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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 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 "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                         const unsigned *offsets)
     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