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Allowed PostProcessUtility.FinalizeHDR to select a color curve.

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This commit is contained in:
Nineto Nine 2021-09-27 17:48:17 +02:00
parent 17cbebcf6a
commit 443877019b
4 changed files with 41 additions and 10 deletions
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23
src/renderer/SM.Base/PostEffects/PostProcessUtility.cs
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@ -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);

8
src/renderer/SM.Base/PostEffects/Shaders/finalize_hdr.glsl
View file

@ -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);
}