Re: [PHP] Drawing Images Without Writing To a File
On Thu, 2010-03-11 at 10:27 -0500, Floyd Resler wrote: I want to draw tabs in a tab bar without having to actually write the images to a file. Is it possible to generate the image and send the data back and make the browser think it's loading an image file? I know this can be done by sending the proper headers back for an entire page, but I just want to do basically the same thing for just part of the page. Thanks! Floyd Have the image tag call a script which generates the images based on parameters in the filename: img src=image.php?param1=somethingparam2=something_else/ Then you can have PHP read in the GET data and generate any image you need. Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Drawing Images Without Writing To a File
Floyd Resler wrote: I want to draw tabs in a tab bar without having to actually write the images to a file. Is it possible to generate the image and send the data back and make the browser think it's loading an image file? I know this can be done by sending the proper headers back for an entire page, but I just want to do basically the same thing for just part of the page. Thanks! Floyd I do something similar with my googled webcam :) Then you just use the script as the source for your image (i.e. src=img.php?arguments). Hopefully this is what you are looking for. (Note, this uses the processor pretty heavily when I run 100 images or so). If you are going to reuse the images for many clients, it may be a better alternative to reuse the generated image. ?php header(Content-type: image/jpeg); $file = $_GET[src]; //img/south-lawn1.jpg; $imgfile = img/ . $file; $fsize = filesize($file); $string = South Lawn @ . date(Y-m-d H:i:s, filemtime($file)); $im = imagecreatefromjpeg($file); $color = imagecolorallocate($im, 240, 240, 0); $px = (imagesx($im) - 9.5 * strlen($string)); $py = (imagesy($im) - 24); imagestring($im, 5, $px, $py, $string, $color); imagestring($im, 5, 10, $py, $file, $color); imagestring($im, 5, 10, $py - 16, round(( $fsize / 1024 ),1) . kB, $color); imagejpeg($im); imagedestroy($im); ? === 73, Ken Sande/KC8QNI-T -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Drawing Images Without Writing To a File
sure.. have a seperate php script output the image you want (after doing a header() call to set the mime type to an image; google php header image), and call that on the relevant page via img src='http://yourserver.com/project/imageScript.php?p1=ap2=b;.. but ehm, image creation is bound to be a resource-intensive job.. you may want to cache the images. On Thu, Mar 11, 2010 at 4:27 PM, Floyd Resler fres...@adex-intl.com wrote: I want to draw tabs in a tab bar without having to actually write the images to a file. Is it possible to generate the image and send the data back and make the browser think it's loading an image file? I know this can be done by sending the proper headers back for an entire page, but I just want to do basically the same thing for just part of the page. Thanks! Floyd -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Drawing Images Without Writing To a File
Also you should think about writing those files a memcache or something.
That way the image can expire but you're not wasting a lot of cpu cycles,
aka 500 hits to the site at the same time would be very intensive, but
if someone hit the site 10 minutes ago with a 700 ttl, the would load the
image instantly from ram ;)
Also a method I like is
class thumbnail {
function __construct($baseFileName){
if (!file_exists(THUMBS./.$baseFileName)
$this-generateThumbnail($baseFileName);
return $this-outputThumbContents($baseFileName);
}
function outputThumbContents($sFileName){
//Reads file and echo its header/contents
}
}
Which of course you could make check a memcache location instead or
memcache,file,then build if neither is present. :)
David
-Original Message-
From: Ashley Sheridan [mailto:a...@ashleysheridan.co.uk]
Sent: Thursday, March 11, 2010 9:26 AM
To: Floyd Resler
Cc: PHP
Subject: Re: [PHP] Drawing Images Without Writing To a File
On Thu, 2010-03-11 at 10:27 -0500, Floyd Resler wrote:
I want to draw tabs in a tab bar without having to actually write the
images to a file. Is it possible to generate the image and send the data
back and make the browser think it's loading an image file? I know this can
be done by sending the proper headers back for an entire page, but I just
want to do basically the same thing for just part of the page.
Thanks!
Floyd
Have the image tag call a script which generates the images based on
parameters in the filename:
img src=image.php?param1=somethingparam2=something_else/
Then you can have PHP read in the GET data and generate any image you
need.
Thanks,
Ash
http://www.ashleysheridan.co.uk
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Drawing Images Without Writing To a File
Ken, That's exactly what I want and it works beautifully! I wish I had asked this question a long time ago since, in the past, I have been creating the files and wind up with a bunch of image files hanging around. When building this new site I thought there must be a better way! Thanks! Floyd On Mar 11, 2010, at 10:40 AM, Ken Sande wrote: Floyd Resler wrote: I want to draw tabs in a tab bar without having to actually write the images to a file. Is it possible to generate the image and send the data back and make the browser think it's loading an image file? I know this can be done by sending the proper headers back for an entire page, but I just want to do basically the same thing for just part of the page. Thanks! Floyd I do something similar with my googled webcam :) Then you just use the script as the source for your image (i.e. src=img.php?arguments). Hopefully this is what you are looking for. (Note, this uses the processor pretty heavily when I run 100 images or so). If you are going to reuse the images for many clients, it may be a better alternative to reuse the generated image. ?php header(Content-type: image/jpeg); $file = $_GET[src]; //img/south-lawn1.jpg; $imgfile = img/ . $file; $fsize = filesize($file); $string = South Lawn @ . date(Y-m-d H:i:s, filemtime($file)); $im = imagecreatefromjpeg($file); $color = imagecolorallocate($im, 240, 240, 0); $px = (imagesx($im) - 9.5 * strlen($string)); $py = (imagesy($im) - 24); imagestring($im, 5, $px, $py, $string, $color); imagestring($im, 5, 10, $py, $file, $color); imagestring($im, 5, 10, $py - 16, round(( $fsize / 1024 ),1) . kB, $color); imagejpeg($im); imagedestroy($im); ? === 73, Ken Sande/KC8QNI-T -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
