src/gallium/drivers/llvmpipe/lp_state_so.c

   1 /**************************************************************************
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   3  * Copyright 2010 VMware, Inc.
   4  * All Rights Reserved.
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  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.
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  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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  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 static struct pipe_stream_output_target *
  36 llvmpipe_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
  55 static void
  56 llvmpipe_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
  63 static void
  64 llvmpipe_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       if (targets[i]) {
  90          void *buf = llvmpipe_resource(targets[i]->buffer)->data;
  91          llvmpipe->so_targets[i]->mapping = buf;
  92       }
  93    }
  94
  95    for (; i < llvmpipe->num_so_targets; i++) {
  96       pipe_so_target_reference((struct pipe_stream_output_target **)&llvmpipe->so_targets[i], NULL);
  97    }
  98    llvmpipe->num_so_targets = num_targets;
  99
 100    draw_set_mapped_so_targets(llvmpipe->draw, llvmpipe->num_so_targets,
 101                               llvmpipe->so_targets);
 102 }
 103
 104 void
 105 llvmpipe_init_so_funcs(struct llvmpipe_context *pipe)
 106 {
 107    pipe->pipe.create_stream_output_target = llvmpipe_create_so_target;
 108    pipe->pipe.stream_output_target_destroy = llvmpipe_so_target_destroy;
 109    pipe->pipe.set_stream_output_targets = llvmpipe_set_so_targets;
 110 }