evd::PNGView Class Reference

#include <PNGArena.h>

Public Member Functions
	PNGView (PNGArena &a)
png_byte &	operator() (int x, int y, int c)
png_byte	operator() (int x, int y, int c) const

Protected Attributes
PNGArena &	arena
std::vector< std::vector < png_byte * > >	blocks

Friends
JSONFormatter &	operator<< (JSONFormatter &, const PNGView &)

Detailed Description

Definition at line 69 of file PNGArena.h.

Constructor & Destructor Documentation

evd::PNGView::PNGView ( PNGArena &  a )

explicit

Definition at line 164 of file PNGArena.cxx.

                              : arena(a)
  {
  }

Member Function Documentation

png_byte& evd::PNGView::operator() ( int  x, int  y, int  c  )

inline

Definition at line 74 of file PNGArena.h.

    {
      const unsigned int ix = x/PNGArena::kBlockSize;
      const unsigned int iy = y/PNGArena::kBlockSize;
      if(ix >= blocks.size()) blocks.resize(ix+1);
      if(iy >= blocks[ix].size()) blocks[ix].resize(iy+1, 0);
      if(!blocks[ix][iy]) blocks[ix][iy] = arena.NewBlock();
      return blocks[ix][iy][((y-iy*PNGArena::kBlockSize)*PNGArena::kArenaSize+(x-ix*PNGArena::kBlockSize))*4+c];
    }

png_byte evd::PNGView::operator() ( int  x, int  y, int  c  ) const

inline

Definition at line 84 of file PNGArena.h.

    {
      const unsigned int ix = x/PNGArena::kBlockSize;
      const unsigned int iy = y/PNGArena::kBlockSize;
      if(ix >= blocks.size()) return 0;
      if(iy >= blocks[ix].size()) return 0;
      if(!blocks[ix][iy]) return 0;
      return blocks[ix][iy][((y-iy*PNGArena::kBlockSize)*PNGArena::kArenaSize+(x-ix*PNGArena::kBlockSize))*4+c];
    }

Friends And Related Function Documentation

JSONFormatter& operator<< ( JSONFormatter &  os, const PNGView &  v  )

friend

Definition at line 467 of file WebEVDServer.cxx.

{
  bool first = true;
  os << "{\"blocks\": [\n";
  for(unsigned int ix = 0; ix < v.blocks.size(); ++ix){
    for(unsigned int iy = 0; iy < v.blocks[ix].size(); ++iy){
      const png_byte* b = v.blocks[ix][iy];
      if(!b) continue;

      if(!first) os << ",\n";
      first = false;

      int dataidx = 0;
      for(unsigned int d = 0; d < v.arena.data.size(); ++d){
        if(b >= &v.arena.data[d]->front() &&
           b <  &v.arena.data[d]->front() + 4*PNGArena::kArenaSize*PNGArena::kArenaSize){
          dataidx = d;
          break;
        }
      }

      const int texdx = ((b-&v.arena.data[dataidx]->front())/4)%PNGArena::kArenaSize;
      const int texdy = ((b-&v.arena.data[dataidx]->front())/4)/PNGArena::kArenaSize;

      os << "{"
         << "\"x\": " << ix*PNGArena::kBlockSize << ", "
         << "\"y\": " << iy*PNGArena::kBlockSize << ", "
         << "\"dx\": " << PNGArena::kBlockSize << ", "
         << "\"dy\": " << PNGArena::kBlockSize << ", "
         << "\"fname\": \"" << v.arena.name << "_" << dataidx << "\", "
         << "\"texdim\": " << PNGArena::kArenaSize << ", "
         << "\"u\": " << texdx << ", "
         << "\"v\": " << texdy << ", "
         << "\"du\": " << PNGArena::kBlockSize << ", "
         << "\"dv\": " << PNGArena::kBlockSize
         << "}";
    }
  }
  os << "\n]}";
  return os;
}

Member Data Documentation

PNGArena& evd::PNGView::arena

protected

Definition at line 97 of file PNGArena.h.

std::vector<std::vector<png_byte*> > evd::PNGView::blocks

protected

Definition at line 99 of file PNGArena.h.

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

• PNGArena.h
• PNGArena.cxx