qgsrenderchecker.h

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/***************************************************************************
     qgsrenderchecker.h - check maprender output against an expected image
                     --------------------------------------
               Date                 : 18 Jan 2008
               Copyright            : (C) 2008 by Tim Sutton
               email                : tim  @ linfiniti.com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSRENDERCHECKER_H
#define QGSRENDERCHECKER_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include <QDir>
#include <QString>
#include <QRegExp>
#include <QList>
 
#include "qgslogger.h"
#include "qgsmapsettings.h"
#include "qgsdartmeasurement.h"
 
class QImage;
 
class CORE_EXPORT QgsRenderChecker
{
  public:
 
    QgsRenderChecker() = default;
 
    QString controlImagePath() const;
 
    QString report() { return mReport; }
 
    float matchPercent()
    {
      return static_cast<float>( mMismatchCount ) /
             static_cast<float>( mMatchTarget ) * 100;
    }
    unsigned int mismatchCount() { return mMismatchCount; }
    unsigned int matchTarget() { return mMatchTarget; }
    //only records time for actual render part
    int elapsedTime() { return mElapsedTime; }
    void setElapsedTimeTarget( int target ) { mElapsedTimeTarget = target; }
 
    void setControlName( const QString &name );
 
    void setControlPathPrefix( const QString &name ) { mControlPathPrefix = name + '/'; }
 
    void setControlPathSuffix( const QString &name );
 
    QString imageToHash( const QString &imageFile );
 
    void setRenderedImage( const QString &imageFileName ) { mRenderedImageFile = imageFileName; }
 
    QString renderedImage() { return mRenderedImageFile; }
 
    void setMapSettings( const QgsMapSettings &mapSettings );
 
    void setColorTolerance( unsigned int colorTolerance ) { mColorTolerance = colorTolerance; }
 
    void setSizeTolerance( int xTolerance, int yTolerance ) { mMaxSizeDifferenceX = xTolerance; mMaxSizeDifferenceY = yTolerance; }
 
    bool runTest( const QString &testName, unsigned int mismatchCount = 0 );
 
    bool compareImages( const QString &testName, unsigned int mismatchCount = 0, const QString &renderedImageFile = QString() );
 
    bool isKnownAnomaly( const QString &diffImageFile );
 
    static void drawBackground( QImage *image );
 
    QString expectedImageFile() const { return mExpectedImageFile; }
 
    void enableDashBuffering( bool enable ) { mBufferDashMessages = enable; }
 
    QVector<QgsDartMeasurement> dartMeasurements() const { return mDashMessages; }
 
  protected:
    QString mReport;
    unsigned int mMatchTarget = 0;
    int mElapsedTime = 0;
    QString mRenderedImageFile;
    QString mExpectedImageFile;
 
  private:
    void emitDashMessage( const QgsDartMeasurement &dashMessage );
    void emitDashMessage( const QString &name, QgsDartMeasurement::Type type, const QString &value );
 
    QString mControlName;
    unsigned int mMismatchCount = 0;
    unsigned int mColorTolerance = 0;
    int mMaxSizeDifferenceX = 0;
    int mMaxSizeDifferenceY = 0;
    int mElapsedTimeTarget = 0;
    QgsMapSettings mMapSettings;
    QString mControlPathPrefix;
    QString mControlPathSuffix;
    QVector<QgsDartMeasurement> mDashMessages;
    bool mBufferDashMessages = false;
}; // class QgsRenderChecker
 
 
inline bool compareWkt( const QString &a, const QString &b, double tolerance = 0.000001 )
{
  QgsDebugMsg( QStringLiteral( "a:%1 b:%2 tol:%3" ).arg( a, b ).arg( tolerance ) );
  QRegExp re( "-?\\d+(?:\\.\\d+)?(?:[eE]\\d+)?" );
 
  QString a0( a ), b0( b );
  a0.replace( re, QStringLiteral( "#" ) );
  b0.replace( re, QStringLiteral( "#" ) );
 
  QgsDebugMsg( QStringLiteral( "a0:%1 b0:%2" ).arg( a0, b0 ) );
 
  if ( a0 != b0 )
    return false;
 
  QList<double> al, bl;
 
  int pos;
  for ( pos = 0; ( pos = re.indexIn( a, pos ) ) != -1; pos += re.matchedLength() )
  {
    al << re.cap( 0 ).toDouble();
  }
  for ( pos = 0; ( pos = re.indexIn( b, pos ) ) != -1; pos += re.matchedLength() )
  {
    bl << re.cap( 0 ).toDouble();
  }
 
  if ( al.size() != bl.size() )
    return false;
 
  for ( int i = 0; i < al.size(); i++ )
  {
    if ( !qgsDoubleNear( al[i], bl[i], tolerance ) )
      return false;
  }
 
  return true;
}
 
#endif