source = $source;
$this->max_width = $max_width;
$this->max_height = $max_height;
$this->dest = $dest;
}
// Get the width of the original image
function GetWidth()
{
$size = GetImageSize($this->source);
return $size[0];
//return ImageSX($this->source);
}
// Get the height of the original image
function GetHeight()
{
$size = GetImageSize($this->source);
return $size[1];
//return ImageSY($this->source);
}
// Get the type of the image
function GetType()
{
$size = GetImageSize($this->source);
switch ( $size[2] )
{
case 1:
return 'gif';
break;
case 2:
return 'jpg';
break;
case 3:
return 'png';
break;
}
}
// Width calculation of thumbnail
function CalcWidth()
{
if ($this->GetWidth() > $this->GetHeight()) {
//
// let's take the width as the largest dimension
//
return ($this->max_width);
} else {
//
// the width will have to be of the same ration as the height
//
return(floor(($this->max_height * $this->GetWidth()) / $this->GetHeight()));
}
}
// Height calculation of thumbnail
function CalcHeight()
{
if ($this->GetWidth() > $this->GetHeight()) {
//
// the height will have to be of the same ration as the width
//
return(floor(($this->max_width * $this->GetHeight()) / $this->GetWidth()));
} else {
//
// let's take the height as the largest dimension
//
return($this->max_height);
}
}
// Creating a thumbnail
function Create()
{
switch ($this->GetType())
{
case 'gif':
$img_src = ImageCreateFromGIF ( $this->source );
break;
case 'jpg':
$img_src = ImageCreateFromJPEG ( $this->source );
break;
case 'png':
$img_src = ImageCreateFromPNG ( $this->source );
break;
}
$gd = 2;
$img_des = ImageCreateTrueColor ( $this->CalcWidth(), $this->CalcHeight() );
if (!$img_des) {
$gd = 1;
$img_des = ImageCreate( $this->CalcWidth(), $this->CalcHeight() );
}
for($i=0; $i<256; $i++)
imagecolorallocate($img_des, $i, $i, $i);
if ($gd==2) {
ImageCopyResampled( $img_des, $img_src, 0, 0, 0, 0, $this->CalcWidth(), $this->CalcHeight(), $this->GetWidth(), $this->GetHeight() );
} else {
imagecopyresized( $img_des, $img_src, 0, 0, 0, 0, $this->CalcWidth(), $this->CalcHeight(), $this->GetWidth(), $this->GetHeight() );
}
return $img_des;
}
// Output the thumbnail to file or directly to a client
function Output()
{
if (file_exists($this->dest)) {
$old_size = getimagesize($this->dest);
if ($old_size[0] == $this->CalcWidth())
$exist = true;
}
if ($exist==false) {
switch ($this->GetType())
{
case 'gif':
if (empty($this->dest))
{
header ("Content-type: image/jpeg");
return ImageJPEG($this->Create());
}
else
{
return ImageJPEG( $this->Create(), $this->dest );
}
break;
case 'jpg':
if (empty($this->dest))
{
header ("Content-type: image/jpeg");
return ImageJPEG($this->Create());
}
else
{
return ImageJPEG( $this->Create(), $this->dest );
}
break;
case 'png':
if (empty($this->dest))
{
header ("Content-type: image/png");
return ImagePNG($this->Create());
}
else
{
return ImagePNG( $this->Create(), $this->dest );
}
break;
}
imagedestroy($img_des);
}
}
}
?>
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sabato 20 aprile 2024