From 65c54a685a0ac7d08ad608c25d0e3c318f8be43f Mon Sep 17 00:00:00 2001
From: Patrice Mandin <pmandin@freedesktop.org>
Date: Fri, 8 Dec 2006 16:39:12 +0000
Subject: [PATCH] Resend spot light parameters when part of it changes

---
 src/mesa/drivers/dri/nouveau/nv10_state.c | 87 ++++++++++++++++-------
 1 file changed, 61 insertions(+), 26 deletions(-)

diff --git a/src/mesa/drivers/dri/nouveau/nv10_state.c b/src/mesa/drivers/dri/nouveau/nv10_state.c
index da26ccba871..bb9abe98671 100644
--- a/src/mesa/drivers/dri/nouveau/nv10_state.c
+++ b/src/mesa/drivers/dri/nouveau/nv10_state.c
@@ -326,11 +326,18 @@ static void nv10Hint(GLcontext *ctx, GLenum target, GLenum mode)
 
 // void (*IndexMask)(GLcontext *ctx, GLuint mask);
 
+enum {
+	SPOTLIGHT_UPDATE_EXPONENT,
+	SPOTLIGHT_UPDATE_DIRECTION,
+	SPOTLIGHT_UPDATE_ALL
+};
+
 static void nv10Lightfv(GLcontext *ctx, GLenum light, GLenum pname, const GLfloat *params )
 {
 	nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
 	GLint p = light - GL_LIGHT0;
 	struct gl_light *l = &ctx->Light.Light[p];
+	int spotlightUpdate = -1;
 
 	switch(pname)
 	{
@@ -352,41 +359,20 @@ static void nv10Lightfv(GLcontext *ctx, GLenum light, GLenum pname, const GLfloa
 			OUT_RING_CACHEf(params[1]);
 			OUT_RING_CACHEf(params[2]);
 			break;
-		case GL_SPOT_DIRECTION:
-			{
-				GLfloat x,y,z;
-				x = -2.0 * (1.0 + l->_CosCutoff) * l->_NormDirection[0];
-				y = -2.0 * (1.0 + l->_CosCutoff) * l->_NormDirection[1];
-				z = -2.0 * (1.0 + l->_CosCutoff) * l->_NormDirection[2];
-				BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_LIGHT_SPOT_DIR_X(p), 3);
-				OUT_RING_CACHEf(x);
-				OUT_RING_CACHEf(y);
-				OUT_RING_CACHEf(z);
-			}
-			break;
 		case GL_POSITION:
 			BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_LIGHT_POSITION_X(p), 3);
 			OUT_RING_CACHEf(params[0]);
 			OUT_RING_CACHEf(params[1]);
 			OUT_RING_CACHEf(params[2]);
 			break;
+		case GL_SPOT_DIRECTION:
+			spotlightUpdate = SPOTLIGHT_UPDATE_DIRECTION;
+			break;
 		case GL_SPOT_EXPONENT:
-			BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_LIGHT_SPOT_EXPONENT(p), 1);
-			OUT_RING_CACHEf(*params);
+			spotlightUpdate = SPOTLIGHT_UPDATE_DIRECTION;
 			break;
 		case GL_SPOT_CUTOFF:
-			/* you can't factor these */
-			{
-				GLfloat c;
-				c = -2.0 * (0.5 + l->_CosCutoff);
-
-				BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_LIGHT_SPOT_CUTOFF_A(p), 1);
-				OUT_RING_CACHEf(params[0]);
-				BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_LIGHT_SPOT_CUTOFF_B(p), 1);
-				OUT_RING_CACHEf(params[1]);
-				BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_LIGHT_SPOT_CUTOFF_C(p), 1);
-				OUT_RING_CACHEf(c);
-			}
+			spotlightUpdate = SPOTLIGHT_UPDATE_ALL;
 			break;
 		case GL_CONSTANT_ATTENUATION:
 			BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_LIGHT_CONSTANT_ATTENUATION(p), 1);
@@ -403,6 +389,55 @@ static void nv10Lightfv(GLcontext *ctx, GLenum light, GLenum pname, const GLfloa
 		default:
 			break;
 	}
+
+	switch(spotlightUpdate) {
+		case SPOTLIGHT_UPDATE_DIRECTION:
+			{
+				GLfloat x,y,z;
+				x = -2.0 * (1.0 + l->_CosCutoff) * l->_NormDirection[0];
+				y = -2.0 * (1.0 + l->_CosCutoff) * l->_NormDirection[1];
+				z = -2.0 * (1.0 + l->_CosCutoff) * l->_NormDirection[2];
+				BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_LIGHT_SPOT_DIR_X(p), 3);
+				OUT_RING_CACHEf(x);
+				OUT_RING_CACHEf(y);
+				OUT_RING_CACHEf(z);
+			}
+			break;
+		case SPOTLIGHT_UPDATE_EXPONENT:
+			{
+				GLfloat cc,lc,qc;
+				cc = 1.0;	/* These need to be correctly computed */
+				lc = 0.0;
+				qc = 2.0;
+				BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_LIGHT_SPOT_CUTOFF_A(p), 3);
+				OUT_RING_CACHEf(cc);
+				OUT_RING_CACHEf(lc);
+				OUT_RING_CACHEf(qc);
+			}
+			break;
+		case SPOTLIGHT_UPDATE_ALL:
+			{
+				GLfloat cc,lc,qc, x,y,z, c;
+				cc = 1.0;	/* These need to be correctly computed */
+				lc = 0.0;
+				qc = 2.0;
+				x = -2.0 * (1.0 + l->_CosCutoff) * l->_NormDirection[0];
+				y = -2.0 * (1.0 + l->_CosCutoff) * l->_NormDirection[1];
+				z = -2.0 * (1.0 + l->_CosCutoff) * l->_NormDirection[2];
+				c = -2.0 * (0.5 + l->_CosCutoff);
+				BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_LIGHT_SPOT_CUTOFF_A(p), 7);
+				OUT_RING_CACHEf(cc);
+				OUT_RING_CACHEf(lc);
+				OUT_RING_CACHEf(qc);
+				OUT_RING_CACHEf(x);
+				OUT_RING_CACHEf(y);
+				OUT_RING_CACHEf(z);
+				OUT_RING_CACHEf(c);
+			}
+			break;
+		default:
+			break;
+	}
 }
 
 /** Set the lighting model parameters */
-- 
2.30.2