From 05b26510668fc1e5039c6c9088247f9b3c508cb7 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Mon, 31 Mar 2003 18:19:56 +0000
Subject: reduce memory needed for vertex attributes (allocate on demand)

---
 src/mesa/tnl/t_context.h | 24 ++++++++++--------------
 1 file changed, 10 insertions(+), 14 deletions(-)

(limited to 'src/mesa/tnl/t_context.h')

diff --git a/src/mesa/tnl/t_context.h b/src/mesa/tnl/t_context.h
index d08da93abd..b7153c545f 100644
--- a/src/mesa/tnl/t_context.h
+++ b/src/mesa/tnl/t_context.h
@@ -1,4 +1,4 @@
-/* $Id: t_context.h,v 1.45 2003/03/28 01:39:04 brianp Exp $ */
+/* $Id: t_context.h,v 1.46 2003/03/31 18:19:56 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -192,16 +192,12 @@ struct immediate
    GLuint  PrimitiveLength[IMM_SIZE]; /* BEGIN/END */
    GLuint  Flag[IMM_SIZE];	      /* VERT_BIT_* flags */
 
-   /* All vertex attributes (position, normal, color, secondary color,
-    * texcoords, fog coord) are stored in the Attrib[] arrays instead
-    * of individual arrays as we did prior to Mesa 4.1.
-    *
-    * XXX may need to use 32-byte aligned allocation for this!!!
-    * XXX replace this with GLfloat *Attrib[VERT_ATTRIB_MAX] and allocate
-    * the attribute arrays as needed, so save memory.  As is, we're using
-    * 256 bytes per vertex (16 attribs * 4 comps/attrib * 4 bytes/comp).
+   /* Attrib is an array [MAX_VERT_ATTRIBS] of pointer to array [][4]
+    * of GLfloat.
+    * We only pre-allocate the vertex position array.  The other vertex
+    * attribute arrays are only allocated when needed to save memory.
     */
-   GLfloat Attrib[VERT_ATTRIB_MAX][IMM_SIZE][4];  /* GL_NV_vertex_program */
+   GLfloat (*Attrib[VERT_ATTRIB_MAX])[4];
 
    GLfloat *NormalLengthPtr; /* length of normal vectors (display list only) */
 
@@ -213,16 +209,16 @@ struct immediate
 
 struct vertex_arrays
 {
-   /* XXX move a bunch of these fields into the Attribs[] array??? */
+   /* Conventional vertex attribute arrays */
    GLvector4f  Obj;
    GLvector4f  Normal;
    struct gl_client_array Color;
    struct gl_client_array SecondaryColor;
-   GLvector1ui Index;
-   GLvector1ub EdgeFlag;
+   GLvector4f  FogCoord;
    GLvector4f  TexCoord[MAX_TEXTURE_COORD_UNITS];
+   GLvector1ub EdgeFlag;
+   GLvector1ui Index;
    GLvector1ui Elt;
-   GLvector4f  FogCoord;
 
    /* These attributes don't alias with the conventional attributes.
     * The GL_NV_vertex_program extension defines 16 extra sets of vertex
-- 
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