Thanks for the bug report. I'll look into it next week when I'm back in the office.

Until then, can you post here or email me the macro the makes the gallery? That would help in reproducing the issue.

cheers,
doug.

I just made a macro that resizes 650 images into a lightbox-enabled photo gallery with source images from 8-21MP in size. Two images were not resized. No immediate indication why except that the machine was heavily taxed trying to resize so many at once and may have run out of memory at some point.

This is good news, though - reproducable (after a fashion). I'll work on a simpler case and see about debugging the issue.

Will keep you posted.

cheers,

doug.

Hi Doug

Sorry for the late reply due to work. My source images are around 120k in size and I am dealing with about 350 with each page size of around 36. I am using a simple listview control with a usercontrol inside the template which has it's parameters passed which include all of the required properties for the image. Very simple stuff infact. I can post the code if you wish, however, it does appear that you have a sniff of something already. If you need me to perform any testing for you I am more than happy to do this for you because I can simply drop the updated imagegen in and rerun on a fresh noncached image pile. You have my email address.

Look forward to hearing from you soon.

Regards

Steven

Debugging is challenging because of the random nature. I'm trying to simplify my tests to reproduce it without having to chew through 4.5gig of files but so far it has only happened on my test machine with 600+ images being displayed at one time.

Curiously, if I flush the browser's cache and reload the page (shift-reload the url) I get the properly resized image. A normal page refresh will get a 304 response and use the previously cached image on the browser but a shift-reload will force ImageGen to send the resized images, which works perfectly. As far as I can tell so far, the image is resized properly, the server cache is updated properly, but for some reason the original (rather than resized) image is sent to the browser. 

@Steven, If you run your page with firebug or another response viewer active, you should see the 304 messages on browser reload (when the big image still appears). If you then hold the shift key and reload the page, you should see 200 responses and see the properly resized images. Do you?

cheers,
doug.

Hi Doug

I am not a user of Firebug but installed it for Firefox. When I browse through the pages and I come across one which has not resized simply holding shift and doing a refresh correctly resolves the problem. I then page through and come across another with the same problem. 

Hi, Steven,

Slowly making progress. Thanks for checking; sounds like your behavior is as I expected so that's good. Now to figure out why there is an occassional problem with ImageGen sending the non-resized image. I can only sometimes recreate the problem with more than 500 21-megapixel (10MB) jpgs, all being resized at once. And even then it doesn't happen every time. Debugging is slow that way :)

Will keep you posted.

cheers,
doug.

I'm narrowing in on the problem and may at least have a short-term workaround for you.

Can you add the following to your class to specify the width and height (in addition to maxwidth and maxheight)? That should (*should*) sort it out. 

<Width>175</Width>
<Height>175</Height>

You might also want to specify <AllowUpSizing>false</AllowUpSizing> if there's a chance your original images will be smaller than 175x175 and you don't want ImageGen to enlarge them. Probably not a concern even if upsized since 175 is so small.

Let me know if setting width and height makes a difference for you.

cheers,
doug.

Hi Doug
Thanks for the reply. I have just tried this and it still is exactly the same. My config is now:
 
  <Class Name="1_thumb" OverridesQueryString="false">
    <ImageBaseDir>account</ImageBaseDir>
    <MaxHeight>175</MaxHeight>
    <MaxWidth>175</MaxWidth>
    <Width>175</Width>
    <Height>175</Height>
    <AllowUpSizing>false</AllowUpSizing>
    <Compression>75</Compression>
    <Constrain>true</Constrain>
    <NoCache>false</NoCache>
    <Text></Text>
  </Class>
The actual link into the photo is very simple:
imgPhoto.ImageUrl = "../../ImageGen.ashx?image=" & PhotoPath & FileName & "&class=1_thumb"
The actual user control calling code is:
 
    <asp:Panel runat="server" ID="pnlPhotoGridContainer">
        <asp:ListView ID="lvPhotos" runat="server" DataKeyNames="imageid" DataSourceID="PagerDataSource1" GroupItemCount="3">
            <LayoutTemplate>
                <table cellpadding="0" cellspacing="2" runat="server" id="tblPhotos" width="100%" style="border-left: 1px solid #CFCFCF; border-right: 1px solid #CFCFCF; border-bottom: 1px solid #CFCFCF;" >
                    <tr runat="server" ID="groupPlaceholder"></tr>
                </table>
            </LayoutTemplate>
            <GroupTemplate>
                <tr runat="server" id="photoRow" style="height: 230px;">
                    <td runat="server" id="itemPlaceholder"></td>
                </tr>
            </GroupTemplate>
            <ItemTemplate>
                <td id="Td3" valign="middle" align="center" style="width:300px; background-color: #F4F4F4;" runat="server">
                    <table cellpadding="0" cellspacing="0" border="0" width="100%">
                        <tr>
                            <td valign="middle" align="center" style="height: 200px;">
                                <mow:control_galleryphotosmall ID="control_galleryphotosmall" runat="server" />
                            </td>
                        </tr>
                        <tr>
                            <td  valign="middle" align="center" style="height: 30px; background-color: #E8E8E8;">
                                <div style="text-align: left;">
                                    <div style="width: 100px; font-family: Tahoma; font-size: 0.8em; float: left;">
                                        <span style="margin-left: 5px;"><%# StripExtension(DataBinder.Eval(Container.DataItem, "imagefilename"))%></span>
                                    </div>
                                    <div style="width: 100px; float: right; text-align: right; margin-right: 3px; margin-top: 2px;">
                                    <asp:HyperLink runat="server" ID="lnkPhoto" Visible="false">
                                        <asp:Image runat="server" ID="imgComments" ImageUrl="../images/icons/icon_comments.png" Visible="false" style="cursor:pointer" />
                                    </asp:HyperLink>
                                    </div>
                                </div>
                            </td>
                        </tr>
                    </table>
                </td>
            </ItemTemplate>
            <EmptyItemTemplate>
            <td id="Td4" valign="middle" align="center" style="width:300px; background-color: #F4F4F4;" runat="server">
                &nbsp;
            </td>
            </EmptyItemTemplate>
        </asp:ListView>    
    </asp:Panel>
 
 
I have some code behind which applies properties to the user control during binding which are simply passed down to the control. Nothing special here.
I hope this helps Doug. 
 

Well, there goes that late-night idea! :)

Thanks for trying the width/height settings and also for the code you're using. I'll keep at it and let you know what I find. Now for coffee and more debugging.

cheers,
doug.

Doug also just to let you know that I also get the problem when I am only displaying 6 photos to a page. I simply dropped my paging down to display only 6 per page and eventually it happened on about the 30th page. I was paging through quite quickly.

Cheers Doug. Just emailed you a private link to show you the effect.

Thanks, Steve, it's helpful to see it insitu. Very nice work on the site, by the way!

cheers,
doug.

I think I've found and fixed the problem. I'll email you a new dll shortly for you to test.

Hi Doug,

I am currently experiencing the same issue with a website I'm working on.  Images randomly not being resized at random page loads.

Did you manage to resolve the issue with the new dll?  If so, is it possible to grab a copy of the dll file.

Right, ImageGen 2.5.1 fixes that bug. You can download it from the projects section or the Package Repository. Follow upgrade instructions or (for v2.5 to v2.5.1, copy the imagegen.dll out of the zip file and put it into your site's /bin folder). You will want to delete the 'cached' folders in either case though.

cheers,
doug.

Awesome!  Thanks!

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