/// <summary>
/// Draws a fullscreen quad with the specified effect and parameters.
/// </summary>
/// <param name="device">The device.</param>
/// <param name="effect">The effect.</param>
/// <param name="parameters">The parameters.</param>
/// <exception cref="System.ArgumentNullException">effect</exception>
public static void DrawQuad(this GraphicsDevice device, Effect effect, ParameterCollection parameters = null)
{
if (effect == null)
{
throw new ArgumentNullException("effect");
}
// Apply the effect
if (parameters != null)
{
effect.Apply(device, parameters, false);
}
else
{
effect.Apply(device, false);
}
// Draw a full screen quad
device.DrawQuad();
// Unapply
effect.UnbindResources(device);
}
/// <summary>
/// Draws a fullscreen quad with the specified effect and parameters.
/// </summary>
/// <param name="device">The device.</param>
/// <param name="effect">The effect.</param>
/// <param name="parameterCollections">The parameter collections.</param>
/// <exception cref="System.ArgumentNullException">effect</exception>
public static void DrawQuad <TList>(this GraphicsDevice device, Effect effect, TList parameterCollections) where TList : class, IEnumerable <ParameterCollection>
{
if (effect == null)
{
throw new ArgumentNullException("effect");
}
// Apply the effect
effect.Apply(device, parameterCollections, false);
// Draw a full screen quad
device.DrawQuad();
// Unapply
effect.UnbindResources(device);
}
protected virtual void PrepareForRendering()
{
// Use LinearClamp for sampler state
var localSamplerState = SamplerState ?? GraphicsDevice.SamplerStates.LinearClamp;
// Sets the sampler state of the effect
Parameters.Set(TexturingKeys.Sampler, localSamplerState);
Effect.Apply(Parameters);
// Setup states (Blend, DepthStencil, Rasterizer)
GraphicsDevice.SetBlendState(BlendState ?? GraphicsDevice.BlendStates.AlphaBlend);
GraphicsDevice.SetDepthStencilState(DepthStencilState ?? GraphicsDevice.DepthStencilStates.Default, StencilReferenceValue);
GraphicsDevice.SetRasterizerState(RasterizerState ?? GraphicsDevice.RasterizerStates.CullBack);
// Set VertexInputLayout
GraphicsDevice.SetVertexArrayObject(ResourceContext.VertexArrayObject);
// If this is a deferred D3D context, reset position so the first Map call will use D3D11_MAP_WRITE_DISCARD.
if (GraphicsDevice.IsDeferred)
{
ResourceContext.VertexBufferPosition = 0;
}
}
