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
   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
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  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_format.h"
  33 #include "util/u_memory.h"
  34 #include "draw/draw_context.h"
  35
  36
  37 static void *
  38 llvmpipe_create_stream_output_state(struct pipe_context *pipe,
  39                                     const struct pipe_stream_output_state *templ)
  40 {
  41    struct lp_so_state *so;
  42    so = (struct lp_so_state *) CALLOC_STRUCT(lp_so_state);
  43
  44    if (so) {
  45       so->base.num_outputs = templ->num_outputs;
  46       so->base.stride = templ->stride;
  47       memcpy(so->base.output_buffer,
  48              templ->output_buffer,
  49              sizeof(int) * templ->num_outputs);
  50       memcpy(so->base.register_index,
  51              templ->register_index,
  52              sizeof(int) * templ->num_outputs);
  53       memcpy(so->base.register_mask,
  54              templ->register_mask,
  55              sizeof(ubyte) * templ->num_outputs);
  56    }
  57    return so;
  58 }
  59
  60 static void
  61 llvmpipe_bind_stream_output_state(struct pipe_context *pipe,
  62                                   void *so)
  63 {
  64    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  65    struct lp_so_state *lp_so = (struct lp_so_state *) so;
  66
  67    lp->so = lp_so;
  68
  69    lp->dirty |= LP_NEW_SO;
  70
  71    if (lp_so)
  72       draw_set_so_state(lp->draw, &lp_so->base);
  73 }
  74
  75 static void
  76 llvmpipe_delete_stream_output_state(struct pipe_context *pipe, void *so)
  77 {
  78    FREE( so );
  79 }
  80
  81 static void
  82 llvmpipe_set_stream_output_buffers(struct pipe_context *pipe,
  83                                    struct pipe_resource **buffers,
  84                                    int *offsets,
  85                                    int num_buffers)
  86 {
  87    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  88    int i;
  89    void *map_buffers[PIPE_MAX_SO_BUFFERS];
  90
  91    assert(num_buffers <= PIPE_MAX_SO_BUFFERS);
  92    if (num_buffers > PIPE_MAX_SO_BUFFERS)
  93       num_buffers = PIPE_MAX_SO_BUFFERS;
  94
  95    lp->dirty |= LP_NEW_SO_BUFFERS;
  96
  97    for (i = 0; i < num_buffers; ++i) {
  98       void *mapped;
  99       struct llvmpipe_resource *res = llvmpipe_resource(buffers[i]);
 100
 101       if (!res) {
 102          /* the whole call is invalid, bail out */
 103          lp->so_target.num_buffers = 0;
 104          draw_set_mapped_so_buffers(lp->draw, 0, 0);
 105          return;
 106       }
 107
 108       lp->so_target.buffer[i] = res;
 109       lp->so_target.offset[i] = offsets[i];
 110       lp->so_target.so_count[i] = 0;
 111
 112       mapped = res->data;
 113       if (offsets[i] >= 0)
 114          map_buffers[i] = ((char*)mapped) + offsets[i];
 115       else {
 116          /* this is a buffer append */
 117          assert(!"appending not implemented");
 118          map_buffers[i] = mapped;
 119       }
 120    }
 121    lp->so_target.num_buffers = num_buffers;
 122
 123    draw_set_mapped_so_buffers(lp->draw, map_buffers, num_buffers);
 124 }
 125
 126 void
 127 llvmpipe_init_so_funcs(struct llvmpipe_context *llvmpipe)
 128 {
 129    llvmpipe->pipe.create_stream_output_state =
 130       llvmpipe_create_stream_output_state;
 131    llvmpipe->pipe.bind_stream_output_state =
 132       llvmpipe_bind_stream_output_state;
 133    llvmpipe->pipe.delete_stream_output_state =
 134       llvmpipe_delete_stream_output_state;
 135
 136    llvmpipe->pipe.set_stream_output_buffers =
 137       llvmpipe_set_stream_output_buffers;
 138 }