Synchronised line endinge with release branch

1 files changed, 648 insertions, 648 deletions

diff --git a/mesalib/src/gallium/auxiliary/util/u_vbuf_mgr.c b/mesalib/src/gallium/auxiliary/util/u_vbuf_mgr.c
index da250cba9..d9b39e528 100644
--- a/mesalib/src/gallium/auxiliary/util/u_vbuf_mgr.c
+++ b/mesalib/src/gallium/auxiliary/util/u_vbuf_mgr.c
@@ -1,648 +1,648 @@
-/**************************************************************************

- *

- * Copyright 2011 Marek Olšák <maraeo@gmail.com>

- * 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 AUTHORS 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 "util/u_vbuf_mgr.h"

-

-#include "util/u_format.h"

-#include "util/u_inlines.h"

-#include "util/u_memory.h"

-#include "util/u_upload_mgr.h"

-#include "translate/translate.h"

-#include "translate/translate_cache.h"

-

-struct u_vbuf_mgr_elements {

-   unsigned count;

-   struct pipe_vertex_element ve[PIPE_MAX_ATTRIBS];

-

-   unsigned src_format_size[PIPE_MAX_ATTRIBS];

-

-   /* If (velem[i].src_format != native_format[i]), the vertex buffer

-    * referenced by the vertex element cannot be used for rendering and

-    * its vertex data must be translated to native_format[i]. */

-   enum pipe_format native_format[PIPE_MAX_ATTRIBS];

-   unsigned native_format_size[PIPE_MAX_ATTRIBS];

-

-   /* This might mean two things:

-    * - src_format != native_format, as discussed above.

-    * - src_offset % 4 != 0 (if the caps don't allow such an offset). */

-   boolean incompatible_layout;

-};

-

-struct u_vbuf_mgr_priv {

-   struct u_vbuf_mgr b;

-   struct pipe_context *pipe;

-

-   struct translate_cache *translate_cache;

-   unsigned translate_vb_slot;

-

-   struct u_vbuf_mgr_elements *ve;

-   void *saved_ve, *fallback_ve;

-   boolean ve_binding_lock;

-

-   unsigned saved_buffer_offset[PIPE_MAX_ATTRIBS];

-

-   boolean any_user_vbs;

-   boolean incompatible_vb_layout;

-};

-

-static void u_vbuf_mgr_init_format_caps(struct u_vbuf_mgr_priv *mgr)

-{

-   struct pipe_screen *screen = mgr->pipe->screen;

-

-   mgr->b.caps.format_fixed32 =

-      screen->is_format_supported(screen, PIPE_FORMAT_R32_FIXED, PIPE_BUFFER,

-                                  0, PIPE_BIND_VERTEX_BUFFER);

-

-   mgr->b.caps.format_float16 =

-      screen->is_format_supported(screen, PIPE_FORMAT_R16_FLOAT, PIPE_BUFFER,

-                                  0, PIPE_BIND_VERTEX_BUFFER);

-

-   mgr->b.caps.format_float64 =

-      screen->is_format_supported(screen, PIPE_FORMAT_R64_FLOAT, PIPE_BUFFER,

-                                  0, PIPE_BIND_VERTEX_BUFFER);

-

-   mgr->b.caps.format_norm32 =

-      screen->is_format_supported(screen, PIPE_FORMAT_R32_UNORM, PIPE_BUFFER,

-                                  0, PIPE_BIND_VERTEX_BUFFER) &&

-      screen->is_format_supported(screen, PIPE_FORMAT_R32_SNORM, PIPE_BUFFER,

-                                  0, PIPE_BIND_VERTEX_BUFFER);

-

-   mgr->b.caps.format_scaled32 =

-      screen->is_format_supported(screen, PIPE_FORMAT_R32_USCALED, PIPE_BUFFER,

-                                  0, PIPE_BIND_VERTEX_BUFFER) &&

-      screen->is_format_supported(screen, PIPE_FORMAT_R32_SSCALED, PIPE_BUFFER,

-                                  0, PIPE_BIND_VERTEX_BUFFER);

-}

-

-struct u_vbuf_mgr *

-u_vbuf_mgr_create(struct pipe_context *pipe,

-                  unsigned upload_buffer_size,

-                  unsigned upload_buffer_alignment,

-                  unsigned upload_buffer_bind,

-                  enum u_fetch_alignment fetch_alignment)

-{

-   struct u_vbuf_mgr_priv *mgr = CALLOC_STRUCT(u_vbuf_mgr_priv);

-

-   mgr->pipe = pipe;

-   mgr->translate_cache = translate_cache_create();

-

-   mgr->b.uploader = u_upload_create(pipe, upload_buffer_size,

-                                     upload_buffer_alignment,

-                                     upload_buffer_bind);

-

-   mgr->b.caps.fetch_dword_unaligned =

-         fetch_alignment == U_VERTEX_FETCH_BYTE_ALIGNED;

-

-   u_vbuf_mgr_init_format_caps(mgr);

-

-   return &mgr->b;

-}

-

-void u_vbuf_mgr_destroy(struct u_vbuf_mgr *mgrb)

-{

-   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;

-   unsigned i;

-

-   for (i = 0; i < mgr->b.nr_real_vertex_buffers; i++) {

-      pipe_resource_reference(&mgr->b.vertex_buffer[i].buffer, NULL);

-      pipe_resource_reference(&mgr->b.real_vertex_buffer[i], NULL);

-   }

-

-   translate_cache_destroy(mgr->translate_cache);

-   u_upload_destroy(mgr->b.uploader);

-   FREE(mgr);

-}

-

-

-static enum u_vbuf_return_flags

-u_vbuf_translate_begin(struct u_vbuf_mgr_priv *mgr,

-                       int min_index, int max_index)

-{

-   struct translate_key key;

-   struct translate_element *te;

-   unsigned tr_elem_index[PIPE_MAX_ATTRIBS];

-   struct translate *tr;

-   boolean vb_translated[PIPE_MAX_ATTRIBS] = {0};

-   uint8_t *vb_map[PIPE_MAX_ATTRIBS] = {0}, *out_map;

-   struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {0};

-   struct pipe_resource *out_buffer = NULL;

-   unsigned i, num_verts, out_offset;

-   struct pipe_vertex_element new_velems[PIPE_MAX_ATTRIBS];

-   boolean upload_flushed = FALSE;

-

-   memset(&key, 0, sizeof(key));

-   memset(tr_elem_index, 0xff, sizeof(tr_elem_index));

-

-   /* Initialize the translate key, i.e. the recipe how vertices should be

-     * translated. */

-   memset(&key, 0, sizeof key);

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

-      struct pipe_vertex_buffer *vb =

-            &mgr->b.vertex_buffer[mgr->ve->ve[i].vertex_buffer_index];

-      enum pipe_format output_format = mgr->ve->native_format[i];

-      unsigned output_format_size = mgr->ve->native_format_size[i];

-

-      /* Check for support. */

-      if (mgr->ve->ve[i].src_format == mgr->ve->native_format[i] &&

-          (mgr->b.caps.fetch_dword_unaligned ||

-           (vb->buffer_offset % 4 == 0 &&

-            vb->stride % 4 == 0 &&

-            mgr->ve->ve[i].src_offset % 4 == 0))) {

-         continue;

-      }

-

-      /* Workaround for translate: output floats instead of halfs. */

-      switch (output_format) {

-      case PIPE_FORMAT_R16_FLOAT:

-         output_format = PIPE_FORMAT_R32_FLOAT;

-         output_format_size = 4;

-         break;

-      case PIPE_FORMAT_R16G16_FLOAT:

-         output_format = PIPE_FORMAT_R32G32_FLOAT;

-         output_format_size = 8;

-         break;

-      case PIPE_FORMAT_R16G16B16_FLOAT:

-         output_format = PIPE_FORMAT_R32G32B32_FLOAT;

-         output_format_size = 12;

-         break;

-      case PIPE_FORMAT_R16G16B16A16_FLOAT:

-         output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;

-         output_format_size = 16;

-         break;

-      default:;

-      }

-

-      /* Add this vertex element. */

-      te = &key.element[key.nr_elements];

-      /*te->type;

-        te->instance_divisor;*/

-      te->input_buffer = mgr->ve->ve[i].vertex_buffer_index;

-      te->input_format = mgr->ve->ve[i].src_format;

-      te->input_offset = mgr->ve->ve[i].src_offset;

-      te->output_format = output_format;

-      te->output_offset = key.output_stride;

-

-      key.output_stride += output_format_size;

-      vb_translated[mgr->ve->ve[i].vertex_buffer_index] = TRUE;

-      tr_elem_index[i] = key.nr_elements;

-      key.nr_elements++;

-   }

-

-   /* Get a translate object. */

-   tr = translate_cache_find(mgr->translate_cache, &key);

-

-   /* Map buffers we want to translate. */

-   for (i = 0; i < mgr->b.nr_vertex_buffers; i++) {

-      if (vb_translated[i]) {

-         struct pipe_vertex_buffer *vb = &mgr->b.vertex_buffer[i];

-

-         vb_map[i] = pipe_buffer_map(mgr->pipe, vb->buffer,

-                                     PIPE_TRANSFER_READ, &vb_transfer[i]);

-

-         tr->set_buffer(tr, i,

-                        vb_map[i] + vb->buffer_offset + vb->stride * min_index,

-                        vb->stride, ~0);

-      }

-   }

-

-   /* Create and map the output buffer. */

-   num_verts = max_index + 1 - min_index;

-

-   u_upload_alloc(mgr->b.uploader,

-                  key.output_stride * min_index,

-                  key.output_stride * num_verts,

-                  &out_offset, &out_buffer, &upload_flushed,

-                  (void**)&out_map);

-

-   out_offset -= key.output_stride * min_index;

-

-   /* Translate. */

-   tr->run(tr, 0, num_verts, 0, out_map);

-

-   /* Unmap all buffers. */

-   for (i = 0; i < mgr->b.nr_vertex_buffers; i++) {

-      if (vb_translated[i]) {

-         pipe_buffer_unmap(mgr->pipe, vb_transfer[i]);

-      }

-   }

-

-   /* Setup the new vertex buffer in the first free slot. */

-   mgr->translate_vb_slot = ~0;

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

-      if (!mgr->b.vertex_buffer[i].buffer) {

-         mgr->translate_vb_slot = i;

-

-         if (i >= mgr->b.nr_vertex_buffers) {

-            mgr->b.nr_real_vertex_buffers = i+1;

-         }

-         break;

-      }

-   }

-

-   if (mgr->translate_vb_slot != ~0) {

-      /* Setup the new vertex buffer. */

-      pipe_resource_reference(

-            &mgr->b.real_vertex_buffer[mgr->translate_vb_slot], out_buffer);

-      mgr->b.vertex_buffer[mgr->translate_vb_slot].buffer_offset = out_offset;

-      mgr->b.vertex_buffer[mgr->translate_vb_slot].stride = key.output_stride;

-

-      /* Setup new vertex elements. */

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

-         if (tr_elem_index[i] < key.nr_elements) {

-            te = &key.element[tr_elem_index[i]];

-            new_velems[i].instance_divisor = mgr->ve->ve[i].instance_divisor;

-            new_velems[i].src_format = te->output_format;

-            new_velems[i].src_offset = te->output_offset;

-            new_velems[i].vertex_buffer_index = mgr->translate_vb_slot;

-         } else {

-            memcpy(&new_velems[i], &mgr->ve->ve[i],

-                   sizeof(struct pipe_vertex_element));

-         }

-      }

-

-      mgr->fallback_ve =

-            mgr->pipe->create_vertex_elements_state(mgr->pipe, mgr->ve->count,

-                                                    new_velems);

-

-      /* Preserve saved_ve. */

-      mgr->ve_binding_lock = TRUE;

-      mgr->pipe->bind_vertex_elements_state(mgr->pipe, mgr->fallback_ve);

-      mgr->ve_binding_lock = FALSE;

-   }

-

-   pipe_resource_reference(&out_buffer, NULL);

-

-   return upload_flushed ? U_VBUF_UPLOAD_FLUSHED : 0;

-}

-

-static void u_vbuf_translate_end(struct u_vbuf_mgr_priv *mgr)

-{

-   if (mgr->fallback_ve == NULL) {

-      return;

-   }

-

-   /* Restore vertex elements. */

-   /* Note that saved_ve will be overwritten in bind_vertex_elements_state. */

-   mgr->pipe->bind_vertex_elements_state(mgr->pipe, mgr->saved_ve);

-   mgr->pipe->delete_vertex_elements_state(mgr->pipe, mgr->fallback_ve);

-   mgr->fallback_ve = NULL;

-

-   /* Delete the now-unused VBO. */

-   pipe_resource_reference(&mgr->b.real_vertex_buffer[mgr->translate_vb_slot],

-                           NULL);

-   mgr->b.nr_real_vertex_buffers = mgr->b.nr_vertex_buffers;

-}

-

-#define FORMAT_REPLACE(what, withwhat) \

-    case PIPE_FORMAT_##what: format = PIPE_FORMAT_##withwhat; break

-

-struct u_vbuf_mgr_elements *

-u_vbuf_mgr_create_vertex_elements(struct u_vbuf_mgr *mgrb,

-                                  unsigned count,

-                                  const struct pipe_vertex_element *attribs,

-                                  struct pipe_vertex_element *native_attribs)

-{

-   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;

-   unsigned i;

-   struct u_vbuf_mgr_elements *ve = CALLOC_STRUCT(u_vbuf_mgr_elements);

-

-   ve->count = count;

-

-   if (!count) {

-      return ve;

-   }

-

-   memcpy(ve->ve, attribs, sizeof(struct pipe_vertex_element) * count);

-   memcpy(native_attribs, attribs, sizeof(struct pipe_vertex_element) * count);

-

-   /* Set the best native format in case the original format is not

-    * supported. */

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

-      enum pipe_format format = ve->ve[i].src_format;

-

-      ve->src_format_size[i] = util_format_get_blocksize(format);

-

-      /* Choose a native format.

-       * For now we don't care about the alignment, that's going to

-       * be sorted out later. */

-      if (!mgr->b.caps.format_fixed32) {

-         switch (format) {

-            FORMAT_REPLACE(R32_FIXED,           R32_FLOAT);

-            FORMAT_REPLACE(R32G32_FIXED,        R32G32_FLOAT);

-            FORMAT_REPLACE(R32G32B32_FIXED,     R32G32B32_FLOAT);

-            FORMAT_REPLACE(R32G32B32A32_FIXED,  R32G32B32A32_FLOAT);

-            default:;

-         }

-      }

-      if (!mgr->b.caps.format_float16) {

-         switch (format) {

-            FORMAT_REPLACE(R16_FLOAT,           R32_FLOAT);

-            FORMAT_REPLACE(R16G16_FLOAT,        R32G32_FLOAT);

-            FORMAT_REPLACE(R16G16B16_FLOAT,     R32G32B32_FLOAT);

-            FORMAT_REPLACE(R16G16B16A16_FLOAT,  R32G32B32A32_FLOAT);

-            default:;

-         }

-      }

-      if (!mgr->b.caps.format_float64) {

-         switch (format) {

-            FORMAT_REPLACE(R64_FLOAT,           R32_FLOAT);

-            FORMAT_REPLACE(R64G64_FLOAT,        R32G32_FLOAT);

-            FORMAT_REPLACE(R64G64B64_FLOAT,     R32G32B32_FLOAT);

-            FORMAT_REPLACE(R64G64B64A64_FLOAT,  R32G32B32A32_FLOAT);

-            default:;

-         }

-      }

-      if (!mgr->b.caps.format_norm32) {

-         switch (format) {

-            FORMAT_REPLACE(R32_UNORM,           R32_FLOAT);

-            FORMAT_REPLACE(R32G32_UNORM,        R32G32_FLOAT);

-            FORMAT_REPLACE(R32G32B32_UNORM,     R32G32B32_FLOAT);

-            FORMAT_REPLACE(R32G32B32A32_UNORM,  R32G32B32A32_FLOAT);

-            FORMAT_REPLACE(R32_SNORM,           R32_FLOAT);

-            FORMAT_REPLACE(R32G32_SNORM,        R32G32_FLOAT);

-            FORMAT_REPLACE(R32G32B32_SNORM,     R32G32B32_FLOAT);

-            FORMAT_REPLACE(R32G32B32A32_SNORM,  R32G32B32A32_FLOAT);

-            default:;

-         }

-      }

-      if (!mgr->b.caps.format_scaled32) {

-         switch (format) {

-            FORMAT_REPLACE(R32_USCALED,         R32_FLOAT);

-            FORMAT_REPLACE(R32G32_USCALED,      R32G32_FLOAT);

-            FORMAT_REPLACE(R32G32B32_USCALED,   R32G32B32_FLOAT);

-            FORMAT_REPLACE(R32G32B32A32_USCALED,R32G32B32A32_FLOAT);

-            FORMAT_REPLACE(R32_SSCALED,         R32_FLOAT);

-            FORMAT_REPLACE(R32G32_SSCALED,      R32G32_FLOAT);

-            FORMAT_REPLACE(R32G32B32_SSCALED,   R32G32B32_FLOAT);

-            FORMAT_REPLACE(R32G32B32A32_SSCALED,R32G32B32A32_FLOAT);

-            default:;

-         }

-      }

-

-      native_attribs[i].src_format = format;

-      ve->native_format[i] = format;

-      ve->native_format_size[i] =

-            util_format_get_blocksize(ve->native_format[i]);

-

-      ve->incompatible_layout =

-            ve->incompatible_layout ||

-            ve->ve[i].src_format != ve->native_format[i] ||

-            (!mgr->b.caps.fetch_dword_unaligned && ve->ve[i].src_offset % 4 != 0);

-   }

-

-   /* Align the formats to the size of DWORD if needed. */

-   if (!mgr->b.caps.fetch_dword_unaligned) {

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

-         ve->native_format_size[i] = align(ve->native_format_size[i], 4);

-      }

-   }

-

-   return ve;

-}

-

-void u_vbuf_mgr_bind_vertex_elements(struct u_vbuf_mgr *mgrb,

-                                     void *cso,

-                                     struct u_vbuf_mgr_elements *ve)

-{

-   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;

-

-   if (!cso) {

-      return;

-   }

-

-   if (!mgr->ve_binding_lock) {

-      mgr->saved_ve = cso;

-      mgr->ve = ve;

-   }

-}

-

-void u_vbuf_mgr_destroy_vertex_elements(struct u_vbuf_mgr *mgr,

-                                        struct u_vbuf_mgr_elements *ve)

-{

-   FREE(ve);

-}

-

-void u_vbuf_mgr_set_vertex_buffers(struct u_vbuf_mgr *mgrb,

-                                   unsigned count,

-                                   const struct pipe_vertex_buffer *bufs)

-{

-   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;

-   unsigned i;

-

-   mgr->any_user_vbs = FALSE;

-   mgr->incompatible_vb_layout = FALSE;

-

-   if (!mgr->b.caps.fetch_dword_unaligned) {

-      /* Check if the strides and offsets are aligned to the size of DWORD. */

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

-         if (bufs[i].buffer) {

-            if (bufs[i].stride % 4 != 0 ||

-                bufs[i].buffer_offset % 4 != 0) {

-               mgr->incompatible_vb_layout = TRUE;

-               break;

-            }

-         }

-      }

-   }

-

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

-      const struct pipe_vertex_buffer *vb = &bufs[i];

-

-      pipe_resource_reference(&mgr->b.vertex_buffer[i].buffer, vb->buffer);

-      pipe_resource_reference(&mgr->b.real_vertex_buffer[i], NULL);

-      mgr->saved_buffer_offset[i] = vb->buffer_offset;

-

-      if (!vb->buffer) {

-         continue;

-      }

-

-      if (u_vbuf_resource(vb->buffer)->user_ptr) {

-         mgr->any_user_vbs = TRUE;

-         continue;

-      }

-

-      pipe_resource_reference(&mgr->b.real_vertex_buffer[i], vb->buffer);

-   }

-

-   for (; i < mgr->b.nr_real_vertex_buffers; i++) {

-      pipe_resource_reference(&mgr->b.vertex_buffer[i].buffer, NULL);

-      pipe_resource_reference(&mgr->b.real_vertex_buffer[i], NULL);

-   }

-

-   memcpy(mgr->b.vertex_buffer, bufs,

-          sizeof(struct pipe_vertex_buffer) * count);

-

-   mgr->b.nr_vertex_buffers = count;

-   mgr->b.nr_real_vertex_buffers = count;

-}

-

-static enum u_vbuf_return_flags

-u_vbuf_upload_buffers(struct u_vbuf_mgr_priv *mgr,

-                      int min_index, int max_index,

-                      unsigned instance_count)

-{

-   unsigned i, nr = mgr->ve->count;

-   unsigned count = max_index + 1 - min_index;

-   boolean uploaded[PIPE_MAX_ATTRIBS] = {0};

-   enum u_vbuf_return_flags retval = 0;

-

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

-      unsigned index = mgr->ve->ve[i].vertex_buffer_index;

-      struct pipe_vertex_buffer *vb = &mgr->b.vertex_buffer[index];

-

-      if (vb->buffer &&

-          u_vbuf_resource(vb->buffer)->user_ptr &&

-          !uploaded[index]) {

-         unsigned first, size;

-         boolean flushed;

-         unsigned instance_div = mgr->ve->ve[i].instance_divisor;

-

-         if (instance_div) {

-            first = 0;

-            size = vb->stride *

-                   ((instance_count + instance_div - 1) / instance_div);

-         } else if (vb->stride) {

-            first = vb->stride * min_index;

-            size = vb->stride * count;

-

-            /* Unusual case when stride is smaller than the format size.

-             * XXX This won't work with interleaved arrays. */

-            if (mgr->ve->native_format_size[i] > vb->stride)

-               size += mgr->ve->native_format_size[i] - vb->stride;

-         } else {

-            first = 0;

-            size = mgr->ve->native_format_size[i];

-         }

-

-         u_upload_data(mgr->b.uploader, first, size,

-                       u_vbuf_resource(vb->buffer)->user_ptr + first,

-                       &vb->buffer_offset,

-                       &mgr->b.real_vertex_buffer[index],

-                       &flushed);

-

-         vb->buffer_offset -= first;

-

-         uploaded[index] = TRUE;

-         if (flushed)

-            retval |= U_VBUF_UPLOAD_FLUSHED;

-      } else {

-         assert(mgr->b.real_vertex_buffer[index]);

-      }

-   }

-

-   return retval;

-}

-

-static void u_vbuf_mgr_compute_max_index(struct u_vbuf_mgr_priv *mgr)

-{

-   unsigned i, nr = mgr->ve->count;

-

-   mgr->b.max_index = ~0;

-

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

-      struct pipe_vertex_buffer *vb =

-            &mgr->b.vertex_buffer[mgr->ve->ve[i].vertex_buffer_index];

-      int unused;

-      unsigned max_index;

-

-      if (!vb->buffer ||

-          !vb->stride ||

-          u_vbuf_resource(vb->buffer)->user_ptr) {

-         continue;

-      }

-

-      /* How many bytes is unused after the last vertex.

-       * width0 may be "count*stride - unused" and we have to compensate

-       * for that when dividing by stride. */

-      unused = vb->stride -

-               (mgr->ve->ve[i].src_offset + mgr->ve->src_format_size[i]);

-

-      /* If src_offset is greater than stride (which means it's a buffer

-       * offset rather than a vertex offset)... */

-      if (unused < 0) {

-         unused = 0;

-      }

-

-      /* Compute the maximum index for this vertex element. */

-      max_index =

-         (vb->buffer->width0 - vb->buffer_offset + (unsigned)unused) /

-         vb->stride - 1;

-

-      mgr->b.max_index = MIN2(mgr->b.max_index, max_index);

-   }

-}

-

-enum u_vbuf_return_flags

-u_vbuf_mgr_draw_begin(struct u_vbuf_mgr *mgrb,

-                      const struct pipe_draw_info *info)

-{

-   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;

-   int min_index, max_index;

-   enum u_vbuf_return_flags retval = 0;

-

-   u_vbuf_mgr_compute_max_index(mgr);

-

-   min_index = info->min_index - info->index_bias;

-   if (info->max_index == ~0) {

-      max_index = mgr->b.max_index;

-   } else {

-      max_index = MIN2(info->max_index - info->index_bias, mgr->b.max_index);

-   }

-

-   /* Translate vertices with non-native layouts or formats. */

-   if (mgr->incompatible_vb_layout || mgr->ve->incompatible_layout) {

-      retval |= u_vbuf_translate_begin(mgr, min_index, max_index);

-

-      if (mgr->fallback_ve) {

-         retval |= U_VBUF_BUFFERS_UPDATED;

-      }

-   }

-

-   /* Upload user buffers. */

-   if (mgr->any_user_vbs) {

-      retval |= u_vbuf_upload_buffers(mgr, min_index, max_index,

-                                      info->instance_count);

-      retval |= U_VBUF_BUFFERS_UPDATED;

-   }

-   return retval;

-}

-

-void u_vbuf_mgr_draw_end(struct u_vbuf_mgr *mgrb)

-{

-   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;

-   unsigned i;

-

-   /* buffer offsets were modified in u_vbuf_upload_buffers */

-   if (mgr->any_user_vbs) {

-      for (i = 0; i < mgr->b.nr_vertex_buffers; i++)

-         mgr->b.vertex_buffer[i].buffer_offset = mgr->saved_buffer_offset[i];

-   }

-

-   if (mgr->fallback_ve) {

-      u_vbuf_translate_end(mgr);

-   }

-}

+/**************************************************************************
+ *
+ * Copyright 2011 Marek Olšák <maraeo@gmail.com>
+ * 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 AUTHORS 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 "util/u_vbuf_mgr.h"
+
+#include "util/u_format.h"
+#include "util/u_inlines.h"
+#include "util/u_memory.h"
+#include "util/u_upload_mgr.h"
+#include "translate/translate.h"
+#include "translate/translate_cache.h"
+
+struct u_vbuf_mgr_elements {
+   unsigned count;
+   struct pipe_vertex_element ve[PIPE_MAX_ATTRIBS];
+
+   unsigned src_format_size[PIPE_MAX_ATTRIBS];
+
+   /* If (velem[i].src_format != native_format[i]), the vertex buffer
+    * referenced by the vertex element cannot be used for rendering and
+    * its vertex data must be translated to native_format[i]. */
+   enum pipe_format native_format[PIPE_MAX_ATTRIBS];
+   unsigned native_format_size[PIPE_MAX_ATTRIBS];
+
+   /* This might mean two things:
+    * - src_format != native_format, as discussed above.
+    * - src_offset % 4 != 0 (if the caps don't allow such an offset). */
+   boolean incompatible_layout;
+};
+
+struct u_vbuf_mgr_priv {
+   struct u_vbuf_mgr b;
+   struct pipe_context *pipe;
+
+   struct translate_cache *translate_cache;
+   unsigned translate_vb_slot;
+
+   struct u_vbuf_mgr_elements *ve;
+   void *saved_ve, *fallback_ve;
+   boolean ve_binding_lock;
+
+   unsigned saved_buffer_offset[PIPE_MAX_ATTRIBS];
+
+   boolean any_user_vbs;
+   boolean incompatible_vb_layout;
+};
+
+static void u_vbuf_mgr_init_format_caps(struct u_vbuf_mgr_priv *mgr)
+{
+   struct pipe_screen *screen = mgr->pipe->screen;
+
+   mgr->b.caps.format_fixed32 =
+      screen->is_format_supported(screen, PIPE_FORMAT_R32_FIXED, PIPE_BUFFER,
+                                  0, PIPE_BIND_VERTEX_BUFFER);
+
+   mgr->b.caps.format_float16 =
+      screen->is_format_supported(screen, PIPE_FORMAT_R16_FLOAT, PIPE_BUFFER,
+                                  0, PIPE_BIND_VERTEX_BUFFER);
+
+   mgr->b.caps.format_float64 =
+      screen->is_format_supported(screen, PIPE_FORMAT_R64_FLOAT, PIPE_BUFFER,
+                                  0, PIPE_BIND_VERTEX_BUFFER);
+
+   mgr->b.caps.format_norm32 =
+      screen->is_format_supported(screen, PIPE_FORMAT_R32_UNORM, PIPE_BUFFER,
+                                  0, PIPE_BIND_VERTEX_BUFFER) &&
+      screen->is_format_supported(screen, PIPE_FORMAT_R32_SNORM, PIPE_BUFFER,
+                                  0, PIPE_BIND_VERTEX_BUFFER);
+
+   mgr->b.caps.format_scaled32 =
+      screen->is_format_supported(screen, PIPE_FORMAT_R32_USCALED, PIPE_BUFFER,
+                                  0, PIPE_BIND_VERTEX_BUFFER) &&
+      screen->is_format_supported(screen, PIPE_FORMAT_R32_SSCALED, PIPE_BUFFER,
+                                  0, PIPE_BIND_VERTEX_BUFFER);
+}
+
+struct u_vbuf_mgr *
+u_vbuf_mgr_create(struct pipe_context *pipe,
+                  unsigned upload_buffer_size,
+                  unsigned upload_buffer_alignment,
+                  unsigned upload_buffer_bind,
+                  enum u_fetch_alignment fetch_alignment)
+{
+   struct u_vbuf_mgr_priv *mgr = CALLOC_STRUCT(u_vbuf_mgr_priv);
+
+   mgr->pipe = pipe;
+   mgr->translate_cache = translate_cache_create();
+
+   mgr->b.uploader = u_upload_create(pipe, upload_buffer_size,
+                                     upload_buffer_alignment,
+                                     upload_buffer_bind);
+
+   mgr->b.caps.fetch_dword_unaligned =
+         fetch_alignment == U_VERTEX_FETCH_BYTE_ALIGNED;
+
+   u_vbuf_mgr_init_format_caps(mgr);
+
+   return &mgr->b;
+}
+
+void u_vbuf_mgr_destroy(struct u_vbuf_mgr *mgrb)
+{
+   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
+   unsigned i;
+
+   for (i = 0; i < mgr->b.nr_real_vertex_buffers; i++) {
+      pipe_resource_reference(&mgr->b.vertex_buffer[i].buffer, NULL);
+      pipe_resource_reference(&mgr->b.real_vertex_buffer[i], NULL);
+   }
+
+   translate_cache_destroy(mgr->translate_cache);
+   u_upload_destroy(mgr->b.uploader);
+   FREE(mgr);
+}
+
+
+static enum u_vbuf_return_flags
+u_vbuf_translate_begin(struct u_vbuf_mgr_priv *mgr,
+                       int min_index, int max_index)
+{
+   struct translate_key key;
+   struct translate_element *te;
+   unsigned tr_elem_index[PIPE_MAX_ATTRIBS];
+   struct translate *tr;
+   boolean vb_translated[PIPE_MAX_ATTRIBS] = {0};
+   uint8_t *vb_map[PIPE_MAX_ATTRIBS] = {0}, *out_map;
+   struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {0};
+   struct pipe_resource *out_buffer = NULL;
+   unsigned i, num_verts, out_offset;
+   struct pipe_vertex_element new_velems[PIPE_MAX_ATTRIBS];
+   boolean upload_flushed = FALSE;
+
+   memset(&key, 0, sizeof(key));
+   memset(tr_elem_index, 0xff, sizeof(tr_elem_index));
+
+   /* Initialize the translate key, i.e. the recipe how vertices should be
+     * translated. */
+   memset(&key, 0, sizeof key);
+   for (i = 0; i < mgr->ve->count; i++) {
+      struct pipe_vertex_buffer *vb =
+            &mgr->b.vertex_buffer[mgr->ve->ve[i].vertex_buffer_index];
+      enum pipe_format output_format = mgr->ve->native_format[i];
+      unsigned output_format_size = mgr->ve->native_format_size[i];
+
+      /* Check for support. */
+      if (mgr->ve->ve[i].src_format == mgr->ve->native_format[i] &&
+          (mgr->b.caps.fetch_dword_unaligned ||
+           (vb->buffer_offset % 4 == 0 &&
+            vb->stride % 4 == 0 &&
+            mgr->ve->ve[i].src_offset % 4 == 0))) {
+         continue;
+      }
+
+      /* Workaround for translate: output floats instead of halfs. */
+      switch (output_format) {
+      case PIPE_FORMAT_R16_FLOAT:
+         output_format = PIPE_FORMAT_R32_FLOAT;
+         output_format_size = 4;
+         break;
+      case PIPE_FORMAT_R16G16_FLOAT:
+         output_format = PIPE_FORMAT_R32G32_FLOAT;
+         output_format_size = 8;
+         break;
+      case PIPE_FORMAT_R16G16B16_FLOAT:
+         output_format = PIPE_FORMAT_R32G32B32_FLOAT;
+         output_format_size = 12;
+         break;
+      case PIPE_FORMAT_R16G16B16A16_FLOAT:
+         output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+         output_format_size = 16;
+         break;
+      default:;
+      }
+
+      /* Add this vertex element. */
+      te = &key.element[key.nr_elements];
+      /*te->type;
+        te->instance_divisor;*/
+      te->input_buffer = mgr->ve->ve[i].vertex_buffer_index;
+      te->input_format = mgr->ve->ve[i].src_format;
+      te->input_offset = mgr->ve->ve[i].src_offset;
+      te->output_format = output_format;
+      te->output_offset = key.output_stride;
+
+      key.output_stride += output_format_size;
+      vb_translated[mgr->ve->ve[i].vertex_buffer_index] = TRUE;
+      tr_elem_index[i] = key.nr_elements;
+      key.nr_elements++;
+   }
+
+   /* Get a translate object. */
+   tr = translate_cache_find(mgr->translate_cache, &key);
+
+   /* Map buffers we want to translate. */
+   for (i = 0; i < mgr->b.nr_vertex_buffers; i++) {
+      if (vb_translated[i]) {
+         struct pipe_vertex_buffer *vb = &mgr->b.vertex_buffer[i];
+
+         vb_map[i] = pipe_buffer_map(mgr->pipe, vb->buffer,
+                                     PIPE_TRANSFER_READ, &vb_transfer[i]);
+
+         tr->set_buffer(tr, i,
+                        vb_map[i] + vb->buffer_offset + vb->stride * min_index,
+                        vb->stride, ~0);
+      }
+   }
+
+   /* Create and map the output buffer. */
+   num_verts = max_index + 1 - min_index;
+
+   u_upload_alloc(mgr->b.uploader,
+                  key.output_stride * min_index,
+                  key.output_stride * num_verts,
+                  &out_offset, &out_buffer, &upload_flushed,
+                  (void**)&out_map);
+
+   out_offset -= key.output_stride * min_index;
+
+   /* Translate. */
+   tr->run(tr, 0, num_verts, 0, out_map);
+
+   /* Unmap all buffers. */
+   for (i = 0; i < mgr->b.nr_vertex_buffers; i++) {
+      if (vb_translated[i]) {
+         pipe_buffer_unmap(mgr->pipe, vb_transfer[i]);
+      }
+   }
+
+   /* Setup the new vertex buffer in the first free slot. */
+   mgr->translate_vb_slot = ~0;
+   for (i = 0; i < PIPE_MAX_ATTRIBS; i++) {
+      if (!mgr->b.vertex_buffer[i].buffer) {
+         mgr->translate_vb_slot = i;
+
+         if (i >= mgr->b.nr_vertex_buffers) {
+            mgr->b.nr_real_vertex_buffers = i+1;
+         }
+         break;
+      }
+   }
+
+   if (mgr->translate_vb_slot != ~0) {
+      /* Setup the new vertex buffer. */
+      pipe_resource_reference(
+            &mgr->b.real_vertex_buffer[mgr->translate_vb_slot], out_buffer);
+      mgr->b.vertex_buffer[mgr->translate_vb_slot].buffer_offset = out_offset;
+      mgr->b.vertex_buffer[mgr->translate_vb_slot].stride = key.output_stride;
+
+      /* Setup new vertex elements. */
+      for (i = 0; i < mgr->ve->count; i++) {
+         if (tr_elem_index[i] < key.nr_elements) {
+            te = &key.element[tr_elem_index[i]];
+            new_velems[i].instance_divisor = mgr->ve->ve[i].instance_divisor;
+            new_velems[i].src_format = te->output_format;
+            new_velems[i].src_offset = te->output_offset;
+            new_velems[i].vertex_buffer_index = mgr->translate_vb_slot;
+         } else {
+            memcpy(&new_velems[i], &mgr->ve->ve[i],
+                   sizeof(struct pipe_vertex_element));
+         }
+      }
+
+      mgr->fallback_ve =
+            mgr->pipe->create_vertex_elements_state(mgr->pipe, mgr->ve->count,
+                                                    new_velems);
+
+      /* Preserve saved_ve. */
+      mgr->ve_binding_lock = TRUE;
+      mgr->pipe->bind_vertex_elements_state(mgr->pipe, mgr->fallback_ve);
+      mgr->ve_binding_lock = FALSE;
+   }
+
+   pipe_resource_reference(&out_buffer, NULL);
+
+   return upload_flushed ? U_VBUF_UPLOAD_FLUSHED : 0;
+}
+
+static void u_vbuf_translate_end(struct u_vbuf_mgr_priv *mgr)
+{
+   if (mgr->fallback_ve == NULL) {
+      return;
+   }
+
+   /* Restore vertex elements. */
+   /* Note that saved_ve will be overwritten in bind_vertex_elements_state. */
+   mgr->pipe->bind_vertex_elements_state(mgr->pipe, mgr->saved_ve);
+   mgr->pipe->delete_vertex_elements_state(mgr->pipe, mgr->fallback_ve);
+   mgr->fallback_ve = NULL;
+
+   /* Delete the now-unused VBO. */
+   pipe_resource_reference(&mgr->b.real_vertex_buffer[mgr->translate_vb_slot],
+                           NULL);
+   mgr->b.nr_real_vertex_buffers = mgr->b.nr_vertex_buffers;
+}
+
+#define FORMAT_REPLACE(what, withwhat) \
+    case PIPE_FORMAT_##what: format = PIPE_FORMAT_##withwhat; break
+
+struct u_vbuf_mgr_elements *
+u_vbuf_mgr_create_vertex_elements(struct u_vbuf_mgr *mgrb,
+                                  unsigned count,
+                                  const struct pipe_vertex_element *attribs,
+                                  struct pipe_vertex_element *native_attribs)
+{
+   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
+   unsigned i;
+   struct u_vbuf_mgr_elements *ve = CALLOC_STRUCT(u_vbuf_mgr_elements);
+
+   ve->count = count;
+
+   if (!count) {
+      return ve;
+   }
+
+   memcpy(ve->ve, attribs, sizeof(struct pipe_vertex_element) * count);
+   memcpy(native_attribs, attribs, sizeof(struct pipe_vertex_element) * count);
+
+   /* Set the best native format in case the original format is not
+    * supported. */
+   for (i = 0; i < count; i++) {
+      enum pipe_format format = ve->ve[i].src_format;
+
+      ve->src_format_size[i] = util_format_get_blocksize(format);
+
+      /* Choose a native format.
+       * For now we don't care about the alignment, that's going to
+       * be sorted out later. */
+      if (!mgr->b.caps.format_fixed32) {
+         switch (format) {
+            FORMAT_REPLACE(R32_FIXED,           R32_FLOAT);
+            FORMAT_REPLACE(R32G32_FIXED,        R32G32_FLOAT);
+            FORMAT_REPLACE(R32G32B32_FIXED,     R32G32B32_FLOAT);
+            FORMAT_REPLACE(R32G32B32A32_FIXED,  R32G32B32A32_FLOAT);
+            default:;
+         }
+      }
+      if (!mgr->b.caps.format_float16) {
+         switch (format) {
+            FORMAT_REPLACE(R16_FLOAT,           R32_FLOAT);
+            FORMAT_REPLACE(R16G16_FLOAT,        R32G32_FLOAT);
+            FORMAT_REPLACE(R16G16B16_FLOAT,     R32G32B32_FLOAT);
+            FORMAT_REPLACE(R16G16B16A16_FLOAT,  R32G32B32A32_FLOAT);
+            default:;
+         }
+      }
+      if (!mgr->b.caps.format_float64) {
+         switch (format) {
+            FORMAT_REPLACE(R64_FLOAT,           R32_FLOAT);
+            FORMAT_REPLACE(R64G64_FLOAT,        R32G32_FLOAT);
+            FORMAT_REPLACE(R64G64B64_FLOAT,     R32G32B32_FLOAT);
+            FORMAT_REPLACE(R64G64B64A64_FLOAT,  R32G32B32A32_FLOAT);
+            default:;
+         }
+      }
+      if (!mgr->b.caps.format_norm32) {
+         switch (format) {
+            FORMAT_REPLACE(R32_UNORM,           R32_FLOAT);
+            FORMAT_REPLACE(R32G32_UNORM,        R32G32_FLOAT);
+            FORMAT_REPLACE(R32G32B32_UNORM,     R32G32B32_FLOAT);
+            FORMAT_REPLACE(R32G32B32A32_UNORM,  R32G32B32A32_FLOAT);
+            FORMAT_REPLACE(R32_SNORM,           R32_FLOAT);
+            FORMAT_REPLACE(R32G32_SNORM,        R32G32_FLOAT);
+            FORMAT_REPLACE(R32G32B32_SNORM,     R32G32B32_FLOAT);
+            FORMAT_REPLACE(R32G32B32A32_SNORM,  R32G32B32A32_FLOAT);
+            default:;
+         }
+      }
+      if (!mgr->b.caps.format_scaled32) {
+         switch (format) {
+            FORMAT_REPLACE(R32_USCALED,         R32_FLOAT);
+            FORMAT_REPLACE(R32G32_USCALED,      R32G32_FLOAT);
+            FORMAT_REPLACE(R32G32B32_USCALED,   R32G32B32_FLOAT);
+            FORMAT_REPLACE(R32G32B32A32_USCALED,R32G32B32A32_FLOAT);
+            FORMAT_REPLACE(R32_SSCALED,         R32_FLOAT);
+            FORMAT_REPLACE(R32G32_SSCALED,      R32G32_FLOAT);
+            FORMAT_REPLACE(R32G32B32_SSCALED,   R32G32B32_FLOAT);
+            FORMAT_REPLACE(R32G32B32A32_SSCALED,R32G32B32A32_FLOAT);
+            default:;
+         }
+      }
+
+      native_attribs[i].src_format = format;
+      ve->native_format[i] = format;
+      ve->native_format_size[i] =
+            util_format_get_blocksize(ve->native_format[i]);
+
+      ve->incompatible_layout =
+            ve->incompatible_layout ||
+            ve->ve[i].src_format != ve->native_format[i] ||
+            (!mgr->b.caps.fetch_dword_unaligned && ve->ve[i].src_offset % 4 != 0);
+   }
+
+   /* Align the formats to the size of DWORD if needed. */
+   if (!mgr->b.caps.fetch_dword_unaligned) {
+      for (i = 0; i < count; i++) {
+         ve->native_format_size[i] = align(ve->native_format_size[i], 4);
+      }
+   }
+
+   return ve;
+}
+
+void u_vbuf_mgr_bind_vertex_elements(struct u_vbuf_mgr *mgrb,
+                                     void *cso,
+                                     struct u_vbuf_mgr_elements *ve)
+{
+   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
+
+   if (!cso) {
+      return;
+   }
+
+   if (!mgr->ve_binding_lock) {
+      mgr->saved_ve = cso;
+      mgr->ve = ve;
+   }
+}
+
+void u_vbuf_mgr_destroy_vertex_elements(struct u_vbuf_mgr *mgr,
+                                        struct u_vbuf_mgr_elements *ve)
+{
+   FREE(ve);
+}
+
+void u_vbuf_mgr_set_vertex_buffers(struct u_vbuf_mgr *mgrb,
+                                   unsigned count,
+                                   const struct pipe_vertex_buffer *bufs)
+{
+   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
+   unsigned i;
+
+   mgr->any_user_vbs = FALSE;
+   mgr->incompatible_vb_layout = FALSE;
+
+   if (!mgr->b.caps.fetch_dword_unaligned) {
+      /* Check if the strides and offsets are aligned to the size of DWORD. */
+      for (i = 0; i < count; i++) {
+         if (bufs[i].buffer) {
+            if (bufs[i].stride % 4 != 0 ||
+                bufs[i].buffer_offset % 4 != 0) {
+               mgr->incompatible_vb_layout = TRUE;
+               break;
+            }
+         }
+      }
+   }
+
+   for (i = 0; i < count; i++) {
+      const struct pipe_vertex_buffer *vb = &bufs[i];
+
+      pipe_resource_reference(&mgr->b.vertex_buffer[i].buffer, vb->buffer);
+      pipe_resource_reference(&mgr->b.real_vertex_buffer[i], NULL);
+      mgr->saved_buffer_offset[i] = vb->buffer_offset;
+
+      if (!vb->buffer) {
+         continue;
+      }
+
+      if (u_vbuf_resource(vb->buffer)->user_ptr) {
+         mgr->any_user_vbs = TRUE;
+         continue;
+      }
+
+      pipe_resource_reference(&mgr->b.real_vertex_buffer[i], vb->buffer);
+   }
+
+   for (; i < mgr->b.nr_real_vertex_buffers; i++) {
+      pipe_resource_reference(&mgr->b.vertex_buffer[i].buffer, NULL);
+      pipe_resource_reference(&mgr->b.real_vertex_buffer[i], NULL);
+   }
+
+   memcpy(mgr->b.vertex_buffer, bufs,
+          sizeof(struct pipe_vertex_buffer) * count);
+
+   mgr->b.nr_vertex_buffers = count;
+   mgr->b.nr_real_vertex_buffers = count;
+}
+
+static enum u_vbuf_return_flags
+u_vbuf_upload_buffers(struct u_vbuf_mgr_priv *mgr,
+                      int min_index, int max_index,
+                      unsigned instance_count)
+{
+   unsigned i, nr = mgr->ve->count;
+   unsigned count = max_index + 1 - min_index;
+   boolean uploaded[PIPE_MAX_ATTRIBS] = {0};
+   enum u_vbuf_return_flags retval = 0;
+
+   for (i = 0; i < nr; i++) {
+      unsigned index = mgr->ve->ve[i].vertex_buffer_index;
+      struct pipe_vertex_buffer *vb = &mgr->b.vertex_buffer[index];
+
+      if (vb->buffer &&
+          u_vbuf_resource(vb->buffer)->user_ptr &&
+          !uploaded[index]) {
+         unsigned first, size;
+         boolean flushed;
+         unsigned instance_div = mgr->ve->ve[i].instance_divisor;
+
+         if (instance_div) {
+            first = 0;
+            size = vb->stride *
+                   ((instance_count + instance_div - 1) / instance_div);
+         } else if (vb->stride) {
+            first = vb->stride * min_index;
+            size = vb->stride * count;
+
+            /* Unusual case when stride is smaller than the format size.
+             * XXX This won't work with interleaved arrays. */
+            if (mgr->ve->native_format_size[i] > vb->stride)
+               size += mgr->ve->native_format_size[i] - vb->stride;
+         } else {
+            first = 0;
+            size = mgr->ve->native_format_size[i];
+         }
+
+         u_upload_data(mgr->b.uploader, first, size,
+                       u_vbuf_resource(vb->buffer)->user_ptr + first,
+                       &vb->buffer_offset,
+                       &mgr->b.real_vertex_buffer[index],
+                       &flushed);
+
+         vb->buffer_offset -= first;
+
+         uploaded[index] = TRUE;
+         if (flushed)
+            retval |= U_VBUF_UPLOAD_FLUSHED;
+      } else {
+         assert(mgr->b.real_vertex_buffer[index]);
+      }
+   }
+
+   return retval;
+}
+
+static void u_vbuf_mgr_compute_max_index(struct u_vbuf_mgr_priv *mgr)
+{
+   unsigned i, nr = mgr->ve->count;
+
+   mgr->b.max_index = ~0;
+
+   for (i = 0; i < nr; i++) {
+      struct pipe_vertex_buffer *vb =
+            &mgr->b.vertex_buffer[mgr->ve->ve[i].vertex_buffer_index];
+      int unused;
+      unsigned max_index;
+
+      if (!vb->buffer ||
+          !vb->stride ||
+          u_vbuf_resource(vb->buffer)->user_ptr) {
+         continue;
+      }
+
+      /* How many bytes is unused after the last vertex.
+       * width0 may be "count*stride - unused" and we have to compensate
+       * for that when dividing by stride. */
+      unused = vb->stride -
+               (mgr->ve->ve[i].src_offset + mgr->ve->src_format_size[i]);
+
+      /* If src_offset is greater than stride (which means it's a buffer
+       * offset rather than a vertex offset)... */
+      if (unused < 0) {
+         unused = 0;
+      }
+
+      /* Compute the maximum index for this vertex element. */
+      max_index =
+         (vb->buffer->width0 - vb->buffer_offset + (unsigned)unused) /
+         vb->stride - 1;
+
+      mgr->b.max_index = MIN2(mgr->b.max_index, max_index);
+   }
+}
+
+enum u_vbuf_return_flags
+u_vbuf_mgr_draw_begin(struct u_vbuf_mgr *mgrb,
+                      const struct pipe_draw_info *info)
+{
+   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
+   int min_index, max_index;
+   enum u_vbuf_return_flags retval = 0;
+
+   u_vbuf_mgr_compute_max_index(mgr);
+
+   min_index = info->min_index - info->index_bias;
+   if (info->max_index == ~0) {
+      max_index = mgr->b.max_index;
+   } else {
+      max_index = MIN2(info->max_index - info->index_bias, mgr->b.max_index);
+   }
+
+   /* Translate vertices with non-native layouts or formats. */
+   if (mgr->incompatible_vb_layout || mgr->ve->incompatible_layout) {
+      retval |= u_vbuf_translate_begin(mgr, min_index, max_index);
+
+      if (mgr->fallback_ve) {
+         retval |= U_VBUF_BUFFERS_UPDATED;
+      }
+   }
+
+   /* Upload user buffers. */
+   if (mgr->any_user_vbs) {
+      retval |= u_vbuf_upload_buffers(mgr, min_index, max_index,
+                                      info->instance_count);
+      retval |= U_VBUF_BUFFERS_UPDATED;
+   }
+   return retval;
+}
+
+void u_vbuf_mgr_draw_end(struct u_vbuf_mgr *mgrb)
+{
+   struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
+   unsigned i;
+
+   /* buffer offsets were modified in u_vbuf_upload_buffers */
+   if (mgr->any_user_vbs) {
+      for (i = 0; i < mgr->b.nr_vertex_buffers; i++)
+         mgr->b.vertex_buffer[i].buffer_offset = mgr->saved_buffer_offset[i];
+   }
+
+   if (mgr->fallback_ve) {
+      u_vbuf_translate_end(mgr);
+   }
+}