// Decompiled with JetBrains decompiler
// Type: Microsoft.Iris.Render.Graphics.Dx9EdgeDetectionElement
// Assembly: UIX.RenderApi, Version=4.8.0.0, Culture=neutral, PublicKeyToken=ddd0da4d3e678217
// MVID: D47658B8-A8EA-43D6-8837-ECE823BFFFC1
// Assembly location: C:\Program Files\Zune\UIX.RenderApi.dll

using Microsoft.Iris.Library;

namespace Microsoft.Iris.Render.Graphics
{
  internal class Dx9EdgeDetectionElement
  {
    internal static void Generate(
      EdgeDetectionElement efoEdgeDetection,
      ref Dx9EffectBuilder effectBuilder)
    {
      Dx9TextureInfo textureInfo = effectBuilder.GetTextureInfo(effectBuilder.ImageCount - 1);
      effectBuilder.AddRequirement(textureInfo, Dx9TextureRequirements.TexelSize, (object) null);
      VariableInfo variableInfo = new VariableInfo()
      {
        ID = (int) efoEdgeDetection.EdgeLimitID,
        Type = Dx9VariableType.Float,
        IsDynamic = efoEdgeDetection.IsDynamicProperty("EdgeLimit")
      };
      variableInfo.Name = variableInfo.IsDynamic ? effectBuilder.GenerateGlobalVariable(variableInfo.Type, efoEdgeDetection.Name) : effectBuilder.GenerateGlobalConstant(variableInfo.Type, efoEdgeDetection.Name);
      variableInfo.DefaultValue = (object) efoEdgeDetection.EdgeLimit;
      effectBuilder.AddPropertyVariable(variableInfo);
      effectBuilder.EmitPixelFragment(InvariantString.Format("     {{\r\n         // Sample neightbour pixel\r\n         float4 vBottomPixel = tex2D({1}, {2} + float2(0.0f, {3}.y));\r\n         float currentAvg = {0}.r + {0}.g + {0}.b;\r\n         currentAvg = currentAvg / 3.0f;\r\n         float bottomAvg = vBottomPixel.r + vBottomPixel.g + vBottomPixel.b;\r\n         bottomAvg = bottomAvg / 3.0f;\r\n         float diff = abs(currentAvg - bottomAvg);\r\n         // change color into black or white depending on what the delta is\r\n         if (diff < {4})\r\n         {{\r\n             {0}.rgb = 1.0f;\r\n         }}\r\n         else\r\n         {{\r\n             {0}.rgb = 0.0f;\r\n         }}\r\n     }}\r\n\r\n", (object) effectBuilder.PixelShaderOutput, (object) textureInfo.Sampler, (object) textureInfo.TexCoordInput, (object) textureInfo.TexelSize, (object) variableInfo.Name));
    }
  }
}