//////////////////////////////////////////////////////
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// MK Glow Composite Sample //
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// //
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// Created by Michael Kremmel //
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// www.michaelkremmel.de //
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// Copyright © 2020 All rights reserved. //
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//////////////////////////////////////////////////////
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#ifndef MK_GLOW_COMPOSITE_SAMPLE
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#define MK_GLOW_COMPOSITE_SAMPLE
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(o);
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FragmentOutputAuto fO;
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UNITY_INITIALIZE_OUTPUT(FragmentOutputAuto, fO);
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half4 g = SampleTex2D(PASS_TEXTURE_2D(_BloomTex, sampler_BloomTex), UV_0);
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half4 source = SAMPLE_SOURCE;
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g.a = source.a;
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#ifdef COLORSPACE_GAMMA
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half3 src = GammaToLinearSpace(source.rgb);
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#else
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half3 src = source.rgb;
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#endif
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#ifdef MK_GLOW_DEBUG
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src = 0;
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#endif
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g.rgb *= BLOOM_INTENSITY;
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#ifdef MK_LENS_SURFACE
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half3 dirt = SampleTex2DNoScale(PASS_TEXTURE_2D(_LensSurfaceDirtTex, sampler_LensSurfaceDirtTex), LENS_SURFACE_DIRT_UV).rgb;
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half3 diffraction = SampleTex2DNoScale(PASS_TEXTURE_2D(_LensSurfaceDiffractionTex, sampler_LensSurfaceDiffractionTex), LENS_DIFFRACTION_UV).rgb;
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#ifdef COLORSPACE_GAMMA
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dirt = GammaToLinearSpace(dirt);
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diffraction = GammaToLinearSpace(diffraction);
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#endif
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dirt *= LENS_SURFACE_DIRT_INTENSITY;
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diffraction *= LENS_SURFACE_DIFFRACTION_INTENSITY;
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g.rgb = lerp(g.rgb * 3, g.rgb + g.rgb * dirt + g.rgb * diffraction, 0.5) * 0.3333h;
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#endif
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//When using gamma space at least try to get a nice looking result by adding the glow in the linear space of the src even if the base color space is gamma
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#ifdef MK_GLOW_COMPOSITE
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#ifdef COLORSPACE_GAMMA
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#ifndef MK_NATURAL
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g.rgb += src.rgb;
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#endif
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RETURN_TARGET_TEX ConvertToColorSpace(g);
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#else
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#ifndef MK_NATURAL
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g.rgb += src.rgb;
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#endif
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RETURN_TARGET_TEX g;
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#endif
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#else
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RETURN_TARGET_TEX ConvertToColorSpace(g);
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#endif
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#endif
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