src/gallium/drivers/llvmpipe/lp_state_so.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "lp_context.h"
  29 #include "lp_state.h"
  30 #include "lp_texture.h"
  31
  32 #include "util/u_memory.h"
  33 #include "draw/draw_context.h"
  34
  35
  36 static void *
  37 llvmpipe_create_stream_output_state(struct pipe_context *pipe,
  38                                     const struct pipe_stream_output_info *templ)
  39 {
  40    struct lp_so_state *so;
  41    so = (struct lp_so_state *) CALLOC_STRUCT(lp_so_state);
  42
  43    if (so) {
  44       so->base.num_outputs = templ->num_outputs;
  45       so->base.stride = templ->stride;
  46       memcpy(so->base.output, templ->output,
  47              templ->num_outputs * sizeof(templ->output[0]));
  48    }
  49    return so;
  50 }
  51
  52 static void
  53 llvmpipe_bind_stream_output_state(struct pipe_context *pipe,
  54                                   void *so)
  55 {
  56    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  57    struct lp_so_state *lp_so = (struct lp_so_state *) so;
  58
  59    lp->so = lp_so;
  60
  61    lp->dirty |= LP_NEW_SO;
  62
  63    if (lp_so)
  64       draw_set_so_state(lp->draw, &lp_so->base);
  65 }
  66
  67 static void
  68 llvmpipe_delete_stream_output_state(struct pipe_context *pipe, void *so)
  69 {
  70    FREE( so );
  71 }
  72
  73 static void
  74 llvmpipe_set_stream_output_buffers(struct pipe_context *pipe,
  75                                    struct pipe_resource **buffers,
  76                                    int *offsets,
  77                                    int num_buffers)
  78 {
  79    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  80    int i;
  81    void *map_buffers[PIPE_MAX_SO_BUFFERS];
  82
  83    assert(num_buffers <= PIPE_MAX_SO_BUFFERS);
  84    if (num_buffers > PIPE_MAX_SO_BUFFERS)
  85       num_buffers = PIPE_MAX_SO_BUFFERS;
  86
  87    lp->dirty |= LP_NEW_SO_BUFFERS;
  88
  89    for (i = 0; i < num_buffers; ++i) {
  90       void *mapped;
  91       struct llvmpipe_resource *res = llvmpipe_resource(buffers[i]);
  92
  93       if (!res) {
  94          /* the whole call is invalid, bail out */
  95          lp->so_target.num_buffers = 0;
  96          draw_set_mapped_so_buffers(lp->draw, 0, 0);
  97          return;
  98       }
  99
 100       lp->so_target.buffer[i] = res;
 101       lp->so_target.offset[i] = offsets[i];
 102       lp->so_target.so_count[i] = 0;
 103
 104       mapped = res->data;
 105       if (offsets[i] >= 0)
 106          map_buffers[i] = ((char*)mapped) + offsets[i];
 107       else {
 108          /* this is a buffer append */
 109          assert(!"appending not implemented");
 110          map_buffers[i] = mapped;
 111       }
 112    }
 113    lp->so_target.num_buffers = num_buffers;
 114
 115    draw_set_mapped_so_buffers(lp->draw, map_buffers, num_buffers);
 116 }
 117
 118 void
 119 llvmpipe_init_so_funcs(struct llvmpipe_context *llvmpipe)
 120 {
 121 #if 0
 122    llvmpipe->pipe.create_stream_output_state =
 123       llvmpipe_create_stream_output_state;
 124    llvmpipe->pipe.bind_stream_output_state =
 125       llvmpipe_bind_stream_output_state;
 126    llvmpipe->pipe.delete_stream_output_state =
 127       llvmpipe_delete_stream_output_state;
 128
 129    llvmpipe->pipe.set_stream_output_buffers =
 130       llvmpipe_set_stream_output_buffers;
 131 #else
 132    (void) llvmpipe_create_stream_output_state;
 133    (void) llvmpipe_bind_stream_output_state;
 134    (void) llvmpipe_delete_stream_output_state;
 135    (void) llvmpipe_set_stream_output_buffers;
 136 #endif
 137 }