Allowed PostProcessUtility.FinalizeHDR to select a color curve.

src/renderer/SM.Base/PostEffects/PostProcessUtility.cs

@@ -4,18 +4,33 @@ using OpenTK.Graphics.OpenGL4;
 using SM.Base.PostProcess;
 using SM.Base.Utility;
 using SM.OGL.Framebuffer;
+using SM.OGL.Shaders;
+using System.Collections.Generic;
 
 #endregion
 
 namespace SM.Base.PostEffects
 {
+    public enum HDRColorCurve
+    {
+        OnlyExposure,
+        Reinhard,
+        ACES
+    }
+
     /// <summary>
     /// This class has some utility for render pipelines 
     /// </summary>
     public static class PostProcessUtility
     {
-        private static readonly PostProcessShader _hdrExposureShader =
-            new PostProcessShader(AssemblyUtility.ReadAssemblyFile(SMRenderer.PostProcessPath + ".finalize_hdr.glsl"));
+        private static readonly string _finalizeHdrCode = AssemblyUtility.ReadAssemblyFile(SMRenderer.PostProcessPath + ".finalize_hdr.glsl");
+
+        private static readonly Dictionary<HDRColorCurve, PostProcessShader> _hdrExposureShader = new Dictionary<HDRColorCurve, PostProcessShader>()
+        {
+            { HDRColorCurve.OnlyExposure, new PostProcessShader(new ShaderFile(_finalizeHdrCode) { StringOverrides = { { "TYPE", "0" } } }) },
+            { HDRColorCurve.Reinhard, new PostProcessShader(new ShaderFile(_finalizeHdrCode) { StringOverrides = { { "TYPE", "1" } } }) },
+            { HDRColorCurve.ACES, new PostProcessShader(new ShaderFile(_finalizeHdrCode) { StringOverrides = { { "TYPE", "2" } } }) },
+        };
 
         private static readonly PostProcessShader _gammaShader =
             new PostProcessShader(
@@ -48,9 +63,9 @@ namespace SM.Base.PostEffects
         /// </summary>
         /// <param name="attachment"></param>
         /// <param name="exposure"></param>
-        public static void FinalizeHDR(ColorAttachment attachment, float exposure)
+        public static void FinalizeHDR(ColorAttachment attachment, HDRColorCurve colorCurve = HDRColorCurve.ACES, float exposure = 1)
         {
-            _hdrExposureShader.Draw(u =>
+            _hdrExposureShader[colorCurve].Draw(u =>
             {
                 u["Gamma"].SetFloat(Gamma);
                 u["Exposure"].SetFloat(exposure);

src/renderer/SM.Base/PostEffects/Shaders/finalize_hdr.glsl

@@ -1,4 +1,5 @@
 #version 330
+#define TYPE //!TYPE
 
 in vec2 vTexture;
 
@@ -29,7 +30,12 @@ vec3 exposure(vec3 scene) {
 void main() {
 
 	vec3 scene = texture2D(Scene, vTexture).rgb;
-	vec3 result = reinhardTone(scene);
+	vec3 result = exposure(scene);
+	#if (TYPE == 1)
+	result = reinhardTone(result);
+	#elif (TYPE == 2)
+	result = ACES(result);
+	#endif
 
 	color = vec4(pow(result, vec3(1 / Gamma)), 1);
 }

src/renderer/SM.Base/PostProcess/PostProcessShader.cs

@@ -43,8 +43,13 @@ namespace SM.Base.PostProcess
         /// <summary>
         ///     Creates the shader with the default vertex shader and custom fragment.
         /// </summary>
-        public PostProcessShader(string fragment) : this(_normalVertex,
-            new ShaderFile(fragment))
+        public PostProcessShader(string fragment) : this(_normalVertex, new ShaderFile(fragment))
+        {
+        }
+        /// <summary>
+        ///     Creates the shader with the default vertex shader and custom fragment shader.
+        /// </summary>
+        public PostProcessShader(ShaderFile fragment) : this(_normalVertex, fragment)
         {
         }
 
@@ -60,7 +65,7 @@ namespace SM.Base.PostProcess
         {
         }
         /// <summary>
-        ///     Creates the shader with an vertex extension and custom fragment.
+        ///     Creates the shader with an vertex shader and custom fragment.
         /// </summary>
         /// <param name="vertex"></param>
         /// <param name="fragment"></param>
@@ -68,7 +73,12 @@ namespace SM.Base.PostProcess
         {
         }
 
-        private PostProcessShader(ShaderFile vertex, ShaderFile fragment) : base(
+        /// <summary>
+        ///     Creates the shader with an vertex shader and custom fragment.
+        /// </summary>
+        /// <param name="vertex"></param>
+        /// <param name="fragment"></param>
+        public PostProcessShader(ShaderFile vertex, ShaderFile fragment) : base(
             new ShaderFileCollection(vertex, fragment))
         {
             fragment.GLSLExtensions.Add(_fragExtensions);

tests/SM_TEST/TestRenderPipeline.cs

@@ -58,7 +58,7 @@ namespace SM_TEST
             _bloom.Draw(_postBuffer["color"], context);
             Framebuffer.Screen.Activate(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
 
-            PostProcessUtility.FinalizeHDR(_postBuffer["color"], 1f);
+            PostProcessUtility.FinalizeHDR(_postBuffer["color"], HDRColorCurve.OnlyExposure, .1f);
         }
     }
 }