/// <summary>
/// Set the scissor test rectangle.
/// </summary>
/// <param name="rectangle">The new scissor test rectangle, in normalized screen coordinates.</param>
/// <param name="screen">The screen to apply the test to.</param>
public static void SetScissorTest(Rectangle rectangle, Screen screen)
{
if (rectangle.X < 0 || rectangle.Y < 0 || rectangle.Width < 0 || rectangle.Height < 0)
{
throw new ArgumentException("Invalid viewport.");
}
if (rectangle == scissorTestArea)
{
return;
}
RenderQueue.Flush(); // Render batches should use the render settings at the start of the batch
scissorTestArea = rectangle;
if (scissorTestArea != null)
{
var r = (Rectangle)screen.VirtualToScreen((RectangleF)scissorTestArea.Value);
GL.Enable(EnableCap.ScissorTest);
GL.Scissor(r.X, screen.ScreenSize.Y - r.Y - r.Height, r.Width, r.Height);
}
else
{
ClearScissorTest();
}
}
/// <summary>
/// Set the viewport.
/// </summary>
/// <param name="viewport"></param>
/// <param name="screen"></param>
/// <returns></returns>
public static void SetViewport(Rectangle viewport, Screen screen)
{
if (viewport.X < 0 || viewport.Y < 0 || viewport.Width < 0 || viewport.Height < 0)
{
throw new ArgumentException("Invalid viewport.");
}
viewport = (Rectangle)screen.VirtualToScreen((RectangleF)viewport);
if (GraphicsDevice.viewport.Equals(viewport))
{
return;
}
RenderQueue.Flush(); // Render batches should use the render settings at the start of the batch
GraphicsDevice.viewport = viewport;
GL.Viewport(viewport.X, screen.ScreenSize.Y - viewport.Y - viewport.Height, viewport.Width, viewport.Height);
}
public void End()
{
Debug.Assert(hasBegun, "Called End() without calling Begin()");
RenderQueue.Flush();
hasBegun = false;
}