image
Manipuler les images
La classe image fournit plusieurs méthodes simples permettant de redimensionner, compresser, convertir des images, de leur ajouter des textes et des logos.
Les Méthodes
- image - Nouvelle Instance
- addbackground - Définition de l'arriere plan
- resize - Redimensionnement de l'image
- addlogo - Ajouter un logo
- mergelogo - Fusionner un logo
- makecolor - Créer une couleur
- setfont - Choisir une police
- addtext - Ajouter du texte
- send_image - Envoyer l'image
Exemples
La Source
<?php
class image {
var $bg;
var $logo;
var $logox;
var $logoy;
var $bgx;
var $bgy;
var $fontfile;
var $color;
function image($bgfile='') {
image::addbackground($bgfile);
}
function createimagefromtype($file,$handler) {
$size = getimagesize($file);
$type=$size[2];
switch ($type) {
case 2 : $imhandler = imagecreatefromjpeg($file);
break;
case 3 : $imhandler = imagecreatefrompng($file);
break;
case 1 : $imhandler = imagecreatefromgif($file);
break;
}
$xtmpstr=$handler.'x';
$ytmpstr=$handler.'y';
$this->$xtmpstr=$size[0];
$this->$ytmpstr=$size[1];
return $imhandler;
}
function resize ( $thumbw , $thumbh , $border) {
$size [0]=$this->bgx;
$size [1]=$this->bgy;
if ($border==1) {
$scale = min($thumbw/$size[0], $thumbh/$size[1]);
$width = (int)($size[0]*$scale);
$height = (int)($size[1]*$scale);
$deltaw = (int)(($thumbw - $width)/2);
$deltah = (int)(($thumbh - $height)/2);
$dst_img = ImageCreateTrueColor($thumbw, $thumbh);
if ( !empty($this->color))
imagefill ( $dst_img, 0, 0, $this->color );
$this->bgx=$thumbw;
$this->bgy=$thumbh;
}
elseif ($border==0) {
$scale = min($thumbw/$size[0], $thumbh/$size[1]);
$width = (int)($size[0]*$scale);
$height = (int)($size[1]*$scale);
$deltaw = 0;
$deltah = 0;
$dst_img = ImageCreateTrueColor($width, $height);
$this->bgx=$width;
$this->bgy=$height;
}
$src_img = $this->bg;
ImageCopyResampled($dst_img, $src_img, $deltaw, $deltah, 0, 0, $width, $height, ImageSX($src_img),ImageSY($src_img));
$this->bg=$dst_img;
imagedestroy($src_img);
}
function addbackground($bgfile) {
if ( !empty($bgfile) && file_exists($bgfile) ) $this->bg = image::createimagefromtype($bgfile,'bg');
imagealphablending( $this->bg ,TRUE );
}
function addlogo($file) {
$this->logo = image::createimagefromtype($file,'logo');
imagealphablending( $this->logo ,TRUE );
$size = getimagesize($file);
$this->logox=$size[0];
$this->logoy=$size[1];
}
function mergelogo($x,$y,$alpha=100) {
if ($x<0) $x=$this->bgx-$this->logox+$x;
if ($y<0) $y=$this->bgy-$this->logoy+$y;
return imagecopymerge ( $this->bg, $this->logo, $x, $y, 0, 0, $this->logox, $this->logoy, $alpha );
}
function makecolor($red, $green, $blue) {
$this->color = imagecolorallocate( $this->bg, $red, $green, $blue );
}
function setfont($fontfile) {
$this->fontfile=$fontfile;
}
function addtext ($text,$x=0,$y=0,$size=12,$angle=0) {
$text= preg_replace('`(?<!\r)\n`',"\r\n",$text);
$box=imagettfbbox ( $size, $angle, $this->fontfile, $text );
if ($x<0) {
$x=$this->bgx - max($box[2],$box[4]) + $x;
} else {
$x=max(-$box[0],-$box[6]) + $x;
}
if ($y<0) {
$y=$this->bgy - max($box[1],$box[3]) + $y;
} else {
$y=max(-$box[7],-$box[5]) + $y;
}
imagettftext($this->bg, $size, $angle, $x, $y, $this->color, $this->fontfile , $text );
}
function send_image($type,$file='',$compress=-1) {
switch ($type) {
case 'JPG' :
if (!$file) header("Content-type: image/jpeg");
if ($compress==-1) $compress=100;
return imagejpeg($this->bg,$file,$compress);
break;
case 'PNG' :
if (!$file) header("Content-type: image/png");
if ($compress!=-1)
imagetruecolortopalette ( $this->bg, true, $compress);
return imagepng($this->bg,$file,$compress);
break;
case 'GIF' :
if (!$file) header("Content-type: image/gif");
if ($compress!=-1)
imagetruecolortopalette ( $this->bg, true, $compress);
return imagegif($this->bg,$file,$compress);
break;
default: return 0;
}
imagedestroy($this->bg);
imagedestroy($this->logo);
}
}
?>
class image {
var $bg;
var $logo;
var $logox;
var $logoy;
var $bgx;
var $bgy;
var $fontfile;
var $color;
function image($bgfile='') {
image::addbackground($bgfile);
}
function createimagefromtype($file,$handler) {
$size = getimagesize($file);
$type=$size[2];
switch ($type) {
case 2 : $imhandler = imagecreatefromjpeg($file);
break;
case 3 : $imhandler = imagecreatefrompng($file);
break;
case 1 : $imhandler = imagecreatefromgif($file);
break;
}
$xtmpstr=$handler.'x';
$ytmpstr=$handler.'y';
$this->$xtmpstr=$size[0];
$this->$ytmpstr=$size[1];
return $imhandler;
}
function resize ( $thumbw , $thumbh , $border) {
$size [0]=$this->bgx;
$size [1]=$this->bgy;
if ($border==1) {
$scale = min($thumbw/$size[0], $thumbh/$size[1]);
$width = (int)($size[0]*$scale);
$height = (int)($size[1]*$scale);
$deltaw = (int)(($thumbw - $width)/2);
$deltah = (int)(($thumbh - $height)/2);
$dst_img = ImageCreateTrueColor($thumbw, $thumbh);
if ( !empty($this->color))
imagefill ( $dst_img, 0, 0, $this->color );
$this->bgx=$thumbw;
$this->bgy=$thumbh;
}
elseif ($border==0) {
$scale = min($thumbw/$size[0], $thumbh/$size[1]);
$width = (int)($size[0]*$scale);
$height = (int)($size[1]*$scale);
$deltaw = 0;
$deltah = 0;
$dst_img = ImageCreateTrueColor($width, $height);
$this->bgx=$width;
$this->bgy=$height;
}
$src_img = $this->bg;
ImageCopyResampled($dst_img, $src_img, $deltaw, $deltah, 0, 0, $width, $height, ImageSX($src_img),ImageSY($src_img));
$this->bg=$dst_img;
imagedestroy($src_img);
}
function addbackground($bgfile) {
if ( !empty($bgfile) && file_exists($bgfile) ) $this->bg = image::createimagefromtype($bgfile,'bg');
imagealphablending( $this->bg ,TRUE );
}
function addlogo($file) {
$this->logo = image::createimagefromtype($file,'logo');
imagealphablending( $this->logo ,TRUE );
$size = getimagesize($file);
$this->logox=$size[0];
$this->logoy=$size[1];
}
function mergelogo($x,$y,$alpha=100) {
if ($x<0) $x=$this->bgx-$this->logox+$x;
if ($y<0) $y=$this->bgy-$this->logoy+$y;
return imagecopymerge ( $this->bg, $this->logo, $x, $y, 0, 0, $this->logox, $this->logoy, $alpha );
}
function makecolor($red, $green, $blue) {
$this->color = imagecolorallocate( $this->bg, $red, $green, $blue );
}
function setfont($fontfile) {
$this->fontfile=$fontfile;
}
function addtext ($text,$x=0,$y=0,$size=12,$angle=0) {
$text= preg_replace('`(?<!\r)\n`',"\r\n",$text);
$box=imagettfbbox ( $size, $angle, $this->fontfile, $text );
if ($x<0) {
$x=$this->bgx - max($box[2],$box[4]) + $x;
} else {
$x=max(-$box[0],-$box[6]) + $x;
}
if ($y<0) {
$y=$this->bgy - max($box[1],$box[3]) + $y;
} else {
$y=max(-$box[7],-$box[5]) + $y;
}
imagettftext($this->bg, $size, $angle, $x, $y, $this->color, $this->fontfile , $text );
}
function send_image($type,$file='',$compress=-1) {
switch ($type) {
case 'JPG' :
if (!$file) header("Content-type: image/jpeg");
if ($compress==-1) $compress=100;
return imagejpeg($this->bg,$file,$compress);
break;
case 'PNG' :
if (!$file) header("Content-type: image/png");
if ($compress!=-1)
imagetruecolortopalette ( $this->bg, true, $compress);
return imagepng($this->bg,$file,$compress);
break;
case 'GIF' :
if (!$file) header("Content-type: image/gif");
if ($compress!=-1)
imagetruecolortopalette ( $this->bg, true, $compress);
return imagegif($this->bg,$file,$compress);
break;
default: return 0;
}
imagedestroy($this->bg);
imagedestroy($this->logo);
}
}
?>
