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
|
/**************************************************************************
*
* 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>
* Brian Paul
*/
#include "st_context.h"
#include "st_atom.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
/**
* Convert GLenum stencil func tokens to pipe tokens.
*/
static GLuint
gl_stencil_func_to_sp(GLenum func)
{
/* Same values, just biased */
assert(PIPE_FUNC_NEVER == GL_NEVER - GL_NEVER);
assert(PIPE_FUNC_LESS == GL_LESS - GL_NEVER);
assert(PIPE_FUNC_EQUAL == GL_EQUAL - GL_NEVER);
assert(PIPE_FUNC_LEQUAL == GL_LEQUAL - GL_NEVER);
assert(PIPE_FUNC_GREATER == GL_GREATER - GL_NEVER);
assert(PIPE_FUNC_NOTEQUAL == GL_NOTEQUAL - GL_NEVER);
assert(PIPE_FUNC_GEQUAL == GL_GEQUAL - GL_NEVER);
assert(PIPE_FUNC_ALWAYS == GL_ALWAYS - GL_NEVER);
assert(func >= GL_NEVER);
assert(func <= GL_ALWAYS);
return func - GL_NEVER;
}
/**
* Convert GLenum stencil op tokens to pipe tokens.
*/
static GLuint
gl_stencil_op_to_sp(GLenum func)
{
switch (func) {
case GL_KEEP:
return PIPE_STENCIL_OP_KEEP;
case GL_ZERO:
return PIPE_STENCIL_OP_ZERO;
case GL_REPLACE:
return PIPE_STENCIL_OP_REPLACE;
case GL_INCR:
return PIPE_STENCIL_OP_INCR;
case GL_DECR:
return PIPE_STENCIL_OP_DECR;
case GL_INCR_WRAP:
return PIPE_STENCIL_OP_INCR_WRAP;
case GL_DECR_WRAP:
return PIPE_STENCIL_OP_DECR_WRAP;
case GL_INVERT:
return PIPE_STENCIL_OP_INVERT;
default:
assert("invalid GL token in gl_stencil_op_to_sp()" == NULL);
return 0;
}
}
static void
update_stencil( struct st_context *st )
{
struct pipe_stencil_state stencil;
memset(&stencil, 0, sizeof(stencil));
if (st->ctx->Stencil.Enabled) {
stencil.front_enabled = 1;
stencil.front_func = gl_stencil_func_to_sp(st->ctx->Stencil.Function[0]);
stencil.front_fail_op = gl_stencil_op_to_sp(st->ctx->Stencil.FailFunc[0]);
stencil.front_zfail_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZFailFunc[0]);
stencil.front_zpass_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZPassFunc[0]);
stencil.ref_value[0] = st->ctx->Stencil.Ref[0] & 0xff;
stencil.value_mask[0] = st->ctx->Stencil.ValueMask[0] & 0xff;
stencil.write_mask[0] = st->ctx->Stencil.WriteMask[0] & 0xff;
if (st->ctx->Stencil.TestTwoSide) {
stencil.back_enabled = 1;
stencil.back_func = gl_stencil_func_to_sp(st->ctx->Stencil.Function[1]);
stencil.back_fail_op = gl_stencil_op_to_sp(st->ctx->Stencil.FailFunc[1]);
stencil.back_zfail_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZFailFunc[1]);
stencil.back_zpass_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZPassFunc[1]);
stencil.ref_value[1] = st->ctx->Stencil.Ref[1] & 0xff;
stencil.value_mask[1] = st->ctx->Stencil.ValueMask[1] & 0xff;
stencil.write_mask[1] = st->ctx->Stencil.WriteMask[1] & 0xff;
}
stencil.clear_value = st->ctx->Stencil.Clear & 0xff;
}
if (memcmp(&stencil, &st->state.stencil, sizeof(stencil)) != 0) {
/* state has changed */
st->state.stencil = stencil; /* struct copy */
st->pipe->set_stencil_state(st->pipe, &stencil); /* set new state */
}
}
const struct st_tracked_state st_update_stencil = {
.dirty = {
.mesa = (_NEW_STENCIL),
.st = 0,
},
.update = update_stencil
};
|
