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
|
/**************************************************************************
*
* 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.
*
**************************************************************************/
/* Authors: Keith Whitwell <keith@tungstengraphics.com>
*/
#include "main/imports.h"
#include "draw_private.h"
struct flatshade_stage {
struct prim_stage stage;
const GLuint *lookup;
};
static INLINE struct flatshade_stage *flatshade_stage( struct prim_stage *stage )
{
return (struct flatshade_stage *)stage;
}
static void flatshade_begin( struct prim_stage *stage )
{
stage->next->begin( stage->next );
}
static INLINE void copy_attr( GLuint attr,
struct vertex_header *dst,
const struct vertex_header *src )
{
if (attr) {
memcpy( dst->data[attr],
src->data[attr],
sizeof(src->data[0]) );
}
}
static INLINE void copy_colors( struct prim_stage *stage,
struct vertex_header *dst,
const struct vertex_header *src )
{
const struct flatshade_stage *flatshade = flatshade_stage(stage);
const GLuint *lookup = flatshade->lookup;
copy_attr( lookup[VF_ATTRIB_COLOR0], dst, src );
copy_attr( lookup[VF_ATTRIB_COLOR1], dst, src );
copy_attr( lookup[VF_ATTRIB_BFC0], dst, src );
copy_attr( lookup[VF_ATTRIB_BFC1], dst, src );
}
/**
* Flatshade tri. Required for clipping and when unfilled tris are
* active, otherwise handled by hardware.
*/
static void flatshade_tri( struct prim_stage *stage,
struct prim_header *header )
{
struct prim_header tmp;
tmp.det = header->det;
tmp.v[0] = dup_vert(stage, header->v[0], 0);
tmp.v[1] = dup_vert(stage, header->v[1], 1);
tmp.v[2] = header->v[2];
copy_colors(stage, tmp.v[0], tmp.v[2]);
copy_colors(stage, tmp.v[1], tmp.v[2]);
stage->next->tri( stage->next, &tmp );
}
/**
* Flatshade line. Required for clipping.
*/
static void flatshade_line( struct prim_stage *stage,
struct prim_header *header )
{
struct prim_header tmp;
tmp.v[0] = dup_vert(stage, header->v[0], 0);
tmp.v[1] = header->v[1];
copy_colors(stage, tmp.v[0], tmp.v[1]);
stage->next->line( stage->next, &tmp );
}
static void flatshade_point( struct prim_stage *stage,
struct prim_header *header )
{
stage->next->point( stage->next, header );
}
static void flatshade_end( struct prim_stage *stage )
{
stage->next->end( stage->next );
}
struct prim_stage *prim_flatshade( struct draw_context *draw )
{
struct flatshade_stage *flatshade = CALLOC_STRUCT(flatshade_stage);
prim_alloc_tmps( &flatshade->stage, 2 );
flatshade->stage.draw = draw;
flatshade->stage.next = NULL;
flatshade->stage.begin = flatshade_begin;
flatshade->stage.point = flatshade_point;
flatshade->stage.line = flatshade_line;
flatshade->stage.tri = flatshade_tri;
flatshade->stage.end = flatshade_end;
flatshade->lookup = draw->vf_attr_to_slot;
return &flatshade->stage;
}
|
