codice:
<?php
define('PAD_2SIDES',1);
define('PAD_1SIDE',2);
define('PAD_NONE',3);
// define('BICUBIC_RESAMPLE',1);
function save_thumbnail($image,$size,$save_path,$save_name,$config=array()) {
$myreturn=false;
$size=array($size,$size);
if (empty($config['padding_type'])) {
$config['padding_type']=PAD_1SIDE;
}
if (empty($config['quality'])) {
$config['quality']=90;
}
if ($imginfo=getimagesize($image)) {
$orig_size=array($imginfo[0],$imginfo[1]);
if ($orig_size[0]/$size[0]<$orig_size[1]/$size[1]) {
$relevant_length=1;
} else {
$relevant_length=0;
}
if ($imginfo[2]==IMAGETYPE_GIF && function_exists('imagecreatefromgif')) { //gif
$myimg=@imagecreatefromgif($image);
} elseif ($imginfo[2]==IMAGETYPE_JPEG && function_exists('imagecreatefromjpeg')) { //jpg
ob_start();
$myimg=@imagecreatefromjpeg($image);
ob_end_flush();
} elseif ($imginfo[2]==IMAGETYPE_PNG && function_exists('imagecreatefrompng')) { //png
$myimg=@imagecreatefrompng($image);
}
if (!empty($myimg)) {
$new_size=array();
$mynewimg='';
if ($orig_size[$relevant_length]>$size[$relevant_length]) { // scale down
$new_size[$relevant_length]=$size[$relevant_length];
$new_size[1-$relevant_length]=(int)($orig_size[1-$relevant_length]*($size[$relevant_length]/$orig_size[$relevant_length]));
if ($config['padding_type']==PAD_1SIDE || $config['padding_type']==PAD_2SIDES) {
// $size=$size; // this is actually just PAD_1SIDE and the photo will be square
} else {
// $size=$new_size; // no padding here, photo has original proportions
}
} else { // picture is smaller than the needed size
$new_size=$orig_size;
if ($config['padding_type']==PAD_2SIDES) { //pad in both directions. square and big
$size=array($size,$size);
} elseif ($config['padding_type']==PAD_1SIDE) { // padding in one direction only. square but smaller
$size=$orig_size[$relevant_length];
$size=array($size,$size);
} else { // no padding. original proportions
$size=$orig_size;
}
}
$mynewimg=@imagecreatetruecolor($size[0],$size[1]);
imagefilledrectangle($mynewimg,0,0,$size[0],$size[1],0xFFFFFF);
$x=(int)(($size[0]-$new_size[0])/2);
$y=(int)(($size[1]-$new_size[1])/2);
if (defined('BICUBIC_RESAMPLE')) {
imagecopyresamplebicubic($mynewimg,$myimg,$x,$y,0,0,$new_size[0],$new_size[1],$orig_size[0],$orig_size[1]);
} else {
fastimagecopyresampled($mynewimg,$myimg,$x,$y,0,0,$new_size[0],$new_size[1],$orig_size[0],$orig_size[1]);
}
if (!empty($config['watermark_text']) && function_exists('imagettftext')) {
$config['watermark_text_color']=str_pad($config['watermark_text_color'],6,'0',STR_PAD_RIGHT);
$text_color=imagecolorallocate($mynewimg,hexdec(substr($config['watermark_text_color'],0,2)),hexdec(substr($config['watermark_text_color'],2,2)),hexdec(substr($config['watermark_text_color'],4,2)));
$text_color2=imagecolorallocate($mynewimg,255-hexdec(substr($config['watermark_text_color'],0,2)),255-hexdec(substr($config['watermark_text_color'],2,2)),255-hexdec(substr($config['watermark_text_color'],4,2)));
$font_size=15;
do {
--$font_size;
$text_box=imagettfbbox($font_size,0,_BASEPATH_.'/includes/fonts/arial.ttf',$config['watermark_text']);
$textlen=$text_box[2]-$text_box[0]+5;
} while ($textlen>$new_size[0]);
$watermark_x=(int)(($size[0]-$new_size[0])/2)+5;
$watermark_y=$new_size[1]+(int)(($size[1]-$new_size[1])/2)-20;
//shadow first
imagettftext($mynewimg,$font_size,0,$watermark_x,$watermark_y,$text_color2,_BASEPATH_.'/includes/fonts/arial.ttf',$config['watermark_text']);
//text second
imagettftext($mynewimg,$font_size,0,$watermark_x+1,$watermark_y+1,$text_color,_BASEPATH_.'/includes/fonts/arial.ttf',$config['watermark_text']);
}
if (!empty($config['watermark_image']) && is_file($config['watermark_image'])) {
$wm_image=@imagecreatefrompng($config['watermark_image']);
$wm_image_width=imagesx($wm_image);
$wm_image_height=imagesy($wm_image);
$wm_image_x=(int)(($size[0]-$new_size[0])/2)+5;
$wm_image_y=$new_size[1]+(int)(($size[1]-$new_size[1])/2)-$wm_image_height;
if (defined('BICUBIC_RESAMPLE')) {
imagecopyresamplebicubic($mynewimg,$wm_image,$wm_image_x,$wm_image_y,0,0,$wm_image_width,$wm_image_height,$wm_image_width,$wm_image_height);
} else {
fastimagecopyresampled($mynewimg,$wm_image,$wm_image_x,$wm_image_y,0,0,$wm_image_width,$wm_image_height,$wm_image_width,$wm_image_height);
}
}
if (!empty($config['round_corners'])) {
$skin=get_my_skin();
imagealphablending($mynewimg,true);
// put the corners
$corner=@imagecreatefrompng(_BASEPATH_.'/skins_site/'.$skin.'/images/corner_tl.png');
imagecopy($mynewimg,$corner,0,0,0,0,7,7);
$corner=@imagecreatefrompng(_BASEPATH_.'/skins_site/'.$skin.'/images/corner_tr.png');
imagecopy($mynewimg,$corner,$size[0]-7,0,0,0,7,7);
$corner=@imagecreatefrompng(_BASEPATH_.'/skins_site/'.$skin.'/images/corner_bl.png');
imagecopy($mynewimg,$corner,0,$size[1]-7,0,0,7,7);
$corner=@imagecreatefrompng(_BASEPATH_.'/skins_site/'.$skin.'/images/corner_br.png');
imagecopy($mynewimg,$corner,$size[0]-7,$size[1]-7,0,0,7,7);
// draw the border lines
$border_color=imagecolorallocate($mynewimg,0xCC,0xCC,0xCC);
imageline($mynewimg,7,0,$size[0]-8,0,$border_color); //tl->tr
imageline($mynewimg,$size[0]-1,7,$size[0]-1,$size[1]-8,$border_color); //tr->br
imageline($mynewimg,7,$size[1]-1,$size[0]-8,$size[1]-1,$border_color); //bl->br
imageline($mynewimg,0,7,0,$size[1]-8,$border_color); //tl->bl
}
$myreturn=imagejpeg($mynewimg,$save_path.'/'.$save_name.'.jpg',$config['quality']);
} else {
$myreturn=false;
}
} else {
$myreturn=false;
}
if (!empty($myimg)) {
imagedestroy($myimg);
}
if (!empty($mynewimg)) {
imagedestroy($mynewimg);
}
return $myreturn;
}
function imagecopyresamplebicubic($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+$b);
}
}
}
}
function fastimagecopyresampled(&$dst_image, $src_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h, $quality = 3) {
// Plug-and-Play fastimagecopyresampled function replaces much slower imagecopyresampled.
// Just include this function and change all "imagecopyresampled" references to "fastimagecopyresampled".
// Typically from 30 to 60 times faster when reducing high resolution images down to thumbnail size using the default quality setting.
// Author: Tim Eckel - Date: 09/07/07 - Version: 1.1 - Project: FreeRingers.net - Freely distributable - These comments must remain.
//
// Optional "quality" parameter (defaults is 3). Fractional values are allowed, for example 1.5. Must be greater than zero.
// Between 0 and 1 = Fast, but mosaic results, closer to 0 increases the mosaic effect.
// 1 = Up to 350 times faster. Poor results, looks very similar to imagecopyresized.
// 2 = Up to 95 times faster. Images appear a little sharp, some prefer this over a quality of 3.
// 3 = Up to 60 times faster. Will give high quality smooth results very close to imagecopyresampled, just faster.
// 4 = Up to 25 times faster. Almost identical to imagecopyresampled for most images.
// 5 = No speedup. Just uses imagecopyresampled, no advantage over imagecopyresampled.
if (empty($src_image) || empty($dst_image) || $quality <= 0) {
return false;
}
if ($quality<5 && (($dst_w*$quality)<$src_w || ($dst_h*$quality)<$src_h)) {
$temp=imagecreatetruecolor($dst_w*$quality+1,$dst_h*$quality+1);
imagecopyresized($temp, $src_image, 0, 0, $src_x, $src_y, $dst_w * $quality + 1, $dst_h * $quality + 1, $src_w, $src_h);
imagecopyresampled($dst_image, $temp, $dst_x, $dst_y, 0, 0, $dst_w, $dst_h, $dst_w * $quality, $dst_h * $quality);
imagedestroy($temp);
} else {
imagecopyresampled($dst_image, $src_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
}
return true;
}
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