vbo: access VBO memory more efficiently when building display lists

[mesa.git] / src / mesa / vbo / vbo_save_api.c

/**************************************************************************

Copyright 2002-2008 Tungsten Graphics Inc., Cedar Park, Texas.

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/*
 * Authors:
 *   Keith Whitwell <keith@tungstengraphics.com>
 */



/* Display list compiler attempts to store lists of vertices with the
 * same vertex layout.  Additionally it attempts to minimize the need
 * for execute-time fixup of these vertex lists, allowing them to be
 * cached on hardware.
 *
 * There are still some circumstances where this can be thwarted, for
 * example by building a list that consists of one very long primitive
 * (eg Begin(Triangles), 1000 vertices, End), and calling that list
 * from inside a different begin/end object (Begin(Lines), CallList,
 * End).
 *
 * In that case the code will have to replay the list as individual
 * commands through the Exec dispatch table, or fix up the copied
 * vertices at execute-time.
 *
 * The other case where fixup is required is when a vertex attribute
 * is introduced in the middle of a primitive.  Eg:
 *  Begin(Lines)
 *  TexCoord1f()           Vertex2f()
 *  TexCoord1f() Color3f() Vertex2f()
 *  End()
 *
 *  If the current value of Color isn't known at compile-time, this
 *  primitive will require fixup.
 *
 *
 * The list compiler currently doesn't attempt to compile lists
 * containing EvalCoord or EvalPoint commands.  On encountering one of
 * these, compilation falls back to opcodes.
 *
 * This could be improved to fallback only when a mix of EvalCoord and
 * Vertex commands are issued within a single primitive.
 */


#include "main/glheader.h"
#include "main/bufferobj.h"
#include "main/context.h"
#include "main/dlist.h"
#include "main/enums.h"
#include "main/eval.h"
#include "main/macros.h"
#include "main/api_validate.h"
#include "main/api_arrayelt.h"
#include "main/vtxfmt.h"
#include "main/dispatch.h"

#include "vbo_context.h"
#include "vbo_noop.h"


#ifdef ERROR
#undef ERROR
#endif


/* An interesting VBO number/name to help with debugging */
#define VBO_BUF_ID  12345


/*
 * NOTE: Old 'parity' issue is gone, but copying can still be
 * wrong-footed on replay.
 */
static GLuint
_save_copy_vertices(struct gl_context *ctx,
                    const struct vbo_save_vertex_list *node,
                    const GLfloat * src_buffer)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   const struct _mesa_prim *prim = &node->prim[node->prim_count - 1];
   GLuint nr = prim->count;
   GLuint sz = save->vertex_size;
   const GLfloat *src = src_buffer + prim->start * sz;
   GLfloat *dst = save->copied.buffer;
   GLuint ovf, i;

   if (prim->end)
      return 0;

   switch (prim->mode) {
   case GL_POINTS:
      return 0;
   case GL_LINES:
      ovf = nr & 1;
      for (i = 0; i < ovf; i++)
         memcpy(dst + i * sz, src + (nr - ovf + i) * sz,
                sz * sizeof(GLfloat));
      return i;
   case GL_TRIANGLES:
      ovf = nr % 3;
      for (i = 0; i < ovf; i++)
         memcpy(dst + i * sz, src + (nr - ovf + i) * sz,
                sz * sizeof(GLfloat));
      return i;
   case GL_QUADS:
      ovf = nr & 3;
      for (i = 0; i < ovf; i++)
         memcpy(dst + i * sz, src + (nr - ovf + i) * sz,
                sz * sizeof(GLfloat));
      return i;
   case GL_LINE_STRIP:
      if (nr == 0)
         return 0;
      else {
         memcpy(dst, src + (nr - 1) * sz, sz * sizeof(GLfloat));
         return 1;
      }
   case GL_LINE_LOOP:
   case GL_TRIANGLE_FAN:
   case GL_POLYGON:
      if (nr == 0)
         return 0;
      else if (nr == 1) {
         memcpy(dst, src + 0, sz * sizeof(GLfloat));
         return 1;
      }
      else {
         memcpy(dst, src + 0, sz * sizeof(GLfloat));
         memcpy(dst + sz, src + (nr - 1) * sz, sz * sizeof(GLfloat));
         return 2;
      }
   case GL_TRIANGLE_STRIP:
   case GL_QUAD_STRIP:
      switch (nr) {
      case 0:
         ovf = 0;
         break;
      case 1:
         ovf = 1;
         break;
      default:
         ovf = 2 + (nr & 1);
         break;
      }
      for (i = 0; i < ovf; i++)
         memcpy(dst + i * sz, src + (nr - ovf + i) * sz,
                sz * sizeof(GLfloat));
      return i;
   default:
      assert(0);
      return 0;
   }
}


static struct vbo_save_vertex_store *
alloc_vertex_store(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   struct vbo_save_vertex_store *vertex_store =
      CALLOC_STRUCT(vbo_save_vertex_store);

   /* obj->Name needs to be non-zero, but won't ever be examined more
    * closely than that.  In particular these buffers won't be entered
    * into the hash and can never be confused with ones visible to the
    * user.  Perhaps there could be a special number for internal
    * buffers:
    */
   vertex_store->bufferobj = ctx->Driver.NewBufferObject(ctx,
                                                         VBO_BUF_ID,
                                                         GL_ARRAY_BUFFER_ARB);
   if (vertex_store->bufferobj) {
      save->out_of_memory =
         !ctx->Driver.BufferData(ctx,
                                 GL_ARRAY_BUFFER_ARB,
                                 VBO_SAVE_BUFFER_SIZE * sizeof(GLfloat),
                                 NULL, GL_STATIC_DRAW_ARB,
                                 vertex_store->bufferobj);
   }
   else {
      save->out_of_memory = GL_TRUE;
   }

   if (save->out_of_memory) {
      _mesa_error(ctx, GL_OUT_OF_MEMORY, "internal VBO allocation");
      _mesa_install_save_vtxfmt(ctx, &save->vtxfmt_noop);
   }

   vertex_store->buffer = NULL;
   vertex_store->used = 0;
   vertex_store->refcount = 1;

   return vertex_store;
}


static void
free_vertex_store(struct gl_context *ctx,
                  struct vbo_save_vertex_store *vertex_store)
{
   assert(!vertex_store->buffer);

   if (vertex_store->bufferobj) {
      _mesa_reference_buffer_object(ctx, &vertex_store->bufferobj, NULL);
   }

   free(vertex_store);
}


GLfloat *
vbo_save_map_vertex_store(struct gl_context *ctx,
                          struct vbo_save_vertex_store *vertex_store)
{
   const GLbitfield access = (GL_MAP_WRITE_BIT |
                              GL_MAP_INVALIDATE_RANGE_BIT |
                              GL_MAP_UNSYNCHRONIZED_BIT |
                              GL_MAP_FLUSH_EXPLICIT_BIT);

   assert(vertex_store->bufferobj);
   assert(!vertex_store->buffer);  /* the buffer should not be mapped */

   if (vertex_store->bufferobj->Size > 0) {
      /* Map the remaining free space in the VBO */
      GLintptr offset = vertex_store->used * sizeof(GLfloat);
      GLsizeiptr size = vertex_store->bufferobj->Size - offset;
      GLfloat *range = (GLfloat *)
         ctx->Driver.MapBufferRange(ctx, offset, size, access,
                                    vertex_store->bufferobj);
      if (range) {
         /* compute address of start of whole buffer (needed elsewhere) */
         vertex_store->buffer = range - vertex_store->used;
         assert(vertex_store->buffer);
         return range;
      }
      else {
         vertex_store->buffer = NULL;
         return NULL;
      }
   }
   else {
      /* probably ran out of memory for buffers */
      return NULL;
   }
}


void
vbo_save_unmap_vertex_store(struct gl_context *ctx,
                            struct vbo_save_vertex_store *vertex_store)
{
   if (vertex_store->bufferobj->Size > 0) {
      GLintptr offset = 0;
      GLsizeiptr length = vertex_store->used * sizeof(GLfloat)
         - vertex_store->bufferobj->Offset;

      /* Explicitly flush the region we wrote to */
      ctx->Driver.FlushMappedBufferRange(ctx, offset, length,
                                         vertex_store->bufferobj);

      ctx->Driver.UnmapBuffer(ctx, vertex_store->bufferobj);
   }
   vertex_store->buffer = NULL;
}


static struct vbo_save_primitive_store *
alloc_prim_store(struct gl_context *ctx)
{
   struct vbo_save_primitive_store *store =
      CALLOC_STRUCT(vbo_save_primitive_store);
   (void) ctx;
   store->used = 0;
   store->refcount = 1;
   return store;
}


static void
_save_reset_counters(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   save->prim = save->prim_store->buffer + save->prim_store->used;
   save->buffer = save->vertex_store->buffer + save->vertex_store->used;

   assert(save->buffer == save->buffer_ptr);

   if (save->vertex_size)
      save->max_vert = (VBO_SAVE_BUFFER_SIZE - save->vertex_store->used) /
                        save->vertex_size;
   else
      save->max_vert = 0;

   save->vert_count = 0;
   save->prim_count = 0;
   save->prim_max = VBO_SAVE_PRIM_SIZE - save->prim_store->used;
   save->dangling_attr_ref = GL_FALSE;
}

/**
 * For a list of prims, try merging prims that can just be extensions of the
 * previous prim.
 */
static void
merge_prims(struct gl_context *ctx,
            struct _mesa_prim *prim_list,
            GLuint *prim_count)
{
   GLuint i;
   struct _mesa_prim *prev_prim = prim_list;

   for (i = 1; i < *prim_count; i++) {
      struct _mesa_prim *this_prim = prim_list + i;

      vbo_try_prim_conversion(this_prim);

      if (vbo_can_merge_prims(prev_prim, this_prim)) {
         /* We've found a prim that just extend the previous one.  Tack it
          * onto the previous one, and let this primitive struct get dropped.
          */
         vbo_merge_prims(prev_prim, this_prim);
         continue;
      }

      /* If any previous primitives have been dropped, then we need to copy
       * this later one into the next available slot.
       */
      prev_prim++;
      if (prev_prim != this_prim)
         *prev_prim = *this_prim;
   }

   *prim_count = prev_prim - prim_list + 1;
}

/**
 * Insert the active immediate struct onto the display list currently
 * being built.
 */
static void
_save_compile_vertex_list(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   struct vbo_save_vertex_list *node;

   /* Allocate space for this structure in the display list currently
    * being compiled.
    */
   node = (struct vbo_save_vertex_list *)
      _mesa_dlist_alloc(ctx, save->opcode_vertex_list, sizeof(*node));

   if (!node)
      return;

   /* Duplicate our template, increment refcounts to the storage structs:
    */
   memcpy(node->attrsz, save->attrsz, sizeof(node->attrsz));
   memcpy(node->attrtype, save->attrtype, sizeof(node->attrtype));
   node->vertex_size = save->vertex_size;
   node->buffer_offset =
      (save->buffer - save->vertex_store->buffer) * sizeof(GLfloat);
   node->count = save->vert_count;
   node->wrap_count = save->copied.nr;
   node->dangling_attr_ref = save->dangling_attr_ref;
   node->prim = save->prim;
   node->prim_count = save->prim_count;
   node->vertex_store = save->vertex_store;
   node->prim_store = save->prim_store;

   node->vertex_store->refcount++;
   node->prim_store->refcount++;

   if (node->prim[0].no_current_update) {
      node->current_size = 0;
      node->current_data = NULL;
   }
   else {
      node->current_size = node->vertex_size - node->attrsz[0];
      node->current_data = NULL;

      if (node->current_size) {
         /* If the malloc fails, we just pull the data out of the VBO
          * later instead.
          */
         node->current_data = malloc(node->current_size * sizeof(GLfloat));
         if (node->current_data) {
            const char *buffer = (const char *) save->vertex_store->buffer;
            unsigned attr_offset = node->attrsz[0] * sizeof(GLfloat);
            unsigned vertex_offset = 0;

            if (node->count)
               vertex_offset =
                  (node->count - 1) * node->vertex_size * sizeof(GLfloat);

            memcpy(node->current_data,
                   buffer + node->buffer_offset + vertex_offset + attr_offset,
                   node->current_size * sizeof(GLfloat));
         }
      }
   }

   assert(node->attrsz[VBO_ATTRIB_POS] != 0 || node->count == 0);

   if (save->dangling_attr_ref)
      ctx->ListState.CurrentList->Flags |= DLIST_DANGLING_REFS;

   save->vertex_store->used += save->vertex_size * node->count;
   save->prim_store->used += node->prim_count;

   /* Copy duplicated vertices
    */
   save->copied.nr = _save_copy_vertices(ctx, node, save->buffer);

   merge_prims(ctx, node->prim, &node->prim_count);

   /* Deal with GL_COMPILE_AND_EXECUTE:
    */
   if (ctx->ExecuteFlag) {
      struct _glapi_table *dispatch = GET_DISPATCH();

      _glapi_set_dispatch(ctx->Exec);

      vbo_loopback_vertex_list(ctx,
                               (const GLfloat *) ((const char *) save->
                                                  vertex_store->buffer +
                                                  node->buffer_offset),
                               node->attrsz, node->prim, node->prim_count,
                               node->wrap_count, node->vertex_size);

      _glapi_set_dispatch(dispatch);
   }

   /* Decide whether the storage structs are full, or can be used for
    * the next vertex lists as well.
    */
   if (save->vertex_store->used >
       VBO_SAVE_BUFFER_SIZE - 16 * (save->vertex_size + 4)) {

      /* Unmap old store:
       */
      vbo_save_unmap_vertex_store(ctx, save->vertex_store);

      /* Release old reference:
       */
      save->vertex_store->refcount--;
      assert(save->vertex_store->refcount != 0);
      save->vertex_store = NULL;

      /* Allocate and map new store:
       */
      save->vertex_store = alloc_vertex_store(ctx);
      save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
      save->out_of_memory = save->buffer_ptr == NULL;
   }

   if (save->prim_store->used > VBO_SAVE_PRIM_SIZE - 6) {
      save->prim_store->refcount--;
      assert(save->prim_store->refcount != 0);
      save->prim_store = alloc_prim_store(ctx);
   }

   /* Reset our structures for the next run of vertices:
    */
   _save_reset_counters(ctx);
}


/**
 * This is called when we fill a vertex buffer before we hit a glEnd().
 * We
 * TODO -- If no new vertices have been stored, don't bother saving it.
 */
static void
_save_wrap_buffers(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLint i = save->prim_count - 1;
   GLenum mode;
   GLboolean weak;
   GLboolean no_current_update;

   assert(i < (GLint) save->prim_max);
   assert(i >= 0);

   /* Close off in-progress primitive.
    */
   save->prim[i].count = (save->vert_count - save->prim[i].start);
   mode = save->prim[i].mode;
   weak = save->prim[i].weak;
   no_current_update = save->prim[i].no_current_update;

   /* store the copied vertices, and allocate a new list.
    */
   _save_compile_vertex_list(ctx);

   /* Restart interrupted primitive
    */
   save->prim[0].mode = mode;
   save->prim[0].weak = weak;
   save->prim[0].no_current_update = no_current_update;
   save->prim[0].begin = 0;
   save->prim[0].end = 0;
   save->prim[0].pad = 0;
   save->prim[0].start = 0;
   save->prim[0].count = 0;
   save->prim[0].num_instances = 1;
   save->prim[0].base_instance = 0;
   save->prim_count = 1;
}


/**
 * Called only when buffers are wrapped as the result of filling the
 * vertex_store struct.
 */
static void
_save_wrap_filled_vertex(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLfloat *data = save->copied.buffer;
   GLuint i;

   /* Emit a glEnd to close off the last vertex list.
    */
   _save_wrap_buffers(ctx);

   /* Copy stored stored vertices to start of new list.
    */
   assert(save->max_vert - save->vert_count > save->copied.nr);

   for (i = 0; i < save->copied.nr; i++) {
      memcpy(save->buffer_ptr, data, save->vertex_size * sizeof(GLfloat));
      data += save->vertex_size;
      save->buffer_ptr += save->vertex_size;
      save->vert_count++;
   }
}


static void
_save_copy_to_current(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLuint i;

   for (i = VBO_ATTRIB_POS + 1; i < VBO_ATTRIB_MAX; i++) {
      if (save->attrsz[i]) {
         save->currentsz[i][0] = save->attrsz[i];
         COPY_CLEAN_4V_TYPE_AS_FLOAT(save->current[i], save->attrsz[i],
                                     save->attrptr[i], save->attrtype[i]);
      }
   }
}


static void
_save_copy_from_current(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLint i;

   for (i = VBO_ATTRIB_POS + 1; i < VBO_ATTRIB_MAX; i++) {
      switch (save->attrsz[i]) {
      case 4:
         save->attrptr[i][3] = save->current[i][3];
      case 3:
         save->attrptr[i][2] = save->current[i][2];
      case 2:
         save->attrptr[i][1] = save->current[i][1];
      case 1:
         save->attrptr[i][0] = save->current[i][0];
      case 0:
         break;
      }
   }
}


/**
 * Called when we increase the size of a vertex attribute.  For example,
 * if we've seen one or more glTexCoord2f() calls and now we get a
 * glTexCoord3f() call.
 * Flush existing data, set new attrib size, replay copied vertices.
 */
static void
_save_upgrade_vertex(struct gl_context *ctx, GLuint attr, GLuint newsz)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLuint oldsz;
   GLuint i;
   GLfloat *tmp;

   /* Store the current run of vertices, and emit a GL_END.  Emit a
    * BEGIN in the new buffer.
    */
   if (save->vert_count)
      _save_wrap_buffers(ctx);
   else
      assert(save->copied.nr == 0);

   /* Do a COPY_TO_CURRENT to ensure back-copying works for the case
    * when the attribute already exists in the vertex and is having
    * its size increased.
    */
   _save_copy_to_current(ctx);

   /* Fix up sizes:
    */
   oldsz = save->attrsz[attr];
   save->attrsz[attr] = newsz;

   save->vertex_size += newsz - oldsz;
   save->max_vert = ((VBO_SAVE_BUFFER_SIZE - save->vertex_store->used) /
                     save->vertex_size);
   save->vert_count = 0;

   /* Recalculate all the attrptr[] values:
    */
   for (i = 0, tmp = save->vertex; i < VBO_ATTRIB_MAX; i++) {
      if (save->attrsz[i]) {
         save->attrptr[i] = tmp;
         tmp += save->attrsz[i];
      }
      else {
         save->attrptr[i] = NULL;       /* will not be dereferenced. */
      }
   }

   /* Copy from current to repopulate the vertex with correct values.
    */
   _save_copy_from_current(ctx);

   /* Replay stored vertices to translate them to new format here.
    *
    * If there are copied vertices and the new (upgraded) attribute
    * has not been defined before, this list is somewhat degenerate,
    * and will need fixup at runtime.
    */
   if (save->copied.nr) {
      const GLfloat *data = save->copied.buffer;
      GLfloat *dest = save->buffer;
      GLuint j;

      /* Need to note this and fix up at runtime (or loopback):
       */
      if (attr != VBO_ATTRIB_POS && save->currentsz[attr][0] == 0) {
         assert(oldsz == 0);
         save->dangling_attr_ref = GL_TRUE;
      }

      for (i = 0; i < save->copied.nr; i++) {
         for (j = 0; j < VBO_ATTRIB_MAX; j++) {
            if (save->attrsz[j]) {
               if (j == attr) {
                  if (oldsz) {
                     COPY_CLEAN_4V_TYPE_AS_FLOAT(dest, oldsz, data,
                                                 save->attrtype[j]);
                     data += oldsz;
                     dest += newsz;
                  }
                  else {
                     COPY_SZ_4V(dest, newsz, save->current[attr]);
                     dest += newsz;
                  }
               }
               else {
                  GLint sz = save->attrsz[j];
                  COPY_SZ_4V(dest, sz, data);
                  data += sz;
                  dest += sz;
               }
            }
         }
      }

      save->buffer_ptr = dest;
      save->vert_count += save->copied.nr;
   }
}


/**
 * This is called when the size of a vertex attribute changes.
 * For example, after seeing one or more glTexCoord2f() calls we
 * get a glTexCoord4f() or glTexCoord1f() call.
 */
static void
save_fixup_vertex(struct gl_context *ctx, GLuint attr, GLuint sz)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   if (sz > save->attrsz[attr]) {
      /* New size is larger.  Need to flush existing vertices and get
       * an enlarged vertex format.
       */
      _save_upgrade_vertex(ctx, attr, sz);
   }
   else if (sz < save->active_sz[attr]) {
      GLuint i;
      const GLfloat *id = vbo_get_default_vals_as_float(save->attrtype[attr]);

      /* New size is equal or smaller - just need to fill in some
       * zeros.
       */
      for (i = sz; i <= save->attrsz[attr]; i++)
         save->attrptr[attr][i - 1] = id[i - 1];
   }

   save->active_sz[attr] = sz;
}


/**
 * Reset the current size of all vertex attributes to the default
 * value of 0.  This signals that we haven't yet seen any per-vertex
 * commands such as glNormal3f() or glTexCoord2f().
 */
static void
_save_reset_vertex(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLuint i;

   for (i = 0; i < VBO_ATTRIB_MAX; i++) {
      save->attrsz[i] = 0;
      save->active_sz[i] = 0;
   }

   save->vertex_size = 0;
}



#define ERROR(err)   _mesa_compile_error(ctx, err, __FUNCTION__);


/* Only one size for each attribute may be active at once.  Eg. if
 * Color3f is installed/active, then Color4f may not be, even if the
 * vertex actually contains 4 color coordinates.  This is because the
 * 3f version won't otherwise set color[3] to 1.0 -- this is the job
 * of the chooser function when switching between Color4f and Color3f.
 */
#define ATTR(A, N, T, V0, V1, V2, V3)                           \
do {                                                            \
   struct vbo_save_context *save = &vbo_context(ctx)->save;     \
                                                                \
   if (save->active_sz[A] != N)                                 \
      save_fixup_vertex(ctx, A, N);                             \
                                                                \
   {                                                            \
      GLfloat *dest = save->attrptr[A];                         \
      if (N>0) dest[0] = V0;                                    \
      if (N>1) dest[1] = V1;                                    \
      if (N>2) dest[2] = V2;                                    \
      if (N>3) dest[3] = V3;                                    \
      save->attrtype[A] = T;                                    \
   }                                                            \
                                                                \
   if ((A) == 0) {                                              \
      GLuint i;                                                 \
                                                                \
      for (i = 0; i < save->vertex_size; i++)                   \
         save->buffer_ptr[i] = save->vertex[i];                 \
                                                                \
      save->buffer_ptr += save->vertex_size;                    \
                                                                \
      if (++save->vert_count >= save->max_vert)                 \
         _save_wrap_filled_vertex(ctx);                         \
   }                                                            \
} while (0)

#define TAG(x) _save_##x

#include "vbo_attrib_tmp.h"



#define MAT( ATTR, N, face, params )                    \
do {                                                    \
   if (face != GL_BACK)                                 \
      MAT_ATTR( ATTR, N, params ); /* front */          \
   if (face != GL_FRONT)                                \
      MAT_ATTR( ATTR + 1, N, params ); /* back */       \
} while (0)


/**
 * Save a glMaterial call found between glBegin/End.
 * glMaterial calls outside Begin/End are handled in dlist.c.
 */
static void GLAPIENTRY
_save_Materialfv(GLenum face, GLenum pname, const GLfloat *params)
{
   GET_CURRENT_CONTEXT(ctx);

   if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
      _mesa_compile_error(ctx, GL_INVALID_ENUM, "glMaterial(face)");
      return;
   }

   switch (pname) {
   case GL_EMISSION:
      MAT(VBO_ATTRIB_MAT_FRONT_EMISSION, 4, face, params);
      break;
   case GL_AMBIENT:
      MAT(VBO_ATTRIB_MAT_FRONT_AMBIENT, 4, face, params);
      break;
   case GL_DIFFUSE:
      MAT(VBO_ATTRIB_MAT_FRONT_DIFFUSE, 4, face, params);
      break;
   case GL_SPECULAR:
      MAT(VBO_ATTRIB_MAT_FRONT_SPECULAR, 4, face, params);
      break;
   case GL_SHININESS:
      if (*params < 0 || *params > ctx->Const.MaxShininess) {
         _mesa_compile_error(ctx, GL_INVALID_VALUE, "glMaterial(shininess)");
      }
      else {
         MAT(VBO_ATTRIB_MAT_FRONT_SHININESS, 1, face, params);
      }
      break;
   case GL_COLOR_INDEXES:
      MAT(VBO_ATTRIB_MAT_FRONT_INDEXES, 3, face, params);
      break;
   case GL_AMBIENT_AND_DIFFUSE:
      MAT(VBO_ATTRIB_MAT_FRONT_AMBIENT, 4, face, params);
      MAT(VBO_ATTRIB_MAT_FRONT_DIFFUSE, 4, face, params);
      break;
   default:
      _mesa_compile_error(ctx, GL_INVALID_ENUM, "glMaterial(pname)");
      return;
   }
}


/* Cope with EvalCoord/CallList called within a begin/end object:
 *     -- Flush current buffer
 *     -- Fallback to opcodes for the rest of the begin/end object.
 */
static void
dlist_fallback(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   if (save->vert_count || save->prim_count) {
      if (save->prim_count > 0) {
         /* Close off in-progress primitive. */
         GLint i = save->prim_count - 1;
         save->prim[i].count = save->vert_count - save->prim[i].start;
      }

      /* Need to replay this display list with loopback,
       * unfortunately, otherwise this primitive won't be handled
       * properly:
       */
      save->dangling_attr_ref = GL_TRUE;

      _save_compile_vertex_list(ctx);
   }

   _save_copy_to_current(ctx);
   _save_reset_vertex(ctx);
   _save_reset_counters(ctx);
   if (save->out_of_memory) {
      _mesa_install_save_vtxfmt(ctx, &save->vtxfmt_noop);
   }
   else {
      _mesa_install_save_vtxfmt(ctx, &ctx->ListState.ListVtxfmt);
   }
   ctx->Driver.SaveNeedFlush = GL_FALSE;
}


static void GLAPIENTRY
_save_EvalCoord1f(GLfloat u)
{
   GET_CURRENT_CONTEXT(ctx);
   dlist_fallback(ctx);
   CALL_EvalCoord1f(ctx->Save, (u));
}

static void GLAPIENTRY
_save_EvalCoord1fv(const GLfloat * v)
{
   GET_CURRENT_CONTEXT(ctx);
   dlist_fallback(ctx);
   CALL_EvalCoord1fv(ctx->Save, (v));
}

static void GLAPIENTRY
_save_EvalCoord2f(GLfloat u, GLfloat v)
{
   GET_CURRENT_CONTEXT(ctx);
   dlist_fallback(ctx);
   CALL_EvalCoord2f(ctx->Save, (u, v));
}

static void GLAPIENTRY
_save_EvalCoord2fv(const GLfloat * v)
{
   GET_CURRENT_CONTEXT(ctx);
   dlist_fallback(ctx);
   CALL_EvalCoord2fv(ctx->Save, (v));
}

static void GLAPIENTRY
_save_EvalPoint1(GLint i)
{
   GET_CURRENT_CONTEXT(ctx);
   dlist_fallback(ctx);
   CALL_EvalPoint1(ctx->Save, (i));
}

static void GLAPIENTRY
_save_EvalPoint2(GLint i, GLint j)
{
   GET_CURRENT_CONTEXT(ctx);
   dlist_fallback(ctx);
   CALL_EvalPoint2(ctx->Save, (i, j));
}

static void GLAPIENTRY
_save_CallList(GLuint l)
{
   GET_CURRENT_CONTEXT(ctx);
   dlist_fallback(ctx);
   CALL_CallList(ctx->Save, (l));
}

static void GLAPIENTRY
_save_CallLists(GLsizei n, GLenum type, const GLvoid * v)
{
   GET_CURRENT_CONTEXT(ctx);
   dlist_fallback(ctx);
   CALL_CallLists(ctx->Save, (n, type, v));
}



/**
 * Called via ctx->Driver.NotifySaveBegin() when a glBegin is getting
 * compiled into a display list.
 * Updating of ctx->Driver.CurrentSavePrimitive is already taken care of.
 */
GLboolean
vbo_save_NotifyBegin(struct gl_context *ctx, GLenum mode)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   const GLuint i = save->prim_count++;

   assert(i < save->prim_max);
   save->prim[i].mode = mode & VBO_SAVE_PRIM_MODE_MASK;
   save->prim[i].begin = 1;
   save->prim[i].end = 0;
   save->prim[i].weak = (mode & VBO_SAVE_PRIM_WEAK) ? 1 : 0;
   save->prim[i].no_current_update =
      (mode & VBO_SAVE_PRIM_NO_CURRENT_UPDATE) ? 1 : 0;
   save->prim[i].pad = 0;
   save->prim[i].start = save->vert_count;
   save->prim[i].count = 0;
   save->prim[i].num_instances = 1;
   save->prim[i].base_instance = 0;

   if (save->out_of_memory) {
      _mesa_install_save_vtxfmt(ctx, &save->vtxfmt_noop);
   }
   else {
      _mesa_install_save_vtxfmt(ctx, &save->vtxfmt);
   }

   /* We need to call SaveFlushVertices() if there's state change */
   ctx->Driver.SaveNeedFlush = GL_TRUE;

   /* GL_TRUE means we've handled this glBegin here; don't compile a BEGIN
    * opcode into the display list.
    */
   return GL_TRUE;
}


static void GLAPIENTRY
_save_End(void)
{
   GET_CURRENT_CONTEXT(ctx);
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   const GLint i = save->prim_count - 1;

   ctx->Driver.CurrentSavePrimitive = PRIM_OUTSIDE_BEGIN_END;
   save->prim[i].end = 1;
   save->prim[i].count = (save->vert_count - save->prim[i].start);

   if (i == (GLint) save->prim_max - 1) {
      _save_compile_vertex_list(ctx);
      assert(save->copied.nr == 0);
   }

   /* Swap out this vertex format while outside begin/end.  Any color,
    * etc. received between here and the next begin will be compiled
    * as opcodes.
    */
   if (save->out_of_memory) {
      _mesa_install_save_vtxfmt(ctx, &save->vtxfmt_noop);
   }
   else {
      _mesa_install_save_vtxfmt(ctx, &ctx->ListState.ListVtxfmt);
   }
}


static void GLAPIENTRY
_save_Begin(GLenum mode)
{
   GET_CURRENT_CONTEXT(ctx);
   (void) mode;
   _mesa_compile_error(ctx, GL_INVALID_OPERATION, "Recursive glBegin");
}


static void GLAPIENTRY
_save_PrimitiveRestartNV(void)
{
   GLenum curPrim;
   GET_CURRENT_CONTEXT(ctx);

   curPrim = ctx->Driver.CurrentSavePrimitive;

   _save_End();
   _save_Begin(curPrim);
}


/* Unlike the functions above, these are to be hooked into the vtxfmt
 * maintained in ctx->ListState, active when the list is known or
 * suspected to be outside any begin/end primitive.
 * Note: OBE = Outside Begin/End
 */
static void GLAPIENTRY
_save_OBE_Rectf(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2)
{
   GET_CURRENT_CONTEXT(ctx);
   vbo_save_NotifyBegin(ctx, GL_QUADS | VBO_SAVE_PRIM_WEAK);
   CALL_Vertex2f(GET_DISPATCH(), (x1, y1));
   CALL_Vertex2f(GET_DISPATCH(), (x2, y1));
   CALL_Vertex2f(GET_DISPATCH(), (x2, y2));
   CALL_Vertex2f(GET_DISPATCH(), (x1, y2));
   CALL_End(GET_DISPATCH(), ());
}


static void GLAPIENTRY
_save_OBE_DrawArrays(GLenum mode, GLint start, GLsizei count)
{
   GET_CURRENT_CONTEXT(ctx);
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLint i;

   if (!_mesa_is_valid_prim_mode(ctx, mode)) {
      _mesa_compile_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)");
      return;
   }
   if (count < 0) {
      _mesa_compile_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count<0)");
      return;
   }

   if (save->out_of_memory)
      return;

   _ae_map_vbos(ctx);

   vbo_save_NotifyBegin(ctx, (mode | VBO_SAVE_PRIM_WEAK
                              | VBO_SAVE_PRIM_NO_CURRENT_UPDATE));

   for (i = 0; i < count; i++)
      CALL_ArrayElement(GET_DISPATCH(), (start + i));
   CALL_End(GET_DISPATCH(), ());

   _ae_unmap_vbos(ctx);
}


/* Could do better by copying the arrays and element list intact and
 * then emitting an indexed prim at runtime.
 */
static void GLAPIENTRY
_save_OBE_DrawElements(GLenum mode, GLsizei count, GLenum type,
                       const GLvoid * indices)
{
   GET_CURRENT_CONTEXT(ctx);
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLint i;

   if (!_mesa_is_valid_prim_mode(ctx, mode)) {
      _mesa_compile_error(ctx, GL_INVALID_ENUM, "glDrawElements(mode)");
      return;
   }
   if (count < 0) {
      _mesa_compile_error(ctx, GL_INVALID_VALUE, "glDrawElements(count<0)");
      return;
   }
   if (type != GL_UNSIGNED_BYTE &&
       type != GL_UNSIGNED_SHORT &&
       type != GL_UNSIGNED_INT) {
      _mesa_compile_error(ctx, GL_INVALID_VALUE, "glDrawElements(count<0)");
      return;
   }

   if (save->out_of_memory)
      return;

   _ae_map_vbos(ctx);

   if (_mesa_is_bufferobj(ctx->Array.ArrayObj->ElementArrayBufferObj))
      indices =
         ADD_POINTERS(ctx->Array.ArrayObj->ElementArrayBufferObj->Pointer, indices);

   vbo_save_NotifyBegin(ctx, (mode | VBO_SAVE_PRIM_WEAK |
                              VBO_SAVE_PRIM_NO_CURRENT_UPDATE));

   switch (type) {
   case GL_UNSIGNED_BYTE:
      for (i = 0; i < count; i++)
         CALL_ArrayElement(GET_DISPATCH(), (((GLubyte *) indices)[i]));
      break;
   case GL_UNSIGNED_SHORT:
      for (i = 0; i < count; i++)
         CALL_ArrayElement(GET_DISPATCH(), (((GLushort *) indices)[i]));
      break;
   case GL_UNSIGNED_INT:
      for (i = 0; i < count; i++)
         CALL_ArrayElement(GET_DISPATCH(), (((GLuint *) indices)[i]));
      break;
   default:
      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)");
      break;
   }

   CALL_End(GET_DISPATCH(), ());

   _ae_unmap_vbos(ctx);
}


static void GLAPIENTRY
_save_OBE_DrawRangeElements(GLenum mode, GLuint start, GLuint end,
                            GLsizei count, GLenum type,
                            const GLvoid * indices)
{
   GET_CURRENT_CONTEXT(ctx);
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   if (!_mesa_is_valid_prim_mode(ctx, mode)) {
      _mesa_compile_error(ctx, GL_INVALID_ENUM, "glDrawRangeElements(mode)");
      return;
   }
   if (count < 0) {
      _mesa_compile_error(ctx, GL_INVALID_VALUE,
                          "glDrawRangeElements(count<0)");
      return;
   }
   if (type != GL_UNSIGNED_BYTE &&
       type != GL_UNSIGNED_SHORT &&
       type != GL_UNSIGNED_INT) {
      _mesa_compile_error(ctx, GL_INVALID_ENUM, "glDrawRangeElements(type)");
      return;
   }
   if (end < start) {
      _mesa_compile_error(ctx, GL_INVALID_VALUE,
                          "glDrawRangeElements(end < start)");
      return;
   }

   if (save->out_of_memory)
      return;

   _save_OBE_DrawElements(mode, count, type, indices);
}


static void GLAPIENTRY
_save_OBE_MultiDrawElements(GLenum mode, const GLsizei *count, GLenum type,
                            const GLvoid * const *indices, GLsizei primcount)
{
   GLsizei i;

   for (i = 0; i < primcount; i++) {
      if (count[i] > 0) {
         CALL_DrawElements(GET_DISPATCH(), (mode, count[i], type, indices[i]));
      }
   }
}


static void GLAPIENTRY
_save_OBE_MultiDrawElementsBaseVertex(GLenum mode, const GLsizei *count,
                                      GLenum type,
                                      const GLvoid * const *indices,
                                      GLsizei primcount,
                                      const GLint *basevertex)
{
   GLsizei i;

   for (i = 0; i < primcount; i++) {
      if (count[i] > 0) {
         CALL_DrawElementsBaseVertex(GET_DISPATCH(), (mode, count[i], type,
                                                      indices[i],
                                                      basevertex[i]));
      }
   }
}


static void
_save_vtxfmt_init(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLvertexformat *vfmt = &save->vtxfmt;

   vfmt->ArrayElement = _ae_ArrayElement;

   vfmt->Color3f = _save_Color3f;
   vfmt->Color3fv = _save_Color3fv;
   vfmt->Color4f = _save_Color4f;
   vfmt->Color4fv = _save_Color4fv;
   vfmt->EdgeFlag = _save_EdgeFlag;
   vfmt->End = _save_End;
   vfmt->PrimitiveRestartNV = _save_PrimitiveRestartNV;
   vfmt->FogCoordfEXT = _save_FogCoordfEXT;
   vfmt->FogCoordfvEXT = _save_FogCoordfvEXT;
   vfmt->Indexf = _save_Indexf;
   vfmt->Indexfv = _save_Indexfv;
   vfmt->Materialfv = _save_Materialfv;
   vfmt->MultiTexCoord1fARB = _save_MultiTexCoord1f;
   vfmt->MultiTexCoord1fvARB = _save_MultiTexCoord1fv;
   vfmt->MultiTexCoord2fARB = _save_MultiTexCoord2f;
   vfmt->MultiTexCoord2fvARB = _save_MultiTexCoord2fv;
   vfmt->MultiTexCoord3fARB = _save_MultiTexCoord3f;
   vfmt->MultiTexCoord3fvARB = _save_MultiTexCoord3fv;
   vfmt->MultiTexCoord4fARB = _save_MultiTexCoord4f;
   vfmt->MultiTexCoord4fvARB = _save_MultiTexCoord4fv;
   vfmt->Normal3f = _save_Normal3f;
   vfmt->Normal3fv = _save_Normal3fv;
   vfmt->SecondaryColor3fEXT = _save_SecondaryColor3fEXT;
   vfmt->SecondaryColor3fvEXT = _save_SecondaryColor3fvEXT;
   vfmt->TexCoord1f = _save_TexCoord1f;
   vfmt->TexCoord1fv = _save_TexCoord1fv;
   vfmt->TexCoord2f = _save_TexCoord2f;
   vfmt->TexCoord2fv = _save_TexCoord2fv;
   vfmt->TexCoord3f = _save_TexCoord3f;
   vfmt->TexCoord3fv = _save_TexCoord3fv;
   vfmt->TexCoord4f = _save_TexCoord4f;
   vfmt->TexCoord4fv = _save_TexCoord4fv;
   vfmt->Vertex2f = _save_Vertex2f;
   vfmt->Vertex2fv = _save_Vertex2fv;
   vfmt->Vertex3f = _save_Vertex3f;
   vfmt->Vertex3fv = _save_Vertex3fv;
   vfmt->Vertex4f = _save_Vertex4f;
   vfmt->Vertex4fv = _save_Vertex4fv;
   vfmt->VertexAttrib1fARB = _save_VertexAttrib1fARB;
   vfmt->VertexAttrib1fvARB = _save_VertexAttrib1fvARB;
   vfmt->VertexAttrib2fARB = _save_VertexAttrib2fARB;
   vfmt->VertexAttrib2fvARB = _save_VertexAttrib2fvARB;
   vfmt->VertexAttrib3fARB = _save_VertexAttrib3fARB;
   vfmt->VertexAttrib3fvARB = _save_VertexAttrib3fvARB;
   vfmt->VertexAttrib4fARB = _save_VertexAttrib4fARB;
   vfmt->VertexAttrib4fvARB = _save_VertexAttrib4fvARB;

   vfmt->VertexAttrib1fNV = _save_VertexAttrib1fNV;
   vfmt->VertexAttrib1fvNV = _save_VertexAttrib1fvNV;
   vfmt->VertexAttrib2fNV = _save_VertexAttrib2fNV;
   vfmt->VertexAttrib2fvNV = _save_VertexAttrib2fvNV;
   vfmt->VertexAttrib3fNV = _save_VertexAttrib3fNV;
   vfmt->VertexAttrib3fvNV = _save_VertexAttrib3fvNV;
   vfmt->VertexAttrib4fNV = _save_VertexAttrib4fNV;
   vfmt->VertexAttrib4fvNV = _save_VertexAttrib4fvNV;

   /* integer-valued */
   vfmt->VertexAttribI1i = _save_VertexAttribI1i;
   vfmt->VertexAttribI2i = _save_VertexAttribI2i;
   vfmt->VertexAttribI3i = _save_VertexAttribI3i;
   vfmt->VertexAttribI4i = _save_VertexAttribI4i;
   vfmt->VertexAttribI2iv = _save_VertexAttribI2iv;
   vfmt->VertexAttribI3iv = _save_VertexAttribI3iv;
   vfmt->VertexAttribI4iv = _save_VertexAttribI4iv;

   /* unsigned integer-valued */
   vfmt->VertexAttribI1ui = _save_VertexAttribI1ui;
   vfmt->VertexAttribI2ui = _save_VertexAttribI2ui;
   vfmt->VertexAttribI3ui = _save_VertexAttribI3ui;
   vfmt->VertexAttribI4ui = _save_VertexAttribI4ui;
   vfmt->VertexAttribI2uiv = _save_VertexAttribI2uiv;
   vfmt->VertexAttribI3uiv = _save_VertexAttribI3uiv;
   vfmt->VertexAttribI4uiv = _save_VertexAttribI4uiv;

   vfmt->VertexP2ui = _save_VertexP2ui;
   vfmt->VertexP3ui = _save_VertexP3ui;
   vfmt->VertexP4ui = _save_VertexP4ui;
   vfmt->VertexP2uiv = _save_VertexP2uiv;
   vfmt->VertexP3uiv = _save_VertexP3uiv;
   vfmt->VertexP4uiv = _save_VertexP4uiv;

   vfmt->TexCoordP1ui = _save_TexCoordP1ui;
   vfmt->TexCoordP2ui = _save_TexCoordP2ui;
   vfmt->TexCoordP3ui = _save_TexCoordP3ui;
   vfmt->TexCoordP4ui = _save_TexCoordP4ui;
   vfmt->TexCoordP1uiv = _save_TexCoordP1uiv;
   vfmt->TexCoordP2uiv = _save_TexCoordP2uiv;
   vfmt->TexCoordP3uiv = _save_TexCoordP3uiv;
   vfmt->TexCoordP4uiv = _save_TexCoordP4uiv;

   vfmt->MultiTexCoordP1ui = _save_MultiTexCoordP1ui;
   vfmt->MultiTexCoordP2ui = _save_MultiTexCoordP2ui;
   vfmt->MultiTexCoordP3ui = _save_MultiTexCoordP3ui;
   vfmt->MultiTexCoordP4ui = _save_MultiTexCoordP4ui;
   vfmt->MultiTexCoordP1uiv = _save_MultiTexCoordP1uiv;
   vfmt->MultiTexCoordP2uiv = _save_MultiTexCoordP2uiv;
   vfmt->MultiTexCoordP3uiv = _save_MultiTexCoordP3uiv;
   vfmt->MultiTexCoordP4uiv = _save_MultiTexCoordP4uiv;

   vfmt->NormalP3ui = _save_NormalP3ui;
   vfmt->NormalP3uiv = _save_NormalP3uiv;

   vfmt->ColorP3ui = _save_ColorP3ui;
   vfmt->ColorP4ui = _save_ColorP4ui;
   vfmt->ColorP3uiv = _save_ColorP3uiv;
   vfmt->ColorP4uiv = _save_ColorP4uiv;

   vfmt->SecondaryColorP3ui = _save_SecondaryColorP3ui;
   vfmt->SecondaryColorP3uiv = _save_SecondaryColorP3uiv;

   vfmt->VertexAttribP1ui = _save_VertexAttribP1ui;
   vfmt->VertexAttribP2ui = _save_VertexAttribP2ui;
   vfmt->VertexAttribP3ui = _save_VertexAttribP3ui;
   vfmt->VertexAttribP4ui = _save_VertexAttribP4ui;

   vfmt->VertexAttribP1uiv = _save_VertexAttribP1uiv;
   vfmt->VertexAttribP2uiv = _save_VertexAttribP2uiv;
   vfmt->VertexAttribP3uiv = _save_VertexAttribP3uiv;
   vfmt->VertexAttribP4uiv = _save_VertexAttribP4uiv;

   /* This will all require us to fallback to saving the list as opcodes:
    */
   vfmt->CallList = _save_CallList;
   vfmt->CallLists = _save_CallLists;

   vfmt->EvalCoord1f = _save_EvalCoord1f;
   vfmt->EvalCoord1fv = _save_EvalCoord1fv;
   vfmt->EvalCoord2f = _save_EvalCoord2f;
   vfmt->EvalCoord2fv = _save_EvalCoord2fv;
   vfmt->EvalPoint1 = _save_EvalPoint1;
   vfmt->EvalPoint2 = _save_EvalPoint2;

   /* These calls all generate GL_INVALID_OPERATION since this vtxfmt is
    * only used when we're inside a glBegin/End pair.
    */
   vfmt->Begin = _save_Begin;
}


/**
 * Initialize the dispatch table with the VBO functions for display
 * list compilation.
 */
void
vbo_initialize_save_dispatch(const struct gl_context *ctx,
                             struct _glapi_table *exec)
{
   SET_DrawArrays(exec, _save_OBE_DrawArrays);
   SET_DrawElements(exec, _save_OBE_DrawElements);
   SET_DrawRangeElements(exec, _save_OBE_DrawRangeElements);
   SET_MultiDrawElementsEXT(exec, _save_OBE_MultiDrawElements);
   SET_MultiDrawElementsBaseVertex(exec, _save_OBE_MultiDrawElementsBaseVertex);
   SET_Rectf(exec, _save_OBE_Rectf);
   /* Note: other glDraw functins aren't compiled into display lists */
}



void
vbo_save_SaveFlushVertices(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   /* Noop when we are actually active:
    */
   if (ctx->Driver.CurrentSavePrimitive <= PRIM_MAX)
      return;

   if (save->vert_count || save->prim_count)
      _save_compile_vertex_list(ctx);

   _save_copy_to_current(ctx);
   _save_reset_vertex(ctx);
   _save_reset_counters(ctx);
   ctx->Driver.SaveNeedFlush = GL_FALSE;
}


void
vbo_save_NewList(struct gl_context *ctx, GLuint list, GLenum mode)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   (void) list;
   (void) mode;

   if (!save->prim_store)
      save->prim_store = alloc_prim_store(ctx);

   if (!save->vertex_store)
      save->vertex_store = alloc_vertex_store(ctx);

   save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);

   _save_reset_vertex(ctx);
   _save_reset_counters(ctx);
   ctx->Driver.SaveNeedFlush = GL_FALSE;
}


void
vbo_save_EndList(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   /* EndList called inside a (saved) Begin/End pair?
    */
   if (_mesa_inside_dlist_begin_end(ctx)) {
      if (save->prim_count > 0) {
         GLint i = save->prim_count - 1;
         ctx->Driver.CurrentSavePrimitive = PRIM_OUTSIDE_BEGIN_END;
         save->prim[i].end = 0;
         save->prim[i].count = save->vert_count - save->prim[i].start;
      }

      /* Make sure this vertex list gets replayed by the "loopback"
       * mechanism:
       */
      save->dangling_attr_ref = GL_TRUE;
      vbo_save_SaveFlushVertices(ctx);

      /* Swap out this vertex format while outside begin/end.  Any color,
       * etc. received between here and the next begin will be compiled
       * as opcodes.
       */
      _mesa_install_save_vtxfmt(ctx, &ctx->ListState.ListVtxfmt);
   }

   vbo_save_unmap_vertex_store(ctx, save->vertex_store);

   assert(save->vertex_size == 0);
}


void
vbo_save_BeginCallList(struct gl_context *ctx, struct gl_display_list *dlist)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   save->replay_flags |= dlist->Flags;
}


void
vbo_save_EndCallList(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   if (ctx->ListState.CallDepth == 1) {
      /* This is correct: want to keep only the VBO_SAVE_FALLBACK
       * flag, if it is set:
       */
      save->replay_flags &= VBO_SAVE_FALLBACK;
   }
}


static void
vbo_destroy_vertex_list(struct gl_context *ctx, void *data)
{
   struct vbo_save_vertex_list *node = (struct vbo_save_vertex_list *) data;
   (void) ctx;

   if (--node->vertex_store->refcount == 0)
      free_vertex_store(ctx, node->vertex_store);

   if (--node->prim_store->refcount == 0)
      free(node->prim_store);

   free(node->current_data);
   node->current_data = NULL;
}


static void
vbo_print_vertex_list(struct gl_context *ctx, void *data)
{
   struct vbo_save_vertex_list *node = (struct vbo_save_vertex_list *) data;
   GLuint i;
   (void) ctx;

   printf("VBO-VERTEX-LIST, %u vertices %d primitives, %d vertsize\n",
          node->count, node->prim_count, node->vertex_size);

   for (i = 0; i < node->prim_count; i++) {
      struct _mesa_prim *prim = &node->prim[i];
      printf("   prim %d: %s%s %d..%d %s %s\n",
             i,
             _mesa_lookup_prim_by_nr(prim->mode),
             prim->weak ? " (weak)" : "",
             prim->start,
             prim->start + prim->count,
             (prim->begin) ? "BEGIN" : "(wrap)",
             (prim->end) ? "END" : "(wrap)");
   }
}


/**
 * Called during context creation/init.
 */
static void
_save_current_init(struct gl_context *ctx)
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLint i;

   for (i = VBO_ATTRIB_POS; i <= VBO_ATTRIB_GENERIC15; i++) {
      const GLuint j = i - VBO_ATTRIB_POS;
      ASSERT(j < VERT_ATTRIB_MAX);
      save->currentsz[i] = &ctx->ListState.ActiveAttribSize[j];
      save->current[i] = ctx->ListState.CurrentAttrib[j];
   }

   for (i = VBO_ATTRIB_FIRST_MATERIAL; i <= VBO_ATTRIB_LAST_MATERIAL; i++) {
      const GLuint j = i - VBO_ATTRIB_FIRST_MATERIAL;
      ASSERT(j < MAT_ATTRIB_MAX);
      save->currentsz[i] = &ctx->ListState.ActiveMaterialSize[j];
      save->current[i] = ctx->ListState.CurrentMaterial[j];
   }
}


/**
 * Initialize the display list compiler.  Called during context creation.
 */
void
vbo_save_api_init(struct vbo_save_context *save)
{
   struct gl_context *ctx = save->ctx;
   GLuint i;

   save->opcode_vertex_list =
      _mesa_dlist_alloc_opcode(ctx,
                               sizeof(struct vbo_save_vertex_list),
                               vbo_save_playback_vertex_list,
                               vbo_destroy_vertex_list,
                               vbo_print_vertex_list);

   ctx->Driver.NotifySaveBegin = vbo_save_NotifyBegin;

   _save_vtxfmt_init(ctx);
   _save_current_init(ctx);
   _mesa_noop_vtxfmt_init(&save->vtxfmt_noop);

   /* These will actually get set again when binding/drawing */
   for (i = 0; i < VBO_ATTRIB_MAX; i++)
      save->inputs[i] = &save->arrays[i];
}