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  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 TUNGSTEN GRAPHICS 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 "sp_context.h"
  29. #include "sp_state.h"
  30. #include "sp_texture.h"
  31.  
  32. #include "util/u_format.h"
  33. #include "util/u_memory.h"
  34. #include "draw/draw_context.h"
  35. #include "pipebuffer/pb_buffer.h"
  36.  
  37. static struct pipe_stream_output_target *
  38. softpipe_create_so_target(struct pipe_context *pipe,
  39.                           struct pipe_resource *buffer,
  40.                           unsigned buffer_offset,
  41.                           unsigned buffer_size)
  42. {
  43.    struct draw_so_target *t;
  44.  
  45.    t = CALLOC_STRUCT(draw_so_target);
  46.    t->target.context = pipe;
  47.    t->target.reference.count = 1;
  48.    pipe_resource_reference(&t->target.buffer, buffer);
  49.    t->target.buffer_offset = buffer_offset;
  50.    t->target.buffer_size = buffer_size;
  51.    return &t->target;
  52. }
  53.  
  54. static void
  55. softpipe_so_target_destroy(struct pipe_context *pipe,
  56.                            struct pipe_stream_output_target *target)
  57. {
  58.    pipe_resource_reference(&target->buffer, NULL);
  59.    FREE(target);
  60. }
  61.  
  62. static void
  63. softpipe_set_so_targets(struct pipe_context *pipe,
  64.                         unsigned num_targets,
  65.                         struct pipe_stream_output_target **targets,
  66.                         unsigned append_bitmask)
  67. {
  68.    struct softpipe_context *softpipe = softpipe_context(pipe);
  69.    unsigned i;
  70.  
  71.    for (i = 0; i < num_targets; i++) {
  72.       pipe_so_target_reference((struct pipe_stream_output_target **)&softpipe->so_targets[i], targets[i]);
  73.    }
  74.  
  75.    for (; i < softpipe->num_so_targets; i++) {
  76.       pipe_so_target_reference((struct pipe_stream_output_target **)&softpipe->so_targets[i], NULL);
  77.    }
  78.  
  79.    softpipe->num_so_targets = num_targets;
  80. }
  81.  
  82. void
  83. softpipe_init_streamout_funcs(struct pipe_context *pipe)
  84. {
  85.    pipe->create_stream_output_target = softpipe_create_so_target;
  86.    pipe->stream_output_target_destroy = softpipe_so_target_destroy;
  87.    pipe->set_stream_output_targets = softpipe_set_so_targets;
  88. }
  89.  
  90.