text: /*=========================================================================
  
     Program: ParaView
     Module:    pqCoreTestUtility.h
  
     Copyright (c) 2005-2008 Sandia Corporation, Kitware Inc.
     All rights reserved.
  
     ParaView is a free software; you can redistribute it and/or modify it
     under the terms of the ParaView license version 1.2. 
  
     See License_v1.2.txt for the full ParaView license.
     A copy of this license can be obtained by contacting
     Kitware Inc.
     28 Corporate Drive
     Clifton Park, NY 12065
     USA
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR
  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  =========================================================================*/
  
  #ifndef _pqCoreTestUtility_h
  #define _pqCoreTestUtility_h
  
  #include "pqCoreModule.h"
  #include "pqTestUtility.h"
  #include <vtkIOStream.h>
  #include <QStringList>
  #include <QSize>
  
  class pqEventPlayer;
  class pqEventTranslator;
  class pqView;
  class QString;
  class vtkImageData;
  class vtkRenderWindow;
  
  /// Provides ParaView-specific functionality for regression testing
  class PQCORE_EXPORT pqCoreTestUtility : public pqTestUtility
  {
    Q_OBJECT
    typedef pqTestUtility Superclass;
  
  public:
    pqCoreTestUtility(QObject* parent = 0);
    ~pqCoreTestUtility();
  
  public:
    /// Returns the absolute path to the PARAVIEW_DATA_ROOT in canonical form
    /// (slashes forward), or empty string
    static QString DataRoot();
  
    /// Returns the temporary test directory in which tests can write
    /// temporary outputs, difference images etc.
    static QString TestDirectory();
  
    /// Saves the contents of a render window to a file for later use as a
    /// reference image
    static bool SaveScreenshot(vtkRenderWindow* RenderWindow, const QString& File);
  
    /// Compares the contents of a render window to a reference image,
    /// returning true iff the two match within a given threshold
    static bool CompareImage(vtkRenderWindow* RenderWindow, 
                             const QString& ReferenceImage, 
                             double Threshold, 
                             ostream& Output, 
                             const QString& TempDirectory);
  
    /// Compares the test image to a reference image,
    /// returning true iff the two match within a given threshold
    static bool CompareImage(vtkImageData* testImage,
                             const QString& ReferenceImage, 
                             double Threshold, 
                             ostream& Output, 
                             const QString& TempDirectory);
  
    static bool CompareImage(const QString& testPNGImage,
                             const QString& ReferenceImage, 
                             double Threshold, 
                             ostream& Output, 
                             const QString& TempDirectory);
  
    /// Compares the contents of any arbitrary QWidget to a reference image,
    /// returning true iff the two match within a given threshold
    static bool CompareImage(QWidget* widget,
                             const QString& referenceImage, 
                             double threshold, 
                             ostream& output,
                             const QString& tempDirectory,
                             const QSize& size = QSize(300, 300));
  
    static bool CompareView(pqView* curView,
      const QString& referenceImage, double threshold, const QString& tempDirectory,
      const QSize& size=QSize());
  
  private:
    QStringList TestFilenames;
  };
  
  #endif // !_pqCoreTestUtility_h
  
  