xserver and mesa git update 28-12-2010

1 files changed, 1277 insertions, 1213 deletions

diff --git a/mesalib/src/mesa/vbo/vbo_exec_array.c b/mesalib/src/mesa/vbo/vbo_exec_array.c
index 1759e5788..5b3a06f3b 100644
--- a/mesalib/src/mesa/vbo/vbo_exec_array.c
+++ b/mesalib/src/mesa/vbo/vbo_exec_array.c
@@ -1,1213 +1,1277 @@
-/**************************************************************************
- * 
- * 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"
-
-
-/**
- * Compute min and max elements by scanning the index buffer for
- * glDraw[Range]Elements() calls.
- */
-void
-vbo_get_minmax_index(GLcontext *ctx,
-		     const struct _mesa_prim *prim,
-		     const struct _mesa_index_buffer *ib,
-		     GLuint *min_index, GLuint *max_index)
-{
-   GLuint i;
-   GLuint count = prim->count;
-   const void *indices;
-
-   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 = ui_indices[count-1];
-      GLuint min_ui = ui_indices[0];
-      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 = us_indices[count-1];
-      GLuint min_us = us_indices[0];
-      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 = ub_indices[count-1];
-      GLuint min_ub = ub_indices[0];
-      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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *ctx, GLint start, GLsizei count)
-{
-   /* TO DO */
-}
-
-
-/**
- * Print info/data for glDrawArrays(), for debugging.
- */
-static void
-print_draw_arrays(GLcontext *ctx, struct vbo_exec_context *exec,
-                  GLenum mode, GLint start, GLsizei count)
-{
-   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(GLcontext *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(GLcontext *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(GLcontext *ctx)
-{
-   bind_array_obj(ctx);
-   recalculate_input_bindings(ctx);
-}
-
-
-
-/**
- * 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);
-   struct vbo_context *vbo = vbo_context(ctx);
-   struct vbo_exec_context *exec = &vbo->exec;
-   struct _mesa_prim prim[1];
-
-   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);
-#else
-   (void) check_draw_arrays_data;
-#endif
-
-   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 = start;
-   prim[0].count = count;
-   prim[0].indexed = 0;
-   prim[0].basevertex = 0;
-   prim[0].num_instances = 1;
-
-   vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL,
-                    GL_TRUE, start, start + count - 1 );
-
-#if 0
-   print_draw_arrays(ctx, exec, mode, start, count);
-#else
-   (void) print_draw_arrays;
-#endif
-}
-
-
-/**
- * Called from glDrawArraysInstanced when in immediate mode (not
- * display list mode).
- */
-static void GLAPIENTRY
-vbo_exec_DrawArraysInstanced(GLenum mode, GLint start, GLsizei count,
-                             GLsizei primcount)
-{
-   GET_CURRENT_CONTEXT(ctx);
-   struct vbo_context *vbo = vbo_context(ctx);
-   struct vbo_exec_context *exec = &vbo->exec;
-   struct _mesa_prim prim[1];
-
-   if (MESA_VERBOSE & VERBOSE_DRAW)
-      _mesa_debug(ctx, "glDrawArraysInstanced(%s, %d, %d, %d)\n",
-                  _mesa_lookup_enum_by_nr(mode), start, count, primcount);
-
-   if (!_mesa_validate_DrawArraysInstanced(ctx, mode, start, count, primcount))
-      return;
-
-   FLUSH_CURRENT( ctx, 0 );
-
-   if (!_mesa_valid_to_render(ctx, "glDrawArraysInstanced")) {
-      return;
-   }
-
-#if 0 /* debug */
-   check_draw_arrays_data(ctx, start, count);
-#endif
-
-   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 = start;
-   prim[0].count = count;
-   prim[0].indexed = 0;
-   prim[0].basevertex = 0;
-   prim[0].num_instances = primcount;
-
-   vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL,
-                    GL_TRUE, start, start + count - 1 );
-
-#if 0 /* debug */
-   print_draw_arrays(ctx, exec, mode, start, count);
-#endif
-}
-
-
-/**
- * Map GL_ELEMENT_ARRAY_BUFFER and print contents.
- * For debugging.
- */
-static void
-dump_element_buffer(GLcontext *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(GLcontext *ctx, GLenum mode,
-				GLboolean index_bounds_valid,
-				GLuint start, GLuint end,
-				GLsizei count, GLenum type,
-				const GLvoid *indices,
-				GLint basevertex, GLint primcount)
-{
-   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 = primcount;
-
-   /* 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.
-    */
-
-   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 primcount)
-{
-   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, primcount);
-
-   if (!_mesa_validate_DrawElementsInstanced(ctx, mode, count, type, indices,
-                                             primcount))
-      return;
-
-   vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, ~0, ~0,
-				   count, type, indices, 0, primcount);
-}
-
-
-/**
- * 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(GLcontext *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.
-    */
-   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;
-      }
-
-      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;
-
-         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"

+

+

+/**

+ * 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)

+{

+   bind_array_obj(ctx);

+   recalculate_input_bindings(ctx);

+}

+

+

+/**

+ * 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 */

+         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;

+

+      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 primcount)

+{

+   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, primcount);

+

+   if (!_mesa_validate_DrawArraysInstanced(ctx, mode, start, count, primcount))

+      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, primcount);

+

+   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 primcount)

+{

+   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 = primcount;

+

+   /* 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.

+    */

+

+   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 primcount)

+{

+   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, primcount);

+

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

+                                             primcount))

+      return;

+

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

+				   count, type, indices, 0, primcount);

+}

+

+

+/**

+ * 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;

+      }

+

+      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;

+

+         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);

+}