/// <inheritdoc/>
public EffectParameterBinding GetBinding(Effect effect, EffectParameter parameter, IDictionary<string, object> opaqueData)
{
if (effect is AlphaTestEffect
|| effect is BasicEffect
|| effect is DualTextureEffect
|| effect is EnvironmentMapEffect
|| effect is SkinnedEffect)
{
// The ShaderIndex parameter is set by effect technique bindings.
var description = effect.GetParameterDescriptions()[parameter];
if (description.Semantic == "XnaShaderIndex")
return new NullParameterBinding<int>(effect, parameter);
if (description.Semantic == "XnaFogVector")
return new FogVectorParameterBinding(effect, parameter);
}
return null;
}
/// <summary>
/// Initializes a new instance of the <see cref="EffectParameterBinding"/> class.
/// </summary>
/// <param name="effect">The effect.</param>
/// <param name="parameter">The effect parameter.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="effect"/> or <paramref name="parameter"/> is <see langword="null"/>.
/// </exception>
protected EffectParameterBinding(Effect effect, EffectParameter parameter)
{
if (effect == null)
throw new ArgumentNullException("effect");
if (parameter == null)
throw new ArgumentNullException("parameter");
try
{
Description = effect.GetParameterDescriptions()[parameter];
}
catch (KeyNotFoundException)
{
throw new GraphicsException("Missing effect parameter description.\n\n"
+ "Cause:\nThis can happen if an effect parameter uses a struct type, "
+ "and the parameter name or semantic is known by an effect interpreter, but "
+ "no binding is provided by any effect binder.\n\n"
+ "Solution:\nAn effect binder must create a binding for this parameter.");
}
if ((GlobalSettings.ValidationLevelInternal & GlobalSettings.ValidationLevelDevBasic) != 0)
VerifyEffectParameter(effect);
}
