GL_ARB_vertex_buffer_object working now, at least for non-indexed

vertex arrays.

11 files changed, 156 insertions, 90 deletions

diff --git a/src/mesa/array_cache/ac_context.c b/src/mesa/array_cache/ac_context.c
index e3c09fbd202..b259d5d0710 100644
--- a/src/mesa/array_cache/ac_context.c
+++ b/src/mesa/array_cache/ac_context.c
@@ -328,28 +328,40 @@ GLboolean _ac_CreateContext( GLcontext *ctx )
 
 void _ac_DestroyContext( GLcontext *ctx )
 {
+   struct gl_buffer_object *nullObj = ctx->Array.NullBufferObj;
    ACcontext *ac = AC_CONTEXT(ctx);
    GLint i;
 
-   if (ac->Cache.Vertex.Ptr) FREE( ac->Cache.Vertex.Ptr );
-   if (ac->Cache.Normal.Ptr) FREE( ac->Cache.Normal.Ptr );
-   if (ac->Cache.Color.Ptr) FREE( ac->Cache.Color.Ptr );
-   if (ac->Cache.SecondaryColor.Ptr) FREE( ac->Cache.SecondaryColor.Ptr );
-   if (ac->Cache.EdgeFlag.Ptr) FREE( ac->Cache.EdgeFlag.Ptr );
-   if (ac->Cache.Index.Ptr) FREE( ac->Cache.Index.Ptr );
-   if (ac->Cache.FogCoord.Ptr) FREE( ac->Cache.FogCoord.Ptr );
+   /* only free vertex data if it's really a pointer to vertex data and
+    * not an offset into a buffer object.
+    */
+   if (ac->Cache.Vertex.Ptr && ac->Cache.Vertex.BufferObj == nullObj)
+      FREE( ac->Cache.Vertex.Ptr );
+   if (ac->Cache.Normal.Ptr && ac->Cache.Normal.BufferObj == nullObj)
+      FREE( ac->Cache.Normal.Ptr );
+   if (ac->Cache.Color.Ptr && ac->Cache.Color.BufferObj == nullObj)
+      FREE( ac->Cache.Color.Ptr );
+   if (ac->Cache.SecondaryColor.Ptr && ac->Cache.SecondaryColor.BufferObj == nullObj)
+      FREE( ac->Cache.SecondaryColor.Ptr );
+   if (ac->Cache.EdgeFlag.Ptr && ac->Cache.EdgeFlag.BufferObj == nullObj)
+      FREE( ac->Cache.EdgeFlag.Ptr );
+   if (ac->Cache.Index.Ptr && ac->Cache.Index.BufferObj == nullObj)
+      FREE( ac->Cache.Index.Ptr );
+   if (ac->Cache.FogCoord.Ptr && ac->Cache.FogCoord.BufferObj == nullObj)
+      FREE( ac->Cache.FogCoord.Ptr );
 
    for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
-      if (ac->Cache.TexCoord[i].Ptr)
+      if (ac->Cache.TexCoord[i].Ptr && ac->Cache.TexCoord[i].BufferObj == nullObj)
 	 FREE( ac->Cache.TexCoord[i].Ptr );
    }
 
    for (i = 0; i < VERT_ATTRIB_MAX; i++) {
-      if (ac->Cache.Attrib[i].Ptr)
+      if (ac->Cache.Attrib[i].Ptr && ac->Cache.Attrib[i].BufferObj == nullObj)
 	 FREE( ac->Cache.Attrib[i].Ptr );
    }
 
-   if (ac->Elts) FREE( ac->Elts );
+   if (ac->Elts)
+      FREE( ac->Elts );
 
    /* Free the context structure itself */
    FREE(ac);
diff --git a/src/mesa/array_cache/ac_import.c b/src/mesa/array_cache/ac_import.c
index b2b7eeb219b..78f54356359 100644
--- a/src/mesa/array_cache/ac_import.c
+++ b/src/mesa/array_cache/ac_import.c
@@ -34,17 +34,17 @@
 #include "array_cache/ac_context.h"
 #include "math/m_translate.h"
 
-#define STRIDE_ARRAY( array, offset ) 		\
-do {						\
-   GLubyte *tmp = (array).Ptr;			\
-   tmp += (offset) * (array).StrideB;		\
-   (array).Ptr = tmp;				\
+#define STRIDE_ARRAY( array, offset ) 					\
+do {									\
+   GLubyte *tmp = ADD_POINTERS( (array).BufferObj->Data, (array).Ptr )	\
+                + (offset) * (array).StrideB;				\
+   (array).Ptr = tmp;							\
 } while (0)
 
+
 /* Set the array pointer back to its source when the cached data is
  * invalidated:
  */
-
 static void reset_texcoord( GLcontext *ctx, GLuint unit )
 {
    ACcontext *ac = AC_CONTEXT(ctx);
@@ -202,15 +202,23 @@ static void import( GLcontext *ctx,
 		    struct gl_client_array *to,
 		    struct gl_client_array *from )
 {
+   GLubyte *dest;
+   const GLubyte *src;
    ACcontext *ac = AC_CONTEXT(ctx);
 
    if (type == 0) 
       type = from->Type;
 
+   /* The dest and source data addresses are the sum of the buffer
+    * object's start plus the vertex array pointer/offset.
+    */
+   dest = ADD_POINTERS(to->BufferObj->Data, to->Ptr);
+   src = ADD_POINTERS(from->BufferObj->Data, from->Ptr);
+
    switch (type) {
    case GL_FLOAT:
-      _math_trans_4fc( (GLfloat (*)[4]) to->Ptr,
-		       from->Ptr,
+      _math_trans_4fc( (GLfloat (*)[4]) dest,
+                       src,
 		       from->StrideB,
 		       from->Type,
 		       from->Size,
@@ -222,8 +230,8 @@ static void import( GLcontext *ctx,
       break;
       
    case GL_UNSIGNED_BYTE:
-      _math_trans_4ub( (GLubyte (*)[4]) to->Ptr,
-		       from->Ptr,
+      _math_trans_4ub( (GLubyte (*)[4]) dest,
+                       src,
 		       from->StrideB,
 		       from->Type,
 		       from->Size,
@@ -235,8 +243,8 @@ static void import( GLcontext *ctx,
       break;
 
    case GL_UNSIGNED_SHORT:
-      _math_trans_4us( (GLushort (*)[4]) to->Ptr,
-		       from->Ptr,
+      _math_trans_4us( (GLushort (*)[4]) dest,
+                       src,
 		       from->StrideB,
 		       from->Type,
 		       from->Size,
diff --git a/src/mesa/drivers/osmesa/osmesa.c b/src/mesa/drivers/osmesa/osmesa.c
index 8d833f8d1c0..396f9af6b05 100644
--- a/src/mesa/drivers/osmesa/osmesa.c
+++ b/src/mesa/drivers/osmesa/osmesa.c
@@ -36,6 +36,7 @@
 #include "glheader.h"
 #include "GL/osmesa.h"
 #include "buffers.h"
+#include "bufferobj.h"
 #include "context.h"
 #include "colormac.h"
 #include "depth.h"
@@ -681,6 +682,16 @@ hook_in_driver_functions( GLcontext *ctx )
    ctx->Driver.CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
    ctx->Driver.CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
 
+#if FEATURE_ARB_vertex_buffer_object
+   ctx->Driver.NewBufferObject = _mesa_new_buffer_object;
+   ctx->Driver.DeleteBuffer = _mesa_delete_buffer_object;
+   ctx->Driver.BindBuffer = NULL;
+   ctx->Driver.BufferData = _mesa_buffer_data;
+   ctx->Driver.BufferSubData = _mesa_buffer_subdata;
+   ctx->Driver.MapBuffer = _mesa_buffer_map;
+   ctx->Driver.UnmapBuffer = NULL;
+#endif
+
    swdd->SetBuffer = set_buffer;
 
    /* RGB(A) span/pixel functions */
diff --git a/src/mesa/drivers/x11/xm_dd.c b/src/mesa/drivers/x11/xm_dd.c
index 3a3375f34c4..a99c0d4b5fb 100644
--- a/src/mesa/drivers/x11/xm_dd.c
+++ b/src/mesa/drivers/x11/xm_dd.c
@@ -24,6 +24,7 @@
 
 
 #include "glxheader.h"
+#include "bufferobj.h"
 #include "context.h"
 #include "colormac.h"
 #include "depth.h"
@@ -92,7 +93,7 @@ get_buffer_size( GLframebuffer *buffer, GLuint *width, GLuint *height )
 
 
 static void
-finish( GLcontext *ctx )
+finish_or_flush( GLcontext *ctx )
 {
 #ifdef XFree86Server
       /* NOT_NEEDED */
@@ -107,22 +108,6 @@ finish( GLcontext *ctx )
 }
 
 
-static void
-flush( GLcontext *ctx )
-{
-#ifdef XFree86Server
-      /* NOT_NEEDED */
-#else
-   const XMesaContext xmesa = XMESA_CONTEXT(ctx);
-   if (xmesa) {
-      _glthread_LOCK_MUTEX(_xmesa_lock);
-      XFlush( xmesa->display );
-      _glthread_UNLOCK_MUTEX(_xmesa_lock);
-   }
-#endif
-}
-
-
 
 /*
  * This chooses the color buffer for reading and writing spans, points,
@@ -832,7 +817,10 @@ drawpixels_8R8G8B( GLcontext *ctx,
 #endif
 
 
-
+/*
+ * Every driver should implement a GetString function in order to
+ * return a meaningful GL_RENDERER string.
+ */
 static const GLubyte *
 get_string( GLcontext *ctx, GLenum name )
 {
@@ -856,6 +844,10 @@ get_string( GLcontext *ctx, GLenum name )
 }
 
 
+/*
+ * We implement the glEnable function only because we care about
+ * dither enable/disable.
+ */
 static void
 enable( GLcontext *ctx, GLenum pname, GLboolean state )
 {
@@ -970,11 +962,17 @@ void xmesa_init_pointers( GLcontext *ctx )
    TNLcontext *tnl;
    struct swrast_device_driver *dd = _swrast_GetDeviceDriverReference( ctx );
 
+   /* Plug in our driver-specific functions here */
    ctx->Driver.GetString = get_string;
    ctx->Driver.GetBufferSize = get_buffer_size;
-   ctx->Driver.Flush = flush;
-   ctx->Driver.Finish = finish;
-    
+   ctx->Driver.Flush = finish_or_flush;
+   ctx->Driver.Finish = finish_or_flush;
+   ctx->Driver.ClearIndex = clear_index;
+   ctx->Driver.ClearColor = clear_color;
+   ctx->Driver.IndexMask = index_mask;
+   ctx->Driver.ColorMask = color_mask;
+   ctx->Driver.Enable = enable;
+
    /* Software rasterizer pixel paths:
     */
    ctx->Driver.Accum = _swrast_Accum;
@@ -1017,15 +1015,15 @@ void xmesa_init_pointers( GLcontext *ctx )
    ctx->Driver.CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
    ctx->Driver.CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
 
-
-   /* Statechange callbacks:
-    */
-   ctx->Driver.ClearIndex = clear_index;
-   ctx->Driver.ClearColor = clear_color;
-   ctx->Driver.IndexMask = index_mask;
-   ctx->Driver.ColorMask = color_mask;
-   ctx->Driver.Enable = enable;
-
+#if FEATURE_ARB_vertex_buffer_object
+   ctx->Driver.NewBufferObject = _mesa_new_buffer_object;
+   ctx->Driver.DeleteBuffer = _mesa_delete_buffer_object;
+   ctx->Driver.BindBuffer = NULL;
+   ctx->Driver.BufferData = _mesa_buffer_data;
+   ctx->Driver.BufferSubData = _mesa_buffer_subdata;
+   ctx->Driver.MapBuffer = _mesa_buffer_map;
+   ctx->Driver.UnmapBuffer = NULL;
+#endif
 
    /* Initialize the TNL driver interface:
     */
diff --git a/src/mesa/main/api_arrayelt.c b/src/mesa/main/api_arrayelt.c
index edfa8e53cf4..e4533713cd9 100644
--- a/src/mesa/main/api_arrayelt.c
+++ b/src/mesa/main/api_arrayelt.c
@@ -1,4 +1,3 @@
-
 /*
  * Mesa 3-D graphics library
  * Version:  5.1
@@ -346,13 +345,19 @@ void _ae_loopback_array_elt( GLint elt )
       _ae_update_state( ctx );
 
    for (ta = actx->texarrays ; ta->func ; ta++) {
-      ta->func( ta->unit + GL_TEXTURE0_ARB, (char *)ta->array->Ptr + elt * ta->array->StrideB );
+      GLubyte *src = ta->array->BufferObj->Data
+                   + (GLuint) ta->array->Ptr
+                   + elt * ta->array->StrideB;
+      ta->func( ta->unit + GL_TEXTURE0_ARB, src);
    }
 
    /* Must be last
     */
    for (aa = actx->arrays ; aa->func ; aa++) {
-      aa->func( (char *)aa->array->Ptr + elt * aa->array->StrideB );
+      GLubyte *src = aa->array->BufferObj->Data
+                   + (GLuint) aa->array->Ptr
+                   + elt * aa->array->StrideB;
+      aa->func( src );
    }
 }
 
diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index 532649a354c..df0d6d771de 100644
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -92,6 +92,16 @@ extern "C" {
 /*@}*/
 
 
+/*
+ * For GL_ARB_vertex_buffer_object we need to treat vertex array pointers
+ * as offsets into buffer stores.  Since the vertex array pointer and
+ * buffer store pointer are both pointers and we need to add them, we use
+ * this macro.
+ * Both pointers/offsets are expressed in bytes.
+ */
+#define ADD_POINTERS(A, B)  ( (A) + (unsigned long) (B) )
+
+
 /**********************************************************************/
 /** \name [Pseudo] static array declaration.
  *
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 341a028ee6f..36954675c8a 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1262,7 +1262,7 @@ struct gl_buffer_object {
    GLenum Access;
    GLvoid *Pointer;   /**< Only valid while buffer is mapped */
    GLuint Size;       /**< Size of data array in bytes */
-   GLubyte *Data;        /**< The storage */
+   GLubyte *Data;     /**< The storage */
 };
 
 
diff --git a/src/mesa/tnl/t_array_import.c b/src/mesa/tnl/t_array_import.c
index 1bdf1c64e51..ab11f50c8fe 100644
--- a/src/mesa/tnl/t_array_import.c
+++ b/src/mesa/tnl/t_array_import.c
@@ -1,4 +1,3 @@
-
 /*
  * Mesa 3-D graphics library
  * Version:  5.1
@@ -48,6 +47,7 @@ static void _tnl_import_vertex( GLcontext *ctx,
    struct gl_client_array *tmp;
    GLboolean is_writeable = 0;
    struct vertex_arrays *inputs = &TNL_CONTEXT(ctx)->array_inputs;
+   GLubyte *data;
 
    tmp = _ac_import_vertex(ctx,
 			   GL_FLOAT,
@@ -56,8 +56,9 @@ static void _tnl_import_vertex( GLcontext *ctx,
 			   writeable,
 			   &is_writeable);
 
-   inputs->Obj.data = (GLfloat (*)[4]) tmp->Ptr;
-   inputs->Obj.start = (GLfloat *) tmp->Ptr;
+   data = ADD_POINTERS(tmp->Ptr, tmp->BufferObj->Data);
+   inputs->Obj.data = (GLfloat (*)[4]) data;
+   inputs->Obj.start = (GLfloat *) data;
    inputs->Obj.stride = tmp->StrideB;
    inputs->Obj.size = tmp->Size;
    inputs->Obj.flags &= ~(VEC_BAD_STRIDE|VEC_NOT_WRITEABLE);
@@ -74,13 +75,15 @@ static void _tnl_import_normal( GLcontext *ctx,
    struct gl_client_array *tmp;
    GLboolean is_writeable = 0;
    struct vertex_arrays *inputs = &TNL_CONTEXT(ctx)->array_inputs;
+   GLubyte *data;
 
    tmp = _ac_import_normal(ctx, GL_FLOAT,
 			   stride ? 3*sizeof(GLfloat) : 0, writeable,
 			   &is_writeable);
 
-   inputs->Normal.data = (GLfloat (*)[4]) tmp->Ptr;
-   inputs->Normal.start = (GLfloat *) tmp->Ptr;
+   data = ADD_POINTERS(tmp->Ptr, tmp->BufferObj->Data);
+   inputs->Normal.data = (GLfloat (*)[4]) data;
+   inputs->Normal.start = (GLfloat *) data;
    inputs->Normal.stride = tmp->StrideB;
    inputs->Normal.flags &= ~(VEC_BAD_STRIDE|VEC_NOT_WRITEABLE);
    if (inputs->Normal.stride != 3*sizeof(GLfloat))
@@ -134,15 +137,17 @@ static void _tnl_import_fogcoord( GLcontext *ctx,
 				  GLboolean stride )
 {
    struct vertex_arrays *inputs = &TNL_CONTEXT(ctx)->array_inputs;
-    struct gl_client_array *tmp;
+   struct gl_client_array *tmp;
    GLboolean is_writeable = 0;
+   GLubyte *data;
 
    tmp = _ac_import_fogcoord(ctx, GL_FLOAT,
 			     stride ? sizeof(GLfloat) : 0, writeable,
 			     &is_writeable);
 
-   inputs->FogCoord.data = (GLfloat (*)[4]) tmp->Ptr;
-   inputs->FogCoord.start = (GLfloat *) tmp->Ptr;
+   data = ADD_POINTERS(tmp->Ptr, tmp->BufferObj->Data);
+   inputs->FogCoord.data = (GLfloat (*)[4]) data;
+   inputs->FogCoord.start = (GLfloat *) data;
    inputs->FogCoord.stride = tmp->StrideB;
    inputs->FogCoord.flags &= ~(VEC_BAD_STRIDE|VEC_NOT_WRITEABLE);
    if (inputs->FogCoord.stride != sizeof(GLfloat))
@@ -158,13 +163,15 @@ static void _tnl_import_index( GLcontext *ctx,
    struct vertex_arrays *inputs = &TNL_CONTEXT(ctx)->array_inputs;
    struct gl_client_array *tmp;
    GLboolean is_writeable = 0;
+   GLubyte *data;
 
    tmp = _ac_import_index(ctx, GL_UNSIGNED_INT,
 			  stride ? sizeof(GLuint) : 0, writeable,
 			  &is_writeable);
 
-   inputs->Index.data = (GLuint *) tmp->Ptr;
-   inputs->Index.start = (GLuint *) tmp->Ptr;
+   data = ADD_POINTERS(tmp->Ptr, tmp->BufferObj->Data);
+   inputs->Index.data = (GLuint *) data;
+   inputs->Index.start = (GLuint *) data;
    inputs->Index.stride = tmp->StrideB;
    inputs->Index.flags &= ~(VEC_BAD_STRIDE|VEC_NOT_WRITEABLE);
    if (inputs->Index.stride != sizeof(GLuint))
@@ -182,6 +189,7 @@ static void _tnl_import_texcoord( GLcontext *ctx,
    struct vertex_arrays *inputs = &TNL_CONTEXT(ctx)->array_inputs;
    struct gl_client_array *tmp;
    GLboolean is_writeable = 0;
+   GLubyte *data;
 
    tmp = _ac_import_texcoord(ctx, unit, GL_FLOAT,
 			     stride ? 4 * sizeof(GLfloat) : 0,
@@ -189,8 +197,9 @@ static void _tnl_import_texcoord( GLcontext *ctx,
 			     writeable,
 			     &is_writeable);
 
-   inputs->TexCoord[unit].data = (GLfloat (*)[4]) tmp->Ptr;
-   inputs->TexCoord[unit].start = (GLfloat *) tmp->Ptr;
+   data = ADD_POINTERS(tmp->Ptr, tmp->BufferObj->Data);
+   inputs->TexCoord[unit].data = (GLfloat (*)[4]) data;
+   inputs->TexCoord[unit].start = (GLfloat *) data;
    inputs->TexCoord[unit].stride = tmp->StrideB;
    inputs->TexCoord[unit].size = tmp->Size;
    inputs->TexCoord[unit].flags &= ~(VEC_BAD_STRIDE|VEC_NOT_WRITEABLE);
@@ -208,14 +217,16 @@ static void _tnl_import_edgeflag( GLcontext *ctx,
    struct vertex_arrays *inputs = &TNL_CONTEXT(ctx)->array_inputs;
    struct gl_client_array *tmp;
    GLboolean is_writeable = 0;
+   GLubyte *data;
 
    tmp = _ac_import_edgeflag(ctx, GL_UNSIGNED_BYTE,
 			     stride ? sizeof(GLubyte) : 0,
 			     0,
 			     &is_writeable);
 
-   inputs->EdgeFlag.data = (GLubyte *) tmp->Ptr;
-   inputs->EdgeFlag.start = (GLubyte *) tmp->Ptr;
+   data = ADD_POINTERS(tmp->Ptr, tmp->BufferObj->Data);
+   inputs->EdgeFlag.data = (GLubyte *) data;
+   inputs->EdgeFlag.start = (GLubyte *) data;
    inputs->EdgeFlag.stride = tmp->StrideB;
    inputs->EdgeFlag.flags &= ~(VEC_BAD_STRIDE|VEC_NOT_WRITEABLE);
    if (inputs->EdgeFlag.stride != sizeof(GLubyte))
@@ -234,6 +245,7 @@ static void _tnl_import_attrib( GLcontext *ctx,
    struct vertex_arrays *inputs = &TNL_CONTEXT(ctx)->array_inputs;
    struct gl_client_array *tmp;
    GLboolean is_writeable = 0;
+   GLubyte *data;
 
    tmp = _ac_import_attrib(ctx, index, GL_FLOAT,
                            stride ? 4 * sizeof(GLfloat) : 0,
@@ -241,8 +253,9 @@ static void _tnl_import_attrib( GLcontext *ctx,
                            writeable,
                            &is_writeable);
 
-   inputs->Attribs[index].data = (GLfloat (*)[4]) tmp->Ptr;
-   inputs->Attribs[index].start = (GLfloat *) tmp->Ptr;
+   data = ADD_POINTERS(tmp->Ptr, tmp->BufferObj->Data);
+   inputs->Attribs[index].data = (GLfloat (*)[4]) data;
+   inputs->Attribs[index].start = (GLfloat *) data;
    inputs->Attribs[index].stride = tmp->StrideB;
    inputs->Attribs[index].size = tmp->Size;
    inputs->Attribs[index].flags &= ~(VEC_BAD_STRIDE|VEC_NOT_WRITEABLE);
diff --git a/src/mesa/tnl/t_imm_elt.c b/src/mesa/tnl/t_imm_elt.c
index 44c2a32c858..fdecef61af0 100644
--- a/src/mesa/tnl/t_imm_elt.c
+++ b/src/mesa/tnl/t_imm_elt.c
@@ -516,14 +516,15 @@ static void _tnl_trans_elt_1ui(GLuint *to,
 			GLuint start,
 			GLuint n )
 {
+   GLubyte *fromData = ADD_POINTERS( from->Ptr, from->BufferObj->Data );
    _tnl_trans_elt_1ui_tab[TYPE_IDX(from->Type)]( to,
-					       from->Ptr,
-					       from->StrideB,
-					       flags,
-					       elts,
-					       match,
-					       start,
-					       n );
+                                                 fromData,
+                                                 from->StrideB,
+                                                 flags,
+                                                 elts,
+                                                 match,
+                                                 start,
+                                                 n );
 
 }
 
@@ -536,8 +537,9 @@ static void _tnl_trans_elt_1ub(GLubyte *to,
 			GLuint start,
 			GLuint n )
 {
+   GLubyte *fromData = ADD_POINTERS( from->Ptr, from->BufferObj->Data );
    _tnl_trans_elt_1ub_tab[TYPE_IDX(from->Type)]( to,
-                                                 from->Ptr,
+                                                 fromData,
                                                  from->StrideB,
                                                  flags,
                                                  elts,
@@ -555,8 +557,9 @@ static void _tnl_trans_elt_4f(GLfloat (*to)[4],
                               GLuint start,
                               GLuint n )
 {
+   GLubyte *fromData = ADD_POINTERS( from->Ptr, from->BufferObj->Data );
    _tnl_trans_elt_4f_tab[from->Size][TYPE_IDX(from->Type)]( to,
-					      from->Ptr,
+					      fromData,
 					      from->StrideB,
 					      flags,
 					      elts,
@@ -575,8 +578,9 @@ static void _tnl_trans_elt_4fc(GLfloat (*to)[4],
 			       GLuint start,
 			       GLuint n )
 {
+   GLubyte *fromData = ADD_POINTERS( from->Ptr, from->BufferObj->Data );
    _tnl_trans_elt_4fc_tab[from->Size][TYPE_IDX(from->Type)]( to,
-					      from->Ptr,
+					      fromData,
 					      from->StrideB,
 					      flags,
 					      elts,
diff --git a/src/mesa/tnl/t_imm_eval.c b/src/mesa/tnl/t_imm_eval.c
index 8411d7da470..560e0c59334 100644
--- a/src/mesa/tnl/t_imm_eval.c
+++ b/src/mesa/tnl/t_imm_eval.c
@@ -1,4 +1,3 @@
-
 /*
  * Mesa 3-D graphics library
  * Version:  5.1
@@ -120,7 +119,8 @@ static void eval1_4f_ca( struct gl_client_array *dest,
 {
    const GLfloat u1 = map->u1;
    const GLfloat du = map->du;
-   GLfloat (*to)[4] = (GLfloat (*)[4])dest->Ptr;
+   GLubyte *destData = ADD_POINTERS(dest->Ptr, dest->BufferObj->Data);
+   GLfloat (*to)[4] = (GLfloat (*)[4]) destData;
    GLuint i;
 
    ASSERT(dest->Type == GL_FLOAT);
@@ -258,7 +258,8 @@ static void eval2_4f_ca( struct gl_client_array *dest,
    const GLfloat du = map->du;
    const GLfloat v1 = map->v1;
    const GLfloat dv = map->dv;
-   GLfloat (*to)[4] = (GLfloat (*)[4])dest->Ptr;
+   GLubyte *destData = ADD_POINTERS(dest->Ptr, dest->BufferObj->Data);
+   GLfloat (*to)[4] = (GLfloat (*)[4]) destData;
    GLuint i;
 
    ASSERT(dest->Type == GL_FLOAT);
@@ -540,11 +541,13 @@ void _tnl_eval_immediate( GLcontext *ctx, struct immediate *IM )
    if (req & VERT_BIT_COLOR0) {
       GLuint generated = 0;
 
-      if (copycount) 
-	 copy_4f_stride( store->Attrib[VERT_ATTRIB_COLOR0] + IM->CopyStart, 
-			 (GLfloat *)tmp->Color.Ptr, 
-			 tmp->Color.StrideB,
-			 copycount );
+      if (copycount) {
+         GLubyte *destData = ADD_POINTERS(tmp->Color.Ptr, tmp->Color.BufferObj->Data);
+         copy_4f_stride( store->Attrib[VERT_ATTRIB_COLOR0] + IM->CopyStart, 
+                         (GLfloat *) destData,
+                         tmp->Color.StrideB,
+                         copycount );
+      }
 
       tmp->Color.Ptr = (GLubyte *) (store->Attrib[VERT_ATTRIB_COLOR0] + IM->CopyStart);
       tmp->Color.StrideB = 4 * sizeof(GLfloat);
diff --git a/src/mesa/tnl/t_imm_exec.c b/src/mesa/tnl/t_imm_exec.c
index 85f63dd8fbc..14d214e8438 100644
--- a/src/mesa/tnl/t_imm_exec.c
+++ b/src/mesa/tnl/t_imm_exec.c
@@ -538,6 +538,7 @@ void _tnl_imm_init( GLcontext *ctx )
    tmp->Color.Stride = 0;
    tmp->Color.StrideB = 4 * sizeof(GLfloat);
    tmp->Color.Flags = 0;
+   tmp->Color.BufferObj = ctx->Array.NullBufferObj;
 
    tmp->SecondaryColor.Ptr = NULL;
    tmp->SecondaryColor.Type = GL_FLOAT;
@@ -545,6 +546,7 @@ void _tnl_imm_init( GLcontext *ctx )
    tmp->SecondaryColor.Stride = 0;
    tmp->SecondaryColor.StrideB = 4 * sizeof(GLfloat);
    tmp->SecondaryColor.Flags = 0;
+   tmp->SecondaryColor.BufferObj = ctx->Array.NullBufferObj;
 
    _mesa_vector4f_init( &tmp->FogCoord, 0, 0 );
    _mesa_vector1ui_init( &tmp->Index, 0, 0 );