1 #ifndef __DALI_INTERNAL_RESOURCE_IMAGE_H__
2 #define __DALI_INTERNAL_RESOURCE_IMAGE_H__
5 * Copyright (c) 2015 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
25 #include <dali/public-api/images/resource-image.h>
26 #include <dali/internal/event/images/image-impl.h>
27 #include <dali/internal/event/images/image-factory-cache.h>
28 #include <dali/integration-api/debug.h> // For DALI_LOG_OBJECT_STRING_DECLARATION
37 typedef IntrusivePtr<ResourceImage> ResourceImagePtr;
40 * ResourceImage is an image loaded using a URL, it is an image resource that can be added to actors etc.
42 class ResourceImage : public Image
47 * Creates a pointer to an uninitialized Image object.
48 * @return a pointer to a newly created object.
50 static ResourceImagePtr New();
53 * Creates object and loads image from filesystem
54 * the maximum size of the image is limited by GL_MAX_TEXTURE_SIZE
55 * @param [in] url The URL of the image file.
56 * @param [in] attributes requested parameters for loading (size, scaling etc.)
57 * if width or height is specified as 0, the natural size will be used.
58 * @return a pointer to a newly created object.
60 static ResourceImagePtr New( const std::string& url,
61 const ImageAttributes& attributes );
64 * @copydoc Dali::ResourceImage::GetLoadingState()
66 Dali::LoadingState GetLoadingState() const { return mTicket ? mTicket->GetLoadingState() : ResourceLoading; }
69 * @copydoc Dali::ResourceImage::LoadingFinishedSignal()
71 Dali::ResourceImage::ResourceImageSignal& LoadingFinishedSignal() { return mLoadingFinished; }
74 * Connects a callback function with the object's signals.
75 * @param[in] object The object providing the signal.
76 * @param[in] tracker Used to disconnect the signal.
77 * @param[in] signalName The signal to connect to.
78 * @param[in] functor A newly allocated FunctorDelegate.
79 * @return True if the signal was connected.
80 * @post If a signal was connected, ownership of functor was passed to CallbackBase. Otherwise the caller is responsible for deleting the unused functor.
82 static bool DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor );
85 * Get the attributes of the image.
86 * Only to be used after the image has finished loading.
87 * (Ticket's LoadingSucceeded callback was called)
88 * Reflects the last cached values after a LoadComplete.
89 * If requested width or height was 0, they are replaced by concrete dimensions.
90 * @return a copy of the attributes
92 const ImageAttributes& GetAttributes() const;
95 * @copydoc Dali::ResourceImage::GetUrl()
96 * virtual so deriving class can override it
98 virtual const std::string& GetUrl() const;
101 * @copydoc Dali::ResourceImage::Reload()
106 * @copydoc Dali::Image::GetWidth()
108 virtual unsigned int GetWidth() const;
111 * @copydoc Dali::Image::GetWidth()
113 virtual unsigned int GetHeight() const;
116 * @copydoc Dali::Internal::Image::GetNaturalSize()
118 virtual Vector2 GetNaturalSize() const;
121 * Indicates that the image is used.
123 virtual void Connect();
126 * Indicates that the image is not used anymore.
128 virtual void Disconnect();
130 public: // From ResourceTicketObserver
133 * @copydoc Dali::Internal::ResourceTicketObserver::ResourceLoadingFailed()
135 virtual void ResourceLoadingFailed(const ResourceTicket& ticket);
138 * @copydoc Dali::Internal::ResourceTicketObserver::ResourceLoadingSucceeded()
140 virtual void ResourceLoadingSucceeded(const ResourceTicket& ticket);
145 * A reference counted object may only be deleted by calling Unreference()
147 virtual ~ResourceImage();
150 * Constructor, with default parameters
157 * Helper method to set new resource ticket. Stops observing current ticket if any, and starts observing
158 * the new one or just resets the intrusive pointer.
159 * @param[in] ticket pointer to new resource Ticket or NULL.
161 void SetTicket( ResourceTicket* ticket );
165 ImageFactory& mImageFactory;
167 ImageFactoryCache::RequestPtr mRequest; ///< contains the initially requested attributes for image. Request is reissued when memory was released.
169 Dali::ResourceImage::ResourceImageSignal mLoadingFinished;
171 // Changes scope, should be at end of class
172 DALI_LOG_OBJECT_STRING_DECLARATION;
175 } // namespace Internal
178 * Helper methods for public API.
180 inline Internal::ResourceImage& GetImplementation(Dali::ResourceImage& image)
182 DALI_ASSERT_ALWAYS( image && "Image handle is empty" );
184 BaseObject& handle = image.GetBaseObject();
186 return static_cast<Internal::ResourceImage&>(handle);
189 inline const Internal::ResourceImage& GetImplementation(const Dali::ResourceImage& image)
191 DALI_ASSERT_ALWAYS( image && "Image handle is empty" );
193 const BaseObject& handle = image.GetBaseObject();
195 return static_cast<const Internal::ResourceImage&>(handle);
199 #endif // __DALI_INTERNAL_RESOURCE_IMAGE_H__