My texture class

// Texture class
class Texture {
public:
    GLuint handle;
    Texture();
    virtual ~Texture();

    void loadData (int w, int h, int chan, GLenum format, void* data);
    void enable();
};

Texture::Texture() {
    handle = 0;
}

void Texture::loadData(int w, int h, int chan, GLenum format, void* data)
{
    glGenTextures(1, &handle);
    enable();

    // Bilinear filtering
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    // Clamp: texture ends at edges
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

    // Create the texture
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glTexImage2D(GL_TEXTURE_2D, 0, chan, w, h, 0, format, GL_UNSIGNED_BYTE, data);


    //gluBuild2DMipmaps(GL_TEXTURE_2D, 3, w, h, format, GL_UNSIGNED_BYTE, data);
}

void Texture::enable()
{
    glBindTexture(GL_TEXTURE_2D, handle);
}

Texture::~Texture() {
    if (handle != 0)
        glDeleteTextures(1, &handle);
}