Add addon fpdf module png image_alpha for test
This commit is contained in:
Regis Houssin
parent
e9e2e66ffc
commit
d746d1133f
@ -11,9 +11,9 @@
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/* Begin DOLCHANGE Added by Regis */
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// height of cell repect font height
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define("K_CELL_HEIGHT_RATIO", 1.25);
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// R<EFBFBD>pertoire des documents de fckeditor
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// Repertoire des documents de fckeditor
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if (! empty($conf->fckeditor->dir_output)) define ("K_PATH_CACHE", $conf->fckeditor->dir_output);
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// url qui sera substituer par le K_PATH_CACHE lorsqu'une image sera int<EFBFBD>gr<EFBFBD>e au pdf
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// url qui sera substituer par le K_PATH_CACHE lorsqu'une image sera integree au pdf
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if (defined('DOL_URL_ROOT')) define ("K_PATH_URL_CACHE", DOL_URL_ROOT."/document.php?modulepart=editor&file=");
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/* End DOLCHANGE Added by Regis */
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@ -85,7 +85,7 @@ var $PDFVersion; //PDF version number
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var $prevFontFamily; //store previous font family
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var $prevFontStyle; //store previous style family
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var $DisplayPreferences=''; //pr<EFBFBD>f<EFBFBD>rences d'affichage
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var $DisplayPreferences=''; //preferences d'affichage
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// variables pour HTML PARSER
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295
htdocs/includes/fpdf/fpdf/image_alpha.php
Executable file
295
htdocs/includes/fpdf/fpdf/image_alpha.php
Executable file
@ -0,0 +1,295 @@
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<?php
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require('fpdf.php');
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class PDF_ImageAlpha extends FPDF
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{
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//Private properties
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var $tmpFiles = array();
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/*******************************************************************************
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* *
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* Public methods *
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* *
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*******************************************************************************/
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function Image($file, $x=null, $y=null, $w=0, $h=0, $type='', $link='', $isMask=false, $maskImg=0)
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{
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//Put an image on the page
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if(!isset($this->images[$file]))
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{
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//First use of this image, get info
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if($type=='')
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{
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$pos=strrpos($file,'.');
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if(!$pos)
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$this->Error('Image file has no extension and no type was specified: '.$file);
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$type=substr($file,$pos+1);
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}
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$type=strtolower($type);
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if($type=='png'){
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$info=$this->_parsepng($file);
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if($info=='alpha')
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return $this->ImagePngWithAlpha($file,$x,$y,$w,$h,$link);
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}
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else
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{
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if($type=='jpeg')
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$type='jpg';
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$mtd='_parse'.$type;
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if(!method_exists($this,$mtd))
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$this->Error('Unsupported image type: '.$type);
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$info=$this->$mtd($file);
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}
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if($isMask){
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if(in_array($file,$this->tmpFiles))
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$info['cs']='DeviceGray'; //hack necessary as GD can't produce gray scale images
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if($info['cs']!='DeviceGray')
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$this->Error('Mask must be a gray scale image');
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if($this->PDFVersion<'1.4')
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$this->PDFVersion='1.4';
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}
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$info['i']=count($this->images)+1;
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if($maskImg>0)
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$info['masked'] = $maskImg;
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$this->images[$file]=$info;
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}
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else
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$info=$this->images[$file];
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//Automatic width and height calculation if needed
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if($w==0 && $h==0)
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{
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//Put image at 72 dpi
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$w=$info['w']/$this->k;
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$h=$info['h']/$this->k;
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}
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elseif($w==0)
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$w=$h*$info['w']/$info['h'];
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elseif($h==0)
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$h=$w*$info['h']/$info['w'];
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//Flowing mode
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if($y===null)
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{
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if($this->y+$h>$this->PageBreakTrigger && !$this->InHeader && !$this->InFooter && $this->AcceptPageBreak())
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{
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//Automatic page break
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$x2=$this->x;
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$this->AddPage($this->CurOrientation,$this->CurPageFormat);
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$this->x=$x2;
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}
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$y=$this->y;
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$this->y+=$h;
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}
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if($x===null)
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$x=$this->x;
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if(!$isMask)
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$this->_out(sprintf('q %.2F 0 0 %.2F %.2F %.2F cm /I%d Do Q',$w*$this->k,$h*$this->k,$x*$this->k,($this->h-($y+$h))*$this->k,$info['i']));
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if($link)
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$this->Link($x,$y,$w,$h,$link);
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return $info['i'];
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}
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// needs GD 2.x extension
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// pixel-wise operation, not very fast
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function ImagePngWithAlpha($file,$x,$y,$w=0,$h=0,$link='')
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{
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$tmp_alpha = tempnam('.', 'mska');
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$this->tmpFiles[] = $tmp_alpha;
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$tmp_plain = tempnam('.', 'mskp');
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$this->tmpFiles[] = $tmp_plain;
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list($wpx, $hpx) = getimagesize($file);
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$img = imagecreatefrompng($file);
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$alpha_img = imagecreate( $wpx, $hpx );
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// generate gray scale pallete
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for($c=0;$c<256;$c++)
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ImageColorAllocate($alpha_img, $c, $c, $c);
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// extract alpha channel
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$xpx=0;
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while ($xpx<$wpx){
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$ypx = 0;
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while ($ypx<$hpx){
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$color_index = imagecolorat($img, $xpx, $ypx);
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$col = imagecolorsforindex($img, $color_index);
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imagesetpixel($alpha_img, $xpx, $ypx, $this->_gamma( (127-$col['alpha'])*255/127) );
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++$ypx;
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}
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++$xpx;
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}
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imagepng($alpha_img, $tmp_alpha);
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imagedestroy($alpha_img);
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// extract image without alpha channel
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$plain_img = imagecreatetruecolor ( $wpx, $hpx );
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imagecopy($plain_img, $img, 0, 0, 0, 0, $wpx, $hpx );
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imagepng($plain_img, $tmp_plain);
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imagedestroy($plain_img);
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//first embed mask image (w, h, x, will be ignored)
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$maskImg = $this->Image($tmp_alpha, 0,0,0,0, 'PNG', '', true);
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//embed image, masked with previously embedded mask
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$this->Image($tmp_plain,$x,$y,$w,$h,'PNG',$link, false, $maskImg);
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}
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function Close()
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{
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parent::Close();
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// clean up tmp files
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foreach($this->tmpFiles as $tmp)
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@unlink($tmp);
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}
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/*******************************************************************************
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* *
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* Private methods *
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* *
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*******************************************************************************/
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function _putimages()
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{
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$filter=($this->compress) ? '/Filter /FlateDecode ' : '';
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reset($this->images);
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while(list($file,$info)=each($this->images))
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{
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$this->_newobj();
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$this->images[$file]['n']=$this->n;
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$this->_out('<</Type /XObject');
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$this->_out('/Subtype /Image');
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$this->_out('/Width '.$info['w']);
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$this->_out('/Height '.$info['h']);
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if(isset($info['masked']))
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$this->_out('/SMask '.($this->n-1).' 0 R');
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if($info['cs']=='Indexed')
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$this->_out('/ColorSpace [/Indexed /DeviceRGB '.(strlen($info['pal'])/3-1).' '.($this->n+1).' 0 R]');
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else
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{
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$this->_out('/ColorSpace /'.$info['cs']);
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if($info['cs']=='DeviceCMYK')
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$this->_out('/Decode [1 0 1 0 1 0 1 0]');
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}
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$this->_out('/BitsPerComponent '.$info['bpc']);
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if(isset($info['f']))
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$this->_out('/Filter /'.$info['f']);
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if(isset($info['parms']))
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$this->_out($info['parms']);
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if(isset($info['trns']) && is_array($info['trns']))
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{
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$trns='';
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for($i=0;$i<count($info['trns']);$i++)
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$trns.=$info['trns'][$i].' '.$info['trns'][$i].' ';
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$this->_out('/Mask ['.$trns.']');
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}
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$this->_out('/Length '.strlen($info['data']).'>>');
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$this->_putstream($info['data']);
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unset($this->images[$file]['data']);
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$this->_out('endobj');
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//Palette
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if($info['cs']=='Indexed')
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{
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$this->_newobj();
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$pal=($this->compress) ? gzcompress($info['pal']) : $info['pal'];
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$this->_out('<<'.$filter.'/Length '.strlen($pal).'>>');
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$this->_putstream($pal);
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$this->_out('endobj');
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}
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}
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}
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// GD seems to use a different gamma, this method is used to correct it again
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function _gamma($v){
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return pow ($v/255, 2.2) * 255;
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}
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// this method overriding the original version is only needed to make the Image method support PNGs with alpha channels.
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// if you only use the ImagePngWithAlpha method for such PNGs, you can remove it from this script.
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function _parsepng($file)
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{
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//Extract info from a PNG file
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$f=fopen($file,'rb');
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if(!$f)
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$this->Error('Can\'t open image file: '.$file);
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//Check signature
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if($this->_readstream($f,8)!=chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10))
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$this->Error('Not a PNG file: '.$file);
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//Read header chunk
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$this->_readstream($f,4);
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if($this->_readstream($f,4)!='IHDR')
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$this->Error('Incorrect PNG file: '.$file);
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$w=$this->_readint($f);
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$h=$this->_readint($f);
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$bpc=ord($this->_readstream($f,1));
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if($bpc>8)
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$this->Error('16-bit depth not supported: '.$file);
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$ct=ord($this->_readstream($f,1));
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if($ct==0)
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$colspace='DeviceGray';
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elseif($ct==2)
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$colspace='DeviceRGB';
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elseif($ct==3)
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$colspace='Indexed';
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else {
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fclose($f); // the only changes are
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return 'alpha'; // made in those 2 lines
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}
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if(ord($this->_readstream($f,1))!=0)
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$this->Error('Unknown compression method: '.$file);
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if(ord($this->_readstream($f,1))!=0)
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$this->Error('Unknown filter method: '.$file);
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if(ord($this->_readstream($f,1))!=0)
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$this->Error('Interlacing not supported: '.$file);
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$this->_readstream($f,4);
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$parms='/DecodeParms <</Predictor 15 /Colors '.($ct==2 ? 3 : 1).' /BitsPerComponent '.$bpc.' /Columns '.$w.'>>';
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//Scan chunks looking for palette, transparency and image data
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$pal='';
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$trns='';
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$data='';
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do
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{
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$n=$this->_readint($f);
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$type=$this->_readstream($f,4);
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if($type=='PLTE')
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{
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//Read palette
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$pal=$this->_readstream($f,$n);
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$this->_readstream($f,4);
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}
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elseif($type=='tRNS')
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{
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//Read transparency info
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$t=$this->_readstream($f,$n);
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if($ct==0)
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$trns=array(ord(substr($t,1,1)));
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elseif($ct==2)
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$trns=array(ord(substr($t,1,1)), ord(substr($t,3,1)), ord(substr($t,5,1)));
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else
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{
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$pos=strpos($t,chr(0));
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if($pos!==false)
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$trns=array($pos);
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}
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$this->_readstream($f,4);
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}
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elseif($type=='IDAT')
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{
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//Read image data block
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$data.=$this->_readstream($f,$n);
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$this->_readstream($f,4);
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}
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elseif($type=='IEND')
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break;
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else
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$this->_readstream($f,$n+4);
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}
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while($n);
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if($colspace=='Indexed' && empty($pal))
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$this->Error('Missing palette in '.$file);
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fclose($f);
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return array('w'=>$w, 'h'=>$h, 'cs'=>$colspace, 'bpc'=>$bpc, 'f'=>'FlateDecode', 'parms'=>$parms, 'pal'=>$pal, 'trns'=>$trns, 'data'=>$data);
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}
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}
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?>
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