From d062b6cd2672f42fdfe20f6d932aacef9895aebc Mon Sep 17 00:00:00 2001
From: Brian <brian.paul@tungstengraphics.com>
Date: Wed, 23 May 2007 08:58:08 -0600
Subject: [PATCH] Fix point attentuation problem (bug 11042)

ctx->Point._Attentuation was computed in wrong place and the VB->Eye coord Z
array wasn't indexed correctly in run_point_stage().
---
 src/mesa/main/points.c     | 11 +++++------
 src/mesa/tnl/t_vb_points.c | 10 ++++++----
 2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/src/mesa/main/points.c b/src/mesa/main/points.c
index 9caa9ab3ab2..8674c7299c5 100644
--- a/src/mesa/main/points.c
+++ b/src/mesa/main/points.c
@@ -5,9 +5,9 @@
 
 /*
  * Mesa 3-D graphics library
- * Version:  6.5.1
+ * Version:  7.0
  *
- * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -61,10 +61,6 @@ _mesa_PointSize( GLfloat size )
 			    ctx->Point.MinSize,
 			    ctx->Point.MaxSize);
 
-   ctx->Point._Attenuated = (ctx->Point.Params[0] != 1.0 ||
-                             ctx->Point.Params[1] != 0.0 ||
-                             ctx->Point.Params[2] != 0.0);
-
    if (ctx->Driver.PointSize)
       ctx->Driver.PointSize(ctx, size);
 }
@@ -122,6 +118,9 @@ _mesa_PointParameterfvEXT( GLenum pname, const GLfloat *params)
 	       return;
 	    FLUSH_VERTICES(ctx, _NEW_POINT);
             COPY_3V(ctx->Point.Params, params);
+            ctx->Point._Attenuated = (ctx->Point.Params[0] != 1.0 ||
+                                      ctx->Point.Params[1] != 0.0 ||
+                                      ctx->Point.Params[2] != 0.0);
          }
          else {
             _mesa_error(ctx, GL_INVALID_ENUM,
diff --git a/src/mesa/tnl/t_vb_points.c b/src/mesa/tnl/t_vb_points.c
index 9327f8c273c..1ac14fedf99 100644
--- a/src/mesa/tnl/t_vb_points.c
+++ b/src/mesa/tnl/t_vb_points.c
@@ -1,8 +1,8 @@
 /*
  * Mesa 3-D graphics library
- * Version:  6.5
+ * Version:  7.0
  *
- * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -50,7 +50,8 @@ run_point_stage(GLcontext *ctx, struct tnl_pipeline_stage *stage)
    if (ctx->Point._Attenuated && !ctx->VertexProgram._Current) {
       struct point_stage_data *store = POINT_STAGE_DATA(stage);
       struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
-      const GLfloat (*eye)[4] = (const GLfloat (*)[4]) VB->EyePtr->data;
+      const GLfloat *eyeCoord = (GLfloat *) VB->EyePtr->data + 2;
+      const GLint eyeCoordStride = VB->EyePtr->stride / sizeof(GLfloat);
       const GLfloat p0 = ctx->Point.Params[0];
       const GLfloat p1 = ctx->Point.Params[1];
       const GLfloat p2 = ctx->Point.Params[2];
@@ -59,10 +60,11 @@ run_point_stage(GLcontext *ctx, struct tnl_pipeline_stage *stage)
       GLuint i;
 
       for (i = 0; i < VB->Count; i++) {
-         const GLfloat dist = FABSF(eye[i][2]);
+         const GLfloat dist = FABSF(*eyeCoord);
          const GLfloat q = p0 + dist * (p1 + dist * p2);
          const GLfloat atten = (q != 0.0) ? SQRTF(1.0 / q) : 1.0;
          size[i][0] = pointSize * atten; /* clamping done in rasterization */
+         eyeCoord += eyeCoordStride;
       }
 
       VB->AttribPtr[_TNL_ATTRIB_POINTSIZE] = &store->PointSize;
-- 
2.11.0