2 * Copyright (c) 2022 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 "image-view-impl.h"
22 #include <dali/devel-api/scripting/scripting.h>
23 #include <dali/public-api/math/math-utils.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/devel-api/visual-factory/visual-factory.h>
30 #include <dali-toolkit/devel-api/visuals/visual-actions-devel.h>
31 #include <dali-toolkit/internal/controls/control/control-data-impl.h>
32 #include <dali-toolkit/internal/visuals/visual-base-data-impl.h>
33 #include <dali-toolkit/internal/visuals/visual-base-impl.h>
34 #include <dali-toolkit/internal/visuals/visual-string-constants.h>
35 #include <dali-toolkit/public-api/controls/image-view/image-view.h>
36 #include <dali-toolkit/public-api/visuals/visual-properties.h>
46 const Vector4 FULL_TEXTURE_RECT(0.f, 0.f, 1.f, 1.f);
50 return Toolkit::ImageView::New();
53 // Setup properties, signals and actions using the type-registry.
54 DALI_TYPE_REGISTRATION_BEGIN(Toolkit::ImageView, Toolkit::Control, Create);
55 DALI_PROPERTY_REGISTRATION(Toolkit, ImageView, "image", MAP, IMAGE)
56 DALI_PROPERTY_REGISTRATION(Toolkit, ImageView, "preMultipliedAlpha", BOOLEAN, PRE_MULTIPLIED_ALPHA)
58 DALI_ANIMATABLE_PROPERTY_REGISTRATION_WITH_DEFAULT(Toolkit, ImageView, "pixelArea", Vector4(0.f, 0.f, 1.f, 1.f), PIXEL_AREA)
59 DALI_TYPE_REGISTRATION_END()
61 } // anonymous namespace
65 ImageView::ImageView(ControlBehaviour additionalBehaviour)
66 : Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT | additionalBehaviour)),
68 mImageVisualPaddingSetByTransform(false),
69 mImageViewPixelAreaSetByFittingMode(false)
73 ImageView::~ImageView()
77 Toolkit::ImageView ImageView::New(ControlBehaviour additionalBehaviour)
79 ImageView* impl = new ImageView(additionalBehaviour);
81 Toolkit::ImageView handle = Toolkit::ImageView(*impl);
83 // Second-phase init of the implementation
84 // This can only be done after the CustomActor connection has been made...
90 /////////////////////////////////////////////////////////////
92 void ImageView::OnInitialize()
94 // ImageView can relayout in the OnImageReady, alternative to a signal would be to have a upcall from the Control to ImageView
95 Dali::Toolkit::Control handle(GetOwner());
96 handle.ResourceReadySignal().Connect(this, &ImageView::OnResourceReady);
98 Self().SetProperty(DevelControl::Property::ACCESSIBILITY_ROLE, Dali::Accessibility::Role::IMAGE);
101 void ImageView::SetImage(const Property::Map& map)
103 // Comparing a property map is too expensive so just creating a new visual
107 Toolkit::Visual::Base visual = Toolkit::VisualFactory::Get().CreateVisual(mPropertyMap);
110 // Don't set mVisual until it is ready and shown. Getters will still use current visual.
116 if(!mShaderMap.Empty())
118 Internal::Visual::Base& visualImpl = Toolkit::GetImplementation(visual);
119 visualImpl.SetCustomShader(mShaderMap);
122 DevelControl::RegisterVisual(*this, Toolkit::ImageView::Property::IMAGE, visual);
126 // Unregister the exsiting visual
127 DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::IMAGE);
129 // Trigger a size negotiation request that may be needed when unregistering a visual.
133 // Signal that a Relayout may be needed
136 void ImageView::SetImage(const std::string& url, ImageDimensions size)
138 // Don't bother comparing if we had a visual previously, just drop old visual and create new one
141 mPropertyMap.Clear();
143 // Don't set mVisual until it is ready and shown. Getters will still use current visual.
144 Toolkit::Visual::Base visual = Toolkit::VisualFactory::Get().CreateVisual(url, size);
152 if(!mShaderMap.Empty())
154 Internal::Visual::Base& visualImpl = Toolkit::GetImplementation(visual);
155 visualImpl.SetCustomShader(mShaderMap);
158 DevelControl::RegisterVisual(*this, Toolkit::ImageView::Property::IMAGE, visual);
162 // Unregister the exsiting visual
163 DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::IMAGE);
165 // Trigger a size negotiation request that may be needed when unregistering a visual.
169 // Signal that a Relayout may be needed
172 void ImageView::ClearImageVisual()
174 // Clear cached properties
175 mPropertyMap.Clear();
178 // Unregister the exsiting visual
179 DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::IMAGE);
181 // Trigger a size negotiation request that may be needed when unregistering a visual.
185 void ImageView::EnablePreMultipliedAlpha(bool preMultipled)
189 Toolkit::GetImplementation(mVisual).EnablePreMultipliedAlpha(preMultipled);
193 bool ImageView::IsPreMultipliedAlphaEnabled() const
197 return Toolkit::GetImplementation(mVisual).IsPreMultipliedAlphaEnabled();
202 void ImageView::SetDepthIndex(int depthIndex)
206 mVisual.SetDepthIndex(depthIndex);
210 Vector3 ImageView::GetNaturalSize()
214 Vector2 rendererNaturalSize;
215 mVisual.GetNaturalSize(rendererNaturalSize);
218 padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
220 rendererNaturalSize.width += (padding.start + padding.end);
221 rendererNaturalSize.height += (padding.top + padding.bottom);
222 return Vector3(rendererNaturalSize);
225 // if no visual then use Control's natural size
226 return Control::GetNaturalSize();
229 float ImageView::GetHeightForWidth(float width)
232 padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
236 return mVisual.GetHeightForWidth(width) + padding.top + padding.bottom;
240 return Control::GetHeightForWidth(width) + padding.top + padding.bottom;
244 float ImageView::GetWidthForHeight(float height)
247 padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
251 return mVisual.GetWidthForHeight(height) + padding.start + padding.end;
255 return Control::GetWidthForHeight(height) + padding.start + padding.end;
259 void ImageView::OnRelayout(const Vector2& size, RelayoutContainer& container)
261 Control::OnRelayout(size, container);
264 Property::Map transformMap = Property::Map();
266 Extents padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
268 bool zeroPadding = (padding == Extents());
271 mVisual.GetNaturalSize(naturalSize);
273 Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>(
274 Self().GetProperty(Dali::Actor::Property::LAYOUT_DIRECTION).Get<int>());
275 if(Dali::LayoutDirection::RIGHT_TO_LEFT == layoutDirection)
277 std::swap(padding.start, padding.end);
280 // remove padding from the size to know how much is left for the visual
281 Vector2 finalSize = size - Vector2(padding.start + padding.end, padding.top + padding.bottom);
282 Vector2 finalOffset = Vector2(padding.start, padding.top);
284 ApplyFittingMode(finalSize, naturalSize, finalOffset, zeroPadding, transformMap);
286 mVisual.SetTransformAndSize(transformMap, size);
288 // mVisual is not updated util the resource is ready in the case of visual replacement.
289 // in this case, the Property Map must be initialized so that the previous value is not reused.
290 // after mVisual is updated, the correct value will be reset.
291 Toolkit::Visual::Base visual = DevelControl::GetVisual(*this, Toolkit::ImageView::Property::IMAGE);
292 if(visual && visual != mVisual)
294 visual.SetTransformAndSize(Property::Map(), size);
299 void ImageView::OnCreateTransitions(std::vector<std::pair<Dali::Property::Index, Dali::Property::Map>>& sourceProperties,
300 std::vector<std::pair<Dali::Property::Index, Dali::Property::Map>>& destinationProperties,
301 Dali::Toolkit::Control source,
302 Dali::Toolkit::Control destination)
304 // Retrieves image properties to be transitioned.
305 Dali::Property::Map imageSourcePropertyMap, imageDestinationPropertyMap;
306 MakeVisualTransition(imageSourcePropertyMap, imageDestinationPropertyMap, source, destination, Toolkit::ImageView::Property::IMAGE);
307 if(imageSourcePropertyMap.Count() > 0)
309 sourceProperties.push_back(std::pair<Dali::Property::Index, Dali::Property::Map>(Toolkit::ImageView::Property::IMAGE, imageSourcePropertyMap));
310 destinationProperties.push_back(std::pair<Dali::Property::Index, Dali::Property::Map>(Toolkit::ImageView::Property::IMAGE, imageDestinationPropertyMap));
314 void ImageView::OnUpdateVisualProperties(const std::vector<std::pair<Dali::Property::Index, Dali::Property::Map>>& properties)
316 Toolkit::Visual::Base visual = DevelControl::GetVisual(*this, Toolkit::ImageView::Property::IMAGE);
319 Dali::Toolkit::Control handle(GetOwner());
321 for(auto&& data : properties)
323 if(data.first == Toolkit::ImageView::Property::IMAGE)
325 DevelControl::DoAction(handle, Toolkit::ImageView::Property::IMAGE, DevelVisual::Action::UPDATE_PROPERTY, data.second);
332 void ImageView::OnResourceReady(Toolkit::Control control)
334 // Visual ready so update visual attached to this ImageView, following call to RelayoutRequest will use this visual.
335 mVisual = DevelControl::GetVisual(*this, Toolkit::ImageView::Property::IMAGE);
336 // Signal that a Relayout may be needed
339 void ImageView::SetTransformMapForFittingMode(Vector2 finalSize, Vector2 naturalSize, Vector2 finalOffset, Visual::FittingMode fittingMode, Property::Map& transformMap)
343 case Visual::FittingMode::FIT_KEEP_ASPECT_RATIO:
345 auto availableVisualSize = finalSize;
347 // scale to fit the padded area
348 finalSize = naturalSize * std::min((!Dali::EqualsZero(naturalSize.width) ? (availableVisualSize.width / naturalSize.width) : 0),
349 (!Dali::EqualsZero(naturalSize.height) ? (availableVisualSize.height / naturalSize.height) : 0));
351 // calculate final offset within the padded area
352 finalOffset += (availableVisualSize - finalSize) * .5f;
354 // populate the transform map
355 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, finalOffset)
356 .Add(Toolkit::Visual::Transform::Property::SIZE, finalSize);
359 case Visual::FittingMode::OVER_FIT_KEEP_ASPECT_RATIO:
361 mImageViewPixelAreaSetByFittingMode = true;
362 auto availableVisualSize = finalSize;
363 finalSize = naturalSize * std::max((!Dali::EqualsZero(naturalSize.width) ? (availableVisualSize.width / naturalSize.width) : 0.0f),
364 (!Dali::EqualsZero(naturalSize.height) ? (availableVisualSize.height / naturalSize.height) : 0.0f));
366 auto originalOffset = finalOffset;
367 finalOffset += (availableVisualSize - finalSize) * .5f;
369 float x = abs((availableVisualSize.width - finalSize.width) / finalSize.width) * .5f;
370 float y = abs((availableVisualSize.height - finalSize.height) / finalSize.height) * .5f;
371 float widthRatio = 1.f - abs((availableVisualSize.width - finalSize.width) / finalSize.width);
372 float heightRatio = 1.f - abs((availableVisualSize.height - finalSize.height) / finalSize.height);
373 Vector4 pixelArea = Vector4(x, y, widthRatio, heightRatio);
374 Self().SetProperty(Toolkit::ImageView::Property::PIXEL_AREA, pixelArea);
376 // populate the transform map
377 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, originalOffset)
378 .Add(Toolkit::Visual::Transform::Property::SIZE, availableVisualSize);
381 case Visual::FittingMode::CENTER:
383 auto availableVisualSize = finalSize;
384 if(availableVisualSize.width > naturalSize.width && availableVisualSize.height > naturalSize.height)
386 finalSize = naturalSize;
390 finalSize = naturalSize * std::min((!Dali::EqualsZero(naturalSize.width) ? (availableVisualSize.width / naturalSize.width) : 0.0f),
391 (!Dali::EqualsZero(naturalSize.height) ? (availableVisualSize.height / naturalSize.height) : 0.0f));
394 finalOffset += (availableVisualSize - finalSize) * .5f;
396 // populate the transform map
397 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, finalOffset)
398 .Add(Toolkit::Visual::Transform::Property::SIZE, finalSize);
401 case Visual::FittingMode::FILL:
403 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, finalOffset)
404 .Add(Toolkit::Visual::Transform::Property::SIZE, finalSize);
407 case Visual::FittingMode::FIT_WIDTH:
408 case Visual::FittingMode::FIT_HEIGHT:
410 // This FittingMode already converted
416 void ImageView::ApplyFittingMode(Vector2 finalSize, Vector2 naturalSize, Vector2 finalOffset, bool zeroPadding, Property::Map& transformMap)
418 Visual::FittingMode fittingMode = Toolkit::GetImplementation(mVisual).GetFittingMode();
420 // Reset PIXEL_AREA after using OVER_FIT_KEEP_ASPECT_RATIO
421 if(mImageViewPixelAreaSetByFittingMode)
423 Self().SetProperty(Toolkit::ImageView::Property::PIXEL_AREA, FULL_TEXTURE_RECT);
424 mImageViewPixelAreaSetByFittingMode = false;
427 if((!zeroPadding) || // If padding is not zero
428 (fittingMode != Visual::FittingMode::FILL))
430 mImageVisualPaddingSetByTransform = true;
432 // If FittingMode use FIT_WIDTH or FIT_HEIGTH, it need to change proper fittingMode
433 if(fittingMode == Visual::FittingMode::FIT_WIDTH)
435 fittingMode = (finalSize.height / naturalSize.height) < (finalSize.width / naturalSize.width) ? Visual::FittingMode::OVER_FIT_KEEP_ASPECT_RATIO : Visual::FittingMode::FIT_KEEP_ASPECT_RATIO;
437 else if(fittingMode == Visual::FittingMode::FIT_HEIGHT)
439 fittingMode = (finalSize.height / naturalSize.height) < (finalSize.width / naturalSize.width) ? Visual::FittingMode::FIT_KEEP_ASPECT_RATIO : Visual::FittingMode::OVER_FIT_KEEP_ASPECT_RATIO;
442 SetTransformMapForFittingMode(finalSize, naturalSize, finalOffset, fittingMode, transformMap);
444 // Set extra value for applying transformMap
445 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET_POLICY,
446 Vector2(Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE))
447 .Add(Toolkit::Visual::Transform::Property::ORIGIN, Toolkit::Align::TOP_BEGIN)
448 .Add(Toolkit::Visual::Transform::Property::ANCHOR_POINT, Toolkit::Align::TOP_BEGIN)
449 .Add(Toolkit::Visual::Transform::Property::SIZE_POLICY,
450 Vector2(Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE));
452 else if(mImageVisualPaddingSetByTransform && zeroPadding) // Reset offset to zero only if padding applied previously
454 mImageVisualPaddingSetByTransform = false;
455 // Reset the transform map
456 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, Vector2::ZERO)
457 .Add(Toolkit::Visual::Transform::Property::OFFSET_POLICY,
458 Vector2(Toolkit::Visual::Transform::Policy::RELATIVE, Toolkit::Visual::Transform::Policy::RELATIVE))
459 .Add(Toolkit::Visual::Transform::Property::SIZE, Vector2::ONE)
460 .Add(Toolkit::Visual::Transform::Property::SIZE_POLICY,
461 Vector2(Toolkit::Visual::Transform::Policy::RELATIVE, Toolkit::Visual::Transform::Policy::RELATIVE));
465 ///////////////////////////////////////////////////////////
470 void ImageView::SetProperty(BaseObject* object, Property::Index index, const Property::Value& value)
472 Toolkit::ImageView imageView = Toolkit::ImageView::DownCast(Dali::BaseHandle(object));
476 ImageView& impl = GetImpl(imageView);
479 case Toolkit::ImageView::Property::IMAGE:
481 std::string imageUrl;
482 const Property::Map* map;
483 if(value.Get(imageUrl))
485 impl.SetImage(imageUrl, ImageDimensions());
487 // if its not a string then get a Property::Map from the property if possible.
490 map = value.GetMap();
493 // the property map is emtpy map. Unregister visual.
494 if(DALI_UNLIKELY(map->Count() == 0u))
496 impl.ClearImageVisual();
500 Property::Value* shaderValue = map->Find(Toolkit::Visual::Property::SHADER, CUSTOM_SHADER);
501 // set image only if property map contains image information other than custom shader
502 if(map->Count() > 1u || !shaderValue)
506 // the property map contains only the custom shader
507 else if((map->Count() == 1u) && (shaderValue))
509 Property::Map* shaderMap = shaderValue->GetMap();
512 impl.mShaderMap = *shaderMap;
514 if(!impl.mUrl.empty())
516 impl.SetImage(impl.mUrl, impl.mImageSize);
518 else if(!impl.mPropertyMap.Empty())
520 impl.SetImage(impl.mPropertyMap);
528 // invalid property value comes. Unregister visual.
529 impl.ClearImageVisual();
535 case Toolkit::ImageView::Property::PRE_MULTIPLIED_ALPHA:
540 impl.EnablePreMultipliedAlpha(isPre);
548 Property::Value ImageView::GetProperty(BaseObject* object, Property::Index propertyIndex)
550 Property::Value value;
552 Toolkit::ImageView imageview = Toolkit::ImageView::DownCast(Dali::BaseHandle(object));
556 ImageView& impl = GetImpl(imageview);
557 switch(propertyIndex)
559 case Toolkit::ImageView::Property::IMAGE:
561 if(!impl.mUrl.empty())
568 Toolkit::Visual::Base visual = DevelControl::GetVisual(impl, Toolkit::ImageView::Property::IMAGE);
571 visual.CreatePropertyMap(map);
578 case Toolkit::ImageView::Property::PRE_MULTIPLIED_ALPHA:
580 value = impl.IsPreMultipliedAlphaEnabled();
589 } // namespace Internal
590 } // namespace Toolkit