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_inlines.h"
  27 #include "pipe/p_defines.h"
  28 #include "util/u_math.h"
  29 #include "util/u_memory.h"
  30 #include "tgsi/tgsi_parse.h"
  31
  32 #include "svga_screen.h"
  33 #include "svga_screen_buffer.h"
  34 #include "svga_context.h"
  35
  36
  37 static void svga_set_vertex_buffers(struct pipe_context *pipe,
  38                                     unsigned count,
  39                                     const struct pipe_vertex_buffer *buffers)
  40 {
  41    struct svga_context *svga = svga_context(pipe);
  42    unsigned i;
  43    boolean any_user_buffer = FALSE;
  44
  45    /* Check for no change */
  46    if (count == svga->curr.num_vertex_buffers &&
  47        memcmp(svga->curr.vb, buffers, count * sizeof buffers[0]) == 0)
  48       return;
  49
  50    /* Adjust refcounts */
  51    for (i = 0; i < count; i++) {
  52       pipe_buffer_reference(&svga->curr.vb[i].buffer, buffers[i].buffer);
  53       if (svga_buffer_is_user_buffer(buffers[i].buffer))
  54          any_user_buffer = TRUE;
  55    }
  56
  57    for ( ; i < svga->curr.num_vertex_buffers; i++)
  58       pipe_buffer_reference(&svga->curr.vb[i].buffer, NULL);
  59
  60    /* Copy remaining data */
  61    memcpy(svga->curr.vb, buffers, count * sizeof buffers[0]);
  62    svga->curr.num_vertex_buffers = count;
  63    svga->curr.any_user_vertex_buffers = any_user_buffer;
  64
  65    svga->dirty |= SVGA_NEW_VBUFFER;
  66 }
  67
  68
  69 static void *
  70 svga_create_vertex_elements_state(struct pipe_context *pipe,
  71                                   unsigned count,
  72                                   const struct pipe_vertex_element *attribs)
  73 {
  74    struct svga_velems_state *velems;
  75    assert(count <= PIPE_MAX_ATTRIBS);
  76    velems = (struct svga_velems_state *) MALLOC(sizeof(struct svga_velems_state));
  77    if (velems) {
  78       velems->count = count;
  79       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
  80    }
  81    return velems;
  82 }
  83
  84 static void svga_bind_vertex_elements_state(struct pipe_context *pipe,
  85                                             void *velems)
  86 {
  87    struct svga_context *svga = svga_context(pipe);
  88    struct svga_velems_state *svga_velems = (struct svga_velems_state *) velems;
  89
  90    svga->curr.velems = svga_velems;
  91    svga->dirty |= SVGA_NEW_VELEMENT;
  92 }
  93
  94 static void svga_delete_vertex_elements_state(struct pipe_context *pipe,
  95                                               void *velems)
  96 {
  97    FREE(velems);
  98 }
  99
 100 void svga_cleanup_vertex_state( struct svga_context *svga )
 101 {
 102    unsigned i;
 103
 104    for (i = 0 ; i < svga->curr.num_vertex_buffers; i++)
 105       pipe_buffer_reference(&svga->curr.vb[i].buffer, NULL);
 106 }
 107
 108
 109 void svga_init_vertex_functions( struct svga_context *svga )
 110 {
 111    svga->pipe.set_vertex_buffers = svga_set_vertex_buffers;
 112    svga->pipe.create_vertex_elements_state = svga_create_vertex_elements_state;
 113    svga->pipe.bind_vertex_elements_state = svga_bind_vertex_elements_state;
 114    svga->pipe.delete_vertex_elements_state = svga_delete_vertex_elements_state;
 115 }
 116
 117