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 (C) 2019 - Vito Caputo - <vcaputo@pengaru.com>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3 as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "din/din.h"
#include "fb.h"
#include "rototiller.h"
#include "util.h"
typedef struct swab_context_t {
din_t *din;
float r;
unsigned n_cpus;
} swab_context_t;
typedef struct color_t {
float r,g,b;
} color_t;
typedef struct v3f_t {
float x, y, z;
} v3f_t;
/* convert a color into a packed, 32-bit rgb pixel value (taken from libs/ray/ray_color.h) */
static inline uint32_t color_to_uint32(color_t color) {
uint32_t pixel;
if (color.r > 1.0f) color.r = 1.0f;
if (color.g > 1.0f) color.g = 1.0f;
if (color.b > 1.0f) color.b = 1.0f;
if (color.r < .0f) color.r = .0f;
if (color.g < .0f) color.g = .0f;
if (color.b < .0f) color.b = .0f;
pixel = (uint32_t)(color.r * 255.0f);
pixel <<= 8;
pixel |= (uint32_t)(color.g * 255.0f);
pixel <<= 8;
pixel |= (uint32_t)(color.b * 255.0f);
return pixel;
}
static void * swab_create_context(unsigned num_cpus)
{
swab_context_t *ctxt;
ctxt = calloc(1, sizeof(swab_context_t));
if (!ctxt)
return NULL;
ctxt->din = din_new(12, 12, 100);
if (!ctxt->din) {
free(ctxt);
return NULL;
}
return ctxt;
}
static void swab_destroy_context(void *context)
{
swab_context_t *ctxt = context;
din_free(ctxt->din);
free(ctxt);
}
static int swab_fragmenter(void *context, const fb_fragment_t *fragment, unsigned number, fb_fragment_t *res_fragment)
{
swab_context_t *ctxt = context;
return fb_fragment_slice_single(fragment, ctxt->n_cpus, number, res_fragment);
}
static void swab_prepare_frame(void *context, unsigned n_cpus, fb_fragment_t *fragment, rototiller_fragmenter_t *res_fragmenter)
{
swab_context_t *ctxt = context;
*res_fragmenter = swab_fragmenter;
ctxt->r += .0001f;
ctxt->n_cpus = n_cpus;
}
static void swab_render_fragment(void *context, unsigned cpu, fb_fragment_t *fragment)
{
swab_context_t *ctxt = context;
float cos_r = cos(ctxt->r);
float sin_r = sin(ctxt->r);
float z1 = cos_r;
float z2 = sin_r;
float xscale = 1.f / (float)fragment->frame_width;
float yscale = 1.f / (float)fragment->frame_height;
for (int y = fragment->y; y < fragment->y + fragment->height; y++) {
for (int x = fragment->x; x < fragment->x + fragment->width; x++) {
color_t color;
uint32_t pixel;
float t;
t = din(ctxt->din, &(v3f_t){ .x = (float)x * xscale * .5f, .y = (float)y * yscale * .5f, .z = -z2 }) * 33.f;
color.r = din(ctxt->din, &(v3f_t){ .x = (float)x * xscale * .7f, .y = (float)y * yscale * .7f, .z = z1 }) * t;
color.g = din(ctxt->din, &(v3f_t){ .x = (float)x * xscale * .93f, .y = (float)y * yscale * .93f, .z = -z1 }) * t;
color.b = din(ctxt->din, &(v3f_t){ .x = (float)x * xscale * .81f, .y = (float)y * yscale * .81f, .z = z2 }) * t;
pixel = color_to_uint32(color);
fb_fragment_put_pixel_unchecked(fragment, x, y, pixel);
}
}
}
rototiller_module_t swab_module = {
.create_context = swab_create_context,
.destroy_context = swab_destroy_context,
.prepare_frame = swab_prepare_frame,
.render_fragment = swab_render_fragment,
.name = "swab",
.description = "Colorful perlin-noise visualization (threaded)",
.author = "Vito Caputo <vcaputo@pengaru.com>",
.license = "GPLv3",
};
|
