Custom Pixel Shader Effect はじめました。(その2)

外から輝度を変更できるように変更。

Brighten.fx は以下。

float Threshold : register(C0);
sampler2D input : register(s0);

float4 main(float2 uv : TEXCOORD) : COLOR
{
  float4 Color;
  Color = tex2D(input , uv.xy)*Threshold;
  return Color;
}

BrightenEffect は以下。

public class BrightenEffect : ShaderEffect {

  private static PixelShader shader = new PixelShader() {
    UriSource = new Uri("/SilverlightSquare.CustomEffect;component/Assets/Shader/Brighten.ps", UriKind.Relative)
  };

  public BrightenEffect() {
    this.PixelShader = shader;
  
    this.UpdateShaderValue(InputProperty);
    this.UpdateShaderValue(ThresholdProperty);
  }

  public static DependencyProperty ThresholdProperty =
    DependencyProperty.Register("Threshold", typeof(double), typeof(BrightenEffect),
      new PropertyMetadata(1d, PixelShaderConstantCallback(0)));

  public virtual double Threshold {
    get {
      return (double)GetValue(ThresholdProperty);
    }
    set {
      SetValue(ThresholdProperty, value);
    }
  }

  public static DependencyProperty InputProperty =
    ShaderEffect.RegisterPixelShaderSamplerProperty("Input", typeof(BrightenEffect), 0);

  public virtual Brush Input {
    get {
      return (Brush)GetValue(InputProperty);
    }
    set {
      SetValue(InputProperty, value);
    }
  }
}