function save_scaled($img_name, $dst_image_name, $ext, $max_width, $max_height)
{
$size = getimagesize($img_name);
$width = $size[0];
$height = $size[1];
if($max_width == 0)
{
$max_width = $width;
}
if($max_height == 0)
{
$max_height = $height;
}
$src = image_create_from($img_name, $ext);
if ($width <= $max_width)
{
if ($height <= $max_height)
{
$tn_width = $width;
$tn_height = $height;
}
else
{
$tn_height = $max_height;
$tn_width = round($max_height * $width / $height );
}
}
elseif ($height <= $max_height)
{
$tn_width = $max_width;
$tn_height = round($max_width * $height / $width);
}
else
{
$x_ratio = $max_width / $width;
$y_ratio = $max_height / $height;
if ($x_ratio <= $y_ratio)
{
$tn_width = $max_width;
$tn_height = round($x_ratio * $height);
}
else
{
$tn_height = $max_height;
$tn_width = round($y_ratio * $width);
}
}
$dst = imagecreatetruecolor($tn_width, $tn_height);
// imagecopyresampled($dst, $src, 0, 0, 0, 0, imagesx($dst), imagesy($dst), $width, $height);
imagecopyresampled($dst, $src, 0, 0, 0, 0, $tn_width, $tn_height, $width, $height);
image_save($dst, $dst_image_name, $ext);
imagedestroy($src);
imagedestroy($dst);
}
function image_create_from($image_full_path, $type)
{
switch($type)
{
case 'jpg':
case 'jpeg':
$im = imagecreatefromjpeg($image_full_path);
break;
case 'png':
$im = imagecreatefrompng($image_full_path);
break;
case 'gif':
$im = imagecreatefromgif ($image_full_path);
break;
default: // it never gets here
print 'Invalid picture format: '.$type;
exit;
}
return $im;
}
function image_save($image, &$image_full_path, $ext)
{
switch($ext)
{
case 'jpg':
case 'jpeg':
$im = imagejpeg($image, $image_full_path, 100);
break;
case 'png':
$im = imagepng($image, $image_full_path);
break;
case 'gif':
if (function_exists("imagegif"))
{
$im = imagegif($image, $image_full_path);
}
else
{
change_ext_to_jpg($image_full_path);
$im = imagejpeg($image, $image_full_path, 100);
}
break;
default: // it never gets here
print 'Invalid picture format: '.$ext;
//exit;
}
return $im;
}
?>
Khoa Khám bệnh
LIÊN KẾT WEB
TIN NỔI BẬT
