apps/plugins/mandelbrot.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2004 Matthias Wientapper
  11  * Heavily extended 2005 Jens Arnold
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version 2
  17  * of the License, or (at your option) any later version.
  18  *
  19  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  20  * KIND, either express or implied.
  21  *
  22  ****************************************************************************/
  23 #include "plugin.h"
  24
  25 #ifdef HAVE_LCD_BITMAP
  26 #include "lib/grey.h"
  27 #include "lib/xlcd.h"
  28
  29 PLUGIN_HEADER
  30
  31 /* variable button definitions */
  32 #if CONFIG_KEYPAD == RECORDER_PAD
  33 #define MANDELBROT_QUIT BUTTON_OFF
  34 #define MANDELBROT_UP BUTTON_UP
  35 #define MANDELBROT_DOWN BUTTON_DOWN
  36 #define MANDELBROT_LEFT BUTTON_LEFT
  37 #define MANDELBROT_RIGHT BUTTON_RIGHT
  38 #define MANDELBROT_ZOOM_IN BUTTON_PLAY
  39 #define MANDELBROT_ZOOM_OUT BUTTON_ON
  40 #define MANDELBROT_MAXITER_INC BUTTON_F2
  41 #define MANDELBROT_MAXITER_DEC BUTTON_F1
  42 #define MANDELBROT_RESET BUTTON_F3
  43
  44 #elif CONFIG_KEYPAD == ARCHOS_AV300_PAD
  45 #define MANDELBROT_QUIT BUTTON_OFF
  46 #define MANDELBROT_UP BUTTON_UP
  47 #define MANDELBROT_DOWN BUTTON_DOWN
  48 #define MANDELBROT_LEFT BUTTON_LEFT
  49 #define MANDELBROT_RIGHT BUTTON_RIGHT
  50 #define MANDELBROT_ZOOM_IN BUTTON_SELECT
  51 #define MANDELBROT_ZOOM_OUT BUTTON_ON
  52 #define MANDELBROT_MAXITER_INC BUTTON_F2
  53 #define MANDELBROT_MAXITER_DEC BUTTON_F1
  54 #define MANDELBROT_RESET BUTTON_F3
  55
  56 #elif CONFIG_KEYPAD == ONDIO_PAD
  57 #define MANDELBROT_QUIT BUTTON_OFF
  58 #define MANDELBROT_UP BUTTON_UP
  59 #define MANDELBROT_DOWN BUTTON_DOWN
  60 #define MANDELBROT_LEFT BUTTON_LEFT
  61 #define MANDELBROT_RIGHT BUTTON_RIGHT
  62 #define MANDELBROT_ZOOM_IN_PRE BUTTON_MENU
  63 #define MANDELBROT_ZOOM_IN (BUTTON_MENU | BUTTON_REL)
  64 #define MANDELBROT_ZOOM_IN2 (BUTTON_MENU | BUTTON_UP)
  65 #define MANDELBROT_ZOOM_OUT (BUTTON_MENU | BUTTON_DOWN)
  66 #define MANDELBROT_MAXITER_INC (BUTTON_MENU | BUTTON_RIGHT)
  67 #define MANDELBROT_MAXITER_DEC (BUTTON_MENU | BUTTON_LEFT)
  68 #define MANDELBROT_RESET (BUTTON_MENU | BUTTON_OFF)
  69
  70 #elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || \
  71       (CONFIG_KEYPAD == IRIVER_H300_PAD)
  72 #define MANDELBROT_QUIT BUTTON_OFF
  73 #define MANDELBROT_UP BUTTON_UP
  74 #define MANDELBROT_DOWN BUTTON_DOWN
  75 #define MANDELBROT_LEFT BUTTON_LEFT
  76 #define MANDELBROT_RIGHT BUTTON_RIGHT
  77 #define MANDELBROT_ZOOM_IN BUTTON_SELECT
  78 #define MANDELBROT_ZOOM_OUT BUTTON_MODE
  79 #define MANDELBROT_MAXITER_INC (BUTTON_ON | BUTTON_RIGHT)
  80 #define MANDELBROT_MAXITER_DEC (BUTTON_ON | BUTTON_LEFT)
  81 #define MANDELBROT_RESET BUTTON_REC
  82
  83 #define MANDELBROT_RC_QUIT BUTTON_RC_STOP
  84
  85 #elif (CONFIG_KEYPAD == IPOD_4G_PAD) || \
  86       (CONFIG_KEYPAD == IPOD_3G_PAD) || \
  87       (CONFIG_KEYPAD == IPOD_1G2G_PAD)
  88 #define MANDELBROT_QUIT (BUTTON_SELECT | BUTTON_MENU)
  89 #define MANDELBROT_UP BUTTON_MENU
  90 #define MANDELBROT_DOWN BUTTON_PLAY
  91 #define MANDELBROT_LEFT BUTTON_LEFT
  92 #define MANDELBROT_RIGHT BUTTON_RIGHT
  93 #define MANDELBROT_ZOOM_IN BUTTON_SCROLL_FWD
  94 #define MANDELBROT_ZOOM_OUT BUTTON_SCROLL_BACK
  95 #define MANDELBROT_MAXITER_INC (BUTTON_SELECT | BUTTON_RIGHT)
  96 #define MANDELBROT_MAXITER_DEC (BUTTON_SELECT | BUTTON_LEFT)
  97 #define MANDELBROT_RESET (BUTTON_SELECT | BUTTON_PLAY)
  98
  99 #elif CONFIG_KEYPAD == IAUDIO_X5M5_PAD
 100 #define MANDELBROT_QUIT            BUTTON_POWER
 101 #define MANDELBROT_UP              BUTTON_UP
 102 #define MANDELBROT_DOWN            BUTTON_DOWN
 103 #define MANDELBROT_LEFT            BUTTON_LEFT
 104 #define MANDELBROT_RIGHT           BUTTON_RIGHT
 105 #define MANDELBROT_ZOOM_IN_PRE     BUTTON_SELECT
 106 #define MANDELBROT_ZOOM_IN         (BUTTON_SELECT | BUTTON_REL)
 107 #define MANDELBROT_ZOOM_OUT_PRE    BUTTON_SELECT
 108 #define MANDELBROT_ZOOM_OUT        (BUTTON_SELECT | BUTTON_REPEAT)
 109 #define MANDELBROT_MAXITER_INC_PRE BUTTON_PLAY
 110 #define MANDELBROT_MAXITER_INC     (BUTTON_PLAY | BUTTON_REL)
 111 #define MANDELBROT_MAXITER_DEC_PRE BUTTON_PLAY
 112 #define MANDELBROT_MAXITER_DEC     (BUTTON_PLAY | BUTTON_REPEAT)
 113 #define MANDELBROT_RESET           BUTTON_REC
 114
 115 #elif CONFIG_KEYPAD == GIGABEAT_PAD
 116 #define MANDELBROT_QUIT         BUTTON_POWER
 117 #define MANDELBROT_UP           BUTTON_UP
 118 #define MANDELBROT_DOWN         BUTTON_DOWN
 119 #define MANDELBROT_LEFT         BUTTON_LEFT
 120 #define MANDELBROT_RIGHT        BUTTON_RIGHT
 121 #define MANDELBROT_ZOOM_IN_PRE  BUTTON_SELECT
 122 #define MANDELBROT_ZOOM_IN      (BUTTON_SELECT | BUTTON_REL)
 123 #define MANDELBROT_ZOOM_OUT_PRE BUTTON_SELECT
 124 #define MANDELBROT_ZOOM_OUT     (BUTTON_SELECT | BUTTON_REPEAT)
 125 #define MANDELBROT_MAXITER_INC  BUTTON_VOL_UP
 126 #define MANDELBROT_MAXITER_DEC  BUTTON_VOL_DOWN
 127 #define MANDELBROT_RESET        BUTTON_A
 128
 129 #elif CONFIG_KEYPAD == SANSA_E200_PAD
 130 #define MANDELBROT_QUIT BUTTON_POWER
 131 #define MANDELBROT_UP BUTTON_UP
 132 #define MANDELBROT_DOWN BUTTON_DOWN
 133 #define MANDELBROT_LEFT BUTTON_LEFT
 134 #define MANDELBROT_RIGHT BUTTON_RIGHT
 135 #define MANDELBROT_ZOOM_IN BUTTON_SCROLL_FWD
 136 #define MANDELBROT_ZOOM_OUT BUTTON_SCROLL_BACK
 137 #define MANDELBROT_MAXITER_INC (BUTTON_SELECT | BUTTON_RIGHT)
 138 #define MANDELBROT_MAXITER_DEC (BUTTON_SELECT | BUTTON_LEFT)
 139 #define MANDELBROT_RESET BUTTON_REC
 140
 141 #elif CONFIG_KEYPAD == SANSA_FUZE_PAD
 142 #define MANDELBROT_QUIT         (BUTTON_HOME|BUTTON_REPEAT)
 143 #define MANDELBROT_UP           BUTTON_UP
 144 #define MANDELBROT_DOWN         BUTTON_DOWN
 145 #define MANDELBROT_LEFT         BUTTON_LEFT
 146 #define MANDELBROT_RIGHT        BUTTON_RIGHT
 147 #define MANDELBROT_ZOOM_IN      BUTTON_SCROLL_FWD
 148 #define MANDELBROT_ZOOM_OUT     BUTTON_SCROLL_BACK
 149 #define MANDELBROT_MAXITER_INC (BUTTON_SELECT | BUTTON_RIGHT)
 150 #define MANDELBROT_MAXITER_DEC (BUTTON_SELECT | BUTTON_LEFT)
 151 #define MANDELBROT_RESET       (BUTTON_SELECT | BUTTON_REPEAT)
 152
 153 #elif CONFIG_KEYPAD == SANSA_C200_PAD
 154 #define MANDELBROT_QUIT BUTTON_POWER
 155 #define MANDELBROT_UP BUTTON_UP
 156 #define MANDELBROT_DOWN BUTTON_DOWN
 157 #define MANDELBROT_LEFT BUTTON_LEFT
 158 #define MANDELBROT_RIGHT BUTTON_RIGHT
 159 #define MANDELBROT_ZOOM_IN BUTTON_VOL_UP
 160 #define MANDELBROT_ZOOM_OUT BUTTON_VOL_DOWN
 161 #define MANDELBROT_MAXITER_INC (BUTTON_SELECT | BUTTON_RIGHT)
 162 #define MANDELBROT_MAXITER_DEC (BUTTON_SELECT | BUTTON_LEFT)
 163 #define MANDELBROT_RESET BUTTON_REC
 164
 165 #elif CONFIG_KEYPAD == SANSA_CLIP_PAD
 166 #define MANDELBROT_QUIT BUTTON_POWER
 167 #define MANDELBROT_UP BUTTON_UP
 168 #define MANDELBROT_DOWN BUTTON_DOWN
 169 #define MANDELBROT_LEFT BUTTON_LEFT
 170 #define MANDELBROT_RIGHT BUTTON_RIGHT
 171 #define MANDELBROT_ZOOM_IN BUTTON_VOL_UP
 172 #define MANDELBROT_ZOOM_OUT BUTTON_VOL_DOWN
 173 #define MANDELBROT_MAXITER_INC (BUTTON_SELECT | BUTTON_RIGHT)
 174 #define MANDELBROT_MAXITER_DEC (BUTTON_SELECT | BUTTON_LEFT)
 175 #define MANDELBROT_RESET BUTTON_HOME
 176
 177 #elif CONFIG_KEYPAD == SANSA_M200_PAD
 178 #define MANDELBROT_QUIT BUTTON_POWER
 179 #define MANDELBROT_UP BUTTON_UP
 180 #define MANDELBROT_DOWN BUTTON_DOWN
 181 #define MANDELBROT_LEFT BUTTON_LEFT
 182 #define MANDELBROT_RIGHT BUTTON_RIGHT
 183 #define MANDELBROT_ZOOM_IN BUTTON_VOL_UP
 184 #define MANDELBROT_ZOOM_OUT BUTTON_VOL_DOWN
 185 #define MANDELBROT_MAXITER_INC (BUTTON_SELECT | BUTTON_RIGHT)
 186 #define MANDELBROT_MAXITER_DEC (BUTTON_SELECT | BUTTON_LEFT)
 187 #define MANDELBROT_RESET (BUTTON_SELECT | BUTTON_UP)
 188
 189 #elif CONFIG_KEYPAD == IRIVER_H10_PAD
 190 #define MANDELBROT_QUIT          BUTTON_POWER
 191 #define MANDELBROT_UP            BUTTON_SCROLL_UP
 192 #define MANDELBROT_DOWN          BUTTON_SCROLL_DOWN
 193 #define MANDELBROT_LEFT          BUTTON_LEFT
 194 #define MANDELBROT_RIGHT         BUTTON_RIGHT
 195 #define MANDELBROT_ZOOM_IN_PRE   BUTTON_PLAY
 196 #define MANDELBROT_ZOOM_IN       (BUTTON_PLAY | BUTTON_REL)
 197 #define MANDELBROT_ZOOM_OUT_PRE  BUTTON_PLAY
 198 #define MANDELBROT_ZOOM_OUT      (BUTTON_PLAY | BUTTON_REPEAT)
 199 #define MANDELBROT_MAXITER_INC   BUTTON_FF
 200 #define MANDELBROT_MAXITER_DEC   BUTTON_REW
 201 #define MANDELBROT_RESET         (BUTTON_PLAY | BUTTON_REW)
 202
 203 #elif CONFIG_KEYPAD == IRIVER_IFP7XX_PAD
 204 #define MANDELBROT_QUIT          BUTTON_EQ
 205 #define MANDELBROT_UP            BUTTON_UP
 206 #define MANDELBROT_DOWN          BUTTON_DOWN
 207 #define MANDELBROT_LEFT          BUTTON_LEFT
 208 #define MANDELBROT_RIGHT         BUTTON_RIGHT
 209 #define MANDELBROT_ZOOM_IN_PRE   BUTTON_SELECT
 210 #define MANDELBROT_ZOOM_IN       (BUTTON_SELECT | BUTTON_REL)
 211 #define MANDELBROT_ZOOM_OUT_PRE  BUTTON_SELECT
 212 #define MANDELBROT_ZOOM_OUT      (BUTTON_SELECT | BUTTON_REPEAT)
 213 #define MANDELBROT_MAXITER_INC   (BUTTON_PLAY | BUTTON_RIGHT)
 214 #define MANDELBROT_MAXITER_DEC   (BUTTON_PLAY | BUTTON_LEFT)
 215 #define MANDELBROT_RESET         BUTTON_MODE
 216
 217 #elif CONFIG_KEYPAD == GIGABEAT_S_PAD
 218 #define MANDELBROT_QUIT          BUTTON_BACK
 219 #define MANDELBROT_UP            BUTTON_UP
 220 #define MANDELBROT_DOWN          BUTTON_DOWN
 221 #define MANDELBROT_LEFT          BUTTON_LEFT
 222 #define MANDELBROT_RIGHT         BUTTON_RIGHT
 223 #define MANDELBROT_ZOOM_IN       BUTTON_VOL_UP
 224 #define MANDELBROT_ZOOM_OUT      BUTTON_VOL_DOWN
 225 #define MANDELBROT_MAXITER_INC   BUTTON_PREV
 226 #define MANDELBROT_MAXITER_DEC   BUTTON_NEXT
 227 #define MANDELBROT_RESET         BUTTON_MENU
 228
 229 #elif CONFIG_KEYPAD == MROBE100_PAD
 230 #define MANDELBROT_QUIT         BUTTON_POWER
 231 #define MANDELBROT_UP           BUTTON_UP
 232 #define MANDELBROT_DOWN         BUTTON_DOWN
 233 #define MANDELBROT_LEFT         BUTTON_LEFT
 234 #define MANDELBROT_RIGHT        BUTTON_RIGHT
 235 #define MANDELBROT_ZOOM_IN_PRE  BUTTON_SELECT
 236 #define MANDELBROT_ZOOM_IN      (BUTTON_SELECT | BUTTON_REL)
 237 #define MANDELBROT_ZOOM_OUT_PRE BUTTON_SELECT
 238 #define MANDELBROT_ZOOM_OUT     (BUTTON_SELECT | BUTTON_REPEAT)
 239 #define MANDELBROT_MAXITER_INC  BUTTON_MENU
 240 #define MANDELBROT_MAXITER_DEC  BUTTON_PLAY
 241 #define MANDELBROT_RESET        BUTTON_DISPLAY
 242
 243 #elif CONFIG_KEYPAD == IAUDIO_M3_PAD
 244 #define MANDELBROT_QUIT            BUTTON_RC_REC
 245 #define MANDELBROT_UP              BUTTON_RC_VOL_UP
 246 #define MANDELBROT_DOWN            BUTTON_RC_VOL_DOWN
 247 #define MANDELBROT_LEFT            BUTTON_RC_REW
 248 #define MANDELBROT_RIGHT           BUTTON_RC_FF
 249 #define MANDELBROT_ZOOM_IN_PRE     BUTTON_RC_PLAY
 250 #define MANDELBROT_ZOOM_IN         (BUTTON_RC_PLAY | BUTTON_REL)
 251 #define MANDELBROT_ZOOM_OUT_PRE    BUTTON_RC_PLAY
 252 #define MANDELBROT_ZOOM_OUT        (BUTTON_RC_PLAY | BUTTON_REPEAT)
 253 #define MANDELBROT_MAXITER_INC_PRE BUTTON_RC_MODE
 254 #define MANDELBROT_MAXITER_INC     (BUTTON_RC_MODE|BUTTON_REL)
 255 #define MANDELBROT_MAXITER_DEC_PRE BUTTON_RC_MODE
 256 #define MANDELBROT_MAXITER_DEC     (BUTTON_RC_MODE|BUTTON_REPEAT)
 257 #define MANDELBROT_RESET           BUTTON_RC_MENU
 258
 259 #elif CONFIG_KEYPAD == COWOND2_PAD
 260 #define MANDELBROT_QUIT          BUTTON_POWER
 261
 262 #elif CONFIG_KEYPAD == CREATIVEZVM_PAD
 263 #define MANDELBROT_QUIT          BUTTON_BACK
 264 #define MANDELBROT_UP            BUTTON_UP
 265 #define MANDELBROT_DOWN          BUTTON_DOWN
 266 #define MANDELBROT_LEFT          BUTTON_LEFT
 267 #define MANDELBROT_RIGHT         BUTTON_RIGHT
 268 #define MANDELBROT_ZOOM_IN       BUTTON_PLAY
 269 #define MANDELBROT_ZOOM_OUT      BUTTON_MENU
 270 #define MANDELBROT_MAXITER_INC   (BUTTON_UP | BUTTON_CUSTOM)
 271 #define MANDELBROT_MAXITER_DEC   (BUTTON_DOWN | BUTTON_CUSTOM)
 272 #define MANDELBROT_RESET         BUTTON_SELECT
 273
 274 #elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD
 275 #define MANDELBROT_QUIT         BUTTON_POWER
 276 #define MANDELBROT_UP           BUTTON_UP
 277 #define MANDELBROT_DOWN         BUTTON_DOWN
 278 #define MANDELBROT_LEFT         BUTTON_LEFT
 279 #define MANDELBROT_RIGHT        BUTTON_RIGHT
 280 #define MANDELBROT_ZOOM_IN      BUTTON_VIEW
 281 #define MANDELBROT_ZOOM_OUT     BUTTON_PLAYLIST
 282 #define MANDELBROT_MAXITER_INC  BUTTON_VOL_UP
 283 #define MANDELBROT_MAXITER_DEC  BUTTON_VOL_DOWN
 284 #define MANDELBROT_RESET        BUTTON_MENU
 285
 286 #elif CONFIG_KEYPAD == ONDAVX747_PAD || CONFIG_KEYPAD == MROBE500_PAD
 287 #define MANDELBROT_QUIT          BUTTON_POWER
 288
 289 #elif CONFIG_KEYPAD == SAMSUNG_YH_PAD
 290 #define MANDELBROT_QUIT         BUTTON_REC
 291 #define MANDELBROT_UP           BUTTON_UP
 292 #define MANDELBROT_DOWN         BUTTON_DOWN
 293 #define MANDELBROT_LEFT         BUTTON_LEFT
 294 #define MANDELBROT_RIGHT        BUTTON_RIGHT
 295 #define MANDELBROT_ZOOM_IN_PRE  (BUTTON_FFWD | BUTTON_UP)
 296 #define MANDELBROT_ZOOM_IN      (BUTTON_REW | BUTTON_UP)
 297 #define MANDELBROT_ZOOM_OUT_PRE (BUTTON_FFWD | BUTTON_DOWN)
 298 #define MANDELBROT_ZOOM_OUT     (BUTTON_REW | BUTTON_DOWN)
 299 #define MANDELBROT_MAXITER_INC  (BUTTON_PLAY | BUTTON_UP)
 300 #define MANDELBROT_MAXITER_DEC  (BUTTON_FFWD | BUTTON_DOWN)
 301 #define MANDELBROT_RESET        (BUTTON_PLAY | BUTTON_RIGHT)
 302
 303 #else
 304 #error No keymap defined!
 305 #endif
 306
 307 #ifdef HAVE_TOUCHSCREEN
 308 #ifndef MANDELBROT_UP
 309 #define MANDELBROT_UP            BUTTON_TOPMIDDLE
 310 #endif
 311 #ifndef MANDELBROT_DOWN
 312 #define MANDELBROT_DOWN          BUTTON_BOTTOMMIDDLE
 313 #endif
 314 #ifndef MANDELBROT_LEFT
 315 #define MANDELBROT_LEFT          BUTTON_MIDLEFT
 316 #endif
 317 #ifndef MANDELBROT_RIGHT
 318 #define MANDELBROT_RIGHT         BUTTON_MIDRIGHT
 319 #endif
 320 #ifndef MANDELBROT_ZOOM_IN_PRE
 321 #define MANDELBROT_ZOOM_IN_PRE   BUTTON_TOPRIGHT
 322 #endif
 323 #ifndef MANDELBROT_ZOOM_IN
 324 #define MANDELBROT_ZOOM_IN      (BUTTON_TOPRIGHT | BUTTON_REL)
 325 #endif
 326 #ifndef MANDELBROT_ZOOM_OUT_PRE
 327 #define MANDELBROT_ZOOM_OUT_PRE  BUTTON_TOPLEFT
 328 #endif
 329 #ifndef MANDELBROT_ZOOM_OUT
 330 #define MANDELBROT_ZOOM_OUT     (BUTTON_TOPLEFT | BUTTON_REL)
 331 #endif
 332 #ifndef MANDELBROT_MAXITER_INC
 333 #define MANDELBROT_MAXITER_INC   BUTTON_BOTTOMRIGHT
 334 #endif
 335 #ifndef MANDELBROT_MAXITER_DEC
 336 #define MANDELBROT_MAXITER_DEC   BUTTON_BOTTOMLEFT
 337 #endif
 338 #ifndef MANDELBROT_RESET
 339 #define MANDELBROT_RESET         BUTTON_CENTER
 340 #endif
 341 #endif
 342
 343 #if LCD_DEPTH < 8
 344 #define USEGSLIB
 345 #define MYLCD(fn) grey_ub_ ## fn
 346 #define MYLCD_UPDATE()
 347 #define MYXLCD(fn) grey_ub_ ## fn
 348 #else
 349 #define UPDATE_FREQ (HZ/50)
 350 #define MYLCD(fn) rb->lcd_ ## fn
 351 #define MYLCD_UPDATE() rb->lcd_update();
 352 #define MYXLCD(fn) xlcd_ ## fn
 353 #endif
 354
 355 /* Fixed point format s5.26: sign, 5 bits integer part, 26 bits fractional part */
 356 static long x_min;
 357 static long x_max;
 358 static long x_step;
 359 static long x_delta;
 360 static long y_min;
 361 static long y_max;
 362 static long y_step;
 363 static long y_delta;
 364
 365 static int px_min = 0;
 366 static int px_max = LCD_WIDTH;
 367 static int py_min = 0;
 368 static int py_max = LCD_HEIGHT;
 369
 370 static int step_log2;
 371 static unsigned max_iter;
 372
 373 #ifdef USEGSLIB
 374 GREY_INFO_STRUCT
 375 static unsigned char *gbuf;
 376 static size_t  gbuf_size = 0;
 377 static unsigned char imgbuffer[LCD_HEIGHT];
 378 #else
 379 static fb_data imgbuffer[LCD_HEIGHT];
 380 #endif
 381
 382 /* 8 entries cyclical, last entry is black (convergence) */
 383 #ifdef HAVE_LCD_COLOR
 384 static const fb_data color[9] = {
 385     LCD_RGBPACK(255, 0, 159), LCD_RGBPACK(159, 0, 255), LCD_RGBPACK(0, 0, 255),
 386     LCD_RGBPACK(0, 159, 255), LCD_RGBPACK(0, 255, 128), LCD_RGBPACK(128, 255, 0),
 387     LCD_RGBPACK(255, 191, 0), LCD_RGBPACK(255, 0, 0),   LCD_RGBPACK(0, 0, 0)
 388 };
 389 #else /* greyscale */
 390 static const unsigned char color[9] = {
 391     255, 223, 191, 159, 128, 96, 64, 32, 0
 392 };
 393 #endif
 394
 395 #if CONFIG_CPU == SH7034
 396
 397 #define MULS16_ASR10(a, b) muls16_asr10(a, b)
 398 static inline short muls16_asr10(short a, short b)
 399 {
 400     short r;
 401     asm (
 402         "muls    %[a],%[b]   \n"
 403         "sts     macl,%[r]   \n"
 404         "shlr8   %[r]        \n"
 405         "shlr2   %[r]        \n"
 406         : /* outputs */
 407         [r]"=r"(r)
 408         : /* inputs */
 409         [a]"r"(a),
 410         [b]"r"(b)
 411     );
 412     return r;
 413 }
 414
 415 #define MULS32_ASR26(a, b) muls32_asr26(a, b)
 416 static inline long muls32_asr26(long a, long b)
 417 {
 418     long r, t1, t2, t3;
 419     asm (
 420         /* Signed 32bit * 32bit -> 64bit multiplication.
 421            Notation: xxab * xxcd, where each letter represents 16 bits.
 422            xx is the 64 bit sign extension.  */
 423         "swap.w  %[a],%[t1]  \n" /* t1 = ba */
 424         "mulu    %[t1],%[b]  \n" /* a * d */
 425         "swap.w  %[b],%[t3]  \n" /* t3 = dc */
 426         "sts     macl,%[t2]  \n" /* t2 = a * d */
 427         "mulu    %[t1],%[t3] \n" /* a * c */
 428         "sts     macl,%[r]   \n" /* hi = a * c */
 429         "mulu    %[a],%[t3]  \n" /* b * c */
 430         "clrt                \n"
 431         "sts     macl,%[t3]  \n" /* t3 = b * c */
 432         "addc    %[t2],%[t3] \n" /* t3 += t2, carry -> t2 */
 433         "movt    %[t2]       \n"
 434         "mulu    %[a],%[b]   \n" /* b * d */
 435         "mov     %[t3],%[t1] \n" /* t1t3 = t2t3 << 16 */
 436         "xtrct   %[t2],%[t1] \n"
 437         "shll16  %[t3]       \n"
 438         "sts     macl,%[t2]  \n" /* lo = b * d */
 439         "clrt                \n" /* hi.lo += t1t3 */
 440         "addc    %[t3],%[t2] \n"
 441         "addc    %[t1],%[r]  \n"
 442         "cmp/pz  %[a]        \n" /* ab >= 0 ? */
 443         "bt      1f          \n"
 444         "sub     %[b],%[r]   \n" /* no: hi -= cd (sign extension of ab is -1) */
 445     "1:                      \n"
 446         "cmp/pz  %[b]        \n" /* cd >= 0 ? */
 447         "bt      2f          \n"
 448         "sub     %[a],%[r]   \n" /* no: hi -= ab (sign extension of cd is -1) */
 449     "2:                      \n"
 450         /* Shift right by 26 and return low 32 bits */
 451         "shll2   %[r]        \n" /* hi <<= 6 */
 452         "shll2   %[r]        \n"
 453         "shll2   %[r]        \n"
 454         "shlr16  %[t2]       \n" /* (unsigned)lo >>= 26 */
 455         "shlr8   %[t2]       \n"
 456         "shlr2   %[t2]       \n"
 457         "or      %[t2],%[r]  \n" /* combine result */
 458         : /* outputs */
 459         [r] "=&r"(r),
 460         [t1]"=&r"(t1),
 461         [t2]"=&r"(t2),
 462         [t3]"=&r"(t3)
 463         : /* inputs */
 464         [a] "r"  (a),
 465         [b] "r"  (b)
 466     );
 467     return r;
 468 }
 469
 470 #elif defined CPU_COLDFIRE
 471
 472 #define MULS16_ASR10(a, b) muls16_asr10(a, b)
 473 static inline short muls16_asr10(short a, short b)
 474 {
 475     asm (
 476         "muls.w  %[a],%[b]   \n"
 477         "asr.l   #8,%[b]     \n"
 478         "asr.l   #2,%[b]     \n"
 479         : /* outputs */
 480         [b]"+d"(b)
 481         : /* inputs */
 482         [a]"d" (a)
 483     );
 484     return b;
 485 }
 486
 487 /* Needs the EMAC initialised to fractional mode w/o rounding and saturation */
 488 #define MULS32_INIT() coldfire_set_macsr(EMAC_FRACTIONAL)
 489 #define MULS32_ASR26(a, b) muls32_asr26(a, b)
 490 static inline long muls32_asr26(long a, long b)
 491 {
 492     long r, t1;
 493     asm (
 494         "mac.l   %[a], %[b], %%acc0  \n" /* multiply */
 495         "move.l  %%accext01, %[t1]   \n" /* get low part */
 496         "movclr.l %%acc0, %[r]       \n" /* get high part */
 497         "asl.l   #5, %[r]            \n" /* hi <<= 5, plus one free */
 498         "lsr.l   #3, %[t1]           \n" /* lo >>= 3 */
 499         "and.l   #0x1f, %[t1]        \n" /* mask out unrelated bits */
 500         "or.l    %[t1], %[r]         \n" /* combine result */
 501         : /* outputs */
 502         [r] "=d"(r),
 503         [t1]"=d"(t1)
 504         : /* inputs */
 505         [a] "d" (a),
 506         [b] "d" (b)
 507     );
 508     return r;
 509 }
 510
 511 #elif defined CPU_ARM
 512
 513 #define MULS32_ASR26(a, b) muls32_asr26(a, b)
 514 static inline long muls32_asr26(long a, long b)
 515 {
 516     long r, t1;
 517     asm (
 518         "smull   %[r], %[t1], %[a], %[b]     \n"
 519         "mov     %[r], %[r], lsr #26         \n"
 520         "orr     %[r], %[r], %[t1], lsl #6   \n"
 521         : /* outputs */
 522         [r] "=&r,&r,&r"(r),
 523         [t1]"=&r,&r,&r"(t1)
 524         : /* inputs */
 525         [a] "%r,%r,%r" (a),
 526         [b] "r,0,1" (b)
 527     );
 528     return r;
 529 }
 530
 531 #endif /* CPU */
 532
 533 /* default macros */
 534 #ifndef MULS16_ASR10
 535 #define MULS16_ASR10(a, b) ((short)(((long)(a) * (long)(b)) >> 10))
 536 #endif
 537 #ifndef MULS32_ASR26
 538 #define MULS32_ASR26(a, b) ((long)(((long long)(a) * (long long)(b)) >> 26))
 539 #endif
 540 #ifndef MULS32_INIT
 541 #define MULS32_INIT()
 542 #endif
 543
 544 int ilog2_fp(long value) /* calculate integer log2(value_fp_6.26) */
 545 {
 546     int i = 0;
 547
 548     if (value <= 0) {
 549         return -32767;
 550     } else if (value > (1L<<26)) {
 551         while (value >= (2L<<26)) {
 552             value >>= 1;
 553             i++;
 554         }
 555     } else {
 556         while (value < (1L<<26)) {
 557             value <<= 1;
 558             i--;
 559         }
 560     }
 561     return i;
 562 }
 563
 564 void recalc_parameters(void)
 565 {
 566     x_step = (x_max - x_min) / LCD_WIDTH;
 567     x_delta = (x_step * LCD_WIDTH) / 8;
 568     y_step = (y_max - y_min) / LCD_HEIGHT;
 569     y_delta = (y_step * LCD_HEIGHT) / 8;
 570     step_log2 = ilog2_fp(MIN(x_step, y_step));
 571     max_iter = MAX(15, -15 * step_log2 - 45);
 572 }
 573
 574 #if CONFIG_LCD == LCD_SSD1815
 575 /* Recorder, Ondio: pixel_height == 1.25 * pixel_width */
 576 #define MB_HEIGHT (LCD_HEIGHT*5/4)
 577 #else
 578 /* square pixels */
 579 #define MB_HEIGHT LCD_HEIGHT
 580 #endif
 581
 582 #define MB_XOFS (-0x03000000L)       /* -0.75 (s5.26) */
 583 #if 3000*MB_HEIGHT/LCD_WIDTH >= 2400 /* width is limiting factor */
 584 #define MB_XFAC (0x06000000LL)       /* 1.5 (s5.26) */
 585 #define MB_YFAC (MB_XFAC*MB_HEIGHT/LCD_WIDTH)
 586 #else                                /* height is limiting factor */
 587 #define MB_YFAC (0x04cccccdLL)       /* 1.2 (s5.26) */
 588 #define MB_XFAC (MB_YFAC*LCD_WIDTH/MB_HEIGHT)
 589 #endif
 590
 591 void init_mandelbrot_set(void)
 592 {
 593     x_min = MB_XOFS-MB_XFAC;
 594     x_max = MB_XOFS+MB_XFAC;
 595     y_min = -MB_YFAC;
 596     y_max = MB_YFAC;
 597     recalc_parameters();
 598 }
 599
 600 void calc_mandelbrot_low_prec(void)
 601 {
 602     long start_tick, last_yield;
 603 #ifndef USEGSLIB
 604     long next_update = *rb->current_tick;
 605     int last_px = px_min;
 606 #endif
 607     unsigned n_iter;
 608     long a32, b32;
 609     short x, x2, y, y2, a, b;
 610     int p_x, p_y;
 611
 612     start_tick = last_yield = *rb->current_tick;
 613
 614     for (p_x = 0, a32 = x_min; p_x < px_max; p_x++, a32 += x_step) {
 615         if (p_x < px_min)
 616             continue;
 617         a = a32 >> 16;
 618         for (p_y = LCD_HEIGHT-1, b32 = y_min; p_y >= py_min; p_y--, b32 += y_step) {
 619             if (p_y >= py_max)
 620                 continue;
 621             b = b32 >> 16;
 622             x = a;
 623             y = b;
 624             n_iter = 0;
 625
 626             while (++n_iter <= max_iter) {
 627                 x2 = MULS16_ASR10(x, x);
 628                 y2 = MULS16_ASR10(y, y);
 629
 630                 if (x2 + y2 > (4<<10)) break;
 631
 632                 y = 2 * MULS16_ASR10(x, y) + b;
 633                 x = x2 - y2 + a;
 634             }
 635
 636             if  (n_iter > max_iter)
 637                 imgbuffer[p_y] = color[8];
 638             else
 639                 imgbuffer[p_y] = color[n_iter & 7];
 640
 641             /* be nice to other threads:
 642              * if at least one tick has passed, yield */
 643             if  (*rb->current_tick > last_yield) {
 644                 rb->yield();
 645                 last_yield = *rb->current_tick;
 646             }
 647         }
 648 #ifdef USEGSLIB
 649         grey_ub_gray_bitmap_part(imgbuffer, 0, py_min, 1,
 650                                  p_x, py_min, 1, py_max - py_min);
 651 #else
 652         rb->lcd_bitmap_part(imgbuffer, 0, py_min, 1,
 653                             p_x, py_min, 1, py_max - py_min);
 654         if ((p_x == px_max - 1) || TIME_AFTER(*rb->current_tick, next_update))
 655         {
 656             next_update = *rb->current_tick + UPDATE_FREQ;
 657             rb->lcd_update_rect(last_px, py_min, p_x - last_px + 1,
 658                                 py_max - py_min);
 659             last_px = p_x;
 660         }
 661 #endif
 662     }
 663 }
 664
 665 void calc_mandelbrot_high_prec(void)
 666 {
 667     long start_tick, last_yield;
 668 #ifndef USEGSLIB
 669     long next_update = *rb->current_tick;
 670     int last_px = px_min;
 671 #endif
 672     unsigned n_iter;
 673     long x, x2, y, y2, a, b;
 674     int p_x, p_y;
 675
 676     MULS32_INIT();
 677     start_tick = last_yield = *rb->current_tick;
 678
 679     for (p_x = 0, a = x_min; p_x < px_max; p_x++, a += x_step) {
 680         if (p_x < px_min)
 681             continue;
 682         for (p_y = LCD_HEIGHT-1, b = y_min; p_y >= py_min; p_y--, b += y_step) {
 683             if (p_y >= py_max)
 684                 continue;
 685             x = a;
 686             y = b;
 687             n_iter = 0;
 688
 689             while (++n_iter <= max_iter) {
 690                 x2 = MULS32_ASR26(x, x);
 691                 y2 = MULS32_ASR26(y, y);
 692
 693                 if (x2 + y2 > (4L<<26)) break;
 694
 695                 y = 2 * MULS32_ASR26(x, y) + b;
 696                 x = x2 - y2 + a;
 697             }
 698
 699             if  (n_iter > max_iter)
 700                 imgbuffer[p_y] = color[8];
 701             else
 702                 imgbuffer[p_y] = color[n_iter & 7];
 703
 704             /* be nice to other threads:
 705              * if at least one tick has passed, yield */
 706             if  (*rb->current_tick > last_yield) {
 707                 rb->yield();
 708                 last_yield = *rb->current_tick;
 709             }
 710         }
 711 #ifdef USEGSLIB
 712         grey_ub_gray_bitmap_part(imgbuffer, 0, py_min, 1,
 713                                  p_x, py_min, 1, py_max - py_min);
 714 #else
 715         rb->lcd_bitmap_part(imgbuffer, 0, py_min, 1,
 716                             p_x, py_min, 1, py_max-py_min);
 717         if ((p_x == px_max - 1) || TIME_AFTER(*rb->current_tick, next_update))
 718         {
 719             next_update = *rb->current_tick + UPDATE_FREQ;
 720             rb->lcd_update_rect(last_px, py_min, p_x - last_px + 1,
 721                                 py_max - py_min);
 722             last_px = p_x;
 723         }
 724 #endif
 725     }
 726 }
 727
 728 void cleanup(void *parameter)
 729 {
 730     (void)parameter;
 731 #ifdef USEGSLIB
 732     grey_release();
 733 #endif
 734 }
 735
 736 #define REDRAW_NONE    0
 737 #define REDRAW_PARTIAL 1
 738 #define REDRAW_FULL    2
 739
 740 enum plugin_status plugin_start(const void* parameter)
 741 {
 742     int button;
 743     int lastbutton = BUTTON_NONE;
 744     int redraw = REDRAW_FULL;
 745
 746     (void)parameter;
 747
 748 #ifdef USEGSLIB
 749     /* get the remainder of the plugin buffer */
 750     gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size);
 751
 752     /* initialize the greyscale buffer.*/
 753     if (!grey_init(gbuf, gbuf_size, GREY_ON_COP,
 754                    LCD_WIDTH, LCD_HEIGHT, NULL))
 755     {
 756         rb->splash(HZ, "Couldn't init greyscale display");
 757         return 0;
 758     }
 759     grey_show(true); /* switch on greyscale overlay */
 760 #endif
 761
 762 #if LCD_DEPTH > 1
 763     rb->lcd_set_backdrop(NULL);
 764 #endif
 765
 766     init_mandelbrot_set();
 767
 768     /* main loop */
 769     while (true) {
 770         if (redraw > REDRAW_NONE) {
 771 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 772             rb->cpu_boost(true);
 773 #endif
 774             if (redraw == REDRAW_FULL) {
 775                 MYLCD(clear_display)();
 776                 MYLCD_UPDATE();
 777             }
 778
 779             if (step_log2 <= -10) /* select precision */
 780                 calc_mandelbrot_high_prec();
 781             else
 782                 calc_mandelbrot_low_prec();
 783
 784 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 785             rb->cpu_boost(false);
 786 #endif
 787             px_min = 0;
 788             px_max = LCD_WIDTH;
 789             py_min = 0;
 790             py_max = LCD_HEIGHT;
 791             redraw = REDRAW_NONE;
 792         }
 793
 794         button = rb->button_get(true);
 795         switch (button) {
 796 #ifdef MANDELBROT_RC_QUIT
 797         case MANDELBROT_RC_QUIT:
 798 #endif
 799         case MANDELBROT_QUIT:
 800 #ifdef USEGSLIB
 801             grey_release();
 802 #endif
 803             return PLUGIN_OK;
 804
 805         case MANDELBROT_ZOOM_OUT:
 806 #ifdef MANDELBROT_ZOOM_OUT_PRE
 807             if (lastbutton != MANDELBROT_ZOOM_OUT_PRE)
 808                 break;
 809 #endif
 810             x_min -= x_delta;
 811             x_max += x_delta;
 812             y_min -= y_delta;
 813             y_max += y_delta;
 814             recalc_parameters();
 815             redraw = REDRAW_FULL;
 816             break;
 817
 818
 819         case MANDELBROT_ZOOM_IN:
 820 #ifdef MANDELBROT_ZOOM_IN_PRE
 821             if (lastbutton != MANDELBROT_ZOOM_IN_PRE)
 822                 break;
 823 #endif
 824 #ifdef MANDELBROT_ZOOM_IN2
 825         case MANDELBROT_ZOOM_IN2:
 826 #endif
 827             x_min += x_delta;
 828             x_max -= x_delta;
 829             y_min += y_delta;
 830             y_max -= y_delta;
 831             recalc_parameters();
 832             redraw = REDRAW_FULL;
 833             break;
 834
 835         case MANDELBROT_UP:
 836             y_min += y_delta;
 837             y_max += y_delta;
 838             MYXLCD(scroll_down)(LCD_HEIGHT/8);
 839             MYLCD_UPDATE();
 840             py_max = (LCD_HEIGHT/8);
 841             redraw = REDRAW_PARTIAL;
 842             break;
 843
 844         case MANDELBROT_DOWN:
 845             y_min -= y_delta;
 846             y_max -= y_delta;
 847             MYXLCD(scroll_up)(LCD_HEIGHT/8);
 848             MYLCD_UPDATE();
 849             py_min = (LCD_HEIGHT-LCD_HEIGHT/8);
 850             redraw = REDRAW_PARTIAL;
 851             break;
 852
 853         case MANDELBROT_LEFT:
 854             x_min -= x_delta;
 855             x_max -= x_delta;
 856             MYXLCD(scroll_right)(LCD_WIDTH/8);
 857             MYLCD_UPDATE();
 858             px_max = (LCD_WIDTH/8);
 859             redraw = REDRAW_PARTIAL;
 860             break;
 861
 862         case MANDELBROT_RIGHT:
 863             x_min += x_delta;
 864             x_max += x_delta;
 865             MYXLCD(scroll_left)(LCD_WIDTH/8);
 866             MYLCD_UPDATE();
 867             px_min = (LCD_WIDTH-LCD_WIDTH/8);
 868             redraw = REDRAW_PARTIAL;
 869             break;
 870
 871         case MANDELBROT_MAXITER_DEC:
 872 #ifdef MANDELBROT_MAXITER_DEC_PRE
 873             if (lastbutton != MANDELBROT_MAXITER_DEC_PRE)
 874                 break;
 875 #endif
 876             if (max_iter >= 15) {
 877                 max_iter -= max_iter / 3;
 878                 redraw = REDRAW_FULL;
 879             }
 880             break;
 881
 882         case MANDELBROT_MAXITER_INC:
 883 #ifdef MANDELBROT_MAXITER_INC_PRE
 884             if (lastbutton != MANDELBROT_MAXITER_INC_PRE)
 885                 break;
 886 #endif
 887             max_iter += max_iter / 2;
 888             redraw = REDRAW_FULL;
 889             break;
 890
 891         case MANDELBROT_RESET:
 892             init_mandelbrot_set();
 893             redraw = REDRAW_FULL;
 894             break;
 895
 896         default:
 897             if (rb->default_event_handler_ex(button, cleanup, NULL)
 898                 == SYS_USB_CONNECTED)
 899                 return PLUGIN_USB_CONNECTED;
 900             break;
 901         }
 902         if (button != BUTTON_NONE)
 903             lastbutton = button;
 904     }
 905 #ifdef USEGSLIB
 906     grey_release();
 907 #endif
 908     return PLUGIN_OK;
 909 }
 910 #endif