std::vector to GLvoid*?

Question

I'm trying to follow this tutorial on OpenGL but instead of loading a raw image I'm using lodePNG.

The problem is that when I cann the function glTexImage2D I get an error on the last argument that it only takes a GLvoid* variable. LodePNG only outputs std::vector as the final image data. I cannot find any other resources on the matter.

How would I go about getting this function to work? The error just simply states it doesn't take this data type.

Not an exact duplicate since you're asking about texture data, but the solution is the same as for this question: http://stackoverflow.com/questions/24048666/opengl-add-vertices/. — Reto Koradi, Jul 14 '14 at 18:35

score 6 · Answer 1 · answered Jul 14 '14 at 18:33

6

vector::data() is your friend.

You will have to pass the raw data from the vector to the glTexImage function.

vector<...> image;
glTexImage2d(..., image.data());

answered Jul 14 '14 at 18:33

Stian Svedenborg

1,797
11
27

You must also check that the template argument of the vector matches what you send in as the `type`-argument – Stian Svedenborg Jul 14 '14 at 18:35
3

Note that the `data()` method was only added with C++11, so it won't be available in older versions of C++. – Reto Koradi Jul 14 '14 at 18:38

std::vector to GLvoid*?

1 Answers1