c++ - GL_INVALID_OPERATION in glGenerateMipmap(incomplete cube map) -

i'm trying learn opengl , i'm using soil load images.

i have following piece of code:

gluint texid = 0;  bool loadcubemap(const char * basefilename) {      glactivetexture(gl_texture0);      glgentextures(1, &texid);     glbindtexture(gl_texture_cube_map, texid);      const char * suffixes[] = { "posx", "negx", "posy", "negy", "posz", "negz" };     gluint targets[] = {         gl_texture_cube_map_positive_x, gl_texture_cube_map_negative_x,         gl_texture_cube_map_positive_y, gl_texture_cube_map_negative_y,         gl_texture_cube_map_positive_z, gl_texture_cube_map_negative_z     };      (int = 0; < 6; i++) {         int width, height;         std::string filename = std::string(basefilename) + "_" + suffixes[i] + ".png";         std::cout << "loading: " << filename << std::endl;                 unsigned char * image = soil_load_image(filename.c_str(), &width, &height, 0, soil_load_rgb);         if (!image) {             std::cerr << __function__ << " cannot load image " << filename << " (" << soil_last_result() << ")" << std::endl;             return false;         }         glteximage2d(gl_texture_2d, 0, gl_rgb, width, height, 0, gl_rgb, gl_unsigned_byte, image);         soil_free_image_data(image);     }      gltexparameteri(gl_texture_cube_map, gl_texture_mag_filter, gl_linear);     gltexparameteri(gl_texture_cube_map, gl_texture_min_filter, gl_linear_mipmap_linear);     gltexparameteri(gl_texture_cube_map, gl_texture_wrap_s, gl_clamp_to_edge);     gltexparameteri(gl_texture_cube_map, gl_texture_wrap_t, gl_clamp_to_edge);     gltexparameteri(gl_texture_cube_map, gl_texture_wrap_r, gl_clamp_to_edge);     glgeneratemipmap(gl_texture_cube_map);      glbindtexture(gl_texture_cube_map, 0);     return true;  } 

when call this, images load successfully, error in console:

---- ogl debug ---- message <1>: 'api' reported 'error' 'high' severity:  gl_invalid_operation in glgeneratemipmap(incomplete cube map) ---- backtrace ---- 

and no cubemap displaying @ all. see mistake in code?

you never specify texture image cube map faces. instead call glteximage2d on gl_texture_2d target of cube faces.