svn merge ^/branches/released .

1 files changed, 627 insertions, 626 deletions

diff --git a/mesalib/src/mesa/vbo/vbo_split_copy.c b/mesalib/src/mesa/vbo/vbo_split_copy.c
index 8c981f93e..3a869d712 100644
--- a/mesalib/src/mesa/vbo/vbo_split_copy.c
+++ b/mesalib/src/mesa/vbo/vbo_split_copy.c
@@ -1,626 +1,627 @@
-
-/*
- * Mesa 3-D graphics library
- * Version:  6.5
- *
- * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- *    Keith Whitwell <keith@tungstengraphics.com>
- */
-
-/* Split indexed primitives with per-vertex copying.
- */
-
-#include "main/glheader.h"
-#include "main/bufferobj.h"
-#include "main/imports.h"
-#include "main/image.h"
-#include "main/macros.h"
-#include "main/mtypes.h"
-
-#include "vbo_split.h"
-#include "vbo.h"
-
-
-#define ELT_TABLE_SIZE 16
-
-/**
- * Used for vertex-level splitting of indexed buffers.  Note that
- * non-indexed primitives may be converted to indexed in some cases
- * (eg loops, fans) in order to use this splitting path.
- */
-struct copy_context {
-
-   struct gl_context *ctx;
-   const struct gl_client_array **array;
-   const struct _mesa_prim *prim;
-   GLuint nr_prims;
-   const struct _mesa_index_buffer *ib;
-   vbo_draw_func draw;
-
-   const struct split_limits *limits;
-
-   struct {
-      GLuint attr;
-      GLuint size;
-      const struct gl_client_array *array;
-      const GLubyte *src_ptr;
-
-      struct gl_client_array dstarray;
-
-   } varying[VERT_ATTRIB_MAX];
-   GLuint nr_varying;
-
-   const struct gl_client_array *dstarray_ptr[VERT_ATTRIB_MAX];
-   struct _mesa_index_buffer dstib;
-
-   GLuint *translated_elt_buf;
-   const GLuint *srcelt;
-
-   /** A baby hash table to avoid re-emitting (some) duplicate
-    * vertices when splitting indexed primitives.
-    */
-   struct { 
-      GLuint in;
-      GLuint out;
-   } vert_cache[ELT_TABLE_SIZE];
-
-   GLuint vertex_size;
-   GLubyte *dstbuf;
-   GLubyte *dstptr;     /**< dstptr == dstbuf + dstelt_max * vertsize */
-   GLuint dstbuf_size;  /**< in vertices */
-   GLuint dstbuf_nr;    /**< count of emitted vertices, also the largest value
-                         * in dstelt.  Our MaxIndex.
-                         */
-
-   GLuint *dstelt;
-   GLuint dstelt_nr;
-   GLuint dstelt_size;
-
-#define MAX_PRIM 32
-   struct _mesa_prim dstprim[MAX_PRIM];
-   GLuint dstprim_nr;
-
-};
-
-
-static GLuint attr_size( const struct gl_client_array *array )
-{
-   return array->Size * _mesa_sizeof_type(array->Type);
-}
-
-
-/**
- * Starts returning true slightly before the buffer fills, to ensure
- * that there is sufficient room for any remaining vertices to finish
- * off the prim:
- */
-static GLboolean
-check_flush( struct copy_context *copy )
-{
-   GLenum mode = copy->dstprim[copy->dstprim_nr].mode; 
-
-   if (GL_TRIANGLE_STRIP == mode &&
-       copy->dstelt_nr & 1) { /* see bug9962 */
-       return GL_FALSE;
-   }
-
-   if (copy->dstbuf_nr + 4 > copy->dstbuf_size)
-      return GL_TRUE;
-
-   if (copy->dstelt_nr + 4 > copy->dstelt_size)
-      return GL_TRUE;
-
-   return GL_FALSE;
-}
-
-
-/**
- * Dump the parameters/info for a vbo->draw() call.
- */
-static void
-dump_draw_info(struct gl_context *ctx,
-               const struct gl_client_array **arrays,
-               const struct _mesa_prim *prims,
-               GLuint nr_prims,
-               const struct _mesa_index_buffer *ib,
-               GLuint min_index,
-               GLuint max_index)
-{
-   GLuint i, j;
-
-   printf("VBO Draw:\n");
-   for (i = 0; i < nr_prims; i++) {
-      printf("Prim %u of %u\n", i, nr_prims);
-      printf("  Prim mode 0x%x\n", prims[i].mode);
-      printf("  IB: %p\n", (void*) ib);
-      for (j = 0; j < VERT_ATTRIB_MAX; j++) {
-         printf("    array %d at %p:\n", j, (void*) arrays[j]);
-         printf("      enabled %d, ptr %p, size %d, type 0x%x, stride %d\n",
-		arrays[j]->Enabled, arrays[j]->Ptr,
-		arrays[j]->Size, arrays[j]->Type, arrays[j]->StrideB);
-         if (0) {
-            GLint k = prims[i].start + prims[i].count - 1;
-            GLfloat *last = (GLfloat *) (arrays[j]->Ptr + arrays[j]->Stride * k);
-            printf("        last: %f %f %f\n",
-		   last[0], last[1], last[2]);
-         }
-      }
-   }
-}
-
-
-static void
-flush( struct copy_context *copy )
-{
-   GLuint i;
-
-   /* Set some counters: 
-    */
-   copy->dstib.count = copy->dstelt_nr;
-
-#if 0
-   dump_draw_info(copy->ctx,
-                  copy->dstarray_ptr,
-                  copy->dstprim,
-                  copy->dstprim_nr,
-                  &copy->dstib,
-                  0,
-                  copy->dstbuf_nr);
-#else
-   (void) dump_draw_info;
-#endif
-
-   copy->draw( copy->ctx,
-	       copy->dstarray_ptr,
-	       copy->dstprim,
-	       copy->dstprim_nr,
-	       &copy->dstib,
-	       GL_TRUE,
-	       0,
-	       copy->dstbuf_nr - 1 );
-
-   /* Reset all pointers: 
-    */
-   copy->dstprim_nr = 0;
-   copy->dstelt_nr = 0;
-   copy->dstbuf_nr = 0;
-   copy->dstptr = copy->dstbuf;
-
-   /* Clear the vertex cache:
-    */
-   for (i = 0; i < ELT_TABLE_SIZE; i++)
-      copy->vert_cache[i].in = ~0;
-}
-
-
-/**
- * Called at begin of each primitive during replay.
- */
-static void
-begin( struct copy_context *copy, GLenum mode, GLboolean begin_flag )
-{
-   struct _mesa_prim *prim = &copy->dstprim[copy->dstprim_nr];
-
-   prim->mode = mode;
-   prim->begin = begin_flag;
-   prim->num_instances = 1;
-}
-
-
-/**
- * Use a hashtable to attempt to identify recently-emitted vertices
- * and avoid re-emitting them.
- */
-static GLuint
-elt(struct copy_context *copy, GLuint elt_idx)
-{
-   GLuint elt = copy->srcelt[elt_idx];
-   GLuint slot = elt & (ELT_TABLE_SIZE-1);
-
-/*    printf("elt %d\n", elt); */
-
-   /* Look up the incoming element in the vertex cache.  Re-emit if
-    * necessary.   
-    */
-   if (copy->vert_cache[slot].in != elt) {
-      GLubyte *csr = copy->dstptr;
-      GLuint i;
-
-/*       printf("  --> emit to dstelt %d\n", copy->dstbuf_nr); */
-
-      for (i = 0; i < copy->nr_varying; i++) {
-	 const struct gl_client_array *srcarray = copy->varying[i].array;
-	 const GLubyte *srcptr = copy->varying[i].src_ptr + elt * srcarray->StrideB;
-
-	 memcpy(csr, srcptr, copy->varying[i].size);
-	 csr += copy->varying[i].size;
-
-#ifdef NAN_CHECK
-         if (srcarray->Type == GL_FLOAT) {
-            GLuint k;
-            GLfloat *f = (GLfloat *) srcptr;
-            for (k = 0; k < srcarray->Size; k++) {
-               assert(!IS_INF_OR_NAN(f[k]));
-               assert(f[k] <= 1.0e20 && f[k] >= -1.0e20);
-            }
-         }
-#endif
-
-	 if (0) 
-	 {
-	    const GLuint *f = (const GLuint *)srcptr;
-	    GLuint j;
-	    printf("  varying %d: ", i);
-	    for(j = 0; j < copy->varying[i].size / 4; j++)
-	       printf("%x ", f[j]);
-	    printf("\n");
-	 }
-      }
-
-      copy->vert_cache[slot].in = elt;
-      copy->vert_cache[slot].out = copy->dstbuf_nr++;
-      copy->dstptr += copy->vertex_size;
-
-      assert(csr == copy->dstptr);
-      assert(copy->dstptr == (copy->dstbuf +
-                              copy->dstbuf_nr * copy->vertex_size));
-   }
-/*    else */
-/*       printf("  --> reuse vertex\n"); */
-   
-/*    printf("  --> emit %d\n", copy->vert_cache[slot].out); */
-   copy->dstelt[copy->dstelt_nr++] = copy->vert_cache[slot].out;
-   return check_flush(copy);
-}
-
-
-/**
- * Called at end of each primitive during replay.
- */
-static void
-end( struct copy_context *copy, GLboolean end_flag )
-{
-   struct _mesa_prim *prim = &copy->dstprim[copy->dstprim_nr];
-
-/*    printf("end (%d)\n", end_flag); */
-
-   prim->end = end_flag;
-   prim->count = copy->dstelt_nr - prim->start;
-
-   if (++copy->dstprim_nr == MAX_PRIM ||
-       check_flush(copy)) 
-      flush(copy);
-}
-
-
-static void
-replay_elts( struct copy_context *copy )
-{
-   GLuint i, j, k;
-   GLboolean split;
-
-   for (i = 0; i < copy->nr_prims; i++) {
-      const struct _mesa_prim *prim = &copy->prim[i];
-      const GLuint start = prim->start;
-      GLuint first, incr;
-
-      switch (prim->mode) {
-	 
-      case GL_LINE_LOOP:
-	 /* Convert to linestrip and emit the final vertex explicitly,
-	  * but only in the resultant strip that requires it.
-	  */
-	 j = 0;
-	 while (j != prim->count) {
-	    begin(copy, GL_LINE_STRIP, prim->begin && j == 0);
-
-	    for (split = GL_FALSE; j != prim->count && !split; j++)
-	       split = elt(copy, start + j);
-
-	    if (j == prim->count) {
-	       /* Done, emit final line.  Split doesn't matter as
-		* it is always raised a bit early so we can emit
-		* the last verts if necessary!
-		*/
-	       if (prim->end) 
-		  (void)elt(copy, start + 0);
-
-	       end(copy, prim->end);
-	    }
-	    else {
-	       /* Wrap
-		*/
-	       assert(split);
-	       end(copy, 0);
-	       j--;
-	    }
-	 }
-	 break;
-
-      case GL_TRIANGLE_FAN:
-      case GL_POLYGON:
-	 j = 2;
-	 while (j != prim->count) {
-	    begin(copy, prim->mode, prim->begin && j == 0);
-
-	    split = elt(copy, start+0); 
-	    assert(!split);
-
-	    split = elt(copy, start+j-1); 
-	    assert(!split);
-
-	    for (; j != prim->count && !split; j++)
-	       split = elt(copy, start+j);
-
-	    end(copy, prim->end && j == prim->count);
-
-	    if (j != prim->count) {
-	       /* Wrapped the primitive, need to repeat some vertices:
-		*/
-	       j -= 1;
-	    }
-	 }
-	 break;
-
-      default:
-	 (void)split_prim_inplace(prim->mode, &first, &incr);
-	 
-	 j = 0;
-	 while (j != prim->count) {
-
-	    begin(copy, prim->mode, prim->begin && j == 0);
-
-	    split = 0;
-	    for (k = 0; k < first; k++, j++)
-	       split |= elt(copy, start+j);
-
-	    assert(!split);
-
-	    for (; j != prim->count && !split; )
-	       for (k = 0; k < incr; k++, j++)
-		  split |= elt(copy, start+j);
-
-	    end(copy, prim->end && j == prim->count);
-
-	    if (j != prim->count) {
-	       /* Wrapped the primitive, need to repeat some vertices:
-		*/
-	       assert(j > first - incr);
-	       j -= (first - incr);
-	    }
-	 }
-	 break;
-      }
-   }
-
-   if (copy->dstprim_nr)
-      flush(copy);
-}
-
-
-static void
-replay_init( struct copy_context *copy )
-{
-   struct gl_context *ctx = copy->ctx;
-   GLuint i;
-   GLuint offset;
-   const GLvoid *srcptr;
-
-   /* Make a list of varying attributes and their vbo's.  Also
-    * calculate vertex size.
-    */
-   copy->vertex_size = 0;
-   for (i = 0; i < VERT_ATTRIB_MAX; i++) {
-      struct gl_buffer_object *vbo = copy->array[i]->BufferObj;
-
-      if (copy->array[i]->StrideB == 0) {
-	 copy->dstarray_ptr[i] = copy->array[i];
-      }
-      else {
-	 GLuint j = copy->nr_varying++;
-	 
-	 copy->varying[j].attr = i;
-	 copy->varying[j].array = copy->array[i];
-	 copy->varying[j].size = attr_size(copy->array[i]);
-	 copy->vertex_size += attr_size(copy->array[i]);
-      
-	 if (_mesa_is_bufferobj(vbo) && !_mesa_bufferobj_mapped(vbo)) 
-	    ctx->Driver.MapBuffer(ctx, GL_ARRAY_BUFFER, GL_READ_ONLY, vbo);
-
-	 copy->varying[j].src_ptr = ADD_POINTERS(vbo->Pointer,
-						 copy->array[i]->Ptr);
-
-	 copy->dstarray_ptr[i] = &copy->varying[j].dstarray;
-      }
-   }
-
-   /* There must always be an index buffer.  Currently require the
-    * caller convert non-indexed prims to indexed.  Could alternately
-    * do it internally.
-    */
-   if (_mesa_is_bufferobj(copy->ib->obj) &&
-       !_mesa_bufferobj_mapped(copy->ib->obj)) 
-      ctx->Driver.MapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER, GL_READ_ONLY,
-			    copy->ib->obj);
-
-   srcptr = (const GLubyte *) ADD_POINTERS(copy->ib->obj->Pointer,
-                                           copy->ib->ptr);
-
-   switch (copy->ib->type) {
-   case GL_UNSIGNED_BYTE:
-      copy->translated_elt_buf = malloc(sizeof(GLuint) * copy->ib->count);
-      copy->srcelt = copy->translated_elt_buf;
-
-      for (i = 0; i < copy->ib->count; i++)
-	 copy->translated_elt_buf[i] = ((const GLubyte *)srcptr)[i];
-      break;
-
-   case GL_UNSIGNED_SHORT:
-      copy->translated_elt_buf = malloc(sizeof(GLuint) * copy->ib->count);
-      copy->srcelt = copy->translated_elt_buf;
-
-      for (i = 0; i < copy->ib->count; i++)
-	 copy->translated_elt_buf[i] = ((const GLushort *)srcptr)[i];
-      break;
-
-   case GL_UNSIGNED_INT:
-      copy->translated_elt_buf = NULL;
-      copy->srcelt = (const GLuint *)srcptr;
-      break;
-   }
-
-   /* Figure out the maximum allowed vertex buffer size:
-    */
-   if (copy->vertex_size * copy->limits->max_verts <= copy->limits->max_vb_size) {
-      copy->dstbuf_size = copy->limits->max_verts;
-   }
-   else {
-      copy->dstbuf_size = copy->limits->max_vb_size / copy->vertex_size;
-   }
-
-   /* Allocate an output vertex buffer:
-    *
-    * XXX:  This should be a VBO!
-    */
-   copy->dstbuf = malloc(copy->dstbuf_size * copy->vertex_size);   
-   copy->dstptr = copy->dstbuf;
-
-   /* Setup new vertex arrays to point into the output buffer: 
-    */
-   for (offset = 0, i = 0; i < copy->nr_varying; i++) {
-      const struct gl_client_array *src = copy->varying[i].array;
-      struct gl_client_array *dst = &copy->varying[i].dstarray;
-
-      dst->Size = src->Size;
-      dst->Type = src->Type;
-      dst->Format = GL_RGBA;
-      dst->Stride = copy->vertex_size;
-      dst->StrideB = copy->vertex_size;
-      dst->Ptr = copy->dstbuf + offset;
-      dst->Enabled = GL_TRUE;
-      dst->Normalized = src->Normalized; 
-      dst->BufferObj = ctx->Shared->NullBufferObj;
-      dst->_MaxElement = copy->dstbuf_size; /* may be less! */
-
-      offset += copy->varying[i].size;
-   }
-
-   /* Allocate an output element list:
-    */
-   copy->dstelt_size = MIN2(65536,
-			    copy->ib->count * 2 + 3);
-   copy->dstelt_size = MIN2(copy->dstelt_size,
-			    copy->limits->max_indices);
-   copy->dstelt = malloc(sizeof(GLuint) * copy->dstelt_size);
-   copy->dstelt_nr = 0;
-
-   /* Setup the new index buffer to point to the allocated element
-    * list:
-    */
-   copy->dstib.count = 0;	/* duplicates dstelt_nr */
-   copy->dstib.type = GL_UNSIGNED_INT;
-   copy->dstib.obj = ctx->Shared->NullBufferObj;
-   copy->dstib.ptr = copy->dstelt;
-}
-
-
-/**
- * Free up everything allocated during split/replay.
- */
-static void
-replay_finish( struct copy_context *copy )
-{
-   struct gl_context *ctx = copy->ctx;
-   GLuint i;
-
-   /* Free our vertex and index buffers: 
-    */
-   free(copy->translated_elt_buf);
-   free(copy->dstbuf);
-   free(copy->dstelt);
-
-   /* Unmap VBO's 
-    */
-   for (i = 0; i < copy->nr_varying; i++) {
-      struct gl_buffer_object *vbo = copy->varying[i].array->BufferObj;
-      if (_mesa_is_bufferobj(vbo) && _mesa_bufferobj_mapped(vbo)) 
-	 ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER, vbo);
-   }
-
-   /* Unmap index buffer:
-    */
-   if (_mesa_is_bufferobj(copy->ib->obj) &&
-       _mesa_bufferobj_mapped(copy->ib->obj)) {
-      ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER, copy->ib->obj);
-   }
-}
-
-
-/**
- * Split VBO into smaller pieces, draw the pieces.
- */
-void vbo_split_copy( struct gl_context *ctx,
-		     const struct gl_client_array *arrays[],
-		     const struct _mesa_prim *prim,
-		     GLuint nr_prims,
-		     const struct _mesa_index_buffer *ib,
-		     vbo_draw_func draw,
-		     const struct split_limits *limits )
-{
-   struct copy_context copy;
-   GLuint i, this_nr_prims;
-
-   for (i = 0; i < nr_prims;) {
-      /* Our SW TNL pipeline doesn't handle basevertex yet, so bind_indices
-       * will rebase the elements to the basevertex, and we'll only
-       * emit strings of prims with the same basevertex in one draw call.
-       */
-      for (this_nr_prims = 1; i + this_nr_prims < nr_prims;
-	   this_nr_prims++) {
-	 if (prim[i].basevertex != prim[i + this_nr_prims].basevertex)
-	    break;
-      }
-
-      memset(&copy, 0, sizeof(copy));
-
-      /* Require indexed primitives:
-       */
-      assert(ib);
-
-      copy.ctx = ctx;
-      copy.array = arrays;
-      copy.prim = &prim[i];
-      copy.nr_prims = this_nr_prims;
-      copy.ib = ib;
-      copy.draw = draw;
-      copy.limits = limits;
-
-      /* Clear the vertex cache:
-       */
-      for (i = 0; i < ELT_TABLE_SIZE; i++)
-	 copy.vert_cache[i].in = ~0;
-
-      replay_init(&copy);
-      replay_elts(&copy);
-      replay_finish(&copy);
-   }
-}
+

+/*

+ * Mesa 3-D graphics library

+ * Version:  6.5

+ *

+ * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is furnished to do so, subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice shall be included

+ * in all copies or substantial portions of the Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+ *

+ * Authors:

+ *    Keith Whitwell <keith@tungstengraphics.com>

+ */

+

+/* Split indexed primitives with per-vertex copying.

+ */

+

+#include "main/glheader.h"

+#include "main/bufferobj.h"

+#include "main/imports.h"

+#include "main/image.h"

+#include "main/macros.h"

+#include "main/mtypes.h"

+

+#include "vbo_split.h"

+#include "vbo.h"

+

+

+#define ELT_TABLE_SIZE 16

+

+/**

+ * Used for vertex-level splitting of indexed buffers.  Note that

+ * non-indexed primitives may be converted to indexed in some cases

+ * (eg loops, fans) in order to use this splitting path.

+ */

+struct copy_context {

+

+   struct gl_context *ctx;

+   const struct gl_client_array **array;

+   const struct _mesa_prim *prim;

+   GLuint nr_prims;

+   const struct _mesa_index_buffer *ib;

+   vbo_draw_func draw;

+

+   const struct split_limits *limits;

+

+   struct {

+      GLuint attr;

+      GLuint size;

+      const struct gl_client_array *array;

+      const GLubyte *src_ptr;

+

+      struct gl_client_array dstarray;

+

+   } varying[VERT_ATTRIB_MAX];

+   GLuint nr_varying;

+

+   const struct gl_client_array *dstarray_ptr[VERT_ATTRIB_MAX];

+   struct _mesa_index_buffer dstib;

+

+   GLuint *translated_elt_buf;

+   const GLuint *srcelt;

+

+   /** A baby hash table to avoid re-emitting (some) duplicate

+    * vertices when splitting indexed primitives.

+    */

+   struct { 

+      GLuint in;

+      GLuint out;

+   } vert_cache[ELT_TABLE_SIZE];

+

+   GLuint vertex_size;

+   GLubyte *dstbuf;

+   GLubyte *dstptr;     /**< dstptr == dstbuf + dstelt_max * vertsize */

+   GLuint dstbuf_size;  /**< in vertices */

+   GLuint dstbuf_nr;    /**< count of emitted vertices, also the largest value

+                         * in dstelt.  Our MaxIndex.

+                         */

+

+   GLuint *dstelt;

+   GLuint dstelt_nr;

+   GLuint dstelt_size;

+

+#define MAX_PRIM 32

+   struct _mesa_prim dstprim[MAX_PRIM];

+   GLuint dstprim_nr;

+

+};

+

+

+static GLuint attr_size( const struct gl_client_array *array )

+{

+   return array->Size * _mesa_sizeof_type(array->Type);

+}

+

+

+/**

+ * Starts returning true slightly before the buffer fills, to ensure

+ * that there is sufficient room for any remaining vertices to finish

+ * off the prim:

+ */

+static GLboolean

+check_flush( struct copy_context *copy )

+{

+   GLenum mode = copy->dstprim[copy->dstprim_nr].mode; 

+

+   if (GL_TRIANGLE_STRIP == mode &&

+       copy->dstelt_nr & 1) { /* see bug9962 */

+       return GL_FALSE;

+   }

+

+   if (copy->dstbuf_nr + 4 > copy->dstbuf_size)

+      return GL_TRUE;

+

+   if (copy->dstelt_nr + 4 > copy->dstelt_size)

+      return GL_TRUE;

+

+   return GL_FALSE;

+}

+

+

+/**

+ * Dump the parameters/info for a vbo->draw() call.

+ */

+static void

+dump_draw_info(struct gl_context *ctx,

+               const struct gl_client_array **arrays,

+               const struct _mesa_prim *prims,

+               GLuint nr_prims,

+               const struct _mesa_index_buffer *ib,

+               GLuint min_index,

+               GLuint max_index)

+{

+   GLuint i, j;

+

+   printf("VBO Draw:\n");

+   for (i = 0; i < nr_prims; i++) {

+      printf("Prim %u of %u\n", i, nr_prims);

+      printf("  Prim mode 0x%x\n", prims[i].mode);

+      printf("  IB: %p\n", (void*) ib);

+      for (j = 0; j < VERT_ATTRIB_MAX; j++) {

+         printf("    array %d at %p:\n", j, (void*) arrays[j]);

+         printf("      enabled %d, ptr %p, size %d, type 0x%x, stride %d\n",

+		arrays[j]->Enabled, arrays[j]->Ptr,

+		arrays[j]->Size, arrays[j]->Type, arrays[j]->StrideB);

+         if (0) {

+            GLint k = prims[i].start + prims[i].count - 1;

+            GLfloat *last = (GLfloat *) (arrays[j]->Ptr + arrays[j]->Stride * k);

+            printf("        last: %f %f %f\n",

+		   last[0], last[1], last[2]);

+         }

+      }

+   }

+}

+

+

+static void

+flush( struct copy_context *copy )

+{

+   GLuint i;

+

+   /* Set some counters: 

+    */

+   copy->dstib.count = copy->dstelt_nr;

+

+#if 0

+   dump_draw_info(copy->ctx,

+                  copy->dstarray_ptr,

+                  copy->dstprim,

+                  copy->dstprim_nr,

+                  &copy->dstib,

+                  0,

+                  copy->dstbuf_nr);

+#else

+   (void) dump_draw_info;

+#endif

+

+   copy->draw( copy->ctx,

+	       copy->dstarray_ptr,

+	       copy->dstprim,

+	       copy->dstprim_nr,

+	       &copy->dstib,

+	       GL_TRUE,

+	       0,

+	       copy->dstbuf_nr - 1 );

+

+   /* Reset all pointers: 

+    */

+   copy->dstprim_nr = 0;

+   copy->dstelt_nr = 0;

+   copy->dstbuf_nr = 0;

+   copy->dstptr = copy->dstbuf;

+

+   /* Clear the vertex cache:

+    */

+   for (i = 0; i < ELT_TABLE_SIZE; i++)

+      copy->vert_cache[i].in = ~0;

+}

+

+

+/**

+ * Called at begin of each primitive during replay.

+ */

+static void

+begin( struct copy_context *copy, GLenum mode, GLboolean begin_flag )

+{

+   struct _mesa_prim *prim = &copy->dstprim[copy->dstprim_nr];

+

+   prim->mode = mode;

+   prim->begin = begin_flag;

+   prim->num_instances = 1;

+}

+

+

+/**

+ * Use a hashtable to attempt to identify recently-emitted vertices

+ * and avoid re-emitting them.

+ */

+static GLuint

+elt(struct copy_context *copy, GLuint elt_idx)

+{

+   GLuint elt = copy->srcelt[elt_idx];

+   GLuint slot = elt & (ELT_TABLE_SIZE-1);

+

+/*    printf("elt %d\n", elt); */

+

+   /* Look up the incoming element in the vertex cache.  Re-emit if

+    * necessary.   

+    */

+   if (copy->vert_cache[slot].in != elt) {

+      GLubyte *csr = copy->dstptr;

+      GLuint i;

+

+/*       printf("  --> emit to dstelt %d\n", copy->dstbuf_nr); */

+

+      for (i = 0; i < copy->nr_varying; i++) {

+	 const struct gl_client_array *srcarray = copy->varying[i].array;

+	 const GLubyte *srcptr = copy->varying[i].src_ptr + elt * srcarray->StrideB;

+

+	 memcpy(csr, srcptr, copy->varying[i].size);

+	 csr += copy->varying[i].size;

+

+#ifdef NAN_CHECK

+         if (srcarray->Type == GL_FLOAT) {

+            GLuint k;

+            GLfloat *f = (GLfloat *) srcptr;

+            for (k = 0; k < srcarray->Size; k++) {

+               assert(!IS_INF_OR_NAN(f[k]));

+               assert(f[k] <= 1.0e20 && f[k] >= -1.0e20);

+            }

+         }

+#endif

+

+	 if (0) 

+	 {

+	    const GLuint *f = (const GLuint *)srcptr;

+	    GLuint j;

+	    printf("  varying %d: ", i);

+	    for(j = 0; j < copy->varying[i].size / 4; j++)

+	       printf("%x ", f[j]);

+	    printf("\n");

+	 }

+      }

+

+      copy->vert_cache[slot].in = elt;

+      copy->vert_cache[slot].out = copy->dstbuf_nr++;

+      copy->dstptr += copy->vertex_size;

+

+      assert(csr == copy->dstptr);

+      assert(copy->dstptr == (copy->dstbuf +

+                              copy->dstbuf_nr * copy->vertex_size));

+   }

+/*    else */

+/*       printf("  --> reuse vertex\n"); */

+   

+/*    printf("  --> emit %d\n", copy->vert_cache[slot].out); */

+   copy->dstelt[copy->dstelt_nr++] = copy->vert_cache[slot].out;

+   return check_flush(copy);

+}

+

+

+/**

+ * Called at end of each primitive during replay.

+ */

+static void

+end( struct copy_context *copy, GLboolean end_flag )

+{

+   struct _mesa_prim *prim = &copy->dstprim[copy->dstprim_nr];

+

+/*    printf("end (%d)\n", end_flag); */

+

+   prim->end = end_flag;

+   prim->count = copy->dstelt_nr - prim->start;

+

+   if (++copy->dstprim_nr == MAX_PRIM ||

+       check_flush(copy)) 

+      flush(copy);

+}

+

+

+static void

+replay_elts( struct copy_context *copy )

+{

+   GLuint i, j, k;

+   GLboolean split;

+

+   for (i = 0; i < copy->nr_prims; i++) {

+      const struct _mesa_prim *prim = &copy->prim[i];

+      const GLuint start = prim->start;

+      GLuint first, incr;

+

+      switch (prim->mode) {

+	 

+      case GL_LINE_LOOP:

+	 /* Convert to linestrip and emit the final vertex explicitly,

+	  * but only in the resultant strip that requires it.

+	  */

+	 j = 0;

+	 while (j != prim->count) {

+	    begin(copy, GL_LINE_STRIP, prim->begin && j == 0);

+

+	    for (split = GL_FALSE; j != prim->count && !split; j++)

+	       split = elt(copy, start + j);

+

+	    if (j == prim->count) {

+	       /* Done, emit final line.  Split doesn't matter as

+		* it is always raised a bit early so we can emit

+		* the last verts if necessary!

+		*/

+	       if (prim->end) 

+		  (void)elt(copy, start + 0);

+

+	       end(copy, prim->end);

+	    }

+	    else {

+	       /* Wrap

+		*/

+	       assert(split);

+	       end(copy, 0);

+	       j--;

+	    }

+	 }

+	 break;

+

+      case GL_TRIANGLE_FAN:

+      case GL_POLYGON:

+	 j = 2;

+	 while (j != prim->count) {

+	    begin(copy, prim->mode, prim->begin && j == 0);

+

+	    split = elt(copy, start+0); 

+	    assert(!split);

+

+	    split = elt(copy, start+j-1); 

+	    assert(!split);

+

+	    for (; j != prim->count && !split; j++)

+	       split = elt(copy, start+j);

+

+	    end(copy, prim->end && j == prim->count);

+

+	    if (j != prim->count) {

+	       /* Wrapped the primitive, need to repeat some vertices:

+		*/

+	       j -= 1;

+	    }

+	 }

+	 break;

+

+      default:

+	 (void)split_prim_inplace(prim->mode, &first, &incr);

+	 

+	 j = 0;

+	 while (j != prim->count) {

+

+	    begin(copy, prim->mode, prim->begin && j == 0);

+

+	    split = 0;

+	    for (k = 0; k < first; k++, j++)

+	       split |= elt(copy, start+j);

+

+	    assert(!split);

+

+	    for (; j != prim->count && !split; )

+	       for (k = 0; k < incr; k++, j++)

+		  split |= elt(copy, start+j);

+

+	    end(copy, prim->end && j == prim->count);

+

+	    if (j != prim->count) {

+	       /* Wrapped the primitive, need to repeat some vertices:

+		*/

+	       assert(j > first - incr);

+	       j -= (first - incr);

+	    }

+	 }

+	 break;

+      }

+   }

+

+   if (copy->dstprim_nr)

+      flush(copy);

+}

+

+

+static void

+replay_init( struct copy_context *copy )

+{

+   struct gl_context *ctx = copy->ctx;

+   GLuint i;

+   GLuint offset;

+   const GLvoid *srcptr;

+

+   /* Make a list of varying attributes and their vbo's.  Also

+    * calculate vertex size.

+    */

+   copy->vertex_size = 0;

+   for (i = 0; i < VERT_ATTRIB_MAX; i++) {

+      struct gl_buffer_object *vbo = copy->array[i]->BufferObj;

+

+      if (copy->array[i]->StrideB == 0) {

+	 copy->dstarray_ptr[i] = copy->array[i];

+      }

+      else {

+	 GLuint j = copy->nr_varying++;

+	 

+	 copy->varying[j].attr = i;

+	 copy->varying[j].array = copy->array[i];

+	 copy->varying[j].size = attr_size(copy->array[i]);

+	 copy->vertex_size += attr_size(copy->array[i]);

+      

+	 if (_mesa_is_bufferobj(vbo) && !_mesa_bufferobj_mapped(vbo)) 

+	    ctx->Driver.MapBuffer(ctx, GL_ARRAY_BUFFER, GL_READ_ONLY, vbo);

+

+	 copy->varying[j].src_ptr = ADD_POINTERS(vbo->Pointer,

+						 copy->array[i]->Ptr);

+

+	 copy->dstarray_ptr[i] = &copy->varying[j].dstarray;

+      }

+   }

+

+   /* There must always be an index buffer.  Currently require the

+    * caller convert non-indexed prims to indexed.  Could alternately

+    * do it internally.

+    */

+   if (_mesa_is_bufferobj(copy->ib->obj) &&

+       !_mesa_bufferobj_mapped(copy->ib->obj)) 

+      ctx->Driver.MapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER, GL_READ_ONLY,

+			    copy->ib->obj);

+

+   srcptr = (const GLubyte *) ADD_POINTERS(copy->ib->obj->Pointer,

+                                           copy->ib->ptr);

+

+   switch (copy->ib->type) {

+   case GL_UNSIGNED_BYTE:

+      copy->translated_elt_buf = malloc(sizeof(GLuint) * copy->ib->count);

+      copy->srcelt = copy->translated_elt_buf;

+

+      for (i = 0; i < copy->ib->count; i++)

+	 copy->translated_elt_buf[i] = ((const GLubyte *)srcptr)[i];

+      break;

+

+   case GL_UNSIGNED_SHORT:

+      copy->translated_elt_buf = malloc(sizeof(GLuint) * copy->ib->count);

+      copy->srcelt = copy->translated_elt_buf;

+

+      for (i = 0; i < copy->ib->count; i++)

+	 copy->translated_elt_buf[i] = ((const GLushort *)srcptr)[i];

+      break;

+

+   case GL_UNSIGNED_INT:

+      copy->translated_elt_buf = NULL;

+      copy->srcelt = (const GLuint *)srcptr;

+      break;

+   }

+

+   /* Figure out the maximum allowed vertex buffer size:

+    */

+   if (copy->vertex_size * copy->limits->max_verts <= copy->limits->max_vb_size) {

+      copy->dstbuf_size = copy->limits->max_verts;

+   }

+   else {

+      copy->dstbuf_size = copy->limits->max_vb_size / copy->vertex_size;

+   }

+

+   /* Allocate an output vertex buffer:

+    *

+    * XXX:  This should be a VBO!

+    */

+   copy->dstbuf = malloc(copy->dstbuf_size * copy->vertex_size);   

+   copy->dstptr = copy->dstbuf;

+

+   /* Setup new vertex arrays to point into the output buffer: 

+    */

+   for (offset = 0, i = 0; i < copy->nr_varying; i++) {

+      const struct gl_client_array *src = copy->varying[i].array;

+      struct gl_client_array *dst = &copy->varying[i].dstarray;

+

+      dst->Size = src->Size;

+      dst->Type = src->Type;

+      dst->Format = GL_RGBA;

+      dst->Stride = copy->vertex_size;

+      dst->StrideB = copy->vertex_size;

+      dst->Ptr = copy->dstbuf + offset;

+      dst->Enabled = GL_TRUE;

+      dst->Normalized = src->Normalized; 

+      dst->BufferObj = ctx->Shared->NullBufferObj;

+      dst->_ElementSize = src->_ElementSize;

+      dst->_MaxElement = copy->dstbuf_size; /* may be less! */

+

+      offset += copy->varying[i].size;

+   }

+

+   /* Allocate an output element list:

+    */

+   copy->dstelt_size = MIN2(65536,

+			    copy->ib->count * 2 + 3);

+   copy->dstelt_size = MIN2(copy->dstelt_size,

+			    copy->limits->max_indices);

+   copy->dstelt = malloc(sizeof(GLuint) * copy->dstelt_size);

+   copy->dstelt_nr = 0;

+

+   /* Setup the new index buffer to point to the allocated element

+    * list:

+    */

+   copy->dstib.count = 0;	/* duplicates dstelt_nr */

+   copy->dstib.type = GL_UNSIGNED_INT;

+   copy->dstib.obj = ctx->Shared->NullBufferObj;

+   copy->dstib.ptr = copy->dstelt;

+}

+

+

+/**

+ * Free up everything allocated during split/replay.

+ */

+static void

+replay_finish( struct copy_context *copy )

+{

+   struct gl_context *ctx = copy->ctx;

+   GLuint i;

+

+   /* Free our vertex and index buffers: 

+    */

+   free(copy->translated_elt_buf);

+   free(copy->dstbuf);

+   free(copy->dstelt);

+

+   /* Unmap VBO's 

+    */

+   for (i = 0; i < copy->nr_varying; i++) {

+      struct gl_buffer_object *vbo = copy->varying[i].array->BufferObj;

+      if (_mesa_is_bufferobj(vbo) && _mesa_bufferobj_mapped(vbo)) 

+	 ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER, vbo);

+   }

+

+   /* Unmap index buffer:

+    */

+   if (_mesa_is_bufferobj(copy->ib->obj) &&

+       _mesa_bufferobj_mapped(copy->ib->obj)) {

+      ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER, copy->ib->obj);

+   }

+}

+

+

+/**

+ * Split VBO into smaller pieces, draw the pieces.

+ */

+void vbo_split_copy( struct gl_context *ctx,

+		     const struct gl_client_array *arrays[],

+		     const struct _mesa_prim *prim,

+		     GLuint nr_prims,

+		     const struct _mesa_index_buffer *ib,

+		     vbo_draw_func draw,

+		     const struct split_limits *limits )

+{

+   struct copy_context copy;

+   GLuint i, this_nr_prims;

+

+   for (i = 0; i < nr_prims;) {

+      /* Our SW TNL pipeline doesn't handle basevertex yet, so bind_indices

+       * will rebase the elements to the basevertex, and we'll only

+       * emit strings of prims with the same basevertex in one draw call.

+       */

+      for (this_nr_prims = 1; i + this_nr_prims < nr_prims;

+	   this_nr_prims++) {

+	 if (prim[i].basevertex != prim[i + this_nr_prims].basevertex)

+	    break;

+      }

+

+      memset(&copy, 0, sizeof(copy));

+

+      /* Require indexed primitives:

+       */

+      assert(ib);

+

+      copy.ctx = ctx;

+      copy.array = arrays;

+      copy.prim = &prim[i];

+      copy.nr_prims = this_nr_prims;

+      copy.ib = ib;

+      copy.draw = draw;

+      copy.limits = limits;

+

+      /* Clear the vertex cache:

+       */

+      for (i = 0; i < ELT_TABLE_SIZE; i++)

+	 copy.vert_cache[i].in = ~0;

+

+      replay_init(&copy);

+      replay_elts(&copy);

+      replay_finish(&copy);

+   }

+}