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_prim.h"
37
38 #include "lp_context.h"
39 #include "lp_state.h"
40 #include "lp_query.h"
41
42 #include "draw/draw_context.h"
43
44
45
46 /**
47 * Draw vertex arrays, with optional indexing, optional instancing.
48 * All the other drawing functions are implemented in terms of this function.
49 * Basically, map the vertex buffers (and drawing surfaces), then hand off
50 * the drawing to the 'draw' module.
51 */
52 static void
llvmpipe_draw_vbo(struct pipe_context * pipe,const struct pipe_draw_info * info)53 llvmpipe_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
54 {
55 struct llvmpipe_context *lp = llvmpipe_context(pipe);
56 struct draw_context *draw = lp->draw;
57 const void *mapped_indices = NULL;
58 unsigned i;
59
60 if (!llvmpipe_check_render_cond(lp))
61 return;
62
63 if (lp->dirty)
64 llvmpipe_update_derived( lp );
65
66 /*
67 * Map vertex buffers
68 */
69 for (i = 0; i < lp->num_vertex_buffers; i++) {
70 const void *buf = lp->vertex_buffer[i].user_buffer;
71 if (!buf)
72 buf = llvmpipe_resource_data(lp->vertex_buffer[i].buffer);
73 draw_set_mapped_vertex_buffer(draw, i, buf);
74 }
75
76 /* Map index buffer, if present */
77 if (info->indexed) {
78 mapped_indices = lp->index_buffer.user_buffer;
79 if (!mapped_indices)
80 mapped_indices = llvmpipe_resource_data(lp->index_buffer.buffer);
81
82 draw_set_indexes(draw,
83 (ubyte *) mapped_indices + lp->index_buffer.offset,
84 lp->index_buffer.index_size);
85 }
86
87 llvmpipe_prepare_vertex_sampling(lp,
88 lp->num_sampler_views[PIPE_SHADER_VERTEX],
89 lp->sampler_views[PIPE_SHADER_VERTEX]);
90
91 /* draw! */
92 draw_vbo(draw, info);
93
94 /*
95 * unmap vertex/index buffers
96 */
97 for (i = 0; i < lp->num_vertex_buffers; i++) {
98 draw_set_mapped_vertex_buffer(draw, i, NULL);
99 }
100 if (mapped_indices) {
101 draw_set_indexes(draw, NULL, 0);
102 }
103 llvmpipe_cleanup_vertex_sampling(lp);
104
105 /*
106 * TODO: Flush only when a user vertex/index buffer is present
107 * (or even better, modify draw module to do this
108 * internally when this condition is seen?)
109 */
110 draw_flush(draw);
111 }
112
113
114 void
llvmpipe_init_draw_funcs(struct llvmpipe_context * llvmpipe)115 llvmpipe_init_draw_funcs(struct llvmpipe_context *llvmpipe)
116 {
117 llvmpipe->pipe.draw_vbo = llvmpipe_draw_vbo;
118 }
119