gallium: Use draw_set_index_buffer and others.

Update all drivers to use draw_set_index_buffer,
draw_set_mapped_index_buffer, and draw_vbo.  Remove
draw_set_mapped_element_buffer and draw_set_mapped_element_buffer_range.

17 files changed, 80 insertions, 172 deletions

diff --git a/src/gallium/auxiliary/draw/draw_context.c b/src/gallium/auxiliary/draw/draw_context.c
index c2b7a441bd..b39b835f05 100644
--- a/src/gallium/auxiliary/draw/draw_context.c
+++ b/src/gallium/auxiliary/draw/draw_context.c
@@ -518,48 +518,6 @@ draw_set_mapped_index_buffer(struct draw_context *draw,
 }
 
 
-/**
- * Tell the drawing context about the index/element buffer to use
- * (ala glDrawElements)
- * If no element buffer is to be used (i.e. glDrawArrays) then this
- * should be called with eltSize=0 and elements=NULL.
- *
- * \param draw  the drawing context
- * \param eltSize  size of each element (1, 2 or 4 bytes)
- * \param elements  the element buffer ptr
- */
-void
-draw_set_mapped_element_buffer_range( struct draw_context *draw,
-                                      unsigned eltSize,
-                                      int eltBias,
-                                      unsigned min_index,
-                                      unsigned max_index,
-                                      const void *elements )
-{
-   struct pipe_index_buffer ib;
-
-   memset(&ib, 0, sizeof(ib));
-   ib.index_size = eltSize;
-   draw_set_index_buffer(draw, &ib);
-
-   draw->pt.user.elts = elements;
-   draw->pt.user.eltBias = eltBias;
-   draw->pt.user.min_index = min_index;
-   draw->pt.user.max_index = max_index;
-}
-
-
-void
-draw_set_mapped_element_buffer( struct draw_context *draw,
-                                unsigned eltSize,
-                                int eltBias,
-                                const void *elements )
-{
-   draw_set_mapped_element_buffer_range(draw,
-         eltSize, eltBias, 0, 0xffffffff, elements);
-}
-
- 
 /* Revamp me please:
  */
 void draw_do_flush( struct draw_context *draw, unsigned flags )
diff --git a/src/gallium/auxiliary/draw/draw_context.h b/src/gallium/auxiliary/draw/draw_context.h
index e9f3237dda..ea55320c42 100644
--- a/src/gallium/auxiliary/draw/draw_context.h
+++ b/src/gallium/auxiliary/draw/draw_context.h
@@ -166,19 +166,6 @@ void draw_set_index_buffer(struct draw_context *draw,
 void draw_set_mapped_index_buffer(struct draw_context *draw,
                                   const void *elements);
 
-void
-draw_set_mapped_element_buffer_range( struct draw_context *draw,
-                                      unsigned eltSize,
-                                      int eltBias,
-                                      unsigned min_index,
-                                      unsigned max_index,
-                                      const void *elements );
-
-void draw_set_mapped_element_buffer( struct draw_context *draw,
-                                     unsigned eltSize, 
-                                     int eltBias,
-                                     const void *elements );
-
 void draw_set_mapped_vertex_buffer(struct draw_context *draw,
                                    unsigned attr, const void *buffer);
 
diff --git a/src/gallium/auxiliary/draw/draw_pt.c b/src/gallium/auxiliary/draw/draw_pt.c
index 8db0d73662..f81714d6b4 100644
--- a/src/gallium/auxiliary/draw/draw_pt.c
+++ b/src/gallium/auxiliary/draw/draw_pt.c
@@ -299,7 +299,6 @@ draw_arrays(struct draw_context *draw, unsigned prim,
 
 /**
  * Instanced drawing.
- * draw_set_mapped_element_buffer must be called before calling this function.
  * \sa draw_vbo
  */
 void
@@ -321,9 +320,10 @@ draw_arrays_instanced(struct draw_context *draw,
    info.instance_count = instanceCount;
 
    info.indexed = (draw->pt.user.elts != NULL);
-   info.index_bias = draw->pt.user.eltBias;
-   info.min_index = draw->pt.user.min_index;
-   info.max_index = draw->pt.user.max_index;
+   if (!info.indexed) {
+      info.min_index = start;
+      info.max_index = start + count - 1;
+   }
 
    draw_vbo(draw, &info);
 }
diff --git a/src/gallium/drivers/cell/ppu/cell_draw_arrays.c b/src/gallium/drivers/cell/ppu/cell_draw_arrays.c
index 4adef5b8c0..a367fa3fe1 100644
--- a/src/gallium/drivers/cell/ppu/cell_draw_arrays.c
+++ b/src/gallium/drivers/cell/ppu/cell_draw_arrays.c
@@ -78,20 +78,13 @@ cell_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
       draw_set_mapped_vertex_buffer(draw, i, buf);
    }
    /* Map index buffer, if present */
-   if (info->indexed && cell->index_buffer.buffer) {
+   if (info->indexed && cell->index_buffer.buffer)
       mapped_indices = cell_resource(cell->index_buffer.buffer)->data;
-      mapped_indices += cell->index_buffer.offset;
-   }
 
-   draw_set_mapped_element_buffer_range(draw, (mapped_indices) ?
-                                        lp->index_buffer.index_size : 0,
-                                        info->index_bias,
-                                        info->min_index,
-                                        info->max_index,
-                                        mapped_indices);
+   draw_set_mapped_index_buffer(draw, mapped_indices);
 
    /* draw! */
-   draw_arrays(draw, info->mode, info->start, info->count);
+   draw_vbo(draw, info);
 
    /*
     * unmap vertex/index buffers - will cause draw module to flush
@@ -100,7 +93,7 @@ cell_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
       draw_set_mapped_vertex_buffer(draw, i, NULL);
    }
    if (mapped_indices) {
-      draw_set_mapped_element_buffer(draw, 0, 0, NULL);
+      draw_set_mapped_index_buffer(draw, NULL);
    }
 
    /*
diff --git a/src/gallium/drivers/cell/ppu/cell_state_vertex.c b/src/gallium/drivers/cell/ppu/cell_state_vertex.c
index 4e3701cd0a..a065d68b5a 100644
--- a/src/gallium/drivers/cell/ppu/cell_state_vertex.c
+++ b/src/gallium/drivers/cell/ppu/cell_state_vertex.c
@@ -102,7 +102,7 @@ cell_set_index_buffer(struct pipe_context *pipe,
    else
       memset(&cell->index_buffer, 0, sizeof(cell->index_buffer));
 
-   /* TODO make this more like a state */
+   draw_set_index_buffer(cell->draw, ib);
 }
 
 
diff --git a/src/gallium/drivers/i915/i915_context.c b/src/gallium/drivers/i915/i915_context.c
index 2beb9e3091..847dd6dd47 100644
--- a/src/gallium/drivers/i915/i915_context.c
+++ b/src/gallium/drivers/i915/i915_context.c
@@ -66,18 +66,9 @@ i915_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
    /*
     * Map index buffer, if present
     */
-   if (info->indexed && i915->index_buffer.buffer) {
-      char *indices = (char *) i915_buffer(i915->index_buffer.buffer)->data;
-      mapped_indices = (void *) (indices + i915->index_buffer.offset);
-   }
-
-   draw_set_mapped_element_buffer_range(draw, (mapped_indices) ?
-                                        i915->index_buffer.index_size : 0,
-                                        info->index_bias,
-                                        info->min_index,
-                                        info->max_index,
-                                        mapped_indices);
-
+   if (info->indexed && i915->index_buffer.buffer)
+      mapped_indices = i915_buffer(i915->index_buffer.buffer)->data;
+   draw_set_mapped_index_buffer(draw, mapped_indices);
 
    draw_set_mapped_constant_buffer(draw, PIPE_SHADER_VERTEX, 0,
                                    i915->current.constants[PIPE_SHADER_VERTEX],
@@ -87,7 +78,7 @@ i915_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
    /*
     * Do the drawing
     */
-   draw_arrays(i915->draw, info->mode, info->start, info->count);
+   draw_vbo(i915->draw, info);
 
    /*
     * unmap vertex/index buffers
@@ -96,9 +87,8 @@ i915_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
       draw_set_mapped_vertex_buffer(draw, i, NULL);
    }
 
-   if (mapped_indices) {
-      draw_set_mapped_element_buffer(draw, 0, 0, NULL);
-   }
+   if (mapped_indices)
+      draw_set_mapped_index_buffer(draw, NULL);
 }
 
 
diff --git a/src/gallium/drivers/i915/i915_state.c b/src/gallium/drivers/i915/i915_state.c
index 8c53b06931..bbfcff6bc4 100644
--- a/src/gallium/drivers/i915/i915_state.c
+++ b/src/gallium/drivers/i915/i915_state.c
@@ -817,7 +817,8 @@ static void i915_set_index_buffer(struct pipe_context *pipe,
    else
       memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
 
-   /* TODO make this more like a state */
+   /* pass-through to draw module */
+   draw_set_index_buffer(i915->draw, ib);
 }
 
 static void
diff --git a/src/gallium/drivers/llvmpipe/lp_draw_arrays.c b/src/gallium/drivers/llvmpipe/lp_draw_arrays.c
index e73b431cb4..3af5c8d5c5 100644
--- a/src/gallium/drivers/llvmpipe/lp_draw_arrays.c
+++ b/src/gallium/drivers/llvmpipe/lp_draw_arrays.c
@@ -68,25 +68,17 @@ llvmpipe_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
    }
 
    /* Map index buffer, if present */
-   if (info->indexed && lp->index_buffer.buffer) {
-      char *indices = (char *) llvmpipe_resource_data(lp->index_buffer.buffer);
-      mapped_indices = (void *) (indices + lp->index_buffer.offset);
-   }
+   if (info->indexed && lp->index_buffer.buffer)
+      mapped_indices = llvmpipe_resource_data(lp->index_buffer.buffer);
 
-   draw_set_mapped_element_buffer_range(draw, (mapped_indices) ?
-                                        lp->index_buffer.index_size : 0,
-                                        info->index_bias,
-                                        info->min_index,
-                                        info->max_index,
-                                        mapped_indices);
+   draw_set_mapped_index_buffer(draw, mapped_indices);
 
    llvmpipe_prepare_vertex_sampling(lp,
                                     lp->num_vertex_sampler_views,
                                     lp->vertex_sampler_views);
 
    /* draw! */
-   draw_arrays_instanced(draw, info->mode, info->start, info->count,
-         info->start_instance, info->instance_count);
+   draw_vbo(draw, info);
 
    /*
     * unmap vertex/index buffers
@@ -95,7 +87,7 @@ llvmpipe_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
       draw_set_mapped_vertex_buffer(draw, i, NULL);
    }
    if (mapped_indices) {
-      draw_set_mapped_element_buffer(draw, 0, 0, NULL);
+      draw_set_mapped_index_buffer(draw, NULL);
    }
    llvmpipe_cleanup_vertex_sampling(lp);
 
diff --git a/src/gallium/drivers/llvmpipe/lp_state_vertex.c b/src/gallium/drivers/llvmpipe/lp_state_vertex.c
index d86e66b4fb..fb29423dd3 100644
--- a/src/gallium/drivers/llvmpipe/lp_state_vertex.c
+++ b/src/gallium/drivers/llvmpipe/lp_state_vertex.c
@@ -100,7 +100,7 @@ llvmpipe_set_index_buffer(struct pipe_context *pipe,
    else
       memset(&llvmpipe->index_buffer, 0, sizeof(llvmpipe->index_buffer));
 
-   /* TODO make this more like a state */
+   draw_set_index_buffer(llvmpipe->draw, ib);
 }
 
 void
diff --git a/src/gallium/drivers/nvfx/nvfx_draw.c b/src/gallium/drivers/nvfx/nvfx_draw.c
index 0b17921295..2601d5b8e2 100644
--- a/src/gallium/drivers/nvfx/nvfx_draw.c
+++ b/src/gallium/drivers/nvfx/nvfx_draw.c
@@ -239,12 +239,10 @@ nvfx_draw_vbo_swtnl(struct pipe_context *pipe, const struct pipe_draw_info* info
 		draw_set_mapped_vertex_buffer(nvfx->draw, i, map);
 	}
 
-	if (info->indexed) {
-		map = nvfx_buffer(nvfx->idxbuf.buffer)->data + nvfx->idxbuf.offset;
-		draw_set_mapped_element_buffer_range(nvfx->draw, nvfx->idxbuf.index_size, info->index_bias, info->min_index, info->max_index, map);
-	} else {
-		draw_set_mapped_element_buffer(nvfx->draw, 0, 0, NULL);
-	}
+	map = NULL;
+	if (info->indexed && nvfx->idxbuf.buffer)
+		map = nvfx_buffer(nvfx->idxbuf.buffer)->data;
+	draw_set_mapped_index_buffer(nvfx->draw, map);
 
 	if (nvfx->constbuf[PIPE_SHADER_VERTEX]) {
 		const unsigned nr = nvfx->constbuf_nr[PIPE_SHADER_VERTEX];
@@ -254,7 +252,7 @@ nvfx_draw_vbo_swtnl(struct pipe_context *pipe, const struct pipe_draw_info* info
                                                 map, nr);
 	}
 
-	draw_arrays_instanced(nvfx->draw, info->mode, info->start, info->count, info->start_instance, info->instance_count);
+	draw_vbo(nvfx->draw, info);
 
 	draw_flush(nvfx->draw);
 }
diff --git a/src/gallium/drivers/nvfx/nvfx_state_emit.c b/src/gallium/drivers/nvfx/nvfx_state_emit.c
index cfcb0f7ef6..390bca8cdb 100644
--- a/src/gallium/drivers/nvfx/nvfx_state_emit.c
+++ b/src/gallium/drivers/nvfx/nvfx_state_emit.c
@@ -335,6 +335,9 @@ nvfx_state_validate_swtnl(struct nvfx_context *nvfx)
 		draw_set_vertex_elements(draw, nvfx->vtxelt->num_elements, nvfx->vtxelt->pipe);
 	}
 
+	if (nvfx->draw_dirty & NVFX_NEW_INDEX)
+		draw_set_index_buffer(draw, &nvfx->idxbuf);
+
 	nvfx_state_validate_common(nvfx);
 
 	nvfx->draw_dirty = 0;
diff --git a/src/gallium/drivers/r300/r300_render.c b/src/gallium/drivers/r300/r300_render.c
index e08335a105..20bad2c56f 100644
--- a/src/gallium/drivers/r300/r300_render.c
+++ b/src/gallium/drivers/r300/r300_render.c
@@ -680,18 +680,11 @@ static void r300_swtcl_draw_vbo(struct pipe_context* pipe,
     if (info->indexed && r300->index_buffer.buffer) {
         indices = pipe_buffer_map(pipe, r300->index_buffer.buffer,
                                   PIPE_TRANSFER_READ, &ib_transfer);
-        if (indices)
-            indices = (void *) ((char *) indices + r300->index_buffer.offset);
     }
 
-    draw_set_mapped_element_buffer_range(r300->draw, (indices) ?
-                                         r300->index_buffer.index_size : 0,
-                                         info->index_bias,
-                                         info->min_index,
-                                         info->max_index,
-                                         indices);
+    draw_set_mapped_index_buffer(r300->draw, indices);
 
-    draw_arrays(r300->draw, info->mode, info->start, count);
+    draw_vbo(r300->draw, info);
 
     /* XXX Not sure whether this is the best fix.
      * It prevents CS from being rejected and weird assertion failures. */
@@ -707,8 +700,7 @@ static void r300_swtcl_draw_vbo(struct pipe_context* pipe,
 
     if (ib_transfer) {
         pipe_buffer_unmap(pipe, r300->index_buffer.buffer, ib_transfer);
-        draw_set_mapped_element_buffer_range(r300->draw, 0, 0, info->start,
-                info->start + count - 1, NULL);
+        draw_set_mapped_index_buffer(r300->draw, NULL);
     }
 }
 
diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c
index 47e359cd5f..5c225e24f9 100644
--- a/src/gallium/drivers/r300/r300_state.c
+++ b/src/gallium/drivers/r300/r300_state.c
@@ -1556,7 +1556,12 @@ static void r300_set_index_buffer(struct pipe_context* pipe,
         memset(&r300->index_buffer, 0, sizeof(r300->index_buffer));
     }
 
-    /* TODO make this more like a state */
+    if (r300->screen->caps.has_tcl) {
+       /* TODO make this more like a state */
+    }
+    else {
+       draw_set_index_buffer(r300->draw, ib);
+    }
 }
 
 /* Initialize the PSC tables. */
diff --git a/src/gallium/drivers/softpipe/sp_draw_arrays.c b/src/gallium/drivers/softpipe/sp_draw_arrays.c
index 386c8acb8c..01b4ca985d 100644
--- a/src/gallium/drivers/softpipe/sp_draw_arrays.c
+++ b/src/gallium/drivers/softpipe/sp_draw_arrays.c
@@ -75,14 +75,10 @@ softpipe_draw_stream_output(struct pipe_context *pipe, unsigned mode)
    buf = (void*)((int32_t*)buf + offset);
    draw_set_mapped_vertex_buffer(draw, 0, buf);
 
-   draw_set_mapped_element_buffer_range(draw,
-                                        0, 0,
-                                        start,
-                                        start + count - 1,
-                                        NULL);
+   draw_set_mapped_index_buffer(draw, NULL);
 
    /* draw! */
-   draw_arrays_instanced(draw, mode, start, count, 0, 1);
+   draw_arrays(draw, mode, start, count);
 
    /* unmap vertex/index buffers - will cause draw module to flush */
    draw_set_mapped_vertex_buffer(draw, 0, NULL);
@@ -138,28 +134,20 @@ softpipe_draw_vbo(struct pipe_context *pipe,
    }
 
    /* Map index buffer, if present */
-   if (info->indexed && sp->index_buffer.buffer) {
-      char *indices = (char *) softpipe_resource(sp->index_buffer.buffer)->data;
-      mapped_indices = (void *) (indices + sp->index_buffer.offset);
-   }
+   if (info->indexed && sp->index_buffer.buffer)
+      mapped_indices = softpipe_resource(sp->index_buffer.buffer)->data;
 
-   draw_set_mapped_element_buffer_range(draw, (mapped_indices) ?
-                                        sp->index_buffer.index_size : 0,
-                                        info->index_bias,
-                                        info->min_index,
-                                        info->max_index,
-                                        mapped_indices);
+   draw_set_mapped_index_buffer(draw, mapped_indices);
 
    /* draw! */
-   draw_arrays_instanced(draw, info->mode, info->start, info->count,
-         info->start_instance, info->instance_count);
+   draw_vbo(draw, info);
 
    /* unmap vertex/index buffers - will cause draw module to flush */
    for (i = 0; i < sp->num_vertex_buffers; i++) {
       draw_set_mapped_vertex_buffer(draw, i, NULL);
    }
    if (mapped_indices) {
-      draw_set_mapped_element_buffer(draw, 0, 0, NULL);
+      draw_set_mapped_index_buffer(draw, NULL);
    }
 
    /*
diff --git a/src/gallium/drivers/softpipe/sp_state_vertex.c b/src/gallium/drivers/softpipe/sp_state_vertex.c
index 880a7c7cd2..b650fcaea5 100644
--- a/src/gallium/drivers/softpipe/sp_state_vertex.c
+++ b/src/gallium/drivers/softpipe/sp_state_vertex.c
@@ -100,5 +100,5 @@ softpipe_set_index_buffer(struct pipe_context *pipe,
    else
       memset(&softpipe->index_buffer, 0, sizeof(softpipe->index_buffer));
 
-   /* TODO make this more like a state */
+   draw_set_index_buffer(softpipe->draw, ib);
 }
diff --git a/src/gallium/drivers/svga/svga_swtnl_draw.c b/src/gallium/drivers/svga/svga_swtnl_draw.c
index 4f83822b5c..e9eba3b422 100644
--- a/src/gallium/drivers/svga/svga_swtnl_draw.c
+++ b/src/gallium/drivers/svga/svga_swtnl_draw.c
@@ -71,22 +71,17 @@ svga_swtnl_draw_vbo(struct svga_context *svga,
       draw_set_mapped_vertex_buffer(draw, i, map);
    }
 
+   /* TODO move this to update_swtnl_draw */
+   draw_set_index_buffer(draw, &svga->curr.ib);
+
    /* Map index buffer, if present */
    map = NULL;
    if (info->indexed && svga->curr.ib.buffer) {
       map = pipe_buffer_map(&svga->pipe, svga->curr.ib.buffer,
                             PIPE_TRANSFER_READ,
                             &ib_transfer);
-      if (map)
-         map = (const void *) ((const char *) map + svga->curr.ib.offset);
    }
-
-   draw_set_mapped_element_buffer_range(draw, (map) ?
-                                        svga->curr.ib.index_size : 0,
-                                        info->index_bias,
-                                        info->min_index,
-                                        info->max_index,
-                                        map);
+   draw_set_mapped_index_buffer(draw, map);
 
    if (svga->curr.cb[PIPE_SHADER_VERTEX]) {
       map = pipe_buffer_map(&svga->pipe,
@@ -100,7 +95,7 @@ svga_swtnl_draw_vbo(struct svga_context *svga,
          svga->curr.cb[PIPE_SHADER_VERTEX]->width0);
    }
 
-   draw_arrays(draw, info->mode, info->start, info->count);
+   draw_vbo(draw, info);
 
    draw_flush(svga->swtnl.draw);
 
@@ -118,7 +113,7 @@ svga_swtnl_draw_vbo(struct svga_context *svga,
 
    if (ib_transfer) {
       pipe_buffer_unmap(&svga->pipe, svga->curr.ib.buffer, ib_transfer);
-      draw_set_mapped_element_buffer(draw, 0, 0, NULL);
+      draw_set_mapped_index_buffer(draw, NULL);
    }
 
    if (svga->curr.cb[PIPE_SHADER_VERTEX]) {
diff --git a/src/mesa/state_tracker/st_draw_feedback.c b/src/mesa/state_tracker/st_draw_feedback.c
index 5cf2666334..e0995f8318 100644
--- a/src/mesa/state_tracker/st_draw_feedback.c
+++ b/src/mesa/state_tracker/st_draw_feedback.c
@@ -40,6 +40,7 @@
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "util/u_inlines.h"
+#include "util/u_draw.h"
 
 #include "draw/draw_private.h"
 #include "draw/draw_context.h"
@@ -104,14 +105,15 @@ st_feedback_draw_vbo(GLcontext *ctx,
    struct draw_context *draw = st->draw;
    const struct st_vertex_program *vp;
    const struct pipe_shader_state *vs;
-   struct pipe_resource *index_buffer_handle = 0;
    struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
+   struct pipe_index_buffer ibuffer;
    struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS];
    struct pipe_transfer *ib_transfer = NULL;
    struct pipe_transfer *cb_transfer;
    GLuint attr, i;
    ubyte *mapped_constants;
+   const void *mapped_indices = NULL;
 
    assert(draw);
 
@@ -204,17 +206,19 @@ st_feedback_draw_vbo(GLcontext *ctx,
    draw_set_vertex_buffers(draw, vp->num_inputs, vbuffers);
    draw_set_vertex_elements(draw, vp->num_inputs, velements);
 
+   memset(&ibuffer, 0, sizeof(ibuffer));
    if (ib) {
       struct gl_buffer_object *bufobj = ib->obj;
-      unsigned indexSize;
-      void *map;
 
       switch (ib->type) {
       case GL_UNSIGNED_INT:
-         indexSize = 4;
+         ibuffer.index_size = 4;
          break;
       case GL_UNSIGNED_SHORT:
-         indexSize = 2;
+         ibuffer.index_size = 2;
+         break;
+      case GL_UNSIGNED_BYTE:
+         ibuffer.index_size = 1;
          break;
       default:
          assert(0);
@@ -224,23 +228,20 @@ st_feedback_draw_vbo(GLcontext *ctx,
       if (bufobj && bufobj->Name) {
          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 
-         index_buffer_handle = stobj->buffer;
-
-         map = pipe_buffer_map(pipe, index_buffer_handle,
-                               PIPE_TRANSFER_READ, &ib_transfer);
+         pipe_resource_reference(&ibuffer.buffer, stobj->buffer);
+         ibuffer.offset = pointer_to_offset(ib->ptr);
 
-         draw_set_mapped_element_buffer(draw, indexSize, 0, map);
+         mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
+                                          PIPE_TRANSFER_READ, &ib_transfer);
       }
       else {
-         draw_set_mapped_element_buffer(draw, indexSize, 0, (void *) ib->ptr);
-	 ib_transfer = NULL;
+         /* skip setting ibuffer.buffer as the draw module does not use it */
+         mapped_indices = ib->ptr;
       }
-   }
-   else {
-      /* no index/element buffer */
-      draw_set_mapped_element_buffer(draw, 0, 0, NULL);
-   }
 
+      draw_set_index_buffer(draw, &ibuffer);
+      draw_set_mapped_index_buffer(draw, mapped_indices);
+   }
 
    /* map constant buffers */
    mapped_constants = pipe_buffer_map(pipe,
@@ -273,9 +274,14 @@ st_feedback_draw_vbo(GLcontext *ctx,
          draw_set_mapped_vertex_buffer(draw, i, NULL);
       }
    }
-   if (index_buffer_handle) {
-      pipe_buffer_unmap(pipe, index_buffer_handle, ib_transfer);
-      draw_set_mapped_element_buffer(draw, 0, 0, NULL);
+
+   if (ib) {
+      draw_set_mapped_index_buffer(draw, NULL);
+      draw_set_index_buffer(draw, NULL);
+
+      if (ib_transfer)
+         pipe_buffer_unmap(pipe, ibuffer.buffer, ib_transfer);
+      pipe_resource_reference(&ibuffer.buffer, NULL);
    }
 }