| Pashkela |
27.06.2009 13:34 |
PHP код:
<pre>
<?php
@set_time_limit(0);
@ini_set("display_errors","1");
function resize($img, $thumb_width, $newfilename)
{
$max_width=$thumb_width;
//Check if GD extension is loaded
if (!extension_loaded('gd') && !extension_loaded('gd2'))
{
trigger_error("GD is not loaded", E_USER_WARNING);
return false;
}
//Get Image size info
list($width_orig, $height_orig, $image_type) = getimagesize($img);
switch ($image_type)
{
case 1: $im = imagecreatefromgif($img); break;
case 2: $im = imagecreatefromjpeg($img); break;
case 3: $im = imagecreatefrompng($img); break;
default: trigger_error('Unsupported filetype!', E_USER_WARNING); break;
}
/*** calculate the aspect ratio ***/
$aspect_ratio = (float) $height_orig / $width_orig;
/*** calulate the thumbnail width based on the height ***/
$thumb_height = round($thumb_width * $aspect_ratio);
while($thumb_height>$max_width)
{
$thumb_width-=10;
$thumb_height = round($thumb_width * $aspect_ratio);
}
$newImg = imagecreatetruecolor($thumb_width, $thumb_height);
/* Check if this image is PNG or GIF, then set if Transparent*/
if(($image_type == 1) OR ($image_type==3))
{
imagealphablending($newImg, false);
imagesavealpha($newImg,true);
$transparent = imagecolorallocatealpha($newImg, 255, 255, 255, 127);
imagefilledrectangle($newImg, 0, 0, $thumb_width, $thumb_height, $transparent);
}
imagecopyresampled($newImg, $im, 0, 0, 0, 0, $thumb_width, $thumb_height, $width_orig, $height_orig);
//Generate the file, and rename it to $newfilename
switch ($image_type)
{
case 1: imagegif($newImg,$newfilename); break;
case 2: imagejpeg($newImg,$newfilename); break;
case 3: imagepng($newImg,$newfilename); break;
default: trigger_error('Failed resize image!', E_USER_WARNING); break;
}
return $newfilename;
}
//Пример вызова
resize("foto.jpg", 50, "foto1.jpg");
echo "New picture - foto1.jpg";
?>
</pre>
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