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 © 2009 Intel Corporation
*
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#include <string.h>
#include "main/mtypes.h"
#include "prog_instruction.h"
#include "program_parser.h"
/**
* Extra assembly-level parser routines
*
* \author Ian Romanick <ian.d.romanick@intel.com>
*/
int
_mesa_parse_instruction_suffix(const struct asm_parser_state *state,
const char *suffix,
struct prog_instruction *inst)
{
inst->Saturate = GL_FALSE;
/* The only possible suffix element is the saturation selector from
* ARB_fragment_program.
*/
if (state->mode == ARB_fragment) {
if (strcmp(suffix, "_SAT") == 0) {
inst->Saturate = GL_TRUE;
suffix += 4;
}
}
/* It is an error for all of the suffix string not to be consumed.
*/
return suffix[0] == '\0';
}
int
_mesa_ARBvp_parse_option(struct asm_parser_state *state, const char *option)
{
if (strcmp(option, "ARB_position_invariant") == 0) {
state->option.PositionInvariant = 1;
return 1;
}
return 0;
}
int
_mesa_ARBfp_parse_option(struct asm_parser_state *state, const char *option)
{
unsigned fog_option;
/* All of the options currently supported start with "ARB_". The code is
* currently structured with nested if-statements because eventually options
* that start with "NV_" will be supported. This structure will result in
* less churn when those options are added.
*/
if (strncmp(option, "ARB_", 4) == 0) {
/* Advance the pointer past the "ARB_" prefix.
*/
option += 4;
if (strncmp(option, "fog_", 4) == 0) {
option += 4;
if (strcmp(option, "exp") == 0) {
fog_option = OPTION_FOG_EXP;
} else if (strcmp(option, "exp2") == 0) {
fog_option = OPTION_FOG_EXP2;
} else if (strcmp(option, "linear") == 0) {
fog_option = OPTION_FOG_LINEAR;
} else {
/* invalid option */
return 0;
}
if (state->option.Fog == OPTION_NONE) {
state->option.Fog = fog_option;
return 1;
}
/* The ARB_fragment_program specification instructs us to handle
* redundant options in two seemingly contradictory ways:
*
* Section 3.11.4.5.1 says:
* "Only one fog application option may be specified by any given
* fragment program. A fragment program that specifies more than one
* of the program options "ARB_fog_exp", "ARB_fog_exp2", and
* "ARB_fog_linear", will fail to load."
*
* Issue 27 says:
* "The three mandatory options are ARB_fog_exp, ARB_fog_exp2, and
* ARB_fog_linear. As these options are mutually exclusive by
* nature, specifying more than one is not useful. If more than one
* is specified, the last one encountered in the <optionSequence>
* will be the one to actually modify the execution environment."
*
* We choose to allow programs to specify the same OPTION redundantly,
* but fail to load programs that specify contradictory options.
*/
return state->option.Fog == fog_option ? 1 : 0;
} else if (strncmp(option, "precision_hint_", 15) == 0) {
option += 15;
/* The ARB_fragment_program spec, 3.11.4.5.2 says:
*
* "Only one precision control option may be specified by any given
* fragment program. A fragment program that specifies both the
* "ARB_precision_hint_fastest" and "ARB_precision_hint_nicest"
* program options will fail to load.
*/
if (strcmp(option, "nicest") == 0 &&
state->option.PrecisionHint != OPTION_FASTEST) {
state->option.PrecisionHint = OPTION_NICEST;
return 1;
} else if (strcmp(option, "fastest") == 0 &&
state->option.PrecisionHint != OPTION_NICEST) {
state->option.PrecisionHint = OPTION_FASTEST;
return 1;
}
return 0;
} else if (strcmp(option, "draw_buffers") == 0) {
/* Don't need to check extension availability because all Mesa-based
* drivers support GL_ARB_draw_buffers.
*/
state->option.DrawBuffers = 1;
return 1;
} else if (strcmp(option, "fragment_program_shadow") == 0) {
if (state->ctx->Extensions.ARB_fragment_program_shadow) {
state->option.Shadow = 1;
return 1;
}
} else if (strncmp(option, "fragment_coord_", 15) == 0) {
option += 15;
if (state->ctx->Extensions.ARB_fragment_coord_conventions) {
if (strcmp(option, "origin_upper_left") == 0) {
state->option.OriginUpperLeft = 1;
return 1;
}
else if (strcmp(option, "pixel_center_integer") == 0) {
state->option.PixelCenterInteger = 1;
return 1;
}
}
}
} else if (strncmp(option, "ATI_", 4) == 0) {
option += 4;
if (strcmp(option, "draw_buffers") == 0) {
/* Don't need to check extension availability because all Mesa-based
* drivers support GL_ATI_draw_buffers.
*/
state->option.DrawBuffers = 1;
return 1;
}
}
return 0;
}
|
