tone mapping

Effects/HLSL/ToneMapEffect.fx

@@ -0,0 +1,20 @@
+sampler TextureSampler : register(s0);
+
+float4 main_ps(float2 texCoord : TEXCOORD0) : COLOR0
+{
+    float3 color = tex2D(TextureSampler, texCoord).xyz;
+
+    color = color / (color + float3(1.0, 1.0, 1.0));
+    float exposureConstant = 1.0 / 2.2;
+    color = pow(color, float3(exposureConstant, exposureConstant, exposureConstant));
+
+    return float4(color, 1.0);
+}
+
+Technique DeferredPBR
+{
+    Pass
+    {
+        PixelShader = compile ps_3_0 main_ps();
+    }
+}

Kav.Core.csproj

@@ -27,6 +27,9 @@
     <EmbeddedResource Include="Effects\FXB\DeferredPBR_GBufferEffect.fxb">
       <LogicalName>Kav.Resources.DeferredPBR_GBufferEffect.fxb</LogicalName>
     </EmbeddedResource>
+    <EmbeddedResource Include="Effects\FXB\ToneMapEffect.fxb">
+      <LogicalName>Kav.Resources.ToneMapEffect.fxb</LogicalName>
+    </EmbeddedResource>
     <EmbeddedResource Include="Effects\FXB\DeferredPBREffect.fxb">
       <LogicalName>Kav.Resources.DeferredPBREffect.fxb</LogicalName>
     </EmbeddedResource>

Kav.Framework.csproj

@@ -27,6 +27,9 @@
     <EmbeddedResource Include="Effects\FXB\DeferredPBR_GBufferEffect.fxb">
       <LogicalName>Kav.Resources.DeferredPBR_GBufferEffect.fxb</LogicalName>
     </EmbeddedResource>
+    <EmbeddedResource Include="Effects\FXB\ToneMapEffect.fxb">
+      <LogicalName>Kav.Resources.ToneMapEffect.fxb</LogicalName>
+    </EmbeddedResource>
     <EmbeddedResource Include="Effects\FXB\DeferredPBREffect.fxb">
       <LogicalName>Kav.Resources.DeferredPBREffect.fxb</LogicalName>
     </EmbeddedResource>

Renderer.cs

@@ -25,6 +25,7 @@ namespace Kav
         private DeferredPBR_PointLightEffect DeferredPointLightEffect { get; }
         private DeferredPBR_DirectionalLightEffect DeferredDirectionalLightEffect { get; }
         private SimpleDepthEffect SimpleDepthEffect { get; }
+        private Effect ToneMapEffect { get; }
 
         private RenderTarget2D gPosition { get; }
         private RenderTarget2D gNormal { get; }
@@ -133,8 +134,8 @@ namespace Kav
             DeferredAmbientLightEffect = new DeferredPBR_AmbientLightEffect(GraphicsDevice);
             DeferredPointLightEffect = new DeferredPBR_PointLightEffect(GraphicsDevice);
             DeferredDirectionalLightEffect = new DeferredPBR_DirectionalLightEffect(GraphicsDevice);
-
             DeferredDirectionalLightEffect.ShadowMapSize = ShadowMapSize;
+            ToneMapEffect = new Effect(graphicsDevice, Resources.ToneMapEffect);
 
             FullscreenTriangle = new VertexBuffer(GraphicsDevice, typeof(VertexPositionTexture), 3, BufferUsage.WriteOnly);
             FullscreenTriangle.SetData(new VertexPositionTexture[3] {
@@ -223,7 +224,7 @@ namespace Kav
 
             GraphicsDevice.SetRenderTarget(null);
             GraphicsDevice.Clear(Color.Black);
-            SpriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Opaque);
+            SpriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Opaque, null, null, null, ToneMapEffect);
             SpriteBatch.Draw(ColorRenderTarget, Vector2.Zero, Color.White);
             SpriteBatch.End();
         }

Resources.cs

@@ -51,6 +51,18 @@ namespace Kav
             }
         }
 
+        public static byte[] ToneMapEffect
+        {
+            get
+            {
+                if (toneMapEffect == null)
+                {
+                    toneMapEffect = GetResource("ToneMapEffect");
+                }
+                return toneMapEffect;
+            }
+        }
+
         public static byte[] DeferredPBREffect
         {
             get
@@ -91,6 +103,7 @@ namespace Kav
         private static byte[] pointLightEffect;
         private static byte[] directionalLightEffect;
         private static byte[] gBufferEffect;
+        private static byte[] toneMapEffect;
         private static byte[] deferredPBREffect;
         private static byte[] pbrEffect;
         private static byte[] simpleDepthEffect;