Apply adjustable tonemapper for bloom and autoexposure

Author: papadanku

shaders/cAutoExposure.fx

@@ -1,5 +1,6 @@
 #include "shared/cMacros.fxh"
 #include "shared/cGraphics.fxh"
+#include "shared/cTonemap.fxh"
 
 /*
     Automatic exposure shader using hardware blending
@@ -129,11 +130,11 @@ float3 PS_Exposure(VS2PS_Quad Input) : SV_TARGET0
         float3 Color1 = ExposedColor.rgb;
         float3 Color2 = lerp(Dot * 2.0, Color.rgb, Mask * 0.5);
 
-        return lerp(Color1, Color2, Mask).rgb;
+        return lerp(ApplyTonemap(Color1), Color2, Mask).rgb;
     }
     else
     {
-        return ExposedColor;
+        return ApplyTonemap(ExposedColor);
     }
 }
 

shaders/cBloom.fx

@@ -1,39 +1,45 @@
 #include "shared/cBuffers.fxh"
 #include "shared/cGraphics.fxh"
+#include "shared/cTonemap.fxh"
 
 /*
     [Shader Options]
 */
 
 uniform float _Threshold <
+    ui_category = "Bloom";
     ui_label = "Threshold";
     ui_type = "slider";
     ui_min = 0.0;
     ui_max = 1.0;
 > = 0.8;
 
 uniform float _Smooth <
+    ui_category = "Bloom";
     ui_label = "Smoothing";
     ui_type = "slider";
     ui_min = 0.0;
     ui_max = 1.0;
 > = 0.5;
 
 uniform float _Saturation <
+    ui_category = "Bloom";
     ui_label = "Saturation";
     ui_type = "slider";
     ui_min = 0.0;
     ui_max = 10.0;
 > = 1.0;
 
 uniform float3 _ColorShift <
+    ui_category = "Bloom";
     ui_label = "Color Shift (RGB)";
     ui_type = "color";
     ui_min = 0.0;
     ui_max = 1.0;
 > = 1.0;
 
 uniform float _Intensity <
+    ui_category = "Bloom";
     ui_label = "Intensity";
     ui_type = "slider";
     ui_min = 0.0;
@@ -275,7 +281,7 @@ float4 PS_Composite(VS2PS_Quad Input) : SV_TARGET0
     float3 BloomColor = tex2D(SampleTempTex1, Input.Tex0).rgb;
 
     float4 Color = 1.0;
-    Color.rgb = ToneMapACESFilmic(BaseColor + (BloomColor * _Intensity));
+    Color.rgb = ApplyTonemap(BaseColor + (BloomColor * _Intensity));
     return Color;
 }
 

shaders/shared/cTonemap.fxh

@@ -80,4 +80,27 @@
         return 0.5 * (D * SDR - sqrt(((D*D - 4.0*C*E) * SDR + 4.0*A*E-2.0*B*D) * SDR + B*B) - B) / (A - C * SDR);
     }
 
+    uniform int _OutputTonemapOperator <
+        ui_category = "OUTPUT";
+        ui_label = "Tonemap Operator";
+        ui_tooltip = "Select a tonemap operator for the output";
+        ui_type = "combo";
+        ui_items = "Reinhard\0DirectX Graphics Sample\0ACES Filmic Approximation\0";
+    > = 0;
+
+    float3 ApplyTonemap(float3 HDR)
+    {
+        switch (_OutputTonemapOperator)
+        {
+            case 0:
+                return ApplyReinhardTonemap(HDR, 1.0);
+            case 1:
+                return ApplyNewToneMap(HDR);
+            case 2:
+                return ApplyToneMapACES(HDR);
+            default:
+            	return HDR;
+        }
+    }
+
 #endif