Request load texture again if the observer is destroyed during loading.

[platform/core/uifw/dali-toolkit.git] / dali-toolkit / internal / visuals / npatch-loader.h

diff --git a/dali-toolkit/internal/visuals/npatch-loader.h b/dali-toolkit/internal/visuals/npatch-loader.h
index 58bd73f..51f2482 100644 (file)
--- a/dali-toolkit/internal/visuals/npatch-loader.h
+++ b/dali-toolkit/internal/visuals/npatch-loader.h
@@ -48,6 +48,18 @@ namespace Internal
 class NPatchLoader
 {
 public:
+  /**
+   * Observer class to inform the npatch image is loaded.
+   */
+  class NPatchLoadObserver: public Dali::Toolkit::TextureUploadObserver
+  {
+  public:
+    /**
+     * Informs observer when the npatch image is loaded.
+     * @param[in] preMultiplied True if the image had pre-multiplied alpha applied
+     */
+    virtual void NPatchLoadComplete ( bool preMultiplied ) = 0;
+  };
 
   enum
   {
@@ -63,18 +75,27 @@ public:
       croppedWidth( 0 ),
       croppedHeight( 0 ),
       border( 0, 0, 0, 0 ),
-      loadCompleted( false )
+      loadCompleted( false ),
+      renderingMap{ nullptr }
     {}
 
-    std::string url;                              ///< Url of the N-Patch
-    TextureSet textureSet;                        ///< Texture containing the cropped image
-    NPatchUtility::StretchRanges stretchPixelsX;  ///< X stretch pixels
-    NPatchUtility::StretchRanges stretchPixelsY;  ///< Y stretch pixels
-    std::size_t hash;                             ///< Hash code for the Url
-    uint32_t croppedWidth;                        ///< Width of the cropped middle part of N-patch
-    uint32_t croppedHeight;                       ///< Height of the cropped middle part of N-patch
-    Rect< int > border;                           ///< The size of the border
-    bool loadCompleted;                           ///< True if the data loading is completed
+    ~Data();
+
+    using ObserverListType = Dali::Vector< NPatchLoadObserver* >;
+
+    TextureUploadObserver* textureObserver;              ///< TextureUploadObserver that requests to load texture.
+    ObserverListType observerList;                       ///< Container used to store all observer clients of this Texture
+    std::string url;                                     ///< Url of the N-Patch
+    TextureSet textureSet;                               ///< Texture containing the cropped image
+    NPatchUtility::StretchRanges stretchPixelsX;         ///< X stretch pixels
+    NPatchUtility::StretchRanges stretchPixelsY;         ///< Y stretch pixels
+    std::size_t hash;                                    ///< Hash code for the Url
+    uint32_t croppedWidth;                               ///< Width of the cropped middle part of N-patch
+    uint32_t croppedHeight;                              ///< Height of the cropped middle part of N-patch
+    Rect< int > border;                                  ///< The size of the border
+    bool preMultiplyOnLoad;                              ///< Whether to multiply alpha into color channels on load 
+    bool loadCompleted;                                  ///< True if the data loading is completed
+    void* renderingMap;                                  ///< NPatch rendering data
   };
 
 public:
@@ -93,7 +114,7 @@ public:
    * @brief Retrieve a texture matching the n-patch url.
    *
    * @param [in] textureManager that will be used to loading image
-   * @param [in] textureObserver The NPatchVisual that requested loading.
+   * @param [in] nPatchObserver The NPatchVisual that requested loading.
    * @param [in] url to retrieve
    * @param [in] border The border size of the image
    * @param [in,out] preMultiplyOnLoad True if the image color should be multiplied by it's alpha. Set to false if the
@@ -101,15 +122,16 @@ public:
    * @param [in] synchronousLoading True if the image will be loaded in synchronous time.
    * @return id of the texture.
    */
-  std::size_t Load( TextureManager& textureManager, TextureUploadObserver* textureObserver, const std::string& url, const Rect< int >& border, bool& preMultiplyOnLoad, bool synchronousLoading );
+  std::size_t Load( TextureManager& textureManager, NPatchLoadObserver* nPatchObserver, const std::string& url, const Rect< int >& border, bool& preMultiplyOnLoad, bool synchronousLoading );
 
   /**
    * @brief Set loaded PixelBuffer and its information
    *
    * @param [in] id cache data id
    * @param [in] pixelBuffer of loaded image
+   * @param [in] preMultiplied True if the image had pre-multiplied alpha applied
    */
-  void SetNPatchData( std::size_t id, Devel::PixelBuffer& pixelBuffer );
+  void SetNPatchData( std::size_t id, Devel::PixelBuffer& pixelBuffer, bool preMultiplied );
 
   /**
    * @brief Retrieve N patch data matching to an id
@@ -119,6 +141,8 @@ public:
    */
   bool GetNPatchData( std::size_t id, const Data*& data );
 
+  void Remove( std::size_t id, TextureManager& textureManager, NPatchLoadObserver* nPatchObserver, bool synchronousLoading );
+
 protected:
 
   /**