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 "tgsi/tgsi_parse.h"
  30
  31 #include "svga_screen.h"
  32 #include "svga_screen_buffer.h"
  33 #include "svga_context.h"
  34
  35
  36 static void svga_set_vertex_buffers(struct pipe_context *pipe,
  37                                     unsigned count,
  38                                     const struct pipe_vertex_buffer *buffers)
  39 {
  40    struct svga_context *svga = svga_context(pipe);
  41    unsigned i;
  42    boolean any_user_buffer = FALSE;
  43
  44    /* Check for no change */
  45    if (count == svga->curr.num_vertex_buffers &&
  46        memcmp(svga->curr.vb, buffers, count * sizeof buffers[0]) == 0)
  47       return;
  48
  49    /* Adjust refcounts */
  50    for (i = 0; i < count; i++) {
  51       pipe_buffer_reference(&svga->curr.vb[i].buffer, buffers[i].buffer);
  52       if (svga_buffer_is_user_buffer(buffers[i].buffer))
  53          any_user_buffer = TRUE;
  54    }
  55
  56    for ( ; i < svga->curr.num_vertex_buffers; i++)
  57       pipe_buffer_reference(&svga->curr.vb[i].buffer, NULL);
  58
  59    /* Copy remaining data */
  60    memcpy(svga->curr.vb, buffers, count * sizeof buffers[0]);
  61    svga->curr.num_vertex_buffers = count;
  62    svga->curr.any_user_vertex_buffers = any_user_buffer;
  63
  64    svga->dirty |= SVGA_NEW_VBUFFER;
  65 }
  66
  67 static void svga_set_vertex_elements(struct pipe_context *pipe,
  68                                      unsigned count,
  69                                      const struct pipe_vertex_element *elements)
  70 {
  71    struct svga_context *svga = svga_context(pipe);
  72    unsigned i;
  73
  74    for (i = 0; i < count; i++)
  75       svga->curr.ve[i] = elements[i];
  76
  77    svga->curr.num_vertex_elements = count;
  78    svga->dirty |= SVGA_NEW_VELEMENT;
  79 }
  80
  81
  82 void svga_cleanup_vertex_state( struct svga_context *svga )
  83 {
  84    unsigned i;
  85
  86    for (i = 0 ; i < svga->curr.num_vertex_buffers; i++)
  87       pipe_buffer_reference(&svga->curr.vb[i].buffer, NULL);
  88 }
  89
  90
  91 void svga_init_vertex_functions( struct svga_context *svga )
  92 {
  93    svga->pipe.set_vertex_buffers = svga_set_vertex_buffers;
  94    svga->pipe.set_vertex_elements = svga_set_vertex_elements;
  95 }
  96
  97