GLuint texture[meshes_number];            // 1 mesh = 1 texture
int globalcounter=0;

//Then I create the following function:

void GeneratePlusBindTextures (&scene){

(for every mesh on current scene) {
    (if current mesh has got a not null Qimage texture){
        glEnable(GL_TEXTURE_2D);
        glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
        glGenTextures(1, &texture[globalcounter]);                  // Create The Texture
        glBindTexture(GL_TEXTURE_2D, texture[globalcounter]);
        glTexImage2D(GL_TEXTURE_2D, 0, 3, 256 , 256 , 0, GL_RGB, GL_UNSIGNED_BYTE, p.Mat().GetTexture()->Data() );
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
        glDisable(GL_TEXTURE_2D);
        globalcounter++;
    }
}

//where p.Mat().GetTexture()->Data() returns an uchar pointer to qImage fist byte.
//After having filled the texture array,I use the draw method:

void draw()
{
   glBindTexture(GL_TEXTURE_2D, textures[somevalue]);
   // Any drawing here will use somevalue texture
}