/// <summary>
/// Constructor.
/// </summary>
/// <param name="displaySize">
/// Size object describing the initial display resolution.
/// </param>
protected OpenGLRendererBase(Sizef displaySize)
{
d_displaySize = displaySize;
Init();
d_defaultTarget = new OpenGLViewportTarget(this);
}
protected OpenGLRendererBase()
{
Init();
InitialiseDisplaySizeWithViewportSize();
d_defaultTarget = new OpenGLViewportTarget(this);
}