1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* Private data structures, etc for the draw module.
*/
/**
* Authors:
* Keith Whitwell <keith@tungstengraphics.com>
* Brian Paul
*/
#ifndef DRAW_PRIVATE_H
#define DRAW_PRIVATE_H
#include "main/glheader.h"
#include "pipe/p_state.h"
#include "pipe/p_defines.h"
#include "vf/vf.h"
/**
* Basic vertex info.
* Carry some useful information around with the vertices in the prim pipe.
*/
struct vertex_header {
GLuint clipmask:12;
GLuint edgeflag:1;
GLuint pad:19;
GLfloat clip[4];
GLfloat data[][4]; /* Note variable size */
};
/**
* Basic info for a point/line/triangle primitive.
*/
struct prim_header {
GLfloat det; /**< front/back face determinant */
struct vertex_header *v[3]; /**< 1 to 3 vertex pointers */
};
struct draw_context;
/**
* Base class for all primitive drawing stages.
*/
struct draw_stage
{
struct draw_context *draw; /**< parent context */
struct draw_stage *next; /**< next stage in pipeline */
struct vertex_header **tmp;
GLuint nr_tmps;
void (*begin)( struct draw_stage * );
void (*point)( struct draw_stage *,
struct prim_header * );
void (*line)( struct draw_stage *,
struct prim_header * );
void (*tri)( struct draw_stage *,
struct prim_header * );
void (*end)( struct draw_stage * );
void (*reset_stipple_counter)( struct draw_stage * );
};
/**
* Private context for the drawing module.
*/
struct draw_context
{
struct {
struct draw_stage *first; /**< one of the following */
/* stages (in logical order) */
struct draw_stage *flatshade;
struct draw_stage *clip;
struct draw_stage *cull;
struct draw_stage *twoside;
struct draw_stage *offset;
struct draw_stage *unfilled;
struct draw_stage *setup; /* aka render/rasterize */
} pipeline;
/* pipe state that we need: */
struct pipe_setup_state setup;
struct pipe_viewport_state viewport;
/* Clip derived state:
*/
GLfloat plane[12][4];
GLuint nr_planes;
GLuint vf_attr_to_slot[PIPE_ATTRIB_MAX];
struct vf_attr_map attrs[VF_ATTRIB_MAX];
GLuint nr_attrs;
GLuint vertex_size; /**< in bytes */
struct vertex_fetch *vf;
GLubyte *verts;
GLuint nr_vertices;
GLboolean in_vb;
GLenum prim; /**< GL_POINTS, GL_LINE_STRIP, GL_QUADS, etc */
/* Helper for tnl:
*/
GLvector4f header;
};
extern struct draw_stage *draw_unfilled_stage( struct draw_context *context );
extern struct draw_stage *draw_twoside_stage( struct draw_context *context );
extern struct draw_stage *draw_offset_stage( struct draw_context *context );
extern struct draw_stage *draw_clip_stage( struct draw_context *context );
extern struct draw_stage *draw_flatshade_stage( struct draw_context *context );
extern struct draw_stage *draw_cull_stage( struct draw_context *context );
extern void draw_free_tmps( struct draw_stage *stage );
extern void draw_alloc_tmps( struct draw_stage *stage, GLuint nr );
/**
* Get a writeable copy of a vertex.
* \param stage drawing stage info
* \param vert the vertex to copy (source)
* \param idx index into stage's tmp[] array to put the copy (dest)
* \return pointer to the copied vertex
*/
static INLINE struct vertex_header *
dup_vert( struct draw_stage *stage,
const struct vertex_header *vert,
GLuint idx )
{
struct vertex_header *tmp = stage->tmp[idx];
memcpy(tmp, vert, stage->draw->vertex_size );
return tmp;
}
#endif /* DRAW_PRIVATE_H */
|
