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|
<?php
/**
* @author Thomas Rambaud
* @copyright 2009
* @version 1.3
*/
class thumbs_builder {
protected $_source,
$_background_src,
$_thumbs_quality,
$_save_directory,
$_border,
$_text,
$_icon,
$_current_thumb,
$_allowed_position;
public function __construct($source_src, $save_directory, $thumbs_quality = 100){
$this->set_source_src($source_src);
$this->set_save_directory($save_directory);
$this->set_thumbs_quality($thumbs_quality);
$this->_allowed_position = array('top','bottom','left','right','center');
}
//-----------
// PROPERTIES
//-----------
// Getters
public function get_source_path(){
return $this->_source['src'];
}
public function get_source_width(){
return $this->_source['sizes'][0];
}
public function get_source_height(){
return $this->_source['sizes'][1];
}
public function get_save_directory(){
return $this->_save_directory;
}
public function get_current_thumb(){
return $this->_current_thumb['img'];
}
public function get_current_thumb_width(){
return $this->_current_thumb['sizes'][0];
}
public function get_current_thumb_height(){
return $this->_current_thumb['sizes'][1];
}
public static function get_random_string($chars_count = 4){
$caracteres = "123AaBbCcDdEe456fGgHhIiJjKkLlMmNn789PQqRrSsTtUuVvWwXxYyZz0";
$chaine = '';
srand(time());
for ($i=0;$i<$chars_count;$i++){
$chaine.=substr($caracteres, rand()%(strlen($caracteres)), 1);
}
return $chaine;
}
public static function get_image_extension($fn_or_path){
return strtolower(substr($fn_or_path, strrpos($fn_or_path, '.') + 1));
}
public static function get_rgb_from_hexa($hex){
if($hex[0] == '#') $hex = substr($hex,1);
$nb_cars = strlen($hex);
if($nb_cars == 6) list($r, $g, $b) = array($hex[0].$hex[1], $hex[2].$hex[3], $hex[4].$hex[5]);
elseif($nb_cars == 3) list($r, $g, $b) = array($hex[0].$hex[0], $hex[1].$hex[1], $hex[2].$hex[2]);
else return false;
$r = hexdec($r); $g = hexdec($g); $b = hexdec($b);
return array($r, $g, $b);
}
// Setters
public function set_source_src($source_src){
if(file_exists($source_src)){
$this->_source['src'] = $source_src;
$this->_source['sizes'] = getimagesize($source_src);
$this->_source['img'] = $this->build_image_from_path($source_src, $this->_source['sizes'][2]);
$this->_current_thumb =& $this->_source;
}
else{
die('L\'image source définie n\'existe pas : <span style="color:red">'.$source_src.'</span>');
}
}
public function set_save_directory($save_directory){
if(is_dir($save_directory))
$this->_save_directory = $save_directory;
else
die('Le dossier d\'enregistrement des miniatures n\'existe pas : <span style="color:red">'.$save_directory.'</span>');
}
public function set_thumbs_quality($quality){
$this->_thumbs_quality = ($quality >= 0 && $quality <= 100) ? $quality : 100;
}
public function set_icon($icon_src, $position_top, $position_left, $alpha=null){
if(file_exists($icon_src)){
$this->_icon['src'] = $icon_src;
$this->_icon['sizes'] = getimagesize($icon_src);
$this->_icon['img'] = $this->build_image_from_path($icon_src, $this->_icon['sizes']);
$this->set_icon_position($position_top, $position_left);
if($alpha != null) $this->set_icon_alpha($alpha);
}
else{
die('Le fichier image de l\'icône est inexistant ou n\'est pas un fichier : <span style="color:red">'.$icon_src.'</span>');
}
}
public function set_icon_alpha(int $alpha){
$this->_icon['alpha'] = $alpha;
}
public function set_icon_position($position_top, $position_left){
$this->_icon['position_top'] = $position_top;
$this->_icon['position_left'] = $position_left;
}
public function set_icon_autoresize(bool $bool){
$this->_icon['autoresize'] = $bool;
}
public function set_text($text, $position_top, $position_left, $hex_color, $size = 20){
$this->_text['text'] = $text;
$this->_text['position_top'] = $position_top;
$this->_text['position_left'] = $position_left;
$this->set_text_size($size);
$this->set_text_font(3);
$this->set_text_color($hex_color);
$this->reload_text_sizes();
}
public function set_text_color($hex){
$this->_text['color'] = self::get_rgb_from_hexa($hex);
}
public function set_text_font($font){
$this->_text['font'] = $font;
$this->reload_text_sizes();
}
public function set_text_size($size){
$this->_text['size'] = $size;
$this->reload_text_sizes();
}
public function set_text_autoresize(bool $bool){
$this->_text['autoresize'] = $bool;
}
public function set_text_shadow(bool $bool){
$this->_text['shadow'] = $bool;
}
public function remove_icon(){
$this->_icon = null;
}
public function remove_text(){
$this->_text = null;
}
// ----------------
// PUBLIC FUNCTIONS
// ----------------
public function resize($thumb_width, $thumb_height, $background_color, $filename = null){
$this->clear_current_thumb();
$this->_current_thumb['img'] = $this->create_image($thumb_width, $thumb_height);
$this->_current_thumb['sizes'][0] = $thumb_width;
$this->_current_thumb['sizes'][1] = $thumb_height;
$color = self::get_rgb_from_hexa($background_color);
$color = imagecolorallocate($this->_current_thumb['img'],$color[0],$color[1],$color[2]);
imagefill($this->_current_thumb['img'], 0, 0 , $color);
$ratio_source = $this->_source['sizes'][0] / $this->_source['sizes'][1];
$ratio_x = $this->_source['sizes'][0] / $thumb_width;
$ratio_y = $this->_source['sizes'][1] / $thumb_height;
$margin_left = 0;
$margin_top = 0;
if ($ratio_x > $ratio_y){
$img_width = $thumb_width;
$img_height = $thumb_width / $ratio_source;
$margin_top = $thumb_height / 2 - $img_height / 2;
}
elseif($ratio_x < $ratio_y){
$img_height = $thumb_height;
$img_width = $thumb_height * $ratio_source;
$margin_left = $thumb_width / 2 - $img_width / 2;
}
else{
$img_width = $thumb_width;
$img_height = $thumb_height;
}
$thumb = $this->create_image($img_width,$img_height);
imagecopyresized($thumb, $this->_source['img'], 0, 0, 0, 0, $img_width, $img_height, $this->_source['sizes'][0], $this->_source['sizes'][1]);
imagecopymerge($this->_current_thumb['img'], $thumb, $margin_left, $margin_top, 0, 0, $img_width, $img_height, 100);
return !is_null($filename) ? $this->save($filename) : true;
}
public function resize_crop($thumb_width, $thumb_height, $filename = null){
$this->clear_current_thumb();
$this->_current_thumb['img'] = $this->create_image($thumb_width, $thumb_height);
$this->_current_thumb['sizes'][0] = $thumb_width;
$this->_current_thumb['sizes'][1] = $thumb_height;
$ratio_x = $this->_source['sizes'][0] / $thumb_width;
$ratio_y = $this->_source['sizes'][1] / $thumb_height;
$mid_height = $thumb_height / 2;
$mid_width = $thumb_width / 2;
if($ratio_x > $ratio_y){
$final_width = $this->_source['sizes'][0] / $ratio_y;
$int_width = ($final_width / 2) - $mid_width;
imagecopyresampled($this->_current_thumb['img'],$this->_source['img'],-$int_width,0,0,0,$final_width,$thumb_height,$this->_source['sizes'][0],$this->_source['sizes'][1]);
}
elseif($ratio_x < $ratio_y){
$final_height = $this->_source['sizes'][1] / $ratio_x;
$int_height = ($final_height / 2) - $mid_height;
imagecopyresampled($this->_current_thumb['img'],$this->_source['img'],0,-$int_height,0,0,$thumb_width,$final_height,$this->_source['sizes'][0],$this->_source['sizes'][1]);
}
else{
imagecopyresampled($this->_current_thumb['img'],$this->_source['img'],0,0,0,0,$thumb_width,$thumb_height,$this->_source['sizes'][0],$this->_source['sizes'][1]);
}
return !is_null($filename) ? $this->save($filename) : true;
}
public function resize_width($thumb_width, $filename = null){
$this->clear_current_thumb();
return $this->resize_side($thumb_width, 0, $filename);
}
public function resize_height($thumb_height, $filename = null){
$this->clear_current_thumb();
return $this->resize_side($thumb_height, 1, $filename);
}
private function resize_side($size, $side = 0, $filename = null){
$this->clear_current_thumb();
$other_side = $side == 0 ? 1 : 0;
$ratio = $this->_source['sizes'][$side] / $size;
$other_size = $this->_source['sizes'][$other_side] / $ratio;
$width = $side == 0 ? $size : $other_size;
$height = $side == 1 ? $size : $other_size;
$this->_current_thumb['img'] = $this->create_image($width, $height);
$this->_current_thumb['sizes'] = array(0 => $width, 1 => $height);
imagecopyresampled($this->_current_thumb['img'],
$this->_source['img'],
0,0,0,0,
$width,
$height,
$this->_source['sizes'][0],
$this->_source['sizes'][1]
);
return !is_null($filename) ? $this->save($filename) : true;
}
function save($filename){
$this->put_icon_if_needed();
$this->put_text_if_needed();
return $this->save_thumb_image($this->_current_thumb['img'],
$this->_save_directory.$filename,
$this->_thumbs_quality
);
}
public function clean(){
$this->destroy_image($this->_source['img']);
$this->destroy_image($this->_current_thumb['img']);
$this->destroy_image($this->_icon['img']);
$this->destroy_image($this->_text['img']);
}
// -----------------
// PRIVATE FUNCTIONS
// -----------------
private function create_image($width, $height){
$img = imagecreatetruecolor($width, $height);
$this->manage_transparency($img);
return $img;
}
private function destroy_image($img){
if(!is_null($img)){
@imagedestroy($img);
unset($img);
}
}
private function clear_current_thumb(){
$this->destroy_image($this->_current_thumb['img']);
}
private function manage_transparency(&$toimage){
$type = $this->_source['sizes'][2];
if ($type == IMAGETYPE_GIF || $type == IMAGETYPE_PNG) {
$index = imagecolortransparent($this->_source['img']);
if ($index >= 0) {
$color = imagecolorsforindex($fromimage, $index);
$index = imagecolorallocate($toimage, $color['red'], $color['green'], $color['blue']);
imagefill($toimage, 0, 0, $index);
imagecolortransparent($toimage, $index);
}
elseif($type == IMAGETYPE_PNG) {
$this->transparent_background($toimage);
}
}
}
private function transparent_background(&$img){
imagealphablending($img, false);
$black = imagecolorallocate($img, 0, 0, 0);
imagefill($img, 0, 0, $black);
imagecolortransparent($img, $black);
}
private function build_image_from_path($path, $type){
switch($type){
case IMAGETYPE_GIF:
return imagecreatefromgif($path);
break;
case IMAGETYPE_PNG:
return imagecreatefrompng($path);
break;
case IMAGETYPE_JPEG:
default :
return imagecreatefromjpeg($path);
break;
}
}
private function save_thumb_image($thumb, $path, $quality){
switch(self::get_image_extension($path)){
case 'gif':
imagegif($thumb, $path);
break;
case 'png':
imagepng($thumb, $path);
break;
case 'jpeg':
case 'jpg':
case 'jfif':
case 'jpe':
default :
imagejpeg($thumb, $path, $quality);
break;
}
}
private function put_icon_if_needed(){
if(!is_null($this->_icon)){
$left = 0;
$top = 0;
$icon_width = $this->_icon['sizes'][0];
$icon_height = $this->_icon['sizes'][1];
$right = $this->_current_thumb['sizes'][0] - $icon_width;
$bottom = $this->_current_thumb['sizes'][1] - $icon_height;
$center_left = $right / 2;
$center_top = $bottom / 2;
if(is_int($this->_icon['position_left'])){
$this->_icon['margin_left'] = $this->_icon['position_left'];
}else{
switch($this->_icon['position_left']){
case 'left' : $this->_icon['margin_left'] = $left; break;
case 'right' : $this->_icon['margin_left'] = $right; break;
case 'center' : $this->_icon['margin_left'] = $center_left; break;
default : $this->_icon['margin_left'] = 0; break;
}
}
if(is_int($this->_icon['position_top'])){
$this->_icon['margin_top'] = $this->_icon['position_top'];
}else{
switch($this->_icon['position_top']){
case 'top' : $this->_icon['margin_top'] = $top; break;
case 'bottom' : $this->_icon['margin_top'] = $bottom; break;
case 'center' : $this->_icon['margin_top'] = $center_top; break;
default : $this->_icon['margin_top'] = 0; break;
}
}
if(!isset($this->_icon['is_built']) || !$this->_icon['is_built']){
$this->transparent_background($this->_icon['img']);
$this->_icon['is_built'] = true;
}
imagecopymerge($this->_current_thumb['img'], $this->_icon['img'], $this->_icon['margin_left'], $this->_icon['margin_top'], 0, 0, $icon_width, $icon_height, $this->_icon['alpha']);
}
}
private function put_text_if_needed(){
if(!is_null($this->_text)){
if(!isset($this->_text['color']) || $this->_text['color'] == null)
$this->_text['color'] = Array(255,255,0);
$left = 0;
$top = 0;
$right = $this->_current_thumb['sizes'][0] - $this->_text['sizes'][0];
$bottom = $this->_current_thumb['sizes'][1] - $this->_text['sizes'][1];
$center_left = $right / 2;
$center_top = $bottom / 2;
if(is_int($this->_text['position_left'])){
$this->_text['margin_left'] = $this->_text['position_left'];
}else{
switch($this->_text['position_left']){
case 'left' : $this->_text['margin_left'] = $left; break;
case 'right' : $this->_text['margin_left'] = $right; break;
case 'center' : $this->_text['margin_left'] = $center_left; break;
default : $this->_text['margin_left'] = 0; break;
}
}
if(is_int($this->_text['position_top'])){
$this->_text['margin_top'] = $this->_text['position_top'];
}else{
switch($this->_text['position_top']){
case 'top' : $this->_text['margin_top'] = $top; break;
case 'bottom' : $this->_text['margin_top'] = $bottom; break;
case 'center' : $this->_text['margin_top'] = $center_top; break;
default : $this->_text['margin_top'] = 0; break;
}
}
$color = imagecolorallocate($this->_current_thumb['img'], $this->_text['color'][0], $this->_text['color'][1], $this->_text['color'][2]);
$shadow_grey = imagecolorallocate($this->_current_thumb['img'], 128, 128, 128);
if(is_int(intval($this->_text['font']))){
if(isset($this->_text['shadow']) && $this->_text['shadow'] == true)
imagestring($this->_current_thumb['img'], $this->_text['font'], $this->_text['margin_left'] + 1, $this->_text['margin_top'] + 1, $this->_text['text'], $shadow_grey);
imagestring($this->_current_thumb['img'], $this->_text['font'], $this->_text['margin_left'], $this->_text['margin_top'], $this->_text['text'], $color);
}
else{
if(isset($this->_text['shadow']) && $this->_text['shadow'] == true)
imagettftext($this->_current_thumb['img'], $this->_text['size'], 0, $this->_text['margin_left'] + 1, $this->_text['margin_top'] + 1, $shadow_grey, $font, $this->_text['text']);
imagettftext($this->_current_thumb['img'], $this->_text['size'], 0, $this->_text['margin_left'], $this->_text['margin_top'], $color, $this->_text['font'], $this->_text['text']);
}
}
}
private function reload_text_sizes(){
$this->_text['sizes'][0] = imagefontwidth($this->_text['size']) * strlen($this->_text['text']);
$this->_text['sizes'][1] = imagefontheight($this->_text['size']) * 1;
}
}
?> |
