qtdeclarative/dist/changes-5.2.0

Qt 5.2 introduces many new features and improvements as well as bugfixes
over the 5.1.x series. For more details, refer to the online documentation
included in this distribution. The documentation is also available online:

  http://qt-project.org/doc/qt-5.2

The Qt version 5.2 series is binary compatible with the 5.1.x series.
Applications compiled for 5.1 will continue to run with 5.2.

Some of the changes listed in this file include issue tracking numbers
corresponding to tasks in the Qt Bug Tracker:

  http://bugreports.qt-project.org/

Each of these identifiers can be entered in the bug tracker to obtain more
information about a particular change.

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*                           General                                        *
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General Improvements
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Third party components
----------------------

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*                   Important Behavior Changes                             *
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 - QSGMaterialShader::compile() will not be called on all instances anymore.
   To enforce the old behavior, set the QSGMaterial::CustomCompilation flag.

 - QSGMaterialShader::activate() and QSGMaterialShader::deactivate() are
   no longer responsible for calling glEnableVertexAttribPointer(),
   glDisableVertexAttribPointer() and binding the shader program. This is
   now done by the renderer. Reimplementations of these functions which
   are not calling the baseclass will need to take this into account.

 - The scene graph now requires a call to QSGNode::markDirty() with the
   flag QSGNode::DirtySubtreeBlocked whenever the state of
   QSGNode::isSubtreeBlocked() is changed.

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*                          Library                                         *
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QtQml
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QtQuick
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- New scene graph renderer should reduce state changes, number of draw calls,
  CPU->GPU bandwidth and generally improve performance.

- Textures in the scene graph can now be entered into an atlas, facilitating
  in better batching in the renderer. Atlas textures are enabled by passing
  QQuickWindow::TextureCanUseAtlas to QQuickWindow::createTextureFromImage()

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*                          Database Drivers                                *
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*                      Platform Specific Changes                           *
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*                      Compiler Specific Changes                           *
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*                          Tools                                           *
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*                          Plugins                                         *
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- A new experimental QML Settings type provides means for applications to
  manage persistent settings in a platform-independent manner. The type is
  made available by importing the Qt.labs.settings module. Note: types in
  the Qt.labs module are not guaranteed to remain compatible in future
  versions.