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Borderlands GOTY Enhanced: Add XeGTAO + Video AutoHDR controls + other fixes #151

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Merged
Filoppi merged 1 commit into from
Jul 12, 2026
Merged

Borderlands GOTY Enhanced: Add XeGTAO + Video AutoHDR controls + other fixes #151

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65 changes: 36 additions & 29 deletions Shaders/Borderlands GOTY Enhanced/BL_Video_0x0E97A4A0.ps_5_0.hlsl
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,9 @@
// paper white.
// Kept conservative (videos are low-bitrate, highlight compression artifacts blow up if pushed hard).

#include "../Includes/Common.hlsl"
// clang-format off
#include "Includes/Common.hlsl" // game-local: pulls GameCBuffers (VideoAutoHDR* fields) BEFORE shared Settings
// clang-format on

// Light AutoHDR on videos (0 = off → flat SDR at paper white). Peak kept low on purpose.
#ifndef ENABLE_VIDEO_AUTO_HDR
Expand All @@ -19,10 +21,10 @@

cbuffer _Globals : register(b0)
{
float4 cmatrix[4] : packoffset(c0);
float4 alpha_mult : packoffset(c4);
float4 hdr : packoffset(c5);
float4 ctcp : packoffset(c6);
float4 cmatrix[4] : packoffset(c0);
float4 alpha_mult : packoffset(c4);
float4 hdr : packoffset(c5);
float4 ctcp : packoffset(c6);
}

SamplerState YTexSampler_s : register(s0);
Expand All @@ -31,35 +33,40 @@ Texture2D<float4> YTex : register(t0);
Texture2D<float4> CrCbTex : register(t1);

void main(
float2 v0 : TEXCOORD0,
float4 v1 : SV_Position0,
out float4 o0 : SV_Target0)
float2 v0 : TEXCOORD0,
float4 v1 : SV_Position0,
out float4 o0 : SV_Target0)
{
float4 r0, r1;
float4 r0, r1;

r0.x = YTex.Sample(YTexSampler_s, v0.xy).x;
r0.yz = CrCbTex.Sample(CrCbTexSampler_s, v0.xy).xy;
r1.xyz = cmatrix[0].xyz * r0.yyy;
r0.xyw = r0.xxx * cmatrix[3].xyz + r1.xyz;
r0.xyz = r0.zzz * cmatrix[1].xyz + r0.xyw;
r0.xyz = cmatrix[2].xyz + r0.xyz;
r0.w = 1;
o0.xyzw = alpha_mult.xyzw * r0.xyzw;
o0.rgb = saturate(o0.rgb); // restore the vanilla 8-bit backbuffer clamp (kills YUV overshoot + negatives)
r0.x = YTex.Sample(YTexSampler_s, v0.xy).x;
r0.yz = CrCbTex.Sample(CrCbTexSampler_s, v0.xy).xy;
r1.xyz = cmatrix[0].xyz * r0.yyy;
r0.xyw = r0.xxx * cmatrix[3].xyz + r1.xyz;
r0.xyz = r0.zzz * cmatrix[1].xyz + r0.xyw;
r0.xyz = cmatrix[2].xyz + r0.xyz;
r0.w = 1;
o0.xyzw = alpha_mult.xyzw * r0.xyzw;
o0.rgb = saturate(o0.rgb); // restore the vanilla 8-bit backbuffer clamp (kills YUV overshoot + negatives)

// Work in linear: AutoHDR (optional) and the paper-white pre-scale both belong in linear space. The
// composition decodes gamma then multiplies by UIPaperWhite (linear), so the pre-scale must pre-compensate
// that linear multiply BEFORE re-encoding — applying it in gamma space diverges for GamePaperWhite!=UIPaperWhite.
float3 lin = gamma_to_linear(o0.rgb);
// Work in linear: AutoHDR (optional) and the paper-white pre-scale both belong in linear space. The
// composition decodes gamma then multiplies by UIPaperWhite (linear), so the pre-scale must pre-compensate
// that linear multiply BEFORE re-encoding — applying it in gamma space diverges for GamePaperWhite!=UIPaperWhite.
float3 lin = gamma_to_linear(o0.rgb);
#if ENABLE_VIDEO_AUTO_HDR
// Video is gamma-encoded SDR; expand highlights mildly for HDR.
lin = PumboAutoHDR(lin, VIDEO_AUTO_HDR_PEAK_NITS, LumaSettings.GamePaperWhiteNits);
// Video is gamma-encoded SDR; expand highlights mildly for HDR. Runtime-gated (ImGui "Video AutoHDR"):
// boost 0 = peak at paper white -> PumboAutoHDR no-ops (off); 1 = full VIDEO_AUTO_HDR_PEAK_NITS.
if (LumaSettings.GameSettings.VideoAutoHDREnable > 0.5)
{
const float peakNits = lerp(sRGB_WhiteLevelNits, VIDEO_AUTO_HDR_PEAK_NITS, saturate(LumaSettings.GameSettings.VideoAutoHDRBoost));
lin = PumboAutoHDR(lin, peakNits, LumaSettings.GamePaperWhiteNits);
}
#endif
#if UI_DRAW_TYPE >= 2
// Match the tonemap pass (linear pre-scale, see Luma_BL_Tonemap.hlsl): land full-screen movies at the same
// brightness as in-game after the composition's UIPaperWhite rescale, when UIPaperWhite != GamePaperWhite.
lin *= LumaSettings.GamePaperWhiteNits / max(LumaSettings.UIPaperWhiteNits, 1.0);
// Match the tonemap pass (linear pre-scale, see Luma_BL_Tonemap.hlsl): land full-screen movies at the same
// brightness as in-game after the composition's UIPaperWhite rescale, when UIPaperWhite != GamePaperWhite.
lin *= LumaSettings.GamePaperWhiteNits / max(LumaSettings.UIPaperWhiteNits, 1.0);
#endif
o0.rgb = linear_to_gamma(lin); // re-encode for the gamma post buffer
return;
o0.rgb = linear_to_gamma(lin); // re-encode for the gamma post buffer
return;
}
38 changes: 20 additions & 18 deletions Shaders/Borderlands GOTY Enhanced/Includes/GameCBuffers.hlsl
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Original file line number Diff line number Diff line change
Expand Up @@ -9,24 +9,26 @@
// Mirrors c++ name spaces.
namespace CB
{
// User-facing grade controls, drawn in DrawImGuiSettings (main.cpp) and read in Luma_BL_Tonemap.hlsl.
// All apply only on the HDR tonemap path. SMAA metrics are passed via a dedicated CB at b1, not here.
struct LumaGameSettings
{
float Exposure; // exposure multiplier (1 = vanilla). Applied scene-referred, pre-grade.
float Saturation; // 1 = vanilla. Oklab saturation multiplier on the final HDR color.
float HighlightDechroma; // 0 = off (default; keep color, only mandatory gamut desat applies); higher = bright sources fade to white sooner. Optional perceptual taste.
float BloomIntensity; // 1 = vanilla. Scales the game's bloom contribution in the scene mix.
float Contrast; // 1 = vanilla. Slope contrast around 18% mid-gray on the final HDR color.
float Dithering; // 0/1 toggle. Animated triangular dither at output to break gradient banding.
float FlareOut; // 1 = vanilla. Scales the additive lens-flare/glare overlay (pass 0x010371F2).
};
// User-facing grade controls, drawn in DrawImGuiSettings (main.cpp) and read in Luma_BL_Tonemap.hlsl.
// All apply only on the HDR tonemap path. SMAA metrics are passed via a dedicated CB at b1, not here.
struct LumaGameSettings
{
float Exposure; // exposure multiplier (1 = vanilla). Applied scene-referred, pre-grade.
float Saturation; // 1 = vanilla. Oklab saturation multiplier on the final HDR color.
float HighlightDechroma; // 0 = off (default; keep color, only mandatory gamut desat applies); higher = bright sources fade to white sooner. Optional perceptual taste.
float BloomIntensity; // 1 = vanilla. Scales the game's bloom contribution in the scene mix.
float Contrast; // 1 = vanilla. Slope contrast around 18% mid-gray on the final HDR color.
float Dithering; // 0/1 toggle. Animated triangular dither at output to break gradient banding.
float FlareOut; // 1 = vanilla. Scales the additive lens-flare/glare overlay (pass 0x010371F2).
float VideoAutoHDREnable; // 0/1. Light AutoHDR on Bink movies (HDR only; pass 0x0E97A4A0). 0 = flat SDR at paper white.
float VideoAutoHDRBoost; // 0..1 highlight-expansion strength. 0 = off (peak == paper white); 1 = full VIDEO_AUTO_HDR_PEAK_NITS.
};

// Game specific cbuffer (instance/pass) data.
struct LumaGameData
{
float Dummy; // hlsl doesn't support empty structs
};
}
// Game specific cbuffer (instance/pass) data.
struct LumaGameData
{
float Dummy; // hlsl doesn't support empty structs
};
} // namespace CB

#endif // LUMA_GAME_CB_STRUCTS
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