<?php
// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based picture gallery                                  |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008      Piwigo Team                  http://piwigo.org |
// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
// +-----------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify  |
// | it under the terms of the GNU General Public License as published by  |
// | the Free Software Foundation                                          |
// |                                                                       |
// | This program is distributed in the hope that it will be useful, but   |
// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
// | General Public License for more details.                              |
// |                                                                       |
// | You should have received a copy of the GNU General Public License     |
// | along with this program; if not, write to the Free Software           |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA.                                                                  |
// +-----------------------------------------------------------------------+

/**
 * This file is included by the picture page to manage picture metadata
 *
  Release 2.0.1 fix translation with common.lang.php definition
  Release 2.0.2   manage 50D
  Release 2.0.3/4 default 35mm focal length calculation for most common cameras / DSLR
  All cameras will take benefit from this file, but the Canon at most. 
  If you have a non Canon body and would like to see the MakerNotes, follow the metadata information, e.g. from 
  http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/ and enhance this file!
 */
include_once(PHPWG_ROOT_PATH.'/include/functions_metadata.inc.php');
if (($conf['show_exif']) and (function_exists('read_exif_data')))
{
  if ($exif = @read_exif_data($picture['current']['image_path']))
  {
    $exif = trigger_event('format_exif_data', $exif, $picture['current'] );
 
    $tpl_meta = array(
        'TITLE' => 'EXIF Metadata',
        'lines' => array(),
      );

    // register make and model
    if (in_array('Make', $exif))    
	{ $make = trim($exif['Make']); }
    else 
    	{ $make = 'n/a'; }
    if (in_array('Model', $exif)) 
	{ $model = trim($exif['Model']); }
    else 
     	{ $model ='n/a'; }
   	
    foreach ($conf['show_exif_fields'] as $field)
    {
      if (strpos($field, ';') === false)
      {  /*  ===> gbo modification  */
	if (isset($exif[$field])) 
	{
	   // Look for Canon EOS camera
	   if ($field == 'ModeArray') // Canon CameraSettings tags
	   {
		if ($make === 'Canon') // for Canon EOS and PowerShot/Ixus
   		{ improve_meta_canon($exif[$field]); }
	   }
	   else
	   {		
		$key = $field; 
		Conversion($key, $exif[$field], $model, $make);
        	if (isset($lang['exif_field_'.$field]))
		{
			$key = $lang['exif_field_'.$field];
		}		 
	   }
        // $tpl_meta['lines'][$key] = $exif[$field];
	}
      }
      else
      {
 	$tokens = explode(';', $field);
        if (isset($exif[$tokens[0]][$tokens[1]]))
        {
           $key = $tokens[1];
           if (isset($lang['exif_field_'.$tokens[1]]))
           {
              $key = $lang['exif_field_'.$tokens[1]];
           }
           $tpl_meta['lines'][$key] = $exif[$tokens[0]][$tokens[1]];
        }
      }
    }
    $template->append('metadata', $tpl_meta);
  }
}

if ($conf['show_iptc'])
{
  $iptc = get_iptc_data($picture['current']['image_path'],
                        $conf['show_iptc_mapping']);

  if (count($iptc) > 0)
  {
    $tpl_meta = array(
        'TITLE' => 'IPTC Metadata',
        'lines' => array(),
      );

    foreach ($iptc as $field => $value)
    {
      $key = $field;
      if (isset($lang[$field]))
      {
        $key = $lang[$field];
      }
      $tpl_meta['lines'][$key] = $value;
    }
    $template->append('metadata', $tpl_meta);
  }
}



function Conversion($key, $data, $model, $make)
{ 
	global $tpl_meta, $lang;
	// simplify make
	$makeLow = strtolower($make); $makeR = $make;
	if (strpos($makeLow, 'olympus') === 0 )
	{	$makeR = 'Olympus'; }
	else if (strpos($makeLow, 'nikon') === 0 )
	{	$makeR = 'Nikon'; }
	else if (strpos($makeLow, 'pentax') === 0 )
	{ 	$makeR = 'Pentax'; }
	else if (strpos($makeLow, 'sony') === 0 )
	{ 
		$makeR = 'Sony'; 
	}

	// proceed and rename key to have user readable english name. The lang file should transalate these new keys.
	if ($key==='Model')
	{ 	// merge make and model if model does not already contain make
		//if ($make <> 'Canon' && $makeR <> 'Pentax') 
		if (strpos( strtolower($model),  strtolower($makeR)) === false )
		{   $data = $makeR.' '.$data; }		
	}
	if ($key==='ExposureBiasValue')  
	{	
		$key = 'ExposureCompensation';
		$data = compute_fraction($data) ;
		$data = round($data,2);
		if ($data>0) {$data='+'.$data;} 
		if ($data == 0) { $data = ""; }
		else { $data.=' EV'; }
	}		
	if ($key==='ExposureTime') 
	{
		$key = 'ExposureTime';
		$data = compute_fraction($data) ;
		if ($data<1)	
		{
			$data=1/$data;
			$data="1/".$data ; 
		}
		$data.="s";
	}   
	if ($key==='ShutterSpeedValue')
	{
		$key = 'ShutterSpeed';
	}
	if ($key=='FNumber') 
	{	
		$key = 'Aperture';
		$data = compute_fraction($data) ;
		$data = 'f/'. $data;
	}
	if ($key=="MaxApertureValue") 
	{ 	
		$key = 'MaxAperture';
		$data = compute_fraction($data) ;
		$data = round($data,1);
		$data = 'f/'. $data;
	}
   	if ($key==='FocalLength')
	{	
		$key = 'FocalLength';
		$data = compute_fraction($data) ;
		$data .='mm';	
		// first look for 35mm eq in meta, else make the calculation
		if (isset($exif['FocalLengthIn35mmFilm'])) 
		{
			$f35 = compute_fraction($exif['FocalLengthIn35mmFilm']) ;
		} 
		else 
		{
			$cropFactor = CalculateCropFactor($model, $makeR);
			if ($cropFactor > 1)
			{ $f35 = $data*$cropFactor; }
		}
		if (isset($f35)) 
		{
			$data.=' (equiv 24x36: '.round($f35,0).'mm)';
		}
	}


       	if ($key==='Flash')
	{ 
		if ($make === 'Canon') 
		{ // disable it for Canon, as maker notes will be used
			$data="";
		}
		else
		{  // it seems that most camera are using a even value for "not fired" and an odd value for "fired"
			if ($data%2 == 0)
			{  $data=""; } //did not fire
			else
			{  $data="on"; } // 1 on olympus camera, 9 or 25 on panasonic
		}
	}
	if ($key==='UndefinedTag:0x0095' and $make === 'Canon')
	{
		$key = 'LensName';
	}
	if ($key==='ISOSpeedRatings')
	{
		$key = 'ISO';
	}
	if ($key==='DateTimeOriginal')
	{
		$key = 'TakenDate';
	}	
	if ($data!="" ) 
	{
		if (isset($lang['exif_field_'.$key]))
        	  { $key = $lang['exif_field_'.$key]; }
        	$tpl_meta['lines'][$key] = $data;
    	}
}

function compute_fraction($data)
{ 
	$tokens = explode('/', $data);
	if (count($tokens)!=2) return $data ;
	if ( $tokens[1] == 0 ) return $data ;
	return floatval($tokens[0]) / floatval($tokens[1]) ;
}

// Calculate the crop factor of the camera which will be used for the 35mm focal length equivalence
function CalculateCropFactor($model, $make)
{
	// set the crop factor
	$cropFactor = 6; // average crop factor for compact cameras, for 1/2.5" sensor
	if (strpos($model, 'Canon EOS') !== false) // only Canon EOS cameras
	{
		if (strpos($model, '0') > 0) // all APS-C models have a 0 in their name (Dx0, x0D, xx0D, x000D)
		{ $cropFactor = 1.6; }
        	else if (strpos($model, '1D ') > 0)  //1D body
		{ $cropFactor = 1.3; }
		else { $cropFactor = 1; }  //1Ds and 5D body
	}
	else if ($make === 'Nikon' && strpos($model, 'D') !== false ) // all Nikon DSLR start with "D"
	{
		if (strpos($model, 'D3') !== false || strpos($model, 'D700') !== false)
		{ 	$cropFactor = 1; }
		else {  $cropFactor = 1.5; }
	}
	else if ($make === 'Sony'  && strpos($model, 'DSLR-A') !== false) // DSLR Alpha
	{
		if (strpos($model, 'A900') !== false)
		{ 	$cropFactor = 1; }
		else {  $cropFactor = 1.5; }
	}
	else if ($make === 'Pentax' && strpos($model, 'K') !== false ) // all Pentax DSLR start with "K"
	{	$cropFactor = 1.5;  }
	else if ($make === 'Olympus') // all Olympus DSLR start with "E"
	{
	 	if  (strpos($model, 'E') === 0)
		{
		    if (strpos($model, 'E-10') !== false || strpos($model, 'E-20') !== false)
		    {   $cropFactor = 3.88;  }   // sensor size: 8.8x6.6, 2/3"
		    else 
		    {   $cropFactor = 2;  }   // sensor size: 18x13.5mm
		}
		else if ($model === 'C2040Z') // Eric's old compact camera
		{   	$cropFactor = 5.48;  } // sensor size: 1/2"
	}

	return $cropFactor;
}

function improve_meta_canon($subarray)
{
  global $tpl_meta, $lang, $model;
  $isEOS = strpos($model, 'Canon EOS') !== false ;
  if (is_array ($subarray) )
  {
	$maxLen = '';  // will be set for the minLen and displayed together
	foreach ($subarray as $Elem => $subval)
	{
		$data= ""; 
		$key ="";
		switch ($Elem) 
		{	
		    case 1: // added
		    	$key="Macro Mode";
			switch($subval) 
			{
				case 1: $data="Macro"; break;
				//case 2: $data="Normal"; break; // do not display if set
			}
			break;
		    case 2:
			if ($subval  > 0)
			{
				$key="SelfTimer";
				$data.=$subval/10; 
			  	$data=$data.' s';
			}
			break;		
		    case 3:
			$key="ImageQuality";
			switch($subval) 
			{
				case 2: $data.="Normal"; break;
				case 3: $data.="Fine"; break;
				case 4: $data.="Raw"; break;
				case 5: $data.="Superfine"; break;
			     // default : $data.' ?';
			}
			break;							 
		    case 4:
			$key="Flash Mode";
			switch($subval) 
			{
			  	case 0: $data.=''; break; //Off
				case 1: $data.="Auto"; break;
				case 2: $data.="On"; break;
				case 3: $data.="Red Eye Reduction"; break;
				case 4: $data.="Slow Synchro"; break;
				case 5: $data.="Auto + Red Eye Reduction"; break;
				case 6: $data.="On + Red Eye Reduction"; break;
			        case 16: $data.="External" ; break;
			}
			break;							 
		    case 5:
			$key="Drive";
			switch($subval) 
			{
				case 0: $data.="Single"; break;
				case 1: $data.="Continus"; break;
				case 2: $data.="Movie"; break;
				case 3: $data.="Continuous, Speed Priority"; break;
				case 4: $data.="Continus Low"; break;
				case 5: $data.="Continus High"; break;
				default : $data.=$subval.' ?';
			}
			break; 							 
		    case 7: 
			$key="FocusMode";
			switch($subval) 
			{
				case 0: $data.='One-shot AF'; break;
				case 1: $data.='AI Servo AF'; break;
				case 2: $data.='AI Focus AF'; break;
				case 3: $data.='Manual Focus'; break;
				case 4: $data.='Single'; break;
				case 5: $data.='Continuous'; break;
				case 6: $data.='Manual Focus'; break;
				default: $data.='Autre ('.$subval.')' ; break; 
			} 
			break;						
		    case 10: 
			$key="ImageSize";
			switch($subval) 
			{
				case 0: $data.='Large'; break;
				case 1: $data.='Medium'; break;
				case 2: $data.='Small'; break;
				//    default : $data.=$subval.' ?';
			}
			break;							
		    case 11:
			$key="ShootingMode";
			switch($subval) 
			{
				case 0: $data.="Full Auto"; break;
				// no display if  off case 1: $data.="Manual"; break;
				case 2: $data.="Landscape"; break;
				case 3: $data.="Fast Shutter"; break;
				case 4: $data.="Slow Shutter"; break;
				case 5: $data.="Night"; break;
				case 6: $data.="Black & White"; break;
				case 7 : $data.="Sepia"; break;
				case 8: $data.="Portrait"; break;
				case 9: $data. "Sports"; break;
				case 10: $data. "Macro / Close-Up"; break;
				case 11: $data.="Pan Focus"; break;
				//  default : $data.=$subval.' ?';
			}
			break;
		   // Contrast, Saturation, Sharpness are only interessting for those shooting direclty in JPG
		   // Otherwise, it display the RAW value, which are not very relevant IMHO as further enhancements are made in JPG processing
		   // That's why they are commented 
		   /*case 13:
			$key="Contrast";
			$data.=$subval; 
			break;			 
		    case 14:
			$key="Saturation";
			$data.=$subval; 
			break;										 
		    case 15:
			$key="Sharpness";
			if ($subval > 3200) {$subval ='Normal';}
			$data.=$subval; 
			break; */
		    case 17:
			$key = "MeteringMode";
			switch($subval)
			{
				case 0: $data ='Default'; break;
				case 1: $data ='Spot'; break;
				case 2: $data ='Average'; break;
				case 3: $data ='Evaluative'; break;
				case 4: $data ='Partial'; break;
				case 5: $data ='weighted average'; break;
				default : $data.=$subval.' ?';
			}  
			break;
		    case 19:
			$key="AFPointSelected"; 
			// seems to be valid only for compact cameras, own tests with EOS camera already retrieve 0.
			if ($isEOS) 
			{ $data=''; }
			else
			{
			    switch($subval) 
			    {
				case 0: $data = "";
				case 0x3000: $data="None (Manual Focus)"; break;
				case 0x3001: $data="Auto Selected"; break;
				case 0x3002: $data="Right"; break;
				case 0x3003: $data="Centre"; break;
				case 0x3004: $data="Left" ; break;
				case 0x4001: $data="Auto AF point Selection"; break;
				case 0x2005: $data="Manual AF point Selected"; break;
				default: $data="Reserved (".$subval.")"; break;
			    }
			}			
			break;
		    case 20:
			$key="ExposureProgram";
			switch($subval) 
			{
				case 0: $data.='Auto'; break;
				case 1: $data.='Program'; break;
				case 2: $data.='Shutter priority (Tv)'; break;
				case 3: $data.='Aperture Priority (Av)'; break;
				case 4: $data.='Manual'; break;
				case 5: $data.='Depth-of-field'; break;
				case 6: $data.='M-Dep'; break;
				case 7: $data.='Bulb'; break;
			}
			break;			 
		    case 23: // proceed both max and min focal length together
			$key="Max. Focal";
			if ($subval > 4000)	{ $subval /= 1000;}   // for compact cameras
			$maxLen=$subval; 
			$data=""; // do not show the max len
			//$data.=$subval." mm"; 
			break;										 
		    case 24:
			// $key="Min. Focal ";
			if ($subval > 4000)	{ $subval /= 1000;}  // for compact cameras
			if ($subval <> $maxLen)
			{
		  		$key="LensFocalRange";
				$data=$subval."-".$maxLen."mm";
			}
			else 
			{
				$key="FixedFocalLens";
				$data.=$subval." mm";
			}
			break;			    
		    case 28:
			$key="FlashActivity";
			switch($subval) 
			{
				// no display if  off case 0: $data.="Not fired"; break;
				case 1: $data.=" Fired"; break;
				//     default : $data.=$subval.' ?';
			}
			break;	 
		    case 29:
			$key="FlashDetail";
			switch($subval) 
			{
				case 4: $data="FP sync enabled"; break;
				case 7: $data="2nd(rear)-curtain sync used"; break;
				case 11: $data="FP sync used"; break;
				case 13: $data="internal flash"; break;
				case 14: $data="External E-TTL"; break;		
			}
			break;			
		    case 34:
			$key ='Stabilization'; // for compact?
			switch($subval) 
			{
				case 0: $data.='Off'; break;
				case 1: $data.='On'; break;
				case 2: $data.='On, Shot Only'; break;
				case 3: $data.='On, Panning';break;
				//	  default : $data.=$subval.' ?';
			}
			break;				  
		    case 39: 
                	$key ='SpotMeteringMode';
			switch($subval) 
			{
				case 0: $data.='Center'; break;
				case 1: $data.='AF point'; break;
				//  default : $data.=$subval.' ?';
			}
			break;
		} // switch($Elem)

		if ($data!="" )
		{
			if (isset($lang['exif_field_'.$key]))
	        	{ 	$key = $lang['exif_field_'.$key];}
			$tpl_meta['lines'][$key] = $data;; 
		} 
	} // foreach
  } // if(is_array)
} // function

/*    ///////////////////////////////// 
	copy  in config_local.inc.php
  ///////////////////////////////////
// exemple of interesting parameters 
$conf['show_exif_fields'] = array(
	'Model',
	'ExposureTime',
	'ExposureBiasValue',
	'FocalLength',
    'FNumber', 
    'ISOSpeedRatings', 
    'DateTimeOriginal',
    'Flash',
    'Lens',
    'ModeArray', 
    'UndefinedTag:0x0095'
)

 ///////////////////////////////// 
    Traduction Francaise
  Copier ce qui suit � la fin de : language/fr_FR/local.lang.php � l'aide de LocalFiles Editor, onglet "Language"
  ///////////////////////////////////
// Exif g�n�ralistes.
$lang['exif_field_Make'] = 'Marque';
$lang['exif_field_Model'] = 'Mod�le';
$lang['exif_field_ExposureCompensation'] = 'Correction Expo';
$lang['exif_field_ExposureTime'] = 'Vitesse';
$lang['exif_field_ShutterSpeed'] = 'Vitesse';
$lang['exif_field_Aperture'] = 'Ouverture diaph.';
$lang['exif_field_MaxAperture'] = 'Ouverture max';
$lang['exif_field_FocalLength'] = 'Focale';
$lang['exif_field_LensName'] = 'Objectif';
$lang['exif_field_TakenDate'] = 'Le';
// Exif plus sp�cifiques.
$lang['exif_field_ImageQuality'] = 'Qualit� Image';
$lang['exif_field_SelfTimer'] = 'Retardateur';
$lang['exif_field_Drive'] = "Mode d'acquisition";
$lang['exif_field_FocusMode'] = 'Mode focus';
$lang['exif_field_ImageSize'] = 'Taille image';
$lang['exif_field_ShootingMode'] =  'Mode auomatique';
$lang['exif_field_Contrast'] = 'Contraste';
$lang['exif_field_Sharpness'] = 'Nettet�';
$lang['exif_field_MeteringMode'] = 'Mesure Expo.';
$lang['exif_field_AFPointSelected'] = 'Collimateur AF';
$lang['exif_field_ExposureProgram'] = 'Prog. Expo';
$lang['exif_field_LensFocalRange'] = 'Objectif zoom';
$lang['exif_field_FixedFocalLens'] = 'Objectif fixe';
$lang['exif_field_FlashActivity'] = 'Flash Opt';
$lang['exif_field_FlashDetail'] = 'D�tail param flash';
$lang['exif_field_Stabilization'] = 'Stabilisation';
$lang['exif_field_SpotMeteringMode'] = 'Mesure spot';

 ///////////////////////////////// 
    English translation
  copy at the end of file : language/en_EN/local.lang.php with LocalFiles Editor
  ///////////////////////////////////
//translate exif properties in English
// normal exif
$lang['exif_field_Make'] = 'Make';
$lang['exif_field_Model'] = 'Model';
$lang['exif_field_ExposureCompensation'] = 'Exposure Compensation';
$lang['exif_field_ExposureTime'] = 'Exposure Time';
$lang['exif_field_ShutterSpeed'] = 'Shutter Speed';
$lang['exif_field_Aperture'] = 'Aperture';
$lang['exif_field_MaxAperture'] = 'Max Aperture';
$lang['exif_field_FocalLength'] = 'Focal Length';
$lang['exif_field_LensName'] = 'Lens Name';
$lang['exif_field_TakenDate'] = 'Taken Date';
// further exif from MakerNotes
$lang['exif_field_ImageQuality'] = 'Image Quality';
$lang['exif_field_SelfTimer'] = 'Self Timer';
$lang['exif_field_Drive'] = "Drive";
$lang['exif_field_FocusMode'] = 'Focus Mode';
$lang['exif_field_ImageSize'] = 'Image Size';
$lang['exif_field_ShootingMode'] =  'Shooting Mode';
$lang['exif_field_Contrast'] = 'Contrast';
$lang['exif_field_Sharpness'] = 'Sharpness';
$lang['exif_field_MeteringMode'] = 'Metering Mode';
$lang['exif_field_AFPointSelected'] = 'AF Point Selected';
$lang['exif_field_ExposureProgram'] = 'Exposure Program';
$lang['exif_field_LensFocalRange'] = 'Lens Focal Range';
$lang['exif_field_FixedFocalLens'] = 'Fixed Focal Lens';
$lang['exif_field_FlashActivity'] = 'Flash Activity';
$lang['exif_field_FlashDetail'] = 'Flash Detail';
$lang['exif_field_Stabilization'] = 'Stabilization';
$lang['exif_field_SpotMeteringMode'] = 'Spot Metering Mode';

///////////////////////////////
/// Template/Plugin ajustment
// If you are using the template 'Look Like GBO' and enabling the EXIF as tooltip instead of below the picture, you may need to ajust the width of this tooltip: 
// e.g. 260px instead of 150
// \plugins\look_like_gbo2\css\sweettitles.css
// div#toolTip {position:absolute;z-index:1000;width:260px;background:#000;color:gray;border:2px solid #d3d3d3;padding:5px;min-height:1em;-moz-border-radius:5px}

*/
?>