Texture property update: notify frontend only when properties have changed

Change-Id: Ic69b25c92ff45f349715a47b19c3f3c1c40eabea
Reviewed-by: Mike Krus <mike.krus@kdab.com>

src/render/renderers/opengl/renderer/renderer.cpp

@@ -1271,7 +1271,8 @@ void Renderer::updateGLResources()
                 // Gather these information and store them to be distributed by a change next frame
                 const QNodeIdVector referenceTextureIds = glTextureManager->referencedTextureIds(glTexture);
                 // Store properties and referenceTextureIds
-                m_updatedTextureProperties.push_back({info.properties, referenceTextureIds});
+                if (info.wasUpdated)
+                    m_updatedTextureProperties.push_back({info.properties, referenceTextureIds});
             }
         }
     }

src/render/renderers/opengl/textures/gltexture.cpp

@@ -211,6 +211,7 @@ GLTexture::TextureUpdateInfo GLTexture::createOrUpdateGLTexture()
     if (testDirtyFlag(Properties)) {
         delete m_gl;
         m_gl = nullptr;
+        textureInfo.wasUpdated = true;
     }
 
 

src/render/renderers/opengl/textures/gltexture_p.h

@@ -143,6 +143,7 @@ public:
     struct TextureUpdateInfo
     {
         QOpenGLTexture *texture = nullptr;
+        bool wasUpdated = false;
         TextureProperties properties;
     };