Re: [PHP] Generate Thumbnail gif's

[Mike Migurski]

Is there any pre-written code available on the net to generate thumbnail
images for a picture. I mean I send the path of the image and my PHP
Script should be able to generate a gif file of size 100x71 or something
like that.

If your server has Imagemagick installed (it seems pretty common), try:

`convert -size 100x71 old.gif new.gif`;

That will scale your image into 100x71 pixels, and will maintain the
aspect ratio.

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[PHP] Generate Thumbnail gif's

[Vijaya_Manda]

Dear all,

Is there any pre-written code available on the net to generate thumbnail
images for a picture.
I mean I send the path of the image and my PHP Script should be able to
generate a gif file of size 100x71 or something like that.

Thanks  Regards, 
___ 
PHPLover 
 
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Göd döësn't pläy dícë. 
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Re: [PHP] Generate Thumbnail gif's

[Leif K-Brooks]

Vijaya_Manda wrote:

Is there any pre-written code available on the net to generate thumbnail
images for a picture.
I mean I send the path of the image and my PHP Script should be able to
generate a gif file of size 100x71 or something like that.
 

Images will look stretched if you do that, but here are two functions to 
resize an image with a new width or height proportional to its current 
size. Pass them GD image resources created with imagecreatefrompng() and 
friends.

function imageresizeheight($img, $newheight) {
   $oldheight = imagesy($img);
   $oldwidth  = imagesx($img);
   $newwidth  = $oldwidth * ($newheight / $oldheight);
   $newimg = imagecreatetruecolor($newwidth, $newheight);
   imagecopyresized($newimg, $img, 0, 0, 0, 0, $newwidth, $newheight, 
$oldwidth, $oldheight);
   return $newimg;
}
function imageresizewidth($img, $newwidth) {
   $oldheight = imagesy($img);
   $oldwidth  = imagesx($img);
   $newheight  = $oldheight * ($newwidth / $oldwidth);
   $newimg = imagecreatetruecolor($newwidth, $newheight);
   imagecopyresized($newimg, $img, 0, 0, 0, 0, $newwidth, $newheight, 
$oldwidth, $oldheight);
   return $newimg;
}

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Re: [PHP] Generate Thumbnail gif's

[Leif K-Brooks]

Vijay Killu wrote:

That will resize the image and display it as a thumbnail. 
 

No, they will give you a GD image resource to do what you want with.

What I want is a new image to be created. I mean a .gif file. 
 

You can't create a GIF, but you can use imagepng() or imagejpeg() to 
output it to a file as a PNG or JPEG.

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Re: [PHP] Generate Thumbnail gif's

[Curt Zirzow]

* Thus wrote Leif K-Brooks ([EMAIL PROTECTED]):
 Vijaya_Manda wrote:
 
 Is there any pre-written code available on the net to generate thumbnail
 images for a picture.
 I mean I send the path of the image and my PHP Script should be able to
 generate a gif file of size 100x71 or something like that.
  
 
 Images will look stretched if you do that, but here are two functions to 
 resize an image with a new width or height proportional to its current 
 size. Pass them GD image resources created with imagecreatefrompng() and 
 friends.

you could center a proportinal image onto a 100x71 background
image.

if (width  height) {
  resize width to 100
  resize height = height / (int) width/100
} else {
  resize height to 71 
  resize width = width / (int) height/71
}
put resized image in center of 100x71 image.


Curt
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