#134 DPI in PdfImage

[Igor Mironchik]

It would be great if you add a DPI setting into PdfImage, like:

inline void SetDpi( pdf_uint16 dpi );

with private member in PdfImage

pdf_uint16 m_dpi;

and

void PdfImage::SetImageData( unsigned int nWidth, unsigned int nHeight, 
                             unsigned int nBitsPerComponent, PdfInputStream* pStream, 
                             const TVecFilters & vecFilters )
{
    const unsigned int w = std::round( (double) nWidth / (double) m_dpi * 72.0 );
    const unsigned int h = std::round( (double) nHeight / (double) m_dpi * 72.0 );

    m_rRect.SetWidth( w );
    m_rRect.SetHeight( h );

    this->GetObject()->GetDictionary().AddKey( "Width",  PdfVariant( static_cast<pdf_int64>(nWidth) ) );
    this->GetObject()->GetDictionary().AddKey( "Height", PdfVariant( static_cast<pdf_int64>(nHeight) ) );
    this->GetObject()->GetDictionary().AddKey( "BitsPerComponent", PdfVariant( static_cast<pdf_int64>(nBitsPerComponent) ) );

    PdfVariant var;
    m_rRect.ToVariant( var );
    this->GetObject()->GetDictionary().AddKey( "BBox", var );

    this->GetObject()->GetStream()->Set( pStream, vecFilters );
}

void PdfImage::SetImageDataRaw( unsigned int nWidth, unsigned int nHeight, 
                                unsigned int nBitsPerComponent, PdfInputStream* pStream )
{
    const unsigned int w = std::round( (double) nWidth / (double) m_dpi * 72.0 );
    const unsigned int h = std::round( (double) nHeight / (double) m_dpi * 72.0 );

    m_rRect.SetWidth( w );
    m_rRect.SetHeight( h );

    this->GetObject()->GetDictionary().AddKey( "Width",  PdfVariant( static_cast<pdf_int64>(nWidth) ) );
    this->GetObject()->GetDictionary().AddKey( "Height", PdfVariant( static_cast<pdf_int64>(nHeight) ) );
    this->GetObject()->GetDictionary().AddKey( "BitsPerComponent", PdfVariant( static_cast<pdf_int64>(nBitsPerComponent) ) );

    PdfVariant var;
    m_rRect.ToVariant( var );
    this->GetObject()->GetDictionary().AddKey( "BBox", var );

    this->GetObject()->GetStream()->SetRawData( pStream, -1 );
}

With these changes images in my PDFs look perfect, I set DPI to 150 and PDFs look amazing...