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 */
53 static void
llvmpipe_draw_vbo(struct pipe_context * pipe,const struct pipe_draw_info * info)54 llvmpipe_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].user_buffer;
77 size_t size = ~0;
78 if (!buf) {
79 if (!lp->vertex_buffer[i].buffer) {
80 continue;
81 }
82 buf = llvmpipe_resource_data(lp->vertex_buffer[i].buffer);
83 size = lp->vertex_buffer[i].buffer->width0;
84 }
85 draw_set_mapped_vertex_buffer(draw, i, buf, size);
86 }
87
88 /* Map index buffer, if present */
89 if (info->indexed) {
90 unsigned available_space = ~0;
91 mapped_indices = lp->index_buffer.user_buffer;
92 if (!mapped_indices) {
93 mapped_indices = llvmpipe_resource_data(lp->index_buffer.buffer);
94 if (lp->index_buffer.buffer->width0 > lp->index_buffer.offset)
95 available_space =
96 (lp->index_buffer.buffer->width0 - lp->index_buffer.offset);
97 else
98 available_space = 0;
99 }
100 draw_set_indexes(draw,
101 (ubyte *) mapped_indices + lp->index_buffer.offset,
102 lp->index_buffer.index_size, available_space);
103 }
104
105 for (i = 0; i < lp->num_so_targets; i++) {
106 void *buf = 0;
107 if (lp->so_targets[i]) {
108 buf = llvmpipe_resource(lp->so_targets[i]->target.buffer)->data;
109 lp->so_targets[i]->mapping = buf;
110 }
111 }
112 draw_set_mapped_so_targets(draw, lp->num_so_targets,
113 lp->so_targets);
114
115 llvmpipe_prepare_vertex_sampling(lp,
116 lp->num_sampler_views[PIPE_SHADER_VERTEX],
117 lp->sampler_views[PIPE_SHADER_VERTEX]);
118 llvmpipe_prepare_geometry_sampling(lp,
119 lp->num_sampler_views[PIPE_SHADER_GEOMETRY],
120 lp->sampler_views[PIPE_SHADER_GEOMETRY]);
121 if (lp->gs && lp->gs->no_tokens) {
122 /* we have an empty geometry shader with stream output, so
123 attach the stream output info to the current vertex shader */
124 if (lp->vs) {
125 draw_vs_attach_so(lp->vs, &lp->gs->stream_output);
126 }
127 }
128 draw_collect_pipeline_statistics(draw,
129 lp->active_statistics_queries > 0);
130
131 /* draw! */
132 draw_vbo(draw, info);
133
134 /*
135 * unmap vertex/index buffers
136 */
137 for (i = 0; i < lp->num_vertex_buffers; i++) {
138 draw_set_mapped_vertex_buffer(draw, i, NULL, 0);
139 }
140 if (mapped_indices) {
141 draw_set_indexes(draw, NULL, 0, 0);
142 }
143 draw_set_mapped_so_targets(draw, 0, NULL);
144
145 if (lp->gs && lp->gs->no_tokens) {
146 /* we have attached stream output to the vs for rendering,
147 now lets reset it */
148 if (lp->vs) {
149 draw_vs_reset_so(lp->vs);
150 }
151 }
152
153 /*
154 * TODO: Flush only when a user vertex/index buffer is present
155 * (or even better, modify draw module to do this
156 * internally when this condition is seen?)
157 */
158 draw_flush(draw);
159 }
160
161
162 void
llvmpipe_init_draw_funcs(struct llvmpipe_context * llvmpipe)163 llvmpipe_init_draw_funcs(struct llvmpipe_context *llvmpipe)
164 {
165 llvmpipe->pipe.draw_vbo = llvmpipe_draw_vbo;
166 }
167