizedPixelDataHeight);
166 mTexture.Upload(rasterizedPixelData);
170 mTextureSet = TextureSet::New();
171 Geometry geometry = VisualFactoryCache::CreateQuadGeometry();
172 Shader shader = Shader::New(SHADER_CANVAS_VIEW_VERT, SHADER_CANVAS_VIEW_FRAG);
173 Renderer renderer = Renderer::New(geometry, shader);
174 renderer.SetTextures(mTextureSet);
175 renderer.SetProperty(Renderer::Property::BLEND_PRE_MULTIPLIED_ALPHA, true);
177 Actor actor = Self();
180 actor.AddRenderer(renderer);
183 mTextureSet.SetTexture(0, mTexture);
188 mTexture.Upload(rasterizedPixelData);
193 //If there are accumulated changes to CanvasRenderer during Rasterize, Rasterize once again.
194 if(mCanvasRenderer && mCanvasRenderer.IsCanvasChanged())
196 AddRasterizationTask();
200 bool CanvasView::AddDrawable(Dali::CanvasRenderer::Drawable& drawable)
202 if(mCanvasRenderer && mCanvasRenderer.AddDrawable(drawable))
208 } // namespace Internal
209 } // namespace Toolkit