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,unsigned drawid_offset,const struct pipe_draw_indirect_info * indirect,const struct pipe_draw_start_count_bias * draws,unsigned num_draws)54 llvmpipe_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info,
55 unsigned drawid_offset,
56 const struct pipe_draw_indirect_info *indirect,
57 const struct pipe_draw_start_count_bias *draws,
58 unsigned num_draws)
59 {
60 if (!indirect && (!draws[0].count || !info->instance_count))
61 return;
62
63 struct llvmpipe_context *lp = llvmpipe_context(pipe);
64 struct draw_context *draw = lp->draw;
65 const void *mapped_indices = NULL;
66 unsigned i;
67
68 if (!llvmpipe_check_render_cond(lp))
69 return;
70
71 if (indirect && indirect->buffer) {
72 util_draw_indirect(pipe, info, drawid_offset, indirect);
73 return;
74 }
75
76 if (lp->dirty)
77 llvmpipe_update_derived(lp);
78
79 /*
80 * Map vertex buffers
81 */
82 for (i = 0; i < lp->num_vertex_buffers; i++) {
83 const void *buf = lp->vertex_buffer[i].is_user_buffer ?
84 lp->vertex_buffer[i].buffer.user : NULL;
85 size_t size = ~0;
86 if (!buf) {
87 if (!lp->vertex_buffer[i].buffer.resource) {
88 continue;
89 }
90 buf = llvmpipe_resource_data(lp->vertex_buffer[i].buffer.resource);
91 size = lp->vertex_buffer[i].buffer.resource->width0;
92 }
93 draw_set_mapped_vertex_buffer(draw, i, buf, size);
94 }
95
96 /* Map index buffer, if present */
97 if (info->index_size) {
98 unsigned available_space = ~0;
99 mapped_indices = info->has_user_indices ? info->index.user : NULL;
100 if (!mapped_indices) {
101 mapped_indices = llvmpipe_resource_data(info->index.resource);
102 available_space = info->index.resource->width0;
103 }
104 draw_set_indexes(draw,
105 (uint8_t *) mapped_indices,
106 info->index_size, available_space);
107 }
108
109 llvmpipe_prepare_vertex_sampling(lp,
110 lp->num_sampler_views[PIPE_SHADER_VERTEX],
111 lp->sampler_views[PIPE_SHADER_VERTEX]);
112 llvmpipe_prepare_geometry_sampling(lp,
113 lp->num_sampler_views[PIPE_SHADER_GEOMETRY],
114 lp->sampler_views[PIPE_SHADER_GEOMETRY]);
115 llvmpipe_prepare_tess_ctrl_sampling(lp,
116 lp->num_sampler_views[PIPE_SHADER_TESS_CTRL],
117 lp->sampler_views[PIPE_SHADER_TESS_CTRL]);
118 llvmpipe_prepare_tess_eval_sampling(lp,
119 lp->num_sampler_views[PIPE_SHADER_TESS_EVAL],
120 lp->sampler_views[PIPE_SHADER_TESS_EVAL]);
121
122 llvmpipe_prepare_vertex_images(lp,
123 lp->num_images[PIPE_SHADER_VERTEX],
124 lp->images[PIPE_SHADER_VERTEX]);
125 llvmpipe_prepare_geometry_images(lp,
126 lp->num_images[PIPE_SHADER_GEOMETRY],
127 lp->images[PIPE_SHADER_GEOMETRY]);
128 llvmpipe_prepare_tess_ctrl_images(lp,
129 lp->num_images[PIPE_SHADER_TESS_CTRL],
130 lp->images[PIPE_SHADER_TESS_CTRL]);
131 llvmpipe_prepare_tess_eval_images(lp,
132 lp->num_images[PIPE_SHADER_TESS_EVAL],
133 lp->images[PIPE_SHADER_TESS_EVAL]);
134 if (lp->gs && lp->gs->no_tokens) {
135 /* we have an empty geometry shader with stream output, so
136 attach the stream output info to the current vertex shader */
137 if (lp->vs) {
138 draw_vs_attach_so(lp->vs, &lp->gs->stream_output);
139 }
140 }
141 draw_collect_pipeline_statistics(draw,
142 lp->active_statistics_queries > 0 &&
143 !lp->queries_disabled);
144
145 draw_collect_primitives_generated(draw,
146 lp->active_primgen_queries &&
147 !lp->queries_disabled);
148
149 /* draw! */
150 draw_vbo(draw, info, drawid_offset, indirect, draws, num_draws,
151 lp->patch_vertices);
152
153 /*
154 * unmap vertex/index buffers
155 */
156 for (i = 0; i < lp->num_vertex_buffers; i++) {
157 draw_set_mapped_vertex_buffer(draw, i, NULL, 0);
158 }
159 if (mapped_indices) {
160 draw_set_indexes(draw, NULL, 0, 0);
161 }
162
163 if (lp->gs && lp->gs->no_tokens) {
164 /* we have attached stream output to the vs for rendering,
165 now lets reset it */
166 if (lp->vs) {
167 draw_vs_reset_so(lp->vs);
168 }
169 }
170
171 llvmpipe_cleanup_stage_sampling(lp, PIPE_SHADER_VERTEX);
172 llvmpipe_cleanup_stage_sampling(lp, PIPE_SHADER_GEOMETRY);
173 llvmpipe_cleanup_stage_sampling(lp, PIPE_SHADER_TESS_CTRL);
174 llvmpipe_cleanup_stage_sampling(lp, PIPE_SHADER_TESS_EVAL);
175
176 llvmpipe_cleanup_stage_images(lp, PIPE_SHADER_VERTEX);
177 llvmpipe_cleanup_stage_images(lp, PIPE_SHADER_GEOMETRY);
178 llvmpipe_cleanup_stage_images(lp, PIPE_SHADER_TESS_CTRL);
179 llvmpipe_cleanup_stage_images(lp, PIPE_SHADER_TESS_EVAL);
180
181 /*
182 * TODO: Flush only when a user vertex/index buffer is present
183 * (or even better, modify draw module to do this
184 * internally when this condition is seen?)
185 */
186 draw_flush(draw);
187 }
188
189
190 void
llvmpipe_init_draw_funcs(struct llvmpipe_context * llvmpipe)191 llvmpipe_init_draw_funcs(struct llvmpipe_context *llvmpipe)
192 {
193 llvmpipe->pipe.draw_vbo = llvmpipe_draw_vbo;
194 }
195