Whenever I try to load a PNG using SDL_Image's IMG_Load function it gives the error Failed loading libpng16-16.dll:. I have all the right dll's in the right path and I can use other parts of SDL_Image, but for some reason it can't load the libpng dll. How can I fix this? Any help is appreciated.
See my article "SDL2: Loading Images with SDL_image":
If you're going to run from Visual Studio, make sure the image is in the same folder as your main.cpp file; otherwise if you're running straight from the executable, the image should be in the same folder with it.
Needless to say, what I wrote about the image here goes for the DLLs as well.
It appears that libpng16-16.dll has a dependency on zlib1.dll for MinGW-w64 (32-bit). Try to include zlib into your dependnecies--include the DLL in the folder where the executable runs.
The VS do not searches dlls on anywhere except the execution dir, so you probably need to copy that dll to the Debug/ directory on your solution's path.
This link show you how to set up SDL library/libpng16-16.dll to be available for acceess by the compiler.exe (the last step right before the sample code)
yourProgram proprety page -> Builds event-> post-build event
in my case i have
copy “C:\Users\MehdiB\Desktop\C Program\Library\SDL2-devel-2.0.4-VC\SDL2-2.0.4\lib\x86\SDL2.dll” “$(OutDir)SDL2.dll”;
copy “C:\Users\MehdiB\Desktop\C Program\Library\SDL2_image-devel-2.0.1-VC\SDL2_image-2.0.1\lib\x86\SDL2_image.dll” “$(OutDir)SDL2_image.dll”;
copy “C:\Users\MehdiB\Desktop\C Program\Library\dll\libjpeg-9.dll” “$(OutDir)libjpeg-9.dll”
here where you can get this dll
i just replaced zlib1.dll in system32 and SysWOW64 with the one downloaded from https://github.com/OctaForge/OF-Windows/blob/master/bin_win32/zlib1.dll .and worked nicely
来源：https://stackoverflow.com/questions/21472958/sdl-image-img-load-fails-on-png-with-failed-loading-libpng16-16-dll