BO3: HDR10

Shaders/Call of Duty Black Ops 3/Includes/Common.hlsl

@@ -5,6 +5,57 @@
 #include "../../Includes/Common.hlsl"
 #include "Settings.hlsl"
 
+// // \left\{x<0.081:\frac{x}{4.5},\left(\frac{x+0.099}{1.099}\right)^{\frac{1}{0.45}}\right\}
+// #define DECODEREC709(T)\
+// T DecodeRec709(T x) {\
+//   return x < 0.081 ? x / 4.5 : pow((x + 0.099) / 1.099, 1.0 / 0.45);\
+// }
+// DECODEREC709(float)
+// DECODEREC709(float3)
+// DECODEREC709(float4)
+// #undef DECODEREC709
+// 
+// // \left\{x<0.018:4.5x,1.099x^{0.45}-0.099\right\}
+// #define ENCODEREC709(T)\
+// T EncodeRec709(T x) {\
+//   return x < 0.018 ? 4.5 * x : pow(x * 1.099, 0.45) - 0.099;\
+// }
+// ENCODEREC709(float)
+// ENCODEREC709(float3)
+// ENCODEREC709(float4)
+// #undef ENCODEREC709
+
+#define DECODEREC709(T)\
+T DecodeRec709(T x) {\
+  T r0, r2, r3, r4;\
+  r0 = x;\
+  r2 = 0.0989999995 + r0; \
+  r2 = 0.909918129 * r2;\
+  r2 = pow(r2, 2.22222233);\
+  r3 = -(0.0810000002 >= r0);\
+  r4 = 0.222222224 * r0;\
+  r2 = r3 ? r4 : r2;\
+  return r2;\
+}
+DECODEREC709(float3)
+DECODEREC709(float4)
+#undef DECODEREC709
+
+#define ENCODEREC709(T)\
+T EncodeRec709(T x) {\
+  T r0, r1, r2;\
+  r1 = x;\
+  r0 = pow(r1, 0.449999988);\
+  r0 = r0 * 1.09899998 + -0.0989999995;\
+  r2 = -(0.0179999992 >= r1);\
+  r1 = 4.5 * r1;\
+  r0 = r2 ? r1 : r0;\
+  return r0;\
+}
+ENCODEREC709(float3)
+ENCODEREC709(float4)
+#undef ENCODEREC709
+
 #if CUSTOM_LUMA == 1
   #if CUSTOM_SDR == 1
     #undef CUSTOM_LUTBUILDER_COLORSPACE