From e709797d801438619fbb300a8de70406eb29d3ad Mon Sep 17 00:00:00 2001
From: jpark37 <jpark37@users.noreply.github.com>
Date: Thu, 29 Sep 2022 17:54:25 -0700
Subject: [PATCH] libobs: Add P3 shaders for Mac

---
 libobs/data/color.effect        |  8 ++++++++
 libobs/data/default_rect.effect | 17 +++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/libobs/data/color.effect b/libobs/data/color.effect
index da6d843b9..b60cb88e3 100644
--- a/libobs/data/color.effect
+++ b/libobs/data/color.effect
@@ -26,6 +26,14 @@ float3 rec709_to_rec2020(float3 v)
 	return float3(r, g, b);
 }
 
+float3 d65p3_to_rec709(float3 v)
+{
+	float r = dot(v, float3(1.2249401762805598, -0.22494017628055996, 0.));
+	float g = dot(v, float3(-0.042056954709688163, 1.0420569547096881, 0.));
+	float b = dot(v, float3(-0.019637554590334432, -0.078636045550631889, 1.0982736001409663));
+	return float3(r, g, b);
+}
+
 float3 rec2020_to_rec709(float3 v)
 {
 	float r = dot(v, float3(1.6604910021084345, -0.58764113878854951, -0.072849863319884883));
diff --git a/libobs/data/default_rect.effect b/libobs/data/default_rect.effect
index 05f82f0b3..2abb7a3ad 100644
--- a/libobs/data/default_rect.effect
+++ b/libobs/data/default_rect.effect
@@ -27,6 +27,14 @@ float4 PSDrawBare(VertInOut vert_in) : TARGET
 	return image.Sample(def_sampler, vert_in.uv);
 }
 
+float4 PSDrawD65P3(VertInOut vert_in) : TARGET
+{
+	float4 rgba = image.Sample(def_sampler, vert_in.uv);
+	rgba.rgb = srgb_nonlinear_to_linear(rgba.rgb);
+	rgba.rgb = d65p3_to_rec709(rgba.rgb);
+	return rgba;
+}
+
 float4 PSDrawOpaque(VertInOut vert_in) : TARGET
 {
 	return float4(image.Sample(def_sampler, vert_in.uv).rgb, 1.0);
@@ -48,6 +56,15 @@ technique Draw
 	}
 }
 
+technique DrawD65P3
+{
+	pass
+	{
+		vertex_shader = VSDefault(vert_in);
+		pixel_shader  = PSDrawD65P3(vert_in);
+	}
+}
+
 technique DrawOpaque
 {
 	pass