-
Notifications
You must be signed in to change notification settings - Fork 0
/
gen_img.hpp
360 lines (307 loc) · 9.47 KB
/
gen_img.hpp
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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
#include <stdint.h>
#include <math.h>
/* ACID WARP (c)Copyright 1992, 1993 by Noah Spurrier
* All Rights reserved. Private Proprietary Source Code by Noah Spurrier
* Ported to Linux by Steven Wills
* Ported to SDL by Boris Gjenero
*/
void generate_image_float(int imageFuncNum, uint8_t* buf_graf,
int _xcenter, int _ycenter,
int _width, int _height,
int colors, int pitch, int normalize)
{
long x1, x2, x3, x4, y1, y2, y3, y4;
long _x, _y;
long _color;
double x, y;
double dx, dy;
double dist, angle;
double color;
double xcenter, ycenter, width, height;
if( normalize )
{
xcenter = (double) (_xcenter * 320) / _width;
ycenter = (double) (_ycenter * 200) / _height;
width = (double) 320;
height = (double) 200;
}
else
{
xcenter = _xcenter;
ycenter = _ycenter;
width = _width;
height = _height;
}
/* Some general purpose random angles and offsets.
* Not all functions use them.
*/
x1 = RANDOM(40) - 20;
x2 = RANDOM(40) - 20;
x3 = RANDOM(40) - 20;
x4 = RANDOM(40) - 20;
y1 = RANDOM(40) - 20;
y2 = RANDOM(40) - 20;
y3 = RANDOM(40) - 20;
y4 = RANDOM(40) - 20;
for( _y = 0;
_y < _height
&& !gDraw._draw_state.check_flag(DrawState::Abort)
;
++_y )
{
if( normalize )
{
y = (double) (_y * 200) / _height;
}
else
{
y = _y;
}
for( _x = 0; _x < _width; ++_x )
{
if( normalize )
{
x = (double) (_x * 320) / _width;
}
else
{
x = _x;
}
dx = x - xcenter;
/* dy may be altered below, so calculate here */
dy = y - ycenter;
dist = lut_dist(dx, dy);
angle = lut_angle(dx, dy);
switch( imageFuncNum )
{
case 0: /* Rays plus 2D Waves */
color = angle + lut_sin(dist * 10) / 64 +
lut_cos(x * ANGLE_UNIT / width * 2) / 32 +
lut_cos(y * ANGLE_UNIT / height * 2) / 32;
break;
case 1: /* Rays plus 2D Waves */
color = angle + lut_sin(dist * 10) / 16 +
lut_cos(x * ANGLE_UNIT / width * 2) / 8 +
lut_cos(y * ANGLE_UNIT / height * 2) / 8;
break;
case 2:
color = lut_sin(lut_dist(dx + x1, dy + y1) * 4) / 32 +
lut_sin(lut_dist(dx + x2, dy + y2) * 8) / 32 +
lut_sin(lut_dist(dx + x3, dy + y3) * 16) / 32 +
lut_sin(lut_dist(dx + x4, dy + y4) * 32) / 32;
break;
case 3: /* Peacock */
color = angle + lut_sin(lut_dist(dx + 20, dy) * 10) / 32 +
angle + lut_sin(lut_dist(dx - 20, dy) * 10) / 32;
break;
case 4:
color = lut_sin(dist) / 16;
break;
case 5: /* 2D Wave + Spiral */
color = lut_cos(x * ANGLE_UNIT / width) / 8 +
lut_cos(y * ANGLE_UNIT / height) / 8 +
angle + lut_sin(dist) / 32;
break;
case 6: /* Peacock, three centers */
color = lut_sin(lut_dist(dx, dy - 20) * 4) / 32 +
lut_sin(lut_dist(dx + 20, dy + 20) * 4) / 32 +
lut_sin(lut_dist(dx - 20, dy + 20) * 4) / 32;
break;
case 7: /* Peacock, three centers */
color = angle +
lut_sin(lut_dist(dx, dy - 20) * 8) / 32 +
lut_sin(lut_dist(dx + 20, dy + 20) * 8) / 32 +
lut_sin(lut_dist(dx - 20, dy + 20) * 8) / 32;
break;
case 8: /* Peacock, three centers */
color = lut_sin(lut_dist(dx, dy - 20) * 12) / 32 +
lut_sin(lut_dist(dx + 20, dy + 20) * 12) / 32 +
lut_sin(lut_dist(dx - 20, dy + 20) * 12) / 32;
break;
case 9: /* Five Arm Star */
color = dist + lut_sin(5 * angle) / 64;
break;
case 10: /* 2D Wave */
color = lut_cos(x * ANGLE_UNIT / width * 2) / 4 +
lut_cos(y * ANGLE_UNIT / height * 2) / 4;
break;
case 11: /* 2D Wave */
color = lut_cos(x * ANGLE_UNIT / width) / 8 +
lut_cos(y * ANGLE_UNIT / height) / 8;
break;
case 12: /* Simple Concentric Rings */
color = dist;
break;
case 13: /* Simple Rays */
color = angle;
break;
case 14: /* Toothed Spiral Sharp */
color = angle + lut_sin(dist * 8) / 32;
break;
case 15: /* Rings with sine */
color = lut_sin(dist * 4) / 32;
break;
case 16: /* Rings with sine with sliding inner Rings */
color = dist + lut_sin(dist * 4) / 32;
break;
case 17:
color = lut_sin(lut_cos(2 * x * ANGLE_UNIT / width)) / (20 + dist) + lut_sin(lut_cos(2 * y * ANGLE_UNIT / height)) / (20 + dist);
break;
case 18: /* 2D Wave */
color = lut_cos(7 * x * ANGLE_UNIT / width) / (20 + dist) +
lut_cos(7 * y * ANGLE_UNIT / height) / (20 + dist);
break;
case 19: /* 2D Wave */
color = lut_cos(17 * x * ANGLE_UNIT / width) / (20 + dist) +
lut_cos(17 * y * ANGLE_UNIT / height) / (20 + dist);
break;
case 20: /* 2D Wave Interference */
color = lut_cos(17 * x * ANGLE_UNIT / width) / 32 +
lut_cos(17 * y * ANGLE_UNIT / height) / 32 + dist + angle;
break;
case 21: /* 2D Wave Interference */
color = lut_cos(7 * x * ANGLE_UNIT / width) / 32 +
lut_cos(7 * y * ANGLE_UNIT / height) / 32 + dist;
break;
case 22: /* 2D Wave Interference */
color = lut_cos(7 * x * ANGLE_UNIT / width) / 32 +
lut_cos(7 * y * ANGLE_UNIT / height) / 32 +
lut_cos(11 * x * ANGLE_UNIT / width) / 32 +
lut_cos(11 * y * ANGLE_UNIT / height) / 32;
break;
case 23:
color = lut_sin(angle * 7) / 32;
break;
case 24:
color = lut_sin(lut_dist(dx + x1, dy + y1) * 2) / 12 +
lut_sin(lut_dist(dx + x2, dy + y2) * 4) / 12 +
lut_sin(lut_dist(dx + x3, dy + y3) * 6) / 12 +
lut_sin(lut_dist(dx + x4, dy + y4) * 8) / 12;
break;
case 25:
color = angle + lut_sin(lut_dist(dx + x1, dy + y1) * 2) / 16 +
angle + lut_sin(lut_dist(dx + x2, dy + y2) * 4) / 16 +
lut_sin(lut_dist(dx + x3, dy + y3) * 6) / 8 +
lut_sin(lut_dist(dx + x4, dy + y4) * 8) / 8;
break;
case 26:
color = angle + lut_sin(lut_dist(dx + x1, dy + y1) * 2) / 12 +
angle + lut_sin(lut_dist(dx + x2, dy + y2) * 4) / 12 +
angle + lut_sin(lut_dist(dx + x3, dy + y3) * 6) / 12 +
angle + lut_sin(lut_dist(dx + x4, dy + y4) * 8) / 12;
break;
case 27:
color = lut_sin(lut_dist(dx + x1, dy + y1) * 2) / 32 +
lut_sin(lut_dist(dx + x2, dy + y2) * 4) / 32 +
lut_sin(lut_dist(dx + x3, dy + y3) * 6) / 32 +
lut_sin(lut_dist(dx + x4, dy + y4) * 8) / 32;
break;
case 28: /* Random Curtain of Rain (in strong wind) */
if( y == 0 || x == 0 )
color = RANDOM(16);
else
color = (*(buf_graf + (pitch * _y) + (_x - 1)) + *(buf_graf + (pitch * (_y - 1)) + _x)) / 2 + RANDOM(16) - 8;
break;
case 29:
if( y == 0 || x == 0 )
color = RANDOM(1024);
else
color = dist / 6 + (*(buf_graf + (pitch * _y) + (_x - 1)) + *(buf_graf + (pitch * (_y - 1)) + _x)) / 2 + RANDOM(16) - 8;
break;
case 30:
color = xor (xor (lut_sin(lut_dist(dx, dy - 20) * 4) / 32,
lut_sin(lut_dist(dx + 20, dy + 20) * 4) / 32),
lut_sin(lut_dist(dx - 20, dy + 20) * 4) / 32);
break;
case 31:
color = xor (mod(angle, (ANGLE_UNIT / 4)), dist);
break;
case 32:
color = xor (dy, dx);
break;
case 33: /* Variation on Rain */
if( y == 0 || x == 0 )
color = RANDOM(16);
else
color = (*(buf_graf + (pitch * _y) + (_x - 1)) + *(buf_graf + (pitch * (_y - 1)) + _x)) / 2;
color += RANDOM(2) - 1;
if( color < 64 )
color += RANDOM(16) - 8;
break;
case 34: /* Variation on Rain */
if( y == 0 || x == 0 )
color = RANDOM(16);
else
color = (*(buf_graf + (pitch * _y) + (_x - 1)) + *(buf_graf + (pitch * (_y - 1)) + _x)) / 2;
if( color < 100 )
color += RANDOM(16) - 8;
break;
case 35:
color = angle + lut_sin(dist * 8) / 32;
dx = x - xcenter;
dy = (y - ycenter) * 2;
dist = lut_dist(dx, dy);
angle = lut_angle(dx, dy);
color = (color + angle + lut_sin(dist * 8) / 32) / 2;
break;
case 36:
color = angle + lut_sin(dist * 10) / 16 +
lut_cos(x * ANGLE_UNIT / width * 2) / 8 +
lut_cos(y * ANGLE_UNIT / height * 2) / 8;
dx = x - xcenter;
dy = (y - ycenter) * 2;
dist = lut_dist(dx, dy);
angle = lut_angle(dx, dy);
color = (color + angle + lut_sin(dist * 8) / 32) / 2;
break;
case 37:
color = angle + lut_sin(dist * 10) / 16 +
lut_cos(x * ANGLE_UNIT / width * 2) / 8 +
lut_cos(y * ANGLE_UNIT / height * 2) / 8;
dx = x - xcenter;
dy = (y - ycenter) * 2;
dist = lut_dist(dx, dy);
angle = lut_angle(dx, dy);
color = (color + angle + lut_sin(dist * 10) / 16 +
lut_cos(x * ANGLE_UNIT / width * 2) / 8 +
lut_cos(y * ANGLE_UNIT / height * 2) / 8) /
2;
break;
case 38:
/* Intent is to interlace two different screens */
if( _y % 2 )
{
dy *= 2;
dist = lut_dist(dx, dy);
angle = lut_angle(dx, dy);
}
color = angle + lut_sin(dist * 8) / 32;
break;
case 39:
color = xor (mod(angle, (ANGLE_UNIT / 4)), dist);
dx = x - xcenter;
dy = (y - ycenter) * 2;
dist = lut_dist(dx, dy);
angle = lut_angle(dx, dy);
color = (color + (xor (mod(angle, (ANGLE_UNIT / 4)), dist))) / 2;
break;
case 40:
color = xor (dy, dx);
dx = x - xcenter;
dy = (y - ycenter) * 2;
color = (color + xor (dy, dx)) / 2;
break;
default:
color = RANDOM(255); // wig the f out
break;
}
_color = (long) color % (colors - 1);
if( color < 0 )
_color += (colors - 2);
++_color;
*(buf_graf + (pitch * _y) + _x) = (uint8_t) _color;
}
/* end for (y = 0; y < height; ++y) */
}
/* end for (x = 0; x < width; ++x) */
}