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
185
|
/*
* Mesa 3-D graphics library
* Version: 6.5
*
* Copyright (C) 1999-2005 Brian Paul 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, 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 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
* BRIAN PAUL 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.
*/
/* An attempt to hook s_fragprog_to_c.c up to libtcc.a to try &
* generate some real code.
*
* TCC isn't threadsafe, so it will need additional locking help if we
* end up using it as a backend in mesa.
*/
#include "glheader.h"
#include "imports.h"
#include "colormac.h"
#include "context.h"
#include "program_instruction.h"
#include "macros.h"
#include "program.h"
#include "s_nvfragprog.h"
#ifdef USE_TCC
#include <libtcc.h>
typedef int (*cfunc)( void *ctx,
const GLfloat (*local_param)[4],
const GLfloat (*env_param)[4],
const struct program_parameter *state_param,
const GLfloat (*interp)[4],
GLfloat (*outputs)[4]);
static cfunc current_func;
static struct fragment_program *current_program;
static TCCState *current_tcc_state;
static void TEX( void *cc, const float *texcoord, int unit, float *result )
{
GLcontext *ctx = (GLcontext *)cc;
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLfloat lambda = 1.0; /* hack */
GLchan rgba[4];
swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current,
1, (const GLfloat (*)[4]) texcoord,
&lambda, &rgba);
result[0] = CHAN_TO_FLOAT(rgba[0]);
result[1] = CHAN_TO_FLOAT(rgba[1]);
result[2] = CHAN_TO_FLOAT(rgba[2]);
result[3] = CHAN_TO_FLOAT(rgba[3]);
}
static void TXB( void *cc, const float *texcoord, int unit, float *result )
{
GLcontext *ctx = (GLcontext *)cc;
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLfloat lambda = 1.0; /* hack */
GLchan rgba[4];
/* texcoord[3] is the bias to add to lambda */
lambda += texcoord[3];
/* Is it necessary to reset texcoord[3] to 1 at this point?
*/
swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current,
1, (const GLfloat (*)[4]) texcoord,
&lambda, &rgba);
result[0] = CHAN_TO_FLOAT(rgba[0]);
result[1] = CHAN_TO_FLOAT(rgba[1]);
result[2] = CHAN_TO_FLOAT(rgba[2]);
result[3] = CHAN_TO_FLOAT(rgba[3]);
}
static void TXP( void *cc, const float *texcoord, int unit, float *result )
{
/* I think that TEX needs to undo the perspective divide which has
* already occurred. In the meantime, TXP is correct to do this:
*/
TEX( cc, texcoord, unit, result );
}
static cfunc codegen( TCCState *s, const char *prog, const char *fname )
{
unsigned long val;
if (s)
tcc_delete(s);
s = tcc_new();
if (!s)
return 0;
tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
tcc_compile_string(s, prog);
/* tcc_add_dll("/usr/lib/libm.so"); */
tcc_add_symbol(s, "TEX", (unsigned long)&TEX);
tcc_add_symbol(s, "TXB", (unsigned long)&TXB);
tcc_add_symbol(s, "TXP", (unsigned long)&TXP);
tcc_relocate(s);
tcc_get_symbol(s, &val, fname);
return (cfunc) val;
}
/* TCC isn't threadsafe and even seems not to like having more than
* one TCCState created or used at any one time in a single threaded
* environment. So, this code is all for investigation only and can't
* currently be used in Mesa proper.
*
* I've taken some liberties with globals myself, now.
*/
GLboolean
_swrast_execute_codegen_program( GLcontext *ctx,
const struct fragment_program *program, GLuint maxInst,
struct fp_machine *machine, const struct sw_span *span,
GLuint column )
{
if (program != current_program) {
_swrast_translate_program( ctx );
fprintf(stderr, "%s: compiling:\n%s\n", __FUNCTION__, program->c_str);
current_program = program;
current_func = codegen( current_tcc_state, program->c_str,
"run_program" );
}
assert(current_func);
return current_func( ctx,
program->Base.LocalParams,
(const GLfloat (*)[4])ctx->FragmentProgram.Parameters,
program->Parameters->Parameters,
(const GLfloat (*)[4])machine->Inputs,
machine->Outputs );
}
#else /* USE_TCC */
GLboolean
_swrast_execute_codegen_program( GLcontext *ctx,
const struct fragment_program *program, GLuint maxInst,
struct fp_machine *machine, const struct sw_span *span,
GLuint column )
{
(void) ctx;
(void) program; (void) maxInst;
(void) machine; (void) span;
(void) column;
return 0;
}
#endif
|
