RE: [PHP] GD 2.0.28 + PHP 4.4.2 + pixelation :(
> imagecopyresampled might help you... I use that and it works > without > problems. > Hi Peter, " I have done some searching via google and some answers say change copyimageresampled to copyimageresized etc" I have tried your suggestion with the same results ... that is what I was using first :( S -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] GD 2.0.28 + PHP 4.4.2 + pixelation :(
Steven Macintyre wrote:
> Hi All,
>
> I have done some searching via google and some answers say change
> copyimageresampled to copyimageresized etc
which should be the correct; use copyimageresampled()
>
> I have tried all fixes ... to no avail
>
>
> I have one image here 1280 x 960 (150 dpi) 24 depth
DPI is completely irrelevant.
the '24 depth' sounds like your using a PNG as input rather
that a JPEG (which your function expects)
your not making sure that the new width & height are always
integers. use intval() or ceil() or floor() (depending on your
your and the context)... I have no idea what happens if you pass
floats (or non-numeric data) in the relevant arguments of image*()
functinons but I'm guessing it *could* lead to unexplained weirdness
of some sort.
read the man page for imagejpeg():
http://php.net/manual/en/function.imagejpeg.php
take note of the third argument, personally I always set it to 100,
anything less and clients have a tendency to start complaining about image
quality.
>
> When using the following it pixelates ...
>
> function createthumb($name,$filename,$new_w,$new_h)
> {
> $system=explode(".",$name);
> $src_img=imagecreatefromjpeg($name);
> $old_x=imageSX($src_img);
> $old_y=imageSY($src_img);
> if ($old_x > $old_y)
> {
> $thumb_w=$new_w;
> $thumb_h=$old_y*($new_h/$old_x);
> }
> if ($old_x < $old_y)
> {
> $thumb_w=$old_x*($new_w/$old_y);
> $thumb_h=$new_h;
> }
> if ($old_x == $old_y)
> {
> $thumb_w=$new_w;
> $thumb_h=$new_h;
> }
> $dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
>
> imagecopyresized($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
try: imagecopyresampled();
> imagejpeg($dst_img,$filename);
> imagedestroy($dst_img);
> imagedestroy($src_img);
> }
>
> Which I am of course calling with
> createthumb($add,'../pics/'.$largeval,350,263);
>
> Now ... afaik my new sizes are proportional to the big ones ... but it
> pixelates :(
>
> However,
>
> Using an image 1600 x 1200 (96 dpi) 24 depth it works and there is no
> pixilation
>
> Can someone perhaps assist now?
>
>
>
> Kind Regards,
>
>
> Steven Macintyre
> http://steven.macintyre.name
> --
>
> http://www.friends4friends.co.za
>
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] GD 2.0.28 + PHP 4.4.2 + pixelation :(
Hi,
imagecopyresampled might help you... I use that and it works without
problems.
/Peter
-Original Message-
From: Steven Macintyre [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 27, 2006 10:17 AM
To: php-general@lists.php.net
Subject: [PHP] GD 2.0.28 + PHP 4.4.2 + pixelation :(
Hi All,
I have done some searching via google and some answers say change
copyimageresampled to copyimageresized etc
I have tried all fixes ... to no avail
I have one image here 1280 x 960 (150 dpi) 24 depth
When using the following it pixelates ...
function createthumb($name,$filename,$new_w,$new_h)
{
$system=explode(".",$name);
$src_img=imagecreatefromjpeg($name);
$old_x=imageSX($src_img);
$old_y=imageSY($src_img);
if ($old_x > $old_y)
{
$thumb_w=$new_w;
$thumb_h=$old_y*($new_h/$old_x);
}
if ($old_x < $old_y)
{
$thumb_w=$old_x*($new_w/$old_y);
$thumb_h=$new_h;
}
if ($old_x == $old_y)
{
$thumb_w=$new_w;
$thumb_h=$new_h;
}
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
imagecopyresized($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
imagejpeg($dst_img,$filename);
imagedestroy($dst_img);
imagedestroy($src_img);
}
Which I am of course calling with
createthumb($add,'../pics/'.$largeval,350,263);
Now ... afaik my new sizes are proportional to the big ones ... but it
pixelates :(
However,
Using an image 1600 x 1200 (96 dpi) 24 depth it works and there is no
pixilation
Can someone perhaps assist now?
Kind Regards,
Steven Macintyre
http://steven.macintyre.name
--
http://www.friends4friends.co.za
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
