MAINT-685: Fix for disabling basic shaders making high detail terrain render incorrectly. http://hg.secondlife.com/viewer-development/changeset/218a7b78dcc5f53f38de063f3a229a7462fe052f

indra/llrender/llglstates.h

@@ -59,7 +59,6 @@ protected:
 	LLGLEnable mColorMaterial;
 	LLGLDisable mAlphaTest, mBlend, mCullFace, mDither, mFog, 
 		mLineSmooth, mLineStipple, mNormalize, mPolygonSmooth,
-		mTextureGenQ, mTextureGenR, mTextureGenS, mTextureGenT,
 		mGLMultisample;
 public:
 	LLGLSDefault()
@@ -76,10 +75,6 @@ public:
 		mLineStipple(GL_LINE_STIPPLE),
 		mNormalize(GL_NORMALIZE),
 		mPolygonSmooth(GL_POLYGON_SMOOTH),
-		mTextureGenQ(GL_TEXTURE_GEN_Q), 
-		mTextureGenR(GL_TEXTURE_GEN_R),
-		mTextureGenS(GL_TEXTURE_GEN_S), 
-		mTextureGenT(GL_TEXTURE_GEN_T),
 		mGLMultisample(GL_MULTISAMPLE_ARB)
 	{ }
 };

indra/llrender/llrender.cpp

@@ -1451,6 +1451,16 @@ void LLRender::matrixMode(U32 mode)
 	mMatrixMode = mode;
 }
 
+U32 LLRender::getMatrixMode()
+{
+	if (mMatrixMode >= MM_TEXTURE0 && mMatrixMode <= MM_TEXTURE3)
+	{ //always return MM_TEXTURE if current matrix mode points at any texture matrix
+		return MM_TEXTURE;
+	}
+	return mMatrixMode;
+}
+
+
 void LLRender::loadIdentity()
 {
 	flush();

indra/llrender/llrender.h

@@ -345,6 +345,7 @@ public:
 	void loadIdentity();
 	void multMatrix(const GLfloat* m);
 	void matrixMode(U32 mode);	
+	U32 getMatrixMode();
 
 	const glh::matrix4f& getModelviewMatrix();
 	const glh::matrix4f& getProjectionMatrix();