Hello forum,


I am having the following compilation error:

Qt Code: 
  1. Model.cpp:233: error: 'glGenerateMipmap' was not declared in this scope
  2.             glGenerateMipmap(GL_TEXTURE_2D);
  3.                                           ^
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I have a Model class with a member function to generate texture object.


Qt Code: 
  1. GLint Model::TextureFromFile(const char* path, string directory, bool gamma)
  2.         {
  3.             //Generate texture ID and load texture data
  4.            string filename = string(path);
  5.            filename = directory + '/' + filename;
  6.            GLuint textureID;
  7.            glGenTextures(1, &textureID);
  8.            int width,height;
  9.            unsigned char* image = SOIL_load_image(filename.c_str(), &width, &height, 0, SOIL_LOAD_RGB);
  10.            // Assign texture to ID
  11.            glBindTexture(GL_TEXTURE_2D, textureID);
  12.            glTexImage2D(GL_TEXTURE_2D, 0, gamma ? GL_SRGB : GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
  13.            glTexParameteri(GL_TEXTURE_2D,GL_GENERATE_MIPMAP,GL_TRUE);
  14.  
  15.             glGenerateMipmap(GL_TEXTURE_2D);
  16.  
  17.            // Parameters
  18.            glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
  19.            glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
  20.            glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR );
  21.            glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  22.            glBindTexture(GL_TEXTURE_2D, 0);
  23.            SOIL_free_image_data(image);
  24.            return textureID;
  25.         }
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rest of the gl functions do not end up with the compilation error. Any idea ?