Thumbnail

[chrisw]

Hello,



I would like to make thumbnails with gd1 or 2.

I have the code to do this but i don't know how to implement this in images.mdu



Can someone help?



Code:



<?php

function make_thumb ($img_src, $img_th)

{

// some configuration, please match to your server settings



$gd_version = 2;

$thumb_on = 'x';

$thumb_size = 100;

$quality = 30;

$img_size = GetImageSize ($img_src);

$img_in = ImageCreateFromJPEG ($img_src);

if ($thumb_on == 'y')

{

$img_x = ($thumb_size/$img_size[1]) * $img_size[0];

$img_y = $thumb_size;

}

else

{

$img_y = ($thumb_size/$img_size[0]) * $img_size[1];

$img_x = $thumb_size;

}

if ($gd_version == '1')

{

$img_out = ImageCreate($img_x, $img_y);

ImageCopyResized ($img_out, $img_in, 0, 0, 0, 0, $img_x, $img_y, $img_size[0], $img_size[1]);

}

elseif ($gd_version == '2')

{

$img_out = ImageCreateTrueColor($img_x, $img_y);

ImageCopyResampled ($img_out, $img_in, 0, 0, 0, 0, $img_x, $img_y, $img_size[0], $img_size[1]);

}

ImageJPEG ($img_out, $img_th, $quality);

ImageDestroy ($img_out);

ImageDestroy ($img_in);

}

if (isset ($_FILES['image']['name']))

{

$fn = $_FILES['image']['name'];

$src = 'images/'.$fn;

$th = 'thumbs/'.$fn;

if (!@move_uploaded_file ($_FILES['image']['tmp_name'], $src)) die ('Can not upload file...');

make_thumb ($src, $th);

echo "Done!<BR>Original Image:<img src=\"$src\"><BR>Thumbnail Image:<img src=\"$th\">";

}

?>

<form name="form" id="form" action="$PHP_SELF?mod=images" method="post" enctype="multipart/form-data">Thumbnail this file: <input name="image" type="file"><input type="submit" value="Send File"></form>



Regards,



Chris

[FI-DD]

Why don't you use the built-in thumbnail function?

[chrisw]

Because the standard function does not make that nice thumbnails.

The qauality is not so good as with GD 2.

[FI-DD]

Open images.mdu and change imagecopyresize to imagecopyresampled.



That's it. And you are right, the quality is better.



(I will change this in the download file as well.)

[samiro]

in my file - uts is set as imagecopyresampled
but how can i make it better...
the compress pf the jped in very high...

i want a quality like 90-95%

thank you
[/code]

[FI-DD]

Right now the script uses the default compression rate which should be about 75%.

To change it you have to add the compression rate as a third parameter in the function.

For example now:

Code: Select all

imagejpeg($image, $thumb_in);

and after:

Code: Select all

imagejpeg($image, $thumb_in, 95);

Do this for all occurrances of imagejpeg() in images.mdu.

[samiro]

after - or replace ?

[eberswine]

find

Code: Select all

imagejpeg($image, $thumb_in);

replace

Code: Select all

imagejpeg($image, $thumb_in, 95);

replace all occurrences

[samiro]

can i change even

imagepng($image, $thumb_in);
and
imagegif($image, $thumb_in);

to

imagepng($image, $thumb_in, 95);
imagegif($image, $thumb_in, 95);

[samiro]

did i have to change also this ?

Code: Select all

case 'jpg':
$original_image = imageCreateFromJPEG($thumb_in);
break;


[eberswine]

samiro..

what I would do, is upload some test gifs, jpgs and pngs... then after you upload them, just look at the properties of the picture and see the size in bytes or kb's... then, what I would do is make changes to your images.mdu page and then upload the same images again and see if the size in bytes or kb's went up!

That is all your after!