1/**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
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 VMWARE 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_draw.h"
37#include "util/u_prim.h"
38
39#include "lp_context.h"
40#include "lp_state.h"
41#include "lp_query.h"
42
43#include "draw/draw_context.h"
44
45
46
47/**
48 * Draw vertex arrays, with optional indexing, optional instancing.
49 * All the other drawing functions are implemented in terms of this function.
50 * Basically, map the vertex buffers (and drawing surfaces), then hand off
51 * the drawing to the 'draw' module.
52 */
53static void
54llvmpipe_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
55{
56   struct llvmpipe_context *lp = llvmpipe_context(pipe);
57   struct draw_context *draw = lp->draw;
58   const void *mapped_indices = NULL;
59   unsigned i;
60
61   if (!llvmpipe_check_render_cond(lp))
62      return;
63
64   if (info->indirect) {
65      util_draw_indirect(pipe, info);
66      return;
67   }
68
69   if (lp->dirty)
70      llvmpipe_update_derived( lp );
71
72   /*
73    * Map vertex buffers
74    */
75   for (i = 0; i < lp->num_vertex_buffers; i++) {
76      const void *buf = lp->vertex_buffer[i].is_user_buffer ?
77                           lp->vertex_buffer[i].buffer.user : NULL;
78      size_t size = ~0;
79      if (!buf) {
80         if (!lp->vertex_buffer[i].buffer.resource) {
81            continue;
82         }
83         buf = llvmpipe_resource_data(lp->vertex_buffer[i].buffer.resource);
84         size = lp->vertex_buffer[i].buffer.resource->width0;
85      }
86      draw_set_mapped_vertex_buffer(draw, i, buf, size);
87   }
88
89   /* Map index buffer, if present */
90   if (info->index_size) {
91      unsigned available_space = ~0;
92      mapped_indices = info->has_user_indices ? info->index.user : NULL;
93      if (!mapped_indices) {
94         mapped_indices = llvmpipe_resource_data(info->index.resource);
95         available_space = info->index.resource->width0;
96      }
97      draw_set_indexes(draw,
98                       (ubyte *) mapped_indices,
99                       info->index_size, available_space);
100   }
101
102   for (i = 0; i < lp->num_so_targets; i++) {
103      void *buf = 0;
104      if (lp->so_targets[i]) {
105         buf = llvmpipe_resource(lp->so_targets[i]->target.buffer)->data;
106         lp->so_targets[i]->mapping = buf;
107      }
108   }
109   draw_set_mapped_so_targets(draw, lp->num_so_targets,
110                              lp->so_targets);
111
112   llvmpipe_prepare_vertex_sampling(lp,
113                                    lp->num_sampler_views[PIPE_SHADER_VERTEX],
114                                    lp->sampler_views[PIPE_SHADER_VERTEX]);
115   llvmpipe_prepare_geometry_sampling(lp,
116                                      lp->num_sampler_views[PIPE_SHADER_GEOMETRY],
117                                      lp->sampler_views[PIPE_SHADER_GEOMETRY]);
118   if (lp->gs && lp->gs->no_tokens) {
119      /* we have an empty geometry shader with stream output, so
120         attach the stream output info to the current vertex shader */
121      if (lp->vs) {
122         draw_vs_attach_so(lp->vs, &lp->gs->stream_output);
123      }
124   }
125   draw_collect_pipeline_statistics(draw,
126                                    lp->active_statistics_queries > 0);
127
128   /* draw! */
129   draw_vbo(draw, info);
130
131   /*
132    * unmap vertex/index buffers
133    */
134   for (i = 0; i < lp->num_vertex_buffers; i++) {
135      draw_set_mapped_vertex_buffer(draw, i, NULL, 0);
136   }
137   if (mapped_indices) {
138      draw_set_indexes(draw, NULL, 0, 0);
139   }
140   draw_set_mapped_so_targets(draw, 0, NULL);
141
142   if (lp->gs && lp->gs->no_tokens) {
143      /* we have attached stream output to the vs for rendering,
144         now lets reset it */
145      if (lp->vs) {
146         draw_vs_reset_so(lp->vs);
147      }
148   }
149
150   /*
151    * TODO: Flush only when a user vertex/index buffer is present
152    * (or even better, modify draw module to do this
153    * internally when this condition is seen?)
154    */
155   draw_flush(draw);
156}
157
158
159void
160llvmpipe_init_draw_funcs(struct llvmpipe_context *llvmpipe)
161{
162   llvmpipe->pipe.draw_vbo = llvmpipe_draw_vbo;
163}
164