From 704a416baab290e57bf6038efd214b7318b19eb7 Mon Sep 17 00:00:00 2001
From: Tony Wasserka <neobrainx@gmail.com>
Date: Sat, 29 Jun 2013 01:03:59 +0200
Subject: [PATCH] softgpu: Implement powered diffuse lighting.

---
 GPU/Software/Lighting.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/GPU/Software/Lighting.cpp b/GPU/Software/Lighting.cpp
index 5a7a8441bb..dfe4dbfa0e 100644
--- a/GPU/Software/Lighting.cpp
+++ b/GPU/Software/Lighting.cpp
@@ -83,6 +83,10 @@ void Process(VertexData& vertex)
 							: vertex.color0.rgb();
 
 		float diffuse_factor = Dot(L,vertex.normal) / d / vertex.worldpos.Length();
+		if (gstate.isUsingPoweredDiffuseLight(light)) {
+			float k = getFloat24(gstate.materialspecularcoef&0xFFFFFF);
+			diffuse_factor = pow(diffuse_factor, k);
+		}
 
 		vertex.color0.r() += att * spot * ldc.r() * mdc.r() * diffuse_factor / 255;
 		vertex.color0.g() += att * spot * ldc.g() * mdc.g() * diffuse_factor / 255;