Handling Image Half-Loading/Cropping Issue in Visual C++ App

[Devjoe]

Hi all,

I'm working on a Visual C++ application that handles image rendering, and I'm facing an issue where some images are half-loading or appearing cropped within the application. This problem seems to occur randomly across different image formats (JPEG, PNG, etc.). Sometimes the images load perfectly, but other times they are either cut off or not fully displayed.


I have reviewed the code responsible for loading and displaying images, but I haven't been able to identify the cause. I suspect it might be related to memory handling or the way the image buffers are being processed.

Has anyone encountered a similar issue in their Visual C++ projects? If so, what steps or methods did you use to resolve this problem? Any advice on where I should focus my debugging efforts would be greatly appreciated.

Thanks in advance for your help!



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[salem_c]

> I'm working on a Visual C++ application that handles image rendering
Is it
- code you wrote
- code you've been given to work on
- code you "found" on the web
- code spat out by some chatgpt hallucination

Having found an image that breaks, does it always break with that image?

A repeatable bug is so much easier to deal with.


Turn up the warning level to /W4 or /Wall.
https://learn.microsoft.com/en-us/cp...?view=msvc-170
It could so easily be something dumb like an uninitialised variable.
This should be done first, and by default.

Regardless of whether you suspect it's memory related or not, you should definitely use the address sanitizers.
https://learn.microsoft.com/en-us/cp...?view=msvc-170
Do this next. Fix anything in code that you have control over.

Then you can start debugging, if the above didn't find and resolve the issue.

> If so, what steps or methods did you use to resolve this problem?
Same as with any other bug.
You create a debug build and run it in the debugger.
When you step through some code, and reality no longer matches expectation, then you've found a bug.

[Devjoe]

thanks , now I have started to debug and solve the issue!

[salem_c]

Maybe you just need to figure out that C++ != CSS.

https://www.sitepoint.com/community/...s-issue/457089

[nemanfrank]

Hey, can you try these options

Check Memory Allocation

Image Loading

Rendering Issues

Threading: If you?re using multi-threading, check for race conditions where the image might be accessed before fully loading.

Debugging: Add logs to track image dimensions and buffer sizes and use breakpoints to check memory during loading.

I hope this will help you.......