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
|
#include "../tests.h"
#include "shaders.h"
#include <libplacebo/dummy.h>
#include <libplacebo/shaders/colorspace.h>
#include <libplacebo/shaders/custom.h>
#include <libplacebo/shaders/sampling.h>
__AFL_FUZZ_INIT();
#pragma clang optimize off
int main()
{
pl_gpu gpu = pl_gpu_dummy_create(NULL, NULL);
#define WIDTH 64
#define HEIGHT 64
#define COMPS 4
static const float empty[HEIGHT][WIDTH][COMPS] = {0};
struct pl_sample_src src = {
.tex = pl_tex_create(gpu, pl_tex_params(
.format = pl_find_fmt(gpu, PL_FMT_FLOAT, COMPS, 0, 32, PL_FMT_CAP_SAMPLEABLE),
.initial_data = empty,
.sampleable = true,
.w = WIDTH,
.h = HEIGHT,
)),
.new_w = WIDTH * 2,
.new_h = HEIGHT * 2,
};
if (!src.tex)
return 1;
#ifdef __AFL_HAVE_MANUAL_CONTROL
__AFL_INIT();
#endif
unsigned char *buf = __AFL_FUZZ_TESTCASE_BUF;
while (__AFL_LOOP(10000)) {
#define STACK_SIZE 16
pl_shader stack[STACK_SIZE] = {0};
int idx = 0;
stack[0] = pl_shader_alloc(NULL, pl_shader_params(
.gpu = gpu,
));
pl_shader sh = stack[idx];
pl_shader_obj polar = NULL, ortho = NULL, peak = NULL, dither = NULL;
size_t len = __AFL_FUZZ_TESTCASE_LEN;
for (size_t pos = 0; pos < len; pos++) {
switch (buf[pos]) {
// Sampling steps
case 'S':
pl_shader_sample_direct(sh, &src);
break;
case 'D':
pl_shader_deband(sh, &src, NULL);
break;
case 'P':
pl_shader_sample_polar(sh, &src, pl_sample_filter_params(
.filter = pl_filter_ewa_lanczos,
.lut = &polar,
));
break;
case 'O': ;
struct pl_sample_src srcfix = src;
srcfix.new_w = WIDTH;
pl_shader_sample_ortho2(sh, &srcfix, pl_sample_filter_params(
.filter = pl_filter_spline36,
.lut = &ortho,
));
break;
case 'X':
pl_shader_custom(sh, &(struct pl_custom_shader) {
.input = PL_SHADER_SIG_NONE,
.output = PL_SHADER_SIG_COLOR,
.body = "// merge subpasses",
});
break;
// Colorspace transformation steps
case 'y': {
struct pl_color_repr repr = pl_color_repr_jpeg;
pl_shader_decode_color(sh, &repr, NULL);
break;
}
case 'p':
pl_shader_detect_peak(sh, pl_color_space_hdr10, &peak, NULL);
break;
case 'm':
pl_shader_color_map(sh, NULL, pl_color_space_bt709,
pl_color_space_monitor, NULL, false);
break;
case 't':
pl_shader_color_map(sh, NULL, pl_color_space_hdr10,
pl_color_space_monitor, &peak, false);
break;
case 'd':
pl_shader_dither(sh, 8, &dither, pl_dither_params(
// Picked to speed up calculation
.method = PL_DITHER_ORDERED_LUT,
.lut_size = 2,
));
break;
// Push and pop subshader commands
case '(':
if (idx+1 == STACK_SIZE)
goto invalid;
idx++;
if (!stack[idx]) {
stack[idx] = pl_shader_alloc(NULL, pl_shader_params(
.gpu = gpu,
.id = idx,
));
}
sh = stack[idx];
break;
case ')':
if (idx == 0)
goto invalid;
idx--;
sh_subpass(stack[idx], stack[idx + 1]);
pl_shader_reset(stack[idx + 1], pl_shader_params(
.gpu = gpu,
.id = idx + 1,
));
sh = stack[idx];
break;
default:
goto invalid;
}
}
// Merge remaining shaders
while (idx > 0) {
sh_subpass(stack[idx - 1], stack[idx]);
idx--;
}
pl_shader_finalize(stack[0]);
invalid:
for (int i = 0; i < STACK_SIZE; i++)
pl_shader_free(&stack[i]);
pl_shader_obj_destroy(&polar);
pl_shader_obj_destroy(&ortho);
pl_shader_obj_destroy(&peak);
pl_shader_obj_destroy(&dither);
}
pl_tex_destroy(gpu, &src.tex);
pl_gpu_dummy_destroy(&gpu);
}
|
