TextureDataManager/TextureImageData improved

* Removed RenderTextureProvider which was never used
* Add cleanup method in TextureImageData to reduced memory consumption when
  waiting for the object to be recycled by the resources manager
* Improved the TextureDataManager to keep track for each functor of all the
  associated TextureImages which allows to release TextureImageData that we
  don't need to keep

Change-Id: Id805fc0e7ef8d7c586eb77382bc66cd5e4cc8107
Task-number: QTBUG-47223
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

2 files changed, 15 insertions, 1 deletions

diff --git a/src/render/io/texturedata.cpp b/src/render/io/texturedata.cpp
index 745e0f54e..893862731 100644
--- a/src/render/io/texturedata.cpp
+++ b/src/render/io/texturedata.cpp
@@ -52,6 +52,19 @@ TexImageData::TexImageData()
 {
 }
 
+TexImageData::~TexImageData()
+{
+}
+
+void TexImageData::cleanup()
+{
+    m_width = -1;
+    m_height = -1;
+    m_depth = -1;
+    m_isCompressed = false;
+    m_data.clear();
+}
+
 void TexImageData::setImage(const QImage &image)
 {
     m_width = image.width();
diff --git a/src/render/io/texturedata.h b/src/render/io/texturedata.h
index ae8b14072..a403b0e8c 100644
--- a/src/render/io/texturedata.h
+++ b/src/render/io/texturedata.h
@@ -50,8 +50,9 @@ class QT3DRENDERERSHARED_EXPORT TexImageData
 {
 public:
     TexImageData();
+    ~TexImageData();
 
-    ~TexImageData() {}
+    void cleanup();
 
     bool isCompressed() const
     { return m_isCompressed; }