QgsRasterBlock* QgsSingleBandColorDataRenderer::block( int bandNo, QgsRectangle  const & extent, int width, int height, QgsRasterBlockFeedback* feedback )
{
  Q_UNUSED( bandNo );

  QgsRasterBlock *outputBlock = new QgsRasterBlock();
  if ( !mInput )
  {
    return outputBlock;
  }

  QgsRasterBlock *inputBlock = mInput->block( mBand, extent, width, height, feedback );
  if ( !inputBlock || inputBlock->isEmpty() )
  {
    QgsDebugMsg( "No raster data!" );
    delete inputBlock;
    return outputBlock;
  }

  bool hasTransparency = usesTransparency();
  if ( !hasTransparency )
  {
    // Nothing to do, just retype if necessary
    inputBlock->convert( Qgis::ARGB32_Premultiplied );
    delete outputBlock;
    return inputBlock;
  }

  if ( !outputBlock->reset( Qgis::ARGB32_Premultiplied, width, height ) )
  {
    delete inputBlock;
    return outputBlock;
  }

  // make sure input is also premultiplied!
  inputBlock->convert( Qgis::ARGB32_Premultiplied );

  QRgb* inputBits = ( QRgb* )inputBlock->bits();
  QRgb* outputBits = ( QRgb* )outputBlock->bits();
  for ( qgssize i = 0; i < ( qgssize )width*height; i++ )
  {
    QRgb c = inputBits[i];
    outputBits[i] = qRgba( mOpacity * qRed( c ), mOpacity * qGreen( c ), mOpacity * qBlue( c ), mOpacity * qAlpha( c ) );
  }

  delete inputBlock;
  return outputBlock;
}
QgsRasterBlock* QgsSingleBandColorDataRenderer::block( int bandNo, QgsRectangle  const & extent, int width, int height )
{
  Q_UNUSED( bandNo );

  QgsRasterBlock *outputBlock = new QgsRasterBlock();
  if ( !mInput )
  {
    return outputBlock;
  }

  QgsRasterBlock *inputBlock = mInput->block( mBand, extent, width, height );
  if ( !inputBlock || inputBlock->isEmpty() )
  {
    QgsDebugMsg( "No raster data!" );
    delete inputBlock;
    return outputBlock;
  }

  bool hasTransparency = usesTransparency();
  if ( !hasTransparency )
  {
    // Nothing to do, just retype if necessary
    inputBlock->convert( QgsRasterBlock::ARGB32_Premultiplied );
    delete outputBlock;
    return inputBlock;
  }

  if ( !outputBlock->reset( QgsRasterBlock::ARGB32_Premultiplied, width, height ) )
  {
    delete inputBlock;
    return outputBlock;
  }

  for ( size_t i = 0; i < ( size_t )width*height; i++ )
  {
    QRgb pixelColor;
    double alpha = 255.0;
    QRgb c = inputBlock->color( i );
    alpha = qAlpha( c );
    pixelColor = qRgba( mOpacity * qRed( c ), mOpacity * qGreen( c ), mOpacity * qBlue( c ), mOpacity * alpha );
    outputBlock->setColor( i,  pixelColor );
  }

  delete inputBlock;
  return outputBlock;
}
예제 #3
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static QByteArray _readDtmData( QgsRasterDataProvider *provider, const QgsRectangle &extent, int res )
{
  QElapsedTimer t;
  t.start();

  // TODO: use feedback object? (but GDAL currently does not support cancelation anyway)
  QgsRasterBlock *block = provider->block( 1, extent, res, res );

  QByteArray data;
  if ( block )
  {
    block->convert( Qgis::Float32 ); // currently we expect just floats
    data = block->data();
    data.detach();  // this should make a deep copy
    delete block;
  }
  return data;
}
예제 #4
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float QgsDemHeightMapGenerator::heightAt( double x, double y )
{
  // TODO: this is quite a primitive implementation: better to use heightmaps currently in use
  int res = 1024;
  QgsRectangle rect = mDtm->extent();
  if ( mDtmCoarseData.isEmpty() )
  {
    QgsRasterBlock *block = mDtm->dataProvider()->block( 1, rect, res, res );
    block->convert( Qgis::Float32 );
    mDtmCoarseData = block->data();
    mDtmCoarseData.detach();  // make a deep copy
    delete block;
  }

  int cellX = ( int )( ( x - rect.xMinimum() ) / rect.width() * res + .5f );
  int cellY = ( int )( ( rect.yMaximum() - y ) / rect.height() * res + .5f );
  cellX = qBound( 0, cellX, res - 1 );
  cellY = qBound( 0, cellY, res - 1 );

  const float *data = ( const float * ) mDtmCoarseData.constData();
  return data[cellX + cellY * res];
}
예제 #5
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QByteArray QgsDemHeightMapGenerator::renderSynchronously( int x, int y, int z )
{
  // extend the rect by half-pixel on each side? to get the values in "corners"
  QgsRectangle extent = mTilingScheme.tileToExtent( x, y, z );
  float mapUnitsPerPixel = extent.width() / mResolution;
  extent.grow( mapUnitsPerPixel / 2 );
  // but make sure not to go beyond the full extent (returns invalid values)
  QgsRectangle fullExtent = mTilingScheme.tileToExtent( 0, 0, 0 );
  extent = extent.intersect( &fullExtent );

  QgsRasterBlock *block = mDtm->dataProvider()->block( 1, extent, mResolution, mResolution );

  QByteArray data;
  if ( block )
  {
    block->convert( Qgis::Float32 ); // currently we expect just floats
    data = block->data();
    data.detach();  // this should make a deep copy
    delete block;
  }

  return data;
}
예제 #6
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int QgsGrassGisLib::readRasterRow( int fd, void * buf, int row, RASTER_MAP_TYPE data_type, bool noDataAsZero )
{
    if ( row < 0 || row >= mRows )
    {
        QgsDebugMsg( QString( "row %1 out of range 0 - %2" ).arg( row ).arg( mRows ) );
        return 0;
    }

    // TODO: use cached block with more rows
    Raster raster = mRasters.value( fd );
    //if ( !raster.provider ) return -1;
    if ( !raster.input ) return -1;

    // Create extent for current row
    QgsRectangle blockRect = mExtent;
    double yRes = mExtent.height() / mRows;
    double yMax = mExtent.yMaximum() - yRes * row;
    //QgsDebugMsg( QString( "height = %1 mRows = %2" ).arg( mExtent.height() ).arg( mRows ) );
    //QgsDebugMsg( QString( "row = %1 yRes = %2 yRes * row = %3" ).arg( row ).arg( yRes ).arg( yRes * row ) );
    //QgsDebugMsg( QString( "mExtent.yMaximum() = %1 yMax = %2" ).arg( mExtent.yMaximum() ).arg( yMax ) );
    blockRect.setYMaximum( yMax );
    blockRect.setYMinimum( yMax - yRes );

    QgsRasterBlock *block = raster.input->block( raster.band, blockRect, mColumns, 1 );
    if ( !block ) return -1;

    QGis::DataType requestedType = qgisRasterType( data_type );

    //QgsDebugMsg( QString("data_type = %1").arg(data_type) );
    //QgsDebugMsg( QString("requestedType = %1").arg(requestedType) );
    //QgsDebugMsg( QString("requestedType size = %1").arg( QgsRasterBlock::typeSize( requestedType ) ) );
    //QgsDebugMsg( QString("block->dataType = %1").arg( block->dataType() ) );

    block->convert( requestedType );

    memcpy( buf, block->bits( 0 ), QgsRasterBlock::typeSize( requestedType ) * mColumns );

    for ( int i = 0; i < mColumns; i++ )
    {
        QgsDebugMsgLevel( QString( "row = %1 i = %2 val = %3 isNoData = %4" ).arg( row ).arg( i ).arg( block->value( i ) ).arg( block->isNoData( i ) ), 5 );
        //(( CELL * ) buf )[i] = i;
        if ( block->isNoData( 0, i ) )
        {
            if ( noDataAsZero )
            {
                switch ( data_type )
                {
                case CELL_TYPE:
                    G_zero(( char * ) &(( CELL * ) buf )[i], G_raster_size( data_type ) );
                    break;
                case FCELL_TYPE:
                    G_zero(( char * ) &(( FCELL * ) buf )[i], G_raster_size( data_type ) );
                    break;
                case DCELL_TYPE:
                    G_zero(( char * ) &(( DCELL * ) buf )[i], G_raster_size( data_type ) );
                    break;
                default:
                    break;
                }
            }
            else
            {
                switch ( data_type )
                {
                case CELL_TYPE:
                    G_set_c_null_value( &(( CELL * ) buf )[i], 1 );
                    break;
                case FCELL_TYPE:
                    G_set_f_null_value( &(( FCELL * ) buf )[i], 1 );
                    break;
                case DCELL_TYPE:
                    G_set_d_null_value( &(( DCELL * ) buf )[i], 1 );
                    break;
                default:
                    break;
                }
            }
        }
        //else
        //{
        //memcpy( &( buf[i] ), block->bits( 0, i ), 4 );
        //buf[i] = (int)  block->value( 0, i);
        //QgsDebugMsg( QString("buf[i] = %1").arg(buf[i]));
        //}
    }
    delete block;
    return 1;

}
예제 #7
0
bool QgsGrassRasterImport::import()
{
  QgsDebugMsg( "entered" );
  if ( !mPipe )
  {
    setError( "Pipe is null." );
    return false;
  }

  QgsRasterDataProvider * provider = mPipe->provider();
  if ( !provider )
  {
    setError( "Pipe has no provider." );
    return false;
  }

  if ( !provider->isValid() )
  {
    setError( "Provider is not valid." );
    return false;
  }

  int redBand = 0;
  int greenBand = 0;
  int blueBand = 0;
  for ( int band = 1; band <= provider->bandCount(); band++ )
  {
    QgsDebugMsg( QString( "band = %1" ).arg( band ) );
    int colorInterpretation = provider->colorInterpretation( band );
    if ( colorInterpretation ==  QgsRaster::RedBand )
    {
      redBand = band;
    }
    else if ( colorInterpretation ==  QgsRaster::GreenBand )
    {
      greenBand = band;
    }
    else if ( colorInterpretation ==  QgsRaster::BlueBand )
    {
      blueBand = band;
    }

    QGis::DataType qgis_out_type = QGis::UnknownDataType;
    RASTER_MAP_TYPE data_type = -1;
    switch ( provider->dataType( band ) )
    {
      case QGis::Byte:
      case QGis::UInt16:
      case QGis::Int16:
      case QGis::UInt32:
      case QGis::Int32:
        qgis_out_type = QGis::Int32;
        break;
      case QGis::Float32:
        qgis_out_type = QGis::Float32;
        break;
      case QGis::Float64:
        qgis_out_type = QGis::Float64;
        break;
      case QGis::ARGB32:
      case QGis::ARGB32_Premultiplied:
        qgis_out_type = QGis::Int32;  // split to multiple bands?
        break;
      case QGis::CInt16:
      case QGis::CInt32:
      case QGis::CFloat32:
      case QGis::CFloat64:
      case QGis::UnknownDataType:
        setError( tr( "Data type %1 not supported" ).arg( provider->dataType( band ) ) );
        return false;
    }

    QgsDebugMsg( QString( "data_type = %1" ).arg( data_type ) );

    QString module = QgsGrass::qgisGrassModulePath() + "/qgis.r.in";
    QStringList arguments;
    QString name = mGrassObject.name();
    if ( provider->bandCount() > 1 )
    {
      // raster.<band> to keep in sync with r.in.gdal
      name += QString( ".%1" ).arg( band );
    }
    arguments.append( "output=" + name );    // get list of all output names
    QTemporaryFile gisrcFile;
    QProcess* process = 0;
    try
    {
      process = QgsGrass::startModule( mGrassObject.gisdbase(), mGrassObject.location(), mGrassObject.mapset(), module, arguments, gisrcFile );
    }
    catch ( QgsGrass::Exception &e )
    {
      setError( e.what() );
      return false;
    }

    QDataStream outStream( process );

    outStream << mExtent << ( qint32 )mXSize << ( qint32 )mYSize;
    outStream << ( qint32 )qgis_out_type;

    // calculate reasonable block size (5MB)
    int maximumTileHeight = 5000000 / mXSize;
    maximumTileHeight = std::max( 1, maximumTileHeight );
    // smaller if reprojecting so that it can be canceled quickly
    if ( mPipe->projector() )
    {
      maximumTileHeight = std::max( 1, 100000 / mXSize );
    }

    QgsRasterIterator iter( mPipe->last() );
    iter.setMaximumTileWidth( mXSize );
    iter.setMaximumTileHeight( maximumTileHeight );

    iter.startRasterRead( band, mXSize, mYSize, mExtent );

    int iterLeft = 0;
    int iterTop = 0;
    int iterCols = 0;
    int iterRows = 0;
    QgsRasterBlock* block = 0;
    process->setReadChannel( QProcess::StandardOutput );
    while ( iter.readNextRasterPart( band, iterCols, iterRows, &block, iterLeft, iterTop ) )
    {
      for ( int row = 0; row < iterRows; row++ )
      {
        if ( !block->convert( qgis_out_type ) )
        {
          setError( tr( "Cannot convert block (%1) to data type %2" ).arg( block->toString() ).arg( qgis_out_type ) );
          delete block;
          return false;
        }
        // prepare null values
        double noDataValue;
        if ( block->hasNoDataValue() )
        {
          noDataValue = block->noDataValue();
        }
        else
        {
          switch ( qgis_out_type )
          {
            case QGis::Int32:
              noDataValue = -2147483648.0;
              break;
            case QGis::Float32:
              noDataValue = std::numeric_limits<float>::max() * -1.0;
              break;
            case QGis::Float64:
              noDataValue = std::numeric_limits<double>::max() * -1.0;
              break;
            default: // should not happen
              noDataValue = std::numeric_limits<double>::max() * -1.0;
          }
          for ( qgssize i = 0; i < ( qgssize )block->width()*block->height(); i++ )
          {
            if ( block->isNoData( i ) )
            {
              block->setValue( i, noDataValue );
            }
          }
        }

        char * data = block->bits( row, 0 );
        int size = iterCols * block->dataTypeSize();
        QByteArray byteArray = QByteArray::fromRawData( data, size ); // does not copy data and does not take ownership
        if ( isCanceled() )
        {
          outStream << true; // cancel module
          break;
        }
        outStream << false; // not canceled
        outStream << noDataValue;

        outStream << byteArray;

        // Without waitForBytesWritten() it does not finish ok on Windows (process timeout)
        process->waitForBytesWritten( -1 );

#ifndef Q_OS_WIN
        // wait until the row is written to allow quick cancel (don't send data to buffer)
        process->waitForReadyRead();
        bool result;
        outStream >> result;
#endif
      }
      delete block;
      if ( isCanceled() )
      {
        outStream << true; // cancel module
        break;
      }
    }

    // TODO: send something back from module and read it here to close map correctly in module

    process->closeWriteChannel();
    // TODO: best timeout?
    process->waitForFinished( 30000 );

    QString stdoutString = process->readAllStandardOutput().data();
    QString stderrString = process->readAllStandardError().data();

    QString processResult = QString( "exitStatus=%1, exitCode=%2, error=%3, errorString=%4 stdout=%5, stderr=%6" )
                            .arg( process->exitStatus() ).arg( process->exitCode() )
                            .arg( process->error() ).arg( process->errorString() )
                            .arg( stdoutString.replace( "\n", ", " ) ).arg( stderrString.replace( "\n", ", " ) );
    QgsDebugMsg( "processResult: " + processResult );

    if ( process->exitStatus() != QProcess::NormalExit )
    {
      setError( process->errorString() );
      delete process;
      return false;
    }

    if ( process->exitCode() != 0 )
    {
      setError( stderrString );
      delete process;
      return false;
    }

    delete process;
  }
  QgsDebugMsg( QString( "redBand = %1 greenBand = %2 blueBand = %3" ).arg( redBand ).arg( greenBand ).arg( blueBand ) );
  if ( redBand > 0 && greenBand > 0 && blueBand > 0 )
  {
    // TODO: check if the group exists
    // I_find_group()
    QString name = mGrassObject.name();

    G_TRY
    {
      QgsGrass::setMapset( mGrassObject.gisdbase(), mGrassObject.location(), mGrassObject.mapset() );
      struct Ref ref;
      I_get_group_ref( name.toUtf8().data(), &ref );
      QString redName = name + QString( ".%1" ).arg( redBand );
      QString greenName = name + QString( ".%1" ).arg( greenBand );
      QString blueName = name + QString( ".%1" ).arg( blueBand );
      I_add_file_to_group_ref( redName.toUtf8().data(), mGrassObject.mapset().toUtf8().data(), &ref );
      I_add_file_to_group_ref( greenName.toUtf8().data(), mGrassObject.mapset().toUtf8().data(), &ref );
      I_add_file_to_group_ref( blueName.toUtf8().data(), mGrassObject.mapset().toUtf8().data(), &ref );
      I_put_group_ref( name.toUtf8().data(), &ref );
    }
    G_CATCH( QgsGrass::Exception &e )
    {
      QgsDebugMsg( QString( "Cannot create group: %1" ).arg( e.what() ) );
    }