Cycles: Constant fold for the Gamma Node.

2015-12-22 13:53:13 +01:00
parent ba82981a2f
commit 377b52be2e
4 changed files with 33 additions and 6 deletions
--- a/intern/cycles/kernel/svm/svm_math_util.h
+++ b/intern/cycles/kernel/svm/svm_math_util.h
@@ -166,5 +166,17 @@ ccl_device float3 svm_math_blackbody_color(float t) {
 	return make_float3(4.70366907f, 0.0f, 0.0f);
 }

+ccl_device_inline float3 svm_math_gamma_color(float3 color, float gamma)
+{
+	if(color.x > 0.0f)
+		color.x = powf(color.x, gamma);
+	if(color.y > 0.0f)
+		color.y = powf(color.y, gamma);
+	if(color.z > 0.0f)
+		color.z = powf(color.z, gamma);
+
+	return color;
+}
+
 CCL_NAMESPACE_END