本文整理汇总了C++中GP::close_chunk方法的典型用法代码示例。如果您正苦于以下问题：C++ GP::close_chunk方法的具体用法？C++ GP::close_chunk怎么用？C++ GP::close_chunk使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类GP的用法示例。

在下文中一共展示了GP::close_chunk方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: ReadAnnotations

void DjVuSource::ReadAnnotations(GP<ByteStream> pInclStream,
		set<GUTF8String>& processed, GP<ByteStream> pAnnoStream)
{
	// Look for shared annotations
	GUTF8String strInclude;
	char buf[1024];
	int nLength;
	while ((nLength = pInclStream->read(buf, 1024)))
		strInclude += GUTF8String(buf, nLength);

	// Eat '\n' in the beginning and at the end
	while (strInclude.length() > 0 && strInclude[0] == '\n')
		strInclude = strInclude.substr(1, static_cast<unsigned int>(-1));

	while (strInclude.length() > 0 && strInclude[static_cast<int>(strInclude.length()) - 1] == '\n')
		strInclude.setat(strInclude.length() - 1, 0);

	if (strInclude.length() > 0 && processed.find(strInclude) == processed.end())
	{
		processed.insert(strInclude);

		GURL urlInclude = m_pDjVuDoc->id_to_url(strInclude);
		GP<DataPool> pool = m_pDjVuDoc->request_data(NULL, urlInclude);
		GP<ByteStream> stream = pool->get_stream();
		GP<IFFByteStream> iff(IFFByteStream::create(stream));

		// Check file format
		GUTF8String chkid;
		if (!iff->get_chunk(chkid) ||
			(chkid != "FORM:DJVI" && chkid != "FORM:DJVU" &&
			chkid != "FORM:PM44" && chkid != "FORM:BM44"))
		{
			return;
		}

		// Find chunk with page info
		while (iff->get_chunk(chkid) != 0)
		{
			GP<ByteStream> chunk_stream = iff->get_bytestream();

			if (chkid == "INCL")
			{
				ReadAnnotations(pInclStream, processed, pAnnoStream);
			}
			else if (chkid == "FORM:ANNO")
			{
				pAnnoStream->copy(*chunk_stream);
			}
			else if (chkid == "ANTa" || chkid == "ANTz")
			{
				const GP<IFFByteStream> iffout = IFFByteStream::create(pAnnoStream);
				iffout->put_chunk(chkid);
				iffout->copy(*chunk_stream);
				iffout->close_chunk();
			}

			iff->seek_close_chunk();
		}
	}
}

示例2: url

void 
create_bg44_chunk(IFFByteStream &iff, const char *ckid, GUTF8String filespec)
{
  static GP<IFFByteStream> bg44iff;
  if (! bg44iff)
    {
      if (flag_contains_bg)
        DjVuPrintErrorUTF8("%s","djvumake: Duplicate BGxx chunk\n");
      int i=filespec.rsearch(':');
      for (int j=i+1; i>0 && j<(int)filespec.length(); j++)
        if (filespec[j] < '0' || filespec[j] > '9')
          i = -1;
      if (!i)
        G_THROW("djvumake: no filename specified in first BG44 specification");
      GUTF8String filename=(i<0)?filespec:GUTF8String(filespec, i);
      const GURL::Filename::UTF8 url(filename);
      const GP<ByteStream> gbs(ByteStream::create(url,"rb"));
      if(!gbs)
      {
        G_THROW("djvumake: no such file as"+filename);
      }
      bg44iff = IFFByteStream::create(gbs);
      GUTF8String chkid;
      bg44iff->get_chunk(chkid);
      if (chkid != "FORM:PM44" && chkid != "FORM:BM44")
        G_THROW("djvumake: BG44 file has incorrect format (wrong IFF header)");        
      if (i>=0)
        filespec = i+1+(const char *)filespec;
      else 
        filespec = "99";
    }
  else
    {
      if (filespec.length() && filespec[0]!=':')
        G_THROW("djvumake: filename specified in BG44 refinement");
      filespec = 1+(const char *)filespec;
    }
  const char *s=filespec;
  int nchunks = strtol((char *)s, (char **)&s, 10);
  if (nchunks<1 || nchunks>99)
    G_THROW("djvumake: invalid number of chunks in BG44 specification");    
  if (*s)
    G_THROW("djvumake: invalid BG44 specification (syntax error)");
  
  int flag = (nchunks>=99);
  GUTF8String chkid;
  while (nchunks-->0 && bg44iff->get_chunk(chkid))
    {
      if (chkid!="PM44" && chkid!="BM44")
        {
          DjVuPrintErrorUTF8("%s","djvumake: BG44 file contains unrecognized chunks (fixed)\n");
          nchunks += 1;
          bg44iff->close_chunk();
          continue;
        }
      GP<ByteStream> gmbs=ByteStream::create();
      ByteStream &mbs=*gmbs;
      mbs.copy(*(bg44iff->get_bytestream()));
      bg44iff->close_chunk();  
      mbs.seek(0);
      if (mbs.readall((void*)&primary, sizeof(primary)) != sizeof(primary))
        G_THROW("djvumake: BG44 file is corrupted (cannot read primary header)\n");    
      if (primary.serial == 0)
        {
          if (mbs.readall((void*)&secondary, sizeof(secondary)) != sizeof(secondary))
            G_THROW("djvumake: BG44 file is corrupted (cannot read secondary header)\n");    
          int iw = (secondary.xhi<<8) + secondary.xlo;
          int ih = (secondary.yhi<<8) + secondary.ylo;
          int red;
          for (red=1; red<=12; red++)
            if (iw==(w+red-1)/red && ih==(h+red-1)/red)
              break;
          flag_contains_bg = red;
          if (red>12)
            DjVuPrintErrorUTF8("%s","djvumake: BG44 subsampling is not in [1..12] range\n");
        }
      mbs.seek(0);
      iff.put_chunk(ckid);
      iff.copy(mbs);
      iff.close_chunk();
      flag = 1;
    }
  if (!flag)
    DjVuPrintErrorUTF8("%s","djvumake: no more chunks in BG44 file\n");
}

示例3: ReadPageInfo

PageInfo DjVuSource::ReadPageInfo(int nPage, bool bNeedText, bool bNeedAnno)
{
	ASSERT(nPage >= 0 && nPage < m_nPageCount);
	PageInfo pageInfo;
	pageInfo.szPage.cx = 100;
	pageInfo.szPage.cy = 100;
	pageInfo.nDPI = 100;
	pageInfo.bDecoded = true;

	GP<ByteStream> pAnnoStream;
	if (bNeedAnno)
		pAnnoStream = ByteStream::create();

	GP<ByteStream> pTextStream;
	if (bNeedText)
		pTextStream = ByteStream::create();

	try
	{
		// Get raw data from the document and decode only requested chunks
		// DjVuFile is not used to ensure that we do not wait for a lock
		// to be released and thus do not block the UI thread
		GURL url = m_pDjVuDoc->page_to_url(nPage);
		GP<DataPool> pool = m_pDjVuDoc->request_data(NULL, url);
		GP<ByteStream> stream = pool->get_stream();
		GP<IFFByteStream> iff(IFFByteStream::create(stream));

		// Check file format
		GUTF8String chkid;
		if (!iff->get_chunk(chkid) ||
			(chkid != "FORM:DJVI" && chkid != "FORM:DJVU" &&
			 chkid != "FORM:PM44" && chkid != "FORM:BM44"))
		{
			return pageInfo;
		}

		bool bHasIW44 = false;

		// Find chunk with page info
		while (iff->get_chunk(chkid) != 0)
		{
			GP<ByteStream> chunk_stream = iff->get_bytestream();

			if (chkid == "INFO")
			{
				// Get page dimensions and resolution from info chunk
				GP<DjVuInfo> pInfo = DjVuInfo::create();
				pInfo->decode(*chunk_stream);

				// Check data for consistency
				pageInfo.szPage.cx = max(pInfo->width, 0);
				pageInfo.szPage.cy = max(pInfo->height, 0);
				pageInfo.nInitialRotate = pInfo->orientation;
				pageInfo.nDPI = max(pInfo->dpi, 0);

				if ((pInfo->orientation & 1) != 0)
					swap(pageInfo.szPage.cx, pageInfo.szPage.cy);
			}
			else if (!bHasIW44 && (chkid == "PM44" || chkid == "BM44"))
			{
				bHasIW44 = true;

				// Get image dimensions and resolution from bitmap chunk
				UINT serial = chunk_stream->read8();
				UINT slices = chunk_stream->read8();
				UINT major = chunk_stream->read8();
				UINT minor = chunk_stream->read8();

				UINT xhi = chunk_stream->read8();
				UINT xlo = chunk_stream->read8();
				UINT yhi = chunk_stream->read8();
				UINT ylo = chunk_stream->read8();

				pageInfo.szPage.cx = (xhi << 8) | xlo;
				pageInfo.szPage.cy = (yhi << 8) | ylo;
				pageInfo.nDPI = 100;
			}
			else if (chkid == "TXTa" || chkid == "TXTz")
			{
				pageInfo.bHasText = true;

				if (bNeedText)
				{
					const GP<IFFByteStream> iffout = IFFByteStream::create(pTextStream);
					iffout->put_chunk(chkid);
					iffout->copy(*chunk_stream);
					iffout->close_chunk();
				}
			}
			else if (bNeedAnno && chkid == "FORM:ANNO")
			{
				pAnnoStream->copy(*chunk_stream);
			}
			else if (bNeedAnno && (chkid == "ANTa" || chkid == "ANTz"))
			{
				const GP<IFFByteStream> iffout = IFFByteStream::create(pAnnoStream);
				iffout->put_chunk(chkid);
				iffout->copy(*chunk_stream);
				iffout->close_chunk();
			}
//.........这里部分代码省略.........

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