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Posted by gbbulldog on 08/29/06 15:29
Geuis wrote:
> Hi, new to the group.
>
> I use the following code to resize images my users upload. They're
> either blurry or they're jaggy.
>
> Can someone recommend modifications or different code that will resize
> images smoothly?
>
> $o_file = $_GET['add'];
>
> $image_info = getImageSize($o_file); // see EXIF for faster way
>
> switch ($image_info['mime']) {
> case 'image/gif':
> if (imagetypes() & IMG_GIF) { // not the same as IMAGETYPE
> $o_im = imageCreateFromGIF($o_file);
> } else {
> $ermsg = 'GIF images are not supported<br />';
> }
> break;
> case 'image/jpeg':
> if (imagetypes() & IMG_JPG) {
> $o_im = imageCreateFromJPEG($o_file);
> } else {
> $ermsg = 'JPEG images are not supported<br />';
> }
> break;
> case 'image/png':
> if (imagetypes() & IMG_PNG) {
> $o_im = imageCreateFromPNG($o_file);
> } else {
> $ermsg = 'PNG images are not supported<br />';
> }
> break;
> case 'image/wbmp':
> if (imagetypes() & IMG_WBMP) {
> $o_im = imageCreateFromWBMP($o_file);
> } else {
> $ermsg = 'WBMP images are not supported<br />';
> }
> break;
> default:
> $ermsg = $image_info['mime'].' images are not supported<br
> />';
> break;
> }
>
> if (!isset($ermsg)) {
>
> list($width, $height) = getimagesize($o_file);
>
> if($width>200){
>
> $t_wd = 200;
> $t_ht = round(($t_wd / $width) * $height);
> $t_im = imageCreateTrueColor($t_wd,$t_ht);
> imagecopyresampled ($t_im,$o_im,0,0,0,0,$t_wd,$t_ht,$width,$height);
>
> imageJPEG($t_im);
> imageDestroy($t_im);
>
> }else{
>
> imageJPEG($o_im);
> imageDestroy($o_im);
> }
>
> }
> ?>
Have a look at http://uk.php.net/manual/en/function.imagejpeg.php -
imagejpeg() has a third parameter for quality.
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