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<?php
/*
Author : Thomas RAMBAUD
Year : 2009
Version : 1.1
Free to use
*/
class thumbs_builder {
private $_source,
$_thumbs_quality,
$_save_directory,
$_border,
$_text,
$_icon,
$_current_thumb;
function __construct($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->_background_src = null;
$this->_icon = null;
$this->_current_thumb = null;
$this->_border = null;
$this->_text = null;
}
//-----------
// PROPERTIES
//-----------
// Getters
function get_source_path(){
return $this->_source['src'];
}
function get_source_width(){
return $this->_source['sizes'][0];
}
function get_source_height(){
return $this->_source['sizes'][1];
}
function get_save_directory(){
return $this->_save_directory;
}
function get_current_thumb(){
return $this->_current_thumb['img'];
}
function get_current_thumb_width(){
return $this->_current_thumb['sizes'][0];
}
function get_current_thumb_height(){
return $this->_current_thumb['sizes'][1];
}
static function get_random_string($chars_count = 4){
$caracteres = "123AaBbCcDdEe456fGgHhIiJjKkLlMmNn789PQqRrSsTtUuVvWwXxYyZz0";
$chaine = '';
srand(time());
for ($i=0;$i<$chars_count;$i++){
$chaine.=substr($caracteres, rand()%(strlen($caracteres)), 1);
}
return $chaine;
}
static function get_image_extension($fn_or_path){
return strtolower(substr($fn_or_path, strrpos($fn_or_path, '.') + 1));
}
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, $b);
}
// Setters
function set_source_src($source_src){
if(is_file($source_src)){
$this->_source['src'] = $source_src;
$this->_source['img'] = $this->build_image_from_path($source_src);
$this->_source['sizes'] = getimagesize($source_src);
return true;
}
else{
die('L\'image source définie n\'existe pas : <span style="color:red">'.$source_src.'</span>');
}
}
function set_save_directory($save_directory){
if(is_dir($save_directory)){
$this->_save_directory = $save_directory;
return true;
}
else{
die('Le dossier d\'enregistrement des miniatures n\'existe pas : <span style="color:red">'.$save_directory.'</span>');
}
}
function set_thumbs_quality($quality){
if(intval($quality)){
$this->_thumbs_quality = $quality;
return true;
}
else{
die('La qualité des miniatures à pour valeur un nombre compris entre 0 et 100 : <span style="color:red">'.$quality.'</span>');
}
}
function set_icon($icon_src, $position_top, $position_left, $alpha=null){
if(is_file($icon_src)){
$this->_icon['src'] = $icon_src;
$this->_icon['sizes'] = getimagesize($icon_src);
$this->set_icon_position($position_top, $position_left);
$this->_icon['img'] = $this->build_image_from_path($icon_src);
if($alpha != null) $this->set_icon_alpha($alpha);
return true;
}
else{
die('Le fichier image de l\'icône est inexistant ou n\'est pas un fichier : <span style="color:red">'.$icon_src.'</span>');
}
}
function set_icon_alpha($alpha){
if(intval($alpha)){
$this->_icon['alpha'] = $alpha;
return true;
}
else{
die('L\'opacité alpha de l\'icone doit être un nombre compris entre 0 et 100 : <span style="color:red">'.$alpha.'</span>');
}
}
function set_icon_position($position_top, $position_left){
$err_positions = 'Les positions autorisées sont "top", "bottom", "left", "right" et "center"';
$allowed_positions = Array('top', 'bottom', 'left', 'right', 'center');
if(in_array($position_top, $allowed_positions)){
$this->_icon['position_top'] = $position_top;
if(in_array($position_left, $allowed_positions)){
$this->_icon['position_left'] = $position_left;
return true;
}
else{
die($err_positions.' : <span style="color:red">'.$position_left.'</span>');
}
}
else{
die($err_positions.' : <span style="color:red">'.$position_top.'</span>');
}
}
function set_icon_autoresize($bool){
if(!is_bool($bool)) die('La fonction set_icon_autoresize n\'accepte que des booléens : true / false');
$this->_icon['autoresize'] = $bool;
}
function set_text($text, $position_top, $position_left, $hex_color, $size = 20){
if($text != null){
$this->_text['text'] = $text;
$err_positions = 'Les positions autorisées sont "top", "bottom", "left", "right" et "center"';
$allowed_positions = Array('top','bottom','left','right','center');
if(in_array($position_top, $allowed_positions)){
$this->_text['position_top'] = $position_top;
if(in_array($position_left, $allowed_positions)){
$this->_text['position_left'] = $position_left;
$this->set_text_size($size);
$this->set_text_font(3);
$this->set_text_color($hex_color);
$this->reload_text_sizes();
return true;
}
else{
die($err_positions.' : <span style="color:red">'.$position_left.'</span>');
}
}
else{
die($err_positions.' : <span style="color:red">'.$position_top.'</span>');
}
}
}
function set_text_color($hex){
$this->_text['color'] = $this->get_rgb_from_hexa($hex);
}
function set_text_font($font){
$this->_text['font'] = $font;
$this->reload_text_sizes();
}
function set_text_size($size){
if(is_int($size)){
$this->_text['size'] = $size;
$this->reload_text_sizes();
}
}
function set_text_autoresize($bool){
if(!is_bool($bool)) die('La fonction set_text_autoresize n\'accepte que des booléens : true / false');
$this->_text['autoresize'] = $bool;
}
function set_text_shadow($bool){
if(!is_bool($bool)) die('La fonction set_text_shadow n\'accepte que des booléens : true / false');
$this->_text['shadow'] = $bool;
}
function remove_icon(){
$this->_icon = null;
}
function remove_text(){
$this->_text = null;
}
// ----------------
// PUBLIC FUNCTIONS
// ----------------
// Resize the source bitmap in a layer with a background color
function resize($thumb_width, $thumb_height, $background_color, $filename = null){
try {
$this->clear_current_thumb();
$this->_current_thumb['img'] = imagecreatetruecolor($thumb_width,$thumb_height);
$this->_current_thumb['sizes'][0] = $thumb_width;
$this->_current_thumb['sizes'][1] = $thumb_height;
$color = $this->get_rgb_from_hexa($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;
}
$thumb = imagecreatetruecolor($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, $img_height, 100);
if(!is_null($filename)){
return $this->save($filename);
}
else{
return true;
}
}
catch (Exception $e) {
die($e->__toString().'. Impossible de redimensionner l\'image à partir des dimensions voulues : '.$thumb_width.' * '.$thumb_height);
}
}
// Crop then resize the source bitmap in the current bitmap
function resize_crop($thumb_width, $thumb_height, $filename = null){
try {
$this->clear_current_thumb();
$this->_current_thumb['img'] = imagecreatetruecolor($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]);
}
if(!is_null($filename)){
return $this->save($filename);
}
else{
return true;
}
}
catch(Exception $e){
die($e->__toString().'. Impossible de retailler l\'image à partir des dimensions voulues : '.$thumb_width.' * '.$thumb_height);
}
}
// Resize on width, automatic height resizing
function resize_width($thumb_width, $filename = null){
try {
$this->clear_current_thumb();
$ratio_x = $this->_source['sizes'][0] / $thumb_width;
$thumb_height = $this->_source['sizes'][1] / $ratio_x;
$this->_current_thumb['img'] = imagecreatetruecolor($thumb_width,$thumb_height);
$this->_current_thumb['sizes'][0] = $thumb_width;
$this->_current_thumb['sizes'][1] = $thumb_height;
imagecopyresampled($this->_current_thumb['img'],$this->_source['img'],0,0,0,0,$thumb_width,$thumb_height,$this->_source['sizes'][0],$this->_source['sizes'][1]);
if(!is_null($filename)){
return $this->save($filename);
}
else{
return true;
}
}
catch(Exception $e){
die($e->__toString().'Impossible de redimensionner cette image à partir de cette largeur : '.$thumb_width);
}
}
// Resize on height, automatic width resizing
function resize_height($thumb_height, $filename = null){
try {
$this->clear_current_thumb();
$ratio_y = $this->_source['sizes'][1] / $thumb_height;
$thumb_width = $this->_source['sizes'][0] / $ratio_y;
$this->_current_thumb['img'] = imagecreatetruecolor($thumb_width,$thumb_height);
$this->_current_thumb['sizes'][0] = $thumb_width;
$this->_current_thumb['sizes'][1] = $thumb_height;
imagecopyresampled($this->_current_thumb['img'],$this->_source['img'],0,0,0,0,$thumb_width,$thumb_height,$this->_source['sizes'][0],$this->_source['sizes'][1]);
if(!is_null($filename)){
return $this->save($filename);
}
else{
return true;
}
}
catch(Exception $e){
die($e->__toString().'Impossible de redimensionner cette image à partir de cette hauteur : '.$thumb_height);
}
}
// Save the current thumb into the save directory with the choosen filename
function save($filename){
$this->put_icon_if_needed();
$this->put_text_if_needed();
return $this->save_thumb_image($this->_current_thumb['img'], $this->_save_directory.$filename, $this->_thumbs_quality);
}
// Destroy the current thumb, the icon, the source image, and the text if not are nulls
function clean(){
@imagedestroy($this->_source['img']);
unset($this->_source['img']);
if(!is_null($this->_current_thumb)){
@imagedestroy($this->_current_thumb['img']);
unset($this->_current_thumb['img']);
$this->_current_thumb = null;
}
if(!is_null($this->_icon)){
@imagedestroy($this->_icon['img']);
unset($this->_icon);
$this->_icon = null;
}
if(!is_null($this->_text)){
@imagedestroy($this->_text['img']);
unset($this->_text);
$this->_text = null;
}
}
// -----------------
// PRIVATE FUNCTIONS
// -----------------
// create the source image
private function build_image_from_path($path){
try {
$type = $this->get_image_extension($path);
switch($type){
case 'gif':
return imagecreatefromgif($path); break;
case 'png':
return imagecreatefrompng($path); break;
case 'jpeg':
case 'jfif':
case 'jpg':
default :
return imagecreatefromjpeg($path); break;
}
}
catch (Exception $e){
die($e->__toString().'. Impossible de créer l\'image à partir de la source : <span style="color:red">'.$path.'</span>');
}
}
// Save the thumb image to chosen quality
private function save_thumb_image($thumb, $path, $quality){
try {
$type = $this->get_image_extension($path);
switch($type){
case 'gif':
imagegif($thumb,$path); break;
case 'png':
imagepng($thumb,$path); break;
case 'jpeg':
case 'jpg':
case 'jfif':
default :
imagejpeg($thumb,$path,$quality); break;
}
}
catch (Exception $e){
die($e->toString().'. Impossible de créer la miniature à l\'endroit spécifié ou la librarie GD n\'est pas activée : <span style="color:red">'.$path.'</span>');
}
}
// Put the icon on the current thumb if not is null, rebuild if has changed
private function put_icon_if_needed(){
if(!is_null($this->_icon)){
$left = 0;
$top = 0;
$right = $this->_current_thumb['sizes'][0] - $this->_icon['sizes'][0];
$bottom = $this->_current_thumb['sizes'][1] - $this->_icon['sizes'][1];
$center_left = $right / 2;
$center_top = $bottom / 2;
switch($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 : $this->_icon['margin_left'] = 0; break;
}
switch($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']) || !$this->_icon['is_built']){
imagealphablending($this->_icon['img'],false);
$black = imagecolorallocate($this->_icon['img'],0,0,0);
imagefill($this->_icon['img'],0,0,$black);
imagecolortransparent($this->_icon['img'],$black);
$this->_icon['is_built'] = true;
}
$icon_width = $this->_icon['sizes'][0];
$icon_height = $this->_icon['sizes'][1];
imagecopymerge($this->_current_thumb['img'], $this->_icon['img'], $this->_icon['margin_left'], $this->_icon['margin_top'], 0, 0, $icon_width, $icon_height, $this->_icon['alpha']);
return true;
}
else{
return false;
}
}
// Put the text on the current thumb if not is null, rebuild if has changed
private function put_text_if_needed(){
if(!is_null($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 = $bottom / 2;
switch($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 : $this->_text['margin_left'] = 0; break;
}
switch($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($this->_text['font'])){
if(isset($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']);
}
return true;
}
else{
return false;
}
}
// Calculate the new text width and height according to the font width and the number of chars
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;
}
// Delete the temporary thumb in memory
private function clear_current_thumb(){
if($this->_current_thumb != null){
@imagedestroy($this->_current_thumb['img']);
if(isset($this->_current_thumb)) $this->_current_thumb = null;
return is_null($this->_current_thumb);
}
else{
return true;
}
}
}
?> |
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