Using FreeImage DLL in proper way

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Using FreeImage DLL in proper way #424451 06/16/13 14:56 06/16/13 14:56
Joined: Sep 2009 Posts: 987 Budapest Aku_Aku OP User
Aku_Aku OP User Joined: Sep 2009 Posts: 987 Budapest	Hi, i am totally new to using dlls in lite-c. I read the manual but i am still confused. I ask the help of the community, how should use the FreeImage dll in my lite-c project to properly open an image file. Here is the link what i have got: FreeImage Thanks in advance.

Re: Using FreeImage DLL in proper way [Re: Aku_Aku] #424452 06/16/13 15:02 06/16/13 15:02
Joined: Mar 2006 Posts: 1,993 Karlsruhe PadMalcom Serious User
PadMalcom Serious User Joined: Mar 2006 Posts: 1,993 Karlsruhe	Hi, you can't use a DLL in Lite-C as long as it doesn't export functions in the expected way. What you can do is to write a wrapper DLL that uses the functions from FreeImage. Some weeks ago I finished a Gamestudio DLL to use cImg with BMAP*. It is part of TUST so you can easily have a look at the source code: https://github.com/MasterQ32/TUST/tree/master/Library%20Source/ProceduralGS Terrain tutorial using Shade-C amBx-Plugin - use amBx in GameStudio 3D Tower Defence

Re: Using FreeImage DLL in proper way [Re: PadMalcom] #424453 06/16/13 15:07 06/16/13 15:07
Joined: Sep 2009 Posts: 987 Budapest Aku_Aku OP User
Aku_Aku OP User Joined: Sep 2009 Posts: 987 Budapest	Thanks PadMalcolm. I'll see your link. Where can i find the exact description of that "expected way"? Edit: This topic was a little bit detoured to this direction: is a dll eligible to serve lite-c calls. Now back to the original problem. I assume this dll is ok. How should i use in my lite-c program? Last edited by Aku_Aku; 06/16/13 15:16.

Re: Using FreeImage DLL in proper way [Re: PadMalcom] #424455 06/16/13 15:40 06/16/13 15:40
Joined: Apr 2007 Posts: 3,751 Canada WretchedSid Expert
WretchedSid Expert Joined: Apr 2007 Posts: 3,751 Canada	Originally Posted By: PadMalcom Hi, you can't use a DLL in Lite-C as long as it doesn't export functions in the expected way. That's not actually true. The biggest problem is that the Lite-C compiler doesn't create a proper IAT, so the runtime link editor won't do any work for you. However, you can do that manually via LoadLibrary and GetProcAddress. Since we are linking to GitHub projects, here is an example of do something like that: https://github.com/JustSid/Lite-C/tree/master/Bulldozer. Specifically everything starting here Shitlord by trade and passion. Graphics programmer at Laminar Research. I write blog posts at feresignum.com

Re: Using FreeImage DLL in proper way [Re: WretchedSid] #424458 06/16/13 16:00 06/16/13 16:00
Joined: Sep 2009 Posts: 987 Budapest Aku_Aku OP User
Aku_Aku OP User Joined: Sep 2009 Posts: 987 Budapest	What is about this? It seems to really simple. No hocus-pocus... Why should not i use this way? From the Manual Code: void WINAPI myFunction(int i); // declare function prototypeAPI(Test,myDLL) function main() { myFunction(777); // call the DLL function }

Re: Using FreeImage DLL in proper way [Re: WretchedSid] #427963 08/15/13 20:08 08/15/13 20:08
Joined: Sep 2009 Posts: 987 Budapest Aku_Aku OP User
Aku_Aku OP User Joined: Sep 2009 Posts: 987 Budapest	How should i handle when a function gives back something, maybe a boolean value?