1/**************************************************************************
2 *
3 * Copyright 2008 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#ifndef U_DRAW_H
29#define U_DRAW_H
30
31
32#include "pipe/p_compiler.h"
33#include "pipe/p_context.h"
34#include "pipe/p_state.h"
35
36
37#ifdef __cplusplus
38extern "C" {
39#endif
40
41
42static inline void
43util_draw_init_info(struct pipe_draw_info *info)
44{
45   memset(info, 0, sizeof(*info));
46   info->instance_count = 1;
47   info->max_index = 0xffffffff;
48}
49
50
51static inline void
52util_draw_arrays(struct pipe_context *pipe,
53                 enum pipe_prim_type mode,
54                 uint start,
55                 uint count)
56{
57   struct pipe_draw_info info;
58
59   util_draw_init_info(&info);
60   info.mode = mode;
61   info.start = start;
62   info.count = count;
63   info.min_index = start;
64   info.max_index = start + count - 1;
65
66   pipe->draw_vbo(pipe, &info);
67}
68
69static inline void
70util_draw_elements(struct pipe_context *pipe, int index_bias,
71                   enum pipe_prim_type mode,
72                   uint start,
73                   uint count)
74{
75   struct pipe_draw_info info;
76
77   util_draw_init_info(&info);
78   info.indexed = TRUE;
79   info.mode = mode;
80   info.start = start;
81   info.count = count;
82   info.index_bias = index_bias;
83
84   pipe->draw_vbo(pipe, &info);
85}
86
87static inline void
88util_draw_arrays_instanced(struct pipe_context *pipe,
89                           enum pipe_prim_type mode,
90                           uint start,
91                           uint count,
92                           uint start_instance,
93                           uint instance_count)
94{
95   struct pipe_draw_info info;
96
97   util_draw_init_info(&info);
98   info.mode = mode;
99   info.start = start;
100   info.count = count;
101   info.start_instance = start_instance;
102   info.instance_count = instance_count;
103   info.min_index = start;
104   info.max_index = start + count - 1;
105
106   pipe->draw_vbo(pipe, &info);
107}
108
109static inline void
110util_draw_elements_instanced(struct pipe_context *pipe,
111                             int index_bias,
112                             enum pipe_prim_type mode,
113                             uint start,
114                             uint count,
115                             uint start_instance,
116                             uint instance_count)
117{
118   struct pipe_draw_info info;
119
120   util_draw_init_info(&info);
121   info.indexed = TRUE;
122   info.mode = mode;
123   info.start = start;
124   info.count = count;
125   info.index_bias = index_bias;
126   info.start_instance = start_instance;
127   info.instance_count = instance_count;
128
129   pipe->draw_vbo(pipe, &info);
130}
131
132static inline void
133util_draw_range_elements(struct pipe_context *pipe,
134                         int index_bias,
135                         uint min_index,
136                         uint max_index,
137                         enum pipe_prim_type mode,
138                         uint start,
139                         uint count)
140{
141   struct pipe_draw_info info;
142
143   util_draw_init_info(&info);
144   info.indexed = TRUE;
145   info.mode = mode;
146   info.start = start;
147   info.count = count;
148   info.index_bias = index_bias;
149   info.min_index = min_index;
150   info.max_index = max_index;
151
152   pipe->draw_vbo(pipe, &info);
153}
154
155
156/* This converts an indirect draw into a direct draw by mapping the indirect
157 * buffer, extracting its arguments, and calling pipe->draw_vbo.
158 */
159void
160util_draw_indirect(struct pipe_context *pipe,
161                   const struct pipe_draw_info *info);
162
163
164unsigned
165util_draw_max_index(
166      const struct pipe_vertex_buffer *vertex_buffers,
167      const struct pipe_vertex_element *vertex_elements,
168      unsigned nr_vertex_elements,
169      const struct pipe_draw_info *info);
170
171
172#ifdef __cplusplus
173}
174#endif
175
176#endif /* !U_DRAW_H */
177