1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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/* Author:
29 *    Brian Paul
30 *    Keith Whitwell
31 */
32
33
34#include "pipe/p_defines.h"
35#include "pipe/p_context.h"
36#include "util/u_inlines.h"
37#include "util/u_prim.h"
38
39#include "sp_context.h"
40#include "sp_query.h"
41#include "sp_state.h"
42#include "sp_texture.h"
43
44#include "draw/draw_context.h"
45
46/**
47 * This function handles drawing indexed and non-indexed prims,
48 * instanced and non-instanced drawing, with or without min/max element
49 * indexes.
50 * All the other drawing functions are expressed in terms of this
51 * function.
52 *
53 * For non-indexed prims, indexBuffer should be NULL.
54 * For non-instanced drawing, instanceCount should be 1.
55 * When the min/max element indexes aren't known, minIndex should be 0
56 * and maxIndex should be ~0.
57 */
58void
59softpipe_draw_vbo(struct pipe_context *pipe,
60                  const struct pipe_draw_info *info)
61{
62   struct softpipe_context *sp = softpipe_context(pipe);
63   struct draw_context *draw = sp->draw;
64   const void *mapped_indices = NULL;
65   unsigned i;
66
67   if (!softpipe_check_render_cond(sp))
68      return;
69
70   sp->reduced_api_prim = u_reduced_prim(info->mode);
71
72   if (sp->dirty) {
73      softpipe_update_derived(sp, sp->reduced_api_prim);
74   }
75
76   softpipe_map_transfers(sp);
77
78   /* Map vertex buffers */
79   for (i = 0; i < sp->num_vertex_buffers; i++) {
80      const void *buf = sp->vertex_buffer[i].user_buffer;
81      if (!buf)
82         buf = softpipe_resource(sp->vertex_buffer[i].buffer)->data;
83      draw_set_mapped_vertex_buffer(draw, i, buf);
84   }
85
86   /* Map index buffer, if present */
87   if (info->indexed) {
88      mapped_indices = sp->index_buffer.user_buffer;
89      if (!mapped_indices)
90         mapped_indices = softpipe_resource(sp->index_buffer.buffer)->data;
91
92      draw_set_indexes(draw,
93                       (ubyte *) mapped_indices + sp->index_buffer.offset,
94                       sp->index_buffer.index_size);
95   }
96
97
98   for (i = 0; i < sp->num_so_targets; i++) {
99      void *buf = softpipe_resource(sp->so_targets[i]->target.buffer)->data;
100      sp->so_targets[i]->mapping = buf;
101   }
102
103   draw_set_mapped_so_targets(draw, sp->num_so_targets,
104                              sp->so_targets);
105
106   /* draw! */
107   draw_vbo(draw, info);
108
109   /* unmap vertex/index buffers - will cause draw module to flush */
110   for (i = 0; i < sp->num_vertex_buffers; i++) {
111      draw_set_mapped_vertex_buffer(draw, i, NULL);
112   }
113   if (mapped_indices) {
114      draw_set_indexes(draw, NULL, 0);
115   }
116
117   draw_set_mapped_so_targets(draw, 0, NULL);
118
119   /*
120    * TODO: Flush only when a user vertex/index buffer is present
121    * (or even better, modify draw module to do this
122    * internally when this condition is seen?)
123    */
124   draw_flush(draw);
125
126   /* Note: leave drawing surfaces mapped */
127   sp->dirty_render_cache = TRUE;
128}
129