pixman mesa git update 16 Feb 2011

1 files changed, 749 insertions, 788 deletions

diff --git a/mesalib/src/mesa/state_tracker/st_draw.c b/mesalib/src/mesa/state_tracker/st_draw.c
index 19466ea44..830e3e3c1 100644
--- a/mesalib/src/mesa/state_tracker/st_draw.c
+++ b/mesalib/src/mesa/state_tracker/st_draw.c
@@ -1,788 +1,749 @@
-/**************************************************************************

- * 

- * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.

- * 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.

- * 

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

-

-/*

- * This file implements the st_draw_vbo() function which is called from

- * Mesa's VBO module.  All point/line/triangle rendering is done through

- * this function whether the user called glBegin/End, glDrawArrays,

- * glDrawElements, glEvalMesh, or glCalList, etc.

- *

- * We basically convert the VBO's vertex attribute/array information into

- * Gallium vertex state, bind the vertex buffer objects and call

- * pipe->draw_elements(), pipe->draw_range_elements() or pipe->draw_arrays().

- *

- * Authors:

- *   Keith Whitwell <keith@tungstengraphics.com>

- */

-

-

-#include "main/imports.h"

-#include "main/image.h"

-#include "main/macros.h"

-#include "main/mfeatures.h"

-#include "program/prog_uniform.h"

-

-#include "vbo/vbo.h"

-

-#include "st_context.h"

-#include "st_atom.h"

-#include "st_cb_bufferobjects.h"

-#include "st_draw.h"

-#include "st_program.h"

-

-#include "pipe/p_context.h"

-#include "pipe/p_defines.h"

-#include "util/u_inlines.h"

-#include "util/u_format.h"

-#include "util/u_prim.h"

-#include "util/u_draw_quad.h"

-#include "draw/draw_context.h"

-#include "cso_cache/cso_context.h"

-

-

-static GLuint double_types[4] = {

-   PIPE_FORMAT_R64_FLOAT,

-   PIPE_FORMAT_R64G64_FLOAT,

-   PIPE_FORMAT_R64G64B64_FLOAT,

-   PIPE_FORMAT_R64G64B64A64_FLOAT

-};

-

-static GLuint float_types[4] = {

-   PIPE_FORMAT_R32_FLOAT,

-   PIPE_FORMAT_R32G32_FLOAT,

-   PIPE_FORMAT_R32G32B32_FLOAT,

-   PIPE_FORMAT_R32G32B32A32_FLOAT

-};

-

-static GLuint half_float_types[4] = {

-   PIPE_FORMAT_R16_FLOAT,

-   PIPE_FORMAT_R16G16_FLOAT,

-   PIPE_FORMAT_R16G16B16_FLOAT,

-   PIPE_FORMAT_R16G16B16A16_FLOAT

-};

-

-static GLuint uint_types_norm[4] = {

-   PIPE_FORMAT_R32_UNORM,

-   PIPE_FORMAT_R32G32_UNORM,

-   PIPE_FORMAT_R32G32B32_UNORM,

-   PIPE_FORMAT_R32G32B32A32_UNORM

-};

-

-static GLuint uint_types_scale[4] = {

-   PIPE_FORMAT_R32_USCALED,

-   PIPE_FORMAT_R32G32_USCALED,

-   PIPE_FORMAT_R32G32B32_USCALED,

-   PIPE_FORMAT_R32G32B32A32_USCALED

-};

-

-static GLuint int_types_norm[4] = {

-   PIPE_FORMAT_R32_SNORM,

-   PIPE_FORMAT_R32G32_SNORM,

-   PIPE_FORMAT_R32G32B32_SNORM,

-   PIPE_FORMAT_R32G32B32A32_SNORM

-};

-

-static GLuint int_types_scale[4] = {

-   PIPE_FORMAT_R32_SSCALED,

-   PIPE_FORMAT_R32G32_SSCALED,

-   PIPE_FORMAT_R32G32B32_SSCALED,

-   PIPE_FORMAT_R32G32B32A32_SSCALED

-};

-

-static GLuint ushort_types_norm[4] = {

-   PIPE_FORMAT_R16_UNORM,

-   PIPE_FORMAT_R16G16_UNORM,

-   PIPE_FORMAT_R16G16B16_UNORM,

-   PIPE_FORMAT_R16G16B16A16_UNORM

-};

-

-static GLuint ushort_types_scale[4] = {

-   PIPE_FORMAT_R16_USCALED,

-   PIPE_FORMAT_R16G16_USCALED,

-   PIPE_FORMAT_R16G16B16_USCALED,

-   PIPE_FORMAT_R16G16B16A16_USCALED

-};

-

-static GLuint short_types_norm[4] = {

-   PIPE_FORMAT_R16_SNORM,

-   PIPE_FORMAT_R16G16_SNORM,

-   PIPE_FORMAT_R16G16B16_SNORM,

-   PIPE_FORMAT_R16G16B16A16_SNORM

-};

-

-static GLuint short_types_scale[4] = {

-   PIPE_FORMAT_R16_SSCALED,

-   PIPE_FORMAT_R16G16_SSCALED,

-   PIPE_FORMAT_R16G16B16_SSCALED,

-   PIPE_FORMAT_R16G16B16A16_SSCALED

-};

-

-static GLuint ubyte_types_norm[4] = {

-   PIPE_FORMAT_R8_UNORM,

-   PIPE_FORMAT_R8G8_UNORM,

-   PIPE_FORMAT_R8G8B8_UNORM,

-   PIPE_FORMAT_R8G8B8A8_UNORM

-};

-

-static GLuint ubyte_types_scale[4] = {

-   PIPE_FORMAT_R8_USCALED,

-   PIPE_FORMAT_R8G8_USCALED,

-   PIPE_FORMAT_R8G8B8_USCALED,

-   PIPE_FORMAT_R8G8B8A8_USCALED

-};

-

-static GLuint byte_types_norm[4] = {

-   PIPE_FORMAT_R8_SNORM,

-   PIPE_FORMAT_R8G8_SNORM,

-   PIPE_FORMAT_R8G8B8_SNORM,

-   PIPE_FORMAT_R8G8B8A8_SNORM

-};

-

-static GLuint byte_types_scale[4] = {

-   PIPE_FORMAT_R8_SSCALED,

-   PIPE_FORMAT_R8G8_SSCALED,

-   PIPE_FORMAT_R8G8B8_SSCALED,

-   PIPE_FORMAT_R8G8B8A8_SSCALED

-};

-

-static GLuint fixed_types[4] = {

-   PIPE_FORMAT_R32_FIXED,

-   PIPE_FORMAT_R32G32_FIXED,

-   PIPE_FORMAT_R32G32B32_FIXED,

-   PIPE_FORMAT_R32G32B32A32_FIXED

-};

-

-

-

-/**

- * Return a PIPE_FORMAT_x for the given GL datatype and size.

- */

-GLuint

-st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,

-                      GLboolean normalized)

-{

-   assert((type >= GL_BYTE && type <= GL_DOUBLE) ||

-          type == GL_FIXED || type == GL_HALF_FLOAT);

-   assert(size >= 1);

-   assert(size <= 4);

-   assert(format == GL_RGBA || format == GL_BGRA);

-

-   if (format == GL_BGRA) {

-      /* this is an odd-ball case */

-      assert(type == GL_UNSIGNED_BYTE);

-      assert(normalized);

-      return PIPE_FORMAT_B8G8R8A8_UNORM;

-   }

-

-   if (normalized) {

-      switch (type) {

-      case GL_DOUBLE: return double_types[size-1];

-      case GL_FLOAT: return float_types[size-1];

-      case GL_HALF_FLOAT: return half_float_types[size-1];

-      case GL_INT: return int_types_norm[size-1];

-      case GL_SHORT: return short_types_norm[size-1];

-      case GL_BYTE: return byte_types_norm[size-1];

-      case GL_UNSIGNED_INT: return uint_types_norm[size-1];

-      case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];

-      case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];

-      case GL_FIXED: return fixed_types[size-1];

-      default: assert(0); return 0;

-      }      

-   }

-   else {

-      switch (type) {

-      case GL_DOUBLE: return double_types[size-1];

-      case GL_FLOAT: return float_types[size-1];

-      case GL_HALF_FLOAT: return half_float_types[size-1];

-      case GL_INT: return int_types_scale[size-1];

-      case GL_SHORT: return short_types_scale[size-1];

-      case GL_BYTE: return byte_types_scale[size-1];

-      case GL_UNSIGNED_INT: return uint_types_scale[size-1];

-      case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];

-      case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];

-      case GL_FIXED: return fixed_types[size-1];

-      default: assert(0); return 0;

-      }      

-   }

-   return 0; /* silence compiler warning */

-}

-

-

-

-

-

-/**

- * Examine the active arrays to determine if we have interleaved

- * vertex arrays all living in one VBO, or all living in user space.

- * \param userSpace  returns whether the arrays are in user space.

- */

-static GLboolean

-is_interleaved_arrays(const struct st_vertex_program *vp,

-                      const struct st_vp_variant *vpv,

-                      const struct gl_client_array **arrays,

-                      GLboolean *userSpace)

-{

-   GLuint attr;

-   const struct gl_buffer_object *firstBufObj = NULL;

-   GLint firstStride = -1;

-   GLuint num_client_arrays = 0;

-   const GLubyte *client_addr = NULL;

-

-   for (attr = 0; attr < vpv->num_inputs; attr++) {

-      const GLuint mesaAttr = vp->index_to_input[attr];

-      const struct gl_buffer_object *bufObj = arrays[mesaAttr]->BufferObj;

-      const GLsizei stride = arrays[mesaAttr]->StrideB; /* in bytes */

-

-      if (firstStride < 0) {

-         firstStride = stride;

-      }

-      else if (firstStride != stride) {

-         return GL_FALSE;

-      }

-         

-      if (!bufObj || !bufObj->Name) {

-         num_client_arrays++;

-         /* Try to detect if the client-space arrays are

-          * "close" to each other.

-          */

-         if (!client_addr) {

-            client_addr = arrays[mesaAttr]->Ptr;

-         }

-         else if (abs(arrays[mesaAttr]->Ptr - client_addr) > firstStride) {

-            /* arrays start too far apart */

-            return GL_FALSE;

-         }

-      }

-      else if (!firstBufObj) {

-         firstBufObj = bufObj;

-      }

-      else if (bufObj != firstBufObj) {

-         return GL_FALSE;

-      }

-   }

-

-   *userSpace = (num_client_arrays == vpv->num_inputs);

-   /* debug_printf("user space: %s (%d arrays, %d inputs)\n",

-      (int)*userSpace ? "Yes" : "No", num_client_arrays, vp->num_inputs); */

-

-   return GL_TRUE;

-}

-

-

-/**

- * Compute the memory range occupied by the arrays.

- */

-static void

-get_arrays_bounds(const struct st_vertex_program *vp,

-                  const struct st_vp_variant *vpv,

-                  const struct gl_client_array **arrays,

-                  GLuint max_index,

-                  const GLubyte **low, const GLubyte **high)

-{

-   const GLubyte *low_addr = NULL;

-   const GLubyte *high_addr = NULL;

-   GLuint attr;

-

-   /* debug_printf("get_arrays_bounds: Handling %u attrs\n", vpv->num_inputs); */

-

-   for (attr = 0; attr < vpv->num_inputs; attr++) {

-      const GLuint mesaAttr = vp->index_to_input[attr];

-      const GLint stride = arrays[mesaAttr]->StrideB;

-      const GLubyte *start = arrays[mesaAttr]->Ptr;

-      const unsigned sz = (arrays[mesaAttr]->Size * 

-                           _mesa_sizeof_type(arrays[mesaAttr]->Type));

-      const GLubyte *end = start + (max_index * stride) + sz;

-

-      /* debug_printf("attr %u: stride %d size %u start %p end %p\n",

-         attr, stride, sz, start, end); */

-

-      if (attr == 0) {

-         low_addr = start;

-         high_addr = end;

-      }

-      else {

-         low_addr = MIN2(low_addr, start);

-         high_addr = MAX2(high_addr, end);

-      }

-   }

-

-   *low = low_addr;

-   *high = high_addr;

-}

-

-

-/**

- * Set up for drawing interleaved arrays that all live in one VBO

- * or all live in user space.

- * \param vbuffer  returns vertex buffer info

- * \param velements  returns vertex element info

- */

-static void

-setup_interleaved_attribs(struct gl_context *ctx,

-                          const struct st_vertex_program *vp,

-                          const struct st_vp_variant *vpv,

-                          const struct gl_client_array **arrays,

-                          GLuint max_index,

-                          GLboolean userSpace,

-                          struct pipe_vertex_buffer *vbuffer,

-                          struct pipe_vertex_element velements[])

-{

-   struct st_context *st = st_context(ctx);

-   struct pipe_context *pipe = st->pipe;

-   GLuint attr;

-   const GLubyte *offset0 = NULL;

-

-   for (attr = 0; attr < vpv->num_inputs; attr++) {

-      const GLuint mesaAttr = vp->index_to_input[attr];

-      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;

-      struct st_buffer_object *stobj = st_buffer_object(bufobj);

-      GLsizei stride = arrays[mesaAttr]->StrideB;

-

-      /*printf("stobj %u = %p\n", attr, (void*)stobj);*/

-

-      if (attr == 0) {

-         const GLubyte *low, *high;

-

-         get_arrays_bounds(vp, vpv, arrays, max_index, &low, &high);

-         /* debug_printf("buffer range: %p %p range %d max index %u\n",

-            low, high, high - low, max_index); */

-

-         offset0 = low;

-         if (userSpace) {

-            vbuffer->buffer =

-               pipe_user_buffer_create(pipe->screen, (void *) low, high - low,

-				       PIPE_BIND_VERTEX_BUFFER);

-            vbuffer->buffer_offset = 0;

-         }

-         else {

-            vbuffer->buffer = NULL;

-            pipe_resource_reference(&vbuffer->buffer, stobj->buffer);

-            vbuffer->buffer_offset = pointer_to_offset(low);

-         }

-         vbuffer->stride = stride; /* in bytes */

-         vbuffer->max_index = max_index;

-      }

-

-      /*

-      if (arrays[mesaAttr]->InstanceDivisor)

-         vbuffer[attr].max_index = arrays[mesaAttr]->_MaxElement;

-      else

-         vbuffer[attr].max_index = max_index;

-      */

-

-      velements[attr].src_offset =

-         (unsigned) (arrays[mesaAttr]->Ptr - offset0);

-      velements[attr].instance_divisor = arrays[mesaAttr]->InstanceDivisor;

-      velements[attr].vertex_buffer_index = 0;

-      velements[attr].src_format =

-         st_pipe_vertex_format(arrays[mesaAttr]->Type,

-                               arrays[mesaAttr]->Size,

-                               arrays[mesaAttr]->Format,

-                               arrays[mesaAttr]->Normalized);

-      assert(velements[attr].src_format);

-   }

-}

-

-

-/**

- * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each

- * vertex attribute.

- * \param vbuffer  returns vertex buffer info

- * \param velements  returns vertex element info

- */

-static void

-setup_non_interleaved_attribs(struct gl_context *ctx,

-                              const struct st_vertex_program *vp,

-                              const struct st_vp_variant *vpv,

-                              const struct gl_client_array **arrays,

-                              GLuint max_index,

-                              GLboolean *userSpace,

-                              struct pipe_vertex_buffer vbuffer[],

-                              struct pipe_vertex_element velements[])

-{

-   struct st_context *st = st_context(ctx);

-   struct pipe_context *pipe = st->pipe;

-   GLuint attr;

-

-   for (attr = 0; attr < vpv->num_inputs; attr++) {

-      const GLuint mesaAttr = vp->index_to_input[attr];

-      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;

-      GLsizei stride = arrays[mesaAttr]->StrideB;

-

-      *userSpace = GL_FALSE;

-

-      if (bufobj && bufobj->Name) {

-         /* Attribute data is in a VBO.

-          * Recall that for VBOs, the gl_client_array->Ptr field is

-          * really an offset from the start of the VBO, not a pointer.

-          */

-         struct st_buffer_object *stobj = st_buffer_object(bufobj);

-         assert(stobj->buffer);

-         /*printf("stobj %u = %p\n", attr, (void*) stobj);*/

-

-         vbuffer[attr].buffer = NULL;

-         pipe_resource_reference(&vbuffer[attr].buffer, stobj->buffer);

-         vbuffer[attr].buffer_offset = pointer_to_offset(arrays[mesaAttr]->Ptr);

-      }

-      else {

-         /* attribute data is in user-space memory, not a VBO */

-         uint bytes;

-         /*printf("user-space array %d stride %d\n", attr, stride);*/

-	

-         *userSpace = GL_TRUE;

-

-         /* wrap user data */

-         if (arrays[mesaAttr]->Ptr) {

-            /* user's vertex array */

-            if (arrays[mesaAttr]->StrideB) {

-               bytes = arrays[mesaAttr]->StrideB * (max_index + 1);

-            }

-            else {

-               bytes = arrays[mesaAttr]->Size

-                  * _mesa_sizeof_type(arrays[mesaAttr]->Type);

-            }

-            vbuffer[attr].buffer = 

-	       pipe_user_buffer_create(pipe->screen,

-				       (void *) arrays[mesaAttr]->Ptr, bytes,

-				       PIPE_BIND_VERTEX_BUFFER);

-         }

-         else {

-            /* no array, use ctx->Current.Attrib[] value */

-            bytes = sizeof(ctx->Current.Attrib[0]);

-            vbuffer[attr].buffer = 

-	       pipe_user_buffer_create(pipe->screen,

-				       (void *) ctx->Current.Attrib[mesaAttr],

-				       bytes,

-				       PIPE_BIND_VERTEX_BUFFER);

-            stride = 0;

-         }

-

-         vbuffer[attr].buffer_offset = 0;

-      }

-

-      assert(velements[attr].src_offset <= 2048); /* 11-bit field */

-

-      /* common-case setup */

-      vbuffer[attr].stride = stride; /* in bytes */

-      if (arrays[mesaAttr]->InstanceDivisor)

-         vbuffer[attr].max_index = arrays[mesaAttr]->_MaxElement;

-      else

-         vbuffer[attr].max_index = max_index;

-

-      velements[attr].src_offset = 0;

-      velements[attr].instance_divisor = arrays[mesaAttr]->InstanceDivisor;

-      velements[attr].vertex_buffer_index = attr;

-      velements[attr].src_format

-         = st_pipe_vertex_format(arrays[mesaAttr]->Type,

-                                 arrays[mesaAttr]->Size,

-                                 arrays[mesaAttr]->Format,

-                                 arrays[mesaAttr]->Normalized);

-      assert(velements[attr].src_format);

-   }

-}

-

-

-static void

-setup_index_buffer(struct gl_context *ctx,

-                   const struct _mesa_index_buffer *ib,

-                   struct pipe_index_buffer *ibuffer)

-{

-   struct st_context *st = st_context(ctx);

-   struct pipe_context *pipe = st->pipe;

-

-   memset(ibuffer, 0, sizeof(*ibuffer));

-   if (ib) {

-      struct gl_buffer_object *bufobj = ib->obj;

-

-      switch (ib->type) {

-      case GL_UNSIGNED_INT:

-         ibuffer->index_size = 4;

-         break;

-      case GL_UNSIGNED_SHORT:

-         ibuffer->index_size = 2;

-         break;

-      case GL_UNSIGNED_BYTE:

-         ibuffer->index_size = 1;

-         break;

-      default:

-         assert(0);

-	 return;

-      }

-

-      /* get/create the index buffer object */

-      if (bufobj && bufobj->Name) {

-         /* elements/indexes are in a real VBO */

-         struct st_buffer_object *stobj = st_buffer_object(bufobj);

-         pipe_resource_reference(&ibuffer->buffer, stobj->buffer);

-         ibuffer->offset = pointer_to_offset(ib->ptr);

-      }

-      else {

-         /* element/indicies are in user space memory */

-         ibuffer->buffer =

-            pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,

-                                    ib->count * ibuffer->index_size,

-                                    PIPE_BIND_INDEX_BUFFER);

-      }

-   }

-}

-

-/**

- * Prior to drawing, check that any uniforms referenced by the

- * current shader have been set.  If a uniform has not been set,

- * issue a warning.

- */

-static void

-check_uniforms(struct gl_context *ctx)

-{

-   struct gl_shader_program *shProg[3] = {

-      ctx->Shader.CurrentVertexProgram,

-      ctx->Shader.CurrentGeometryProgram,

-      ctx->Shader.CurrentFragmentProgram,

-   };

-   unsigned j;

-

-   for (j = 0; j < 3; j++) {

-      unsigned i;

-

-      if (shProg[j] == NULL || !shProg[j]->LinkStatus)

-	 continue;

-

-      for (i = 0; i < shProg[j]->Uniforms->NumUniforms; i++) {

-         const struct gl_uniform *u = &shProg[j]->Uniforms->Uniforms[i];

-         if (!u->Initialized) {

-            _mesa_warning(ctx,

-                          "Using shader with uninitialized uniform: %s",

-                          u->Name);

-         }

-      }

-   }

-}

-

-

-/**

- * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to

- * the corresponding Gallium type.

- */

-static unsigned

-translate_prim(const struct gl_context *ctx, unsigned prim)

-{

-   /* GL prims should match Gallium prims, spot-check a few */

-   assert(GL_POINTS == PIPE_PRIM_POINTS);

-   assert(GL_QUADS == PIPE_PRIM_QUADS);

-   assert(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);

-

-   /* Avoid quadstrips if it's easy to do so:

-    * Note: it's imporant to do the correct trimming if we change the prim type!

-    * We do that wherever this function is called.

-    */

-   if (prim == GL_QUAD_STRIP &&

-       ctx->Light.ShadeModel != GL_FLAT &&

-       ctx->Polygon.FrontMode == GL_FILL &&

-       ctx->Polygon.BackMode == GL_FILL)

-      prim = GL_TRIANGLE_STRIP;

-

-   return prim;

-}

-

-

-

-/**

- * This function gets plugged into the VBO module and is called when

- * we have something to render.

- * Basically, translate the information into the format expected by gallium.

- */

-void

-st_draw_vbo(struct gl_context *ctx,

-            const struct gl_client_array **arrays,

-            const struct _mesa_prim *prims,

-            GLuint nr_prims,

-            const struct _mesa_index_buffer *ib,

-	    GLboolean index_bounds_valid,

-            GLuint min_index,

-            GLuint max_index)

-{

-   struct st_context *st = st_context(ctx);

-   struct pipe_context *pipe = st->pipe;

-   const struct st_vertex_program *vp;

-   const struct st_vp_variant *vpv;

-   struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];

-   GLuint attr;

-   struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];

-   unsigned num_vbuffers, num_velements;

-   struct pipe_index_buffer ibuffer;

-   GLboolean userSpace = GL_FALSE;

-   GLboolean vertDataEdgeFlags;

-   struct pipe_draw_info info;

-   unsigned i;

-

-   /* Mesa core state should have been validated already */

-   assert(ctx->NewState == 0x0);

-

-   /* Gallium probably doesn't want this in some cases. */

-   if (!index_bounds_valid)

-      if (!vbo_all_varyings_in_vbos(arrays))

-	 vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);

-

-   /* sanity check for pointer arithmetic below */

-   assert(sizeof(arrays[0]->Ptr[0]) == 1);

-

-   vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj &&

-                       arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name;

-   if (vertDataEdgeFlags != st->vertdata_edgeflags) {

-      st->vertdata_edgeflags = vertDataEdgeFlags;

-      st->dirty.st |= ST_NEW_EDGEFLAGS_DATA;

-   }

-

-   st_validate_state(st);

-

-   /* must get these after state validation! */

-   vp = st->vp;

-   vpv = st->vp_variant;

-

-#if 0

-   if (MESA_VERBOSE & VERBOSE_GLSL) {

-      check_uniforms(ctx);

-   }

-#else

-   (void) check_uniforms;

-#endif

-

-   memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs);

-   /*

-    * Setup the vbuffer[] and velements[] arrays.

-    */

-   if (is_interleaved_arrays(vp, vpv, arrays, &userSpace)) {

-      /*printf("Draw interleaved\n");*/

-      setup_interleaved_attribs(ctx, vp, vpv, arrays, max_index, userSpace,

-                                vbuffer, velements);

-      num_vbuffers = 1;

-      num_velements = vpv->num_inputs;

-      if (num_velements == 0)

-         num_vbuffers = 0;

-   }

-   else {

-      /*printf("Draw non-interleaved\n");*/

-      setup_non_interleaved_attribs(ctx, vp, vpv, arrays, max_index,

-                                    &userSpace, vbuffer, velements);

-      num_vbuffers = vpv->num_inputs;

-      num_velements = vpv->num_inputs;

-   }

-

-#if 0

-   {

-      GLuint i;

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

-         printf("buffers[%d].stride = %u\n", i, vbuffer[i].stride);

-         printf("buffers[%d].max_index = %u\n", i, vbuffer[i].max_index);

-         printf("buffers[%d].buffer_offset = %u\n", i, vbuffer[i].buffer_offset);

-         printf("buffers[%d].buffer = %p\n", i, (void*) vbuffer[i].buffer);

-      }

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

-         printf("vlements[%d].vbuffer_index = %u\n", i, velements[i].vertex_buffer_index);

-         printf("vlements[%d].src_offset = %u\n", i, velements[i].src_offset);

-         printf("vlements[%d].format = %s\n", i, util_format_name(velements[i].src_format));

-      }

-   }

-#endif

-

-   pipe->set_vertex_buffers(pipe, num_vbuffers, vbuffer);

-   cso_set_vertex_elements(st->cso_context, num_velements, velements);

-

-   setup_index_buffer(ctx, ib, &ibuffer);

-   pipe->set_index_buffer(pipe, &ibuffer);

-

-   util_draw_init_info(&info);

-   if (ib) {

-      info.indexed = TRUE;

-      if (min_index != ~0 && max_index != ~0) {

-         info.min_index = min_index;

-         info.max_index = max_index;

-      }

-   }

-

-   info.primitive_restart = st->ctx->Array.PrimitiveRestart;

-   info.restart_index = st->ctx->Array.RestartIndex;

-

-   /* do actual drawing */

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

-      info.mode = translate_prim( ctx, prims[i].mode );

-      info.start = prims[i].start;

-      info.count = prims[i].count;

-      info.instance_count = prims[i].num_instances;

-      info.index_bias = prims[i].basevertex;

-      if (!ib) {

-         info.min_index = info.start;

-         info.max_index = info.start + info.count - 1;

-      }

-

-      if (u_trim_pipe_prim(info.mode, &info.count))

-         pipe->draw_vbo(pipe, &info);

-   }

-

-   pipe_resource_reference(&ibuffer.buffer, NULL);

-

-   /* unreference buffers (frees wrapped user-space buffer objects) */

-   for (attr = 0; attr < num_vbuffers; attr++) {

-      pipe_resource_reference(&vbuffer[attr].buffer, NULL);

-      assert(!vbuffer[attr].buffer);

-   }

-

-   if (userSpace) 

-   {

-      pipe->set_vertex_buffers(pipe, 0, NULL);

-   }

-}

-

-

-void st_init_draw( struct st_context *st )

-{

-   struct gl_context *ctx = st->ctx;

-

-   vbo_set_draw_func(ctx, st_draw_vbo);

-

-#if FEATURE_feedback || FEATURE_rastpos

-   st->draw = draw_create(st->pipe); /* for selection/feedback */

-

-   /* Disable draw options that might convert points/lines to tris, etc.

-    * as that would foul-up feedback/selection mode.

-    */

-   draw_wide_line_threshold(st->draw, 1000.0f);

-   draw_wide_point_threshold(st->draw, 1000.0f);

-   draw_enable_line_stipple(st->draw, FALSE);

-   draw_enable_point_sprites(st->draw, FALSE);

-#endif

-}

-

-

-void st_destroy_draw( struct st_context *st )

-{

-#if FEATURE_feedback || FEATURE_rastpos

-   draw_destroy(st->draw);

-#endif

-}

-

-

+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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.
+ * 
+ **************************************************************************/
+
+/*
+ * This file implements the st_draw_vbo() function which is called from
+ * Mesa's VBO module.  All point/line/triangle rendering is done through
+ * this function whether the user called glBegin/End, glDrawArrays,
+ * glDrawElements, glEvalMesh, or glCalList, etc.
+ *
+ * We basically convert the VBO's vertex attribute/array information into
+ * Gallium vertex state, bind the vertex buffer objects and call
+ * pipe->draw_elements(), pipe->draw_range_elements() or pipe->draw_arrays().
+ *
+ * Authors:
+ *   Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+
+#include "main/imports.h"
+#include "main/image.h"
+#include "main/macros.h"
+#include "main/mfeatures.h"
+#include "program/prog_uniform.h"
+
+#include "vbo/vbo.h"
+
+#include "st_context.h"
+#include "st_atom.h"
+#include "st_cb_bufferobjects.h"
+#include "st_draw.h"
+#include "st_program.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "util/u_inlines.h"
+#include "util/u_format.h"
+#include "util/u_prim.h"
+#include "util/u_draw_quad.h"
+#include "draw/draw_context.h"
+#include "cso_cache/cso_context.h"
+
+
+static GLuint double_types[4] = {
+   PIPE_FORMAT_R64_FLOAT,
+   PIPE_FORMAT_R64G64_FLOAT,
+   PIPE_FORMAT_R64G64B64_FLOAT,
+   PIPE_FORMAT_R64G64B64A64_FLOAT
+};
+
+static GLuint float_types[4] = {
+   PIPE_FORMAT_R32_FLOAT,
+   PIPE_FORMAT_R32G32_FLOAT,
+   PIPE_FORMAT_R32G32B32_FLOAT,
+   PIPE_FORMAT_R32G32B32A32_FLOAT
+};
+
+static GLuint half_float_types[4] = {
+   PIPE_FORMAT_R16_FLOAT,
+   PIPE_FORMAT_R16G16_FLOAT,
+   PIPE_FORMAT_R16G16B16_FLOAT,
+   PIPE_FORMAT_R16G16B16A16_FLOAT
+};
+
+static GLuint uint_types_norm[4] = {
+   PIPE_FORMAT_R32_UNORM,
+   PIPE_FORMAT_R32G32_UNORM,
+   PIPE_FORMAT_R32G32B32_UNORM,
+   PIPE_FORMAT_R32G32B32A32_UNORM
+};
+
+static GLuint uint_types_scale[4] = {
+   PIPE_FORMAT_R32_USCALED,
+   PIPE_FORMAT_R32G32_USCALED,
+   PIPE_FORMAT_R32G32B32_USCALED,
+   PIPE_FORMAT_R32G32B32A32_USCALED
+};
+
+static GLuint int_types_norm[4] = {
+   PIPE_FORMAT_R32_SNORM,
+   PIPE_FORMAT_R32G32_SNORM,
+   PIPE_FORMAT_R32G32B32_SNORM,
+   PIPE_FORMAT_R32G32B32A32_SNORM
+};
+
+static GLuint int_types_scale[4] = {
+   PIPE_FORMAT_R32_SSCALED,
+   PIPE_FORMAT_R32G32_SSCALED,
+   PIPE_FORMAT_R32G32B32_SSCALED,
+   PIPE_FORMAT_R32G32B32A32_SSCALED
+};
+
+static GLuint ushort_types_norm[4] = {
+   PIPE_FORMAT_R16_UNORM,
+   PIPE_FORMAT_R16G16_UNORM,
+   PIPE_FORMAT_R16G16B16_UNORM,
+   PIPE_FORMAT_R16G16B16A16_UNORM
+};
+
+static GLuint ushort_types_scale[4] = {
+   PIPE_FORMAT_R16_USCALED,
+   PIPE_FORMAT_R16G16_USCALED,
+   PIPE_FORMAT_R16G16B16_USCALED,
+   PIPE_FORMAT_R16G16B16A16_USCALED
+};
+
+static GLuint short_types_norm[4] = {
+   PIPE_FORMAT_R16_SNORM,
+   PIPE_FORMAT_R16G16_SNORM,
+   PIPE_FORMAT_R16G16B16_SNORM,
+   PIPE_FORMAT_R16G16B16A16_SNORM
+};
+
+static GLuint short_types_scale[4] = {
+   PIPE_FORMAT_R16_SSCALED,
+   PIPE_FORMAT_R16G16_SSCALED,
+   PIPE_FORMAT_R16G16B16_SSCALED,
+   PIPE_FORMAT_R16G16B16A16_SSCALED
+};
+
+static GLuint ubyte_types_norm[4] = {
+   PIPE_FORMAT_R8_UNORM,
+   PIPE_FORMAT_R8G8_UNORM,
+   PIPE_FORMAT_R8G8B8_UNORM,
+   PIPE_FORMAT_R8G8B8A8_UNORM
+};
+
+static GLuint ubyte_types_scale[4] = {
+   PIPE_FORMAT_R8_USCALED,
+   PIPE_FORMAT_R8G8_USCALED,
+   PIPE_FORMAT_R8G8B8_USCALED,
+   PIPE_FORMAT_R8G8B8A8_USCALED
+};
+
+static GLuint byte_types_norm[4] = {
+   PIPE_FORMAT_R8_SNORM,
+   PIPE_FORMAT_R8G8_SNORM,
+   PIPE_FORMAT_R8G8B8_SNORM,
+   PIPE_FORMAT_R8G8B8A8_SNORM
+};
+
+static GLuint byte_types_scale[4] = {
+   PIPE_FORMAT_R8_SSCALED,
+   PIPE_FORMAT_R8G8_SSCALED,
+   PIPE_FORMAT_R8G8B8_SSCALED,
+   PIPE_FORMAT_R8G8B8A8_SSCALED
+};
+
+static GLuint fixed_types[4] = {
+   PIPE_FORMAT_R32_FIXED,
+   PIPE_FORMAT_R32G32_FIXED,
+   PIPE_FORMAT_R32G32B32_FIXED,
+   PIPE_FORMAT_R32G32B32A32_FIXED
+};
+
+
+
+/**
+ * Return a PIPE_FORMAT_x for the given GL datatype and size.
+ */
+GLuint
+st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
+                      GLboolean normalized)
+{
+   assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
+          type == GL_FIXED || type == GL_HALF_FLOAT);
+   assert(size >= 1);
+   assert(size <= 4);
+   assert(format == GL_RGBA || format == GL_BGRA);
+
+   if (format == GL_BGRA) {
+      /* this is an odd-ball case */
+      assert(type == GL_UNSIGNED_BYTE);
+      assert(normalized);
+      return PIPE_FORMAT_B8G8R8A8_UNORM;
+   }
+
+   if (normalized) {
+      switch (type) {
+      case GL_DOUBLE: return double_types[size-1];
+      case GL_FLOAT: return float_types[size-1];
+      case GL_HALF_FLOAT: return half_float_types[size-1];
+      case GL_INT: return int_types_norm[size-1];
+      case GL_SHORT: return short_types_norm[size-1];
+      case GL_BYTE: return byte_types_norm[size-1];
+      case GL_UNSIGNED_INT: return uint_types_norm[size-1];
+      case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
+      case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
+      case GL_FIXED: return fixed_types[size-1];
+      default: assert(0); return 0;
+      }      
+   }
+   else {
+      switch (type) {
+      case GL_DOUBLE: return double_types[size-1];
+      case GL_FLOAT: return float_types[size-1];
+      case GL_HALF_FLOAT: return half_float_types[size-1];
+      case GL_INT: return int_types_scale[size-1];
+      case GL_SHORT: return short_types_scale[size-1];
+      case GL_BYTE: return byte_types_scale[size-1];
+      case GL_UNSIGNED_INT: return uint_types_scale[size-1];
+      case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
+      case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
+      case GL_FIXED: return fixed_types[size-1];
+      default: assert(0); return 0;
+      }      
+   }
+   return 0; /* silence compiler warning */
+}
+
+
+
+
+
+/**
+ * Examine the active arrays to determine if we have interleaved
+ * vertex arrays all living in one VBO, or all living in user space.
+ * \param userSpace  returns whether the arrays are in user space.
+ */
+static GLboolean
+is_interleaved_arrays(const struct st_vertex_program *vp,
+                      const struct st_vp_variant *vpv,
+                      const struct gl_client_array **arrays)
+{
+   GLuint attr;
+   const struct gl_buffer_object *firstBufObj = NULL;
+   GLint firstStride = -1;
+   const GLubyte *client_addr = NULL;
+
+   for (attr = 0; attr < vpv->num_inputs; attr++) {
+      const GLuint mesaAttr = vp->index_to_input[attr];
+      const struct gl_buffer_object *bufObj = arrays[mesaAttr]->BufferObj;
+      const GLsizei stride = arrays[mesaAttr]->StrideB; /* in bytes */
+
+      if (firstStride < 0) {
+         firstStride = stride;
+      }
+      else if (firstStride != stride) {
+         return GL_FALSE;
+      }
+
+      if (!bufObj || !bufObj->Name) {
+         /* Try to detect if the client-space arrays are
+          * "close" to each other.
+          */
+         if (!client_addr) {
+            client_addr = arrays[mesaAttr]->Ptr;
+         }
+         else if (abs(arrays[mesaAttr]->Ptr - client_addr) > firstStride) {
+            /* arrays start too far apart */
+            return GL_FALSE;
+         }
+      }
+      else if (!firstBufObj) {
+         firstBufObj = bufObj;
+      }
+      else if (bufObj != firstBufObj) {
+         return GL_FALSE;
+      }
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Set up for drawing interleaved arrays that all live in one VBO
+ * or all live in user space.
+ * \param vbuffer  returns vertex buffer info
+ * \param velements  returns vertex element info
+ */
+static void
+setup_interleaved_attribs(struct gl_context *ctx,
+                          const struct st_vertex_program *vp,
+                          const struct st_vp_variant *vpv,
+                          const struct gl_client_array **arrays,
+                          struct pipe_vertex_buffer *vbuffer,
+                          struct pipe_vertex_element velements[],
+                          unsigned max_index)
+{
+   struct st_context *st = st_context(ctx);
+   struct pipe_context *pipe = st->pipe;
+   GLuint attr;
+   const GLubyte *low_addr = NULL;
+
+   /* Find the lowest address. */
+   for (attr = 0; attr < vpv->num_inputs; attr++) {
+      const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
+
+      low_addr = !low_addr ? start : MIN2(low_addr, start);
+   }
+
+   for (attr = 0; attr < vpv->num_inputs; attr++) {
+      const GLuint mesaAttr = vp->index_to_input[attr];
+      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
+      struct st_buffer_object *stobj = st_buffer_object(bufobj);
+      GLsizei stride = arrays[mesaAttr]->StrideB;
+
+      if (attr == 0) {
+         if (bufobj && bufobj->Name) {
+            vbuffer->buffer = NULL;
+            pipe_resource_reference(&vbuffer->buffer, stobj->buffer);
+            vbuffer->buffer_offset = pointer_to_offset(low_addr);
+         } else {
+            vbuffer->buffer =
+               pipe_user_buffer_create(pipe->screen, (void*)low_addr,
+                                       stride * (max_index + 1),
+				       PIPE_BIND_VERTEX_BUFFER);
+            vbuffer->buffer_offset = 0;
+
+            /* Track user vertex buffers. */
+            pipe_resource_reference(&st->user_vb[0], vbuffer->buffer);
+            st->user_vb_stride[0] = stride;
+            st->num_user_vbs = 1;
+         }
+         vbuffer->stride = stride; /* in bytes */
+      }
+
+      velements[attr].src_offset =
+         (unsigned) (arrays[mesaAttr]->Ptr - low_addr);
+      velements[attr].instance_divisor = arrays[mesaAttr]->InstanceDivisor;
+      velements[attr].vertex_buffer_index = 0;
+      velements[attr].src_format =
+         st_pipe_vertex_format(arrays[mesaAttr]->Type,
+                               arrays[mesaAttr]->Size,
+                               arrays[mesaAttr]->Format,
+                               arrays[mesaAttr]->Normalized);
+      assert(velements[attr].src_format);
+   }
+}
+
+
+/**
+ * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
+ * vertex attribute.
+ * \param vbuffer  returns vertex buffer info
+ * \param velements  returns vertex element info
+ */
+static void
+setup_non_interleaved_attribs(struct gl_context *ctx,
+                              const struct st_vertex_program *vp,
+                              const struct st_vp_variant *vpv,
+                              const struct gl_client_array **arrays,
+                              struct pipe_vertex_buffer vbuffer[],
+                              struct pipe_vertex_element velements[],
+                              unsigned max_index)
+{
+   struct st_context *st = st_context(ctx);
+   struct pipe_context *pipe = st->pipe;
+   GLuint attr;
+
+   for (attr = 0; attr < vpv->num_inputs; attr++) {
+      const GLuint mesaAttr = vp->index_to_input[attr];
+      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
+      GLsizei stride = arrays[mesaAttr]->StrideB;
+
+      if (bufobj && bufobj->Name) {
+         /* Attribute data is in a VBO.
+          * Recall that for VBOs, the gl_client_array->Ptr field is
+          * really an offset from the start of the VBO, not a pointer.
+          */
+         struct st_buffer_object *stobj = st_buffer_object(bufobj);
+         assert(stobj->buffer);
+
+         vbuffer[attr].buffer = NULL;
+         pipe_resource_reference(&vbuffer[attr].buffer, stobj->buffer);
+         vbuffer[attr].buffer_offset = pointer_to_offset(arrays[mesaAttr]->Ptr);
+      }
+      else {
+         /* wrap user data */
+         if (arrays[mesaAttr]->Ptr) {
+            vbuffer[attr].buffer = 
+	       pipe_user_buffer_create(pipe->screen,
+				       (void *) arrays[mesaAttr]->Ptr,
+				       stride * (max_index + 1),
+				       PIPE_BIND_VERTEX_BUFFER);
+         }
+         else {
+            /* no array, use ctx->Current.Attrib[] value */
+            uint bytes = sizeof(ctx->Current.Attrib[0]);
+            vbuffer[attr].buffer = 
+	       pipe_user_buffer_create(pipe->screen,
+				       (void *) ctx->Current.Attrib[mesaAttr],
+				       bytes,
+				       PIPE_BIND_VERTEX_BUFFER);
+            stride = 0;
+         }
+
+         vbuffer[attr].buffer_offset = 0;
+
+         /* Track user vertex buffers. */
+         pipe_resource_reference(&st->user_vb[attr], vbuffer->buffer);
+         st->user_vb_stride[attr] = stride;
+         st->num_user_vbs = MAX2(st->num_user_vbs, attr+1);
+      }
+
+      /* common-case setup */
+      vbuffer[attr].stride = stride; /* in bytes */
+
+      velements[attr].src_offset = 0;
+      velements[attr].instance_divisor = arrays[mesaAttr]->InstanceDivisor;
+      velements[attr].vertex_buffer_index = attr;
+      velements[attr].src_format
+         = st_pipe_vertex_format(arrays[mesaAttr]->Type,
+                                 arrays[mesaAttr]->Size,
+                                 arrays[mesaAttr]->Format,
+                                 arrays[mesaAttr]->Normalized);
+      assert(velements[attr].src_format);
+   }
+}
+
+
+static void
+setup_index_buffer(struct gl_context *ctx,
+                   const struct _mesa_index_buffer *ib,
+                   struct pipe_index_buffer *ibuffer)
+{
+   struct st_context *st = st_context(ctx);
+   struct pipe_context *pipe = st->pipe;
+
+   memset(ibuffer, 0, sizeof(*ibuffer));
+   if (ib) {
+      struct gl_buffer_object *bufobj = ib->obj;
+
+      switch (ib->type) {
+      case GL_UNSIGNED_INT:
+         ibuffer->index_size = 4;
+         break;
+      case GL_UNSIGNED_SHORT:
+         ibuffer->index_size = 2;
+         break;
+      case GL_UNSIGNED_BYTE:
+         ibuffer->index_size = 1;
+         break;
+      default:
+         assert(0);
+	 return;
+      }
+
+      /* get/create the index buffer object */
+      if (bufobj && bufobj->Name) {
+         /* elements/indexes are in a real VBO */
+         struct st_buffer_object *stobj = st_buffer_object(bufobj);
+         pipe_resource_reference(&ibuffer->buffer, stobj->buffer);
+         ibuffer->offset = pointer_to_offset(ib->ptr);
+      }
+      else {
+         /* element/indicies are in user space memory */
+         ibuffer->buffer =
+            pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,
+                                    ib->count * ibuffer->index_size,
+                                    PIPE_BIND_INDEX_BUFFER);
+      }
+   }
+}
+
+/**
+ * Prior to drawing, check that any uniforms referenced by the
+ * current shader have been set.  If a uniform has not been set,
+ * issue a warning.
+ */
+static void
+check_uniforms(struct gl_context *ctx)
+{
+   struct gl_shader_program *shProg[3] = {
+      ctx->Shader.CurrentVertexProgram,
+      ctx->Shader.CurrentGeometryProgram,
+      ctx->Shader.CurrentFragmentProgram,
+   };
+   unsigned j;
+
+   for (j = 0; j < 3; j++) {
+      unsigned i;
+
+      if (shProg[j] == NULL || !shProg[j]->LinkStatus)
+	 continue;
+
+      for (i = 0; i < shProg[j]->Uniforms->NumUniforms; i++) {
+         const struct gl_uniform *u = &shProg[j]->Uniforms->Uniforms[i];
+         if (!u->Initialized) {
+            _mesa_warning(ctx,
+                          "Using shader with uninitialized uniform: %s",
+                          u->Name);
+         }
+      }
+   }
+}
+
+
+/**
+ * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
+ * the corresponding Gallium type.
+ */
+static unsigned
+translate_prim(const struct gl_context *ctx, unsigned prim)
+{
+   /* GL prims should match Gallium prims, spot-check a few */
+   assert(GL_POINTS == PIPE_PRIM_POINTS);
+   assert(GL_QUADS == PIPE_PRIM_QUADS);
+   assert(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
+
+   /* Avoid quadstrips if it's easy to do so:
+    * Note: it's imporant to do the correct trimming if we change the prim type!
+    * We do that wherever this function is called.
+    */
+   if (prim == GL_QUAD_STRIP &&
+       ctx->Light.ShadeModel != GL_FLAT &&
+       ctx->Polygon.FrontMode == GL_FILL &&
+       ctx->Polygon.BackMode == GL_FILL)
+      prim = GL_TRIANGLE_STRIP;
+
+   return prim;
+}
+
+
+static void
+st_validate_varrays(struct gl_context *ctx,
+                    const struct gl_client_array **arrays,
+                    unsigned max_index)
+{
+   struct st_context *st = st_context(ctx);
+   const struct st_vertex_program *vp;
+   const struct st_vp_variant *vpv;
+   struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
+   struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
+   unsigned num_vbuffers, num_velements;
+   GLuint attr;
+   unsigned i;
+
+   /* must get these after state validation! */
+   vp = st->vp;
+   vpv = st->vp_variant;
+
+   memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs);
+
+   /* Unreference any user vertex buffers. */
+   for (i = 0; i < st->num_user_vbs; i++) {
+      pipe_resource_reference(&st->user_vb[i], NULL);
+   }
+   st->num_user_vbs = 0;
+
+   /*
+    * Setup the vbuffer[] and velements[] arrays.
+    */
+   if (is_interleaved_arrays(vp, vpv, arrays)) {
+      setup_interleaved_attribs(ctx, vp, vpv, arrays, vbuffer, velements,
+                                max_index);
+      num_vbuffers = 1;
+      num_velements = vpv->num_inputs;
+      if (num_velements == 0)
+         num_vbuffers = 0;
+   }
+   else {
+      setup_non_interleaved_attribs(ctx, vp, vpv, arrays,
+                                    vbuffer, velements, max_index);
+      num_vbuffers = vpv->num_inputs;
+      num_velements = vpv->num_inputs;
+   }
+
+   cso_set_vertex_buffers(st->cso_context, num_vbuffers, vbuffer);
+   cso_set_vertex_elements(st->cso_context, num_velements, velements);
+
+   /* unreference buffers (frees wrapped user-space buffer objects)
+    * This is OK, because the pipe driver should reference buffers by itself
+    * in set_vertex_buffers. */
+   for (attr = 0; attr < num_vbuffers; attr++) {
+      pipe_resource_reference(&vbuffer[attr].buffer, NULL);
+      assert(!vbuffer[attr].buffer);
+   }
+}
+
+
+/**
+ * This function gets plugged into the VBO module and is called when
+ * we have something to render.
+ * Basically, translate the information into the format expected by gallium.
+ */
+void
+st_draw_vbo(struct gl_context *ctx,
+            const struct gl_client_array **arrays,
+            const struct _mesa_prim *prims,
+            GLuint nr_prims,
+            const struct _mesa_index_buffer *ib,
+	    GLboolean index_bounds_valid,
+            GLuint min_index,
+            GLuint max_index)
+{
+   struct st_context *st = st_context(ctx);
+   struct pipe_context *pipe = st->pipe;
+   struct pipe_index_buffer ibuffer;
+   struct pipe_draw_info info;
+   unsigned i;
+   GLboolean new_array =
+         st->dirty.st && (st->dirty.mesa & (_NEW_ARRAY | _NEW_PROGRAM)) != 0;
+
+   /* Mesa core state should have been validated already */
+   assert(ctx->NewState == 0x0);
+
+   if (ib) {
+      /* Gallium probably doesn't want this in some cases. */
+      if (!index_bounds_valid)
+         if (!vbo_all_varyings_in_vbos(arrays))
+            vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
+   } else {
+      /* Get min/max index for non-indexed drawing. */
+      min_index = ~0;
+      max_index = 0;
+
+      for (i = 0; i < nr_prims; i++) {
+         min_index = MIN2(min_index, prims[i].start);
+         max_index = MAX2(max_index, prims[i].start + prims[i].count - 1);
+      }
+   }
+
+   /* Validate state. */
+   if (st->dirty.st) {
+      GLboolean vertDataEdgeFlags;
+
+      /* sanity check for pointer arithmetic below */
+      assert(sizeof(arrays[0]->Ptr[0]) == 1);
+
+      vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj &&
+                          arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name;
+      if (vertDataEdgeFlags != st->vertdata_edgeflags) {
+         st->vertdata_edgeflags = vertDataEdgeFlags;
+         st->dirty.st |= ST_NEW_EDGEFLAGS_DATA;
+      }
+
+      st_validate_state(st);
+
+      if (new_array) {
+         st_validate_varrays(ctx, arrays, max_index);
+      }
+
+#if 0
+      if (MESA_VERBOSE & VERBOSE_GLSL) {
+         check_uniforms(ctx);
+      }
+#else
+      (void) check_uniforms;
+#endif
+   }
+
+   /* Notify the driver that the content of user buffers may have been
+    * changed. */
+   if (!new_array && st->num_user_vbs) {
+      for (i = 0; i < st->num_user_vbs; i++) {
+         if (st->user_vb[i]) {
+            unsigned stride = st->user_vb_stride[i];
+
+            if (stride) {
+               pipe->redefine_user_buffer(pipe, st->user_vb[i],
+                                          min_index * stride,
+                                          (max_index + 1 - min_index) * stride);
+            } else {
+               /* stride == 0 */
+               pipe->redefine_user_buffer(pipe, st->user_vb[i],
+                                          0, st->user_vb[i]->width0);
+            }
+         }
+      }
+   }
+
+   setup_index_buffer(ctx, ib, &ibuffer);
+   pipe->set_index_buffer(pipe, &ibuffer);
+
+   util_draw_init_info(&info);
+   if (ib) {
+      info.indexed = TRUE;
+      if (min_index != ~0 && max_index != ~0) {
+         info.min_index = min_index;
+         info.max_index = max_index;
+      }
+   }
+
+   info.primitive_restart = st->ctx->Array.PrimitiveRestart;
+   info.restart_index = st->ctx->Array.RestartIndex;
+
+   /* do actual drawing */
+   for (i = 0; i < nr_prims; i++) {
+      info.mode = translate_prim( ctx, prims[i].mode );
+      info.start = prims[i].start;
+      info.count = prims[i].count;
+      info.instance_count = prims[i].num_instances;
+      info.index_bias = prims[i].basevertex;
+      if (!ib) {
+         info.min_index = info.start;
+         info.max_index = info.start + info.count - 1;
+      }
+
+      if (u_trim_pipe_prim(info.mode, &info.count))
+         pipe->draw_vbo(pipe, &info);
+   }
+
+   pipe_resource_reference(&ibuffer.buffer, NULL);
+}
+
+
+void st_init_draw( struct st_context *st )
+{
+   struct gl_context *ctx = st->ctx;
+
+   vbo_set_draw_func(ctx, st_draw_vbo);
+
+#if FEATURE_feedback || FEATURE_rastpos
+   st->draw = draw_create(st->pipe); /* for selection/feedback */
+
+   /* Disable draw options that might convert points/lines to tris, etc.
+    * as that would foul-up feedback/selection mode.
+    */
+   draw_wide_line_threshold(st->draw, 1000.0f);
+   draw_wide_point_threshold(st->draw, 1000.0f);
+   draw_enable_line_stipple(st->draw, FALSE);
+   draw_enable_point_sprites(st->draw, FALSE);
+#endif
+}
+
+
+void st_destroy_draw( struct st_context *st )
+{
+#if FEATURE_feedback || FEATURE_rastpos
+   draw_destroy(st->draw);
+#endif
+}
+
+