Merge "Fix shader compile crash issue" into devel/master
[platform/core/uifw/dali-toolkit.git] / automated-tests / src / dali-toolkit-internal / utc-Dali-TextureManager.cpp
index d279482..1c8fea2 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2022 Samsung Electronics Co., Ltd.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
 #include <stdlib.h>
 
 #include <dali-toolkit-test-suite-utils.h>
-#include <toolkit-timer.h>
 #include <toolkit-event-thread-callback.h>
-#include <dali-toolkit/internal/visuals/texture-manager-impl.h>
-#include <dali-toolkit/internal/visuals/texture-upload-observer.h>
-#include <dali/devel-api/adaptor-framework/pixel-buffer.h>
+#include <toolkit-timer.h>
+
+#include <dali-toolkit/internal/texture-manager/texture-async-loading-helper.h>
+#include <dali-toolkit/internal/texture-manager/texture-manager-impl.h>
+#include <dali-toolkit/internal/texture-manager/texture-upload-observer.h>
 #include <dali-toolkit/internal/visuals/image-atlas-manager.h>
 #include <dali-toolkit/internal/visuals/visual-factory-impl.h> ///< For VisualFactory's member TextureManager.
+#include <dali/devel-api/adaptor-framework/pixel-buffer.h>
 
 #include <test-encoded-image-buffer.h>
 
@@ -38,7 +40,7 @@ using namespace Dali::Toolkit::Internal;
 
 void utc_dali_toolkit_texture_manager_startup(void)
 {
-  setenv( "LOG_TEXTURE_MANAGER", "3", 1 );
+  setenv("LOG_TEXTURE_MANAGER", "3", 1);
   test_return_value = TET_UNDEF;
 #if defined(ELDBUS_ENABLED)
   DBusWrapper::Install(std::unique_ptr<DBusWrapper>(new TestDBusWrapper));
@@ -52,10 +54,8 @@ void utc_dali_toolkit_texture_manager_cleanup(void)
 
 namespace
 {
-
-const char* TEST_IMAGE_FILE_NAME =  TEST_RESOURCE_DIR "/gallery-small-1.jpg";
-
-}
+const char* TEST_IMAGE_FILE_NAME = TEST_RESOURCE_DIR "/gallery-small-1.jpg";
+const char* TEST_MASK_FILE_NAME  = TEST_RESOURCE_DIR "/mask.png";
 
 class TestObserver : public Dali::Toolkit::TextureUploadObserver
 {
@@ -69,14 +69,14 @@ public:
 
 public:
   TestObserver()
-  : mCompleteType( CompleteType::NOT_COMPLETED ),
+  : mCompleteType(CompleteType::NOT_COMPLETED),
     mLoaded(false),
     mObserverCalled(false),
     mTextureSet()
   {
   }
 
-  virtual void LoadComplete( bool loadSuccess, TextureInformation textureInformation ) override
+  virtual void LoadComplete(bool loadSuccess, TextureInformation textureInformation) override
   {
     if(textureInformation.returnType == TextureUploadObserver::ReturnType::TEXTURE)
     {
@@ -86,17 +86,55 @@ public:
     {
       mCompleteType = CompleteType::LOAD_COMPLETE;
     }
-    mLoaded = loadSuccess;
+    mLoaded         = loadSuccess;
     mObserverCalled = true;
-    mTextureSet = textureInformation.textureSet;
+    mTextureSet     = textureInformation.textureSet;
   }
 
   CompleteType mCompleteType;
-  bool mLoaded;
-  bool mObserverCalled;
-  TextureSet mTextureSet;
+  bool         mLoaded;
+  bool         mObserverCalled;
+  TextureSet   mTextureSet;
 };
 
+class TestObserverRemoveAndGenerateUrl : public TestObserver
+{
+public:
+  TestObserverRemoveAndGenerateUrl(TextureManager* textureManagerPtr)
+  : TestObserver(),
+    mTextureManagerPtr(textureManagerPtr)
+  {
+  }
+
+  virtual void LoadComplete(bool loadSuccess, TextureInformation textureInformation) override
+  {
+    if(textureInformation.returnType == TextureUploadObserver::ReturnType::TEXTURE)
+    {
+      mCompleteType = CompleteType::UPLOAD_COMPLETE;
+    }
+    else
+    {
+      mCompleteType = CompleteType::LOAD_COMPLETE;
+    }
+    mLoaded         = loadSuccess;
+    mObserverCalled = true;
+    mTextureSet     = textureInformation.textureSet;
+
+    // Remove during LoadComplete
+    mTextureManagerPtr->Remove(textureInformation.textureId, nullptr);
+
+    // ...And generate string which using texture id.
+    mGeneratedExternalUrl = mTextureManagerPtr->AddExternalTexture(mTextureSet);
+  }
+
+public:
+  std::string mGeneratedExternalUrl;
+
+protected:
+  TextureManager* mTextureManagerPtr; // Keep the pointer of texture manager.
+};
+
+} // namespace
 
 int UtcTextureManagerRequestLoad(void)
 {
@@ -104,23 +142,23 @@ int UtcTextureManagerRequestLoad(void)
 
   TextureManager textureManager; // Create new texture manager
 
-  TestObserver observer;
-  std::string filename("image.png");
-  auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
-  TextureManager::TextureId textureId = textureManager.RequestLoad(
+  TestObserver              observer;
+  std::string               filename("image.png");
+  auto                      preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  TextureManager::TextureId textureId   = textureManager.RequestLoad(
     filename,
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::NO_ATLAS,
+    TextureManager::UseAtlas::NO_ATLAS,
     &observer,
     true,
     TextureManager::ReloadPolicy::CACHED,
     preMultiply);
 
-  VisualUrl url = textureManager.GetVisualUrl( textureId );
+  VisualUrl url = textureManager.GetVisualUrl(textureId);
 
-  DALI_TEST_EQUALS( url.GetUrl().compare( filename ), 0, TEST_LOCATION );
+  DALI_TEST_EQUALS(url.GetUrl().compare(filename), 0, TEST_LOCATION);
 
   END_TEST;
 }
@@ -131,23 +169,23 @@ int UtcTextureManagerGenerateHash(void)
 
   TextureManager textureManager; // Create new texture manager
 
-  TestObserver observer;
-  std::string filename( "image.png" );
-  auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
-  TextureManager::TextureId textureId = textureManager.RequestLoad(
+  TestObserver              observer;
+  std::string               filename("image.png");
+  auto                      preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  TextureManager::TextureId textureId   = textureManager.RequestLoad(
     filename,
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::USE_ATLAS,
+    TextureManager::UseAtlas::NO_ATLAS,
     &observer,
     true,
     TextureManager::ReloadPolicy::CACHED,
     preMultiply);
 
-  VisualUrl url = textureManager.GetVisualUrl( textureId );
+  VisualUrl url = textureManager.GetVisualUrl(textureId);
 
-  DALI_TEST_EQUALS( url.GetUrl().compare( filename ), 0, TEST_LOCATION );
+  DALI_TEST_EQUALS(url.GetUrl().compare(filename), 0, TEST_LOCATION);
 
   END_TEST;
 }
@@ -155,7 +193,7 @@ int UtcTextureManagerGenerateHash(void)
 int UtcTextureManagerEncodedImageBuffer(void)
 {
   ToolkitTestApplication application;
-  tet_infoline( "UtcTextureManagerEncodedImageBuffer" );
+  tet_infoline("UtcTextureManagerEncodedImageBuffer");
 
   auto  visualFactory  = Toolkit::VisualFactory::Get();
   auto& textureManager = GetImplementation(visualFactory).GetTextureManager(); // Use VisualFactory's texture manager
@@ -164,18 +202,18 @@ int UtcTextureManagerEncodedImageBuffer(void)
   EncodedImageBuffer buffer1 = ConvertFileToEncodedImageBuffer(TEST_IMAGE_FILE_NAME);
   EncodedImageBuffer buffer2 = ConvertFileToEncodedImageBuffer(TEST_IMAGE_FILE_NAME);
 
-  std::string  url1 = textureManager.AddExternalEncodedImageBuffer(buffer1);
-  std::string  url2 = textureManager.AddExternalEncodedImageBuffer(buffer1);
-  std::string  url3 = VisualUrl::CreateBufferUrl(""); ///< Impossible Buffer URL. for coverage
+  std::string url1 = textureManager.AddEncodedImageBuffer(buffer1);
+  std::string url2 = textureManager.AddEncodedImageBuffer(buffer1);
+  std::string url3 = VisualUrl::CreateBufferUrl(""); ///< Impossible Buffer URL. for coverage
 
   // Check if same EncodedImageBuffer get same url
   DALI_TEST_CHECK(url1 == url2);
   // Reduce reference count
-  textureManager.RemoveExternalEncodedImageBuffer(url1);
+  textureManager.RemoveEncodedImageBuffer(url1);
   // Check whethere url1 still valid
   DALI_TEST_CHECK(textureManager.GetEncodedImageBuffer(url1));
 
-  url2 = textureManager.AddExternalEncodedImageBuffer(buffer2);
+  url2 = textureManager.AddEncodedImageBuffer(buffer2);
   // Check if difference EncodedImageBuffer get difference url
   DALI_TEST_CHECK(url1 != url2);
 
@@ -187,26 +225,26 @@ int UtcTextureManagerEncodedImageBuffer(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::NO_ATLAS,
+    TextureManager::UseAtlas::NO_ATLAS,
     &observer1,
     true, ///< orientationCorrection
     TextureManager::ReloadPolicy::CACHED,
     preMultiply);
 
-  DALI_TEST_EQUALS( observer1.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer1.mObserverCalled, false, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( Test::WaitForEventThreadTrigger( 1 ), true, TEST_LOCATION );
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( observer1.mLoaded, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer1.mObserverCalled, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer1.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer1.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
 
   TestObserver observer2;
   // Syncload
@@ -220,9 +258,9 @@ int UtcTextureManagerEncodedImageBuffer(void)
     true, ///< orientationCorrection
     preMultiply);
 
-  DALI_TEST_CHECK( pixelBuffer );
-  DALI_TEST_EQUALS( observer2.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer2.mObserverCalled, false, TEST_LOCATION );
+  DALI_TEST_CHECK(pixelBuffer);
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
 
   // Asyncload
   pixelBuffer = textureManager.LoadPixelBuffer(
@@ -235,23 +273,23 @@ int UtcTextureManagerEncodedImageBuffer(void)
     true, ///< orientationCorrection
     preMultiply);
 
-  DALI_TEST_EQUALS( observer2.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer2.mObserverCalled, false, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( Test::WaitForEventThreadTrigger( 1 ), true, TEST_LOCATION );
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( observer2.mLoaded, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer2.mObserverCalled, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer2.mCompleteType, TestObserver::CompleteType::LOAD_COMPLETE, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer2.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mCompleteType, TestObserver::CompleteType::LOAD_COMPLETE, TEST_LOCATION);
 
-  textureManager.RemoveExternalEncodedImageBuffer(url1);
-  textureManager.RemoveExternalEncodedImageBuffer(url2);
+  textureManager.RemoveEncodedImageBuffer(url1);
+  textureManager.RemoveEncodedImageBuffer(url2);
 
   // Now url1 and url2 is invalid type. mLoaded will return false
 
@@ -261,16 +299,16 @@ int UtcTextureManagerEncodedImageBuffer(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::NO_ATLAS,
+    TextureManager::UseAtlas::NO_ATLAS,
     &observer3,
     true, ///< orientationCorrection
     TextureManager::ReloadPolicy::CACHED,
     preMultiply);
 
   // Load will be success because url1 is cached
-  DALI_TEST_EQUALS( observer3.mLoaded, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer3.mObserverCalled, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer3.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer3.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer3.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
 
   TestObserver observer4;
   textureManager.RequestLoad(
@@ -278,26 +316,26 @@ int UtcTextureManagerEncodedImageBuffer(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::NO_ATLAS,
+    TextureManager::UseAtlas::NO_ATLAS,
     &observer4,
     true, ///< orientationCorrection
     TextureManager::ReloadPolicy::FORCED,
     preMultiply);
 
-  DALI_TEST_EQUALS( observer4.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer4.mObserverCalled, false, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer4.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer4.mObserverCalled, false, TEST_LOCATION);
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( Test::WaitForEventThreadTrigger( 1 ), true, TEST_LOCATION );
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
   // Load will be failed becuase reloadpolicy is forced
-  DALI_TEST_EQUALS( observer4.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer4.mObserverCalled, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer4.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer4.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer4.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer4.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
 
   TestObserver observer5;
   pixelBuffer = textureManager.LoadPixelBuffer(
@@ -311,9 +349,9 @@ int UtcTextureManagerEncodedImageBuffer(void)
     preMultiply);
 
   // Load will be faild because synchronousLoading doesn't use cached texture
-  DALI_TEST_CHECK( !pixelBuffer );
-  DALI_TEST_EQUALS( observer5.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer5.mObserverCalled, false, TEST_LOCATION );
+  DALI_TEST_CHECK(!pixelBuffer);
+  DALI_TEST_EQUALS(observer5.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer5.mObserverCalled, false, TEST_LOCATION);
 
   TestObserver observer6;
   pixelBuffer = textureManager.LoadPixelBuffer(
@@ -326,21 +364,21 @@ int UtcTextureManagerEncodedImageBuffer(void)
     true, ///< orientationCorrection
     preMultiply);
 
-  DALI_TEST_EQUALS( observer6.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer6.mObserverCalled, false, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer6.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer6.mObserverCalled, false, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( Test::WaitForEventThreadTrigger( 1 ), true, TEST_LOCATION );
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
   // Load will be failed because url3 is invalid URL
-  DALI_TEST_EQUALS( observer6.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer6.mObserverCalled, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer6.mCompleteType, TestObserver::CompleteType::LOAD_COMPLETE, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer6.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer6.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer6.mCompleteType, TestObserver::CompleteType::LOAD_COMPLETE, TEST_LOCATION);
 
   END_TEST;
 }
@@ -348,7 +386,7 @@ int UtcTextureManagerEncodedImageBuffer(void)
 int UtcTextureManagerEncodedImageBufferReferenceCount(void)
 {
   ToolkitTestApplication application;
-  tet_infoline( "UtcTextureManagerEncodedImageBuffer check reference count works well" );
+  tet_infoline("UtcTextureManagerEncodedImageBuffer check reference count works well");
 
   auto  visualFactory  = Toolkit::VisualFactory::Get();
   auto& textureManager = GetImplementation(visualFactory).GetTextureManager(); // Use VisualFactory's texture manager
@@ -357,19 +395,19 @@ int UtcTextureManagerEncodedImageBufferReferenceCount(void)
   EncodedImageBuffer buffer1 = ConvertFileToEncodedImageBuffer(TEST_IMAGE_FILE_NAME);
   EncodedImageBuffer buffer2 = ConvertFileToEncodedImageBuffer(TEST_IMAGE_FILE_NAME);
 
-  std::string  url1    = textureManager.AddExternalEncodedImageBuffer(buffer1);
-  std::string  url2    = textureManager.AddExternalEncodedImageBuffer(buffer1);
+  std::string url1 = textureManager.AddEncodedImageBuffer(buffer1);
+  std::string url2 = textureManager.AddEncodedImageBuffer(buffer1);
 
   // Check if same EncodedImageBuffer get same url
   DALI_TEST_CHECK(url1 == url2);
 
   // Reduce reference count
-  textureManager.RemoveExternalEncodedImageBuffer(url1);
+  textureManager.RemoveEncodedImageBuffer(url1);
   // Check whethere url1 still valid
   DALI_TEST_CHECK(textureManager.GetEncodedImageBuffer(url1));
 
   // Reduce reference count
-  textureManager.RemoveExternalEncodedImageBuffer(url1);
+  textureManager.RemoveEncodedImageBuffer(url1);
   // Check whethere url1 is not valid anymore
   DALI_TEST_CHECK(!textureManager.GetEncodedImageBuffer(url1));
 
@@ -378,12 +416,9 @@ int UtcTextureManagerEncodedImageBufferReferenceCount(void)
   textureManager.UseExternalResource(url1);
   DALI_TEST_CHECK(!textureManager.GetEncodedImageBuffer(url1));
 
-  url1 = textureManager.AddExternalEncodedImageBuffer(buffer1);
-  // Check if difference EncodedImageBuffer get difference url
-  // Previous EncodedImageBuffer was deleted, so we get new url even same buffer.
-  DALI_TEST_CHECK(url1 != url2);
+  url1 = textureManager.AddEncodedImageBuffer(buffer1);
 
-  url2 = textureManager.AddExternalEncodedImageBuffer(buffer2);
+  url2 = textureManager.AddEncodedImageBuffer(buffer2);
   // Check if difference EncodedImageBuffer get difference url
   DALI_TEST_CHECK(url1 != url2);
 
@@ -396,29 +431,29 @@ int UtcTextureManagerEncodedImageBufferReferenceCount(void)
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::NO_ATLAS,
+    TextureManager::UseAtlas::NO_ATLAS,
     &observer1,
     true, ///< orientationCorrection
     TextureManager::ReloadPolicy::CACHED,
     preMultiply);
 
-  DALI_TEST_EQUALS( observer1.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer1.mObserverCalled, false, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( Test::WaitForEventThreadTrigger( 1 ), true, TEST_LOCATION );
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( observer1.mLoaded, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer1.mObserverCalled, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer1.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer1.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
 
   // LoadPixelBuffer doen't use cache. url2 will not be cached
-  TestObserver observer2;
+  TestObserver       observer2;
   Devel::PixelBuffer pixelBuffer = textureManager.LoadPixelBuffer(
     url2,
     ImageDimensions(),
@@ -429,24 +464,24 @@ int UtcTextureManagerEncodedImageBufferReferenceCount(void)
     true, ///< orientationCorrection
     preMultiply);
 
-  DALI_TEST_EQUALS( observer2.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer2.mObserverCalled, false, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( Test::WaitForEventThreadTrigger( 1 ), true, TEST_LOCATION );
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( observer2.mLoaded, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer2.mObserverCalled, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer2.mCompleteType, TestObserver::CompleteType::LOAD_COMPLETE, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer2.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mCompleteType, TestObserver::CompleteType::LOAD_COMPLETE, TEST_LOCATION);
 
   // Decrease each url's reference count.
-  textureManager.RemoveExternalEncodedImageBuffer(url1);
-  textureManager.RemoveExternalEncodedImageBuffer(url2);
+  textureManager.RemoveEncodedImageBuffer(url1);
+  textureManager.RemoveEncodedImageBuffer(url2);
 
   // url1 buffer is still have 1 reference count because it is cached.
   // But url2 not valid because it is not cached.
@@ -454,50 +489,49 @@ int UtcTextureManagerEncodedImageBufferReferenceCount(void)
   DALI_TEST_CHECK(!textureManager.GetEncodedImageBuffer(url2));
 
   // Check url1 buffer have 1 reference count because it is cached.
-  textureManager.RemoveExternalEncodedImageBuffer(url1);
+  textureManager.RemoveEncodedImageBuffer(url1);
   DALI_TEST_CHECK(!textureManager.GetEncodedImageBuffer(url1));
 
   END_TEST;
 }
 
-
 int UtcTextureManagerCachingForDifferentLoadingType(void)
 {
   ToolkitTestApplication application;
-  tet_infoline( "UtcTextureManagerCachingForDifferentLoadingType" );
+  tet_infoline("UtcTextureManagerCachingForDifferentLoadingType");
 
   TextureManager textureManager; // Create new texture manager
 
   TestObserver observer1;
-  std::string filename( TEST_IMAGE_FILE_NAME );
-  auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  std::string  filename(TEST_IMAGE_FILE_NAME);
+  auto         preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
   textureManager.RequestLoad(
     filename,
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
     SamplingMode::BOX_THEN_LINEAR,
-    TextureManager::NO_ATLAS,
+    TextureManager::UseAtlas::NO_ATLAS,
     &observer1,
     true,
     TextureManager::ReloadPolicy::CACHED,
     preMultiply);
 
-  DALI_TEST_EQUALS( observer1.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer1.mObserverCalled, false, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( Test::WaitForEventThreadTrigger( 1 ), true, TEST_LOCATION );
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( observer1.mLoaded, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer1.mObserverCalled, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer1.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer1.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
 
-  TestObserver observer2;
+  TestObserver       observer2;
   Devel::PixelBuffer pixelBuffer = textureManager.LoadPixelBuffer(
     filename,
     ImageDimensions(),
@@ -508,20 +542,20 @@ int UtcTextureManagerCachingForDifferentLoadingType(void)
     true,
     preMultiply);
 
-  DALI_TEST_EQUALS( observer2.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer2.mObserverCalled, false, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( Test::WaitForEventThreadTrigger( 1 ), true, TEST_LOCATION );
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( observer2.mLoaded, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer2.mObserverCalled, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer2.mCompleteType, TestObserver::CompleteType::LOAD_COMPLETE, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer2.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mCompleteType, TestObserver::CompleteType::LOAD_COMPLETE, TEST_LOCATION);
 
   END_TEST;
 }
@@ -529,28 +563,162 @@ int UtcTextureManagerCachingForDifferentLoadingType(void)
 int UtcTextureManagerUseInvalidMask(void)
 {
   ToolkitTestApplication application;
-  tet_infoline( "UtcTextureManagerUseInvalidMask" );
+  tet_infoline("UtcTextureManagerUseInvalidMask");
 
   TextureManager textureManager; // Create new texture manager
 
-  TestObserver observer;
-  std::string filename( TEST_IMAGE_FILE_NAME );
-  std::string maskname("");
+  TestObserver                       observer;
+  std::string                        filename(TEST_IMAGE_FILE_NAME);
+  std::string                        maskname("");
   TextureManager::MaskingDataPointer maskInfo = nullptr;
   maskInfo.reset(new TextureManager::MaskingData());
-  maskInfo->mAlphaMaskUrl = maskname;
-  maskInfo->mAlphaMaskId = TextureManager::INVALID_TEXTURE_ID;
-  maskInfo->mCropToMask = true;
+  maskInfo->mAlphaMaskUrl       = maskname;
+  maskInfo->mAlphaMaskId        = TextureManager::INVALID_TEXTURE_ID;
+  maskInfo->mCropToMask         = true;
   maskInfo->mContentScaleFactor = 1.0f;
 
-  auto textureId( TextureManager::INVALID_TEXTURE_ID );
-  Vector4 atlasRect( 0.f, 0.f, 1.f, 1.f );
-  Dali::ImageDimensions atlasRectSize( 0,0 );
-  bool synchronousLoading(false);
-  bool atlasingStatus(false);
-  bool loadingStatus(false);
-  auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
-  ImageAtlasManagerPtr atlasManager = nullptr;
+  auto                          textureId(TextureManager::INVALID_TEXTURE_ID);
+  Vector4                       atlasRect(0.f, 0.f, 1.f, 1.f);
+  Dali::ImageDimensions         atlasRectSize(0, 0);
+  bool                          synchronousLoading(false);
+  bool                          atlasingStatus(false);
+  bool                          loadingStatus(false);
+  auto                          preMultiply         = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  ImageAtlasManagerPtr          atlasManager        = nullptr;
+  Toolkit::AtlasUploadObserver* atlasUploadObserver = nullptr;
+
+  textureManager.LoadTexture(
+    filename,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    maskInfo,
+    synchronousLoading,
+    textureId,
+    atlasRect,
+    atlasRectSize,
+    atlasingStatus,
+    loadingStatus,
+    WrapMode::DEFAULT,
+    WrapMode::DEFAULT,
+    &observer,
+    atlasUploadObserver,
+    atlasManager,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  DALI_TEST_EQUALS(observer.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mObserverCalled, false, TEST_LOCATION);
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(observer.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+
+  END_TEST;
+}
+
+int UtcTextureManagerUseInvalidMaskAndMaskLoadedFirst(void)
+{
+  ToolkitTestApplication application;
+  tet_infoline("UtcTextureManagerUseInvalidMask when normal image loaded first, and mask image loaded first");
+  tet_infoline("Try to check PostLoad works well");
+
+  TextureManager textureManager; // Create new texture manager
+
+  TestObserver                       observer;
+  std::string                        filename(TEST_IMAGE_FILE_NAME);
+  std::string                        maskname("invalid.png");
+  TextureManager::MaskingDataPointer maskInfo = nullptr;
+  maskInfo.reset(new TextureManager::MaskingData());
+  maskInfo->mAlphaMaskUrl       = maskname;
+  maskInfo->mAlphaMaskId        = TextureManager::INVALID_TEXTURE_ID;
+  maskInfo->mCropToMask         = true;
+  maskInfo->mContentScaleFactor = 1.0f;
+
+  auto                          textureId(TextureManager::INVALID_TEXTURE_ID);
+  Vector4                       atlasRect(0.f, 0.f, 1.f, 1.f);
+  Dali::ImageDimensions         atlasRectSize(0, 0);
+  bool                          synchronousLoading(false);
+  bool                          atlasingStatus(false);
+  bool                          loadingStatus(false);
+  auto                          preMultiply         = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  ImageAtlasManagerPtr          atlasManager        = nullptr;
+  Toolkit::AtlasUploadObserver* atlasUploadObserver = nullptr;
+
+  textureManager.LoadTexture(
+    filename,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    maskInfo,
+    synchronousLoading,
+    textureId,
+    atlasRect,
+    atlasRectSize,
+    atlasingStatus,
+    loadingStatus,
+    WrapMode::DEFAULT,
+    WrapMode::DEFAULT,
+    &observer,
+    atlasUploadObserver,
+    atlasManager,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  DALI_TEST_EQUALS(observer.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mObserverCalled, false, TEST_LOCATION);
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(2), true, TEST_LOCATION);
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(observer.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+
+  END_TEST;
+}
+
+int UtcTextureManagerUseInvalidMaskAndMaskLoadedLater(void)
+{
+  ToolkitTestApplication application;
+  tet_infoline("UtcTextureManagerUseInvalidMask when normal image loaded first, and mask image loaded later");
+  tet_infoline("Try to check CheckForWaitingTexture called");
+
+  TextureManager textureManager; // Create new texture manager
+
+  TestObserver                       observer;
+  std::string                        filename(TEST_IMAGE_FILE_NAME);
+  std::string                        maskname("invalid.png");
+  TextureManager::MaskingDataPointer maskInfo = nullptr;
+  maskInfo.reset(new TextureManager::MaskingData());
+  maskInfo->mAlphaMaskUrl       = maskname;
+  maskInfo->mAlphaMaskId        = TextureManager::INVALID_TEXTURE_ID;
+  maskInfo->mCropToMask         = true;
+  maskInfo->mContentScaleFactor = 1.0f;
+
+  auto                          textureId(TextureManager::INVALID_TEXTURE_ID);
+  Vector4                       atlasRect(0.f, 0.f, 1.f, 1.f);
+  Dali::ImageDimensions         atlasRectSize(0, 0);
+  bool                          synchronousLoading(false);
+  bool                          atlasingStatus(false);
+  bool                          loadingStatus(false);
+  auto                          preMultiply         = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  ImageAtlasManagerPtr          atlasManager        = nullptr;
   Toolkit::AtlasUploadObserver* atlasUploadObserver = nullptr;
 
   textureManager.LoadTexture(
@@ -572,23 +740,43 @@ int UtcTextureManagerUseInvalidMask(void)
     atlasManager,
     true,
     TextureManager::ReloadPolicy::CACHED,
-    preMultiply
-  );
+    preMultiply);
 
-  DALI_TEST_EQUALS( observer.mLoaded, false, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer.mObserverCalled, false, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mObserverCalled, false, TEST_LOCATION);
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( Test::WaitForEventThreadTrigger( 1 ), true, TEST_LOCATION );
+  // CAPTION : HARD-CODING for coverage. If you are a good boy, Do not follow this code.
+  {
+    Dali::Devel::PixelBuffer pixelBuffer = textureManager.LoadPixelBuffer(
+      filename,
+      ImageDimensions(),
+      FittingMode::SCALE_TO_FILL,
+      SamplingMode::BOX_THEN_LINEAR,
+      true, ///< synchronousLoading
+      nullptr,
+      true, ///< orientationCorrection
+      preMultiply);
+
+    std::vector<Devel::PixelBuffer> pixelBuffers;
+    pixelBuffers.push_back(pixelBuffer);
+    textureManager.AsyncLoadComplete(textureId, pixelBuffers);
+    std::vector<Devel::PixelBuffer> maskBuffers;
+    textureManager.AsyncLoadComplete(maskInfo->mAlphaMaskId, maskBuffers);
+    textureManager.Remove(maskInfo->mAlphaMaskId, nullptr);
+    textureManager.Remove(textureId, &observer);
+  }
 
   application.SendNotification();
   application.Render();
 
-  DALI_TEST_EQUALS( observer.mLoaded, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer.mObserverCalled, true, TEST_LOCATION );
-  DALI_TEST_EQUALS( observer.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION );
+  DALI_TEST_EQUALS(observer.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(2), true, TEST_LOCATION);
 
   END_TEST;
 }
@@ -596,31 +784,31 @@ int UtcTextureManagerUseInvalidMask(void)
 int UtcTextureManagerSynchronousLoadingFail(void)
 {
   ToolkitTestApplication application;
-  tet_infoline( "UtcTextureManagerSynchronousLoadingFail" );
+  tet_infoline("UtcTextureManagerSynchronousLoadingFail");
 
   TextureManager textureManager; // Create new texture manager
 
-  std::string maskname("");
+  std::string                        maskname("");
   TextureManager::MaskingDataPointer maskInfo = nullptr;
   maskInfo.reset(new TextureManager::MaskingData());
-  maskInfo->mAlphaMaskUrl = maskname;
-  maskInfo->mAlphaMaskId = TextureManager::INVALID_TEXTURE_ID;
-  maskInfo->mCropToMask = true;
+  maskInfo->mAlphaMaskUrl       = maskname;
+  maskInfo->mAlphaMaskId        = TextureManager::INVALID_TEXTURE_ID;
+  maskInfo->mCropToMask         = true;
   maskInfo->mContentScaleFactor = 1.0f;
 
-  std::string filename("dummy");
-  auto textureId( TextureManager::INVALID_TEXTURE_ID );
-  Vector4 atlasRect( 0.f, 0.f, 0.f, 0.f );
-  Dali::ImageDimensions atlasRectSize( 0,0 );
-  bool atlasingStatus(false);
-  bool loadingStatus(false);
-  auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
-  ImageAtlasManagerPtr atlasManager = nullptr;
+  std::string                   filename("dummy");
+  auto                          textureId(TextureManager::INVALID_TEXTURE_ID);
+  Vector4                       atlasRect(0.f, 0.f, 0.f, 0.f);
+  Dali::ImageDimensions         atlasRectSize(0, 0);
+  bool                          atlasingStatus(false);
+  bool                          loadingStatus(false);
+  auto                          preMultiply         = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  ImageAtlasManagerPtr          atlasManager        = nullptr;
   Toolkit::AtlasUploadObserver* atlasUploadObserver = nullptr;
 
   // load image synchronously.
   TestObserver observer;
-  TextureSet textureSet = textureManager.LoadTexture(
+  TextureSet   textureSet = textureManager.LoadTexture(
     filename,
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
@@ -639,11 +827,10 @@ int UtcTextureManagerSynchronousLoadingFail(void)
     atlasManager,
     true,
     TextureManager::ReloadPolicy::CACHED,
-    preMultiply
-  );
+    preMultiply);
 
   DALI_TEST_EQUALS(loadingStatus, false, TEST_LOCATION);
-  DALI_TEST_CHECK(!textureSet);  // texture loading fail.
+  DALI_TEST_CHECK(!textureSet);                                     // texture loading fail.
   DALI_TEST_CHECK(textureId == TextureManager::INVALID_TEXTURE_ID); // invalid texture id is returned.
 
   END_TEST;
@@ -652,32 +839,32 @@ int UtcTextureManagerSynchronousLoadingFail(void)
 int UtcTextureManagerCachingSynchronousLoading(void)
 {
   ToolkitTestApplication application;
-  tet_infoline( "UtcTextureManagerCachingSynchronousLoading" );
+  tet_infoline("UtcTextureManagerCachingSynchronousLoading");
 
   TextureManager textureManager; // Create new texture manager
 
-  std::string filename( TEST_IMAGE_FILE_NAME );
+  std::string filename(TEST_IMAGE_FILE_NAME);
 
-  std::string maskname("");
+  std::string                        maskname("");
   TextureManager::MaskingDataPointer maskInfo = nullptr;
   maskInfo.reset(new TextureManager::MaskingData());
-  maskInfo->mAlphaMaskUrl = maskname;
-  maskInfo->mAlphaMaskId = TextureManager::INVALID_TEXTURE_ID;
-  maskInfo->mCropToMask = true;
+  maskInfo->mAlphaMaskUrl       = maskname;
+  maskInfo->mAlphaMaskId        = TextureManager::INVALID_TEXTURE_ID;
+  maskInfo->mCropToMask         = true;
   maskInfo->mContentScaleFactor = 1.0f;
 
-  Vector4 atlasRect( 0.f, 0.f, 0.f, 0.f );
-  Dali::ImageDimensions atlasRectSize( 0,0 );
-  bool atlasingStatus(false);
-  bool loadingStatus(false);
-  auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
-  ImageAtlasManagerPtr atlasManager = nullptr;
+  Vector4                       atlasRect(0.f, 0.f, 0.f, 0.f);
+  Dali::ImageDimensions         atlasRectSize(0, 0);
+  bool                          atlasingStatus(false);
+  bool                          loadingStatus(false);
+  auto                          preMultiply         = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  ImageAtlasManagerPtr          atlasManager        = nullptr;
   Toolkit::AtlasUploadObserver* atlasUploadObserver = nullptr;
 
   // load image synchronously.
   TestObserver observer;
-  auto textureId( TextureManager::INVALID_TEXTURE_ID );
-  TextureSet textureSet = textureManager.LoadTexture(
+  auto         textureId(TextureManager::INVALID_TEXTURE_ID);
+  TextureSet   textureSet = textureManager.LoadTexture(
     filename,
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
@@ -696,21 +883,19 @@ int UtcTextureManagerCachingSynchronousLoading(void)
     atlasManager,
     true,
     TextureManager::ReloadPolicy::CACHED,
-    preMultiply
-  );
+    preMultiply);
 
   DALI_TEST_EQUALS(loadingStatus, false, TEST_LOCATION);
-  DALI_TEST_CHECK(textureSet);  // texture is loaded.
+  DALI_TEST_CHECK(textureSet); // texture is loaded.
 
   // observer isn't called in synchronous loading.
   DALI_TEST_EQUALS(observer.mLoaded, false, TEST_LOCATION);
   DALI_TEST_EQUALS(observer.mObserverCalled, false, TEST_LOCATION);
 
-
   // load same image asynchronously.
   TestObserver asyncObserver;
-  auto asyncTextureId( TextureManager::INVALID_TEXTURE_ID );
-  loadingStatus = false;
+  auto         asyncTextureId(TextureManager::INVALID_TEXTURE_ID);
+  loadingStatus              = false;
   TextureSet asyncTextureSet = textureManager.LoadTexture(
     filename,
     ImageDimensions(),
@@ -730,12 +915,11 @@ int UtcTextureManagerCachingSynchronousLoading(void)
     atlasManager,
     true,
     TextureManager::ReloadPolicy::CACHED,
-    preMultiply
-  );
+    preMultiply);
 
   DALI_TEST_EQUALS(asyncTextureId, textureId, TEST_LOCATION); // texture is loaded.
   DALI_TEST_EQUALS(loadingStatus, false, TEST_LOCATION);
-  DALI_TEST_CHECK(asyncTextureSet);  // Cached texture.
+  DALI_TEST_CHECK(asyncTextureSet); // Cached texture.
 
   // observer is directly called because textureSet is retrieved by cache.
   DALI_TEST_EQUALS(asyncObserver.mLoaded, true, TEST_LOCATION);
@@ -747,32 +931,32 @@ int UtcTextureManagerCachingSynchronousLoading(void)
 int UtcTextureManagerAsyncSyncAsync(void)
 {
   ToolkitTestApplication application;
-  tet_infoline( "UtcTextureManagerAsyncSyncAsync" );
+  tet_infoline("UtcTextureManagerAsyncSyncAsync");
 
   TextureManager textureManager; // Create new texture manager
 
-  std::string filename( TEST_IMAGE_FILE_NAME );
+  std::string filename(TEST_IMAGE_FILE_NAME);
 
-  std::string maskname("");
+  std::string                        maskname("");
   TextureManager::MaskingDataPointer maskInfo = nullptr;
   maskInfo.reset(new TextureManager::MaskingData());
-  maskInfo->mAlphaMaskUrl = maskname;
-  maskInfo->mAlphaMaskId = TextureManager::INVALID_TEXTURE_ID;
-  maskInfo->mCropToMask = true;
+  maskInfo->mAlphaMaskUrl       = maskname;
+  maskInfo->mAlphaMaskId        = TextureManager::INVALID_TEXTURE_ID;
+  maskInfo->mCropToMask         = true;
   maskInfo->mContentScaleFactor = 1.0f;
 
-  Vector4 atlasRect( 0.f, 0.f, 0.f, 0.f );
-  Dali::ImageDimensions atlasRectSize( 0,0 );
-  bool atlasingStatus(false);
-  auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
-  ImageAtlasManagerPtr atlasManager = nullptr;
+  Vector4                       atlasRect(0.f, 0.f, 0.f, 0.f);
+  Dali::ImageDimensions         atlasRectSize(0, 0);
+  bool                          atlasingStatus(false);
+  auto                          preMultiply         = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  ImageAtlasManagerPtr          atlasManager        = nullptr;
   Toolkit::AtlasUploadObserver* atlasUploadObserver = nullptr;
 
   // load image asynchronously.
   TestObserver asyncObserver1;
-  auto asyncTextureId1( TextureManager::INVALID_TEXTURE_ID );
-  bool asyncLoadingStatus1 = false;
-  TextureSet asyncTextureSet1 = textureManager.LoadTexture(
+  auto         asyncTextureId1(TextureManager::INVALID_TEXTURE_ID);
+  bool         asyncLoadingStatus1 = false;
+  TextureSet   asyncTextureSet1    = textureManager.LoadTexture(
     filename,
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
@@ -791,22 +975,20 @@ int UtcTextureManagerAsyncSyncAsync(void)
     atlasManager,
     true,
     TextureManager::ReloadPolicy::CACHED,
-    preMultiply
-  );
+    preMultiply);
 
   DALI_TEST_EQUALS(asyncLoadingStatus1, true, TEST_LOCATION); // texture is loading now.
-  DALI_TEST_CHECK(!asyncTextureSet1);  // texture is not loaded yet.
+  DALI_TEST_CHECK(!asyncTextureSet1);                         // texture is not loaded yet.
 
   // observer is still not called.
   DALI_TEST_EQUALS(asyncObserver1.mLoaded, false, TEST_LOCATION);
   DALI_TEST_EQUALS(asyncObserver1.mObserverCalled, false, TEST_LOCATION);
 
-
   // load same image synchronously just after asynchronous loading.
   TestObserver syncObserver;
-  auto textureId( TextureManager::INVALID_TEXTURE_ID );
-  bool syncLoadingStatus = false;
-  TextureSet syncTextureSet = textureManager.LoadTexture(
+  auto         textureId(TextureManager::INVALID_TEXTURE_ID);
+  bool         syncLoadingStatus = false;
+  TextureSet   syncTextureSet    = textureManager.LoadTexture(
     filename,
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
@@ -825,12 +1007,11 @@ int UtcTextureManagerAsyncSyncAsync(void)
     atlasManager,
     true,
     TextureManager::ReloadPolicy::CACHED,
-    preMultiply
-  );
+    preMultiply);
 
   DALI_TEST_EQUALS(asyncTextureId1, textureId, TEST_LOCATION); // texture is loaded.
-  DALI_TEST_EQUALS(syncLoadingStatus, false, TEST_LOCATION); // texture is loaded.
-  DALI_TEST_CHECK(syncTextureSet);  // texture is loaded.
+  DALI_TEST_EQUALS(syncLoadingStatus, false, TEST_LOCATION);   // texture is loaded.
+  DALI_TEST_CHECK(syncTextureSet);                             // texture is loaded.
 
   // syncObserver isn't called in synchronous loading.
   DALI_TEST_EQUALS(syncObserver.mLoaded, false, TEST_LOCATION);
@@ -840,13 +1021,11 @@ int UtcTextureManagerAsyncSyncAsync(void)
   DALI_TEST_EQUALS(asyncObserver1.mLoaded, false, TEST_LOCATION);
   DALI_TEST_EQUALS(asyncObserver1.mObserverCalled, false, TEST_LOCATION);
 
-
-
   // load image asynchronously.
   TestObserver asyncObserver2;
-  auto asyncTextureId2( TextureManager::INVALID_TEXTURE_ID );
-  bool asyncLoadingStatus2 = false;
-  TextureSet asyncTextureSet2 = textureManager.LoadTexture(
+  auto         asyncTextureId2(TextureManager::INVALID_TEXTURE_ID);
+  bool         asyncLoadingStatus2 = false;
+  TextureSet   asyncTextureSet2    = textureManager.LoadTexture(
     filename,
     ImageDimensions(),
     FittingMode::SCALE_TO_FILL,
@@ -865,28 +1044,27 @@ int UtcTextureManagerAsyncSyncAsync(void)
     atlasManager,
     true,
     TextureManager::ReloadPolicy::CACHED,
-    preMultiply
-  );
+    preMultiply);
 
   DALI_TEST_EQUALS(asyncLoadingStatus2, false, TEST_LOCATION); // texture is loaded by previous sync request
-  DALI_TEST_CHECK(asyncTextureSet2); // texture is loaded
-  DALI_TEST_CHECK(asyncTextureSet2 == syncTextureSet);  // check loaded two texture is same.
+  DALI_TEST_CHECK(asyncTextureSet2);                           // texture is loaded
+  DALI_TEST_CHECK(asyncTextureSet2 == syncTextureSet);         // check loaded two texture is same.
 
   // observer is called synchronously because the texture is cached.
   DALI_TEST_EQUALS(asyncObserver2.mLoaded, true, TEST_LOCATION);
   DALI_TEST_EQUALS(asyncObserver2.mObserverCalled, true, TEST_LOCATION);
 
-  asyncObserver2.mLoaded = false;
+  asyncObserver2.mLoaded         = false;
   asyncObserver2.mObserverCalled = false;
 
   application.SendNotification();
   application.Render();
 
   // Requested asynchronous loading at first is finished now and async observer is called now.
-  DALI_TEST_EQUALS( Test::WaitForEventThreadTrigger( 1 ), true, TEST_LOCATION );
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
   DALI_TEST_EQUALS(asyncObserver1.mLoaded, true, TEST_LOCATION);
   DALI_TEST_EQUALS(asyncObserver1.mObserverCalled, true, TEST_LOCATION);
-  DALI_TEST_CHECK(asyncObserver1.mTextureSet == asyncTextureSet2);  // check loaded two texture is same.
+  DALI_TEST_CHECK(asyncObserver1.mTextureSet == asyncTextureSet2); // check loaded two texture is same.
 
   // asyncObserver2 was already called so it isn't called here.
   DALI_TEST_EQUALS(asyncObserver2.mLoaded, false, TEST_LOCATION);
@@ -894,3 +1072,176 @@ int UtcTextureManagerAsyncSyncAsync(void)
 
   END_TEST;
 }
+
+int UtcTextureManagerQueueRemoveDuringObserve(void)
+{
+  ToolkitTestApplication application;
+  tet_infoline("UtcTextureManagerQueueRemoveDuringObserve");
+
+  TextureManager textureManager; // Create new texture manager
+
+  TestObserverRemoveAndGenerateUrl observer(&textureManager); // special observer for this UTC.
+
+  std::string filename(TEST_IMAGE_FILE_NAME);
+  auto        preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+
+  TextureManager::TextureId textureId = textureManager.RequestLoad(
+    filename,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    TextureManager::UseAtlas::NO_ATLAS,
+    &observer,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  DALI_TEST_EQUALS(observer.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mObserverCalled, false, TEST_LOCATION);
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(1), true, TEST_LOCATION);
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(observer.mLoaded, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+
+  tet_printf("loaded textureId is %d, generated url is %s\n", static_cast<int>(textureId), observer.mGeneratedExternalUrl.c_str());
+
+  DALI_TEST_CHECK(static_cast<int>(textureId) != std::stoi(VisualUrl::GetLocation(observer.mGeneratedExternalUrl))); // Check we don't reuse textureId during observe
+
+  // Decrease external texture reference count who observer created
+  textureManager.RemoveExternalTexture(observer.mGeneratedExternalUrl);
+
+  application.SendNotification();
+  application.Render();
+
+  END_TEST;
+}
+
+int UtcTextureManagerRemoveDuringApplyMasking(void)
+{
+  ToolkitTestApplication application;
+  tet_infoline("UtcTextureManagerRemoveDuringApplyMasking");
+
+  TextureManager textureManager; // Create new texture manager
+
+  TestObserver observer1;
+  TestObserver observer2;
+
+  std::string                        filename(TEST_IMAGE_FILE_NAME);
+  std::string                        maskname(TEST_MASK_FILE_NAME);
+  TextureManager::MaskingDataPointer maskInfo = nullptr;
+  maskInfo.reset(new TextureManager::MaskingData());
+  maskInfo->mAlphaMaskUrl       = maskname;
+  maskInfo->mAlphaMaskId        = TextureManager::INVALID_TEXTURE_ID;
+  maskInfo->mCropToMask         = true;
+  maskInfo->mContentScaleFactor = 1.0f;
+
+  auto                          textureId1(TextureManager::INVALID_TEXTURE_ID);
+  Vector4                       atlasRect(0.f, 0.f, 1.f, 1.f);
+  Dali::ImageDimensions         atlasRectSize(0, 0);
+  bool                          synchronousLoading(false);
+  bool                          atlasingStatus(false);
+  bool                          loadingStatus(false);
+  auto                          preMultiply         = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
+  ImageAtlasManagerPtr          atlasManager        = nullptr;
+  Toolkit::AtlasUploadObserver* atlasUploadObserver = nullptr;
+
+  textureManager.LoadTexture(
+    filename,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    maskInfo,
+    synchronousLoading,
+    textureId1,
+    atlasRect,
+    atlasRectSize,
+    atlasingStatus,
+    loadingStatus,
+    WrapMode::DEFAULT,
+    WrapMode::DEFAULT,
+    &observer1,
+    atlasUploadObserver,
+    atlasManager,
+    true,
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply);
+
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
+
+  application.SendNotification();
+  application.Render();
+
+  // Load image and mask image.
+  // Now, LoadState become MASK_APPLYING
+  DALI_TEST_EQUALS(Test::WaitForEventThreadTrigger(2), true, TEST_LOCATION);
+
+  tet_printf("Current textureId1:%d's state become MASK_APPLYING\n", static_cast<int>(textureId1));
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
+
+  // Remove current textureId1. and request new texture again.
+  textureManager.Remove(textureId1, &observer1);
+  auto textureId2 = textureManager.RequestLoad(
+    filename,
+    ImageDimensions(),
+    FittingMode::SCALE_TO_FILL,
+    SamplingMode::BOX_THEN_LINEAR,
+    TextureManager::UseAtlas::NO_ATLAS,
+    &observer2,
+    true, ///< orientationCorrection
+    TextureManager::ReloadPolicy::CACHED,
+    preMultiply,
+    synchronousLoading);
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
+
+  tet_printf("textureId1:%d removed and textureId2:%d requested\n", static_cast<int>(textureId1), static_cast<int>(textureId2));
+
+  // ApplyMask event come back, and do nothing.
+  // CAPTION : HARD-CODING.
+  {
+    std::vector<Devel::PixelBuffer> pixelBuffers;
+    textureManager.AsyncLoadComplete(textureId1, pixelBuffers);
+    textureManager.Remove(maskInfo->mAlphaMaskId, nullptr);
+  }
+
+  application.SendNotification();
+  application.Render();
+
+  DALI_TEST_EQUALS(observer1.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer1.mObserverCalled, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mObserverCalled, false, TEST_LOCATION);
+
+  // CAPTION : HARD-CODING.
+  {
+    std::vector<Devel::PixelBuffer> pixelBuffers;
+    textureManager.AsyncLoadComplete(textureId2, pixelBuffers);
+    textureManager.Remove(textureId2, &observer2);
+  }
+
+  DALI_TEST_EQUALS(observer2.mLoaded, false, TEST_LOCATION); ///< Note that we call AsyncLoadComplete hardly with empty pixelbuffer.
+  DALI_TEST_EQUALS(observer2.mObserverCalled, true, TEST_LOCATION);
+  DALI_TEST_EQUALS(observer2.mCompleteType, TestObserver::CompleteType::UPLOAD_COMPLETE, TEST_LOCATION);
+
+  END_TEST;
+}