Contributions
'On the Fly' Auto Thumbnailer using GD Library
This modification uses the GD 2 image library, which now comes packaged with most PHP builds, to dynamically generate your product image thumbnails on the fly. It works with GIFs, JPGs and PNGs, produces much smaller thumbnail file sizes (saving bandwidth), maintains the proper ratio of your pics, and does not create any extra files on your server.
Easy installation involves adding only one file and updating the tep_image function. It should work with osC 2.1-2.2
Unfortunately, transparencies are not supported as of this release. GIF creation was disabled in the GD Library due to licencing issues with Compuserve (Gifs are thumbnailed as JPGs), and I haven't got the PNG transparencies quite worked out.
Expand All / Collapse All
Fixed the internal server error 500 that occurs if fastcgi is used on a webserver.
Therefore, I have replaced two lines of the new file product_thumb.php:
header("Status: 304 Not Modified");
header($httpProtocol . " 304 Not Modified");
With the following code:
if (substr(php_sapi_name(), 0, 3) == 'cgi') {
header("Status: 304 Not Modified");
} else {
header($httpProtocol . " 304 Not Modified");
}
Fore more details about this bug see http://bugs.php.net/bug.php?id=36705
This fixes a minor issue with the palette.
You can now set the transparency color via the background matte color. You will want to pick something that's not in the palette so that you don't have too much becoming transparent.
This is based on On the fly Auto Thumbnailer 2.4 fix 3.
For some reason, GIF files were blocked from using $use_truecolor. Yes, I'm aware that GIF only supports 256 colours; however, the palette can be selected from a full 24bit selection. As a result, previous versions would not resample GIF images properly and you would see blocky edges.
I basically reallowed truecolour use from GIF images (you'll notice a big difference if you're resampling). I also put in more flexible transparency support. (To do this, I had to move the loading of the images to slightly earlier in the code.)
If you have transparent GIF's or any GIF's for that matter, try this out and see if you notice a difference.
(note: only chaged the one for the main catalog, not the one in the admin dir)
Feedback to
jgryn AT
cse DOT
yorku DOT
ca
in the File includes/functions/html_output.php in the function tep_image there is a check if the image size should be calculated:
// Do we calculate the image size?
if (CONFIG_CALCULATE_IMAGE_SIZE [...] )
This check is incorrect because in the admininterface the CONFIG_CALCULATE_IMAGE_SIZE is set to "true" or "false"(both strings!) and therefor this part of the check is everytime valid!
it should read:
if(CONFIG_CALCULATE_IMAGE_SIZE == "true" [...]
I found out today, that if you have the "Anti Robot Registration Validation 1.0 + images
" found at http://addons.oscommerce.com/info/1237 installed, then the validation image will not work, instead it will show the no image.gif
This can be fixed, but it does remove the default no image function.
I simply navigated to catalog/includes/functions/html_output.php under the new function introduced with "on the fly thumbnailer using GD library" called "the html image wrapper function" find:
if no file exists display the 'no image' file
if (!is_file($src)) {
$src = "images/no_image.jpg";
}
and change to:
// if no file exists display the 'no image' file
//if (!is_file($src)) {
//$src = "images/no_image.jpg";
//}
//above commented code breaks validation code when enabled!!
This is just a workaround that works for me, Im not a programmer of php, if anyone can fix this so it also works with the no image function too, then it will be great!
'On the Fly' Auto Thumbnailer using GD Library Version 2.4 fix 3
Change:
- Corrected a minor error in the included admin/categories.php
This, for convenience, is the complete contrib but if you've already downloaded 2.4 fix 2, you don't need this. You only need to go to admin/categories.php and find this line:
if (($HTTP_POST_VARS['delete_image'] == 'yes') {
Just delete the first bracket, leaving:
if ($HTTP_POST_VARS['delete_image'] == 'yes') {
Corrected a minor error in the included admin/categories.php. This, for convenience, is the complete contrib but if you've already downloaded Thumbnailer 2.4 fix 2, you don't need this. Just go to admin/categories.php, find this line:
if (($HTTP_POST_VARS['delete_image'] == 'yes') {
Just remove the first bracket, leaving:
if ($HTTP_POST_VARS['delete_image'] == 'yes') {
'On the Fly' Auto Thumbnailer using GD Library Version 2.4 fix 2
Changes:
- Corrected the including files (admin/categories.php) because the old version also includes code fragments from other contributions that cause problems when these contributions are not installed.
- Updated the readme.html file.
Copyright 2008 Erik "Grinse" Fuhrmann
'On the Fly' Auto Thumbnailer using GD Library Version 2.4 fix
Changes:
- Corrected the including files because the old version also includes code fragments from other contributions that cause problems when these contributions are not installed.
Copyright 2008 Erik "Grinse" Fuhrmann
'On the Fly' Auto Thumbnailer using GD Library Version 2.4
Changes:
- Added possibility to remove image from product and delete image from server.
- Disabled default image (no_image.gif) option for admin section because it's not working the right way.
- Added a preview button in admin/categories.php.
Copyright 2008 Erik "Grinse" Fuhrmann
On my installation the default image was showing for images outside the /images folder. .root/icons/warning.gif on the Message Stack was being converted into the NO IMAGE jpg even if the .gif file is in its place.
This file is only the tep_function for functions/html_output.php with the default image disabled
If THUMBNAIL_ALLOW_LARGER configuration parameter is set to "false" and desired image is bigger than original, the product_thumb.php works Ok, making a copy of original image so avoiding pixelate it.
But tep_image function creates an <IMG> tag with the WIDTH and HEIGHT desired attributes, not the original ones, so you will see a pixelated image anyway. This contribution is intended to solve this problem: if image will not be resized to a larger one, <IMG> tag will include original size of image.
This contribution is only for those who want not to resize from small to bigger images. Please, do not install if you prefer to let them to resize.
This mod does two things:
1. Prevents the default image from displaying when "Images Required" is set to false.
2. Allows you to set the filename (including path) from configure.php (you can do it in filenames.php as well, if you like. Whatever makes more sense to you)
great contib but manufacturer images are not processed from tep_image function, i foudn simple fix for this problem.
includes/boxex/manufacturer_info.php
find:(about line 28)
if (tep_not_null($manufacturer['manufacturers_image'])) $manufacturer_info_string .= '<tr><td align="center" class="infoBoxContents" colspan="2">' . tep_image(DIR_WS_IMAGES . $manufacturer['manufacturers_image'], $manufacturer['manufacturers_name']) . '</td></tr>';
replace with:(i assigned default size for manufactuer image from here . someone can implement for admin control)
if (tep_not_null($manufacturer['manufacturers_image'])) $manufacturer_info_string .= '<tr><td align="center" class="infoBoxContents" colspan="2">' . tep_image(DIR_WS_IMAGES . $manufacturer['manufacturers_image'], $manufacturer['manufacturers_name'], 100,100) . '</td></tr>';
just changed &w and &h to &w and &h to make it W3C capable
Added a couple of lines of code to product_thumb.jpg to address an error where visitors can resize images at will to huge dimensions and eat up your server resources. Note, now if you try to make the image x4 or greater sized than the original you will get a broken image. This is to address security concerns and to prevent server resources from being wasted, this is intential.
Rewrote the install directions to make installation simpler and less confusing.
FULL VERSION
SUPPORT FORUM:
http://forums.oscommerce.com/index.php?showtopic=166150
http://mysite.domain/catalog/product_thumb.php?img=images/somerealpicture.jpg&w=1000000000&h=10000000000
This package includes everything you need.
I have fixed a problem with the "2.3 Full Package + minor readme text adjustment" version step #13 as it was structured improperly and created the images to be missing in the admin panel!
It had read:
Find this (25):
define('DIR_WS_CATALOG_IMAGES', 'images/');
Replace it with this:
define('DIR_WS_CATALOG_IMAGES', '../images/');
When it should have read:
Find this (13):
define('DIR_WS_CATALOG_IMAGES', DIR_WS_CATALOG . 'images/');
Replace it with this:
define('DIR_WS_CATALOG_IMAGES', '../images/');
Had you just edited the ../ part as it indicated was all was that needed, you would have been leaving the "DIR_WS_CATALOG ." snippet which would break the purpose of the script. I also fixed the line number to 13 from 25.
If you use an older version, and you have problems with images not showing up in your admin panel, this fix should solve your woes.
in product_thumb.php there was an outdated reference to readme.txt, now changed the text to readme.html
Version 2.3 by psynaptic
- Merged '2.2.1 Minor Admin Update (SQL Only)' update by psynaptic (25.3.07).
- Merged '2.2.2 Catalog product_thumb bug fixed' update by josua (14.04.07).
This update correct a bug in the product_thumb Catalog file.
Without this fix you will not be able to see the product images but just create them.
Here is the fix:
// create thumbnail directory if does not exist
//$tmp_path = str_replace(basename($filename), '', $filename);
//if (is_dir($tmp_path) == false) mkdir($tmp_path);
function modify_tn_path($file)
.......
As you can see the $filename variable isn't yet assigned in this point of the code and so the code fails.
Sorry for my english I hope you have understood what I have made. However I have attached the patched file so you have just to replace this in your catalog (or root) directory.
Bye
This update simply changes the true/false options in admin to radio fields (rather than text input as they are now).
Just run the .sql file on your database.
Version 2.2 by psynaptic
- Merged 'Control compression of thumbnailed images' update by idolcemia (29.10.06).
- Merged 'Default image' update by dannet (09.04.06).
- Added no_image.jpg for use as default image.
- Added full admin control of the configuration settings.
- Added 'Control more image sizes from admin' bonus tip.
- Added gdtest.php to show which components and version of the GD Library is installed on your server.
- Fixed the readme document's HTML/CSS code. It now validates and is cross-browser compatible.
- Some of the readme document has been rewritten including full syntax highlighting based on php.net
Based on nate_02631's 15 Dec 2005
Much like new tep_image() function in catalog/includes/functions/html_output.php
Just replace tep_image() function in catalog/admin/includes/functions/html_output.php with
function tep_image($src, $alt = '', $width = '', $height = '', $params = '') {
// Set default image variable and code
$image = '<img src="' . $src . '"';
// Don't calculate if the image is set to a "%" width
if (strstr($width, '%') == false || strstr($height, '%') == false) {
$dont_calculate = 0;
} else {
$dont_calculate = 1;
}
// Do we calculate the image size?
if (CONFIG_CALCULATE_IMAGE_SIZE && !$dont_calculate) {
// Get the image's information
if ($image_size = @getimagesize($src[0] == '/' ? '..' . $src : $src)) {
$ratio = $image_size[1] / $image_size[0];
// Set the width and height to the proper ratio
if (!$width && $height) {
$ratio = $height / $image_size[1];
$width = intval($image_size[0] * $ratio);
} elseif ($width && !$height) {
$ratio = $width / $image_size[0];
$height = intval($image_size[1] * $ratio);
} elseif (!$width && !$height) {
$width = $image_size[0];
$height = $image_size[1];
}
// Scale the image if larger than the set width or height
if ($image_size[0] > $width || $image_size[1] > $height) {
$rx = $image_size[0] / $width;
$ry = $image_size[1] / $height;
if ($rx < $ry) {
$width = intval($height / $ratio);
} else {
$height = intval($width * $ratio);
}
$image = '<img src="../product_thumb.php?img=' . ($src[0] == '/' ? substr($src, 1) : $src) . '&w=' . tep_output_string($width) . '&h=' . tep_output_string($height) . '"';
}
} elseif (IMAGE_REQUIRED == 'false') {
return '';
}
}
// Add remaining image parameters if they exist
if ($width) $image .= ' width="' . tep_output_string($width) . '"';
if ($height) $image .= ' height="' . tep_output_string($height) . '"';
if ($params != '') $image .= ' ' . $params;
$image .= ' border="0" alt="' . tep_output_string($alt) . '"';
if ($alt) $image .= ' title="' . tep_output_string($alt) . '"';
$image .= '>';
return $image;
}
I found my clients uploading BMP files and also putting '&' symbols in filenames.
I needed to reduce the size of the the thumbnail images in order to control the size of my pages. (It helped a lot!)
After spending some time trying to figure out which version of this package is currently "definitive", which I should modify to provide in its entirety here, I eventually gave up and chose simply to submit my instructions for this modest 2-step fix.
If you want to add a default image for the products that dont have images, you have to add the code:
if (! is_file($src)) {
$src = "images/xxx.jpg";}
where xxx is the name of your image
just after the function tep_image begin
(function tep_image($src, $alt = '', $width = '', $height = '', $params = '') {
and this code )
I change how $pathSep work on win32 server by replace
$pathSep = "/"; //$pathSep = strstr(PHP_OS, "WIN") ? "\" : "/";;
and also add functionality to automatically create 'thumbnails' directory if it is not exist; please test this function on unix/linux server.
// create thumbnail directory if not exist.
$tmp_path = str_replace(basename($filename), '', $filename);
if (is_dir($tmp_path) == false) mkdir($tmp_path);
when delete a catalog the addtional images not remove form the database.
in general.php
function tep_remove_product()
add tep_db_query("delete from " . TABLE_ADDITIONAL_IMAGES . " where products_id = '" . (int)$product_id . "'");
no file upload
Included the updated install instructions. Did not include the 2.1.2a because it failed to work on my setup (linux / apache).
Updated tep_image in the readme.html to address the following:
Fixed problem with tep_image where $src having images with with spaces in the filename would create screwy query strings to the products_thumb.php and gave me broken images.
Fixed a problem with tep_image where image src's with wacky characters in $src and resize code is not to be run (set in top of function). Spaces or other illegal characters in filenames could become part of the URL. Most newer browsers do the conversions automagically (space to %20 for instance) when requesting the image so it's pretty minor, but this is sloppy to say the least. This bug also exists in the stock tep_image function that ships with oscommerce.
Just reposting in case anyone is confused - the last *sanctioned* version of this contrib is 1.5, which does not include caching, etc...
The others that follow were added with no coordination with the original author and should have been started as distinct contributions...
UPDATES IN VERSION 1.5
Version 1.5 adds *transparency* support and support for older versions of the GD library. Your PHP's GD library can be configured a number of different ways, but in general, the following holds true: Versions after 1.6 generally include GIF read support as well as PNG support. Thus, if you have GD < 1.6 you will not be able to thumbnail PNG images. If you have GD > 1.6, you can scale GIF images, but they will be output as either PNG (default) or JPGs, depending on the product_thumb.php configuration settings.
A bug with product names containing aspostrophes was fixed.
Minor streamlining of the code and comments were added.
A check to see if the thumbnail dimensions being passed to the thumbnailer are greater that the size of the original image. In which case, the image will not be output. (A security feature to mitigate DOS (Denial of Service) attacks with users calling the thumbnailer directly with very large width/height values.)
If you are upgrading, replace both your product_thumb.php and the tep_image function with the new ones.
A new support thread has been started here:
http://forums.oscommerce.com/index.php?showtopic=112231
Questions, comments, etc... are welcome
Small correction in instructions
Step #10 - In /catalog/admin/includes/configure.php
replace code (around line 25)
Originally the instructions say:
define('DIR_WS_CATALOG_IMAGES', 'images/');
replace with
define('DIR_WS_CATALOG_IMAGES', '../images/');
on M2 it looks like this
define('DIR_WS_CATALOG_IMAGES', DIR_WS_CATALOG . 'images/');
replace with
define('DIR_WS_CATALOG_IMAGES', '../images/');
Hi Folks,
i had Problems to get the Admin Thumbnailing to run (Windows Server). I Included DIR_FS_CATALOG (absolute path Variable) to fix errors with all file-actions.
Thank´s for this great addon!
INSTALL:
read included file.
- Fixed a bug of browser-caching option not being used
- Added status http-header for more compatibility with other servers
- Restyled and recoded browsercaching-mechanism
- Completely rewritten readme in an html-version for better reading
If you have questions or suggestions, please leave them in the Contribution Support Forum: http://forums.oscommerce.com/index.php?showtopic=166150
Are your thumbnails cluttering your images-directory?
In this version you may configure a subdirectoy where to store all the cached thumbnails.
When you install, please make sure that the default subdirectory (thumbnails) exists in both /catalog/images and /catalog/admin/images. If you have a sub-categorized images directory, create the thumbnails-directory within *every* sub-directory of images (also mentioned in readme)
Are your thumbnails cluttering your images-directory?
In this version you may configure a subdirectoy where to store all the cached thumbnails.
When you install, please make sure that the default subdirectory (thumbnails) exists in both /catalog/images and /catalog/admin/images (also mentioned in readme)
Fix for new thumbnails that were not created.
Added browser caching capabilities to the thumbnails. This results in less bandwidth consumption and faster access to your store(s).
Also works when server-caching of thumbnails is disabled.
Please share your results here: http://forums.oscommerce.com/index.php?showtopic=164623
This FULL PACKAGE fixes the pixel bug.
Quick and easy fix for 'pixel' image bug. I am not a programmer but this fix worked for me.
This is a simple solution inspired by hours of searching.
Maybe you can improve it with a better idea.
Many thanks for those that have made this contribution available.
All I did was put in another filter that tells function tep_image() not to resize images with the word 'pixel' in them.
In includes/functions/html_output.php FIND:
// Don't calculate if the image is set to a "%" width
if (strstr($width,'%') == false || strstr($height,'%') == false) {
$dont_calculate = 0;
} else {
$dont_calculate = 1;
}
AFTER ADD:
// Don't calculate if image has "pixel" in its name
if (strstr($image,'pixel') == false || strstr($image,'pixel') == false) {
$dont_calculate = 0;
} else {
$dont_calculate = 1;
}
// Let just hope your store doesn't sell pixels! :)
Quick and easy fix for 'pixel' image bug. I am not a programmer but this fix worked for me. This is a simple solution inspired by hours of searching. Maybe you can improve it with a better idea. Many thanks for those that have made this contribution available.
All I did was put in another filter that tells function tep_image() not to resize images with the word 'pixel' in them.
in includes/functions/html_output.php FIND:
// Don't calculate if the image is set to a "%" width
if (strstr($width,'%') == false || strstr($height,'%') == false) {
$dont_calculate = 0;
} else {
$dont_calculate = 1;
}
// AFTER ADD:
// Don't calculate if image has "pixel" in its name
if (strstr($image,'pixel') == false || strstr($image,'pixel') == false) {
$dont_calculate = 0;
} else {
$dont_calculate = 1;
}
// Let just hope your store doesn't sell pixels! :)
Restored the tep_image function so that the } removed by the previous contributor has been restored (code was breaking)
Also updated product_thumb.php so that the arguments to function_exists() are encapsulated in quotes so they don't cause a notice.
i have cancelled a "extra" '}' in the "Replace your function tep_image code with the code below" that cause error of mi site.
Use this full package.
UPDATES IN VERSION 1.9:
bugfixes:
- the alt and title tags were generated with three space characters (a mouse over showed a blank notice on all pictures in the store)
- bugfix of Tony Briers is included
Complete Package!
The width and height attributes of the image created by the following code means that smaller thumbnail images are scaled by the browser to the dimensions SMALL_IMAGE_WIDTH and SMALL_IMAGE_HEIGHT.
"catalog/product_info.php" lines 123 and 135 in my install.
123:
<?php echo '<a href="' . tep_href_link(DIR_WS_IMAGES . $product_info['products_image']) . '" target="_blank">' . tep_image(DIR_WS_IMAGES . $product_info['products_image'], $product_info['products_name'], SMALL_IMAGE_WIDTH, SMALL_IMAGE_HEIGHT, 'hspace="5" vspace="5"') . '<br>' . TEXT_CLICK_TO_ENLARGE . '</a>'; ?>
132:
document.write('<?php echo '<a href="javascript:popupWindow('' . tep_href_link(FILENAME_POPUP_EXTRA_IMAGES, 'peiID=' . $extra_images['products_extra_images_id']) . '')">' . tep_image(DIR_WS_IMAGES . $extra_images['products_extra_image'], addslashes($product_info['products_name']),SMALL_IMAGE_WIDTH, SMALL_IMAGE_HEIGHT, 'hspace="5" vspace="5"') . '<br>' . TEXT_CLICK_TO_ENLARGE . '</a>'; ?>');
135:
<?php echo '<a href="' . tep_href_link(DIR_WS_IMAGES . $extra_images['products_extra_image']) . '">' . tep_image(DIR_WS_IMAGES . $extra_images['products_extra_image'], $product_info['products_name'], SMALL_IMAGE_WIDTH, SMALL_IMAGE_HEIGHT, 'hspace="5" vspace="5"') . '<br>' . TEXT_CLICK_TO_ENLARGE . '</a>'; ?>
These dimensions are useful for page layout. My solution is to create a blank thumbnail with the smaller original image centered upon it. This requires two changes to "catalog/product_thumb.php":
Lines 72 and 73
$_GET['w'] = $image[0];
$_GET['h'] = $image[1];
are commented out to become:
// $_GET['w'] = $image[0];
// $_GET['h'] = $image[1];
and before (about line 168) :
// Scale the image based on settings:
if (function_exists(imagecopyresampled) && $use_resampling)
{
insert the code:
if (empty($allow_larger) && ($_GET['w'] > $image[0] || $_GET['h'] > $image[1]))
{
// existing image is smaller than thumbnail so create the thumbnail with the smaller original image centred on it
$dx = ($_GET['w'] - $image[0]) / 2;
$dy = ($_GET['h'] - $image[1]) / 2;
imagecopy($tmp_img, $src, $dx, $dy, 0, 0, $image[0], $image[1]);
} else
Tone.
bug fixes to :
- make the beast behave when the images are actually smaller than the thumbs
(requires changes in html_output and product_thumbs)
- make use_truecolor behave in presence of gifs, notably pixel_trans*
Also added code to detect when the thumbs are older than the pictures, so it recreates the thumbs in that case. No need to delete thumbs when the pictures are changed anymore.
Note that it still needs some kind of "garbage collection" because if the proportions change between the original picture and the new one, the old thumbs will stay around. This doesn't impact the system, but will clutter your disk over time. A simple cron job takes care of it, I'll try to
implement it in php if I have time.
There was a (small) bug in product_thumbs which prevented gif images from displaying. This is a complete fixed package.
With the recent updates, like others, I got tired of trying to track down which file/files needed to be downloaded.
Since I myself did not create this mod, I decided to pay it forward and repackage all the updates from 1.5 to current. This is just a streamlined repack. All credit goes to Nate Welch and every other contributor since.
After the wc3 validator support was added, I upped the version to 1.7. Including the (much needed) improved instructions, I designated it to 1.7.1.
This package has been tested successfully on my dev server.
I ran my page through the wc3 validator and it complained about unencoded ampersands so i modified the code to use & in the image links.
enjoy. fantastic module btw the caching really works sweet.
Available at: http://forums.oscommerce.com/index.php?showtopic=140340&st=0&p=570398&#entry570398
If you followed the instructions:
1) You need to change you tep_image() function definition located in admin/includes/functions/html_output.php the same way you did for includes/functions/html_output.php
2) You need to change your configure file for admin located at admin/includes/configure.php
Code:
CODEdefine('DIR_WS_CATALOG_IMAGES', DIR_WS_CATALOG . 'images/'); // old line
to
CODEdefine('DIR_WS_CATALOG_IMAGES', '../images/'); //new line
Note: this done for the reason that getimagesize() might fail to work inside modified tep_image() function, especially in the case of SSL protected areas
I will still need advice of Community on doing this in terms of possible security problems.
3) Finally you need to !!!!! VERY IMPORTANT !!!! copy "product_thumb.php" into admin folder
 1.6 |
Pallieter Koopmans |
5 Nov 2004 |
|
Added error checking and multiple image size support.
This is my first contibution (better known as a 'hack'). I just combined the caching code to the most recent release. I also made it an option so you can just enable it. This is my quick fix to an issue I was having.
Enjoy,
Marcello
UPDATES IN VERSION 1.5
Version 1.5 adds *transparency* support and support for older versions of the GD library. Your PHP's GD library can be configured a number of different ways, but in general, the following holds true: Versions after 1.6 generally include GIF read support as well as PNG support. Thus, if you have GD < 1.6 you will not be able to thumbnail PNG images. If you have GD > 1.6, you can scale GIF images, but they will be output as either PNG (default) or JPGs, depending on the product_thumb.php configuration settings.
A bug with product names containing aspostrophes was fixed.
Minor streamlining of the code and comments were added.
A check to see if the thumbnail dimensions being passed to the thumbnailer are greater that the size of the original image. In which case, the image will not be output. (A security feature to mitigate DOS (Denial of Service) attacks with users calling the thumbnailer directly with very large width/height values.)
If you are upgrading, replace both your product_thumb.php and the tep_image function with the new ones.
A new support thread has been started here:
http://forums.oscommerce.com/index.php?showtopic=112231
Questions, comments, etc... are welcome
i made a little change on product_thumb.php in order to save the rescaled picture after the first request.
for example if the picture is named: test.jpg at the first request of a thumbnailed version of that picture it will create the test.jpg.thumb.jpg (i like dots ! ^_^) on any subsequent requests product_thumb.php won't rescale it again but it will simply send the already scaled file.
if you change the original picture you need to delete manually the thumbnailed version.
hope to help.
comments welcome.
i made a little change on product_thumb.php in order to save the rescaled picture after the first request.
for example if the picture is named: test.jpg at the first request of a thumbnailed version of that picture it will create the test.jpg.thumb.jpg (i like dots ! ^_^) on any subsequent requests product_thumb.php won't rescale it again but it will simply send the already scaled file.
if you change the original picture you need to delete manually the thumbnailed version.
hope to help.
comments welcome.
This version fixes a glitch with respect to 100% scaled images (such as the pixel_black and transparent images), adds a "title" alt tag to images and adds resampling (mentioned below) for cleaner scaled images.
The full install is here which involves adding just one file and replacing the tep_image function in includes/functions/html_output.php with the function in the readme.txt
AND A BONUS TIP: Make an intermediate-sized image for the product info page by adding a "multiplier" to the SMALL_IMAGE_WIDTH & SMALL_IMAGE_HEIGHT values in product_info.php
For example, to make the image on the product info page twice as large as the thumbnail, replace the values with:
(SMALL_IMAGE_WIDTH*2) and
(SMALL_IMAGE_HEIGHT*2)
Of course, any image smaller than that will be stretched to fit! (There are *two* occurences each of WIDTH/HEIGHT so be sure to change them both!)
Thanks for a great contribution Nate!....
Please see the forum Q&A here...(instead of posting on this page) ;)
http://forums.oscommerce.com/index.php?act=ST&f=7&t=101007
Thanks Nate!
And..thanks for the quality improvement! Will it "significantly" use more server resources????
Thumbnail quality can be improved greatly by changing the "imagecopyresized" function in product_thumbs.php to "imagecopyresampled" (takes a little more server juice). A modified product_thumb.php is attached as a download - though be sure to apply the original changed tep_image function as described in the first post.
Since the "pixel_black", transparent pixels and others are not run through this script (check the page source), I don't see what effect this mod could have on them.
GIF enabling is not possible because only GIF reading is enabled in the GD 2 library due to aforementioned lisensing issues. The mod *does* read and resize GIFs, outputting them as JPGs - making for smoother scaling (esp. with above resampling). Remember that the default background color can be changed from white to something else, if preferred.
Thanks for a great contrib Nate!
But...it messes up the "pixel black" line on the product listings...and the "tooltips" on certain gif, and jpg pics on the site.....
Also..can you improve the quality of the thumbnails?...they're really bad at small sizes...not so bad at product info sizes..around 200x200....
That would be great!....Also...how can Gif be enabled?
Thanks!
This modification uses the GD 2 image library, which now comes packaged with most PHP builds, to dynamically generate your product image thumbnails on the fly. It works with GIFs, JPGs and PNGs, produces much smaller thumbnail file sizes (saving bandwidth), maintains the proper ratio of your pics, and does not create any extra files on your server.
Easy installation involves adding only one file and updating the tep_image function. It should work with osC 2.1-2.2
Unfortunately, transparencies are not supported as of this release. GIF creation was disabled in the GD Library due to liscencing issues with Compuserve (Gifs are thumbnailed as JPGs), and I haven't got the PNG transparencies quite worked out.
Note: Contributions are used at own risk.
On the fly Auto Thumbnailer 2.4 fix 4