public void DrawString(GLRenderVxFormattedString renderVx, double x, double y)
        {
            _pcx.LoadTexture(_glBmp);
            _pcx.FontFillColor = _painter.FontFillColor;

            DrawingGL.GLRenderVxFormattedString renderVxString1 = (DrawingGL.GLRenderVxFormattedString)renderVx;
            DrawingGL.VertexBufferObject        vbo             = renderVxString1.GetVbo();
            vbo.Bind();
            _pcx.DrawGlyphImageWithSubPixelRenderingTechnique4_FromLoadedVBO(renderVxString1.IndexArrayCount, (float)x, (float)y);
            vbo.UnBind();
        }