Function storeTga

tutorials/common/image/tga.cpp:13–41

  inline void fwrite_ushort(unsigned short v, std::fstream& file) { file.write((const char*)&v,sizeof(v)); }

  void storeTga(const Ref<Image>& img, const FileName& fileName)
  {
    /* open file for reading */
    std::fstream file;
    file.exceptions (std::fstream::failbit | std::fstream::badbit);
    file.open (fileName.c_str(), std::fstream::out | std::fstream::binary);

    fwrite_uchar(0x00, file);
    fwrite_uchar(0x00, file);
    fwrite_uchar(0x02, file);
    fwrite_ushort(0x0000, file);
    fwrite_ushort(0x0000, file);
    fwrite_uchar(0x00, file);
    fwrite_ushort(0x0000, file);
    fwrite_ushort(0x0000, file);
    fwrite_ushort((unsigned short)img->width , file);
    fwrite_ushort((unsigned short)img->height, file);
    fwrite_uchar(0x18, file);
    fwrite_uchar(0x20, file);

    for (size_t y=0; y<img->height; y++) {
      for (size_t x=0; x<img->width; x++) {
        Color c = img->get(x,y);
        fwrite_uchar((unsigned char)(clamp(c.b)*255.0f), file);
        fwrite_uchar((unsigned char)(clamp(c.g)*255.0f), file);
        fwrite_uchar((unsigned char)(clamp(c.r)*255.0f), file);
      }
    }
  }

  inline unsigned char  fread_uchar (std::fstream& file) { unsigned char  v; file.read((char*)&v,sizeof(v)); return v; }
  inline unsigned short fread_ushort(std::fstream& file) { unsigned short v; file.read((char*)&v,sizeof(v)); return v; }