C++ Blob::length方法代码示例

// [[Rcpp::export]]
Rcpp::RawVector magick_image_write( XPtrImage input, Rcpp::CharacterVector format, Rcpp::IntegerVector quality,
                                    Rcpp::IntegerVector depth, Rcpp::CharacterVector density, Rcpp::CharacterVector comment){
  if(!input->size())
    return Rcpp::RawVector(0);
  XPtrImage image = copy(input);
#if MagickLibVersion >= 0x691
  //suppress write warnings see #74 and #116
  image->front().quiet(true);
#endif
  if(format.size())
    for_each ( image->begin(), image->end(), Magick::magickImage(std::string(format[0])));
  if(quality.size())
    for_each ( image->begin(), image->end(), Magick::qualityImage(quality[0]));
  if(depth.size())
    for_each ( image->begin(), image->end(), Magick::depthImage(depth[0]));
  if(density.size()){
    for_each ( image->begin(), image->end(), Magick::resolutionUnitsImage(Magick::PixelsPerInchResolution));
    for_each ( image->begin(), image->end(), Magick::densityImage(Point(density[0])));
  }
  if(comment.size())
    for_each ( image->begin(), image->end(), Magick::commentImage(std::string(comment.at(0))));
  Magick::Blob output;
  writeImages( image->begin(), image->end(),  &output );
  Rcpp::RawVector res(output.length());
  std::memcpy(res.begin(), output.data(), output.length());
  return res;
}

// [[Rcpp::export]]
Rcpp::IntegerVector magick_image_write_integer(XPtrImage input){
  if(input->size() != 1)
    throw std::runtime_error("Image must have single frame to write a native raster");
  Frame frame = input->front();
  Magick::Geometry size(frame.size());
  size_t width = size.width();
  size_t height = size.height();
  Magick::Blob output;
  frame.write(&output, "RGBA", 8L);
  Rcpp::IntegerVector res(output.length() / 4);
  memcpy(res.begin(), output.data(), output.length());
  res.attr("class") = Rcpp::CharacterVector::create("nativeRaster");
  res.attr("dim") = Rcpp::NumericVector::create(height, width);
  return res;
}

//----------------------------------------------------------------------------------------------------------------------
// Image Magick Image loading routines
//----------------------------------------------------------------------------------------------------------------------
bool Image::load( const std::string &_fname  ) noexcept
{
  #ifdef IMAGE_DEBUG_ON
  std::cerr<<"loading with ImageMagick"<<std::endl;
  #endif
  Magick::Image image;
  Magick::Blob blob;

  try
  {
    image.read(_fname);
    // need to flip image as OpenGL uses textures starting the other way round.
    image.flip();
    image.write(&blob, "RGBA");
  }
  catch (Magick::Error& Error)
  {
  std::cout << "Error loading texture '" << _fname << "': " << Error.what() << std::endl;
  return false;
  }
  m_width=image.columns();
  m_height=image.rows();
  m_channels=4;
  m_format=GL_RGBA;
  m_data.reset(new unsigned char[ m_width*m_height*m_channels]);
  // simple memcpy of the blob data to our internal data, not worrying about RGB/RGBA
  // here (as OpenGL doesn't really either).
  memcpy(m_data.get(),blob.data(),blob.length());
  return true;
}

char osra_cuneiform_ocr(Magick::Image &cuneiform_img, const string &char_filter)
{
  Magick::Blob blob;
  cuneiform_img.write(&blob, "DIB");
  size_t data_size = blob.length();
  char *dib = new char[data_size];
  memcpy(dib, blob.data(), data_size);

  char str[256];
  memset(str, 0, sizeof(str));

  if (!PUMA_XOpen(dib, NULL) || !PUMA_XFinalRecognition() || !PUMA_SaveToMemory(NULL, PUMA_TOTEXT, PUMA_CODE_ASCII, str, sizeof(str) - 1))
    {
      //if (verbose)
      //  cout << "Cuneiform recognition failed." << endl;

      PUMA_XClose();
      delete []dib;

      return UNKNOWN_CHAR;
    }

  PUMA_XClose();
  delete []dib;

  // As we have initialized the image with two identical samples, it is expected that they go in the string
  // one after another, or separated by space (e.g. "ZZ\n" or "Z Z\n").
  if (((str[0] == str[1] && isspace(str[2])) || (str[0] == str[2] && str[1] == ' ')) && isalnum(str[0])
      && (char_filter.empty() || char_filter.find(str[0], 0) != string::npos))
    return str[0];

  return UNKNOWN_CHAR;
}

void Targets::plotTarget (rts2db::Target *tar, XmlRpc::HttpParams *params, const char* &response_type, char* &response, size_t &response_length)
{
	response_type = "image/jpeg";

	AltPlot ap (params->getInteger ("w", 800), params->getInteger ("h", 600));
	Magick::Geometry size (params->getInteger ("w", 800), params->getInteger ("h", 600));

	double from = params->getDouble ("from", 0);
	double to = params->getDouble ("to", 0);

	if (from < 0 && to == 0)
	{
		// just fr specified - from
		to = time (NULL);
		from += to;
	}
	else if (from == 0 && to == 0)
	{
		// default - one day
		to = time (NULL);
		from = to - 86400;
	}

	Magick::Image mimage (size, "white");
	ap.getPlot (from, to, tar, &mimage);

	Magick::Blob blob;
	mimage.write (&blob, "jpeg");

	response_length = blob.length();
	response = new char[response_length];
	memcpy (response, blob.data(), response_length);
}

void Night::printAlt (int year, int month, int day, XmlRpc::HttpParams *params, const char* &response_type, char* &response, size_t &response_length)
{
	response_type = "image/jpeg";

	AltPlot ap (params->getInteger ("w", 800), params->getInteger ("h", 600));
	Magick::Geometry size (params->getInteger ("w", 800), params->getInteger ("h", 600));

	time_t from;
	int64_t duration;

	getNightDuration (year, month, day, from, duration);

	time_t end = from + duration;

	rts2db::ImageSetDate is = rts2db::ImageSetDate (from, end);
	is.load ();

	Magick::Image mimage (size, "white");
	ap.getPlot (from, end, &is, &mimage);

	Magick::Blob blob;
	mimage.write (&blob, "jpeg");

	response_length = blob.length();
	response = new char[response_length];
	memcpy (response, blob.data(), response_length);
}

  void PipelineStabDetect::onInput(InputImageInfo info, Magick::Image image) {
    try {
      if (!initialized) {
        init(image);
      }
      if (image.rows() != height || image.columns() != width) {
        throw runtime_error(QString("Not uniform image size! %").arg(info.file.fileName()).toStdString());
      }


      Magick::Blob blob;
      // set raw RGBS output format & convert it into a Blob  
      if (image.depth() > 8)
        *err << "Warning: we lost some information by converting to 8bit depth (now " << image.depth() << ")" << endl;
      image.depth(8);
      image.magick("RGB");
      image.write(&blob);

      LocalMotions localmotions;
      VSFrame frame;
      size_t dataLen = blob.length();

      Q_ASSERT(fi.planes == 1);
      Q_ASSERT(dataLen == image.baseColumns() * image.baseRows() * 3);

      if (stabConf->mdConf.show > 0) { // create copy of blob
        frame.data[0] = new uint8_t[dataLen];
        memcpy(frame.data[0], blob.data(), dataLen);
      } else {
        frame.data[0] = (uint8_t*) blob.data();
      }
      frame.linesize[0] = image.baseColumns() * 3;

      if (vsMotionDetection(&md, &localmotions, &frame) != VS_OK) {
        throw runtime_error("motion detection failed");
      } else {
        if (vsWriteToFile(&md, f, &localmotions) != VS_OK) {
          throw runtime_error("cannot write to transform file");
        }
        vs_vector_del(&localmotions);
      }

      if (stabConf->mdConf.show > 0) {
        // if we want to store transformations, we have to create new image...
        Magick::Geometry g(width, height);
        Magick::Blob oblob(frame.data[0], dataLen);

        Magick::Image oimage;
        oimage.read(oblob, g, 8, "RGB");
        delete[] frame.data[0];
        emit input(info, oimage);
      } else {
        emit input(info, image);
      }

    } catch (exception &e) {
      emit error(e.what());
    }
  }

// [[Rcpp::export]]
Rcpp::RawVector magick_image_write_frame(XPtrImage input, const char * format, size_t i = 1){
  if(input->size() < 1)
    throw std::runtime_error("Image must have at least 1 frame to write a bitmap");
  Frame frame = input->at(i-1); //zero indexing!
  Magick::Geometry size(frame.size());
  size_t width = size.width();
  size_t height = size.height();
  Magick::Blob output;
  frame.write(&output, format, 8L);
  if(output.length() == 0)
    throw std::runtime_error("Unsupported raw format: " + std::string(format));
  if(output.length() % (width * height))
    throw std::runtime_error("Dimensions do not add up, '" + std::string(format) + "' may not be a raw format");
  size_t slices = output.length() / (width * height);
  Rcpp::RawVector res(output.length());
  memcpy(res.begin(), output.data(), output.length());
  res.attr("class") = Rcpp::CharacterVector::create("bitmap", format);
  res.attr("dim") = Rcpp::NumericVector::create(slices, width, height);
  return res;
}

    void FsImgStorage::Write(ImgInfo& img) const {
        Utils::Contract::Assert(img.GetId() != IMGID_UNDEFINED);
        Utils::Contract::Assert(!img.GetFileExtension().empty());

        boost::filesystem::path uploadFilePath = GetImgPath(img.GetId(), img.GetFileExtension());

        Magick::Blob magickBlob;
        img.GetMagickImage().write(&magickBlob);

        Utils::FileSystem::WriteAllBytes((const char*)magickBlob.data(), magickBlob.length(), uploadFilePath);
    }

void Targets::processForm (XmlRpc::HttpParams *params, const char* &response_type, char* &response, size_t &response_length)
{
#ifdef RTS2_HAVE_LIBJPEG
	if (!strcmp (params->getString ("plot", "xxx"), "Plot target altitude"))
	{
		response_type = "image/jpeg";

		AltPlot ap (params->getInteger ("w", 800), params->getInteger ("h", 600));
		Magick::Geometry size (params->getInteger ("w", 800), params->getInteger ("h", 600));
	
		double from = params->getDouble ("from", 0);
		double to = params->getDouble ("to", 0);
	
		if (from < 0 && to == 0)
		{
			// just fr specified - from
			to = time (NULL);
			from += to;
		}
		else if (from == 0 && to == 0)
		{
			// default - one hour
			to = time (NULL);
			from = to - 86400;
		}


		std::list < int > ti;

		for (XmlRpc::HttpParams::iterator iter = params->begin (); iter != params->end (); iter++)
		{
			if (!strcmp (iter->getName (), "tid"))
				ti.push_back (atoi (iter->getValue ()));
		}

		rts2db::TargetSet ts = rts2db::TargetSet ();
		ts.load (ti);
	
		Magick::Image mimage (size, "white");
		ap.getPlot (from, to, &ts, &mimage);
	
		Magick::Blob blob;
		mimage.write (&blob, "jpeg");
	
		response_length = blob.length();
		response = new char[response_length];
		memcpy (response, blob.data(), response_length);
		return;
	}
#endif // RTS2_HAVE_LIBJPEG
}

void CMagicKHelper::GetPhotoBinval( const tstring& strPhotoName, tstring& strBinval )
{
	try
	{
		CLogger::GetInstance()->PrintErrLog("begin getphotoBinval");
		Magick::Image imgSrc(strPhotoName);
		CLogger::GetInstance()->PrintErrLog("imgSrc()");
		Magick::Blob blob;

//		EnterCriticalSection(cs_);
		imgSrc.write(&blob);
//		LeaveCriticalSection(cs_);

		CLogger::GetInstance()->PrintErrLog("write()");
		unsigned int len = blob.length();
		strBinval.assign((const char*)blob.data(), blob.length());
		CLogger::GetInstance()->PrintErrLog("write()");
	}
	catch (std::exception &ex)
	{
		CLogger::GetInstance()->PrintErrLog("resize image failure  %s", ex.what());
	}
}

ItemSequence_t
FormatFunction::evaluate(
  const ExternalFunction::Arguments_t& aArgs,
  const StaticContext*                          aSctxCtx,
  const DynamicContext*                         aDynCtx) const
{
  Magick::Image lImage;
  ImageFunction::getOneImageArg(aDynCtx, aArgs, 0, lImage);
  Magick::Blob lBlob;
  lImage.write(&lBlob); 
  long lBlobLength = (long) lBlob.length();
  std::string lImageType = GetImageType(lBlob.data(), &lBlobLength);
  String lResult(lImageType);
  return ItemSequence_t(new SingletonItemSequence(
      theModule->getItemFactory()->createString(lResult)));
}

 ResizeTest(std::string fileName) {
     source.loadFile(fileName);
     for (int i=1; i<99; ++i) {
         Magick::Image image = source.getImage();
         image.magick("JPEG");
         image.quality(50);
         Magick::Geometry resizeGeometry;
         resizeGeometry.percent(true);
         resizeGeometry.width(i);
         resizeGeometry.height(i);
         image.resize(resizeGeometry);
         Magick::Blob blob;
         image.write(&blob);
         imghash::Source target((char*)blob.data(), blob.length());
         images.push_back(target);
     }
 }

void photoalbum::api::map::map_tile_km(
        const jsonrpc::request& request,
        jsonrpc::result&        result,
        sqlite::connection&     conn
        )
{
    const std::string region = request.params().get<std::string>(0);
    const int eastings = request.params().get<int>(1);
    const int northings = request.params().get<int>(2);

    photoalbum::map::tile_data_db data_db;
    db::get(
            conn,
            region,
            eastings/10,
            northings/10,
            data_db
            );
    try
    {
        Magick::Image image(Magick::Blob(
            reinterpret_cast<const void*>(&(data_db.data[0])),
            data_db.data.size()
            )
            );
        Magick::Geometry out_size(
            image.size().width()/5,
            image.size().height()/5
            );
        Magick::Image out_image(out_size, Magick::Color(255,255,255));

        int off_x = -(out_size.width() * (eastings%5));
        int off_y = -(out_size.height() * (4 - (northings%5)));
        out_image.composite(image, off_x, off_y);

        Magick::Blob blob;
        out_image.write(&blob, "PNG");
        png_data(result.data()).data() = base64::encode(
            reinterpret_cast<const unsigned char*>(blob.data()),
            blob.length()
            );
    }
    catch(const std::exception& e)
    {
    }
}

void ImageItem::rotate(short degrees)
{
  if (!degrees)
    return;

  QString file = absoluteFilePath();
  Magick::Image image;
  image.read(file.toStdString());
  image.rotate(degrees);
  image.write(file.toStdString());

  Magick::Blob buffer;
  image.write(&buffer);

  QImage thumbnail;
  thumbnail.loadFromData((const uchar*) buffer.data(), buffer.length());
  thumbnail.save(absoluteThumbPath(), "JPEG");
}