[Mathias]

Hi,

Whenever I try to load an JPG image in my Felgo game the game crashes with output:

“The program has unexpectedly finished.”

With same image in PNG format it works fine. I did not find anywhere on your website talking about supported formats, but I found out that all your demo games uses PNGs. Is JPG format not supported?

– Mathias

[AlexFelgo Team]

Hi Mathias,

in general jpeg is supported, although png is preferred on mobile devices. Can you provide some more information about your jpg? Are there any special chars or whitespaces in its file name? How are you using your jpg image (some code snippet would be of advantage!). Furthermore on which platform are you developing?

Thanks,

Alex

[ChristianFelgo Team]

Hi Mathias,

loading jpegs should work, although we do not recommend it, because it has major disadvantages in terms of graphics memory and loading times on mobile devices. Thus please use pngs. You could also send us the jpg, so we can try to load it, with the information which OS you are running on.

Cheers, Chris

[Mathias]

Thanks for the fast reply. I tried with different kind of images of different resolution, sizes and file names before i found out that the problem was with the file format. I simply tried to replace the images in one of your demos with my jpg image and it would not build any more.

Here is the code I tried to build locally in my Qt Creator on Ubuntu using Desktop as target:

import VPlay 1.0 // for the gaming components
import QtQuick 1.1 // for the Image element
 GameWindow {
     activeScene: scene
     width: 720
     height: 1280
     Scene {
         id: scene
         anchors.fill: parent
         Image {
             id: bg
             anchors.fill: parent
             source: "img/bg1.jpg"
         }
     }
 }

When exchanging the image to bg1.png it works fine. The reason why i would like to use jpg instead of png for some of the art in my game is that the PNG almost three times larger in filesize than corresponding JPG.

[AlexFelgo Team]

Ok, that’s a rather simple snippet. 😉 As Chris already mentioned, could you please send us the jpg to team@felgo.com so that we’re able to further debug this problem?

Thanks,

Alex

[Mathias]

The problem is same for any JPEG image really, not only the background I created. As soon as I convert the image to PNG it starts working. I have the same problem when trying to build with both Qt 4.7 and Qt 4.8. I sent you the image and my log file so you can try to reproduce the error. I’m using Ubuntu 12.04 and I installed Qt Creator 2.4.1 using your Felgo installer.

I will use PNG for my project for now. Hopefully you will find out what might be causing this problem.

Best Regards,

Mathias

[AlexFelgo Team]

Hi Mathias,

I could not reproduce the crash, both on Mac OS X and on Ubuntu 12. I however noticed (from your sent log output) that your project is probably building against the wrong Qt version. Our SDK comes with Qt 4.8.1, your project however uses 4.7.4 (which is probably pre-installed on your machine). Can you please open the “Projects” tab on the left (while your project is opened in Qt Creator) and ensure that Qt version 4.8.1 is selected (like in this screenshot: http://d.pr/i/woTZ )?

Thanks,

Alex

[Mathias]

I have tried with different versions of the sdk. Unfortunately the problem remains also with version 4.8.1. My workaround has been to use only PNGs for my project.

[AlexFelgo Team]

Hi,

could you please post us a screenshot of the “Project” tab (while your crashing project is opened) within Qt Creator? Seems to be still a configuration issue.

Thanks,

Alex

[Mathias]

Here is a screen of my Project tab:

http://postimg.org/image/vrxkmbhqj/

And here is a screen of the Edit tab with the code i try to run, and the compile output:
http://postimg.org/image/wsjfimfl1/

 

[Mathias]

After some more testing:

The jpg crashing did NOT happen when I build the game for my Harmattan device, only when trying to build on desktop. I have not tried to build for iPhone or android yet but I guess it will work since that is running on your build server.

Here is an other interesting issue I came across when building on desktop:
http://postimg.org/image/3tlp3k2pn/

As you can see the image to the left is rendered correctly. The left image was created using GIMP. I then saved the same image as JPG, reopened it using GIMP and resaved it as a PNG. This image is on the right and you can see when the image is overlapping the image is not rendered correctly. On my Harmattan phone it is how ever rendered as expected, and hopefully on iPhone and Android too.

 

– Mathias

[AlexFelgo Team]

Hi Mathias,

we are currently testing the jpg issue with a fresh installation of Ubuntu 12.04 again and will come back to you as soon as we have some results.

Regarding your second issue: Against which version of Felgo SDK are your currently building (you should find this info in the SDKMaintenanceTool when selecting “Package manager” or “Update components”)? This looks like a minor alpha channel issue which we already fixed with the latest Pro version 1.3.0.

Thanks,
Alex

[AlexFelgo Team]

Hi Mathias,

we tested on a fresh installation again and everything is working as expected with jpgs. We currently suspect an incompatible version of libjpeg on your system (Felgo ships with its own version, but probably a system library gets linked even before ours). Could you please add the following line to the end of your project file, run qmake from the Build menu and post us the Compile output?

message(LIBS: $$LIBS)

Furthermore, could you please run

locate libjpeg

in a terminal an post us the output too?

You can also send us your log output to contact@felgo.com if you do’nt want to post your system’s output her. 🙂

Thanks a lot,

Alex