2 files changed, 17 insertions, 1 deletions
diff --git a/indra/llrender/llrender.cpp b/indra/llrender/llrender.cpp
index 5f5b76d425..f0d59d0eaf 100644
--- a/indra/llrender/llrender.cpp
+++ b/indra/llrender/llrender.cpp
@@ -1114,6 +1114,7 @@ void LLRender::syncLightState()
 		shader->uniform3fv("light_direction", 8, direction[0].mV);
 		shader->uniform3fv("light_attenuation", 8, attenuation[0].mV);
 		shader->uniform3fv("light_diffuse", 8, diffuse[0].mV);
+		shader->uniform4fv("light_ambient", 1, mAmbientLightColor.mV);
 	}
 }
 
@@ -1638,6 +1639,19 @@ LLLightState* LLRender::getLight(U32 index)
 	return NULL;
 }
 
+void LLRender::setAmbientLightColor(const LLColor4& color)
+{
+	if (color != mAmbientLightColor)
+	{
+		++mLightHash;
+		mAmbientLightColor = color;
+		if (!LLGLSLShader::sNoFixedFunction)
+		{
+			glLightModelfv(GL_LIGHT_MODEL_AMBIENT, color.mV);
+		}
+	}
+}
+
 bool LLRender::verifyTexUnitActive(U32 unitToVerify)
 {
 	if (mCurrTextureUnitIndex == unitToVerify)
diff --git a/indra/llrender/llrender.h b/indra/llrender/llrender.h
index 3f319022f6..7d636060f5 100644
--- a/indra/llrender/llrender.h
+++ b/indra/llrender/llrender.h
@@ -406,7 +406,8 @@ public:
 		       eBlendFactor alpha_sfactor, eBlendFactor alpha_dfactor);
 
 	LLLightState* getLight(U32 index);
-
+	void setAmbientLightColor(const LLColor4& color);
+	
 	LLTexUnit* getTexUnit(U32 index);
 
 	U32	getCurrentTexUnitIndex(void) const { return mCurrTextureUnitIndex; }
@@ -437,6 +438,7 @@ private:
 	glh::matrix4f mMatrix[NUM_MATRIX_MODES][LL_MATRIX_STACK_DEPTH];
 	U32 mCurMatHash[NUM_MATRIX_MODES];
 	U32 mLightHash;
+	LLColor4 mAmbientLightColor;
 	
 	bool			mDirty;
 	U32				mCount;