obj.h

void immutable_obj::setup_texture(QOpenGLFunctions_4_3_Core *f, const char* filename)
{
  if(strcmp(filename, "") == 0) {
    qDebug() << "Not loading texture's from an empty string";
    return;
  }
  if(!shader_loaded) { qDebug()<<"Shader isn't loaded?"; return; }

  
  f->glGenTextures(1, &texture);
  f->glBindTexture(GL_TEXTURE_2D, texture);
  
  f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER); 
  f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
  f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
  f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

  unsigned char* img = SOIL_load_image(filename, &text_w, &text_h, 0, SOIL_LOAD_RGB);  
  f->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, text_w, text_h, 0, GL_RGB, GL_UNSIGNED_BYTE, img);
  f->glGenerateMipmap(GL_TEXTURE_2D);
  SOIL_free_image_data(img);
  f->glBindTexture(GL_TEXTURE_2D, 0);

  qDebug() << "Set up a texture from " << filename;
}