xserver pixman mesa git update 23 Feb 2011

1 files changed, 1324 insertions, 1307 deletions

diff --git a/mesalib/src/mesa/vbo/vbo_exec_array.c b/mesalib/src/mesa/vbo/vbo_exec_array.c
index 65a0642f1..457343a1a 100644
--- a/mesalib/src/mesa/vbo/vbo_exec_array.c
+++ b/mesalib/src/mesa/vbo/vbo_exec_array.c
@@ -1,1307 +1,1324 @@
-/**************************************************************************

- * 

- * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.

- * Copyright 2009 VMware, Inc.

- * 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, sub license, 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 (including the

- * next paragraph) 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 NON-INFRINGEMENT.

- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.

- * 

- **************************************************************************/

-

-#include "main/glheader.h"

-#include "main/context.h"

-#include "main/state.h"

-#include "main/api_validate.h"

-#include "main/varray.h"

-#include "main/bufferobj.h"

-#include "main/enums.h"

-#include "main/macros.h"

-

-#include "vbo_context.h"

-

-

-/**

- * All vertex buffers should be in an unmapped state when we're about

- * to draw.  This debug function checks that.

- */

-static void

-check_buffers_are_unmapped(const struct gl_client_array **inputs)

-{

-#ifdef DEBUG

-   GLuint i;

-

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

-      if (inputs[i]) {

-         struct gl_buffer_object *obj = inputs[i]->BufferObj;

-         assert(!_mesa_bufferobj_mapped(obj));

-      }

-   }

-#endif

-}

-

-

-/**

- * Compute min and max elements by scanning the index buffer for

- * glDraw[Range]Elements() calls.

- * If primitive restart is enabled, we need to ignore restart

- * indexes when computing min/max.

- */

-void

-vbo_get_minmax_index(struct gl_context *ctx,

-		     const struct _mesa_prim *prim,

-		     const struct _mesa_index_buffer *ib,

-		     GLuint *min_index, GLuint *max_index)

-{

-   const GLboolean restart = ctx->Array.PrimitiveRestart;

-   const GLuint restartIndex = ctx->Array.RestartIndex;

-   const GLuint count = prim->count;

-   const void *indices;

-   GLuint i;

-

-   if (_mesa_is_bufferobj(ib->obj)) {

-      const GLvoid *map =

-         ctx->Driver.MapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB,

-                               GL_READ_ONLY, ib->obj);

-      indices = ADD_POINTERS(map, ib->ptr);

-   } else {

-      indices = ib->ptr;

-   }

-

-   switch (ib->type) {

-   case GL_UNSIGNED_INT: {

-      const GLuint *ui_indices = (const GLuint *)indices;

-      GLuint max_ui = 0;

-      GLuint min_ui = ~0U;

-      if (restart) {

-         for (i = 0; i < count; i++) {

-            if (ui_indices[i] != restartIndex) {

-               if (ui_indices[i] > max_ui) max_ui = ui_indices[i];

-               if (ui_indices[i] < min_ui) min_ui = ui_indices[i];

-            }

-         }

-      }

-      else {

-         for (i = 0; i < count; i++) {

-            if (ui_indices[i] > max_ui) max_ui = ui_indices[i];

-            if (ui_indices[i] < min_ui) min_ui = ui_indices[i];

-         }

-      }

-      *min_index = min_ui;

-      *max_index = max_ui;

-      break;

-   }

-   case GL_UNSIGNED_SHORT: {

-      const GLushort *us_indices = (const GLushort *)indices;

-      GLuint max_us = 0;

-      GLuint min_us = ~0U;

-      if (restart) {

-         for (i = 0; i < count; i++) {

-            if (us_indices[i] != restartIndex) {

-               if (us_indices[i] > max_us) max_us = us_indices[i];

-               if (us_indices[i] < min_us) min_us = us_indices[i];

-            }

-         }

-      }

-      else {

-         for (i = 0; i < count; i++) {

-            if (us_indices[i] > max_us) max_us = us_indices[i];

-            if (us_indices[i] < min_us) min_us = us_indices[i];

-         }

-      }

-      *min_index = min_us;

-      *max_index = max_us;

-      break;

-   }

-   case GL_UNSIGNED_BYTE: {

-      const GLubyte *ub_indices = (const GLubyte *)indices;

-      GLuint max_ub = 0;

-      GLuint min_ub = ~0U;

-      if (restart) {

-         for (i = 0; i < count; i++) {

-            if (ub_indices[i] != restartIndex) {

-               if (ub_indices[i] > max_ub) max_ub = ub_indices[i];

-               if (ub_indices[i] < min_ub) min_ub = ub_indices[i];

-            }

-         }

-      }

-      else {

-         for (i = 0; i < count; i++) {

-            if (ub_indices[i] > max_ub) max_ub = ub_indices[i];

-            if (ub_indices[i] < min_ub) min_ub = ub_indices[i];

-         }

-      }

-      *min_index = min_ub;

-      *max_index = max_ub;

-      break;

-   }

-   default:

-      assert(0);

-      break;

-   }

-

-   if (_mesa_is_bufferobj(ib->obj)) {

-      ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB, ib->obj);

-   }

-}

-

-

-/**

- * Check that element 'j' of the array has reasonable data.

- * Map VBO if needed.

- * For debugging purposes; not normally used.

- */

-static void

-check_array_data(struct gl_context *ctx, struct gl_client_array *array,

-                 GLuint attrib, GLuint j)

-{

-   if (array->Enabled) {

-      const void *data = array->Ptr;

-      if (_mesa_is_bufferobj(array->BufferObj)) {

-         if (!array->BufferObj->Pointer) {

-            /* need to map now */

-            array->BufferObj->Pointer =

-               ctx->Driver.MapBuffer(ctx, GL_ARRAY_BUFFER_ARB,

-                                     GL_READ_ONLY, array->BufferObj);

-         }

-         data = ADD_POINTERS(data, array->BufferObj->Pointer);

-      }

-      switch (array->Type) {

-      case GL_FLOAT:

-         {

-            GLfloat *f = (GLfloat *) ((GLubyte *) data + array->StrideB * j);

-            GLint k;

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

-               if (IS_INF_OR_NAN(f[k]) ||

-                   f[k] >= 1.0e20 || f[k] <= -1.0e10) {

-                  printf("Bad array data:\n");

-                  printf("  Element[%u].%u = %f\n", j, k, f[k]);

-                  printf("  Array %u at %p\n", attrib, (void* ) array);

-                  printf("  Type 0x%x, Size %d, Stride %d\n",

-			 array->Type, array->Size, array->Stride);

-                  printf("  Address/offset %p in Buffer Object %u\n",

-			 array->Ptr, array->BufferObj->Name);

-                  f[k] = 1.0; /* XXX replace the bad value! */

-               }

-               /*assert(!IS_INF_OR_NAN(f[k]));*/

-            }

-         }

-         break;

-      default:

-         ;

-      }

-   }

-}

-

-

-/**

- * Unmap the buffer object referenced by given array, if mapped.

- */

-static void

-unmap_array_buffer(struct gl_context *ctx, struct gl_client_array *array)

-{

-   if (array->Enabled &&

-       _mesa_is_bufferobj(array->BufferObj) &&

-       _mesa_bufferobj_mapped(array->BufferObj)) {

-      ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB, array->BufferObj);

-   }

-}

-

-

-/**

- * Examine the array's data for NaNs, etc.

- * For debug purposes; not normally used.

- */

-static void

-check_draw_elements_data(struct gl_context *ctx, GLsizei count, GLenum elemType,

-                         const void *elements, GLint basevertex)

-{

-   struct gl_array_object *arrayObj = ctx->Array.ArrayObj;

-   const void *elemMap;

-   GLint i, k;

-

-   if (_mesa_is_bufferobj(ctx->Array.ElementArrayBufferObj)) {

-      elemMap = ctx->Driver.MapBuffer(ctx,

-                                      GL_ELEMENT_ARRAY_BUFFER_ARB,

-                                      GL_READ_ONLY,

-                                      ctx->Array.ElementArrayBufferObj);

-      elements = ADD_POINTERS(elements, elemMap);

-   }

-

-   for (i = 0; i < count; i++) {

-      GLuint j;

-

-      /* j = element[i] */

-      switch (elemType) {

-      case GL_UNSIGNED_BYTE:

-         j = ((const GLubyte *) elements)[i];

-         break;

-      case GL_UNSIGNED_SHORT:

-         j = ((const GLushort *) elements)[i];

-         break;

-      case GL_UNSIGNED_INT:

-         j = ((const GLuint *) elements)[i];

-         break;

-      default:

-         assert(0);

-      }

-

-      /* check element j of each enabled array */

-      check_array_data(ctx, &arrayObj->Vertex, VERT_ATTRIB_POS, j);

-      check_array_data(ctx, &arrayObj->Normal, VERT_ATTRIB_NORMAL, j);

-      check_array_data(ctx, &arrayObj->Color, VERT_ATTRIB_COLOR0, j);

-      check_array_data(ctx, &arrayObj->SecondaryColor, VERT_ATTRIB_COLOR1, j);

-      for (k = 0; k < Elements(arrayObj->TexCoord); k++) {

-         check_array_data(ctx, &arrayObj->TexCoord[k], VERT_ATTRIB_TEX0 + k, j);

-      }

-      for (k = 0; k < Elements(arrayObj->VertexAttrib); k++) {

-         check_array_data(ctx, &arrayObj->VertexAttrib[k],

-                          VERT_ATTRIB_GENERIC0 + k, j);

-      }

-   }

-

-   if (_mesa_is_bufferobj(ctx->Array.ElementArrayBufferObj)) {

-      ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB,

-			      ctx->Array.ElementArrayBufferObj);

-   }

-

-   unmap_array_buffer(ctx, &arrayObj->Vertex);

-   unmap_array_buffer(ctx, &arrayObj->Normal);

-   unmap_array_buffer(ctx, &arrayObj->Color);

-   for (k = 0; k < Elements(arrayObj->TexCoord); k++) {

-      unmap_array_buffer(ctx, &arrayObj->TexCoord[k]);

-   }

-   for (k = 0; k < Elements(arrayObj->VertexAttrib); k++) {

-      unmap_array_buffer(ctx, &arrayObj->VertexAttrib[k]);

-   }

-}

-

-

-/**

- * Check array data, looking for NaNs, etc.

- */

-static void

-check_draw_arrays_data(struct gl_context *ctx, GLint start, GLsizei count)

-{

-   /* TO DO */

-}

-

-

-/**

- * Print info/data for glDrawArrays(), for debugging.

- */

-static void

-print_draw_arrays(struct gl_context *ctx,

-                  GLenum mode, GLint start, GLsizei count)

-{

-   struct vbo_context *vbo = vbo_context(ctx);

-   struct vbo_exec_context *exec = &vbo->exec;

-   int i;

-

-   printf("vbo_exec_DrawArrays(mode 0x%x, start %d, count %d):\n",

-	  mode, start, count);

-

-   for (i = 0; i < 32; i++) {

-      GLuint bufName = exec->array.inputs[i]->BufferObj->Name;

-      GLint stride = exec->array.inputs[i]->Stride;

-      printf("attr %2d: size %d stride %d  enabled %d  "

-	     "ptr %p  Bufobj %u\n",

-	     i,

-	     exec->array.inputs[i]->Size,

-	     stride,

-	     /*exec->array.inputs[i]->Enabled,*/

-	     exec->array.legacy_array[i]->Enabled,

-	     exec->array.inputs[i]->Ptr,

-	     bufName);

-

-      if (bufName) {

-         struct gl_buffer_object *buf = _mesa_lookup_bufferobj(ctx, bufName);

-         GLubyte *p = ctx->Driver.MapBuffer(ctx, GL_ARRAY_BUFFER_ARB,

-                                            GL_READ_ONLY_ARB, buf);

-         int offset = (int) (GLintptr) exec->array.inputs[i]->Ptr;

-         float *f = (float *) (p + offset);

-         int *k = (int *) f;

-         int i;

-         int n = (count * stride) / 4;

-         if (n > 32)

-            n = 32;

-         printf("  Data at offset %d:\n", offset);

-         for (i = 0; i < n; i++) {

-            printf("    float[%d] = 0x%08x %f\n", i, k[i], f[i]);

-         }

-         ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB, buf);

-      }

-   }

-}

-

-

-/**

- * Bind the VBO executor to the current vertex array object prior

- * to drawing.

- *

- * Just translate the arrayobj into a sane layout.

- */

-static void

-bind_array_obj(struct gl_context *ctx)

-{

-   struct vbo_context *vbo = vbo_context(ctx);

-   struct vbo_exec_context *exec = &vbo->exec;

-   struct gl_array_object *arrayObj = ctx->Array.ArrayObj;

-   GLuint i;

-

-   /* TODO: Fix the ArrayObj struct to keep legacy arrays in an array

-    * rather than as individual named arrays.  Then this function can

-    * go away.

-    */

-   exec->array.legacy_array[VERT_ATTRIB_POS] = &arrayObj->Vertex;

-   exec->array.legacy_array[VERT_ATTRIB_WEIGHT] = &arrayObj->Weight;

-   exec->array.legacy_array[VERT_ATTRIB_NORMAL] = &arrayObj->Normal;

-   exec->array.legacy_array[VERT_ATTRIB_COLOR0] = &arrayObj->Color;

-   exec->array.legacy_array[VERT_ATTRIB_COLOR1] = &arrayObj->SecondaryColor;

-   exec->array.legacy_array[VERT_ATTRIB_FOG] = &arrayObj->FogCoord;

-   exec->array.legacy_array[VERT_ATTRIB_COLOR_INDEX] = &arrayObj->Index;

-   if (arrayObj->PointSize.Enabled) {

-      /* this aliases COLOR_INDEX */

-      exec->array.legacy_array[VERT_ATTRIB_POINT_SIZE] = &arrayObj->PointSize;

-   }

-   exec->array.legacy_array[VERT_ATTRIB_EDGEFLAG] = &arrayObj->EdgeFlag;

-

-   for (i = 0; i < Elements(arrayObj->TexCoord); i++)

-      exec->array.legacy_array[VERT_ATTRIB_TEX0 + i] = &arrayObj->TexCoord[i];

-

-   for (i = 0; i < Elements(arrayObj->VertexAttrib); i++) {

-      assert(i < Elements(exec->array.generic_array));

-      exec->array.generic_array[i] = &arrayObj->VertexAttrib[i];

-   }

-   

-   exec->array.array_obj = arrayObj->Name;

-}

-

-

-/**

- * Set the vbo->exec->inputs[] pointers to point to the enabled

- * vertex arrays.  This depends on the current vertex program/shader

- * being executed because of whether or not generic vertex arrays

- * alias the conventional vertex arrays.

- * For arrays that aren't enabled, we set the input[attrib] pointer

- * to point at a zero-stride current value "array".

- */

-static void

-recalculate_input_bindings(struct gl_context *ctx)

-{

-   struct vbo_context *vbo = vbo_context(ctx);

-   struct vbo_exec_context *exec = &vbo->exec;

-   const struct gl_client_array **inputs = &exec->array.inputs[0];

-   GLbitfield const_inputs = 0x0;

-   GLuint i;

-

-   exec->array.program_mode = get_program_mode(ctx);

-   exec->array.enabled_flags = ctx->Array.ArrayObj->_Enabled;

-

-   switch (exec->array.program_mode) {

-   case VP_NONE:

-      /* When no vertex program is active (or the vertex program is generated

-       * from fixed-function state).  We put the material values into the

-       * generic slots.  This is the only situation where material values

-       * are available as per-vertex attributes.

-       */

-      for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {

-	 if (exec->array.legacy_array[i]->Enabled)

-	    inputs[i] = exec->array.legacy_array[i];

-	 else {

-	    inputs[i] = &vbo->legacy_currval[i];

-            const_inputs |= 1 << i;

-         }

-      }

-

-      for (i = 0; i < MAT_ATTRIB_MAX; i++) {

-	 inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->mat_currval[i];

-         const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);

-      }

-

-      /* Could use just about anything, just to fill in the empty

-       * slots:

-       */

-      for (i = MAT_ATTRIB_MAX; i < VERT_ATTRIB_MAX - VERT_ATTRIB_GENERIC0; i++) {

-	 inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];

-         const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);

-      }

-      break;

-

-   case VP_NV:

-      /* NV_vertex_program - attribute arrays alias and override

-       * conventional, legacy arrays.  No materials, and the generic

-       * slots are vacant.

-       */

-      for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {

-	 if (exec->array.generic_array[i]->Enabled)

-	    inputs[i] = exec->array.generic_array[i];

-	 else if (exec->array.legacy_array[i]->Enabled)

-	    inputs[i] = exec->array.legacy_array[i];

-	 else {

-	    inputs[i] = &vbo->legacy_currval[i];

-            const_inputs |= 1 << i;

-         }

-      }

-

-      /* Could use just about anything, just to fill in the empty

-       * slots:

-       */

-      for (i = VERT_ATTRIB_GENERIC0; i < VERT_ATTRIB_MAX; i++) {

-	 inputs[i] = &vbo->generic_currval[i - VERT_ATTRIB_GENERIC0];

-         const_inputs |= 1 << i;

-      }

-      break;

-

-   case VP_ARB:

-      /* GL_ARB_vertex_program or GLSL vertex shader - Only the generic[0]

-       * attribute array aliases and overrides the legacy position array.  

-       *

-       * Otherwise, legacy attributes available in the legacy slots,

-       * generic attributes in the generic slots and materials are not

-       * available as per-vertex attributes.

-       */

-      if (exec->array.generic_array[0]->Enabled)

-	 inputs[0] = exec->array.generic_array[0];

-      else if (exec->array.legacy_array[0]->Enabled)

-	 inputs[0] = exec->array.legacy_array[0];

-      else {

-	 inputs[0] = &vbo->legacy_currval[0];

-         const_inputs |= 1 << 0;

-      }

-

-      for (i = 1; i <= VERT_ATTRIB_TEX7; i++) {

-	 if (exec->array.legacy_array[i]->Enabled)

-	    inputs[i] = exec->array.legacy_array[i];

-	 else {

-	    inputs[i] = &vbo->legacy_currval[i];

-            const_inputs |= 1 << i;

-         }

-      }

-

-      for (i = 0; i < MAX_VERTEX_GENERIC_ATTRIBS; i++) {

-	 if (exec->array.generic_array[i]->Enabled)

-	    inputs[VERT_ATTRIB_GENERIC0 + i] = exec->array.generic_array[i];

-	 else {

-	    inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];

-            const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);

-         }

-

-      }

-      break;

-   }

-

-   _mesa_set_varying_vp_inputs( ctx, ~const_inputs );

-}

-

-

-/**

- * Examine the enabled vertex arrays to set the exec->array.inputs[] values.

- * These will point to the arrays to actually use for drawing.  Some will

- * be user-provided arrays, other will be zero-stride const-valued arrays.

- * Note that this might set the _NEW_ARRAY dirty flag so state validation

- * must be done after this call.

- */

-static void

-bind_arrays(struct gl_context *ctx)

-{

-   if (!ctx->Array.RebindArrays) {

-      return;

-   }

-

-   bind_array_obj(ctx);

-   recalculate_input_bindings(ctx);

-   ctx->Array.RebindArrays = GL_FALSE;

-}

-

-

-/**

- * Helper function called by the other DrawArrays() functions below.

- * This is where we handle primitive restart for drawing non-indexed

- * arrays.  If primitive restart is enabled, it typically means

- * splitting one DrawArrays() into two.

- */

-static void

-vbo_draw_arrays(struct gl_context *ctx, GLenum mode, GLint start,

-                GLsizei count, GLuint numInstances)

-{

-   struct vbo_context *vbo = vbo_context(ctx);

-   struct vbo_exec_context *exec = &vbo->exec;

-   struct _mesa_prim prim[2];

-

-   bind_arrays(ctx);

-

-   /* Again... because we may have changed the bitmask of per-vertex varying

-    * attributes.  If we regenerate the fixed-function vertex program now

-    * we may be able to prune down the number of vertex attributes which we

-    * need in the shader.

-    */

-   if (ctx->NewState)

-      _mesa_update_state(ctx);

-

-   prim[0].begin = 1;

-   prim[0].end = 1;

-   prim[0].weak = 0;

-   prim[0].pad = 0;

-   prim[0].mode = mode;

-   prim[0].start = 0; /* filled in below */

-   prim[0].count = 0; /* filled in below */

-   prim[0].indexed = 0;

-   prim[0].basevertex = 0;

-   prim[0].num_instances = numInstances;

-

-   /* Implement the primitive restart index */

-   if (ctx->Array.PrimitiveRestart && ctx->Array.RestartIndex < count) {

-      GLuint primCount = 0;

-

-      if (ctx->Array.RestartIndex == start) {

-         /* special case: RestartIndex at beginning */

-         if (count > 1) {

-            prim[0].start = start + 1;

-            prim[0].count = count - 1;

-            primCount = 1;

-         }

-      }

-      else if (ctx->Array.RestartIndex == start + count - 1) {

-         /* special case: RestartIndex at end */

-         if (count > 1) {

-            prim[0].start = start;

-            prim[0].count = count - 1;

-            primCount = 1;

-         }

-      }

-      else {

-         /* general case: RestartIndex in middle, split into two prims */

-         prim[0].start = start;

-         prim[0].count = ctx->Array.RestartIndex - start;

-

-         prim[1] = prim[0];

-         prim[1].start = ctx->Array.RestartIndex + 1;

-         prim[1].count = count - prim[1].start;

-

-         primCount = 2;

-      }

-

-      if (primCount > 0) {

-         /* draw one or two prims */

-         check_buffers_are_unmapped(exec->array.inputs);

-         vbo->draw_prims(ctx, exec->array.inputs, prim, primCount, NULL,

-                         GL_TRUE, start, start + count - 1);

-      }

-   }

-   else {

-      /* no prim restart */

-      prim[0].start = start;

-      prim[0].count = count;

-

-      check_buffers_are_unmapped(exec->array.inputs);

-      vbo->draw_prims(ctx, exec->array.inputs, prim, 1, NULL,

-                      GL_TRUE, start, start + count - 1);

-   }

-}

-

-

-

-/**

- * Called from glDrawArrays when in immediate mode (not display list mode).

- */

-static void GLAPIENTRY

-vbo_exec_DrawArrays(GLenum mode, GLint start, GLsizei count)

-{

-   GET_CURRENT_CONTEXT(ctx);

-

-   if (MESA_VERBOSE & VERBOSE_DRAW)

-      _mesa_debug(ctx, "glDrawArrays(%s, %d, %d)\n",

-                  _mesa_lookup_enum_by_nr(mode), start, count);

-

-   if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))

-      return;

-

-   FLUSH_CURRENT( ctx, 0 );

-

-   if (!_mesa_valid_to_render(ctx, "glDrawArrays")) {

-      return;

-   }

-

-   if (0)

-      check_draw_arrays_data(ctx, start, count);

-

-   vbo_draw_arrays(ctx, mode, start, count, 1);

-

-   if (0)

-      print_draw_arrays(ctx, mode, start, count);

-}

-

-

-/**

- * Called from glDrawArraysInstanced when in immediate mode (not

- * display list mode).

- */

-static void GLAPIENTRY

-vbo_exec_DrawArraysInstanced(GLenum mode, GLint start, GLsizei count,

-                             GLsizei numInstances)

-{

-   GET_CURRENT_CONTEXT(ctx);

-

-   if (MESA_VERBOSE & VERBOSE_DRAW)

-      _mesa_debug(ctx, "glDrawArraysInstanced(%s, %d, %d, %d)\n",

-                  _mesa_lookup_enum_by_nr(mode), start, count, numInstances);

-

-   if (!_mesa_validate_DrawArraysInstanced(ctx, mode, start, count, numInstances))

-      return;

-

-   FLUSH_CURRENT( ctx, 0 );

-

-   if (!_mesa_valid_to_render(ctx, "glDrawArraysInstanced")) {

-      return;

-   }

-

-   if (0)

-      check_draw_arrays_data(ctx, start, count);

-

-   vbo_draw_arrays(ctx, mode, start, count, numInstances);

-

-   if (0)

-      print_draw_arrays(ctx, mode, start, count);

-}

-

-

-/**

- * Map GL_ELEMENT_ARRAY_BUFFER and print contents.

- * For debugging.

- */

-static void

-dump_element_buffer(struct gl_context *ctx, GLenum type)

-{

-   const GLvoid *map = ctx->Driver.MapBuffer(ctx,

-                                             GL_ELEMENT_ARRAY_BUFFER_ARB,

-                                             GL_READ_ONLY,

-                                             ctx->Array.ElementArrayBufferObj);

-   switch (type) {

-   case GL_UNSIGNED_BYTE:

-      {

-         const GLubyte *us = (const GLubyte *) map;

-         GLint i;

-         for (i = 0; i < ctx->Array.ElementArrayBufferObj->Size; i++) {

-            printf("%02x ", us[i]);

-            if (i % 32 == 31)

-               printf("\n");

-         }

-         printf("\n");

-      }

-      break;

-   case GL_UNSIGNED_SHORT:

-      {

-         const GLushort *us = (const GLushort *) map;

-         GLint i;

-         for (i = 0; i < ctx->Array.ElementArrayBufferObj->Size / 2; i++) {

-            printf("%04x ", us[i]);

-            if (i % 16 == 15)

-               printf("\n");

-         }

-         printf("\n");

-      }

-      break;

-   case GL_UNSIGNED_INT:

-      {

-         const GLuint *us = (const GLuint *) map;

-         GLint i;

-         for (i = 0; i < ctx->Array.ElementArrayBufferObj->Size / 4; i++) {

-            printf("%08x ", us[i]);

-            if (i % 8 == 7)

-               printf("\n");

-         }

-         printf("\n");

-      }

-      break;

-   default:

-      ;

-   }

-

-   ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB,

-                           ctx->Array.ElementArrayBufferObj);

-}

-

-

-/**

- * Inner support for both _mesa_DrawElements and _mesa_DrawRangeElements.

- * Do the rendering for a glDrawElements or glDrawRangeElements call after

- * we've validated buffer bounds, etc.

- */

-static void

-vbo_validated_drawrangeelements(struct gl_context *ctx, GLenum mode,

-				GLboolean index_bounds_valid,

-				GLuint start, GLuint end,

-				GLsizei count, GLenum type,

-				const GLvoid *indices,

-				GLint basevertex, GLint numInstances)

-{

-   struct vbo_context *vbo = vbo_context(ctx);

-   struct vbo_exec_context *exec = &vbo->exec;

-   struct _mesa_index_buffer ib;

-   struct _mesa_prim prim[1];

-

-   FLUSH_CURRENT( ctx, 0 );

-

-   if (!_mesa_valid_to_render(ctx, "glDraw[Range]Elements")) {

-      return;

-   }

-

-   bind_arrays( ctx );

-

-   /* check for dirty state again */

-   if (ctx->NewState)

-      _mesa_update_state( ctx );

-

-   ib.count = count;

-   ib.type = type;

-   ib.obj = ctx->Array.ElementArrayBufferObj;

-   ib.ptr = indices;

-

-   prim[0].begin = 1;

-   prim[0].end = 1;

-   prim[0].weak = 0;

-   prim[0].pad = 0;

-   prim[0].mode = mode;

-   prim[0].start = 0;

-   prim[0].count = count;

-   prim[0].indexed = 1;

-   prim[0].basevertex = basevertex;

-   prim[0].num_instances = numInstances;

-

-   /* Need to give special consideration to rendering a range of

-    * indices starting somewhere above zero.  Typically the

-    * application is issuing multiple DrawRangeElements() to draw

-    * successive primitives layed out linearly in the vertex arrays.

-    * Unless the vertex arrays are all in a VBO (or locked as with

-    * CVA), the OpenGL semantics imply that we need to re-read or

-    * re-upload the vertex data on each draw call.  

-    *

-    * In the case of hardware tnl, we want to avoid starting the

-    * upload at zero, as it will mean every draw call uploads an

-    * increasing amount of not-used vertex data.  Worse - in the

-    * software tnl module, all those vertices might be transformed and

-    * lit but never rendered.

-    *

-    * If we just upload or transform the vertices in start..end,

-    * however, the indices will be incorrect.

-    *

-    * At this level, we don't know exactly what the requirements of

-    * the backend are going to be, though it will likely boil down to

-    * either:

-    *

-    * 1) Do nothing, everything is in a VBO and is processed once

-    *       only.

-    *

-    * 2) Adjust the indices and vertex arrays so that start becomes

-    *    zero.

-    *

-    * Rather than doing anything here, I'll provide a helper function

-    * for the latter case elsewhere.

-    */

-

-   check_buffers_are_unmapped(exec->array.inputs);

-   vbo->draw_prims( ctx, exec->array.inputs, prim, 1, &ib,

-		    index_bounds_valid, start, end );

-}

-

-

-/**

- * Called by glDrawRangeElementsBaseVertex() in immediate mode.

- */

-static void GLAPIENTRY

-vbo_exec_DrawRangeElementsBaseVertex(GLenum mode,

-				     GLuint start, GLuint end,

-				     GLsizei count, GLenum type,

-				     const GLvoid *indices,

-				     GLint basevertex)

-{

-   static GLuint warnCount = 0;

-   GET_CURRENT_CONTEXT(ctx);

-

-   if (MESA_VERBOSE & VERBOSE_DRAW)

-      _mesa_debug(ctx,

-                "glDrawRangeElementsBaseVertex(%s, %u, %u, %d, %s, %p, %d)\n",

-                _mesa_lookup_enum_by_nr(mode), start, end, count,

-                _mesa_lookup_enum_by_nr(type), indices, basevertex);

-

-   if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count,

-                                          type, indices, basevertex ))

-      return;

-

-   /* NOTE: It's important that 'end' is a reasonable value.

-    * in _tnl_draw_prims(), we use end to determine how many vertices

-    * to transform.  If it's too large, we can unnecessarily split prims

-    * or we can read/write out of memory in several different places!

-    */

-

-   /* Catch/fix some potential user errors */

-   if (type == GL_UNSIGNED_BYTE) {

-      start = MIN2(start, 0xff);

-      end = MIN2(end, 0xff);

-   }

-   else if (type == GL_UNSIGNED_SHORT) {

-      start = MIN2(start, 0xffff);

-      end = MIN2(end, 0xffff);

-   }

-

-   if (end >= ctx->Array.ArrayObj->_MaxElement) {

-      /* the max element is out of bounds of one or more enabled arrays */

-      warnCount++;

-

-      if (warnCount < 10) {

-         _mesa_warning(ctx, "glDraw[Range]Elements(start %u, end %u, count %d, "

-                       "type 0x%x, indices=%p)\n"

-                       "\tend is out of bounds (max=%u)  "

-                       "Element Buffer %u (size %d)\n"

-                       "\tThis should probably be fixed in the application.",

-                       start, end, count, type, indices,

-                       ctx->Array.ArrayObj->_MaxElement - 1,

-                       ctx->Array.ElementArrayBufferObj->Name,

-                       (int) ctx->Array.ElementArrayBufferObj->Size);

-      }

-

-      if (0)

-         dump_element_buffer(ctx, type);

-

-      if (0)

-         _mesa_print_arrays(ctx);

-

-#ifdef DEBUG

-      /* 'end' was out of bounds, but now let's check the actual array

-       * indexes to see if any of them are out of bounds.

-       */

-      {

-         GLuint max = _mesa_max_buffer_index(ctx, count, type, indices,

-                                             ctx->Array.ElementArrayBufferObj);

-         if (max >= ctx->Array.ArrayObj->_MaxElement) {

-            if (warnCount < 10) {

-               _mesa_warning(ctx, "glDraw[Range]Elements(start %u, end %u, "

-                             "count %d, type 0x%x, indices=%p)\n"

-                             "\tindex=%u is out of bounds (max=%u)  "

-                             "Element Buffer %u (size %d)\n"

-                             "\tSkipping the glDrawRangeElements() call",

-                             start, end, count, type, indices, max,

-                             ctx->Array.ArrayObj->_MaxElement - 1,

-                             ctx->Array.ElementArrayBufferObj->Name,

-                             (int) ctx->Array.ElementArrayBufferObj->Size);

-            }

-         }

-         /* XXX we could also find the min index and compare to 'start'

-          * to see if start is correct.  But it's more likely to get the

-          * upper bound wrong.

-          */

-      }

-#endif

-

-      /* Set 'end' to the max possible legal value */

-      assert(ctx->Array.ArrayObj->_MaxElement >= 1);

-      end = ctx->Array.ArrayObj->_MaxElement - 1;

-   }

-   else if (0) {

-      printf("glDraw[Range]Elements{,BaseVertex}"

-	     "(start %u, end %u, type 0x%x, count %d) ElemBuf %u, "

-	     "base %d\n",

-	     start, end, type, count,

-	     ctx->Array.ElementArrayBufferObj->Name,

-	     basevertex);

-   }

-

-#if 0

-   check_draw_elements_data(ctx, count, type, indices);

-#else

-   (void) check_draw_elements_data;

-#endif

-

-   vbo_validated_drawrangeelements(ctx, mode, GL_TRUE, start, end,

-				   count, type, indices, basevertex, 1);

-}

-

-

-/**

- * Called by glDrawRangeElements() in immediate mode.

- */

-static void GLAPIENTRY

-vbo_exec_DrawRangeElements(GLenum mode, GLuint start, GLuint end,

-                           GLsizei count, GLenum type, const GLvoid *indices)

-{

-   GET_CURRENT_CONTEXT(ctx);

-

-   if (MESA_VERBOSE & VERBOSE_DRAW)

-      _mesa_debug(ctx,

-                  "glDrawRangeElements(%s, %u, %u, %d, %s, %p)\n",

-                  _mesa_lookup_enum_by_nr(mode), start, end, count,

-                  _mesa_lookup_enum_by_nr(type), indices);

-

-   vbo_exec_DrawRangeElementsBaseVertex(mode, start, end, count, type,

-					indices, 0);

-}

-

-

-/**

- * Called by glDrawElements() in immediate mode.

- */

-static void GLAPIENTRY

-vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type,

-                      const GLvoid *indices)

-{

-   GET_CURRENT_CONTEXT(ctx);

-

-   if (MESA_VERBOSE & VERBOSE_DRAW)

-      _mesa_debug(ctx, "glDrawElements(%s, %u, %s, %p)\n",

-                  _mesa_lookup_enum_by_nr(mode), count,

-                  _mesa_lookup_enum_by_nr(type), indices);

-

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

-      return;

-

-   vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, ~0, ~0,

-				   count, type, indices, 0, 1);

-}

-

-

-/**

- * Called by glDrawElementsBaseVertex() in immediate mode.

- */

-static void GLAPIENTRY

-vbo_exec_DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type,

-				const GLvoid *indices, GLint basevertex)

-{

-   GET_CURRENT_CONTEXT(ctx);

-

-   if (MESA_VERBOSE & VERBOSE_DRAW)

-      _mesa_debug(ctx, "glDrawElementsBaseVertex(%s, %d, %s, %p, %d)\n",

-                  _mesa_lookup_enum_by_nr(mode), count,

-                  _mesa_lookup_enum_by_nr(type), indices, basevertex);

-

-   if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices,

-				     basevertex ))

-      return;

-

-   vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, ~0, ~0,

-				   count, type, indices, basevertex, 1);

-}

-

-

-/**

- * Called by glDrawElementsInstanced() in immediate mode.

- */

-static void GLAPIENTRY

-vbo_exec_DrawElementsInstanced(GLenum mode, GLsizei count, GLenum type,

-                               const GLvoid *indices, GLsizei numInstances)

-{

-   GET_CURRENT_CONTEXT(ctx);

-

-   if (MESA_VERBOSE & VERBOSE_DRAW)

-      _mesa_debug(ctx, "glDrawElementsInstanced(%s, %d, %s, %p, %d)\n",

-                  _mesa_lookup_enum_by_nr(mode), count,

-                  _mesa_lookup_enum_by_nr(type), indices, numInstances);

-

-   if (!_mesa_validate_DrawElementsInstanced(ctx, mode, count, type, indices,

-                                             numInstances))

-      return;

-

-   vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, ~0, ~0,

-				   count, type, indices, 0, numInstances);

-}

-

-

-/**

- * Inner support for both _mesa_MultiDrawElements() and

- * _mesa_MultiDrawRangeElements().

- * This does the actual rendering after we've checked array indexes, etc.

- */

-static void

-vbo_validated_multidrawelements(struct gl_context *ctx, GLenum mode,

-				const GLsizei *count, GLenum type,

-				const GLvoid **indices, GLsizei primcount,

-				const GLint *basevertex)

-{

-   struct vbo_context *vbo = vbo_context(ctx);

-   struct vbo_exec_context *exec = &vbo->exec;

-   struct _mesa_index_buffer ib;

-   struct _mesa_prim *prim;

-   unsigned int index_type_size = 0;

-   uintptr_t min_index_ptr, max_index_ptr;

-   GLboolean fallback = GL_FALSE;

-   int i;

-

-   if (primcount == 0)

-      return;

-

-   FLUSH_CURRENT( ctx, 0 );

-

-   if (!_mesa_valid_to_render(ctx, "glMultiDrawElements")) {

-      return;

-   }

-

-   prim = calloc(1, primcount * sizeof(*prim));

-   if (prim == NULL) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMultiDrawElements");

-      return;

-   }

-

-   /* Decide if we can do this all as one set of primitives sharing the

-    * same index buffer, or if we have to reset the index pointer per

-    * primitive.

-    */

-   bind_arrays( ctx );

-

-   /* check for dirty state again */

-   if (ctx->NewState)

-      _mesa_update_state( ctx );

-

-   switch (type) {

-   case GL_UNSIGNED_INT:

-      index_type_size = 4;

-      break;

-   case GL_UNSIGNED_SHORT:

-      index_type_size = 2;

-      break;

-   case GL_UNSIGNED_BYTE:

-      index_type_size = 1;

-      break;

-   default:

-      assert(0);

-   }

-

-   min_index_ptr = (uintptr_t)indices[0];

-   max_index_ptr = 0;

-   for (i = 0; i < primcount; i++) {

-      min_index_ptr = MIN2(min_index_ptr, (uintptr_t)indices[i]);

-      max_index_ptr = MAX2(max_index_ptr, (uintptr_t)indices[i] +

-			   index_type_size * count[i]);

-   }

-

-   /* Check if we can handle this thing as a bunch of index offsets from the

-    * same index pointer.  If we can't, then we have to fall back to doing

-    * a draw_prims per primitive.

-    * Check that the difference between each prim's indexes is a multiple of

-    * the index/element size.

-    */

-   if (index_type_size != 1) {

-      for (i = 0; i < primcount; i++) {

-	 if ((((uintptr_t)indices[i] - min_index_ptr) % index_type_size) != 0) {

-	    fallback = GL_TRUE;

-	    break;

-	 }

-      }

-   }

-

-   /* If the index buffer isn't in a VBO, then treating the application's

-    * subranges of the index buffer as one large index buffer may lead to

-    * us reading unmapped memory.

-    */

-   if (!_mesa_is_bufferobj(ctx->Array.ElementArrayBufferObj))

-      fallback = GL_TRUE;

-

-   if (!fallback) {

-      ib.count = (max_index_ptr - min_index_ptr) / index_type_size;

-      ib.type = type;

-      ib.obj = ctx->Array.ElementArrayBufferObj;

-      ib.ptr = (void *)min_index_ptr;

-

-      for (i = 0; i < primcount; i++) {

-	 prim[i].begin = (i == 0);

-	 prim[i].end = (i == primcount - 1);

-	 prim[i].weak = 0;

-	 prim[i].pad = 0;

-	 prim[i].mode = mode;

-	 prim[i].start = ((uintptr_t)indices[i] - min_index_ptr) / index_type_size;

-	 prim[i].count = count[i];

-	 prim[i].indexed = 1;

-         prim[i].num_instances = 1;

-	 if (basevertex != NULL)

-	    prim[i].basevertex = basevertex[i];

-	 else

-	    prim[i].basevertex = 0;

-      }

-

-      check_buffers_are_unmapped(exec->array.inputs);

-      vbo->draw_prims(ctx, exec->array.inputs, prim, primcount, &ib,

-		      GL_FALSE, ~0, ~0);

-   } else {

-      /* render one prim at a time */

-      for (i = 0; i < primcount; i++) {

-	 ib.count = count[i];

-	 ib.type = type;

-	 ib.obj = ctx->Array.ElementArrayBufferObj;

-	 ib.ptr = indices[i];

-

-	 prim[0].begin = 1;

-	 prim[0].end = 1;

-	 prim[0].weak = 0;

-	 prim[0].pad = 0;

-	 prim[0].mode = mode;

-	 prim[0].start = 0;

-	 prim[0].count = count[i];

-	 prim[0].indexed = 1;

-         prim[0].num_instances = 1;

-	 if (basevertex != NULL)

-	    prim[0].basevertex = basevertex[i];

-	 else

-	    prim[0].basevertex = 0;

-

-         check_buffers_are_unmapped(exec->array.inputs);

-         vbo->draw_prims(ctx, exec->array.inputs, prim, 1, &ib,

-                         GL_FALSE, ~0, ~0);

-      }

-   }

-

-   free(prim);

-}

-

-

-static void GLAPIENTRY

-vbo_exec_MultiDrawElements(GLenum mode,

-			   const GLsizei *count, GLenum type,

-			   const GLvoid **indices,

-			   GLsizei primcount)

-{

-   GET_CURRENT_CONTEXT(ctx);

-   GLint i;

-

-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

-

-   for (i = 0; i < primcount; i++) {

-      if (!_mesa_validate_DrawElements(ctx, mode, count[i], type, indices[i],

-				       0))

-	 return;

-   }

-

-   vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount,

-				   NULL);

-}

-

-

-static void GLAPIENTRY

-vbo_exec_MultiDrawElementsBaseVertex(GLenum mode,

-				     const GLsizei *count, GLenum type,

-				     const GLvoid **indices,

-				     GLsizei primcount,

-				     const GLsizei *basevertex)

-{

-   GET_CURRENT_CONTEXT(ctx);

-   GLint i;

-

-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

-

-   for (i = 0; i < primcount; i++) {

-      if (!_mesa_validate_DrawElements(ctx, mode, count[i], type, indices[i],

-				       basevertex[i]))

-	 return;

-   }

-

-   vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount,

-				   basevertex);

-}

-

-

-/**

- * Plug in the immediate-mode vertex array drawing commands into the

- * givven vbo_exec_context object.

- */

-void

-vbo_exec_array_init( struct vbo_exec_context *exec )

-{

-   exec->vtxfmt.DrawArrays = vbo_exec_DrawArrays;

-   exec->vtxfmt.DrawElements = vbo_exec_DrawElements;

-   exec->vtxfmt.DrawRangeElements = vbo_exec_DrawRangeElements;

-   exec->vtxfmt.MultiDrawElementsEXT = vbo_exec_MultiDrawElements;

-   exec->vtxfmt.DrawElementsBaseVertex = vbo_exec_DrawElementsBaseVertex;

-   exec->vtxfmt.DrawRangeElementsBaseVertex = vbo_exec_DrawRangeElementsBaseVertex;

-   exec->vtxfmt.MultiDrawElementsBaseVertex = vbo_exec_MultiDrawElementsBaseVertex;

-   exec->vtxfmt.DrawArraysInstanced = vbo_exec_DrawArraysInstanced;

-   exec->vtxfmt.DrawElementsInstanced = vbo_exec_DrawElementsInstanced;

-}

-

-

-void

-vbo_exec_array_destroy( struct vbo_exec_context *exec )

-{

-   /* nothing to do */

-}

-

-

-

-/**

- * The following functions are only used for OpenGL ES 1/2 support.

- * And some aren't even supported (yet) in ES 1/2.

- */

-

-

-void GLAPIENTRY

-_mesa_DrawArrays(GLenum mode, GLint first, GLsizei count)

-{

-   vbo_exec_DrawArrays(mode, first, count);

-}

-

-

-void GLAPIENTRY

-_mesa_DrawElements(GLenum mode, GLsizei count, GLenum type,

-                   const GLvoid *indices)

-{

-   vbo_exec_DrawElements(mode, count, type, indices);

-}

-

-

-void GLAPIENTRY

-_mesa_DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type,

-			     const GLvoid *indices, GLint basevertex)

-{

-   vbo_exec_DrawElementsBaseVertex(mode, count, type, indices, basevertex);

-}

-

-

-void GLAPIENTRY

-_mesa_DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count,

-                        GLenum type, const GLvoid *indices)

-{

-   vbo_exec_DrawRangeElements(mode, start, end, count, type, indices);

-}

-

-

-void GLAPIENTRY

-_mesa_DrawRangeElementsBaseVertex(GLenum mode, GLuint start, GLuint end,

-				  GLsizei count, GLenum type,

-				  const GLvoid *indices, GLint basevertex)

-{

-   vbo_exec_DrawRangeElementsBaseVertex(mode, start, end, count, type,

-					indices, basevertex);

-}

-

-

-void GLAPIENTRY

-_mesa_MultiDrawElementsEXT(GLenum mode, const GLsizei *count, GLenum type,

-			   const GLvoid **indices, GLsizei primcount)

-{

-   vbo_exec_MultiDrawElements(mode, count, type, indices, primcount);

-}

-

-

-void GLAPIENTRY

-_mesa_MultiDrawElementsBaseVertex(GLenum mode,

-				  const GLsizei *count, GLenum type,

-				  const GLvoid **indices, GLsizei primcount,

-				  const GLint *basevertex)

-{

-   vbo_exec_MultiDrawElementsBaseVertex(mode, count, type, indices,

-					primcount, basevertex);

-}

+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * Copyright 2009 VMware, Inc.
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ * 
+ **************************************************************************/
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/state.h"
+#include "main/api_validate.h"
+#include "main/varray.h"
+#include "main/bufferobj.h"
+#include "main/enums.h"
+#include "main/macros.h"
+
+#include "vbo_context.h"
+
+
+/**
+ * All vertex buffers should be in an unmapped state when we're about
+ * to draw.  This debug function checks that.
+ */
+static void
+check_buffers_are_unmapped(const struct gl_client_array **inputs)
+{
+#ifdef DEBUG
+   GLuint i;
+
+   for (i = 0; i < VERT_ATTRIB_MAX; i++) {
+      if (inputs[i]) {
+         struct gl_buffer_object *obj = inputs[i]->BufferObj;
+         assert(!_mesa_bufferobj_mapped(obj));
+      }
+   }
+#endif
+}
+
+
+/**
+ * A debug function that may be called from other parts of Mesa as
+ * needed during debugging.
+ */
+void
+vbo_check_buffers_are_unmapped(struct gl_context *ctx)
+{
+   struct vbo_context *vbo = vbo_context(ctx);
+   struct vbo_exec_context *exec = &vbo->exec;
+   /* check the current vertex arrays */
+   check_buffers_are_unmapped(exec->array.inputs);
+   /* check the current glBegin/glVertex/glEnd-style VBO */
+   assert(!_mesa_bufferobj_mapped(exec->vtx.bufferobj));
+}
+
+
+
+/**
+ * Compute min and max elements by scanning the index buffer for
+ * glDraw[Range]Elements() calls.
+ * If primitive restart is enabled, we need to ignore restart
+ * indexes when computing min/max.
+ */
+void
+vbo_get_minmax_index(struct gl_context *ctx,
+		     const struct _mesa_prim *prim,
+		     const struct _mesa_index_buffer *ib,
+		     GLuint *min_index, GLuint *max_index)
+{
+   const GLboolean restart = ctx->Array.PrimitiveRestart;
+   const GLuint restartIndex = ctx->Array.RestartIndex;
+   const GLuint count = prim->count;
+   const void *indices;
+   GLuint i;
+
+   if (_mesa_is_bufferobj(ib->obj)) {
+      const GLvoid *map =
+         ctx->Driver.MapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB,
+                               GL_READ_ONLY, ib->obj);
+      indices = ADD_POINTERS(map, ib->ptr);
+   } else {
+      indices = ib->ptr;
+   }
+
+   switch (ib->type) {
+   case GL_UNSIGNED_INT: {
+      const GLuint *ui_indices = (const GLuint *)indices;
+      GLuint max_ui = 0;
+      GLuint min_ui = ~0U;
+      if (restart) {
+         for (i = 0; i < count; i++) {
+            if (ui_indices[i] != restartIndex) {
+               if (ui_indices[i] > max_ui) max_ui = ui_indices[i];
+               if (ui_indices[i] < min_ui) min_ui = ui_indices[i];
+            }
+         }
+      }
+      else {
+         for (i = 0; i < count; i++) {
+            if (ui_indices[i] > max_ui) max_ui = ui_indices[i];
+            if (ui_indices[i] < min_ui) min_ui = ui_indices[i];
+         }
+      }
+      *min_index = min_ui;
+      *max_index = max_ui;
+      break;
+   }
+   case GL_UNSIGNED_SHORT: {
+      const GLushort *us_indices = (const GLushort *)indices;
+      GLuint max_us = 0;
+      GLuint min_us = ~0U;
+      if (restart) {
+         for (i = 0; i < count; i++) {
+            if (us_indices[i] != restartIndex) {
+               if (us_indices[i] > max_us) max_us = us_indices[i];
+               if (us_indices[i] < min_us) min_us = us_indices[i];
+            }
+         }
+      }
+      else {
+         for (i = 0; i < count; i++) {
+            if (us_indices[i] > max_us) max_us = us_indices[i];
+            if (us_indices[i] < min_us) min_us = us_indices[i];
+         }
+      }
+      *min_index = min_us;
+      *max_index = max_us;
+      break;
+   }
+   case GL_UNSIGNED_BYTE: {
+      const GLubyte *ub_indices = (const GLubyte *)indices;
+      GLuint max_ub = 0;
+      GLuint min_ub = ~0U;
+      if (restart) {
+         for (i = 0; i < count; i++) {
+            if (ub_indices[i] != restartIndex) {
+               if (ub_indices[i] > max_ub) max_ub = ub_indices[i];
+               if (ub_indices[i] < min_ub) min_ub = ub_indices[i];
+            }
+         }
+      }
+      else {
+         for (i = 0; i < count; i++) {
+            if (ub_indices[i] > max_ub) max_ub = ub_indices[i];
+            if (ub_indices[i] < min_ub) min_ub = ub_indices[i];
+         }
+      }
+      *min_index = min_ub;
+      *max_index = max_ub;
+      break;
+   }
+   default:
+      assert(0);
+      break;
+   }
+
+   if (_mesa_is_bufferobj(ib->obj)) {
+      ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB, ib->obj);
+   }
+}
+
+
+/**
+ * Check that element 'j' of the array has reasonable data.
+ * Map VBO if needed.
+ * For debugging purposes; not normally used.
+ */
+static void
+check_array_data(struct gl_context *ctx, struct gl_client_array *array,
+                 GLuint attrib, GLuint j)
+{
+   if (array->Enabled) {
+      const void *data = array->Ptr;
+      if (_mesa_is_bufferobj(array->BufferObj)) {
+         if (!array->BufferObj->Pointer) {
+            /* need to map now */
+            array->BufferObj->Pointer =
+               ctx->Driver.MapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
+                                     GL_READ_ONLY, array->BufferObj);
+         }
+         data = ADD_POINTERS(data, array->BufferObj->Pointer);
+      }
+      switch (array->Type) {
+      case GL_FLOAT:
+         {
+            GLfloat *f = (GLfloat *) ((GLubyte *) data + array->StrideB * j);
+            GLint k;
+            for (k = 0; k < array->Size; k++) {
+               if (IS_INF_OR_NAN(f[k]) ||
+                   f[k] >= 1.0e20 || f[k] <= -1.0e10) {
+                  printf("Bad array data:\n");
+                  printf("  Element[%u].%u = %f\n", j, k, f[k]);
+                  printf("  Array %u at %p\n", attrib, (void* ) array);
+                  printf("  Type 0x%x, Size %d, Stride %d\n",
+			 array->Type, array->Size, array->Stride);
+                  printf("  Address/offset %p in Buffer Object %u\n",
+			 array->Ptr, array->BufferObj->Name);
+                  f[k] = 1.0; /* XXX replace the bad value! */
+               }
+               /*assert(!IS_INF_OR_NAN(f[k]));*/
+            }
+         }
+         break;
+      default:
+         ;
+      }
+   }
+}
+
+
+/**
+ * Unmap the buffer object referenced by given array, if mapped.
+ */
+static void
+unmap_array_buffer(struct gl_context *ctx, struct gl_client_array *array)
+{
+   if (array->Enabled &&
+       _mesa_is_bufferobj(array->BufferObj) &&
+       _mesa_bufferobj_mapped(array->BufferObj)) {
+      ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB, array->BufferObj);
+   }
+}
+
+
+/**
+ * Examine the array's data for NaNs, etc.
+ * For debug purposes; not normally used.
+ */
+static void
+check_draw_elements_data(struct gl_context *ctx, GLsizei count, GLenum elemType,
+                         const void *elements, GLint basevertex)
+{
+   struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
+   const void *elemMap;
+   GLint i, k;
+
+   if (_mesa_is_bufferobj(ctx->Array.ElementArrayBufferObj)) {
+      elemMap = ctx->Driver.MapBuffer(ctx,
+                                      GL_ELEMENT_ARRAY_BUFFER_ARB,
+                                      GL_READ_ONLY,
+                                      ctx->Array.ElementArrayBufferObj);
+      elements = ADD_POINTERS(elements, elemMap);
+   }
+
+   for (i = 0; i < count; i++) {
+      GLuint j;
+
+      /* j = element[i] */
+      switch (elemType) {
+      case GL_UNSIGNED_BYTE:
+         j = ((const GLubyte *) elements)[i];
+         break;
+      case GL_UNSIGNED_SHORT:
+         j = ((const GLushort *) elements)[i];
+         break;
+      case GL_UNSIGNED_INT:
+         j = ((const GLuint *) elements)[i];
+         break;
+      default:
+         assert(0);
+      }
+
+      /* check element j of each enabled array */
+      check_array_data(ctx, &arrayObj->Vertex, VERT_ATTRIB_POS, j);
+      check_array_data(ctx, &arrayObj->Normal, VERT_ATTRIB_NORMAL, j);
+      check_array_data(ctx, &arrayObj->Color, VERT_ATTRIB_COLOR0, j);
+      check_array_data(ctx, &arrayObj->SecondaryColor, VERT_ATTRIB_COLOR1, j);
+      for (k = 0; k < Elements(arrayObj->TexCoord); k++) {
+         check_array_data(ctx, &arrayObj->TexCoord[k], VERT_ATTRIB_TEX0 + k, j);
+      }
+      for (k = 0; k < Elements(arrayObj->VertexAttrib); k++) {
+         check_array_data(ctx, &arrayObj->VertexAttrib[k],
+                          VERT_ATTRIB_GENERIC0 + k, j);
+      }
+   }
+
+   if (_mesa_is_bufferobj(ctx->Array.ElementArrayBufferObj)) {
+      ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB,
+			      ctx->Array.ElementArrayBufferObj);
+   }
+
+   unmap_array_buffer(ctx, &arrayObj->Vertex);
+   unmap_array_buffer(ctx, &arrayObj->Normal);
+   unmap_array_buffer(ctx, &arrayObj->Color);
+   for (k = 0; k < Elements(arrayObj->TexCoord); k++) {
+      unmap_array_buffer(ctx, &arrayObj->TexCoord[k]);
+   }
+   for (k = 0; k < Elements(arrayObj->VertexAttrib); k++) {
+      unmap_array_buffer(ctx, &arrayObj->VertexAttrib[k]);
+   }
+}
+
+
+/**
+ * Check array data, looking for NaNs, etc.
+ */
+static void
+check_draw_arrays_data(struct gl_context *ctx, GLint start, GLsizei count)
+{
+   /* TO DO */
+}
+
+
+/**
+ * Print info/data for glDrawArrays(), for debugging.
+ */
+static void
+print_draw_arrays(struct gl_context *ctx,
+                  GLenum mode, GLint start, GLsizei count)
+{
+   struct vbo_context *vbo = vbo_context(ctx);
+   struct vbo_exec_context *exec = &vbo->exec;
+   int i;
+
+   printf("vbo_exec_DrawArrays(mode 0x%x, start %d, count %d):\n",
+	  mode, start, count);
+
+   for (i = 0; i < 32; i++) {
+      GLuint bufName = exec->array.inputs[i]->BufferObj->Name;
+      GLint stride = exec->array.inputs[i]->Stride;
+      printf("attr %2d: size %d stride %d  enabled %d  "
+	     "ptr %p  Bufobj %u\n",
+	     i,
+	     exec->array.inputs[i]->Size,
+	     stride,
+	     /*exec->array.inputs[i]->Enabled,*/
+	     exec->array.legacy_array[i]->Enabled,
+	     exec->array.inputs[i]->Ptr,
+	     bufName);
+
+      if (bufName) {
+         struct gl_buffer_object *buf = _mesa_lookup_bufferobj(ctx, bufName);
+         GLubyte *p = ctx->Driver.MapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
+                                            GL_READ_ONLY_ARB, buf);
+         int offset = (int) (GLintptr) exec->array.inputs[i]->Ptr;
+         float *f = (float *) (p + offset);
+         int *k = (int *) f;
+         int i;
+         int n = (count * stride) / 4;
+         if (n > 32)
+            n = 32;
+         printf("  Data at offset %d:\n", offset);
+         for (i = 0; i < n; i++) {
+            printf("    float[%d] = 0x%08x %f\n", i, k[i], f[i]);
+         }
+         ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB, buf);
+      }
+   }
+}
+
+
+/**
+ * Bind the VBO executor to the current vertex array object prior
+ * to drawing.
+ *
+ * Just translate the arrayobj into a sane layout.
+ */
+static void
+bind_array_obj(struct gl_context *ctx)
+{
+   struct vbo_context *vbo = vbo_context(ctx);
+   struct vbo_exec_context *exec = &vbo->exec;
+   struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
+   GLuint i;
+
+   /* TODO: Fix the ArrayObj struct to keep legacy arrays in an array
+    * rather than as individual named arrays.  Then this function can
+    * go away.
+    */
+   exec->array.legacy_array[VERT_ATTRIB_POS] = &arrayObj->Vertex;
+   exec->array.legacy_array[VERT_ATTRIB_WEIGHT] = &arrayObj->Weight;
+   exec->array.legacy_array[VERT_ATTRIB_NORMAL] = &arrayObj->Normal;
+   exec->array.legacy_array[VERT_ATTRIB_COLOR0] = &arrayObj->Color;
+   exec->array.legacy_array[VERT_ATTRIB_COLOR1] = &arrayObj->SecondaryColor;
+   exec->array.legacy_array[VERT_ATTRIB_FOG] = &arrayObj->FogCoord;
+   exec->array.legacy_array[VERT_ATTRIB_COLOR_INDEX] = &arrayObj->Index;
+   if (arrayObj->PointSize.Enabled) {
+      /* this aliases COLOR_INDEX */
+      exec->array.legacy_array[VERT_ATTRIB_POINT_SIZE] = &arrayObj->PointSize;
+   }
+   exec->array.legacy_array[VERT_ATTRIB_EDGEFLAG] = &arrayObj->EdgeFlag;
+
+   for (i = 0; i < Elements(arrayObj->TexCoord); i++)
+      exec->array.legacy_array[VERT_ATTRIB_TEX0 + i] = &arrayObj->TexCoord[i];
+
+   for (i = 0; i < Elements(arrayObj->VertexAttrib); i++) {
+      assert(i < Elements(exec->array.generic_array));
+      exec->array.generic_array[i] = &arrayObj->VertexAttrib[i];
+   }
+   
+   exec->array.array_obj = arrayObj->Name;
+}
+
+
+/**
+ * Set the vbo->exec->inputs[] pointers to point to the enabled
+ * vertex arrays.  This depends on the current vertex program/shader
+ * being executed because of whether or not generic vertex arrays
+ * alias the conventional vertex arrays.
+ * For arrays that aren't enabled, we set the input[attrib] pointer
+ * to point at a zero-stride current value "array".
+ */
+static void
+recalculate_input_bindings(struct gl_context *ctx)
+{
+   struct vbo_context *vbo = vbo_context(ctx);
+   struct vbo_exec_context *exec = &vbo->exec;
+   const struct gl_client_array **inputs = &exec->array.inputs[0];
+   GLbitfield const_inputs = 0x0;
+   GLuint i;
+
+   exec->array.program_mode = get_program_mode(ctx);
+   exec->array.enabled_flags = ctx->Array.ArrayObj->_Enabled;
+
+   switch (exec->array.program_mode) {
+   case VP_NONE:
+      /* When no vertex program is active (or the vertex program is generated
+       * from fixed-function state).  We put the material values into the
+       * generic slots.  This is the only situation where material values
+       * are available as per-vertex attributes.
+       */
+      for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
+	 if (exec->array.legacy_array[i]->Enabled)
+	    inputs[i] = exec->array.legacy_array[i];
+	 else {
+	    inputs[i] = &vbo->legacy_currval[i];
+            const_inputs |= 1 << i;
+         }
+      }
+
+      for (i = 0; i < MAT_ATTRIB_MAX; i++) {
+	 inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->mat_currval[i];
+         const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
+      }
+
+      /* Could use just about anything, just to fill in the empty
+       * slots:
+       */
+      for (i = MAT_ATTRIB_MAX; i < VERT_ATTRIB_MAX - VERT_ATTRIB_GENERIC0; i++) {
+	 inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];
+         const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
+      }
+      break;
+
+   case VP_NV:
+      /* NV_vertex_program - attribute arrays alias and override
+       * conventional, legacy arrays.  No materials, and the generic
+       * slots are vacant.
+       */
+      for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
+	 if (exec->array.generic_array[i]->Enabled)
+	    inputs[i] = exec->array.generic_array[i];
+	 else if (exec->array.legacy_array[i]->Enabled)
+	    inputs[i] = exec->array.legacy_array[i];
+	 else {
+	    inputs[i] = &vbo->legacy_currval[i];
+            const_inputs |= 1 << i;
+         }
+      }
+
+      /* Could use just about anything, just to fill in the empty
+       * slots:
+       */
+      for (i = VERT_ATTRIB_GENERIC0; i < VERT_ATTRIB_MAX; i++) {
+	 inputs[i] = &vbo->generic_currval[i - VERT_ATTRIB_GENERIC0];
+         const_inputs |= 1 << i;
+      }
+      break;
+
+   case VP_ARB:
+      /* GL_ARB_vertex_program or GLSL vertex shader - Only the generic[0]
+       * attribute array aliases and overrides the legacy position array.  
+       *
+       * Otherwise, legacy attributes available in the legacy slots,
+       * generic attributes in the generic slots and materials are not
+       * available as per-vertex attributes.
+       */
+      if (exec->array.generic_array[0]->Enabled)
+	 inputs[0] = exec->array.generic_array[0];
+      else if (exec->array.legacy_array[0]->Enabled)
+	 inputs[0] = exec->array.legacy_array[0];
+      else {
+	 inputs[0] = &vbo->legacy_currval[0];
+         const_inputs |= 1 << 0;
+      }
+
+      for (i = 1; i <= VERT_ATTRIB_TEX7; i++) {
+	 if (exec->array.legacy_array[i]->Enabled)
+	    inputs[i] = exec->array.legacy_array[i];
+	 else {
+	    inputs[i] = &vbo->legacy_currval[i];
+            const_inputs |= 1 << i;
+         }
+      }
+
+      for (i = 0; i < MAX_VERTEX_GENERIC_ATTRIBS; i++) {
+	 if (exec->array.generic_array[i]->Enabled)
+	    inputs[VERT_ATTRIB_GENERIC0 + i] = exec->array.generic_array[i];
+	 else {
+	    inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];
+            const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
+         }
+
+      }
+      break;
+   }
+
+   _mesa_set_varying_vp_inputs( ctx, ~const_inputs );
+}
+
+
+/**
+ * Examine the enabled vertex arrays to set the exec->array.inputs[] values.
+ * These will point to the arrays to actually use for drawing.  Some will
+ * be user-provided arrays, other will be zero-stride const-valued arrays.
+ * Note that this might set the _NEW_ARRAY dirty flag so state validation
+ * must be done after this call.
+ */
+static void
+bind_arrays(struct gl_context *ctx)
+{
+   if (!ctx->Array.RebindArrays) {
+      return;
+   }
+
+   bind_array_obj(ctx);
+   recalculate_input_bindings(ctx);
+   ctx->Array.RebindArrays = GL_FALSE;
+}
+
+
+/**
+ * Helper function called by the other DrawArrays() functions below.
+ * This is where we handle primitive restart for drawing non-indexed
+ * arrays.  If primitive restart is enabled, it typically means
+ * splitting one DrawArrays() into two.
+ */
+static void
+vbo_draw_arrays(struct gl_context *ctx, GLenum mode, GLint start,
+                GLsizei count, GLuint numInstances)
+{
+   struct vbo_context *vbo = vbo_context(ctx);
+   struct vbo_exec_context *exec = &vbo->exec;
+   struct _mesa_prim prim[2];
+
+   bind_arrays(ctx);
+
+   /* Again... because we may have changed the bitmask of per-vertex varying
+    * attributes.  If we regenerate the fixed-function vertex program now
+    * we may be able to prune down the number of vertex attributes which we
+    * need in the shader.
+    */
+   if (ctx->NewState)
+      _mesa_update_state(ctx);
+
+   prim[0].begin = 1;
+   prim[0].end = 1;
+   prim[0].weak = 0;
+   prim[0].pad = 0;
+   prim[0].mode = mode;
+   prim[0].start = 0; /* filled in below */
+   prim[0].count = 0; /* filled in below */
+   prim[0].indexed = 0;
+   prim[0].basevertex = 0;
+   prim[0].num_instances = numInstances;
+
+   /* Implement the primitive restart index */
+   if (ctx->Array.PrimitiveRestart && ctx->Array.RestartIndex < count) {
+      GLuint primCount = 0;
+
+      if (ctx->Array.RestartIndex == start) {
+         /* special case: RestartIndex at beginning */
+         if (count > 1) {
+            prim[0].start = start + 1;
+            prim[0].count = count - 1;
+            primCount = 1;
+         }
+      }
+      else if (ctx->Array.RestartIndex == start + count - 1) {
+         /* special case: RestartIndex at end */
+         if (count > 1) {
+            prim[0].start = start;
+            prim[0].count = count - 1;
+            primCount = 1;
+         }
+      }
+      else {
+         /* general case: RestartIndex in middle, split into two prims */
+         prim[0].start = start;
+         prim[0].count = ctx->Array.RestartIndex - start;
+
+         prim[1] = prim[0];
+         prim[1].start = ctx->Array.RestartIndex + 1;
+         prim[1].count = count - prim[1].start;
+
+         primCount = 2;
+      }
+
+      if (primCount > 0) {
+         /* draw one or two prims */
+         check_buffers_are_unmapped(exec->array.inputs);
+         vbo->draw_prims(ctx, exec->array.inputs, prim, primCount, NULL,
+                         GL_TRUE, start, start + count - 1);
+      }
+   }
+   else {
+      /* no prim restart */
+      prim[0].start = start;
+      prim[0].count = count;
+
+      check_buffers_are_unmapped(exec->array.inputs);
+      vbo->draw_prims(ctx, exec->array.inputs, prim, 1, NULL,
+                      GL_TRUE, start, start + count - 1);
+   }
+}
+
+
+
+/**
+ * Called from glDrawArrays when in immediate mode (not display list mode).
+ */
+static void GLAPIENTRY
+vbo_exec_DrawArrays(GLenum mode, GLint start, GLsizei count)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_DRAW)
+      _mesa_debug(ctx, "glDrawArrays(%s, %d, %d)\n",
+                  _mesa_lookup_enum_by_nr(mode), start, count);
+
+   if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
+      return;
+
+   FLUSH_CURRENT( ctx, 0 );
+
+   if (!_mesa_valid_to_render(ctx, "glDrawArrays")) {
+      return;
+   }
+
+   if (0)
+      check_draw_arrays_data(ctx, start, count);
+
+   vbo_draw_arrays(ctx, mode, start, count, 1);
+
+   if (0)
+      print_draw_arrays(ctx, mode, start, count);
+}
+
+
+/**
+ * Called from glDrawArraysInstanced when in immediate mode (not
+ * display list mode).
+ */
+static void GLAPIENTRY
+vbo_exec_DrawArraysInstanced(GLenum mode, GLint start, GLsizei count,
+                             GLsizei numInstances)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_DRAW)
+      _mesa_debug(ctx, "glDrawArraysInstanced(%s, %d, %d, %d)\n",
+                  _mesa_lookup_enum_by_nr(mode), start, count, numInstances);
+
+   if (!_mesa_validate_DrawArraysInstanced(ctx, mode, start, count, numInstances))
+      return;
+
+   FLUSH_CURRENT( ctx, 0 );
+
+   if (!_mesa_valid_to_render(ctx, "glDrawArraysInstanced")) {
+      return;
+   }
+
+   if (0)
+      check_draw_arrays_data(ctx, start, count);
+
+   vbo_draw_arrays(ctx, mode, start, count, numInstances);
+
+   if (0)
+      print_draw_arrays(ctx, mode, start, count);
+}
+
+
+/**
+ * Map GL_ELEMENT_ARRAY_BUFFER and print contents.
+ * For debugging.
+ */
+static void
+dump_element_buffer(struct gl_context *ctx, GLenum type)
+{
+   const GLvoid *map = ctx->Driver.MapBuffer(ctx,
+                                             GL_ELEMENT_ARRAY_BUFFER_ARB,
+                                             GL_READ_ONLY,
+                                             ctx->Array.ElementArrayBufferObj);
+   switch (type) {
+   case GL_UNSIGNED_BYTE:
+      {
+         const GLubyte *us = (const GLubyte *) map;
+         GLint i;
+         for (i = 0; i < ctx->Array.ElementArrayBufferObj->Size; i++) {
+            printf("%02x ", us[i]);
+            if (i % 32 == 31)
+               printf("\n");
+         }
+         printf("\n");
+      }
+      break;
+   case GL_UNSIGNED_SHORT:
+      {
+         const GLushort *us = (const GLushort *) map;
+         GLint i;
+         for (i = 0; i < ctx->Array.ElementArrayBufferObj->Size / 2; i++) {
+            printf("%04x ", us[i]);
+            if (i % 16 == 15)
+               printf("\n");
+         }
+         printf("\n");
+      }
+      break;
+   case GL_UNSIGNED_INT:
+      {
+         const GLuint *us = (const GLuint *) map;
+         GLint i;
+         for (i = 0; i < ctx->Array.ElementArrayBufferObj->Size / 4; i++) {
+            printf("%08x ", us[i]);
+            if (i % 8 == 7)
+               printf("\n");
+         }
+         printf("\n");
+      }
+      break;
+   default:
+      ;
+   }
+
+   ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB,
+                           ctx->Array.ElementArrayBufferObj);
+}
+
+
+/**
+ * Inner support for both _mesa_DrawElements and _mesa_DrawRangeElements.
+ * Do the rendering for a glDrawElements or glDrawRangeElements call after
+ * we've validated buffer bounds, etc.
+ */
+static void
+vbo_validated_drawrangeelements(struct gl_context *ctx, GLenum mode,
+				GLboolean index_bounds_valid,
+				GLuint start, GLuint end,
+				GLsizei count, GLenum type,
+				const GLvoid *indices,
+				GLint basevertex, GLint numInstances)
+{
+   struct vbo_context *vbo = vbo_context(ctx);
+   struct vbo_exec_context *exec = &vbo->exec;
+   struct _mesa_index_buffer ib;
+   struct _mesa_prim prim[1];
+
+   FLUSH_CURRENT( ctx, 0 );
+
+   if (!_mesa_valid_to_render(ctx, "glDraw[Range]Elements")) {
+      return;
+   }
+
+   bind_arrays( ctx );
+
+   /* check for dirty state again */
+   if (ctx->NewState)
+      _mesa_update_state( ctx );
+
+   ib.count = count;
+   ib.type = type;
+   ib.obj = ctx->Array.ElementArrayBufferObj;
+   ib.ptr = indices;
+
+   prim[0].begin = 1;
+   prim[0].end = 1;
+   prim[0].weak = 0;
+   prim[0].pad = 0;
+   prim[0].mode = mode;
+   prim[0].start = 0;
+   prim[0].count = count;
+   prim[0].indexed = 1;
+   prim[0].basevertex = basevertex;
+   prim[0].num_instances = numInstances;
+
+   /* Need to give special consideration to rendering a range of
+    * indices starting somewhere above zero.  Typically the
+    * application is issuing multiple DrawRangeElements() to draw
+    * successive primitives layed out linearly in the vertex arrays.
+    * Unless the vertex arrays are all in a VBO (or locked as with
+    * CVA), the OpenGL semantics imply that we need to re-read or
+    * re-upload the vertex data on each draw call.  
+    *
+    * In the case of hardware tnl, we want to avoid starting the
+    * upload at zero, as it will mean every draw call uploads an
+    * increasing amount of not-used vertex data.  Worse - in the
+    * software tnl module, all those vertices might be transformed and
+    * lit but never rendered.
+    *
+    * If we just upload or transform the vertices in start..end,
+    * however, the indices will be incorrect.
+    *
+    * At this level, we don't know exactly what the requirements of
+    * the backend are going to be, though it will likely boil down to
+    * either:
+    *
+    * 1) Do nothing, everything is in a VBO and is processed once
+    *       only.
+    *
+    * 2) Adjust the indices and vertex arrays so that start becomes
+    *    zero.
+    *
+    * Rather than doing anything here, I'll provide a helper function
+    * for the latter case elsewhere.
+    */
+
+   check_buffers_are_unmapped(exec->array.inputs);
+   vbo->draw_prims( ctx, exec->array.inputs, prim, 1, &ib,
+		    index_bounds_valid, start, end );
+}
+
+
+/**
+ * Called by glDrawRangeElementsBaseVertex() in immediate mode.
+ */
+static void GLAPIENTRY
+vbo_exec_DrawRangeElementsBaseVertex(GLenum mode,
+				     GLuint start, GLuint end,
+				     GLsizei count, GLenum type,
+				     const GLvoid *indices,
+				     GLint basevertex)
+{
+   static GLuint warnCount = 0;
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_DRAW)
+      _mesa_debug(ctx,
+                "glDrawRangeElementsBaseVertex(%s, %u, %u, %d, %s, %p, %d)\n",
+                _mesa_lookup_enum_by_nr(mode), start, end, count,
+                _mesa_lookup_enum_by_nr(type), indices, basevertex);
+
+   if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count,
+                                          type, indices, basevertex ))
+      return;
+
+   /* NOTE: It's important that 'end' is a reasonable value.
+    * in _tnl_draw_prims(), we use end to determine how many vertices
+    * to transform.  If it's too large, we can unnecessarily split prims
+    * or we can read/write out of memory in several different places!
+    */
+
+   /* Catch/fix some potential user errors */
+   if (type == GL_UNSIGNED_BYTE) {
+      start = MIN2(start, 0xff);
+      end = MIN2(end, 0xff);
+   }
+   else if (type == GL_UNSIGNED_SHORT) {
+      start = MIN2(start, 0xffff);
+      end = MIN2(end, 0xffff);
+   }
+
+   if (end >= ctx->Array.ArrayObj->_MaxElement) {
+      /* the max element is out of bounds of one or more enabled arrays */
+      warnCount++;
+
+      if (warnCount < 10) {
+         _mesa_warning(ctx, "glDraw[Range]Elements(start %u, end %u, count %d, "
+                       "type 0x%x, indices=%p)\n"
+                       "\tend is out of bounds (max=%u)  "
+                       "Element Buffer %u (size %d)\n"
+                       "\tThis should probably be fixed in the application.",
+                       start, end, count, type, indices,
+                       ctx->Array.ArrayObj->_MaxElement - 1,
+                       ctx->Array.ElementArrayBufferObj->Name,
+                       (int) ctx->Array.ElementArrayBufferObj->Size);
+      }
+
+      if (0)
+         dump_element_buffer(ctx, type);
+
+      if (0)
+         _mesa_print_arrays(ctx);
+
+#ifdef DEBUG
+      /* 'end' was out of bounds, but now let's check the actual array
+       * indexes to see if any of them are out of bounds.
+       */
+      {
+         GLuint max = _mesa_max_buffer_index(ctx, count, type, indices,
+                                             ctx->Array.ElementArrayBufferObj);
+         if (max >= ctx->Array.ArrayObj->_MaxElement) {
+            if (warnCount < 10) {
+               _mesa_warning(ctx, "glDraw[Range]Elements(start %u, end %u, "
+                             "count %d, type 0x%x, indices=%p)\n"
+                             "\tindex=%u is out of bounds (max=%u)  "
+                             "Element Buffer %u (size %d)\n"
+                             "\tSkipping the glDrawRangeElements() call",
+                             start, end, count, type, indices, max,
+                             ctx->Array.ArrayObj->_MaxElement - 1,
+                             ctx->Array.ElementArrayBufferObj->Name,
+                             (int) ctx->Array.ElementArrayBufferObj->Size);
+            }
+         }
+         /* XXX we could also find the min index and compare to 'start'
+          * to see if start is correct.  But it's more likely to get the
+          * upper bound wrong.
+          */
+      }
+#endif
+
+      /* Set 'end' to the max possible legal value */
+      assert(ctx->Array.ArrayObj->_MaxElement >= 1);
+      end = ctx->Array.ArrayObj->_MaxElement - 1;
+   }
+   else if (0) {
+      printf("glDraw[Range]Elements{,BaseVertex}"
+	     "(start %u, end %u, type 0x%x, count %d) ElemBuf %u, "
+	     "base %d\n",
+	     start, end, type, count,
+	     ctx->Array.ElementArrayBufferObj->Name,
+	     basevertex);
+   }
+
+#if 0
+   check_draw_elements_data(ctx, count, type, indices);
+#else
+   (void) check_draw_elements_data;
+#endif
+
+   vbo_validated_drawrangeelements(ctx, mode, GL_TRUE, start, end,
+				   count, type, indices, basevertex, 1);
+}
+
+
+/**
+ * Called by glDrawRangeElements() in immediate mode.
+ */
+static void GLAPIENTRY
+vbo_exec_DrawRangeElements(GLenum mode, GLuint start, GLuint end,
+                           GLsizei count, GLenum type, const GLvoid *indices)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_DRAW)
+      _mesa_debug(ctx,
+                  "glDrawRangeElements(%s, %u, %u, %d, %s, %p)\n",
+                  _mesa_lookup_enum_by_nr(mode), start, end, count,
+                  _mesa_lookup_enum_by_nr(type), indices);
+
+   vbo_exec_DrawRangeElementsBaseVertex(mode, start, end, count, type,
+					indices, 0);
+}
+
+
+/**
+ * Called by glDrawElements() in immediate mode.
+ */
+static void GLAPIENTRY
+vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type,
+                      const GLvoid *indices)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_DRAW)
+      _mesa_debug(ctx, "glDrawElements(%s, %u, %s, %p)\n",
+                  _mesa_lookup_enum_by_nr(mode), count,
+                  _mesa_lookup_enum_by_nr(type), indices);
+
+   if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices, 0 ))
+      return;
+
+   vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, ~0, ~0,
+				   count, type, indices, 0, 1);
+}
+
+
+/**
+ * Called by glDrawElementsBaseVertex() in immediate mode.
+ */
+static void GLAPIENTRY
+vbo_exec_DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type,
+				const GLvoid *indices, GLint basevertex)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_DRAW)
+      _mesa_debug(ctx, "glDrawElementsBaseVertex(%s, %d, %s, %p, %d)\n",
+                  _mesa_lookup_enum_by_nr(mode), count,
+                  _mesa_lookup_enum_by_nr(type), indices, basevertex);
+
+   if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices,
+				     basevertex ))
+      return;
+
+   vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, ~0, ~0,
+				   count, type, indices, basevertex, 1);
+}
+
+
+/**
+ * Called by glDrawElementsInstanced() in immediate mode.
+ */
+static void GLAPIENTRY
+vbo_exec_DrawElementsInstanced(GLenum mode, GLsizei count, GLenum type,
+                               const GLvoid *indices, GLsizei numInstances)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_DRAW)
+      _mesa_debug(ctx, "glDrawElementsInstanced(%s, %d, %s, %p, %d)\n",
+                  _mesa_lookup_enum_by_nr(mode), count,
+                  _mesa_lookup_enum_by_nr(type), indices, numInstances);
+
+   if (!_mesa_validate_DrawElementsInstanced(ctx, mode, count, type, indices,
+                                             numInstances))
+      return;
+
+   vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, ~0, ~0,
+				   count, type, indices, 0, numInstances);
+}
+
+
+/**
+ * Inner support for both _mesa_MultiDrawElements() and
+ * _mesa_MultiDrawRangeElements().
+ * This does the actual rendering after we've checked array indexes, etc.
+ */
+static void
+vbo_validated_multidrawelements(struct gl_context *ctx, GLenum mode,
+				const GLsizei *count, GLenum type,
+				const GLvoid **indices, GLsizei primcount,
+				const GLint *basevertex)
+{
+   struct vbo_context *vbo = vbo_context(ctx);
+   struct vbo_exec_context *exec = &vbo->exec;
+   struct _mesa_index_buffer ib;
+   struct _mesa_prim *prim;
+   unsigned int index_type_size = 0;
+   uintptr_t min_index_ptr, max_index_ptr;
+   GLboolean fallback = GL_FALSE;
+   int i;
+
+   if (primcount == 0)
+      return;
+
+   FLUSH_CURRENT( ctx, 0 );
+
+   if (!_mesa_valid_to_render(ctx, "glMultiDrawElements")) {
+      return;
+   }
+
+   prim = calloc(1, primcount * sizeof(*prim));
+   if (prim == NULL) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMultiDrawElements");
+      return;
+   }
+
+   /* Decide if we can do this all as one set of primitives sharing the
+    * same index buffer, or if we have to reset the index pointer per
+    * primitive.
+    */
+   bind_arrays( ctx );
+
+   /* check for dirty state again */
+   if (ctx->NewState)
+      _mesa_update_state( ctx );
+
+   switch (type) {
+   case GL_UNSIGNED_INT:
+      index_type_size = 4;
+      break;
+   case GL_UNSIGNED_SHORT:
+      index_type_size = 2;
+      break;
+   case GL_UNSIGNED_BYTE:
+      index_type_size = 1;
+      break;
+   default:
+      assert(0);
+   }
+
+   min_index_ptr = (uintptr_t)indices[0];
+   max_index_ptr = 0;
+   for (i = 0; i < primcount; i++) {
+      min_index_ptr = MIN2(min_index_ptr, (uintptr_t)indices[i]);
+      max_index_ptr = MAX2(max_index_ptr, (uintptr_t)indices[i] +
+			   index_type_size * count[i]);
+   }
+
+   /* Check if we can handle this thing as a bunch of index offsets from the
+    * same index pointer.  If we can't, then we have to fall back to doing
+    * a draw_prims per primitive.
+    * Check that the difference between each prim's indexes is a multiple of
+    * the index/element size.
+    */
+   if (index_type_size != 1) {
+      for (i = 0; i < primcount; i++) {
+	 if ((((uintptr_t)indices[i] - min_index_ptr) % index_type_size) != 0) {
+	    fallback = GL_TRUE;
+	    break;
+	 }
+      }
+   }
+
+   /* If the index buffer isn't in a VBO, then treating the application's
+    * subranges of the index buffer as one large index buffer may lead to
+    * us reading unmapped memory.
+    */
+   if (!_mesa_is_bufferobj(ctx->Array.ElementArrayBufferObj))
+      fallback = GL_TRUE;
+
+   if (!fallback) {
+      ib.count = (max_index_ptr - min_index_ptr) / index_type_size;
+      ib.type = type;
+      ib.obj = ctx->Array.ElementArrayBufferObj;
+      ib.ptr = (void *)min_index_ptr;
+
+      for (i = 0; i < primcount; i++) {
+	 prim[i].begin = (i == 0);
+	 prim[i].end = (i == primcount - 1);
+	 prim[i].weak = 0;
+	 prim[i].pad = 0;
+	 prim[i].mode = mode;
+	 prim[i].start = ((uintptr_t)indices[i] - min_index_ptr) / index_type_size;
+	 prim[i].count = count[i];
+	 prim[i].indexed = 1;
+         prim[i].num_instances = 1;
+	 if (basevertex != NULL)
+	    prim[i].basevertex = basevertex[i];
+	 else
+	    prim[i].basevertex = 0;
+      }
+
+      check_buffers_are_unmapped(exec->array.inputs);
+      vbo->draw_prims(ctx, exec->array.inputs, prim, primcount, &ib,
+		      GL_FALSE, ~0, ~0);
+   } else {
+      /* render one prim at a time */
+      for (i = 0; i < primcount; i++) {
+	 ib.count = count[i];
+	 ib.type = type;
+	 ib.obj = ctx->Array.ElementArrayBufferObj;
+	 ib.ptr = indices[i];
+
+	 prim[0].begin = 1;
+	 prim[0].end = 1;
+	 prim[0].weak = 0;
+	 prim[0].pad = 0;
+	 prim[0].mode = mode;
+	 prim[0].start = 0;
+	 prim[0].count = count[i];
+	 prim[0].indexed = 1;
+         prim[0].num_instances = 1;
+	 if (basevertex != NULL)
+	    prim[0].basevertex = basevertex[i];
+	 else
+	    prim[0].basevertex = 0;
+
+         check_buffers_are_unmapped(exec->array.inputs);
+         vbo->draw_prims(ctx, exec->array.inputs, prim, 1, &ib,
+                         GL_FALSE, ~0, ~0);
+      }
+   }
+
+   free(prim);
+}
+
+
+static void GLAPIENTRY
+vbo_exec_MultiDrawElements(GLenum mode,
+			   const GLsizei *count, GLenum type,
+			   const GLvoid **indices,
+			   GLsizei primcount)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint i;
+
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   for (i = 0; i < primcount; i++) {
+      if (!_mesa_validate_DrawElements(ctx, mode, count[i], type, indices[i],
+				       0))
+	 return;
+   }
+
+   vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount,
+				   NULL);
+}
+
+
+static void GLAPIENTRY
+vbo_exec_MultiDrawElementsBaseVertex(GLenum mode,
+				     const GLsizei *count, GLenum type,
+				     const GLvoid **indices,
+				     GLsizei primcount,
+				     const GLsizei *basevertex)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint i;
+
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   for (i = 0; i < primcount; i++) {
+      if (!_mesa_validate_DrawElements(ctx, mode, count[i], type, indices[i],
+				       basevertex[i]))
+	 return;
+   }
+
+   vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount,
+				   basevertex);
+}
+
+
+/**
+ * Plug in the immediate-mode vertex array drawing commands into the
+ * givven vbo_exec_context object.
+ */
+void
+vbo_exec_array_init( struct vbo_exec_context *exec )
+{
+   exec->vtxfmt.DrawArrays = vbo_exec_DrawArrays;
+   exec->vtxfmt.DrawElements = vbo_exec_DrawElements;
+   exec->vtxfmt.DrawRangeElements = vbo_exec_DrawRangeElements;
+   exec->vtxfmt.MultiDrawElementsEXT = vbo_exec_MultiDrawElements;
+   exec->vtxfmt.DrawElementsBaseVertex = vbo_exec_DrawElementsBaseVertex;
+   exec->vtxfmt.DrawRangeElementsBaseVertex = vbo_exec_DrawRangeElementsBaseVertex;
+   exec->vtxfmt.MultiDrawElementsBaseVertex = vbo_exec_MultiDrawElementsBaseVertex;
+   exec->vtxfmt.DrawArraysInstanced = vbo_exec_DrawArraysInstanced;
+   exec->vtxfmt.DrawElementsInstanced = vbo_exec_DrawElementsInstanced;
+}
+
+
+void
+vbo_exec_array_destroy( struct vbo_exec_context *exec )
+{
+   /* nothing to do */
+}
+
+
+
+/**
+ * The following functions are only used for OpenGL ES 1/2 support.
+ * And some aren't even supported (yet) in ES 1/2.
+ */
+
+
+void GLAPIENTRY
+_mesa_DrawArrays(GLenum mode, GLint first, GLsizei count)
+{
+   vbo_exec_DrawArrays(mode, first, count);
+}
+
+
+void GLAPIENTRY
+_mesa_DrawElements(GLenum mode, GLsizei count, GLenum type,
+                   const GLvoid *indices)
+{
+   vbo_exec_DrawElements(mode, count, type, indices);
+}
+
+
+void GLAPIENTRY
+_mesa_DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type,
+			     const GLvoid *indices, GLint basevertex)
+{
+   vbo_exec_DrawElementsBaseVertex(mode, count, type, indices, basevertex);
+}
+
+
+void GLAPIENTRY
+_mesa_DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count,
+                        GLenum type, const GLvoid *indices)
+{
+   vbo_exec_DrawRangeElements(mode, start, end, count, type, indices);
+}
+
+
+void GLAPIENTRY
+_mesa_DrawRangeElementsBaseVertex(GLenum mode, GLuint start, GLuint end,
+				  GLsizei count, GLenum type,
+				  const GLvoid *indices, GLint basevertex)
+{
+   vbo_exec_DrawRangeElementsBaseVertex(mode, start, end, count, type,
+					indices, basevertex);
+}
+
+
+void GLAPIENTRY
+_mesa_MultiDrawElementsEXT(GLenum mode, const GLsizei *count, GLenum type,
+			   const GLvoid **indices, GLsizei primcount)
+{
+   vbo_exec_MultiDrawElements(mode, count, type, indices, primcount);
+}
+
+
+void GLAPIENTRY
+_mesa_MultiDrawElementsBaseVertex(GLenum mode,
+				  const GLsizei *count, GLenum type,
+				  const GLvoid **indices, GLsizei primcount,
+				  const GLint *basevertex)
+{
+   vbo_exec_MultiDrawElementsBaseVertex(mode, count, type, indices,
+					primcount, basevertex);
+}