//----------------------------------------------------------------------
#region ** CustomEffect
/// <summary>
/// Creates any resources used repeatedly during subsequent rendering calls.
/// </summary>
public void Initialize(D2D.EffectContext effectContext, D2D.TransformGraph transformGraph)
{
if (_shaderBuffer == null)
{
Assembly asm = typeof(WarpEffect).Assembly;
using (Stream stream = asm.GetManifestResourceStream("BitmapSamples.Resources.WarpEffect.cso"))
{
int length = (int)stream.Length;
_shaderBuffer = new byte[length];
stream.Read(_shaderBuffer, 0, length);
}
}
effectContext.LoadVertexShader(GUID_WarpVertexShader, _shaderBuffer);
_vertexBuffer = effectContext.FindVertexBuffer(GUID_WarpVertexBuffer);
if (_vertexBuffer == null)
{
using (var meshStream = GenerateMesh())
{
var props = new D2D.VertexBufferProperties(1, D2D.VertexUsage.Static, meshStream);
var desc = new D2D.InputElement("MESH_POSITION", 0, DXGI.Format.R32G32_Float, 0, 0);
var custProps = new D2D.CustomVertexBufferProperties(_shaderBuffer, new D2D.InputElement[] { desc }, DXUtil.SizeOf <Vector2>());
_vertexBuffer = D2D.VertexBuffer.Create(effectContext, GUID_WarpVertexShader, props, custProps);
}
}
transformGraph.SetSingleTransformNode(this);
}
/// <summary>
/// The renderer calls this method to provide the effect implementation with a way to specify its transform graph and transform graph changes.
/// It is executed when: 1) When the effect is first initialized. 2) If the number of inputs to the effect changes.
/// </summary>
public int SetGraph(D2D.TransformGraph transformGraph)
{
return(HResult.NotImplemented.Code);
}