draw: corrections to allow for different cliptest cases

[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_noop.h"
#include "main/api_validate.h"
#include "main/api_arrayelt.h"
#include "main/vtxfmt.h"
#include "main/dispatch.h"

#include "vbo_context.h"


#if FEATURE_dlist


#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( GLcontext *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( GLcontext *ctx )
{
   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);

   ctx->Driver.BufferData( ctx, 
                           GL_ARRAY_BUFFER_ARB, 
                           VBO_SAVE_BUFFER_SIZE * sizeof(GLfloat),
                           NULL,
                           GL_STATIC_DRAW_ARB,
                           vertex_store->bufferobj);

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

   return vertex_store;
}

static void free_vertex_store( GLcontext *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 );
}

static GLfloat *map_vertex_store( GLcontext *ctx, struct vbo_save_vertex_store *vertex_store )
{
   assert(vertex_store->bufferobj);
   assert(!vertex_store->buffer);
   vertex_store->buffer = (GLfloat *)ctx->Driver.MapBuffer(ctx, 
                                                           GL_ARRAY_BUFFER_ARB, /* not used */
                                                           GL_WRITE_ONLY, /* not used */
                                                           vertex_store->bufferobj); 

   assert(vertex_store->buffer);
   return vertex_store->buffer + vertex_store->used;
}

static void unmap_vertex_store( GLcontext *ctx, struct vbo_save_vertex_store *vertex_store )
{
   ctx->Driver.UnmapBuffer( ctx, GL_ARRAY_BUFFER_ARB, vertex_store->bufferobj );
   vertex_store->buffer = NULL;
}


static struct vbo_save_primitive_store *alloc_prim_store( GLcontext *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( GLcontext *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 = 0;
}


/* Insert the active immediate struct onto the display list currently
 * being built.
 */
static void _save_compile_vertex_list( GLcontext *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));
   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++;


   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 );


   /* 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:
       */
      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 = map_vertex_store( ctx, save->vertex_store );
   } 

   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 );
}


/* TODO -- If no new vertices have been stored, don't bother saving
 * it.
 */
static void _save_wrap_buffers( GLcontext *ctx )
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLint i = save->prim_count - 1;
   GLenum mode;
   GLboolean weak;

   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;
   
   /* 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].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_count = 1;
}



/* Called only when buffers are wrapped as the result of filling the
 * vertex_store struct.  
 */
static void _save_wrap_filled_vertex( GLcontext *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( GLcontext *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(save->current[i], 
                       save->attrsz[i], 
                       save->attrptr[i]);
      }
   }
}


static void _save_copy_from_current( GLcontext *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;
      }
   }
}




/* Flush existing data, set new attrib size, replay copied vertices.
 */ 
static void _save_upgrade_vertex( GLcontext *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)
   {
      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( dest, oldsz, data );
                     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;
   }
}

static void save_fixup_vertex( GLcontext *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]) {
      static GLfloat id[4] = { 0, 0, 0, 1 };
      GLuint i;

      /* 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;
}

static void _save_reset_vertex( GLcontext *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()   _mesa_compile_error( ctx, GL_INVALID_ENUM, __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, 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;                                    \
   }                                                            \
                                                                \
   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"




/* 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 DO_FALLBACK( GLcontext *ctx )
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   if (save->vert_count || save->prim_count) {
      GLint i = save->prim_count - 1;

      /* Close off in-progress primitive.
       */
      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 = 1;
      
      _save_compile_vertex_list( ctx );
   }

   _save_copy_to_current( ctx );
   _save_reset_vertex( ctx );
   _save_reset_counters( ctx );
   _mesa_install_save_vtxfmt( ctx, &ctx->ListState.ListVtxfmt );
   ctx->Driver.SaveNeedFlush = 0;
}

static void GLAPIENTRY _save_EvalCoord1f( GLfloat u )
{
   GET_CURRENT_CONTEXT(ctx);
   DO_FALLBACK(ctx);
   ctx->Save->EvalCoord1f( u );
}

static void GLAPIENTRY _save_EvalCoord1fv( const GLfloat *v )
{
   GET_CURRENT_CONTEXT(ctx);
   DO_FALLBACK(ctx);
   ctx->Save->EvalCoord1fv( v );
}

static void GLAPIENTRY _save_EvalCoord2f( GLfloat u, GLfloat v )
{
   GET_CURRENT_CONTEXT(ctx);
   DO_FALLBACK(ctx);
   ctx->Save->EvalCoord2f( u, v );
}

static void GLAPIENTRY _save_EvalCoord2fv( const GLfloat *v )
{
   GET_CURRENT_CONTEXT(ctx);
   DO_FALLBACK(ctx);
   ctx->Save->EvalCoord2fv( v );
}

static void GLAPIENTRY _save_EvalPoint1( GLint i )
{
   GET_CURRENT_CONTEXT(ctx);
   DO_FALLBACK(ctx);
   ctx->Save->EvalPoint1( i );
}

static void GLAPIENTRY _save_EvalPoint2( GLint i, GLint j )
{
   GET_CURRENT_CONTEXT(ctx);
   DO_FALLBACK(ctx);
   ctx->Save->EvalPoint2( i, j );
}

static void GLAPIENTRY _save_CallList( GLuint l )
{
   GET_CURRENT_CONTEXT(ctx);
   DO_FALLBACK(ctx);
   ctx->Save->CallList( l );
}

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




/* This begin is hooked into ...  Updating of
 * ctx->Driver.CurrentSavePrimitive is already taken care of.
 */
GLboolean vbo_save_NotifyBegin( GLcontext *ctx, GLenum mode )
{
   struct vbo_save_context *save = &vbo_context(ctx)->save; 

   GLuint i = save->prim_count++;

   assert(i < save->prim_max);
   save->prim[i].mode = mode & ~VBO_SAVE_PRIM_WEAK;
   save->prim[i].begin = 1;
   save->prim[i].end = 0;
   save->prim[i].weak = (mode & VBO_SAVE_PRIM_WEAK) ? 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;   

   _mesa_install_save_vtxfmt( ctx, &save->vtxfmt );      
   ctx->Driver.SaveNeedFlush = 1;
   return GL_TRUE;
}



static void GLAPIENTRY _save_End( void )
{
   GET_CURRENT_CONTEXT( ctx ); 
   struct vbo_save_context *save = &vbo_context(ctx)->save; 
   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.
    */   
   _mesa_install_save_vtxfmt( ctx, &ctx->ListState.ListVtxfmt );
}


/* These are all errors as this vtxfmt is only installed inside
 * begin/end pairs.
 */
static void GLAPIENTRY _save_DrawElements(GLenum mode, GLsizei count, GLenum type,
                               const GLvoid *indices)
{
   GET_CURRENT_CONTEXT(ctx);
   (void) mode; (void) count; (void) type; (void) indices;
   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "glDrawElements" );
}


static void GLAPIENTRY _save_DrawRangeElements(GLenum mode,
                                    GLuint start, GLuint end,
                                    GLsizei count, GLenum type,
                                    const GLvoid *indices)
{
   GET_CURRENT_CONTEXT(ctx);
   (void) mode; (void) start; (void) end; (void) count; (void) type; (void) indices;
   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "glDrawRangeElements" );
}

static void GLAPIENTRY _save_DrawElementsBaseVertex(GLenum mode,
                                                    GLsizei count,
                                                    GLenum type,
                                                    const GLvoid *indices,
                                                    GLint basevertex)
{
   GET_CURRENT_CONTEXT(ctx);
   (void) mode; (void) count; (void) type; (void) indices; (void)basevertex;

   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "glDrawElements" );
}

static void GLAPIENTRY _save_DrawRangeElementsBaseVertex(GLenum mode,
                                                         GLuint start,
                                                         GLuint end,
                                                         GLsizei count,
                                                         GLenum type,
                                                         const GLvoid *indices,
                                                         GLint basevertex)
{
   GET_CURRENT_CONTEXT(ctx);
   (void) mode; (void) start; (void) end; (void) count; (void) type;
   (void) indices; (void)basevertex;

   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "glDrawRangeElements" );
}

static void GLAPIENTRY _save_DrawArrays(GLenum mode, GLint start, GLsizei count)
{
   GET_CURRENT_CONTEXT(ctx);
   (void) mode; (void) start; (void) count;
   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "glDrawArrays" );
}

static void GLAPIENTRY _save_Rectf( GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2 )
{
   GET_CURRENT_CONTEXT(ctx);
   (void) x1; (void) y1; (void) x2; (void) y2;
   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "glRectf" );
}

static void GLAPIENTRY _save_EvalMesh1( GLenum mode, GLint i1, GLint i2 )
{
   GET_CURRENT_CONTEXT(ctx);
   (void) mode; (void) i1; (void) i2;
   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "glEvalMesh1" );
}

static void GLAPIENTRY _save_EvalMesh2( GLenum mode, GLint i1, GLint i2,
                                  GLint j1, GLint j2 )
{
   GET_CURRENT_CONTEXT(ctx);
   (void) mode; (void) i1; (void) i2; (void) j1; (void) j2;
   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "glEvalMesh2" );
}

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


/* 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.
 */
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);
   GLint i;

   if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
      return;

   _ae_map_vbos( ctx );

   vbo_save_NotifyBegin( ctx, mode | VBO_SAVE_PRIM_WEAK );

   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);
   GLint i;

   if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices, 0 ))
      return;

   _ae_map_vbos( ctx );

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

   vbo_save_NotifyBegin( ctx, mode | VBO_SAVE_PRIM_WEAK );

   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);
   if (_mesa_validate_DrawRangeElements( ctx, mode,
                                         start, end,
                                         count, type, indices, 0 ))
      _save_OBE_DrawElements( mode, count, type, indices );
}





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

   _MESA_INIT_ARRAYELT_VTXFMT(vfmt, _ae_);

   vfmt->Begin = _save_Begin;
   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->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;
   
   /* This will all require us to fallback to saving the list as opcodes:
    */ 
   _MESA_INIT_DLIST_VTXFMT(vfmt, _save_); /* inside begin/end */

   _MESA_INIT_EVAL_VTXFMT(vfmt, _save_);

   /* These are all errors as we at least know we are in some sort of
    * begin/end pair:
    */
   vfmt->Begin = _save_Begin;
   vfmt->Rectf = _save_Rectf;
   vfmt->DrawArrays = _save_DrawArrays;
   vfmt->DrawElements = _save_DrawElements;
   vfmt->DrawRangeElements = _save_DrawRangeElements;
   vfmt->DrawElementsBaseVertex = _save_DrawElementsBaseVertex;
   vfmt->DrawRangeElementsBaseVertex = _save_DrawRangeElementsBaseVertex;
   /* Loops back into vfmt->DrawElements */
   vfmt->MultiDrawElementsEXT = _mesa_noop_MultiDrawElements;
   vfmt->MultiDrawElementsBaseVertex = _mesa_noop_MultiDrawElementsBaseVertex;
}


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

   /* Noop when we are actually active:
    */
   if (ctx->Driver.CurrentSavePrimitive == PRIM_INSIDE_UNKNOWN_PRIM ||
       ctx->Driver.CurrentSavePrimitive <= GL_POLYGON)
      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 = 0;
}

void vbo_save_NewList( GLcontext *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 = map_vertex_store( ctx, save->vertex_store );
   
   _save_reset_vertex( ctx );
   _save_reset_counters( ctx );  
   ctx->Driver.SaveNeedFlush = 0;
}

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

   /* EndList called inside a (saved) Begin/End pair?
    */
   if (ctx->Driver.CurrentSavePrimitive != PRIM_OUTSIDE_BEGIN_END) {

      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 = 1;
      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 );
   }

   unmap_vertex_store( ctx, save->vertex_store );

   assert(save->vertex_size == 0);
}
 
void vbo_save_BeginCallList( GLcontext *ctx, struct gl_display_list *dlist )
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   save->replay_flags |= dlist->Flags;
}

void vbo_save_EndCallList( GLcontext *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( GLcontext *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 );

   if (node->current_data) {
      FREE(node->current_data);
      node->current_data = NULL;
   }
}


static void vbo_print_vertex_list( GLcontext *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];
      _mesa_debug(NULL, "   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)");
   }
}


static void _save_current_init( GLcontext *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
 */
void vbo_save_api_init( struct vbo_save_context *save )
{
   GLcontext *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 );

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

   /* Hook our array functions into the outside-begin-end vtxfmt in 
    * ctx->ListState.
    */
   ctx->ListState.ListVtxfmt.Rectf = _save_OBE_Rectf;
   ctx->ListState.ListVtxfmt.DrawArrays = _save_OBE_DrawArrays;
   ctx->ListState.ListVtxfmt.DrawElements = _save_OBE_DrawElements;
   ctx->ListState.ListVtxfmt.DrawRangeElements = _save_OBE_DrawRangeElements;
   /* loops back into _save_OBE_DrawElements */
   ctx->ListState.ListVtxfmt.MultiDrawElementsEXT = _mesa_noop_MultiDrawElements;
   ctx->ListState.ListVtxfmt.MultiDrawElementsBaseVertex = _mesa_noop_MultiDrawElementsBaseVertex;
   _mesa_install_save_vtxfmt( ctx, &ctx->ListState.ListVtxfmt );
}


#endif /* FEATURE_dlist */