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
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
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
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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
35static struct pipe_stream_output_target *
36llvmpipe_create_so_target(struct pipe_context *pipe,
37                          struct pipe_resource *buffer,
38                          unsigned buffer_offset,
39                          unsigned buffer_size)
40{
41   struct draw_so_target *t;
42
43   t = CALLOC_STRUCT(draw_so_target);
44   if (!t)
45      return NULL;
46
47   t->target.context = pipe;
48   t->target.reference.count = 1;
49   pipe_resource_reference(&t->target.buffer, buffer);
50   t->target.buffer_offset = buffer_offset;
51   t->target.buffer_size = buffer_size;
52   return &t->target;
53}
54
55static void
56llvmpipe_so_target_destroy(struct pipe_context *pipe,
57                           struct pipe_stream_output_target *target)
58{
59   pipe_resource_reference(&target->buffer, NULL);
60   FREE(target);
61}
62
63static void
64llvmpipe_set_so_targets(struct pipe_context *pipe,
65                        unsigned num_targets,
66                        struct pipe_stream_output_target **targets,
67                        const unsigned *offsets)
68{
69   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
70   int i;
71   for (i = 0; i < num_targets; i++) {
72      const boolean append = (offsets[i] == (unsigned)-1);
73      /*
74       * Warn if the so target was created in another context.
75       * XXX Not entirely sure if mesa/st may rely on this?
76       * Otherwise should just assert.
77       */
78      if (targets[i] && targets[i]->context != pipe) {
79         debug_printf("Illegal setting of so target with target %d created in "
80                       "another context\n", i);
81      }
82      pipe_so_target_reference((struct pipe_stream_output_target **)&llvmpipe->so_targets[i], targets[i]);
83      /* If we're not appending then lets set the internal
84         offset to what was requested */
85      if (!append && llvmpipe->so_targets[i]) {
86         llvmpipe->so_targets[i]->internal_offset = offsets[i];
87      }
88   }
89
90   for (; i < llvmpipe->num_so_targets; i++) {
91      pipe_so_target_reference((struct pipe_stream_output_target **)&llvmpipe->so_targets[i], NULL);
92   }
93   llvmpipe->num_so_targets = num_targets;
94}
95
96void
97llvmpipe_init_so_funcs(struct llvmpipe_context *pipe)
98{
99   pipe->pipe.create_stream_output_target = llvmpipe_create_so_target;
100   pipe->pipe.stream_output_target_destroy = llvmpipe_so_target_destroy;
101   pipe->pipe.set_stream_output_targets = llvmpipe_set_so_targets;
102}
103