tools::image::iterator_reader Class Reference

Inheritance diagram for tools::image::iterator_reader:

Collaboration diagram for tools::image::iterator_reader:

Public Member Functions
virtual unsigned char *	read_image (unsigned int &a_w, unsigned int &a_h, unsigned int &a_bpp)
virtual bool	begin_file (std::string &)=0
virtual bool	end_file (const std::string &)=0
	iterator_reader (std::ostream &a_out, unsigned int a_limit)
virtual	~iterator_reader ()
	iterator_reader (const iterator_reader &a_from)
iterator_reader &	operator= (const iterator_reader &a_from)
void	add_reader (ireader *a_reader)
Public Member Functions inherited from tools::image::iterator
virtual	~iterator ()
virtual unsigned int	entries () const =0
virtual bool	next ()=0
virtual bool	rewind ()=0
virtual unsigned int	index () const =0

Protected Member Functions
unsigned char *	_open (const image::ireader &a_reader, const std::string &a_path, unsigned int &a_w, unsigned int &a_h, unsigned int &a_bpp)
void	_clean ()
void	_copy (const std::vector< ireader * > &a_from)

Protected Attributes
std::ostream &	m_out
unsigned int	m_limit
std::vector< ireader * >	m_readers

Detailed Description

Definition at line 279 of file image.

Constructor & Destructor Documentation

iterator_reader() [1/2]

tools::image::iterator_reader::iterator_reader ( std::ostream &  a_out, unsigned int  a_limit  )

inline

Definition at line 309 of file image.

  :m_out(a_out)
  ,m_limit(a_limit)
  {
#ifdef TOOLS_MEM
    mem::increment(s_class().c_str());
#endif
  }

~iterator_reader()

virtual tools::image::iterator_reader::~iterator_reader ( )

inlinevirtual

Definition at line 317 of file image.

                            {
    _clean();
#ifdef TOOLS_MEM
    mem::decrement(s_class().c_str());
#endif
  }

iterator_reader() [2/2]

tools::image::iterator_reader::iterator_reader ( const iterator_reader &  a_from )

inline

Definition at line 324 of file image.

  :iterator(a_from)
  ,m_out(a_from.m_out)
  ,m_limit(a_from.m_limit)
  {
#ifdef TOOLS_MEM
    mem::increment(s_class().c_str());
#endif
    _copy(a_from.m_readers);
  }

Member Function Documentation

_clean()

void tools::image::iterator_reader::_clean ( )

inlineprotected

Definition at line 407 of file image.

                {
    std::vector<ireader*>::iterator it;
    for(it=m_readers.begin();it!=m_readers.end();) {
      ireader* obj = *it;
      it = m_readers.erase(it);
      delete obj;
    }
  }

_copy()

void tools::image::iterator_reader::_copy ( const std::vector< ireader * > &  a_from )

inlineprotected

Definition at line 415 of file image.

                                                {
    _clean();
    tools_vforcit(ireader*,a_from,it) m_readers.push_back((*it)->copy());
  }

_open()

unsigned char* tools::image::iterator_reader::_open ( const image::ireader &  a_reader, const std::string &  a_path, unsigned int &  a_w, unsigned int &  a_h, unsigned int &  a_bpp  )

inlineprotected

Definition at line 345 of file image.

                                           {
    // permit to put in common code for jpeg and png.
 
    unsigned char* buffer = 0;
 
    if(m_limit) {
      if(!a_reader.infos(m_out,a_path,a_w,a_h,a_bpp)) {
        m_out << "tools::image::iterator_reader::_open :"
              << " for file " << sout(a_path)
              << " ireader::infos failed."
              << std::endl;
        a_w = 0;a_h = 0;a_bpp = 0;
        return 0;
      }
      if((a_w*a_h*a_bpp)>m_limit) {
 
        //unsigned int sw;
        //unsigned int sh;
        //float aspect = float(w)/float(h);
        //if(aspect>=1) {
        //  sh = 2;
        //  sw = aspect*sh;
        //} else {
        //  sw = 2;
        //  sh = sw/aspect;
        //}
 
        unsigned int sw = 2;
        unsigned int sh = 2;
        while(true) {
          if(((2*sw)*(2*sh)*a_bpp)>m_limit) break;
          sw *=2;
          sh *=2;
        }
 
        unsigned int sx = (a_w-sw)/2;
        unsigned int sy = (a_h-sh)/2;
 
        buffer = a_reader.read_part
                   (m_out,a_path,sx,sy,sw,sh,a_w,a_h,a_bpp);
      } else {
        buffer = a_reader.read(m_out,a_path,a_w,a_h,a_bpp);
      }
    } else {
      buffer = a_reader.read(m_out,a_path,a_w,a_h,a_bpp);
    }
 
    if(!buffer) {
      m_out << "tools::image::iterator_reader::_open :"
            << " for file " << sout(a_path)
            << " read failed."
            << std::endl;
      a_w = 0;a_h = 0;a_bpp = 0;
      return 0;
    }
 
    return buffer;
  }

add_reader()

void tools::image::iterator_reader::add_reader ( ireader *  a_reader )

inline

Definition at line 341 of file image.

                                     {
    m_readers.push_back(a_reader); //take ownership.
  }

begin_file()

virtual bool tools::image::iterator_reader::begin_file ( std::string &  )

pure virtual

end_file()

virtual bool tools::image::iterator_reader::end_file ( const std::string &  )

pure virtual

operator=()

iterator_reader& tools::image::iterator_reader::operator= ( const iterator_reader &  a_from )

inline

Definition at line 334 of file image.

                                                           {
    if(&a_from==this) return *this;
    m_limit = a_from.m_limit;
    _copy(a_from.m_readers);
    return *this;
  }

read_image()

virtual unsigned char* tools::image::iterator_reader::read_image ( unsigned int &  a_w, unsigned int &  a_h, unsigned int &  a_bpp  )

inlinevirtual

Implements tools::image::iterator.

Definition at line 288 of file image.

                                                         {
 
    std::string file;
    if(begin_file(file)) {
      tools_vforcit(image::ireader*,m_readers,it) {
        if((*it)->is(file)) {
          unsigned char* buffer = _open(*(*it),file,a_w,a_h,a_bpp);
          end_file(file);
          return buffer;
        }
      }
      end_file(file);
    }
    a_w = 0;a_h = 0;a_bpp = 0;
    return 0;
  }

Member Data Documentation

m_limit

unsigned int tools::image::iterator_reader::m_limit

protected

Definition at line 421 of file image.

m_out

std::ostream& tools::image::iterator_reader::m_out

protected

Definition at line 420 of file image.

m_readers

std::vector<ireader*> tools::image::iterator_reader::m_readers

protected

Definition at line 422 of file image.

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The documentation for this class was generated from the following file:

• /Users/barrand/private/dev/softinex/g4tools/g4tools/tools/image