* @version 1.48 <2005/07/18> * @copyright GNU General Public License (GPL) **/ /* // Sample ------------------------------------- $thumb=new Thumbnail("source.jpg"); // set source image file $thumb->size_width(100); // set width for thumbnail, or $thumb->size_height(300); // set height for thumbnail, or $thumb->size_auto(200); // set the biggest width or height for thumbnail $thumb->size(150,113); // set the biggest width and height for thumbnail $thumb->quality=75; //default 75 , only for JPG format $thumb->output_format='JPG'; // JPG | PNG $thumb->jpeg_progressive=0; // set progressive JPEG : 0 = no , 1 = yes $thumb->allow_enlarge=false; // allow to enlarge the thumbnail $thumb->CalculateQFactor(10000); // Calculate JPEG quality factor for a specific size in bytes $thumb->bicubic_resample=true; // [OPTIONAL] set resample algorithm to bicubic $thumb->img_watermark='watermark.png'; // [OPTIONAL] set watermark source file, only PNG format [RECOMENDED ONLY WITH GD 2 ] $thumb->img_watermark_Valing='TOP'; // [OPTIONAL] set watermark vertical position, TOP | CENTER | BOTTOM $thumb->img_watermark_Haling='LEFT'; // [OPTIONAL] set watermark horizonatal position, LEFT | CENTER | RIGHT $thumb->txt_watermark='Watermark text'; // [OPTIONAL] set watermark text [RECOMENDED ONLY WITH GD 2 ] $thumb->txt_watermark_color='000000'; // [OPTIONAL] set watermark text color , RGB Hexadecimal[RECOMENDED ONLY WITH GD 2 ] $thumb->txt_watermark_font=1; // [OPTIONAL] set watermark text font: 1,2,3,4,5 $thumb->txt_watermark_Valing='TOP'; // [OPTIONAL] set watermark text vertical position, TOP | CENTER | BOTTOM $thumb->txt_watermark_Haling='LEFT'; // [OPTIONAL] set watermark text horizonatal position, LEFT | CENTER | RIGHT $thumb->txt_watermark_Hmargin=10; // [OPTIONAL] set watermark text horizonatal margin in pixels $thumb->txt_watermark_Vmargin=10; // [OPTIONAL] set watermark text vertical margin in pixels $thumb->->memory_limit='32M'; //[OPTIONAL] set maximun memory usage, default 32 MB ('32M'). (use '16M' or '32M' for litter images) $thumb->max_execution_time'30'; //[OPTIONAL] set maximun execution time, default 30 seconds ('30'). (use '60' for big images o slow server) $thumb->process(); // generate image $thumb->show(); // show your thumbnail, or $thumb->save("thumbnail.jpg"); // save your thumbnail to file, or $image = $thumb->dump(); // get the image echo ($thumb->error_msg); // print Error Mensage //---------------------------------------------- ################################################ */ class Thumbnail { /** *@access public *@var integer Quality factor for JPEG output format, default 75 **/ var $quality=75; /** *@access public *@var string output format, default JPG, valid values 'JPG' | 'PNG' **/ var $output_format='JPG'; /** *@access public *@var integer set JPEG output format to progressive JPEG : 0 = no , 1 = yes **/ var $jpeg_progressive=0; /** *@access public *@var boolean allow to enlarge the thumbnail. **/ var $allow_enlarge=false; /** *@access public *@var string [OPTIONAL] set watermark source file, only PNG format [RECOMENDED ONLY WITH GD 2 ] **/ var $img_watermark=''; /** *@access public *@var string [OPTIONAL] set watermark vertical position, TOP | CENTER | BOTTOM **/ var $img_watermark_Valing='TOP'; /** *@access public *@var string [OPTIONAL] set watermark horizonatal position, LEFT | CENTER | RIGHT **/ var $img_watermark_Haling='LEFT'; /** *@access public *@var string [OPTIONAL] set watermark text [RECOMENDED ONLY WITH GD 2 ] **/ var $txt_watermark=''; /** *@access public *@var string [OPTIONAL] set watermark text color , RGB Hexadecimal[RECOMENDED ONLY WITH GD 2 ] **/ var $txt_watermark_color='000000'; /** *@access public *@var integer [OPTIONAL] set watermark text font: 1,2,3,4,5 **/ var $txt_watermark_font=1; /** *@access public *@var string [OPTIONAL] set watermark text vertical position, TOP | CENTER | BOTTOM **/ var $txt_watermark_Valing='TOP'; /** *@access public *@var string [OPTIONAL] set watermark text horizonatal position, LEFT | CENTER | RIGHT **/ var $txt_watermark_Haling='LEFT'; /** *@access public *@var integer [OPTIONAL] set watermark text horizonatal margin in pixels **/ var $txt_watermark_Hmargin=10; /** *@access public *@var integer [OPTIONAL] set watermark text vertical margin in pixels **/ var $txt_watermark_Vmargin=10; /** *@access public *@var bool [OPTIONAL] set resample algorithm to bicubic **/ var $bicubic_resample=false; /** *@access public *@var string [OPTIONAL] set maximun memory usage, default 8 MB ('8M'). (use '16M' for big images) **/ var $memory_limit='32M'; /** *@access public *@var string [OPTIONAL] set maximun execution time, default 30 seconds ('30'). (use '60' for big images) **/ var $max_execution_time='30'; /** *@access public *@var string errors mensage **/ var $error_msg=''; /** *@access private *@var mixed images **/ var $img; /** *open source image *@access public *@param string filename of the source image file *@return boolean **/ function Thumbnail($imgfile) { $img_info = getimagesize( $imgfile ); //detect image format switch( $img_info[2] ){ case 2: //JPEG $this->img["format"]="JPEG"; $this->img["src"] = ImageCreateFromJPEG ($imgfile); break; case 3: //PNG $this->img["format"]="PNG"; $this->img["src"] = ImageCreateFromPNG ($imgfile); $this->img["des"] = $this->img["src"]; break; default: $this->error_msg="Not Supported File"; return false; }//case $this->img["x"] = $img_info[0]; //original dimensions $this->img["y"] = $img_info[1]; $this->img["x_thumb"]= $this->img["x"]; //thumbnail dimensions $this->img["y_thumb"]= $this->img["y"]; $this->img["des"] = $this->img["src"]; // thumbnail = original return true; } /** *set height for thumbnail *@access public *@param integer height *@return boolean **/ function size_height($size=100) { //height $this->img["y_thumb"]=$size; if ($this->allow_enlarge==true) { $this->img["y_thumb"]=$size; } else { if ($size < ($this->img["y"])) { $this->img["y_thumb"]=$size; } else { $this->img["y_thumb"]=$this->img["y"]; } } if ($this->img["y"]>0) { $this->img["x_thumb"] = ($this->img["y_thumb"]/$this->img["y"])*$this->img["x"]; } else { $this->error_msg="Invalid size : Y"; return false; } } /** *set width for thumbnail *@access public *@param integer width *@return boolean **/ function size_width($size=100) { //width if ($this->allow_enlarge==true) { $this->img["x_thumb"]=$size; } else { if ( $size < ($this->img["x"])) { $this->img["x_thumb"]=$size; } else { $this->img["x_thumb"]=$this->img["x"]; } } if ($this->img["x"]>0) { $this->img["y_thumb"] = ($this->img["x_thumb"]/$this->img["x"])*$this->img["y"]; } else { $this->error_msg="Invalid size : x"; return false; } } /** *set the biggest width or height for thumbnail *@access public *@param integer width or height *@return boolean **/ function size_auto($size=100) { //size if ($this->img["x"]>=$this->img["y"]) { $this->size_width($size); } else { $this->size_height($size); } } /** *set the biggest width and height for thumbnail *@access public *@param integer width *@param integer height *@return boolean **/ function size($size_x,$size_y) { //size if ( (($this->img["x"])/$size_x) >= (($this->img["y"])/$size_y) ) { $this->size_width($size_x); } else { $this->size_height($size_y); } } /** *show your thumbnail, output image and headers *@access public *@return void **/ function show() { //show thumb Header("Content-Type: image/".$this->img["format"]); if ($this->output_format=="PNG") { //PNG imagePNG($this->img["des"]); } else { imageinterlace( $this->img["des"], $this->jpeg_progressive); imageJPEG($this->img["des"],"",$this->quality); } } /** *return the result thumbnail *@access public *@return mixed **/ function dump() { //dump thumb return $this->img["des"]; } /** *save your thumbnail to file *@access public *@param string output file name *@return boolean **/ function save($save="") { //save thumb if (empty($save)) { $this->error_msg='Not Save File'; return false; } if ($this->output_format=="PNG") { //PNG imagePNG($this->img["des"],"$save"); } else { imageinterlace( $this->img["des"], $this->jpeg_progressive); imageJPEG($this->img["des"],"$save",$this->quality); } return true; } /** *generate image *@access public *@return boolean **/ function process () { ini_set('memory_limit',$this->memory_limit); ini_set('max_execution_time',$this->max_execution_time); $X_des =$this->img["x_thumb"]; $Y_des =$this->img["y_thumb"]; //if ($this->checkgd2()) { $gd_version=$this->gdVersion(); if ($gd_version>=2) { //if (false) { $this->img["des"] = ImageCreateTrueColor($X_des,$Y_des); if ($this->txt_watermark!='' ) { sscanf($this->txt_watermark_color, "%2x%2x%2x", $red, $green, $blue); $txt_color=imageColorAllocate($this->img["des"] ,$red, $green, $blue); } if (!$this->bicubic_resample) { imagecopyresampled ($this->img["des"], $this->img["src"], 0, 0, 0, 0, $X_des, $Y_des, $this->img["x"], $this->img["y"]); } else { $this->imageCopyResampleBicubic($this->img["des"], $this->img["src"], 0, 0, 0, 0, $X_des, $Y_des, $this->img["x"], $this->img["y"]); } if ($this->img_watermark!='' && file_exists($this->img_watermark)) { $this->img["watermark"]=ImageCreateFromPNG ($this->img_watermark); $this->img["x_watermark"] =imagesx($this->img["watermark"]); $this->img["y_watermark"] =imagesy($this->img["watermark"]); imagecopyresampled ($this->img["des"], $this->img["watermark"], $this->calc_position_H (), $this->calc_position_V (), 0, 0, $this->img["x_watermark"], $this->img["y_watermark"],$this->img["x_watermark"], $this->img["y_watermark"]); } if ($this->txt_watermark!='' ) { imagestring ( $this->img["des"], $this->txt_watermark_font, $this->calc_text_position_H() , $this->calc_text_position_V(), $this->txt_watermark,$txt_color); } } else { $this->img["des"] = ImageCreate($X_des,$Y_des); if ($this->txt_watermark!='' ) { sscanf($this->txt_watermark_color, "%2x%2x%2x", $red, $green, $blue); $txt_color=imageColorAllocate($this->img["des"] ,$red, $green, $blue); } // pre copy image, allocating color of water mark, GD < 2 can't resample colors if ($this->img_watermark!='' && file_exists($this->img_watermark)) { $this->img["watermark"]=ImageCreateFromPNG ($this->img_watermark); $this->img["x_watermark"] =imagesx($this->img["watermark"]); $this->img["y_watermark"] =imagesy($this->img["watermark"]); imagecopy ($this->img["des"], $this->img["watermark"], $this->calc_position_H (), $this->calc_position_V (), 0, 0, $this->img["x_watermark"], $this->img["y_watermark"]); } imagecopyresized ($this->img["des"], $this->img["src"], 0, 0, 0, 0, $X_des, $Y_des, $this->img["x"], $this->img["y"]); @imagecopy ($this->img["des"], $this->img["watermark"], $this->calc_position_H (), $this->calc_position_V (), 0, 0, $this->img["x_watermark"], $this->img["y_watermark"]); if ($this->txt_watermark!='' ) { imagestring ( $this->img["des"], $this->txt_watermark_font, $this->calc_text_position_H() , $this->calc_text_position_V(), $this->txt_watermark, $txt_color); // $this->txt_watermark_color); } } $this->img["src"]=$this->img["des"]; $this->img["x"]= $this->img["x_thumb"]; $this->img["y"]= $this->img["y_thumb"]; } /** *Calculate JPEG quality factor for a specific size in bytes *@access public *@param integer maximun file size in bytes **/ function CalculateQFactor($size) { //based on: JPEGReducer class version 1, 25 November 2004, Author: huda m elmatsani, Email :justhuda@netscape.net //calculate size of each image. 75%, 50%, and 25% quality ob_start(); imagejpeg($this->img["des"],'',75); $buffer = ob_get_contents(); ob_end_clean(); $size75 = strlen($buffer); ob_start(); imagejpeg($this->img["des"],'',50); $buffer = ob_get_contents(); ob_end_clean(); $size50 = strlen($buffer); ob_start(); imagejpeg($this->img["des"],'',25); $buffer = ob_get_contents(); ob_end_clean(); $size25 = strlen($buffer); //calculate gradient of size reduction by quality $mgrad1 = 25/($size50-$size25); $mgrad2 = 25/($size75-$size50); $mgrad3 = 50/($size75-$size25); $mgrad = ($mgrad1+$mgrad2+$mgrad3)/3; //result of approx. quality factor for expected size $q_factor=round($mgrad*($size-$size50)+50); if ($q_factor<25) { $this->quality=25; } elseif ($q_factor>100) { $this->quality=100; } else { $this->quality=$q_factor; } } /** *@access private *@return integer **/ function calc_text_position_H () { $W_mark = imagefontwidth ($this->txt_watermark_font)*strlen($this->txt_watermark); $W = $this->img["x_thumb"]; switch ($this->txt_watermark_Haling) { case 'CENTER': $x = $W/2-$W_mark/2; break; case 'RIGHT': $x = $W-$W_mark-($this->txt_watermark_Hmargin); break; default: case 'LEFT': $x = 0+($this->txt_watermark_Hmargin); break; } return $x; } /** *@access private *@return integer **/ function calc_text_position_V () { $H_mark = imagefontheight ($this->txt_watermark_font); $H = $this->img["y_thumb"]; switch ($this->txt_watermark_Valing) { case 'CENTER': $y = $H/2-$H_mark/2; break; case 'BOTTOM': $y = $H-$H_mark-($this->txt_watermark_Vmargin); break; default: case 'TOP': $y = 0+($this->txt_watermark_Vmargin); break; } return $y; } /** *@access private *@return integer **/ function calc_position_H () { $W_mark = $this->img["x_watermark"]; $W = $this->img["x_thumb"]; switch ($this->img_watermark_Haling) { case 'CENTER': $x = $W/2-$W_mark/2; break; case 'RIGHT': $x = $W-$W_mark; break; default: case 'LEFT': $x = 0; break; } return $x; } /** *@access private *@return integer **/ function calc_position_V () { $H_mark = $this->img["y_watermark"]; $H = $this->img["y_thumb"]; switch ($this->img_watermark_Valing) { case 'CENTER': $y = $H/2-$H_mark/2; break; case 'BOTTOM': $y = $H-$H_mark; break; default: case 'TOP': $y = 0; break; } return $y; } /** *@access private *@return boolean **/ function checkgd2(){ // TEST the GD version if (extension_loaded('gd2') && function_exists('imagecreatetruecolor')) { return false; } else { return true; } } /** * Get which version of GD is installed, if any. * * Returns the version (1 or 2) of the GD extension. */ function gdVersion($user_ver = 0) { if (! extension_loaded('gd')) { return; } static $gd_ver = 0; // Just accept the specified setting if it's 1. if ($user_ver == 1) { $gd_ver = 1; return 1; } // Use the static variable if function was called previously. if ($user_ver !=2 && $gd_ver > 0 ) { return $gd_ver; } // Use the gd_info() function if possible. if (function_exists('gd_info')) { $ver_info = gd_info(); preg_match('/\d/', $ver_info['GD Version'], $match); $gd_ver = $match[0]; return $match[0]; } // If phpinfo() is disabled use a specified / fail-safe choice... if (preg_match('/phpinfo/', ini_get('disable_functions'))) { if ($user_ver == 2) { $gd_ver = 2; return 2; } else { $gd_ver = 1; return 1; } } // ...otherwise use phpinfo(). ob_start(); phpinfo(8); $info = ob_get_contents(); ob_end_clean(); $info = stristr($info, 'gd version'); preg_match('/\d/', $info, $match); $gd_ver = $match[0]; return $match[0]; } // End gdVersion() function imageCopyResampleBicubic($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) { $scaleX = ($src_w - 1) / $dst_w; $scaleY = ($src_h - 1) / $dst_h; $scaleX2 = $scaleX / 2.0; $scaleY2 = $scaleY / 2.0; $tc = imageistruecolor($src_img); for ($y = $src_y; $y < $src_y + $dst_h; $y++) { $sY = $y * $scaleY; $siY = (int) $sY; $siY2 = (int) $sY + $scaleY2; for ($x = $src_x; $x < $src_x + $dst_w; $x++) { $sX = $x * $scaleX; $siX = (int) $sX; $siX2 = (int) $sX + $scaleX2; if ($tc) { $c1 = imagecolorat($src_img, $siX, $siY2); $c2 = imagecolorat($src_img, $siX, $siY); $c3 = imagecolorat($src_img, $siX2, $siY2); $c4 = imagecolorat($src_img, $siX2, $siY); $r = (($c1 + $c2 + $c3 + $c4) >> 2) & 0xFF0000; $g = ((($c1 & 0xFF00) + ($c2 & 0xFF00) + ($c3 & 0xFF00) + ($c4 & 0xFF00)) >> 2) & 0xFF00; $b = ((($c1 & 0xFF) + ($c2 & 0xFF) + ($c3 & 0xFF) + ($c4 & 0xFF)) >> 2); imagesetpixel($dst_img, $dst_x + $x - $src_x, $dst_y + $y - $src_y, $r+$g+$b); } else { $c1 = imagecolorsforindex($src_img, imagecolorat($src_img, $siX, $siY2)); $c2 = imagecolorsforindex($src_img, imagecolorat($src_img, $siX, $siY)); $c3 = imagecolorsforindex($src_img, imagecolorat($src_img, $siX2, $siY2)); $c4 = imagecolorsforindex($src_img, imagecolorat($src_img, $siX2, $siY)); $r = ($c1['red'] + $c2['red'] + $c3['red'] + $c4['red'] ) << 14; $g = ($c1['green'] + $c2['green'] + $c3['green'] + $c4['green']) << 6; $b = ($c1['blue'] + $c2['blue'] + $c3['blue'] + $c4['blue'] ) >> 2; imagesetpixel($dst_img, $dst_x + $x - $src_x, $dst_y + $y - $src_y, $r+$g+$b); } } } } /** *generate a unique filename in a directory like prefix_filename_randon.ext *@access public *@param string path of the destination dir. Example '/img' *@param string name of the file to save. Example 'my_foto.jpg' *@param string [optional] prefix of the name Example 'picture' *@return string full path of the file to save. Exmaple '/img/picture_my_foto_94949.jpg' **/ function unique_filename ( $archive_dir , $filename , $file_prefix='') { // checkemaos if file exists $extension= strtolower( substr( strrchr($filename, ".") ,1) ); $name=str_replace(".".$extension,'',$filename); // only alfanumerics characters $string_tmp = $name; $name=''; while ($string_tmp!='') { $character=substr ($string_tmp, 0, 1); $string_tmp=substr ($string_tmp, 1); if (eregi("[abcdefghijklmnopqrstuvwxyz0-9]", $character)) { $name=$name.$character; } else { $name=$name.'_'; } } $destination = $file_prefix."_".$name.".".$extension; while (file_exists($archive_dir."/".$destination)) { // if exist, add a random number to the file name srand((double)microtime()*1000000); // random number inizializzation $destination = $file_prefix."_".$name."_".rand(0,999999999).".".$extension; } return ($destination); } /** * NOT USED : to do: mezclar imagenes a tamaņo original, preservar canal alpha y redimensionar * Merge multiple images and keep transparency * $i is and array of the images to be merged: * $i[1] will be overlayed over $i[0] * $i[2] will be overlayed over that * @param mixed * @retrun mixed the function returns the resulting image ready for saving **/ function imagemergealpha($i) { //create a new image $s = imagecreatetruecolor(imagesx($i[0]),imagesy($i[1])); //merge all images imagealphablending($s,true); $z = $i; while($d = each($z)) { imagecopy($s,$d[1],0,0,0,0,imagesx($d[1]),imagesy($d[1])); } //restore the transparency imagealphablending($s,false); $w = imagesx($s); $h = imagesy($s); for($x=0;$x<$w;$x++) { for($y=0;$y<$h;$y++) { $c = imagecolorat($s,$x,$y); $c = imagecolorsforindex($s,$c); $z = $i; $t = 0; while($d = each($z)) { $ta = imagecolorat($d[1],$x,$y); $ta = imagecolorsforindex($d[1],$ta); $t += 127-$ta['alpha']; } $t = ($t > 127) ? 127 : $t; $t = 127-$t; $c = imagecolorallocatealpha($s,$c['red'],$c['green'],$c['blue'],$t); imagesetpixel($s,$x,$y,$c); } } imagesavealpha($s,true); return $s; } } ?> Sge - Società Gestioni Elettriche



IMPIANTO FOTOVOLTAICO
Che cos'è un impianto fotovoltaico

L’impianto fotovoltaico è un impianto per la produzione di energia elettrica mediante conversione diretta della radiazione solare, tramite l'effetto fotovoltaico.

Detto così sembra molto più comlicato di quello che in realtà è.

L'impianto sfrutta l'energia solare e la trasforma in energia elettrica e per farlo si avvale dell'uso dei moduli o pannelli fotovoltaici, che fissati al tetto tramite una struttura adeguata, catturano l'energia del sole e la trasformano in energia elettrica, e dall'inverter che come dice il nome stesso converte la corrente continua prodotta dai pannelli in corrente alternata.

 
Sge srl - Autoporto di Fernetti - 34016 Monruino (TS) - info@sgesrl.eu - P.iva / Cod. Fisc e Nr. Iscrizione Registro Imprese C.C.I.A.A. TS 01164600320                                                                                                     Società Certificata SOA OG9 II cat.    
 
 
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