示例#1
0
    void PgfImage::readMetadata()
    {
#ifdef DEBUG
        std::cerr << "Exiv2::PgfImage::readMetadata: Reading PGF file " << io_->path() << "\n";
#endif
        if (io_->open() != 0)
        {
            throw Error(9, io_->path(), strError());
        }
        IoCloser closer(*io_);
        // Ensure that this is the correct image type
        if (!isPgfType(*io_, true))
        {
            if (io_->error() || io_->eof()) throw Error(14);
            throw Error(3, "PGF");
        }
        clearMetadata();

        readPgfMagicNumber(*io_);

        uint32_t headerSize = readPgfHeaderSize(*io_);

        readPgfHeaderStructure(*io_, &pixelWidth_, &pixelHeight_);

        // And now, the most interresting, the user data byte array where metadata are stored as small image.

        long size = 8 + headerSize - io_->tell();

#ifdef DEBUG
        std::cout << "Exiv2::PgfImage::readMetadata: Found Image data (" << size << " bytes)\n";
#endif

        if (size < 0) throw Error(20);
        if (size == 0) return;

        DataBuf imgData(size);
        std::memset(imgData.pData_, 0x0, imgData.size_);
        long bufRead = io_->read(imgData.pData_, imgData.size_);
        if (io_->error()) throw Error(14);
        if (bufRead != imgData.size_) throw Error(20);

        Image::AutoPtr image = Exiv2::ImageFactory::open(imgData.pData_, imgData.size_);
        image->readMetadata();
        exifData() = image->exifData();
        iptcData() = image->iptcData();
        xmpData()  = image->xmpData();

    } // PgfImage::readMetadata
示例#2
0
    void PgfImage::doWriteMetadata(BasicIo& outIo)
    {
        if (!io_->isopen()) throw Error(20);
        if (!outIo.isopen()) throw Error(21);

#ifdef DEBUG
        std::cout << "Exiv2::PgfImage::doWriteMetadata: Writing PGF file " << io_->path() << "\n";
        std::cout << "Exiv2::PgfImage::doWriteMetadata: tmp file created " << outIo.path() << "\n";
#endif

        // Ensure that this is the correct image type
        if (!isPgfType(*io_, true))
        {
            if (io_->error() || io_->eof()) throw Error(20);
            throw Error(22);
        }

        // Ensure PGF version.
        byte mnb            = readPgfMagicNumber(*io_);

        readPgfHeaderSize(*io_);

        int w, h;
        DataBuf header      = readPgfHeaderStructure(*io_, w, h);

        Image::AutoPtr img  = ImageFactory::create(ImageType::png);

        img->setExifData(exifData_);
        img->setIptcData(iptcData_);
        img->setXmpData(xmpData_);
        img->writeMetadata();
        int     imgSize  = img->io().size();
        DataBuf imgBuf   = img->io().read(imgSize);

#ifdef DEBUG
        std::cout << "Exiv2::PgfImage::doWriteMetadata: Creating image to host metadata (" << imgSize << " bytes)\n";
#endif

        //---------------------------------------------------------------

        // Write PGF Signature.
        if (outIo.write(pgfSignature, 3) != 3) throw Error(21);

        // Write Magic number.
        if (outIo.putb(mnb) == EOF) throw Error(21);

        // Write new Header size.
        uint32_t newHeaderSize = header.size_ + imgSize;
        DataBuf buffer(4);
        memcpy (buffer.pData_, &newHeaderSize, 4);
        byteSwap_(buffer,0,bSwap_);
        if (outIo.write(buffer.pData_, 4) != 4) throw Error(21);

#ifdef DEBUG
        std::cout << "Exiv2::PgfImage: new PGF header size : " << newHeaderSize << " bytes\n";

        printf("%x\n", buffer.pData_[0]);
        printf("%x\n", buffer.pData_[1]);
        printf("%x\n", buffer.pData_[2]);
        printf("%x\n", buffer.pData_[3]);
#endif

        // Write Header data.
        if (outIo.write(header.pData_, header.size_) != header.size_) throw Error(21);

        // Write new metadata byte array.
        if (outIo.write(imgBuf.pData_, imgBuf.size_) != imgBuf.size_) throw Error(21);

        // Copy the rest of PGF image data.

        DataBuf buf(4096);
        long readSize = 0;
        while ((readSize=io_->read(buf.pData_, buf.size_)))
        {
            if (outIo.write(buf.pData_, readSize) != readSize) throw Error(21);
        }
        if (outIo.error()) throw Error(21);

    } // PgfImage::doWriteMetadata