src/gallium/drivers/svga/svga_pipe_vertex.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "util/u_helpers.h"
  27 #include "util/u_inlines.h"
  28 #include "pipe/p_defines.h"
  29 #include "util/u_math.h"
  30 #include "util/u_memory.h"
  31 #include "util/u_transfer.h"
  32 #include "tgsi/tgsi_parse.h"
  33
  34 #include "svga_screen.h"
  35 #include "svga_resource_buffer.h"
  36 #include "svga_context.h"
  37
  38
  39 static void svga_set_vertex_buffers(struct pipe_context *pipe,
  40                                     unsigned start_slot, unsigned count,
  41                                     const struct pipe_vertex_buffer *buffers)
  42 {
  43    struct svga_context *svga = svga_context(pipe);
  44
  45    util_set_vertex_buffers_count(svga->curr.vb,
  46                                  &svga->curr.num_vertex_buffers,
  47                                  buffers, start_slot, count);
  48
  49    svga->dirty |= SVGA_NEW_VBUFFER;
  50 }
  51
  52
  53 static void svga_set_index_buffer(struct pipe_context *pipe,
  54                                   const struct pipe_index_buffer *ib)
  55 {
  56    struct svga_context *svga = svga_context(pipe);
  57
  58    if (ib) {
  59       pipe_resource_reference(&svga->curr.ib.buffer, ib->buffer);
  60       memcpy(&svga->curr.ib, ib, sizeof(svga->curr.ib));
  61    }
  62    else {
  63       pipe_resource_reference(&svga->curr.ib.buffer, NULL);
  64       memset(&svga->curr.ib, 0, sizeof(svga->curr.ib));
  65    }
  66
  67    /* TODO make this more like a state */
  68 }
  69
  70
  71 static void *
  72 svga_create_vertex_elements_state(struct pipe_context *pipe,
  73                                   unsigned count,
  74                                   const struct pipe_vertex_element *attribs)
  75 {
  76    struct svga_velems_state *velems;
  77    assert(count <= PIPE_MAX_ATTRIBS);
  78    velems = (struct svga_velems_state *) MALLOC(sizeof(struct svga_velems_state));
  79    if (velems) {
  80       velems->count = count;
  81       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
  82    }
  83    return velems;
  84 }
  85
  86 static void svga_bind_vertex_elements_state(struct pipe_context *pipe,
  87                                             void *velems)
  88 {
  89    struct svga_context *svga = svga_context(pipe);
  90    struct svga_velems_state *svga_velems = (struct svga_velems_state *) velems;
  91
  92    svga->curr.velems = svga_velems;
  93    svga->dirty |= SVGA_NEW_VELEMENT;
  94 }
  95
  96 static void svga_delete_vertex_elements_state(struct pipe_context *pipe,
  97                                               void *velems)
  98 {
  99    FREE(velems);
 100 }
 101
 102 void svga_cleanup_vertex_state( struct svga_context *svga )
 103 {
 104    unsigned i;
 105
 106    for (i = 0 ; i < svga->curr.num_vertex_buffers; i++)
 107       pipe_resource_reference(&svga->curr.vb[i].buffer, NULL);
 108 }
 109
 110
 111 void svga_init_vertex_functions( struct svga_context *svga )
 112 {
 113    svga->pipe.set_vertex_buffers = svga_set_vertex_buffers;
 114    svga->pipe.set_index_buffer = svga_set_index_buffer;
 115    svga->pipe.create_vertex_elements_state = svga_create_vertex_elements_state;
 116    svga->pipe.bind_vertex_elements_state = svga_bind_vertex_elements_state;
 117    svga->pipe.delete_vertex_elements_state = svga_delete_vertex_elements_state;
 118 }
 119
 120