Native binaries collision with libgdiplus

[tyaleze]

I got the following error when i try to use the library. I have zlib 1.2.11 (latest version) and its dev version installed but i am still getting the same error.

I get success if i use Gdal.Core package and its runtimes. but their version are old.

The detail i got from LD_DEBUG below :

23172: checking for version GLIBC_2.4' in file /lib/x86_64-linux-gnu/libc.so.6 [0] required by file /usr/lib/x86_64-linux-gnu/libgif.so.7 [0] 23172: checking for version GLIBC_2.2.5' in file /lib/x86_64-linux-gnu/libc.so.6 [0] required by file /usr/lib/x86_64-linux-gnu/libgif.so.7 [0]
23172: checking for version GLIBC_2.2.5' in file /lib/x86_64-linux-gnu/libm.so.6 [0] required by file /usr/lib/x86_64-linux-gnu/libpng16.so.16 [0] 23172: checking for version ZLIB_1.2.9' in file /home/tyaleze/Desktop/code/server/teoframework/TeoGIS.Framework/TeoFramework/bin/Debug/netcoreapp3.1/runtimes/linux-x64/native/libz.so.1 [0] required by file /usr/lib/x86_64-linux-gnu/libpng16.so.16 [0]
23172: /home/tyaleze/Desktop/code/server/teoframework/TeoGIS.Framework/TeoFramework/bin/Debug/netcoreapp3.1/runtimes/linux-x64/native/libz.so.1: error: version lookup error: version `ZLIB_1.2.9' not found (required by /usr/lib/x86_64-linux-gnu/libpng16.so.16) (fatal)
23172:
23172: file=/usr/lib/x86_64-linux-gnu/liblibgdiplus.so [0]; destroying link map
23172:
23172: file=/usr/lib/x86_64-linux-gnu/libcairo.so.2 [0]; destroying link map
23172:
23172: file=/usr/lib/x86_64-linux-gnu/libtiff.so.5 [0]; destroying link map

Environment information:

• OS Ubuntu 18.04 TLS
• Package 3.0.1.100
  Dotnet Core 3.1

[MaxRev-Dev]

These packages compiled under and targeting only linux-x64.
Libraries are copied on build from /runtimes/linux-x64/native to output directory.
Are you running on 64-bit machine?
If not - dependencies from the package wont be available on runtime.

Unix packages have their own libz (configured as internal driver) and libc.
Just tested them locally in WSL x64 (Ubuntu 18.04). They are stable.

Screenshots

[tyaleze]

My system is indeed x64

[tyaleze]

asp.zip

This is a sample app. I got error after creating bitmap.

[MaxRev-Dev]

1. You are calling native GDAL methods without configuring drivers paths. This library has a wrapper-bootstrapper to configure GDAL's startup. See how to use.
2. You should call them once at startup as registration is expensive operation and objects are static singletons.
   For me libraries are loading successfully after applying changes.

Also, I want to notice that using bitmap in asp.net core is not a good idea, as it has a windows dependency (Microsoft.Win32.SystemEvents). And it also requires libc6-dev and libgdiplus libraries.
Consider to use ImageSharp

[tyaleze]

Yes i know using bitmap is risky but i am porting a huge library to .net core so i should make it work.

I could not make it work. Could you please send me a working sample project?

Thanks.

[MaxRev-Dev]

@tyaleze Working sample - asp.zip

[tyaleze]

Sorry but i am still getting the error when i try to create Bitmap

[MaxRev-Dev]

@tyaleze GDAL is not dependent on Bitmap and vise versa

[tyaleze]

I know but when i remove the packages it works. If only i add the packages it fails. I tried to use GDAL.Net.Core library and its runtimes it also works.

[MaxRev-Dev]

Then this issue is similar to #9.
In my opinion, It fails because libgdiplus uses libpng16 from system libraries and loads it on startup before gdal.
Currently, I can't find any solution to fix this. Maybe its worth to compile all to separate directory like runtimes/linux-x64/native/gdal.

/home/tyaleze/Desktop/code/server/teoframework/TeoGIS.Framework/TeoFramework/bin/Debug/netcoreapp3.1/runtimes/linux-x64/native/libz.so.1: error: version lookup error: version `ZLIB_1.2.9' not found (required by /usr/lib/x86_64-linux-gnu/libpng16.so.16) (fatal)
23172:
23172: file=/usr/lib/x86_64-linux-gnu/liblibgdiplus.so [0]; destroying link map

[tyaleze]

Thanks for your help. I am using gdal for dynmic tiling. i crop images from big images on runtime. so i understand that if i use ImageSharp or any other cross platform library for creating images, this problem will be solved. right?

[MaxRev-Dev]

@tyaleze sorry for late reply. That should be fixed by ImageSharp, because it does not have any binary dependency - it's fully managed.

[MaxRev-Dev]

asp.zip

This is a sample app. I got error after creating bitmap.

@tyaleze I've tested your pinned project with packages v3.1.2.100. Everything looks fine.

[tyaleze]

Thanks. i took your advise and change all System.Drawing object into ImageSharp. Everything works fine.

[MaxRev-Dev]

@tyaleze One more remark.
I looked through the logs, and there was no collisions with dependencies.
Again, as far as I know our GDAL drivers does not use libgdiplus.
You must install libgdiplus in your environment.
Ubuntu: apt-get install -y libgdiplus
CentOS: yum install -y libgdiplus