add LE_IMG class and documentation
This commit is contained in:
Pavel Belyaev
248
CLASSES/core/LE_IMG.php
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248
CLASSES/core/LE_IMG.php
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<?php
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/**
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* Author: Pavel Belyaev
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* GitHub: https://github.com/TechResearchRu/LE_DRAFT
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* Email: pavelbbb@gmail.com
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* LE FRAMEWORK, LE_IMG v0.1 2021, need GD module in PHP
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*/
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class LE_IMG
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{
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public static function LOAD($p)
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{
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if (!file_exists($p) || !is_file($p)) return false;
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list($w,$h,$t) = getimagesize($p);
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switch ($t)
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{
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case 1:$obj = imagecreatefromgif($p);break;
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case 2:$obj = imagecreatefromjpeg($p);break;
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case 3:$obj = imagecreatefrompng($p);break;
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default: return false; break;
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}
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return [$w,$h,$t,&$obj];
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}
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public static function SAVE (&$o,$t,$p)
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{
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switch ( $t )
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{
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case 1: imagegif($o,$p); break;
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case 2: imagejpeg($o,$p); break;
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case 3: imagepng($o,$p); break;
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}
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imageDestroy($o);
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unset($o);
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return ;
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}
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//list($_w,$_h) =LE_IMG::calc_prop($w,$h,$w_out,$h_out,$maximize)
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public static function calc_prop($w,$h,$w_out,$h_out,$max=0)
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{
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$r = $h/$w; //отношение высоты к ширине
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if ($max && ($w<$w_out||$h<$h_out))
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{
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if (($w_out>0) && ($w<$w_out) && ($w=$w_out)) $h = Ceil($w*$r);
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if (($h_out>0) && ($h<$h_out) && ($h=$h_out)) $w = Ceil($h*pow($r,-1));
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}
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//если ширина не вписалась, уменьшаем ширину, а высоту пропорционально
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if (($w_out>0) && ($w>$w_out))
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{
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$w=$w_out;
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$h = Ceil($w*$r);
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}
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//если высота не вписалась, уменьшаем высоту, а ширину пропорционально
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if (($h_out>0) && ($h>$h_out))
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{
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$h=$h_out;
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$w = Ceil($h*pow($r,-1));
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}
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return [$w,$h]; //x,y
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}
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public static function calc_prop2($w,$h,$w_out,$h_out)
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{
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$_w = $w/$w_out;
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$_h = $h/$h_out;
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$r = $h/$w;
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if($_w<$_h)
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{
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$w = $w_out;
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$h = Ceil($w*$r);
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}
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else
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{
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$h=$h_out;
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$w = Ceil($h*pow($r,-1));
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}
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return [$w,$h];
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}
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//LE_IMG::resize ($in,$out,$mw=0,$mh=0);
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public static function resize ($in,$out,$mw=0,$mh=0)
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{
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if (!file_exists($in)) return false;
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$__load = LE_IMG::load($in);
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if ($__load===false) return false;
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list($w,$h,$t,$obj) = $__load;
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$nw=$w; $nh=$h;
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if (($mw>0) && ($w>$mw) && ($nw=$mw)) $nh = Ceil($nw*$h/$w);
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if (($mh>0) && ($nh>$mh) && ($nh=$mh)) $nw = Ceil($nh*$w/$h);
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$resource = imagecreatetruecolor ($nw,$nh); //создаем лист по новым размерам
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imagealphablending($resource, false);
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imagecopyresampled ($resource,$obj,0,0,0,0,$nw,$nh,$w,$h);
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imageSaveAlpha($resource, true);
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LE_IMG::save($resource,$t,$out);
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return true;
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}
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public static function resize_crop ($in,$out,$mw=0,$mh=0)
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{
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if (!file_exists($in)) return false;
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$__load = LE_IMG::load($in);
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if ($__load===false) return false;
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list($w,$h,$t,$obj) = $__load;
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list($nw,$nh) = LE_IMG::calc_prop2($w,$h,$mw,$mh);
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//resize
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$resource = imagecreatetruecolor ($nw,$nh); //создаем лист по новым размерам
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imagealphablending($resource, false);
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imagecopyresampled ($resource,$obj,0,0,0,0,$nw,$nh,$w,$h);
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imageSaveAlpha($resource, true);
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//crop
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$cr = array('width'=>$mw,'height'=>$mh);
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$cr['x'] = Ceil(($nw-$mw)/2);
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$cr['y'] = Ceil(($nh-$mh)/2);
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$resource = imagecrop($resource,$cr);
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LE_IMG::save($resource,$t,$out);
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return ;
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}
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//срезка кусочков изображения со всех сторон
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public static function crop ($in,$out,$l=0,$t=0,$r=0,$b=0)
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{
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/*открытие*/
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list($w,$h,$t,$obj) = LE_IMG::load($in);
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/*новые размеры*/
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$n_w=$w-$l-$r; $n_h=$h-$t-$b;
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$res = imagecreatetruecolor($n_w,$n_h);
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imagealphablending($res,false);
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imagecopy ($res,$obj,0,0,$l,$t,$n_w,$n_h);
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imageSaveAlpha($res, true);
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LE_IMG::save($res,$t,$out);
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}
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public static function fix_color($w,$h,&$img)
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{
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//fix for png not truecolor
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$uig = imagecreatetruecolor($w, $h);
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imageSaveAlpha($uig, true);
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//$transparent = imagecolortransparent ($img);
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$transparent = imagecolorallocatealpha($uig,255,255,255,127);
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imagefill($uig, 0, 0, $transparent);
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imagecopy($uig, $img, 0, 0, 0, 0, $w, $h);
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return $uig;
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}
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public static function watermark1($url,$conf)
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{
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//return LE_IMG::demo_water($url,$conf);
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if (!is_file($url)) exit('Нет файла для наложения watermark');
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$__load = LE_IMG::load($url);
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if ($__load===false) return false;
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list($w,$h,$t,$src_img) = $__load;
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//fix for png not truecolor
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if (imageistruecolor($src_img)===false)
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{
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$uig = LE_IMG::fix_color($w,$h,$src_img);
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imagedestroy($src_img);
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}
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else
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$uig = &$src_img;
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$txt_w = $w*0.9; $txt_h = $h*0.9;
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if (!isset($conf['rgb'])) $conf['rgb'] = '78,78,78,40';
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$col = explode(',',$conf['rgb']);
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$text = " ".$conf['text']." ";
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$angle = -rad2deg(atan2((-$h),($w)));
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$color = imagecolorclosestalpha ($uig, $col[0], $col[1], $col[2], $col[3]);
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$size = (($txt_w+$txt_h)/2)*2/mb_strlen(" ".$text." ");
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$fnt = $conf['font'];
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$box = imagettfbbox ( $size, $angle, $fnt, $text);
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$pad_left = ($txt_w/2 - abs($box[4] - $box[0])/2);
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$pad_top = ($txt_h/2 + abs($box[5] - $box[1])/2);
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imagettftext($uig,$size ,$angle, $pad_left,$pad_top , $color, $fnt, $text);
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LE_IMG::save($uig,$t,$url);
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return;
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}
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public static function watermark2($url,$stamp_path,$skeep_err=1)
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{
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if (!is_file($url))
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{
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if ($skeep_err) return false;
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exit('Нет файла для наложения watermark');
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}
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$__load = LE_IMG::load($url);
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if ($__load===false) return false;
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list($w,$h,$t,$src_img) = $__load;
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//fix for png not truecolor
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if (imageistruecolor($src_img)===false)
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{
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$uig = LE_IMG::fix_color($w,$h,$src_img);
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imagedestroy($src_img);
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}
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else
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$uig = &$src_img;
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$_stamp = LE_IMG::load($stamp_path);
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if ($_stamp===false) return false;
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list($st_w,$st_h,$st_t,$stamp) = $_stamp;
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list($_w,$_h) = LE_IMG::calc_prop($st_w,$st_h,$w,$h,1);
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$dst_x = $dst_y =0;
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if ($_w<$w) $dst_x = ceil(($w-$_w)/2);
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if ($_h<$h) $dst_y = ceil(($h-$_h)/2);
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imagecopyresampled ($uig,$stamp,$dst_x, $dst_y,0,0,$_w,$_h,$st_w,$st_h);
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LE_IMG::save($uig,$t,$url);
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imagedestroy($stamp);
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return;
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}
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}
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