Issue loading images with stb_image

Question

I want to load images using stb_image. I downloaded stb_image.h from https://github.com/nothings/stb. When I run the code:

string file="image.png";
int width,height,components;

unsigned char *imageData = stbi_load(file.c_str(),
        &width, &height, &components, STBI_rgb_alpha);

i get the following errors:

Main.cpp:(.text+0xa14): undefined reference to `stbi_load'
Main.cpp:(.text+0xb74): undefined reference to `stbi_image_free'

You should really read the documentation of the libraries you are using. Just `#include "stb_image.h"` is _not_ enough... — derhass, Jun 18 '17 at 17:36

score 29 · Accepted Answer · edited Apr 24 '21 at 17:37

29

You probably should add: #define STB_IMAGE_IMPLEMENTATION to your code before the include. This is suggested in one of the first lines of the header file.

edited Apr 24 '21 at 17:37

BDL

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answered Jun 18 '17 at 17:53

D.J. Klomp

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It worked! Now I can compile it but when I try loading an image the program crashes, any ideas? – Roy Varon Jun 18 '17 at 18:00
What is the error with which the program crashes? – D.J. Klomp Jun 18 '17 at 18:04
I get a Segmentation fault. but it was caused by the next line: glTextureParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); – Roy Varon Jun 18 '17 at 18:19
`glTextureParameteri` is a GL 4.5 function which must be loaded via the GL extension mechanism, and you are even using it wrong. You are probably looking for `glTexParameteri` – derhass Jun 18 '17 at 18:30
Thank you so much it works perfectly now! – Roy Varon Jun 18 '17 at 18:42

Issue loading images with stb_image

1 Answers1