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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  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 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                         unsigned append_bitmask)
  68 {
  69    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  70    int i;
  71    for (i = 0; i < num_targets; i++) {
  72       pipe_so_target_reference((struct pipe_stream_output_target **)&llvmpipe->so_targets[i], targets[i]);
  73    }
  74
  75    for (; i < llvmpipe->num_so_targets; i++) {
  76       pipe_so_target_reference((struct pipe_stream_output_target **)&llvmpipe->so_targets[i], NULL);
  77    }
  78
  79    llvmpipe->so_append_bitmask = append_bitmask;
  80    llvmpipe->num_so_targets = num_targets;
  81 }
  82
  83 void
  84 llvmpipe_init_so_funcs(struct llvmpipe_context *pipe)
  85 {
  86    pipe->pipe.create_stream_output_target = llvmpipe_create_so_target;
  87    pipe->pipe.stream_output_target_destroy = llvmpipe_so_target_destroy;
  88    pipe->pipe.set_stream_output_targets = llvmpipe_set_so_targets;
  89 }