private void ApplyStateCore(GraphicsContext ctx, ShaderProgram program, PrimitiveRestartState currentState)
{
if (Enabled != currentState.Enabled)
{
if (Enabled)
{
if (Gl.CurrentExtensions.PrimitiveRestart)
{
Gl.Enable(EnableCap.PrimitiveRestart);
}
else if (Gl.CurrentExtensions.PrimitiveRestart_NV)
{
Gl.EnableClientState(EnableCap.PrimitiveRestartNv);
}
else
{
throw new InvalidOperationException("primitive restart not supported");
}
}
else
{
if (Gl.CurrentExtensions.PrimitiveRestart)
{
Gl.Disable(EnableCap.PrimitiveRestart);
}
else if (Gl.CurrentExtensions.PrimitiveRestart_NV)
{
Gl.DisableClientState(EnableCap.PrimitiveRestartNv);
}
else
{
throw new InvalidOperationException("primitive restart not supported");
}
}
}
if (RestartIndex != currentState.RestartIndex)
{
if (Gl.CurrentExtensions.PrimitiveRestart)
{
Gl.PrimitiveRestartIndex(RestartIndex);
}
else if (Gl.CurrentExtensions.PrimitiveRestart_NV)
{
Gl.PrimitiveRestartIndexNV(RestartIndex);
}
else
{
throw new InvalidOperationException("primitive restart not supported");
}
}
}
/// <summary>
/// Set ShaderProgram state.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> which has defined the shader program <paramref name="program"/>.
/// </param>
/// <param name="program">
/// The <see cref="ShaderProgram"/> which has the state set.
/// </param>
public override void Apply(GraphicsContext ctx, ShaderProgram program)
{
GraphicsResource.CheckCurrentContext(ctx);
PrimitiveRestartState currentState = (PrimitiveRestartState)ctx.GetCurrentState(StateIndex);
if (currentState != null)
{
ApplyStateCore(ctx, program, currentState);
}
else
{
ApplyStateCore(ctx, program);
}
ctx.SetCurrentState(this);
}