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 "util/u_transfer.h"
  31 #include "tgsi/tgsi_parse.h"
  32
  33 #include "svga_screen.h"
  34 #include "svga_resource_buffer.h"
  35 #include "svga_context.h"
  36
  37
  38 static void svga_set_vertex_buffers(struct pipe_context *pipe,
  39                                     unsigned count,
  40                                     const struct pipe_vertex_buffer *buffers)
  41 {
  42    struct svga_context *svga = svga_context(pipe);
  43    unsigned i;
  44    boolean any_user_buffer = FALSE;
  45
  46    /* Check for no change */
  47    if (count == svga->curr.num_vertex_buffers &&
  48        memcmp(svga->curr.vb, buffers, count * sizeof buffers[0]) == 0)
  49       return;
  50
  51    /* Adjust refcounts */
  52    for (i = 0; i < count; i++) {
  53       pipe_resource_reference(&svga->curr.vb[i].buffer, buffers[i].buffer);
  54       if (svga_buffer_is_user_buffer(buffers[i].buffer))
  55          any_user_buffer = TRUE;
  56    }
  57
  58    for ( ; i < svga->curr.num_vertex_buffers; i++)
  59       pipe_resource_reference(&svga->curr.vb[i].buffer, NULL);
  60
  61    /* Copy remaining data */
  62    memcpy(svga->curr.vb, buffers, count * sizeof buffers[0]);
  63    svga->curr.num_vertex_buffers = count;
  64    svga->curr.any_user_vertex_buffers = any_user_buffer;
  65
  66    svga->dirty |= SVGA_NEW_VBUFFER;
  67 }
  68
  69
  70 static void svga_set_index_buffer(struct pipe_context *pipe,
  71                                   const struct pipe_index_buffer *ib)
  72 {
  73    struct svga_context *svga = svga_context(pipe);
  74
  75    if (ib) {
  76       pipe_resource_reference(&svga->curr.ib.buffer, ib->buffer);
  77       memcpy(&svga->curr.ib, ib, sizeof(svga->curr.ib));
  78    }
  79    else {
  80       pipe_resource_reference(&svga->curr.ib.buffer, NULL);
  81       memset(&svga->curr.ib, 0, sizeof(svga->curr.ib));
  82    }
  83
  84    /* TODO make this more like a state */
  85 }
  86
  87
  88 static void *
  89 svga_create_vertex_elements_state(struct pipe_context *pipe,
  90                                   unsigned count,
  91                                   const struct pipe_vertex_element *attribs)
  92 {
  93    struct svga_velems_state *velems;
  94    assert(count <= PIPE_MAX_ATTRIBS);
  95    velems = (struct svga_velems_state *) MALLOC(sizeof(struct svga_velems_state));
  96    if (velems) {
  97       velems->count = count;
  98       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
  99    }
 100    return velems;
 101 }
 102
 103 static void svga_bind_vertex_elements_state(struct pipe_context *pipe,
 104                                             void *velems)
 105 {
 106    struct svga_context *svga = svga_context(pipe);
 107    struct svga_velems_state *svga_velems = (struct svga_velems_state *) velems;
 108
 109    svga->curr.velems = svga_velems;
 110    svga->dirty |= SVGA_NEW_VELEMENT;
 111 }
 112
 113 static void svga_delete_vertex_elements_state(struct pipe_context *pipe,
 114                                               void *velems)
 115 {
 116    FREE(velems);
 117 }
 118
 119 void svga_cleanup_vertex_state( struct svga_context *svga )
 120 {
 121    unsigned i;
 122
 123    for (i = 0 ; i < svga->curr.num_vertex_buffers; i++)
 124       pipe_resource_reference(&svga->curr.vb[i].buffer, NULL);
 125 }
 126
 127
 128 void svga_init_vertex_functions( struct svga_context *svga )
 129 {
 130    svga->pipe.set_vertex_buffers = svga_set_vertex_buffers;
 131    svga->pipe.set_index_buffer = svga_set_index_buffer;
 132    svga->pipe.create_vertex_elements_state = svga_create_vertex_elements_state;
 133    svga->pipe.bind_vertex_elements_state = svga_bind_vertex_elements_state;
 134    svga->pipe.delete_vertex_elements_state = svga_delete_vertex_elements_state;
 135 }
 136
 137