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.
>
>
> 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($im);
>
> ?>
>
> ===
>
> 73,
> Ken Sande/KC8QNI-T
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RE: [PHP] Drawing Images Without Writing To a File
Also you should think about writing those files a memcache or something.
That way the image can expire but you're not wasting a lot of cpu cycles,
aka 500 hits to the site at the same time would be very intensive, but
if someone hit the site 10 minutes ago with a 700 ttl, the would load the
image instantly from ram ;)
Also a method I like is
class thumbnail {
function __construct($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:
Then you can have PHP read in the GET data and generate any image you
need.
Thanks,
Ash
http://www.ashleysheridan.co.uk
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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 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
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. 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
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: Then you can have PHP read in the GET data and generate any image you need. Thanks, Ash http://www.ashleysheridan.co.uk
[PHP] Drawing Images Without Writing To a File
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
